libtransport.git Changeset - 5d3244bd8bf7

Changeset - 5d3244bd8bf7

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Jan Kaluza - 10 years ago 2015-12-30 11:53:24
jkaluza@redhat.com

Update spectrum2_manager server to new mongoose release

5 files changed with 10513 insertions and 3939 deletions:

spectrum_manager/src/main.cpp

spectrum_manager/src/mongoose.c

7716

3574

spectrum_manager/src/mongoose.h

2707

258

spectrum_manager/src/server.cpp

spectrum_manager/src/server.h

0 comments (0 inline, 0 general)

spectrum_manager/src/main.cpp

➞

Show inline comments

@@ @@ -147,7 +147,6 @@ int main(int argc, char **argv) @@
 			std::cerr << "Can't set up server handler.\n";
 			return 1;
+		}
 		while (1) { sleep(10); }
+	}
 	else {
 		if (command.size() < 2) {

spectrum_manager/src/mongoose.c

➞

Show inline comments

 // Copyright (c) 2004-2012 Sergey Lyubka
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 #include <netinet/in.h>
 #include "mongoose.h"
 #ifdef NS_MODULE_LINES
 #line 1 "src/internal.h"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #if defined(_WIN32)
 #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
 #else
 #define _XOPEN_SOURCE 600     // For flockfile() on Linux
 #define _LARGEFILE_SOURCE     // Enable 64-bit file offsets
 #define __STDC_FORMAT_MACROS  // <inttypes.h> wants this for C++
 #define __STDC_LIMIT_MACROS   // C++ wants that for INT64_MAX
 #endif
 #if defined(__SYMBIAN32__)
 #define NO_SSL // SSL is not supported
 #define NO_CGI // CGI is not supported
 #define PATH_MAX FILENAME_MAX
 #endif // __SYMBIAN32__
 #ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
 #include <signal.h>
 #include <fcntl.h>
 #endif // !_WIN32_WCE
 #include <time.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <assert.h>
 #include <string.h>
 #include <ctype.h>
 #include <limits.h>
 #include <stddef.h>
 #include <stdio.h>
 #ifndef MG_INTERNAL_HEADER_INCLUDED
 #define MG_INTERNAL_HEADER_INCLUDED
 #if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
 #define _WIN32_WINNT 0x0400 // To make it link in VS2005
 #include <windows.h>
 #ifndef PATH_MAX
 #define PATH_MAX MAX_PATH
 #endif
 #ifndef _WIN32_WCE
 #include <process.h>
 #include <direct.h>
 #include <io.h>
 #else // _WIN32_WCE
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #define NO_CGI // WinCE has no pipes
 typedef long off_t;
 #define errno   GetLastError()
 #define strerror(x)  _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
 #endif // _WIN32_WCE
 #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
       ((uint64_t)((uint32_t)(hi))) << 32))
 #define RATE_DIFF 10000000 // 100 nsecs
 #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
 #define SYS2UNIX_TIME(lo, hi) \
   (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
 // Visual Studio 6 does not know __func__ or __FUNCTION__
 // The rest of MS compilers use __FUNCTION__, not C99 __func__
 // Also use _strtoui64 on modern M$ compilers
 #if defined(_MSC_VER) && _MSC_VER < 1300
 #define STRX(x) #x
 #define STR(x) STRX(x)
 #define __func__ "line " STR(__LINE__)
 #define strtoull(x, y, z) strtoul(x, y, z)
 #define strtoll(x, y, z) strtol(x, y, z)
 #else
 #define __func__  __FUNCTION__
 #define strtoull(x, y, z) _strtoui64(x, y, z)
 #define strtoll(x, y, z) _strtoi64(x, y, z)
 #endif // _MSC_VER
 #define ERRNO   GetLastError()
 #define NO_SOCKLEN_T
 #define SSL_LIB   "ssleay32.dll"
 #define CRYPTO_LIB  "libeay32.dll"
 #define DIRSEP '\\'
 #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
 #define O_NONBLOCK  0
 #if !defined(EWOULDBLOCK)
 #define EWOULDBLOCK  WSAEWOULDBLOCK
 #endif // !EWOULDBLOCK
 #define _POSIX_
 #define INT64_FMT  "I64d"
 #define WINCDECL __cdecl
 #define SHUT_WR 1
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
 #define mg_sleep(x) Sleep(x)
 #define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY)
 #define popen(x, y) _popen(x, y)
 #define pclose(x) _pclose(x)
 #define close(x) _close(x)
 #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
 #define RTLD_LAZY  0
 #define fseeko(x, y, z) _lseeki64(_fileno(x), (y), (z))
 #define fdopen(x, y) _fdopen((x), (y))
 #define write(x, y, z) _write((x), (y), (unsigned) z)
 #define read(x, y, z) _read((x), (y), (unsigned) z)
 #define flockfile(x) EnterCriticalSection(&global_log_file_lock)
 #define funlockfile(x) LeaveCriticalSection(&global_log_file_lock)
 #if !defined(fileno)
 #define fileno(x) _fileno(x)
 #endif // !fileno MINGW #defines fileno
 typedef HANDLE pthread_mutex_t;
 typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
 typedef DWORD pthread_t;
 #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
 struct timespec {
   long tv_nsec;
   long tv_sec;
 };
 #ifndef MG_MALLOC
 #define MG_MALLOC malloc
 #endif
 static int pthread_mutex_lock(pthread_mutex_t *);
 static int pthread_mutex_unlock(pthread_mutex_t *);
 static FILE *mg_fopen(const char *path, const char *mode);
 #ifndef MG_CALLOC
 #define MG_CALLOC calloc
 #endif
 #if defined(HAVE_STDINT)
 #include <stdint.h>
 #else
 typedef unsigned int  uint32_t;
 typedef unsigned short  uint16_t;
 typedef unsigned __int64 uint64_t;
 typedef __int64   int64_t;
 #define INT64_MAX  9223372036854775807
 #endif // HAVE_STDINT
 // POSIX dirent interface
 struct dirent {
   char d_name[PATH_MAX];
 };
 #ifndef MG_REALLOC
 #define MG_REALLOC realloc
 #endif
 typedef struct DIR {
   HANDLE   handle;
   WIN32_FIND_DATAW info;
   struct dirent  result;
 } DIR;
 #else    // UNIX  specific
 #include <sys/wait.h>
 #include <sys/socket.h>
 #include <sys/select.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <sys/time.h>
 #include <stdint.h>
 #include <inttypes.h>
 #include <netdb.h>
 #include <pwd.h>
 #include <unistd.h>
 #include <dirent.h>
 #if !defined(NO_SSL_DL) && !defined(NO_SSL)
 #include <dlfcn.h>
 #endif
 #include <pthread.h>
 #if defined(__MACH__)
 #define SSL_LIB   "libssl.dylib"
 #define CRYPTO_LIB  "libcrypto.dylib"
 #else
 #if !defined(SSL_LIB)
 #define SSL_LIB   "libssl.so"
 #endif
 #if !defined(CRYPTO_LIB)
 #define CRYPTO_LIB  "libcrypto.so"
 #endif
 #endif
 #define DIRSEP   '/'
 #define IS_DIRSEP_CHAR(c) ((c) == '/')
 #ifndef O_BINARY
 #define O_BINARY  0
 #endif // O_BINARY
 #define closesocket(a) close(a)
 #define mg_fopen(x, y) fopen(x, y)
 #define mg_mkdir(x, y) mkdir(x, y)
 #define mg_remove(x) remove(x)
 #define mg_rename(x, y) rename(x, y)
 #define mg_sleep(x) usleep((x) * 1000)
 #define ERRNO errno
 #define INVALID_SOCKET (-1)
 #define INT64_FMT PRId64
 typedef int SOCKET;
 #define WINCDECL
 #endif // End of Windows and UNIX specific includes
 #ifndef MG_FREE
 #define MG_FREE free
 #endif
 #include "mongoose.h"
 #ifndef MBUF_REALLOC
 #define MBUF_REALLOC MG_REALLOC
 #endif
 #define MONGOOSE_VERSION "3.3"
 #define PASSWORDS_FILE_NAME ".htpasswd"
 #define CGI_ENVIRONMENT_SIZE 4096
 #define MAX_CGI_ENVIR_VARS 64
 #define MG_BUF_LEN 8192
 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
 #ifndef MBUF_FREE
 #define MBUF_FREE MG_FREE
 #endif
 #ifdef _WIN32
 static CRITICAL_SECTION global_log_file_lock;
 static pthread_t pthread_self(void) {
   return GetCurrentThreadId();
+}
 #endif // _WIN32
 #if defined(DEBUG)
 #define DEBUG_TRACE(x) do { \
   flockfile(stdout); \
   printf("*** %lu.%p.%s.%d: ", \
          (unsigned long) time(NULL), (void *) pthread_self(), \
          __func__, __LINE__); \
   printf x; \
   putchar('\n'); \
   fflush(stdout); \
   funlockfile(stdout); \
 #define MG_SET_PTRPTR(_ptr, _v) \
   do {                          \
     if (_ptr) *(_ptr) = _v;     \
   } while (0)
 #else
 #define DEBUG_TRACE(x)
 #endif // DEBUG
 // Darwin prior to 7.0 and Win32 do not have socklen_t
 #ifdef NO_SOCKLEN_T
 typedef int socklen_t;
 #endif // NO_SOCKLEN_T
 #define _DARWIN_UNLIMITED_SELECT
 #if !defined(MSG_NOSIGNAL)
 #define MSG_NOSIGNAL 0
 #endif
 #if !defined(SOMAXCONN)
 #define SOMAXCONN 100
 #endif
 static const char *http_500_error = "Internal Server Error";
 // Snatched from OpenSSL includes. I put the prototypes here to be independent
 // from the OpenSSL source installation. Having this, mongoose + SSL can be
 // built on any system with binary SSL libraries installed.
 typedef struct ssl_st SSL;
 typedef struct ssl_method_st SSL_METHOD;
 typedef struct ssl_ctx_st SSL_CTX;
 #define SSL_ERROR_WANT_READ 2
 #define SSL_ERROR_WANT_WRITE 3
 #define SSL_FILETYPE_PEM 1
 #define CRYPTO_LOCK  1
 #if defined(NO_SSL_DL)
 extern void SSL_free(SSL *);
 extern int SSL_accept(SSL *);
 extern int SSL_connect(SSL *);
 extern int SSL_read(SSL *, void *, int);
 extern int SSL_write(SSL *, const void *, int);
 extern int SSL_get_error(const SSL *, int);
 extern int SSL_set_fd(SSL *, int);
 extern SSL *SSL_new(SSL_CTX *);
 extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
 extern SSL_METHOD *SSLv23_server_method(void);
 extern SSL_METHOD *SSLv23_client_method(void);
 extern int SSL_library_init(void);
 extern void SSL_load_error_strings(void);
 extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
 extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
 extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
 extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
 extern void SSL_CTX_free(SSL_CTX *);
 extern unsigned long ERR_get_error(void);
 extern char *ERR_error_string(unsigned long, char *);
 extern int CRYPTO_num_locks(void);
 extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
 extern void CRYPTO_set_id_callback(unsigned long (*)(void));
 #else
 // Dynamically loaded SSL functionality
 struct ssl_func {
   const char *name;   // SSL function name
   void  (*ptr)(void); // Function pointer
 };
 #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
 #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
 #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
 #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
 #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
 #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
 #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
 #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
 #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
 #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
 #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
 #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
         const char *, int)) ssl_sw[11].ptr)
 #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
         const char *, int)) ssl_sw[12].ptr)
 #define SSL_CTX_set_default_passwd_cb \
   (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
 #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
 #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
 #define SSL_CTX_use_certificate_chain_file \
   (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
 #define SSLv23_client_method (* (SSL_METHOD * (*)(void)) ssl_sw[17].ptr)
 #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
 #define CRYPTO_set_locking_callback \
   (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
 #define CRYPTO_set_id_callback \
   (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
 #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
 #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
 // set_ssl_option() function updates this array.
 // It loads SSL library dynamically and changes NULLs to the actual addresses
 // of respective functions. The macros above (like SSL_connect()) are really
 // just calling these functions indirectly via the pointer.
 static struct ssl_func ssl_sw[] = {
   {"SSL_free",   NULL},
   {"SSL_accept",   NULL},
   {"SSL_connect",   NULL},
   {"SSL_read",   NULL},
   {"SSL_write",   NULL},
   {"SSL_get_error",  NULL},
   {"SSL_set_fd",   NULL},
   {"SSL_new",   NULL},
   {"SSL_CTX_new",   NULL},
   {"SSLv23_server_method", NULL},
   {"SSL_library_init",  NULL},
   {"SSL_CTX_use_PrivateKey_file", NULL},
   {"SSL_CTX_use_certificate_file",NULL},
   {"SSL_CTX_set_default_passwd_cb",NULL},
   {"SSL_CTX_free",  NULL},
   {"SSL_load_error_strings", NULL},
   {"SSL_CTX_use_certificate_chain_file", NULL},
   {"SSLv23_client_method", NULL},
   {NULL,    NULL}
 };
 // Similar array as ssl_sw. These functions could be located in different lib.
 #if !defined(NO_SSL)
 static struct ssl_func crypto_sw[] = {
   {"CRYPTO_num_locks",  NULL},
   {"CRYPTO_set_locking_callback", NULL},
   {"CRYPTO_set_id_callback", NULL},
   {"ERR_get_error",  NULL},
   {"ERR_error_string", NULL},
   {NULL,    NULL}
 };
 #endif // NO_SSL
 #endif // NO_SSL_DL
 #ifndef MG_INTERNAL
 #define MG_INTERNAL static
 #endif
 static const char *month_names[] = {
   "Jan", "Feb", "Mar", "Apr", "May", "Jun",
   "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
 };
 #if !defined(MG_MGR_EV_MGR)
 /*
  * Switches between different methods of handling sockets. Supported values:
  * 0 - select()
  * 1 - epoll() (Linux only)
  */
 #define MG_MGR_EV_MGR 0 /* select() */
 #endif
 // Unified socket address. For IPv6 support, add IPv6 address structure
 // in the union u.
 union usa {
   struct sockaddr sa;
   struct sockaddr_in sin;
 #if defined(USE_IPV6)
   struct sockaddr_in6 sin6;
 #ifdef PICOTCP
 #define NO_LIBC
 #define MG_DISABLE_FILESYSTEM
 #define MG_DISABLE_POPEN
 #define MG_DISABLE_CGI
 #define MG_DISABLE_DIRECTORY_LISTING
 #define MG_DISABLE_SOCKETPAIR
 #define MG_DISABLE_PFS
 #endif
 };
 // Describes a string (chunk of memory).
 struct vec {
   const char *ptr;
   size_t len;
 };
 /* Amalgamated: #include "../mongoose.h" */
 // Structure used by mg_stat() function. Uses 64 bit file length.
 struct mgstat {
   int is_directory;  // Directory marker
   int64_t size;      // File size
   time_t mtime;      // Modification time
 };
 /* internals that need to be accessible in unit tests */
 MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc,
                                                 int proto,
                                                 union socket_address *sa);
 // Describes listening socket, or socket which was accept()-ed by the master
 // thread and queued for future handling by the worker thread.
 struct socket {
   struct socket *next;  // Linkage
   SOCKET sock;          // Listening socket
   union usa lsa;        // Local socket address
   union usa rsa;        // Remote socket address
   int is_ssl;           // Is socket SSL-ed
 };
 MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa,
                                  int *proto, char *host, size_t host_len);
 MG_INTERNAL void mg_call(struct mg_connection *nc,
                          mg_event_handler_t ev_handler, int ev, void *ev_data);
 MG_INTERNAL void mg_forward(struct mg_connection *, struct mg_connection *);
 MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c);
 MG_INTERNAL void mg_remove_conn(struct mg_connection *c);
 // NOTE(lsm): this enum shoulds be in sync with the config_options below.
 enum {
   CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
   MAX_REQUEST_SIZE, PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS,
   ACCESS_LOG_FILE, SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
   GLOBAL_PASSWORDS_FILE, INDEX_FILES, ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST,
   EXTRA_MIME_TYPES, LISTENING_PORTS, DOCUMENT_ROOT, SSL_CERTIFICATE,
   NUM_THREADS, RUN_AS_USER, REWRITE, HIDE_FILES,
   NUM_OPTIONS
 };
 #ifndef MG_DISABLE_FILESYSTEM
 MG_INTERNAL int find_index_file(char *, size_t, const char *, cs_stat_t *);
 #endif
 static const char *config_options[] = {
   "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$",
   "E", "cgi_environment", NULL,
   "G", "put_delete_passwords_file", NULL,
   "I", "cgi_interpreter", NULL,
   "M", "max_request_size", "16384",
   "P", "protect_uri", NULL,
   "R", "authentication_domain", "mydomain.com",
   "S", "ssi_pattern", "**.shtml$|**.shtm$",
   "a", "access_log_file", NULL,
   "c", "ssl_chain_file", NULL,
   "d", "enable_directory_listing", "yes",
   "e", "error_log_file", NULL,
   "g", "global_passwords_file", NULL,
   "i", "index_files", "index.html,index.htm,index.cgi,index.shtml,index.php",
   "k", "enable_keep_alive", "no",
   "l", "access_control_list", NULL,
   "m", "extra_mime_types", NULL,
   "p", "listening_ports", "8080",
   "r", "document_root",  ".",
   "s", "ssl_certificate", NULL,
   "t", "num_threads", "10",
   "u", "run_as_user", NULL,
   "w", "url_rewrite_patterns", NULL,
   "x", "hide_files_patterns", NULL,
   NULL
 };
 #define ENTRIES_PER_CONFIG_OPTION 3
 struct mg_context {
   volatile int stop_flag;       // Should we stop event loop
   SSL_CTX *ssl_ctx;             // SSL context
   SSL_CTX *client_ssl_ctx;      // Client SSL context
   char *config[NUM_OPTIONS];    // Mongoose configuration parameters
   mg_callback_t user_callback;  // User-defined callback function
   void *user_data;              // User-defined data
   struct socket *listening_sockets;
   volatile int num_threads;  // Number of threads
   pthread_mutex_t mutex;     // Protects (max|num)_threads
   pthread_cond_t  cond;      // Condvar for tracking workers terminations
   struct socket queue[20];   // Accepted sockets
   volatile int sq_head;      // Head of the socket queue
   volatile int sq_tail;      // Tail of the socket queue
   pthread_cond_t sq_full;    // Signaled when socket is produced
   pthread_cond_t sq_empty;   // Signaled when socket is consumed
 };
 #ifdef _WIN32
 void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len);
 #endif
 struct mg_connection {
   struct mg_request_info request_info;
   struct mg_context *ctx;
   SSL *ssl;                   // SSL descriptor
   struct socket client;       // Connected client
   time_t birth_time;          // Time when request was received
   int64_t num_bytes_sent;     // Total bytes sent to client
   int64_t content_len;        // Content-Length header value
   int64_t consumed_content;   // How many bytes of content have been read
   char *buf;                  // Buffer for received data
   char *path_info;            // PATH_INFO part of the URL
   char *body;                 // Pointer to not-read yet buffered body data
   char *next_request;         // Pointer to the buffered next request
   int must_close;             // 1 if connection must be closed
   int buf_size;               // Buffer size
   int request_len;            // Size of the request + headers in a buffer
   int data_len;               // Total size of data in a buffer
 };
 /*
  * Reassemble the content of the buffer (buf, blen) which should be
  * in the HTTP chunked encoding, by collapsing data chunks to the
  * beginning of the buffer.
+ *
  * If chunks get reassembled, modify hm->body to point to the reassembled
  * body and fire MG_EV_HTTP_CHUNK event. If handler sets MG_F_DELETE_CHUNK
  * in nc->flags, delete reassembled body from the mbuf.
+ *
  * Return reassembled body size.
  */
 MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc,
                                      struct http_message *hm, char *buf,
                                      size_t blen);
 #ifndef MG_DISABLE_FILESYSTEM
 MG_INTERNAL time_t mg_parse_date_string(const char *datetime);
 MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st);
 #endif
 const char **mg_get_valid_option_names(void) {
   return config_options;
+}
 /* Forward declarations for testing. */
 extern void *(*test_malloc)(size_t);
 extern void *(*test_calloc)(size_t, size_t);
 static void *call_user(struct mg_connection *conn, enum mg_event event) {
   conn->request_info.user_data = conn->ctx->user_data;
   return conn->ctx->user_callback == NULL ? NULL :
     conn->ctx->user_callback(event, conn);
+}
 #endif /* MG_INTERNAL_HEADER_INCLUDED */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/base64.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 static int get_option_index(const char *name) {
   int i;
 #ifndef EXCLUDE_COMMON
   for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
     if (strcmp(config_options[i], name) == 0 ||
         strcmp(config_options[i + 1], name) == 0) {
       return i / ENTRIES_PER_CONFIG_OPTION;
+    }
+  }
   return -1;
+}
 /* Amalgamated: #include "base64.h" */
 #include <string.h>
 const char *mg_get_option(const struct mg_context *ctx, const char *name) {
   int i;
   if ((i = get_option_index(name)) == -1) {
     return NULL;
   } else if (ctx->config[i] == NULL) {
     return "";
 /* ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ */
 #define NUM_UPPERCASES ('Z' - 'A' + 1)
 #define NUM_LETTERS (NUM_UPPERCASES * 2)
 #define NUM_DIGITS ('9' - '0' + 1)
 /*
  * Emit a base64 code char.
+ *
  * Doesn't use memory, thus it's safe to use to safely dump memory in crashdumps
  */
 static void cs_base64_emit_code(struct cs_base64_ctx *ctx, int v) {
   if (v < NUM_UPPERCASES) {
     ctx->b64_putc(v + 'A', ctx->user_data);
   } else if (v < (NUM_LETTERS)) {
     ctx->b64_putc(v - NUM_UPPERCASES + 'a', ctx->user_data);
   } else if (v < (NUM_LETTERS + NUM_DIGITS)) {
     ctx->b64_putc(v - NUM_LETTERS + '0', ctx->user_data);
   } else {
     return ctx->config[i];
     ctx->b64_putc(v - NUM_LETTERS - NUM_DIGITS == 0 ? '+' : '/',
                   ctx->user_data);
+  }
+}
 static void sockaddr_to_string(char *buf, size_t len,
                                      const union usa *usa) {
   buf[0] = '\0';
 #if defined(USE_IPV6)
   inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
             (void *) &usa->sin.sin_addr :
             (void *) &usa->sin6.sin6_addr, buf, len);
 #elif defined(_WIN32)
   // Only Windoze Vista (and newer) have inet_ntop()
   strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
 #else
   inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
 #endif
+}
 // Print error message to the opened error log stream.
 static void cry(struct mg_connection *conn, const char *fmt, ...) {
   char buf[MG_BUF_LEN], src_addr[20];
   va_list ap;
   FILE *fp;
   time_t timestamp;
   va_start(ap, fmt);
   (void) vsnprintf(buf, sizeof(buf), fmt, ap);
   va_end(ap);
   // Do not lock when getting the callback value, here and below.
   // I suppose this is fine, since function cannot disappear in the
   // same way string option can.
   conn->request_info.log_message = buf;
   if (call_user(conn, MG_EVENT_LOG) == NULL) {
     fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
       mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
     if (fp != NULL) {
       flockfile(fp);
       timestamp = time(NULL);
       sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
       fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
               src_addr);
 static void cs_base64_emit_chunk(struct cs_base64_ctx *ctx) {
   int a, b, c;
       if (conn->request_info.request_method != NULL) {
         fprintf(fp, "%s %s: ", conn->request_info.request_method,
                 conn->request_info.uri);
+      }
   a = ctx->chunk[0];
   b = ctx->chunk[1];
   c = ctx->chunk[2];
       (void) fprintf(fp, "%s", buf);
       fputc('\n', fp);
       funlockfile(fp);
       if (fp != stderr) {
         fclose(fp);
   cs_base64_emit_code(ctx, a >> 2);
   cs_base64_emit_code(ctx, ((a & 3) << 4) | (b >> 4));
   if (ctx->chunk_size > 1) {
     cs_base64_emit_code(ctx, (b & 15) << 2 | (c >> 6));
+  }
   if (ctx->chunk_size > 2) {
     cs_base64_emit_code(ctx, c & 63);
+  }
+}
   conn->request_info.log_message = NULL;
+}
 // Return fake connection structure. Used for logging, if connection
 // is not applicable at the moment of logging.
 static struct mg_connection *fc(struct mg_context *ctx) {
   static struct mg_connection fake_connection;
   fake_connection.ctx = ctx;
   return &fake_connection;
+}
 const char *mg_version(void) {
   return MONGOOSE_VERSION;
+}
 const struct mg_request_info *
 mg_get_request_info(const struct mg_connection *conn) {
   return &conn->request_info;
 void cs_base64_init(struct cs_base64_ctx *ctx, cs_base64_putc_t b64_putc,
                     void *user_data) {
   ctx->chunk_size = 0;
   ctx->b64_putc = b64_putc;
   ctx->user_data = user_data;
+}
 static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
   for (; *src != '\0' && n > 1; n--) {
     *dst++ = *src++;
 void cs_base64_update(struct cs_base64_ctx *ctx, const char *str, size_t len) {
   const unsigned char *src = (const unsigned char *) str;
   size_t i;
   for (i = 0; i < len; i++) {
     ctx->chunk[ctx->chunk_size++] = src[i];
     if (ctx->chunk_size == 3) {
       cs_base64_emit_chunk(ctx);
       ctx->chunk_size = 0;
+    }
   *dst = '\0';
+  }
 static int lowercase(const char *s) {
   return tolower(* (const unsigned char *) s);
+}
 static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
   int diff = 0;
 void cs_base64_finish(struct cs_base64_ctx *ctx) {
   if (ctx->chunk_size > 0) {
     int i;
     memset(&ctx->chunk[ctx->chunk_size], 0, 3 - ctx->chunk_size);
     cs_base64_emit_chunk(ctx);
     for (i = 0; i < (3 - ctx->chunk_size); i++) {
       ctx->b64_putc('=', ctx->user_data);
+    }
+  }
+}
 #define BASE64_ENCODE_BODY                                                \
   static const char *b64 =                                                \
       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; \
   int i, j, a, b, c;                                                      \
+                                                                          \
   for (i = j = 0; i < src_len; i += 3) {                                  \
     a = src[i];                                                           \
     b = i + 1 >= src_len ? 0 : src[i + 1];                                \
     c = i + 2 >= src_len ? 0 : src[i + 2];                                \
+                                                                          \
     BASE64_OUT(b64[a >> 2]);                                              \
     BASE64_OUT(b64[((a & 3) << 4) | (b >> 4)]);                           \
     if (i + 1 < src_len) {                                                \
       BASE64_OUT(b64[(b & 15) << 2 | (c >> 6)]);                          \
     }                                                                     \
     if (i + 2 < src_len) {                                                \
       BASE64_OUT(b64[c & 63]);                                            \
     }                                                                     \
   }                                                                       \
+                                                                          \
   while (j % 4 != 0) {                                                    \
     BASE64_OUT('=');                                                      \
   }                                                                       \
   BASE64_FLUSH()
 #define BASE64_OUT(ch) \
   do {                 \
     dst[j++] = (ch);   \
   } while (0)
   if (len > 0)
     do {
       diff = lowercase(s1++) - lowercase(s2++);
     } while (diff == 0 && s1[-1] != '\0' && --len > 0);
 #define BASE64_FLUSH() \
   do {                 \
     dst[j++] = '\0';   \
   } while (0)
   return diff;
 void cs_base64_encode(const unsigned char *src, int src_len, char *dst) {
   BASE64_ENCODE_BODY;
+}
 static int mg_strcasecmp(const char *s1, const char *s2) {
   int diff;
 #undef BASE64_OUT
 #undef BASE64_FLUSH
   do {
     diff = lowercase(s1++) - lowercase(s2++);
   } while (diff == 0 && s1[-1] != '\0');
 #define BASE64_OUT(ch)      \
   do {                      \
     fprintf(f, "%c", (ch)); \
     j++;                    \
   } while (0)
   return diff;
+}
 #define BASE64_FLUSH()
 void cs_fprint_base64(FILE *f, const unsigned char *src, int src_len) {
   BASE64_ENCODE_BODY;
+}
 #undef BASE64_OUT
 #undef BASE64_FLUSH
 /* Convert one byte of encoded base64 input stream to 6-bit chunk */
 static unsigned char from_b64(unsigned char ch) {
   /* Inverse lookup map */
   static const unsigned char tab[128] = {
 , 255, 255, 255,
 , 255, 255, 255, /*  0 */
 , 255, 255, 255,
 , 255, 255, 255, /*  8 */
 , 255, 255, 255,
 , 255, 255, 255, /*  16 */
 , 255, 255, 255,
 , 255, 255, 255, /*  24 */
 , 255, 255, 255,
 , 255, 255, 255, /*  32 */
 , 255, 255, 62,
 , 255, 255, 63, /*  40 */
 ,  53,  54,  55,
 ,  57,  58,  59, /*  48 */
 ,  61,  255, 255,
 , 200, 255, 255, /*  56   '=' is 200, on index 61 */
 , 0,   1,   2,
 ,   4,   5,   6, /*  64 */
 ,   8,   9,   10,
 ,  12,  13,  14, /*  72 */
 ,  16,  17,  18,
 ,  20,  21,  22, /*  80 */
 ,  24,  25,  255,
 , 255, 255, 255, /*  88 */
 , 26,  27,  28,
 ,  30,  31,  32, /*  96 */
 ,  34,  35,  36,
 ,  38,  39,  40, /*  104 */
 ,  42,  43,  44,
 ,  46,  47,  48, /*  112 */
 ,  50,  51,  255,
 , 255, 255, 255, /*  120 */
   };
   return tab[ch & 127];
+}
 int cs_base64_decode(const unsigned char *s, int len, char *dst) {
   unsigned char a, b, c, d;
   int orig_len = len;
   while (len >= 4 && (a = from_b64(s[0])) != 255 &&
          (b = from_b64(s[1])) != 255 && (c = from_b64(s[2])) != 255 &&
          (d = from_b64(s[3])) != 255) {
     s += 4;
     len -= 4;
     if (a == 200 || b == 200) break; /* '=' can't be there */
     *dst++ = a << 2 | b >> 4;
     if (c == 200) break;
     *dst++ = b << 4 | c >> 2;
     if (d == 200) break;
     *dst++ = c << 6 | d;
+  }
   *dst = 0;
   return orig_len - len;
+}
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/cs_dbg.c"
 /**/
 #endif
 /* Amalgamated: #include "cs_dbg.h" */
 static char * mg_strndup(const char *ptr, size_t len) {
   char *p;
 #include <stdarg.h>
 #include <stdio.h>
   if ((p = (char *) malloc(len + 1)) != NULL) {
     mg_strlcpy(p, ptr, len + 1);
+  }
 enum cs_log_level s_cs_log_level =
 #ifdef CS_ENABLE_DEBUG
     LL_DEBUG;
 #else
     LL_ERROR;
 #endif
   return p;
 void cs_log_printf(const char *fmt, ...) {
   va_list ap;
   va_start(ap, fmt);
   vfprintf(stderr, fmt, ap);
   va_end(ap);
   fputc('\n', stderr);
   fflush(stderr);
+}
 static char * mg_strdup(const char *str) {
   return mg_strndup(str, strlen(str));
 void cs_log_set_level(enum cs_log_level level) {
   s_cs_log_level = level;
+}
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/dirent.c"
 /**/
 #endif
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  */
 // Like snprintf(), but never returns negative value, or a value
 // that is larger than a supplied buffer.
 // Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
 // in his audit report.
 static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
                         const char *fmt, va_list ap) {
   int n;
 #ifndef EXCLUDE_COMMON
   if (buflen == 0)
     return 0;
 /* Amalgamated: #include "osdep.h" */
 /*
  * This file contains POSIX opendir/closedir/readdir API implementation
  * for systems which do not natively support it (e.g. Windows).
  */
 #ifndef MG_FREE
 #define MG_FREE free
 #endif
   n = vsnprintf(buf, buflen, fmt, ap);
 #ifndef MG_MALLOC
 #define MG_MALLOC malloc
 #endif
 #ifdef _WIN32
 DIR *opendir(const char *name) {
   DIR *dir = NULL;
   wchar_t wpath[MAX_PATH];
   DWORD attrs;
   if (n < 0) {
     cry(conn, "vsnprintf error");
     n = 0;
   } else if (n >= (int) buflen) {
     cry(conn, "truncating vsnprintf buffer: [%.*s]",
         n > 200 ? 200 : n, buf);
     n = (int) buflen - 1;
   if (name == NULL) {
     SetLastError(ERROR_BAD_ARGUMENTS);
   } else if ((dir = (DIR *) MG_MALLOC(sizeof(*dir))) == NULL) {
     SetLastError(ERROR_NOT_ENOUGH_MEMORY);
   } else {
     to_wchar(name, wpath, ARRAY_SIZE(wpath));
     attrs = GetFileAttributesW(wpath);
     if (attrs != 0xFFFFFFFF && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
       (void) wcscat(wpath, L"\\*");
       dir->handle = FindFirstFileW(wpath, &dir->info);
       dir->result.d_name[0] = '\0';
     } else {
       MG_FREE(dir);
       dir = NULL;
+    }
+  }
   buf[n] = '\0';
-  return n;
+  return dir;
+}
 static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
                        const char *fmt, ...) {
   va_list ap;
   int n;
 int closedir(DIR *dir) {
   int result = 0;
   va_start(ap, fmt);
   n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
   va_end(ap);
   if (dir != NULL) {
     if (dir->handle != INVALID_HANDLE_VALUE)
       result = FindClose(dir->handle) ? 0 : -1;
     MG_FREE(dir);
   } else {
     result = -1;
     SetLastError(ERROR_BAD_ARGUMENTS);
+  }
-  return n;
+  return result;
+}
 // Skip the characters until one of the delimiters characters found.
 // 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
 // Advance pointer to buffer to the next word. Return found 0-terminated word.
 // Delimiters can be quoted with quotechar.
 static char *skip_quoted(char **buf, const char *delimiters,
                          const char *whitespace, char quotechar) {
   char *p, *begin_word, *end_word, *end_whitespace;
 struct dirent *readdir(DIR *dir) {
   struct dirent *result = 0;
   begin_word = *buf;
   end_word = begin_word + strcspn(begin_word, delimiters);
   if (dir) {
     if (dir->handle != INVALID_HANDLE_VALUE) {
       result = &dir->result;
       (void) WideCharToMultiByte(CP_UTF8, 0, dir->info.cFileName, -1,
                                  result->d_name, sizeof(result->d_name), NULL,
                                  NULL);
   // Check for quotechar
   if (end_word > begin_word) {
     p = end_word - 1;
     while (*p == quotechar) {
       // If there is anything beyond end_word, copy it
       if (*end_word == '\0') {
         *p = '\0';
         break;
       } else {
         size_t end_off = strcspn(end_word + 1, delimiters);
         memmove (p, end_word, end_off + 1);
         p += end_off; // p must correspond to end_word - 1
         end_word += end_off + 1;
       if (!FindNextFileW(dir->handle, &dir->info)) {
         (void) FindClose(dir->handle);
         dir->handle = INVALID_HANDLE_VALUE;
+      }
     } else {
       SetLastError(ERROR_FILE_NOT_FOUND);
+    }
     for (p++; p < end_word; p++) {
       *p = '\0';
   } else {
     SetLastError(ERROR_BAD_ARGUMENTS);
+  }
   return result;
+}
 #endif
   if (*end_word == '\0') {
     *buf = end_word;
   } else {
     end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../deps/frozen/frozen.c"
 /**/
 #endif
 /*
  * Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
  * Copyright (c) 2013 Cesanta Software Limited
  * All rights reserved
+ *
  * This library is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http: *www.gnu.org/licenses/>.
+ *
  * You are free to use this library under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this library under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 #define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005+ */
     for (p = end_word; p < end_whitespace; p++) {
       *p = '\0';
+    }
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 /* Amalgamated: #include "frozen.h" */
     *buf = end_whitespace;
+  }
 #ifdef _WIN32
 #define snprintf _snprintf
 #endif
   return begin_word;
+}
 #ifndef FROZEN_REALLOC
 #define FROZEN_REALLOC realloc
 #endif
 // Simplified version of skip_quoted without quote char
 // and whitespace == delimiters
 static char *skip(char **buf, const char *delimiters) {
   return skip_quoted(buf, delimiters, delimiters, 0);
+}
 #ifndef FROZEN_FREE
 #define FROZEN_FREE free
 #endif
 struct frozen {
   const char *end;
   const char *cur;
   struct json_token *tokens;
   int max_tokens;
   int num_tokens;
   int do_realloc;
 };
 // Return HTTP header value, or NULL if not found.
 static const char *get_header(const struct mg_request_info *ri,
                               const char *name) {
   int i;
 static int parse_object(struct frozen *f);
 static int parse_value(struct frozen *f);
   for (i = 0; i < ri->num_headers; i++)
     if (!mg_strcasecmp(name, ri->http_headers[i].name))
       return ri->http_headers[i].value;
 #define EXPECT(cond, err_code) do { if (!(cond)) return (err_code); } while (0)
 #define TRY(expr) do { int _n = expr; if (_n < 0) return _n; } while (0)
 #define END_OF_STRING (-1)
   return NULL;
 static int left(const struct frozen *f) {
   return f->end - f->cur;
+}
 const char *mg_get_header(const struct mg_connection *conn, const char *name) {
   return get_header(&conn->request_info, name);
 static int is_space(int ch) {
   return ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n';
+}
 // A helper function for traversing a comma separated list of values.
 // It returns a list pointer shifted to the next value, or NULL if the end
 // of the list found.
 // Value is stored in val vector. If value has form "x=y", then eq_val
 // vector is initialized to point to the "y" part, and val vector length
 // is adjusted to point only to "x".
 static const char *next_option(const char *list, struct vec *val,
                                struct vec *eq_val) {
   if (list == NULL || *list == '\0') {
     // End of the list
     list = NULL;
   } else {
     val->ptr = list;
     if ((list = strchr(val->ptr, ',')) != NULL) {
       // Comma found. Store length and shift the list ptr
       val->len = list - val->ptr;
       list++;
     } else {
       // This value is the last one
       list = val->ptr + strlen(val->ptr);
       val->len = list - val->ptr;
 static void skip_whitespaces(struct frozen *f) {
   while (f->cur < f->end && is_space(*f->cur)) f->cur++;
+}
     if (eq_val != NULL) {
       // Value has form "x=y", adjust pointers and lengths
       // so that val points to "x", and eq_val points to "y".
       eq_val->len = 0;
       eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
       if (eq_val->ptr != NULL) {
         eq_val->ptr++;  // Skip over '=' character
         eq_val->len = val->ptr + val->len - eq_val->ptr;
         val->len = (eq_val->ptr - val->ptr) - 1;
+      }
+    }
 static int cur(struct frozen *f) {
   skip_whitespaces(f);
   return f->cur >= f->end ? END_OF_STRING : * (unsigned char *) f->cur;
+}
   return list;
 static int test_and_skip(struct frozen *f, int expected) {
   int ch = cur(f);
   if (ch == expected) { f->cur++; return 0; }
   return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+}
 static int match_prefix(const char *pattern, int pattern_len, const char *str) {
   const char *or_str;
   int i, j, len, res;
 static int is_alpha(int ch) {
   return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
+}
   if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
     res = match_prefix(pattern, or_str - pattern, str);
     return res > 0 ? res :
         match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
 static int is_digit(int ch) {
   return ch >= '0' && ch <= '9';
+}
   i = j = 0;
   res = -1;
   for (; i < pattern_len; i++, j++) {
     if (pattern[i] == '?' && str[j] != '\0') {
       continue;
     } else if (pattern[i] == '$') {
       return str[j] == '\0' ? j : -1;
     } else if (pattern[i] == '*') {
       i++;
       if (pattern[i] == '*') {
         i++;
         len = (int) strlen(str + j);
       } else {
         len = (int) strcspn(str + j, "/");
 static int is_hex_digit(int ch) {
   return is_digit(ch) || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
+}
       if (i == pattern_len) {
         return j + len;
 static int get_escape_len(const char *s, int len) {
   switch (*s) {
     case 'u':
       return len < 6 ? JSON_STRING_INCOMPLETE :
         is_hex_digit(s[1]) && is_hex_digit(s[2]) &&
         is_hex_digit(s[3]) && is_hex_digit(s[4]) ? 5 : JSON_STRING_INVALID;
     case '"': case '\\': case '/': case 'b':
     case 'f': case 'n': case 'r': case 't':
       return len < 2 ? JSON_STRING_INCOMPLETE : 1;
     default:
       return JSON_STRING_INVALID;
+  }
       do {
         res = match_prefix(pattern + i, pattern_len - i, str + j + len);
       } while (res == -1 && len-- > 0);
       return res == -1 ? -1 : j + res + len;
     } else if (pattern[i] != str[j]) {
       return -1;
+}
 static int capture_ptr(struct frozen *f, const char *ptr, enum json_type type) {
   if (f->do_realloc && f->num_tokens >= f->max_tokens) {
     int new_size = f->max_tokens == 0 ? 100 : f->max_tokens * 2;
     void *p = FROZEN_REALLOC(f->tokens, new_size * sizeof(f->tokens[0]));
     if (p == NULL) return JSON_TOKEN_ARRAY_TOO_SMALL;
     f->max_tokens = new_size;
     f->tokens = (struct json_token *) p;
+  }
   return j;
   if (f->tokens == NULL || f->max_tokens == 0) return 0;
   if (f->num_tokens >= f->max_tokens) return JSON_TOKEN_ARRAY_TOO_SMALL;
   f->tokens[f->num_tokens].ptr = ptr;
   f->tokens[f->num_tokens].type = type;
   f->num_tokens++;
   return 0;
+}
 // HTTP 1.1 assumes keep alive if "Connection:" header is not set
 // This function must tolerate situations when connection info is not
 // set up, for example if request parsing failed.
 static int should_keep_alive(const struct mg_connection *conn) {
   const char *http_version = conn->request_info.http_version;
   const char *header = mg_get_header(conn, "Connection");
   if (conn->must_close ||
       conn->request_info.status_code == 401 ||
       mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 ||
       (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) ||
       (header == NULL && http_version && strcmp(http_version, "1.1"))) {
 static int capture_len(struct frozen *f, int token_index, const char *ptr) {
   if (f->tokens == 0 || f->max_tokens == 0) return 0;
   EXPECT(token_index >= 0 && token_index < f->max_tokens, JSON_STRING_INVALID);
   f->tokens[token_index].len = ptr - f->tokens[token_index].ptr;
   f->tokens[token_index].num_desc = (f->num_tokens - 1) - token_index;
   return 0;
+}
   return 1;
 /* identifier = letter { letter | digit | '_' } */
 static int parse_identifier(struct frozen *f) {
   EXPECT(is_alpha(cur(f)), JSON_STRING_INVALID);
   TRY(capture_ptr(f, f->cur, JSON_TYPE_STRING));
   while (f->cur < f->end &&
          (*f->cur == '_' || is_alpha(*f->cur) || is_digit(*f->cur))) {
     f->cur++;
+  }
   capture_len(f, f->num_tokens - 1, f->cur);
   return 0;
+}
 static const char *suggest_connection_header(const struct mg_connection *conn) {
   return should_keep_alive(conn) ? "keep-alive" : "close";
 static int get_utf8_char_len(unsigned char ch) {
   if ((ch & 0x80) == 0) return 1;
   switch (ch & 0xf0) {
     case 0xf0: return 4;
     case 0xe0: return 3;
     default: return 2;
+  }
+}
 /* string = '"' { quoted_printable_chars } '"' */
 static int parse_string(struct frozen *f) {
   int n, ch = 0, len = 0;
   TRY(test_and_skip(f, '"'));
   TRY(capture_ptr(f, f->cur, JSON_TYPE_STRING));
   for (; f->cur < f->end; f->cur += len) {
     ch = * (unsigned char *) f->cur;
     len = get_utf8_char_len((unsigned char) ch);
     EXPECT(ch >= 32 && len > 0, JSON_STRING_INVALID);  /* No control chars */
     EXPECT(len < left(f), JSON_STRING_INCOMPLETE);
     if (ch == '\\') {
       EXPECT((n = get_escape_len(f->cur + 1, left(f))) > 0, n);
       len += n;
     } else if (ch == '"') {
       capture_len(f, f->num_tokens - 1, f->cur);
       f->cur++;
       break;
     };
+  }
   return ch == '"' ? 0 : JSON_STRING_INCOMPLETE;
+}
 /* number = [ '-' ] digit+ [ '.' digit+ ] [ ['e'|'E'] ['+'|'-'] digit+ ] */
 static int parse_number(struct frozen *f) {
   int ch = cur(f);
   TRY(capture_ptr(f, f->cur, JSON_TYPE_NUMBER));
   if (ch == '-') f->cur++;
   EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
   EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
   while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
   if (f->cur < f->end && f->cur[0] == '.') {
     f->cur++;
     EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
     EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
     while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
+  }
   if (f->cur < f->end && (f->cur[0] == 'e' || f->cur[0] == 'E')) {
     f->cur++;
     EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
     if ((f->cur[0] == '+' || f->cur[0] == '-')) f->cur++;
     EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
     EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
     while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
+  }
   capture_len(f, f->num_tokens - 1, f->cur);
   return 0;
+}
 static void send_http_error(struct mg_connection *, int, const char *,
                             PRINTF_FORMAT_STRING(const char *fmt), ...)
   PRINTF_ARGS(4, 5);
 /* array = '[' [ value { ',' value } ] ']' */
 static int parse_array(struct frozen *f) {
   int ind;
   TRY(test_and_skip(f, '['));
   TRY(capture_ptr(f, f->cur - 1, JSON_TYPE_ARRAY));
   ind = f->num_tokens - 1;
   while (cur(f) != ']') {
     TRY(parse_value(f));
     if (cur(f) == ',') f->cur++;
+  }
   TRY(test_and_skip(f, ']'));
   capture_len(f, ind, f->cur);
   return 0;
+}
 static int compare(const char *s, const char *str, int len) {
   int i = 0;
   while (i < len && s[i] == str[i]) i++;
   return i == len ? 1 : 0;
+}
 static void send_http_error(struct mg_connection *conn, int status,
                             const char *reason, const char *fmt, ...) {
   char buf[MG_BUF_LEN];
   va_list ap;
   int len;
 static int expect(struct frozen *f, const char *s, int len, enum json_type t) {
   int i, n = left(f);
   conn->request_info.status_code = status;
   TRY(capture_ptr(f, f->cur, t));
   for (i = 0; i < len; i++) {
     if (i >= n) return JSON_STRING_INCOMPLETE;
     if (f->cur[i] != s[i]) return JSON_STRING_INVALID;
+  }
   f->cur += len;
   TRY(capture_len(f, f->num_tokens - 1, f->cur));
   if (call_user(conn, MG_HTTP_ERROR) == NULL) {
     buf[0] = '\0';
     len = 0;
   return 0;
+}
     // Errors 1xx, 204 and 304 MUST NOT send a body
     if (status > 199 && status != 204 && status != 304) {
       len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
       buf[len++] = '\n';
 /* value = 'null' | 'true' | 'false' | number | string | array | object */
 static int parse_value(struct frozen *f) {
   int ch = cur(f);
   switch (ch) {
     case '"': TRY(parse_string(f)); break;
     case '{': TRY(parse_object(f)); break;
     case '[': TRY(parse_array(f)); break;
     case 'n': TRY(expect(f, "null", 4, JSON_TYPE_NULL)); break;
     case 't': TRY(expect(f, "true", 4, JSON_TYPE_TRUE)); break;
     case 'f': TRY(expect(f, "false", 5, JSON_TYPE_FALSE)); break;
     case '-': case '0': case '1': case '2': case '3': case '4':
     case '5': case '6': case '7': case '8': case '9':
       TRY(parse_number(f));
       break;
     default:
       return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+  }
       va_start(ap, fmt);
       len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
       va_end(ap);
   return 0;
+}
     DEBUG_TRACE(("[%s]", buf));
     mg_printf(conn, "HTTP/1.1 %d %s\r\n"
               "Content-Type: text/plain\r\n"
               "Content-Length: %d\r\n"
               "Connection: %s\r\n\r\n", status, reason, len,
               suggest_connection_header(conn));
     conn->num_bytes_sent += mg_printf(conn, "%s", buf);
 /* key = identifier | string */
 static int parse_key(struct frozen *f) {
   int ch = cur(f);
 #if 0
   printf("%s 1 [%.*s]\n", __func__, (int) (f->end - f->cur), f->cur);
 #endif
   if (is_alpha(ch)) {
     TRY(parse_identifier(f));
   } else if (ch == '"') {
     TRY(parse_string(f));
   } else {
     return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+  }
   return 0;
+}
 #if defined(_WIN32) && !defined(__SYMBIAN32__)
 static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
   unused = NULL;
   *mutex = CreateMutex(NULL, FALSE, NULL);
   return *mutex == NULL ? -1 : 0;
 /* pair = key ':' value */
 static int parse_pair(struct frozen *f) {
   TRY(parse_key(f));
   TRY(test_and_skip(f, ':'));
   TRY(parse_value(f));
   return 0;
+}
 static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
   return CloseHandle(*mutex) == 0 ? -1 : 0;
 /* object = '{' pair { ',' pair } '}' */
 static int parse_object(struct frozen *f) {
   int ind;
   TRY(test_and_skip(f, '{'));
   TRY(capture_ptr(f, f->cur - 1, JSON_TYPE_OBJECT));
   ind = f->num_tokens - 1;
   while (cur(f) != '}') {
     TRY(parse_pair(f));
     if (cur(f) == ',') f->cur++;
+  }
 static int pthread_mutex_lock(pthread_mutex_t *mutex) {
   return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
   TRY(test_and_skip(f, '}'));
   capture_len(f, ind, f->cur);
   return 0;
+}
 static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
   return ReleaseMutex(*mutex) == 0 ? -1 : 0;
 static int doit(struct frozen *f) {
   if (f->cur == 0 || f->end < f->cur) return JSON_STRING_INVALID;
   if (f->end == f->cur) return JSON_STRING_INCOMPLETE;
   TRY(parse_object(f));
   TRY(capture_ptr(f, f->cur, JSON_TYPE_EOF));
   capture_len(f, f->num_tokens, f->cur);
   return 0;
+}
 static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
   unused = NULL;
   cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
   cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
   return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
+}
 /* json = object */
 int parse_json(const char *s, int s_len, struct json_token *arr, int arr_len) {
   struct frozen frozen;
 static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
   HANDLE handles[] = {cv->signal, cv->broadcast};
   ReleaseMutex(*mutex);
   WaitForMultipleObjects(2, handles, FALSE, INFINITE);
   return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
+}
   memset(&frozen, 0, sizeof(frozen));
   frozen.end = s + s_len;
   frozen.cur = s;
   frozen.tokens = arr;
   frozen.max_tokens = arr_len;
 static int pthread_cond_signal(pthread_cond_t *cv) {
   return SetEvent(cv->signal) == 0 ? -1 : 0;
+}
   TRY(doit(&frozen));
 static int pthread_cond_broadcast(pthread_cond_t *cv) {
   // Implementation with PulseEvent() has race condition, see
   // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
   return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
   return frozen.cur - s;
+}
 static int pthread_cond_destroy(pthread_cond_t *cv) {
   return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
+}
 struct json_token *parse_json2(const char *s, int s_len) {
   struct frozen frozen;
 // For Windows, change all slashes to backslashes in path names.
 static void change_slashes_to_backslashes(char *path) {
   int i;
   memset(&frozen, 0, sizeof(frozen));
   frozen.end = s + s_len;
   frozen.cur = s;
   frozen.do_realloc = 1;
   for (i = 0; path[i] != '\0'; i++) {
     if (path[i] == '/')
       path[i] = '\\';
     // i > 0 check is to preserve UNC paths, like \\server\file.txt
     if (path[i] == '\\' && i > 0)
       while (path[i + 1] == '\\' || path[i + 1] == '/')
         (void) memmove(path + i + 1,
             path + i + 2, strlen(path + i + 1));
   if (doit(&frozen) < 0) {
     FROZEN_FREE((void *) frozen.tokens);
     frozen.tokens = NULL;
+  }
   return frozen.tokens;
+}
 // Encode 'path' which is assumed UTF-8 string, into UNICODE string.
 // wbuf and wbuf_len is a target buffer and its length.
 static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
   char buf[PATH_MAX], buf2[PATH_MAX], *p;
 static int path_part_len(const char *p) {
   int i = 0;
   while (p[i] != '\0' && p[i] != '[' && p[i] != '.') i++;
   return i;
+}
   mg_strlcpy(buf, path, sizeof(buf));
   change_slashes_to_backslashes(buf);
 struct json_token *find_json_token(struct json_token *toks, const char *path) {
   while (path != 0 && path[0] != '\0') {
     int i, ind2 = 0, ind = -1, skip = 2, n = path_part_len(path);
     if (path[0] == '[') {
       if (toks->type != JSON_TYPE_ARRAY || !is_digit(path[1])) return 0;
       for (ind = 0, n = 1; path[n] != ']' && path[n] != '\0'; n++) {
         if (!is_digit(path[n])) return 0;
         ind *= 10;
         ind += path[n] - '0';
+      }
       if (path[n++] != ']') return 0;
       skip = 1;  /* In objects, we skip 2 elems while iterating, in arrays 1. */
     } else if (toks->type != JSON_TYPE_OBJECT) return 0;
     toks++;
     for (i = 0; i < toks[-1].num_desc; i += skip, ind2++) {
       /* ind == -1 indicated that we're iterating an array, not object */
       if (ind == -1 && toks[i].type != JSON_TYPE_STRING) return 0;
       if (ind2 == ind ||
           (ind == -1 && toks[i].len == n && compare(path, toks[i].ptr, n))) {
         i += skip - 1;
         break;
       };
       if (toks[i - 1 + skip].type == JSON_TYPE_ARRAY ||
           toks[i - 1 + skip].type == JSON_TYPE_OBJECT) {
         i += toks[i - 1 + skip].num_desc;
+      }
+    }
     if (i == toks[-1].num_desc) return 0;
     path += n;
     if (path[0] == '.') path++;
     if (path[0] == '\0') return &toks[i];
     toks += i;
+  }
   return 0;
+}
 int json_emit_long(char *buf, int buf_len, long int value) {
   char tmp[20];
   int n = snprintf(tmp, sizeof(tmp), "%ld", value);
   strncpy(buf, tmp, buf_len > 0 ? buf_len : 0);
   return n;
+}
 int json_emit_double(char *buf, int buf_len, double value) {
   char tmp[20];
   int n = snprintf(tmp, sizeof(tmp), "%g", value);
   strncpy(buf, tmp, buf_len > 0 ? buf_len : 0);
   return n;
+}
 int json_emit_quoted_str(char *s, int s_len, const char *str, int len) {
   const char *begin = s, *end = s + s_len, *str_end = str + len;
   char ch;
 #define EMIT(x) do { if (s < end) *s = x; s++; } while (0)
   EMIT('"');
   while (str < str_end) {
     ch = *str++;
     switch (ch) {
       case '"':  EMIT('\\'); EMIT('"'); break;
       case '\\': EMIT('\\'); EMIT('\\'); break;
       case '\b': EMIT('\\'); EMIT('b'); break;
       case '\f': EMIT('\\'); EMIT('f'); break;
       case '\n': EMIT('\\'); EMIT('n'); break;
       case '\r': EMIT('\\'); EMIT('r'); break;
       case '\t': EMIT('\\'); EMIT('t'); break;
       default: EMIT(ch);
+    }
+  }
   EMIT('"');
   if (s < end) {
     *s = '\0';
+  }
   return s - begin;
+}
 int json_emit_unquoted_str(char *buf, int buf_len, const char *str, int len) {
   if (buf_len > 0 && len > 0) {
     int n = len < buf_len ? len : buf_len;
     memcpy(buf, str, n);
     if (n < buf_len) {
       buf[n] = '\0';
+    }
+  }
   return len;
+}
 int json_emit_va(char *s, int s_len, const char *fmt, va_list ap) {
   const char *end = s + s_len, *str, *orig = s;
   size_t len;
   while (*fmt != '\0') {
     switch (*fmt) {
       case '[': case ']': case '{': case '}': case ',': case ':':
       case ' ': case '\r': case '\n': case '\t':
         if (s < end) {
           *s = *fmt;
+        }
         s++;
         break;
       case 'i':
         s += json_emit_long(s, end - s, va_arg(ap, long));
         break;
       case 'f':
         s += json_emit_double(s, end - s, va_arg(ap, double));
         break;
       case 'v':
         str = va_arg(ap, char *);
         len = va_arg(ap, size_t);
         s += json_emit_quoted_str(s, end - s, str, len);
         break;
       case 'V':
         str = va_arg(ap, char *);
         len = va_arg(ap, size_t);
         s += json_emit_unquoted_str(s, end - s, str, len);
         break;
       case 's':
         str = va_arg(ap, char *);
         s += json_emit_quoted_str(s, end - s, str, strlen(str));
         break;
       case 'S':
         str = va_arg(ap, char *);
         s += json_emit_unquoted_str(s, end - s, str, strlen(str));
         break;
       case 'T':
         s += json_emit_unquoted_str(s, end - s, "true", 4);
         break;
       case 'F':
         s += json_emit_unquoted_str(s, end - s, "false", 5);
         break;
       case 'N':
         s += json_emit_unquoted_str(s, end - s, "null", 4);
         break;
       default:
         return 0;
+    }
     fmt++;
+  }
   /* Best-effort to 0-terminate generated string */
   if (s < end) {
     *s = '\0';
+  }
   return s - orig;
+}
 int json_emit(char *buf, int buf_len, const char *fmt, ...) {
   int len;
   va_list ap;
   va_start(ap, fmt);
   len = json_emit_va(buf, buf_len, fmt, ap);
   va_end(ap);
   return len;
+}
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/md5.c"
 /**/
 #endif
 /*
  * This code implements the MD5 message-digest algorithm.
  * The algorithm is due to Ron Rivest.  This code was
  * written by Colin Plumb in 1993, no copyright is claimed.
  * This code is in the public domain; do with it what you wish.
+ *
  * Equivalent code is available from RSA Data Security, Inc.
  * This code has been tested against that, and is equivalent,
  * except that you don't need to include two pages of legalese
  * with every copy.
+ *
  * To compute the message digest of a chunk of bytes, declare an
  * MD5Context structure, pass it to MD5Init, call MD5Update as
  * needed on buffers full of bytes, and then call MD5Final, which
  * will fill a supplied 16-byte array with the digest.
  */
 #if !defined(DISABLE_MD5) && !defined(EXCLUDE_COMMON)
 /* Amalgamated: #include "md5.h" */
 #ifndef CS_ENABLE_NATIVE_MD5
 static void byteReverse(unsigned char *buf, unsigned longs) {
 /* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */
 #if BYTE_ORDER == BIG_ENDIAN
   do {
     uint32_t t = (uint32_t)((unsigned) buf[3] << 8 | buf[2]) << 16 |
                  ((unsigned) buf[1] << 8 | buf[0]);
     *(uint32_t *) buf = t;
     buf += 4;
   } while (--longs);
 #else
   (void) buf;
   (void) longs;
 #endif
+}
 #define F1(x, y, z) (z ^ (x & (y ^ z)))
 #define F2(x, y, z) F1(z, x, y)
 #define F3(x, y, z) (x ^ y ^ z)
 #define F4(x, y, z) (y ^ (x | ~z))
 #define MD5STEP(f, w, x, y, z, data, s) \
   (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x)
 /*
  * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
  * initialization constants.
  */
 void MD5_Init(MD5_CTX *ctx) {
   ctx->buf[0] = 0x67452301;
   ctx->buf[1] = 0xefcdab89;
   ctx->buf[2] = 0x98badcfe;
   ctx->buf[3] = 0x10325476;
   ctx->bits[0] = 0;
   ctx->bits[1] = 0;
+}
 static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
   register uint32_t a, b, c, d;
   a = buf[0];
   b = buf[1];
   c = buf[2];
   d = buf[3];
   MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
   MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
   MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
   MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
   MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
   MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
   MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
   MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
   MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
   MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
   MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
   MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
   MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
   MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
   MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
   MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
   MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
   MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
   MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
   MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
   MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
   MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
   MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
   MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
   MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
   MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
   MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
   MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
   MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
   MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
   MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
   MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
   MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
   MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
   MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
   MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
   MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
   MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
   MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
   MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
   MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
   MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
   MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
   MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
   MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
   MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
   MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
   MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
   MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
   MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
   MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
   MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
   MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
   MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
   MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
   MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
   MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
   MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
   MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
   MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
   MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
   MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
   MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
   MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
   buf[0] += a;
   buf[1] += b;
   buf[2] += c;
   buf[3] += d;
+}
 void MD5_Update(MD5_CTX *ctx, const unsigned char *buf, size_t len) {
   uint32_t t;
   t = ctx->bits[0];
   if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++;
   ctx->bits[1] += (uint32_t) len >> 29;
   t = (t >> 3) & 0x3f;
   if (t) {
     unsigned char *p = (unsigned char *) ctx->in + t;
     t = 64 - t;
     if (len < t) {
       memcpy(p, buf, len);
       return;
+    }
     memcpy(p, buf, t);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     buf += t;
     len -= t;
+  }
   while (len >= 64) {
     memcpy(ctx->in, buf, 64);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     buf += 64;
     len -= 64;
+  }
   memcpy(ctx->in, buf, len);
+}
 void MD5_Final(unsigned char digest[16], MD5_CTX *ctx) {
   unsigned count;
   unsigned char *p;
   uint32_t *a;
   count = (ctx->bits[0] >> 3) & 0x3F;
   p = ctx->in + count;
   *p++ = 0x80;
   count = 64 - 1 - count;
   if (count < 8) {
     memset(p, 0, count);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     memset(ctx->in, 0, 56);
   } else {
     memset(p, 0, count - 8);
+  }
   byteReverse(ctx->in, 14);
   a = (uint32_t *) ctx->in;
   a[14] = ctx->bits[0];
   a[15] = ctx->bits[1];
   MD5Transform(ctx->buf, (uint32_t *) ctx->in);
   byteReverse((unsigned char *) ctx->buf, 4);
   memcpy(digest, ctx->buf, 16);
   memset((char *) ctx, 0, sizeof(*ctx));
+}
 #endif /* CS_ENABLE_NATIVE_MD5 */
 /*
  * Stringify binary data. Output buffer size must be 2 * size_of_input + 1
  * because each byte of input takes 2 bytes in string representation
  * plus 1 byte for the terminating \0 character.
  */
 void cs_to_hex(char *to, const unsigned char *p, size_t len) {
   static const char *hex = "0123456789abcdef";
   for (; len--; p++) {
     *to++ = hex[p[0] >> 4];
     *to++ = hex[p[0] & 0x0f];
+  }
   *to = '\0';
+}
 char *cs_md5(char buf[33], ...) {
   unsigned char hash[16];
   const unsigned char *p;
   va_list ap;
   MD5_CTX ctx;
   MD5_Init(&ctx);
   va_start(ap, buf);
   while ((p = va_arg(ap, const unsigned char *) ) != NULL) {
     size_t len = va_arg(ap, size_t);
     MD5_Update(&ctx, p, len);
+  }
   va_end(ap);
   MD5_Final(hash, &ctx);
   cs_to_hex(buf, hash, sizeof(hash));
   return buf;
+}
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/mbuf.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef EXCLUDE_COMMON
 #include <assert.h>
 #include <string.h>
 /* Amalgamated: #include "mbuf.h" */
 #ifndef MBUF_REALLOC
 #define MBUF_REALLOC realloc
 #endif
 #ifndef MBUF_FREE
 #define MBUF_FREE free
 #endif
 void mbuf_init(struct mbuf *mbuf, size_t initial_size) {
   mbuf->len = mbuf->size = 0;
   mbuf->buf = NULL;
   mbuf_resize(mbuf, initial_size);
+}
 void mbuf_free(struct mbuf *mbuf) {
   if (mbuf->buf != NULL) {
     MBUF_FREE(mbuf->buf);
     mbuf_init(mbuf, 0);
+  }
+}
 void mbuf_resize(struct mbuf *a, size_t new_size) {
   if (new_size > a->size || (new_size < a->size && new_size >= a->len)) {
     char *buf = (char *) MBUF_REALLOC(a->buf, new_size);
     /*
      * In case realloc fails, there's not much we can do, except keep things as
      * they are. Note that NULL is a valid return value from realloc when
      * size == 0, but that is covered too.
      */
     if (buf == NULL && new_size != 0) return;
     a->buf = buf;
     a->size = new_size;
+  }
+}
 void mbuf_trim(struct mbuf *mbuf) {
   mbuf_resize(mbuf, mbuf->len);
+}
 size_t mbuf_insert(struct mbuf *a, size_t off, const void *buf, size_t len) {
   char *p = NULL;
   assert(a != NULL);
   assert(a->len <= a->size);
   assert(off <= a->len);
   /* check overflow */
   if (~(size_t) 0 - (size_t) a->buf < len) return 0;
   if (a->len + len <= a->size) {
     memmove(a->buf + off + len, a->buf + off, a->len - off);
     if (buf != NULL) {
       memcpy(a->buf + off, buf, len);
+    }
     a->len += len;
   } else if ((p = (char *) MBUF_REALLOC(
                   a->buf, (a->len + len) * MBUF_SIZE_MULTIPLIER)) != NULL) {
     a->buf = p;
     memmove(a->buf + off + len, a->buf + off, a->len - off);
     if (buf != NULL) {
       memcpy(a->buf + off, buf, len);
+    }
     a->len += len;
     a->size = a->len * MBUF_SIZE_MULTIPLIER;
   } else {
     len = 0;
+  }
   return len;
+}
 size_t mbuf_append(struct mbuf *a, const void *buf, size_t len) {
   return mbuf_insert(a, a->len, buf, len);
+}
 void mbuf_remove(struct mbuf *mb, size_t n) {
   if (n > 0 && n <= mb->len) {
     memmove(mb->buf, mb->buf + n, mb->len - n);
     mb->len -= n;
+  }
+}
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/sha1.c"
 /**/
 #endif
 /* Copyright(c) By Steve Reid <steve@edmweb.com> */
 /* 100% Public Domain */
 #if !defined(DISABLE_SHA1) && !defined(EXCLUDE_COMMON)
 /* Amalgamated: #include "sha1.h" */
 #define SHA1HANDSOFF
 #if defined(__sun)
 /* Amalgamated: #include "solarisfixes.h" */
 #endif
 union char64long16 {
   unsigned char c[64];
   uint32_t l[16];
 };
 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
 static uint32_t blk0(union char64long16 *block, int i) {
 /* Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN */
 #if BYTE_ORDER == LITTLE_ENDIAN
   block->l[i] =
       (rol(block->l[i], 24) & 0xFF00FF00) | (rol(block->l[i], 8) & 0x00FF00FF);
 #endif
   return block->l[i];
+}
 /* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */
 #undef blk
 #undef R0
 #undef R1
 #undef R2
 #undef R3
 #undef R4
 #define blk(i)                                                               \
   (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \
                               block->l[(i + 2) & 15] ^ block->l[i & 15],     \
 ))
 #define R0(v, w, x, y, z, i)                                          \
   z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \
   w = rol(w, 30);
 #define R1(v, w, x, y, z, i)                                  \
   z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
   w = rol(w, 30);
 #define R2(v, w, x, y, z, i)                          \
   z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \
   w = rol(w, 30);
 #define R3(v, w, x, y, z, i)                                        \
   z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
   w = rol(w, 30);
 #define R4(v, w, x, y, z, i)                          \
   z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
   w = rol(w, 30);
 void cs_sha1_transform(uint32_t state[5], const unsigned char buffer[64]) {
   uint32_t a, b, c, d, e;
   union char64long16 block[1];
   memcpy(block, buffer, 64);
   a = state[0];
   b = state[1];
   c = state[2];
   d = state[3];
   e = state[4];
   R0(a, b, c, d, e, 0);
   R0(e, a, b, c, d, 1);
   R0(d, e, a, b, c, 2);
   R0(c, d, e, a, b, 3);
   R0(b, c, d, e, a, 4);
   R0(a, b, c, d, e, 5);
   R0(e, a, b, c, d, 6);
   R0(d, e, a, b, c, 7);
   R0(c, d, e, a, b, 8);
   R0(b, c, d, e, a, 9);
   R0(a, b, c, d, e, 10);
   R0(e, a, b, c, d, 11);
   R0(d, e, a, b, c, 12);
   R0(c, d, e, a, b, 13);
   R0(b, c, d, e, a, 14);
   R0(a, b, c, d, e, 15);
   R1(e, a, b, c, d, 16);
   R1(d, e, a, b, c, 17);
   R1(c, d, e, a, b, 18);
   R1(b, c, d, e, a, 19);
   R2(a, b, c, d, e, 20);
   R2(e, a, b, c, d, 21);
   R2(d, e, a, b, c, 22);
   R2(c, d, e, a, b, 23);
   R2(b, c, d, e, a, 24);
   R2(a, b, c, d, e, 25);
   R2(e, a, b, c, d, 26);
   R2(d, e, a, b, c, 27);
   R2(c, d, e, a, b, 28);
   R2(b, c, d, e, a, 29);
   R2(a, b, c, d, e, 30);
   R2(e, a, b, c, d, 31);
   R2(d, e, a, b, c, 32);
   R2(c, d, e, a, b, 33);
   R2(b, c, d, e, a, 34);
   R2(a, b, c, d, e, 35);
   R2(e, a, b, c, d, 36);
   R2(d, e, a, b, c, 37);
   R2(c, d, e, a, b, 38);
   R2(b, c, d, e, a, 39);
   R3(a, b, c, d, e, 40);
   R3(e, a, b, c, d, 41);
   R3(d, e, a, b, c, 42);
   R3(c, d, e, a, b, 43);
   R3(b, c, d, e, a, 44);
   R3(a, b, c, d, e, 45);
   R3(e, a, b, c, d, 46);
   R3(d, e, a, b, c, 47);
   R3(c, d, e, a, b, 48);
   R3(b, c, d, e, a, 49);
   R3(a, b, c, d, e, 50);
   R3(e, a, b, c, d, 51);
   R3(d, e, a, b, c, 52);
   R3(c, d, e, a, b, 53);
   R3(b, c, d, e, a, 54);
   R3(a, b, c, d, e, 55);
   R3(e, a, b, c, d, 56);
   R3(d, e, a, b, c, 57);
   R3(c, d, e, a, b, 58);
   R3(b, c, d, e, a, 59);
   R4(a, b, c, d, e, 60);
   R4(e, a, b, c, d, 61);
   R4(d, e, a, b, c, 62);
   R4(c, d, e, a, b, 63);
   R4(b, c, d, e, a, 64);
   R4(a, b, c, d, e, 65);
   R4(e, a, b, c, d, 66);
   R4(d, e, a, b, c, 67);
   R4(c, d, e, a, b, 68);
   R4(b, c, d, e, a, 69);
   R4(a, b, c, d, e, 70);
   R4(e, a, b, c, d, 71);
   R4(d, e, a, b, c, 72);
   R4(c, d, e, a, b, 73);
   R4(b, c, d, e, a, 74);
   R4(a, b, c, d, e, 75);
   R4(e, a, b, c, d, 76);
   R4(d, e, a, b, c, 77);
   R4(c, d, e, a, b, 78);
   R4(b, c, d, e, a, 79);
   state[0] += a;
   state[1] += b;
   state[2] += c;
   state[3] += d;
   state[4] += e;
   /* Erase working structures. The order of operations is important,
    * used to ensure that compiler doesn't optimize those out. */
   memset(block, 0, sizeof(block));
   a = b = c = d = e = 0;
   (void) a;
   (void) b;
   (void) c;
   (void) d;
   (void) e;
+}
 void cs_sha1_init(cs_sha1_ctx *context) {
   context->state[0] = 0x67452301;
   context->state[1] = 0xEFCDAB89;
   context->state[2] = 0x98BADCFE;
   context->state[3] = 0x10325476;
   context->state[4] = 0xC3D2E1F0;
   context->count[0] = context->count[1] = 0;
+}
 void cs_sha1_update(cs_sha1_ctx *context, const unsigned char *data,
                     uint32_t len) {
   uint32_t i, j;
   j = context->count[0];
   if ((context->count[0] += len << 3) < j) context->count[1]++;
   context->count[1] += (len >> 29);
   j = (j >> 3) & 63;
   if ((j + len) > 63) {
     memcpy(&context->buffer[j], data, (i = 64 - j));
     cs_sha1_transform(context->state, context->buffer);
     for (; i + 63 < len; i += 64) {
       cs_sha1_transform(context->state, &data[i]);
+    }
     j = 0;
   } else
     i = 0;
   memcpy(&context->buffer[j], &data[i], len - i);
+}
 void cs_sha1_final(unsigned char digest[20], cs_sha1_ctx *context) {
   unsigned i;
   unsigned char finalcount[8], c;
   for (i = 0; i < 8; i++) {
     finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >>
                                       ((3 - (i & 3)) * 8)) &
 );
+  }
   c = 0200;
   cs_sha1_update(context, &c, 1);
   while ((context->count[0] & 504) != 448) {
     c = 0000;
     cs_sha1_update(context, &c, 1);
+  }
   cs_sha1_update(context, finalcount, 8);
   for (i = 0; i < 20; i++) {
     digest[i] =
         (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
+  }
   memset(context, '\0', sizeof(*context));
   memset(&finalcount, '\0', sizeof(finalcount));
+}
 void cs_hmac_sha1(const unsigned char *key, size_t keylen,
                   const unsigned char *data, size_t datalen,
                   unsigned char out[20]) {
   cs_sha1_ctx ctx;
   unsigned char buf1[64], buf2[64], tmp_key[20], i;
   if (keylen > sizeof(buf1)) {
     cs_sha1_init(&ctx);
     cs_sha1_update(&ctx, key, keylen);
     cs_sha1_final(tmp_key, &ctx);
     key = tmp_key;
     keylen = sizeof(tmp_key);
+  }
   memset(buf1, 0, sizeof(buf1));
   memset(buf2, 0, sizeof(buf2));
   memcpy(buf1, key, keylen);
   memcpy(buf2, key, keylen);
   for (i = 0; i < sizeof(buf1); i++) {
     buf1[i] ^= 0x36;
     buf2[i] ^= 0x5c;
+  }
   cs_sha1_init(&ctx);
   cs_sha1_update(&ctx, buf1, sizeof(buf1));
   cs_sha1_update(&ctx, data, datalen);
   cs_sha1_final(out, &ctx);
   cs_sha1_init(&ctx);
   cs_sha1_update(&ctx, buf2, sizeof(buf2));
   cs_sha1_update(&ctx, out, 20);
   cs_sha1_final(out, &ctx);
+}
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/../../common/str_util.c"
 /**/
 #endif
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef EXCLUDE_COMMON
 /* Amalgamated: #include "osdep.h" */
 /* Amalgamated: #include "str_util.h" */
 #ifdef _MG_PROVIDE_STRNLEN
 size_t strnlen(const char *s, size_t maxlen) {
   size_t l = 0;
   for (; l < maxlen && s[l] != '\0'; l++) {
+  }
   return l;
+}
 #endif
 #define C_SNPRINTF_APPEND_CHAR(ch)       \
   do {                                   \
     if (i < (int) buf_size) buf[i] = ch; \
     i++;                                 \
   } while (0)
 #define C_SNPRINTF_FLAG_ZERO 1
 #ifdef C_DISABLE_BUILTIN_SNPRINTF
 int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) {
   return vsnprintf(buf, buf_size, fmt, ap);
+}
 #else
 static int c_itoa(char *buf, size_t buf_size, int64_t num, int base, int flags,
                   int field_width) {
   char tmp[40];
   int i = 0, k = 0, neg = 0;
   if (num < 0) {
     neg++;
     num = -num;
+  }
   /* Print into temporary buffer - in reverse order */
   do {
     int rem = num % base;
     if (rem < 10) {
       tmp[k++] = '0' + rem;
     } else {
       tmp[k++] = 'a' + (rem - 10);
+    }
     num /= base;
   } while (num > 0);
   /* Zero padding */
   if (flags && C_SNPRINTF_FLAG_ZERO) {
     while (k < field_width && k < (int) sizeof(tmp) - 1) {
       tmp[k++] = '0';
+    }
+  }
   /* And sign */
   if (neg) {
     tmp[k++] = '-';
+  }
   /* Now output */
   while (--k >= 0) {
     C_SNPRINTF_APPEND_CHAR(tmp[k]);
+  }
   return i;
+}
 int c_vsnprintf(char *buf, size_t buf_size, const char *fmt, va_list ap) {
   int ch, i = 0, len_mod, flags, precision, field_width;
   while ((ch = *fmt++) != '\0') {
     if (ch != '%') {
       C_SNPRINTF_APPEND_CHAR(ch);
     } else {
       /*
        * Conversion specification:
        *   zero or more flags (one of: # 0 - <space> + ')
        *   an optional minimum  field  width (digits)
        *   an  optional precision (. followed by digits, or *)
        *   an optional length modifier (one of: hh h l ll L q j z t)
        *   conversion specifier (one of: d i o u x X e E f F g G a A c s p n)
        */
       flags = field_width = precision = len_mod = 0;
       /* Flags. only zero-pad flag is supported. */
       if (*fmt == '0') {
         flags |= C_SNPRINTF_FLAG_ZERO;
+      }
       /* Field width */
       while (*fmt >= '0' && *fmt <= '9') {
         field_width *= 10;
         field_width += *fmt++ - '0';
+      }
       /* Dynamic field width */
       if (*fmt == '*') {
         field_width = va_arg(ap, int);
         fmt++;
+      }
       /* Precision */
       if (*fmt == '.') {
         fmt++;
         if (*fmt == '*') {
           precision = va_arg(ap, int);
           fmt++;
         } else {
           while (*fmt >= '0' && *fmt <= '9') {
             precision *= 10;
             precision += *fmt++ - '0';
+          }
+        }
+      }
       /* Length modifier */
       switch (*fmt) {
         case 'h':
         case 'l':
         case 'L':
         case 'I':
         case 'q':
         case 'j':
         case 'z':
         case 't':
           len_mod = *fmt++;
           if (*fmt == 'h') {
             len_mod = 'H';
             fmt++;
+          }
           if (*fmt == 'l') {
             len_mod = 'q';
             fmt++;
+          }
           break;
+      }
       ch = *fmt++;
       if (ch == 's') {
         const char *s = va_arg(ap, const char *); /* Always fetch parameter */
         int j;
         int pad = field_width - (precision >= 0 ? strnlen(s, precision) : 0);
         for (j = 0; j < pad; j++) {
           C_SNPRINTF_APPEND_CHAR(' ');
+        }
         /* Ignore negative and 0 precisions */
         for (j = 0; (precision <= 0 || j < precision) && s[j] != '\0'; j++) {
           C_SNPRINTF_APPEND_CHAR(s[j]);
+        }
       } else if (ch == 'c') {
         ch = va_arg(ap, int); /* Always fetch parameter */
         C_SNPRINTF_APPEND_CHAR(ch);
       } else if (ch == 'd' && len_mod == 0) {
         i += c_itoa(buf + i, buf_size - i, va_arg(ap, int), 10, flags,
                     field_width);
       } else if (ch == 'd' && len_mod == 'l') {
         i += c_itoa(buf + i, buf_size - i, va_arg(ap, long), 10, flags,
                     field_width);
       } else if ((ch == 'x' || ch == 'u') && len_mod == 0) {
         i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned),
                     ch == 'x' ? 16 : 10, flags, field_width);
       } else if ((ch == 'x' || ch == 'u') && len_mod == 'l') {
         i += c_itoa(buf + i, buf_size - i, va_arg(ap, unsigned long),
                     ch == 'x' ? 16 : 10, flags, field_width);
       } else if (ch == 'p') {
         unsigned long num = (unsigned long) va_arg(ap, void *);
         C_SNPRINTF_APPEND_CHAR('0');
         C_SNPRINTF_APPEND_CHAR('x');
         i += c_itoa(buf + i, buf_size - i, num, 16, flags, 0);
       } else {
 #ifndef NO_LIBC
         /*
          * TODO(lsm): abort is not nice in a library, remove it
          * Also, ESP8266 SDK doesn't have it
          */
         abort();
 #endif
+      }
+    }
+  }
   /* Zero-terminate the result */
   if (buf_size > 0) {
     buf[i < (int) buf_size ? i : (int) buf_size - 1] = '\0';
+  }
   return i;
+}
 #endif
 int c_snprintf(char *buf, size_t buf_size, const char *fmt, ...) {
   int result;
   va_list ap;
   va_start(ap, fmt);
   result = c_vsnprintf(buf, buf_size, fmt, ap);
   va_end(ap);
   return result;
+}
 #ifdef _WIN32
 void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) {
   char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p;
   strncpy(buf, path, sizeof(buf));
   buf[sizeof(buf) - 1] = '\0';
   /* Trim trailing slashes. Leave backslash for paths like "X:\" */
   p = buf + strlen(buf) - 1;
   while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0';
   /*
    * Convert to Unicode and back. If doubly-converted string does not
    * match the original, something is fishy, reject.
    */
   memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
   MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
   WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
                       NULL, NULL);
   if (strcmp(buf, buf2) != 0) {
     wbuf[0] = L'\0';
+  }
+}
 #endif /* _WIN32 */
 #endif /* EXCLUDE_COMMON */
 #ifdef NS_MODULE_LINES
 #line 1 "src/net.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
+ *
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /* Amalgamated: #include "internal.h" */
 #if MG_MGR_EV_MGR == 1 /* epoll() */
 #include <sys/epoll.h>
 #endif
 #define MG_CTL_MSG_MESSAGE_SIZE 8192
 #define MG_VPRINTF_BUFFER_SIZE 100
 #define MG_MAX_HOST_LEN 200
 #define MG_COPY_COMMON_CONNECTION_OPTIONS(dst, src) \
   memcpy(dst, src, sizeof(*dst));
 /* Which flags can be pre-set by the user at connection creation time. */
 #define _MG_ALLOWED_CONNECT_FLAGS_MASK                                   \
   (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \
    MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG)
 /* Which flags should be modifiable by user's callbacks. */
 #define _MG_CALLBACK_MODIFIABLE_FLAGS_MASK                               \
   (MG_F_USER_1 | MG_F_USER_2 | MG_F_USER_3 | MG_F_USER_4 | MG_F_USER_5 | \
    MG_F_USER_6 | MG_F_WEBSOCKET_NO_DEFRAG | MG_F_SEND_AND_CLOSE |        \
    MG_F_CLOSE_IMMEDIATELY | MG_F_IS_WEBSOCKET | MG_F_DELETE_CHUNK)
 #ifndef intptr_t
 #define intptr_t long
 #endif
 struct ctl_msg {
   mg_event_handler_t callback;
   char message[MG_CTL_MSG_MESSAGE_SIZE];
 };
 int mg_is_error(int n);
 void mg_set_non_blocking_mode(sock_t sock);
 extern void mg_ev_mgr_init(struct mg_mgr *mgr);
 extern void mg_ev_mgr_free(struct mg_mgr *mgr);
 extern void mg_ev_mgr_add_conn(struct mg_connection *nc);
 extern void mg_ev_mgr_remove_conn(struct mg_connection *nc);
 MG_INTERNAL void mg_add_conn(struct mg_mgr *mgr, struct mg_connection *c) {
   DBG(("%p %p", mgr, c));
   c->mgr = mgr;
   c->next = mgr->active_connections;
   mgr->active_connections = c;
   c->prev = NULL;
   if (c->next != NULL) c->next->prev = c;
   mg_ev_mgr_add_conn(c);
+}
 MG_INTERNAL void mg_remove_conn(struct mg_connection *conn) {
   if (conn->prev == NULL) conn->mgr->active_connections = conn->next;
   if (conn->prev) conn->prev->next = conn->next;
   if (conn->next) conn->next->prev = conn->prev;
   mg_ev_mgr_remove_conn(conn);
+}
 MG_INTERNAL void mg_call(struct mg_connection *nc,
                          mg_event_handler_t ev_handler, int ev, void *ev_data) {
   unsigned long flags_before;
   if (ev_handler == NULL) {
     /*
      * If protocol handler is specified, call it. Otherwise, call user-specified
      * event handler.
      */
     ev_handler = nc->proto_handler ? nc->proto_handler : nc->handler;
+  }
   DBG(("%p %s ev=%d ev_data=%p flags=%lu rmbl=%d smbl=%d", nc,
        ev_handler == nc->handler ? "user" : "proto", ev, ev_data, nc->flags,
        (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
 #if !defined(NO_LIBC) && !defined(MG_DISABLE_HEXDUMP)
   /* LCOV_EXCL_START */
   if (nc->mgr->hexdump_file != NULL && ev != MG_EV_POLL &&
       ev != MG_EV_SEND /* handled separately */) {
     if (ev == MG_EV_RECV) {
       mg_hexdump_connection(nc, nc->mgr->hexdump_file, nc->recv_mbuf.buf,
                             *(int *) ev_data, ev);
     } else {
       mg_hexdump_connection(nc, nc->mgr->hexdump_file, NULL, 0, ev);
+    }
+  }
 /* LCOV_EXCL_STOP */
 #endif
   if (ev_handler != NULL) {
     flags_before = nc->flags;
     ev_handler(nc, ev, ev_data);
     /* Prevent user handler from fiddling with system flags. */
     if (ev_handler == nc->handler && nc->flags != flags_before) {
       nc->flags = (flags_before & ~_MG_CALLBACK_MODIFIABLE_FLAGS_MASK) |
                   (nc->flags & _MG_CALLBACK_MODIFIABLE_FLAGS_MASK);
+    }
+  }
   DBG(("%p after %s flags=%lu rmbl=%d smbl=%d", nc,
        ev_handler == nc->handler ? "user" : "proto", nc->flags,
        (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
+}
 void mg_if_poll(struct mg_connection *nc, time_t now) {
   mg_call(nc, NULL, MG_EV_POLL, &now);
+}
 static void mg_destroy_conn(struct mg_connection *conn) {
   mg_if_destroy_conn(conn);
   mbuf_free(&conn->recv_mbuf);
   mbuf_free(&conn->send_mbuf);
   MG_FREE(conn);
+}
 void mg_close_conn(struct mg_connection *conn) {
   DBG(("%p %lu", conn, conn->flags));
   if (!(conn->flags & MG_F_CONNECTING)) {
     mg_call(conn, NULL, MG_EV_CLOSE, NULL);
+  }
   mg_remove_conn(conn);
   mg_destroy_conn(conn);
+}
 void mg_mgr_init(struct mg_mgr *m, void *user_data) {
   memset(m, 0, sizeof(*m));
   m->ctl[0] = m->ctl[1] = INVALID_SOCKET;
   m->user_data = user_data;
 #ifdef _WIN32
+  {
     WSADATA data;
     WSAStartup(MAKEWORD(2, 2), &data);
+  }
 #elif !defined(AVR_LIBC) && !defined(MG_ESP8266)
   /* Ignore SIGPIPE signal, so if client cancels the request, it
    * won't kill the whole process. */
   signal(SIGPIPE, SIG_IGN);
 #endif
 #ifdef MG_ENABLE_SSL
+  {
     static int init_done;
     if (!init_done) {
       SSL_library_init();
       init_done++;
+    }
+  }
 #endif
   mg_ev_mgr_init(m);
   DBG(("=================================="));
   DBG(("init mgr=%p", m));
+}
 #ifdef MG_ENABLE_JAVASCRIPT
 static v7_val_t mg_send_js(struct v7 *v7) {
   v7_val_t arg0 = v7_arg(v7, 0);
   v7_val_t arg1 = v7_arg(v7, 1);
   struct mg_connection *c = (struct mg_connection *) v7_to_foreign(arg0);
   size_t len = 0;
   if (v7_is_string(arg1)) {
     const char *data = v7_to_string(v7, &arg1, &len);
     mg_send(c, data, len);
+  }
   return v7_create_number(len);
+}
 enum v7_err mg_enable_javascript(struct mg_mgr *m, struct v7 *v7,
                                  const char *init_file_name) {
   v7_val_t v;
   m->v7 = v7;
   v7_set_method(v7, v7_get_global(v7), "mg_send", mg_send_js);
   return v7_exec_file(v7, init_file_name, &v);
+}
 #endif
 void mg_mgr_free(struct mg_mgr *m) {
   struct mg_connection *conn, *tmp_conn;
   DBG(("%p", m));
   if (m == NULL) return;
   /* Do one last poll, see https://github.com/cesanta/mongoose/issues/286 */
   mg_mgr_poll(m, 0);
 #ifndef MG_DISABLE_SOCKETPAIR
   if (m->ctl[0] != INVALID_SOCKET) closesocket(m->ctl[0]);
   if (m->ctl[1] != INVALID_SOCKET) closesocket(m->ctl[1]);
 #endif
   m->ctl[0] = m->ctl[1] = INVALID_SOCKET;
   for (conn = m->active_connections; conn != NULL; conn = tmp_conn) {
     tmp_conn = conn->next;
     mg_close_conn(conn);
+  }
   mg_ev_mgr_free(m);
+}
 int mg_vprintf(struct mg_connection *nc, const char *fmt, va_list ap) {
   char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem;
   int len;
   if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
     mg_send(nc, buf, len);
+  }
   if (buf != mem && buf != NULL) {
     MG_FREE(buf); /* LCOV_EXCL_LINE */
   }               /* LCOV_EXCL_LINE */
   return len;
+}
 int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
   int len;
   va_list ap;
   va_start(ap, fmt);
   len = mg_vprintf(conn, fmt, ap);
   va_end(ap);
   return len;
+}
 #ifndef MG_DISABLE_SYNC_RESOLVER
 /* TODO(lsm): use non-blocking resolver */
 static int mg_resolve2(const char *host, struct in_addr *ina) {
 #ifdef MG_ENABLE_GETADDRINFO
   int rv = 0;
   struct addrinfo hints, *servinfo, *p;
   struct sockaddr_in *h = NULL;
   memset(&hints, 0, sizeof hints);
   hints.ai_family = AF_INET;
   hints.ai_socktype = SOCK_STREAM;
   if ((rv = getaddrinfo(host, NULL, NULL, &servinfo)) != 0) {
     DBG(("getaddrinfo(%s) failed: %s", host, strerror(errno)));
     return 0;
+  }
   for (p = servinfo; p != NULL; p = p->ai_next) {
     memcpy(&h, &p->ai_addr, sizeof(struct sockaddr_in *));
     memcpy(ina, &h->sin_addr, sizeof(ina));
+  }
   freeaddrinfo(servinfo);
   return 1;
 #else
   struct hostent *he;
   if ((he = gethostbyname(host)) == NULL) {
     DBG(("gethostbyname(%s) failed: %s", host, strerror(errno)));
   } else {
     memcpy(ina, he->h_addr_list[0], sizeof(*ina));
     return 1;
+  }
   return 0;
 #endif /* MG_ENABLE_GETADDRINFO */
+}
 int mg_resolve(const char *host, char *buf, size_t n) {
   struct in_addr ad;
   return mg_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0;
+}
 #endif /* MG_DISABLE_SYNC_RESOLVER */
 MG_INTERNAL struct mg_connection *mg_create_connection(
     struct mg_mgr *mgr, mg_event_handler_t callback,
     struct mg_add_sock_opts opts) {
   struct mg_connection *conn;
   if ((conn = (struct mg_connection *) MG_CALLOC(1, sizeof(*conn))) != NULL) {
     conn->sock = INVALID_SOCKET;
     conn->handler = callback;
     conn->mgr = mgr;
     conn->last_io_time = time(NULL);
     conn->flags = opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK;
     conn->user_data = opts.user_data;
     /*
      * SIZE_MAX is defined as a long long constant in
      * system headers on some platforms and so it
      * doesn't compile with pedantic ansi flags.
      */
     conn->recv_mbuf_limit = ~0;
   } else {
     MG_SET_PTRPTR(opts.error_string, "failed create connection");
+  }
   return conn;
+}
 /*
  * Address format: [PROTO://][HOST]:PORT
+ *
  * HOST could be IPv4/IPv6 address or a host name.
  * `host` is a destination buffer to hold parsed HOST part. Shoud be at least
  * MG_MAX_HOST_LEN bytes long.
  * `proto` is a returned socket type, either SOCK_STREAM or SOCK_DGRAM
+ *
  * Return:
  *   -1   on parse error
  *    0   if HOST needs DNS lookup
  *   >0   length of the address string
  */
 MG_INTERNAL int mg_parse_address(const char *str, union socket_address *sa,
                                  int *proto, char *host, size_t host_len) {
   unsigned int a, b, c, d, port = 0;
   int ch, len = 0;
 #ifdef MG_ENABLE_IPV6
   char buf[100];
 #endif
   /*
    * MacOS needs that. If we do not zero it, subsequent bind() will fail.
    * Also, all-zeroes in the socket address means binding to all addresses
    * for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
    */
   memset(sa, 0, sizeof(*sa));
   sa->sin.sin_family = AF_INET;
   *proto = SOCK_STREAM;
   if (strncmp(str, "udp://", 6) == 0) {
     str += 6;
     *proto = SOCK_DGRAM;
   } else if (strncmp(str, "tcp://", 6) == 0) {
     str += 6;
+  }
   if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
     /* Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 */
     sa->sin.sin_addr.s_addr =
         htonl(((uint32_t) a << 24) | ((uint32_t) b << 16) | c << 8 | d);
     sa->sin.sin_port = htons((uint16_t) port);
 #ifdef MG_ENABLE_IPV6
   } else if (sscanf(str, "[%99[^]]]:%u%n", buf, &port, &len) == 2 &&
              inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) {
     /* IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 */
     sa->sin6.sin6_family = AF_INET6;
     sa->sin.sin_port = htons((uint16_t) port);
 #endif
 #ifndef MG_DISABLE_RESOLVER
   } else if (strlen(str) < host_len &&
              sscanf(str, "%[^ :]:%u%n", host, &port, &len) == 2) {
     sa->sin.sin_port = htons((uint16_t) port);
     if (mg_resolve_from_hosts_file(host, sa) != 0) {
       return 0;
+    }
 #endif
   } else if (sscanf(str, ":%u%n", &port, &len) == 1 ||
              sscanf(str, "%u%n", &port, &len) == 1) {
     /* If only port is specified, bind to IPv4, INADDR_ANY */
     sa->sin.sin_port = htons((uint16_t) port);
   } else {
     return -1;
+  }
   ch = str[len]; /* Character that follows the address */
   return port < 0xffffUL && (ch == '\0' || ch == ',' || isspace(ch)) ? len : -1;
+}
 #ifdef MG_ENABLE_SSL
 /*
  * Certificate generation script is at
  * https://github.com/cesanta/mongoose/blob/master/scripts/generate_ssl_certificates.sh
  */
 #ifndef MG_DISABLE_PFS
 /*
  * Cipher suite options used for TLS negotiation.
  * https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_configurations
  */
 static const char mg_s_cipher_list[] =
 #if defined(MG_SSL_CRYPTO_MODERN)
     "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:"
     "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:"
     "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:"
     "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:"
     "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:"
     "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:"
     "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:"
     "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:"
     "!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK"
 #elif defined(MG_SSL_CRYPTO_OLD)
     "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:"
     "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:"
     "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:"
     "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:"
     "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:"
     "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:"
     "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:"
     "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:"
     "ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:"
     "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:"
     "HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:"
     "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"
 #else /* Default - intermediate. */
     "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:"
     "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:"
     "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:"
     "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:"
     "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:"
     "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:"
     "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:"
     "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:"
     "AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:"
     "DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:"
     "!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"
 #endif
+    ;
 /*
  * Default DH params for PFS cipher negotiation. This is a 2048-bit group.
  * Will be used if none are provided by the user in the certificate file.
  */
 static const char mg_s_default_dh_params[] =
     "\
 -----BEGIN DH PARAMETERS-----\n\
 MIIBCAKCAQEAlvbgD/qh9znWIlGFcV0zdltD7rq8FeShIqIhkQ0C7hYFThrBvF2E\n\
 Z9bmgaP+sfQwGpVlv9mtaWjvERbu6mEG7JTkgmVUJrUt/wiRzwTaCXBqZkdUO8Tq\n\
 +E6VOEQAilstG90ikN1Tfo+K6+X68XkRUIlgawBTKuvKVwBhuvlqTGerOtnXWnrt\n\
 ym//hd3cd5PBYGBix0i7oR4xdghvfR2WLVu0LgdThTBb6XP7gLd19cQ1JuBtAajZ\n\
 wMuPn7qlUkEFDIkAZy59/Hue/H2Q2vU/JsvVhHWCQBL4F1ofEAt50il6ZxR1QfFK\n\
 VGKDC4oOgm9DlxwwBoC2FjqmvQlqVV3kwIBAg==\n\
 -----END DH PARAMETERS-----\n";
 #endif
 static int mg_use_ca_cert(SSL_CTX *ctx, const char *cert) {
   if (ctx == NULL) {
     return -1;
   } else if (cert == NULL || cert[0] == '\0') {
     return 0;
+  }
   SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0);
   return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? 0 : -2;
+}
 static int mg_use_cert(SSL_CTX *ctx, const char *pem_file) {
   if (ctx == NULL) {
     return -1;
   } else if (pem_file == NULL || pem_file[0] == '\0') {
     return 0;
   } else if (SSL_CTX_use_certificate_file(ctx, pem_file, 1) == 0 ||
              SSL_CTX_use_PrivateKey_file(ctx, pem_file, 1) == 0) {
     return -2;
   } else {
 #ifndef MG_DISABLE_PFS
     BIO *bio = NULL;
     DH *dh = NULL;
     /* Try to read DH parameters from the cert/key file. */
     bio = BIO_new_file(pem_file, "r");
     if (bio != NULL) {
       dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
       BIO_free(bio);
+    }
     /*
      * If there are no DH params in the file, fall back to hard-coded ones.
      * Not ideal, but better than nothing.
      */
     if (dh == NULL) {
       bio = BIO_new_mem_buf((void *) mg_s_default_dh_params, -1);
       dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
       BIO_free(bio);
+    }
     if (dh != NULL) {
       SSL_CTX_set_tmp_dh(ctx, dh);
       SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE);
       DH_free(dh);
+    }
 #endif
     SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
     SSL_CTX_use_certificate_chain_file(ctx, pem_file);
     return 0;
+  }
+}
 /*
  * Turn the connection into SSL mode.
  * `cert` is the certificate file in PEM format. For listening connections,
  * certificate file must contain private key and server certificate,
  * concatenated. It may also contain DH params - these will be used for more
  * secure key exchange. `ca_cert` is a certificate authority (CA) PEM file, and
  * it is optional (can be set to NULL). If `ca_cert` is non-NULL, then
  * the connection is so-called two-way-SSL: other peer's certificate is
  * checked against the `ca_cert`.
+ *
  * Handy OpenSSL command to generate test self-signed certificate:
+ *
  *    openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 999
+ *
  * Return NULL on success, or error message on failure.
  */
 const char *mg_set_ssl(struct mg_connection *nc, const char *cert,
                        const char *ca_cert) {
   const char *result = NULL;
   if ((nc->flags & MG_F_LISTENING) &&
       (nc->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
     result = "SSL_CTX_new() failed";
   } else if (!(nc->flags & MG_F_LISTENING) &&
              (nc->ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) {
     result = "SSL_CTX_new() failed";
   } else if (mg_use_cert(nc->ssl_ctx, cert) != 0) {
     result = "Invalid ssl cert";
   } else if (mg_use_ca_cert(nc->ssl_ctx, ca_cert) != 0) {
     result = "Invalid CA cert";
   } else if (!(nc->flags & MG_F_LISTENING) &&
              (nc->ssl = SSL_new(nc->ssl_ctx)) == NULL) {
     result = "SSL_new() failed";
   } else if (!(nc->flags & MG_F_LISTENING) && nc->sock != INVALID_SOCKET) {
     /*
      * Socket is open here only if we are connecting to IP address
      * and does not open if we are connecting using async DNS resolver
      */
     SSL_set_fd(nc->ssl, nc->sock);
+  }
 /* TODO(rojer): remove when krypton exposes this function, even a dummy one */
 #ifdef OPENSSL_VERSION_NUMBER
   SSL_CTX_set_cipher_list(nc->ssl_ctx, mg_s_cipher_list);
 #endif
   return result;
+}
 static int mg_ssl_err(struct mg_connection *conn, int res) {
   int ssl_err = SSL_get_error(conn->ssl, res);
   if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= MG_F_WANT_READ;
   if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= MG_F_WANT_WRITE;
   return ssl_err;
+}
 #endif /* MG_ENABLE_SSL */
 struct mg_connection *mg_if_accept_tcp_cb(struct mg_connection *lc,
                                           union socket_address *sa,
                                           size_t sa_len) {
   struct mg_add_sock_opts opts;
   struct mg_connection *nc;
   (void) sa_len;
   memset(&opts, 0, sizeof(opts));
   nc = mg_create_connection(lc->mgr, lc->handler, opts);
   if (nc == NULL) return NULL;
   nc->listener = lc;
   nc->proto_data = lc->proto_data;
   nc->proto_handler = lc->proto_handler;
   nc->user_data = lc->user_data;
   nc->recv_mbuf_limit = lc->recv_mbuf_limit;
   nc->sa = *sa;
   mg_add_conn(nc->mgr, nc);
   if (nc->ssl == NULL) {
     /* For non-SSL connections deliver MG_EV_ACCEPT right away. */
     mg_call(nc, NULL, MG_EV_ACCEPT, &nc->sa);
+  }
   DBG(("%p %p %d %d, %p %p", lc, nc, nc->sock, (int) nc->flags, lc->ssl_ctx,
        nc->ssl));
   return nc;
+}
 static size_t recv_avail_size(struct mg_connection *conn, size_t max) {
   size_t avail;
   if (conn->recv_mbuf_limit < conn->recv_mbuf.len) return 0;
   avail = conn->recv_mbuf_limit - conn->recv_mbuf.len;
   return avail > max ? max : avail;
+}
 #ifdef MG_ENABLE_SSL
 static void mg_ssl_begin(struct mg_connection *nc) {
   int server_side = nc->listener != NULL;
   int res = server_side ? SSL_accept(nc->ssl) : SSL_connect(nc->ssl);
   DBG(("%p %d res %d %d %d", nc, server_side, res, errno, mg_ssl_err(nc, res)));
   if (res == 1) {
     nc->flags |= MG_F_SSL_HANDSHAKE_DONE;
     nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE);
     if (server_side) {
       union socket_address sa;
       socklen_t sa_len = sizeof(sa);
       /* In case port was set to 0, get the real port number */
       (void) getsockname(nc->sock, &sa.sa, &sa_len);
       mg_call(nc, NULL, MG_EV_ACCEPT, &sa);
     } else {
       int err = 0;
       mg_call(nc, NULL, MG_EV_CONNECT, &err);
+    }
   } else {
     int ssl_err = mg_ssl_err(nc, res);
     if (ssl_err != SSL_ERROR_WANT_READ && ssl_err != SSL_ERROR_WANT_WRITE) {
       nc->flags |= MG_F_CLOSE_IMMEDIATELY;
       if (!server_side) {
         int err = 0;
         mg_call(nc, NULL, MG_EV_CONNECT, &err);
+      }
+    }
+  }
+}
 #endif /* MG_ENABLE_SSL */
 void mg_send(struct mg_connection *nc, const void *buf, int len) {
   nc->last_io_time = time(NULL);
   if (nc->flags & MG_F_UDP) {
     mg_if_udp_send(nc, buf, len);
   } else {
     mg_if_tcp_send(nc, buf, len);
+  }
 #if !defined(NO_LIBC) && !defined(MG_DISABLE_HEXDUMP)
   if (nc->mgr && nc->mgr->hexdump_file != NULL) {
     mg_hexdump_connection(nc, nc->mgr->hexdump_file, buf, len, MG_EV_SEND);
+  }
 #endif
+}
 void mg_if_sent_cb(struct mg_connection *nc, int num_sent) {
   if (num_sent < 0) {
     nc->flags |= MG_F_CLOSE_IMMEDIATELY;
+  }
   mg_call(nc, NULL, MG_EV_SEND, &num_sent);
+}
 static void mg_recv_common(struct mg_connection *nc, void *buf, int len) {
   DBG(("%p %d %u", nc, len, (unsigned int) nc->recv_mbuf.len));
   if (nc->flags & MG_F_CLOSE_IMMEDIATELY) {
     DBG(("%p discarded %d bytes", nc, len));
     /*
      * This connection will not survive next poll. Do not deliver events,
      * send data to /dev/null without acking.
      */
     MG_FREE(buf);
     return;
+  }
   nc->last_io_time = time(NULL);
   if (nc->recv_mbuf.len == 0) {
     /* Adopt buf as recv_mbuf's backing store. */
     mbuf_free(&nc->recv_mbuf);
     nc->recv_mbuf.buf = (char *) buf;
     nc->recv_mbuf.size = nc->recv_mbuf.len = len;
   } else {
     size_t avail = recv_avail_size(nc, len);
     len = avail;
     mbuf_append(&nc->recv_mbuf, buf, len);
     MG_FREE(buf);
+  }
   mg_call(nc, NULL, MG_EV_RECV, &len);
+}
 void mg_if_recv_tcp_cb(struct mg_connection *nc, void *buf, int len) {
   mg_recv_common(nc, buf, len);
   mg_if_recved(nc, len);
+}
 void mg_if_recv_udp_cb(struct mg_connection *nc, void *buf, int len,
                        union socket_address *sa, size_t sa_len) {
   assert(nc->flags & MG_F_UDP);
   DBG(("%p %u", nc, (unsigned int) len));
   if (nc->flags & MG_F_LISTENING) {
     struct mg_connection *lc = nc;
     /*
      * Do we have an existing connection for this source?
      * This is very inefficient for long connection lists.
      */
     for (nc = mg_next(lc->mgr, NULL); nc != NULL; nc = mg_next(lc->mgr, nc)) {
       if (memcmp(&nc->sa.sa, &sa->sa, sa_len) == 0) break;
+    }
     if (nc == NULL) {
       struct mg_add_sock_opts opts;
       memset(&opts, 0, sizeof(opts));
       nc = mg_create_connection(lc->mgr, lc->handler, opts);
+    }
     if (nc != NULL) {
       nc->sock = lc->sock;
       nc->listener = lc;
       nc->sa = *sa;
       nc->proto_data = lc->proto_data;
       nc->proto_handler = lc->proto_handler;
       nc->user_data = lc->user_data;
       nc->recv_mbuf_limit = lc->recv_mbuf_limit;
       nc->flags = MG_F_UDP;
       mg_add_conn(lc->mgr, nc);
       mg_call(nc, NULL, MG_EV_ACCEPT, &nc->sa);
     } else {
       DBG(("OOM"));
+    }
+  }
   if (nc != NULL) {
     mg_recv_common(nc, buf, len);
   } else {
     /* Drop on the floor. */
     MG_FREE(buf);
+  }
   mg_if_recved(nc, len);
+}
 /*
  * Schedules an async connect for a resolved address and proto.
  * Called from two places: `mg_connect_opt()` and from async resolver.
  * When called from the async resolver, it must trigger `MG_EV_CONNECT` event
  * with a failure flag to indicate connection failure.
  */
 MG_INTERNAL struct mg_connection *mg_do_connect(struct mg_connection *nc,
                                                 int proto,
                                                 union socket_address *sa) {
   DBG(("%p %s://%s:%hu", nc, proto == SOCK_DGRAM ? "udp" : "tcp",
        inet_ntoa(sa->sin.sin_addr), ntohs(sa->sin.sin_port)));
   nc->flags |= MG_F_CONNECTING;
   if (proto == SOCK_DGRAM) {
     mg_if_connect_udp(nc);
   } else {
     mg_if_connect_tcp(nc, sa);
+  }
   mg_add_conn(nc->mgr, nc);
   return nc;
+}
 void mg_if_connect_cb(struct mg_connection *nc, int err) {
   DBG(("%p connect, err=%d", nc, err));
   nc->flags &= ~MG_F_CONNECTING;
   if (err == 0) {
 #ifdef MG_ENABLE_SSL
     if (nc->ssl != NULL) {
       SSL_set_fd(nc->ssl, nc->sock);
       mg_ssl_begin(nc);
       return;
+    }
 #endif
   } else {
     nc->flags |= MG_F_CLOSE_IMMEDIATELY;
+  }
   mg_call(nc, NULL, MG_EV_CONNECT, &err);
+}
 #ifndef MG_DISABLE_RESOLVER
 /*
  * Callback for the async resolver on mg_connect_opt() call.
  * Main task of this function is to trigger MG_EV_CONNECT event with
  *    either failure (and dealloc the connection)
  *    or success (and proceed with connect()
  */
 static void resolve_cb(struct mg_dns_message *msg, void *data) {
   struct mg_connection *nc = (struct mg_connection *) data;
   int i;
   int failure = -1;
   if (msg != NULL) {
     /*
      * Take the first DNS A answer and run...
      */
     for (i = 0; i < msg->num_answers; i++) {
       if (msg->answers[i].rtype == MG_DNS_A_RECORD) {
         /*
          * Async resolver guarantees that there is at least one answer.
          * TODO(lsm): handle IPv6 answers too
          */
         mg_dns_parse_record_data(msg, &msg->answers[i], &nc->sa.sin.sin_addr,
 );
         mg_do_connect(nc, nc->flags & MG_F_UDP ? SOCK_DGRAM : SOCK_STREAM,
                       &nc->sa);
         return;
+      }
+    }
+  }
   /*
    * If we get there was no MG_DNS_A_RECORD in the answer
    */
   mg_call(nc, NULL, MG_EV_CONNECT, &failure);
   mg_destroy_conn(nc);
+}
 #endif
 struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *address,
                                  mg_event_handler_t callback) {
   struct mg_connect_opts opts;
   memset(&opts, 0, sizeof(opts));
   return mg_connect_opt(mgr, address, callback, opts);
+}
 struct mg_connection *mg_connect_opt(struct mg_mgr *mgr, const char *address,
                                      mg_event_handler_t callback,
                                      struct mg_connect_opts opts) {
   struct mg_connection *nc = NULL;
   int proto, rc;
   struct mg_add_sock_opts add_sock_opts;
   char host[MG_MAX_HOST_LEN];
   MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts);
   if ((nc = mg_create_connection(mgr, callback, add_sock_opts)) == NULL) {
     return NULL;
   } else if ((rc = mg_parse_address(address, &nc->sa, &proto, host,
                                     sizeof(host))) < 0) {
     /* Address is malformed */
     MG_SET_PTRPTR(opts.error_string, "cannot parse address");
     mg_destroy_conn(nc);
     return NULL;
+  }
   nc->flags |= opts.flags & _MG_ALLOWED_CONNECT_FLAGS_MASK;
   nc->flags |= (proto == SOCK_DGRAM) ? MG_F_UDP : 0;
   nc->user_data = opts.user_data;
   if (rc == 0) {
 #ifndef MG_DISABLE_RESOLVER
     /*
      * DNS resolution is required for host.
      * mg_parse_address() fills port in nc->sa, which we pass to resolve_cb()
      */
     if (mg_resolve_async(nc->mgr, host, MG_DNS_A_RECORD, resolve_cb, nc) != 0) {
       MG_SET_PTRPTR(opts.error_string, "cannot schedule DNS lookup");
       mg_destroy_conn(nc);
       return NULL;
+    }
     return nc;
 #else
     MG_SET_PTRPTR(opts.error_string, "Resolver is disabled");
     mg_destroy_conn(nc);
     return NULL;
 #endif
   } else {
     /* Address is parsed and resolved to IP. proceed with connect() */
     return mg_do_connect(nc, proto, &nc->sa);
+  }
+}
 struct mg_connection *mg_bind(struct mg_mgr *srv, const char *address,
                               mg_event_handler_t event_handler) {
   struct mg_bind_opts opts;
   memset(&opts, 0, sizeof(opts));
   return mg_bind_opt(srv, address, event_handler, opts);
+}
 struct mg_connection *mg_bind_opt(struct mg_mgr *mgr, const char *address,
                                   mg_event_handler_t callback,
                                   struct mg_bind_opts opts) {
   union socket_address sa;
   struct mg_connection *nc = NULL;
   int proto, rc;
   struct mg_add_sock_opts add_sock_opts;
   char host[MG_MAX_HOST_LEN];
   MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts);
   if (mg_parse_address(address, &sa, &proto, host, sizeof(host)) <= 0) {
     MG_SET_PTRPTR(opts.error_string, "cannot parse address");
     return NULL;
+  }
   nc = mg_create_connection(mgr, callback, add_sock_opts);
   if (nc == NULL) {
     return NULL;
+  }
   nc->sa = sa;
   nc->flags |= MG_F_LISTENING;
   if (proto == SOCK_DGRAM) {
     nc->flags |= MG_F_UDP;
     rc = mg_if_listen_udp(nc, &nc->sa);
   } else {
     rc = mg_if_listen_tcp(nc, &nc->sa);
+  }
   if (rc != 0) {
     DBG(("Failed to open listener: %d", rc));
     MG_SET_PTRPTR(opts.error_string, "failed to open listener");
     mg_destroy_conn(nc);
     return NULL;
+  }
   mg_add_conn(nc->mgr, nc);
   return nc;
+}
 struct mg_connection *mg_next(struct mg_mgr *s, struct mg_connection *conn) {
   return conn == NULL ? s->active_connections : conn->next;
+}
 #ifndef MG_DISABLE_SOCKETPAIR
 void mg_broadcast(struct mg_mgr *mgr, mg_event_handler_t cb, void *data,
                   size_t len) {
   struct ctl_msg ctl_msg;
   /*
    * Mongoose manager has a socketpair, `struct mg_mgr::ctl`,
    * where `mg_broadcast()` pushes the message.
    * `mg_mgr_poll()` wakes up, reads a message from the socket pair, and calls
    * specified callback for each connection. Thus the callback function executes
    * in event manager thread.
    */
   if (mgr->ctl[0] != INVALID_SOCKET && data != NULL &&
       len < sizeof(ctl_msg.message)) {
     size_t dummy;
     ctl_msg.callback = cb;
     memcpy(ctl_msg.message, data, len);
     dummy = MG_SEND_FUNC(mgr->ctl[0], (char *) &ctl_msg,
                          offsetof(struct ctl_msg, message) + len, 0);
     dummy = MG_RECV_FUNC(mgr->ctl[0], (char *) &len, 1, 0);
     (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */
+  }
+}
 #endif /* MG_DISABLE_SOCKETPAIR */
 static int isbyte(int n) {
   return n >= 0 && n <= 255;
+}
 static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
   int n, a, b, c, d, slash = 32, len = 0;
   if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
        sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
       isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0 &&
       slash < 33) {
     len = n;
     *net =
         ((uint32_t) a << 24) | ((uint32_t) b << 16) | ((uint32_t) c << 8) | d;
     *mask = slash ? 0xffffffffU << (32 - slash) : 0;
+  }
   return len;
+}
 int mg_check_ip_acl(const char *acl, uint32_t remote_ip) {
   int allowed, flag;
   uint32_t net, mask;
   struct mg_str vec;
   /* If any ACL is set, deny by default */
   allowed = (acl == NULL || *acl == '\0') ? '+' : '-';
   while ((acl = mg_next_comma_list_entry(acl, &vec, NULL)) != NULL) {
     flag = vec.p[0];
     if ((flag != '+' && flag != '-') ||
         parse_net(&vec.p[1], &net, &mask) == 0) {
       return -1;
+    }
     if (net == (remote_ip & mask)) {
       allowed = flag;
+    }
+  }
   return allowed == '+';
+}
 /* Move data from one connection to another */
 void mg_forward(struct mg_connection *from, struct mg_connection *to) {
   mg_send(to, from->recv_mbuf.buf, from->recv_mbuf.len);
   mbuf_remove(&from->recv_mbuf, from->recv_mbuf.len);
+}
 #ifdef NS_MODULE_LINES
 #line 1 "src/net_if_socket.c"
 /**/
 #endif
 #ifndef MG_DISABLE_SOCKET_IF
 /* Amalgamated: #include "internal.h" */
 #define MG_TCP_RECV_BUFFER_SIZE 1024
 #define MG_UDP_RECV_BUFFER_SIZE 1500
 static sock_t mg_open_listening_socket(union socket_address *sa, int proto);
 static void mg_sock_set(struct mg_connection *nc, sock_t sock);
 void mg_set_non_blocking_mode(sock_t sock) {
 #ifdef _WIN32
   unsigned long on = 1;
   ioctlsocket(sock, FIONBIO, &on);
 #elif defined(MG_CC3200)
   cc3200_set_non_blocking_mode(sock);
 #else
   int flags = fcntl(sock, F_GETFL, 0);
   fcntl(sock, F_SETFL, flags | O_NONBLOCK);
 #endif
+}
 int mg_is_error(int n) {
 #ifdef MG_CC3200
   DBG(("n = %d, errno = %d", n, errno));
   if (n < 0) errno = n;
 #endif
   return n == 0 || (n < 0 && errno != EINTR && errno != EINPROGRESS &&
                     errno != EAGAIN && errno != EWOULDBLOCK
 #ifdef MG_CC3200
                     && errno != SL_EALREADY
 #endif
 #ifdef _WIN32
                     && WSAGetLastError() != WSAEINTR &&
                     WSAGetLastError() != WSAEWOULDBLOCK
 #endif
                     );
+}
 void mg_if_connect_tcp(struct mg_connection *nc,
                        const union socket_address *sa) {
   int rc;
   nc->sock = socket(AF_INET, SOCK_STREAM, 0);
   if (nc->sock < 0) {
     nc->sock = INVALID_SOCKET;
     nc->err = errno ? errno : 1;
     return;
+  }
 #if !defined(MG_CC3200) && !defined(MG_ESP8266)
   mg_set_non_blocking_mode(nc->sock);
 #endif
   rc = connect(nc->sock, &sa->sa, sizeof(sa->sin));
   nc->err = mg_is_error(rc) ? errno : 0;
   DBG(("%p sock %d err %d", nc, nc->sock, nc->err));
+}
 void mg_if_connect_udp(struct mg_connection *nc) {
   nc->sock = socket(AF_INET, SOCK_DGRAM, 0);
   if (nc->sock < 0) {
     nc->sock = INVALID_SOCKET;
     nc->err = errno ? errno : 1;
     return;
+  }
   nc->err = 0;
+}
 int mg_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) {
   sock_t sock = mg_open_listening_socket(sa, SOCK_STREAM);
   if (sock < 0) return (errno ? errno : 1);
   mg_sock_set(nc, sock);
   return 0;
+}
 int mg_if_listen_udp(struct mg_connection *nc, union socket_address *sa) {
   sock_t sock = mg_open_listening_socket(sa, SOCK_DGRAM);
   if (sock < 0) return (errno ? errno : 1);
   mg_sock_set(nc, sock);
   return 0;
+}
 void mg_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) {
   mbuf_append(&nc->send_mbuf, buf, len);
+}
 void mg_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) {
   DBG(("%p %d %d", nc, (int) len, (int) nc->send_mbuf.len));
   mbuf_append(&nc->send_mbuf, buf, len);
+}
 void mg_if_recved(struct mg_connection *nc, size_t len) {
   (void) nc;
   (void) len;
+}
 void mg_if_destroy_conn(struct mg_connection *nc) {
   if (nc->sock == INVALID_SOCKET) return;
 #ifdef MG_ENABLE_SSL
   if (nc->ssl != NULL) SSL_free(nc->ssl);
   if (nc->ssl_ctx != NULL) SSL_CTX_free(nc->ssl_ctx);
 #endif
   if (!(nc->flags & MG_F_UDP)) {
     closesocket(nc->sock);
   } else {
     /* Only close outgoing UDP sockets or listeners. */
     if (nc->listener == NULL) closesocket(nc->sock);
+  }
   /*
    * avoid users accidentally double close a socket
    * because it can lead to difficult to debug situations.
    * It would happen only if reusing a destroyed mg_connection
    * but it's not always possible to run the code through an
    * address sanitizer.
    */
   nc->sock = INVALID_SOCKET;
+}
 static void mg_accept_conn(struct mg_connection *lc) {
   struct mg_connection *nc;
   union socket_address sa;
   socklen_t sa_len = sizeof(sa);
   /* NOTE(lsm): on Windows, sock is always > FD_SETSIZE */
   sock_t sock = accept(lc->sock, &sa.sa, &sa_len);
   if (sock < 0) {
     DBG(("%p: failed to accept: %d", lc, errno));
     return;
+  }
   nc = mg_if_accept_tcp_cb(lc, &sa, sa_len);
   if (nc == NULL) {
     closesocket(sock);
     return;
+  }
   mg_sock_set(nc, sock);
 #ifdef MG_ENABLE_SSL
   if (lc->ssl_ctx != NULL) {
     nc->ssl = SSL_new(lc->ssl_ctx);
     if (nc->ssl == NULL || SSL_set_fd(nc->ssl, sock) != 1) {
       DBG(("SSL error"));
       mg_close_conn(nc);
+    }
+  }
 #endif
+}
 /* 'sa' must be an initialized address to bind to */
 static sock_t mg_open_listening_socket(union socket_address *sa, int proto) {
   socklen_t sa_len =
       (sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6);
   sock_t sock = INVALID_SOCKET;
 #if !defined(MG_CC3200) && !defined(MG_LWIP)
   int on = 1;
 #endif
   if ((sock = socket(sa->sa.sa_family, proto, 0)) != INVALID_SOCKET &&
 #if !defined(MG_CC3200) && \
     !defined(MG_LWIP) /* CC3200 and LWIP don't support either */
 #if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE)
       /* "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" http://goo.gl/RmrFTm */
       !setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (void *) &on,
                   sizeof(on)) &&
 #endif
 #if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE)
       /*
        * SO_RESUSEADDR is not enabled on Windows because the semantics of
        * SO_REUSEADDR on UNIX and Windows is different. On Windows,
        * SO_REUSEADDR allows to bind a socket to a port without error even if
        * the port is already open by another program. This is not the behavior
        * SO_REUSEADDR was designed for, and leads to hard-to-track failure
        * scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
        * SO_EXCLUSIVEADDRUSE is supported and set on a socket.
        */
       !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
 #endif
 #endif /* !MG_CC3200 && !MG_LWIP */
       !bind(sock, &sa->sa, sa_len) &&
       (proto == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) {
 #if !defined(MG_CC3200) && !defined(MG_LWIP) /* TODO(rojer): Fix this. */
     mg_set_non_blocking_mode(sock);
     /* In case port was set to 0, get the real port number */
     (void) getsockname(sock, &sa->sa, &sa_len);
 #endif
   } else if (sock != INVALID_SOCKET) {
     closesocket(sock);
     sock = INVALID_SOCKET;
+  }
   return sock;
+}
 static void mg_write_to_socket(struct mg_connection *nc) {
   struct mbuf *io = &nc->send_mbuf;
   int n = 0;
 #ifdef MG_LWIP
   /* With LWIP we don't know if the socket is ready */
   if (io->len == 0) return;
 #endif
   assert(io->len > 0);
   if (nc->flags & MG_F_UDP) {
     int n =
         sendto(nc->sock, io->buf, io->len, 0, &nc->sa.sa, sizeof(nc->sa.sin));
     DBG(("%p %d %d %d %s:%hu", nc, nc->sock, n, errno,
          inet_ntoa(nc->sa.sin.sin_addr), ntohs(nc->sa.sin.sin_port)));
     if (n > 0) {
       mbuf_remove(io, n);
+    }
     mg_if_sent_cb(nc, n);
     return;
+  }
 #ifdef MG_ENABLE_SSL
   if (nc->ssl != NULL) {
     if (nc->flags & MG_F_SSL_HANDSHAKE_DONE) {
       n = SSL_write(nc->ssl, io->buf, io->len);
       if (n <= 0) {
         int ssl_err = mg_ssl_err(nc, n);
         if (ssl_err == SSL_ERROR_WANT_READ || ssl_err == SSL_ERROR_WANT_WRITE) {
           return; /* Call us again */
         } else {
           nc->flags |= MG_F_CLOSE_IMMEDIATELY;
+        }
       } else {
         /* Successful SSL operation, clear off SSL wait flags */
         nc->flags &= ~(MG_F_WANT_READ | MG_F_WANT_WRITE);
+      }
     } else {
       mg_ssl_begin(nc);
       return;
+    }
   } else
 #endif
+  {
     n = (int) MG_SEND_FUNC(nc->sock, io->buf, io->len, 0);
+  }
   DBG(("%p %d bytes -> %d", nc, n, nc->sock));
   if (n > 0) {
     mbuf_remove(io, n);
+  }
   mg_if_sent_cb(nc, n);
+}
 static void mg_read_from_socket(struct mg_connection *conn) {
   int n = 0;
   char *buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE);
   if (buf == NULL) {
     DBG(("OOM"));
     return;
+  }
 #ifdef MG_ENABLE_SSL
   if (conn->ssl != NULL) {
     if (conn->flags & MG_F_SSL_HANDSHAKE_DONE) {
       /* SSL library may have more bytes ready to read then we ask to read.
        * Therefore, read in a loop until we read everything. Without the loop,
        * we skip to the next select() cycle which can just timeout. */
       while ((n = SSL_read(conn->ssl, buf, MG_TCP_RECV_BUFFER_SIZE)) > 0) {
         DBG(("%p %d bytes <- %d (SSL)", conn, n, conn->sock));
         mg_if_recv_tcp_cb(conn, buf, n);
         buf = NULL;
         if (conn->flags & MG_F_CLOSE_IMMEDIATELY) break;
         /* buf has been freed, we need a new one. */
         buf = (char *) MG_MALLOC(MG_TCP_RECV_BUFFER_SIZE);
         if (buf == NULL) break;
+      }
       MG_FREE(buf);
       mg_ssl_err(conn, n);
     } else {
       MG_FREE(buf);
       mg_ssl_begin(conn);
       return;
+    }
   } else
 #endif
+  {
     n = (int) MG_RECV_FUNC(conn->sock, buf,
                            recv_avail_size(conn, MG_TCP_RECV_BUFFER_SIZE), 0);
     if (n > 0) {
       DBG(("%p %d bytes (PLAIN) <- %d", conn, n, conn->sock));
       mg_if_recv_tcp_cb(conn, buf, n);
     } else {
       MG_FREE(buf);
+    }
     if (mg_is_error(n)) {
       conn->flags |= MG_F_CLOSE_IMMEDIATELY;
+    }
+  }
+}
 static int mg_recvfrom(struct mg_connection *nc, union socket_address *sa,
                        socklen_t *sa_len, char **buf) {
   int n;
   *buf = (char *) MG_MALLOC(MG_UDP_RECV_BUFFER_SIZE);
   if (*buf == NULL) {
     DBG(("Out of memory"));
     return -ENOMEM;
+  }
   n = recvfrom(nc->sock, *buf, MG_UDP_RECV_BUFFER_SIZE, 0, &sa->sa, sa_len);
   if (n <= 0) {
     DBG(("%p recvfrom: %s", nc, strerror(errno)));
     MG_FREE(*buf);
+  }
   return n;
+}
 static void mg_handle_udp_read(struct mg_connection *nc) {
   char *buf = NULL;
   union socket_address sa;
   socklen_t sa_len = sizeof(sa);
   int n = mg_recvfrom(nc, &sa, &sa_len, &buf);
   DBG(("%p %d bytes from %s:%d", nc, n, inet_ntoa(nc->sa.sin.sin_addr),
        ntohs(nc->sa.sin.sin_port)));
   mg_if_recv_udp_cb(nc, buf, n, &sa, sa_len);
+}
 #define _MG_F_FD_CAN_READ 1
 #define _MG_F_FD_CAN_WRITE 1 << 1
 #define _MG_F_FD_ERROR 1 << 2
 void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, time_t now) {
   DBG(("%p fd=%d fd_flags=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock,
        fd_flags, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
   if (nc->flags & MG_F_CONNECTING) {
     if (fd_flags != 0) {
       int err = 0;
 #if !defined(MG_CC3200) && !defined(MG_ESP8266)
       if (!(nc->flags & MG_F_UDP)) {
         socklen_t len = sizeof(err);
         int ret =
             getsockopt(nc->sock, SOL_SOCKET, SO_ERROR, (char *) &err, &len);
         if (ret != 0) err = 1;
+      }
 #else
 /* On CC3200 and ESP8266 we use blocking connect. If we got as far as
  * this, it means connect() was successful.
  * TODO(rojer): Figure out why it fails where blocking succeeds.
  */
 #endif
       mg_if_connect_cb(nc, err);
     } else if (nc->err != 0) {
       mg_if_connect_cb(nc, nc->err);
+    }
+  }
   if (fd_flags & _MG_F_FD_CAN_READ) {
     if (nc->flags & MG_F_UDP) {
       mg_handle_udp_read(nc);
     } else {
       if (nc->flags & MG_F_LISTENING) {
         /*
          * We're not looping here, and accepting just one connection at
          * a time. The reason is that eCos does not respect non-blocking
          * flag on a listening socket and hangs in a loop.
          */
         if (fd_flags & _MG_F_FD_CAN_READ) mg_accept_conn(nc);
         return;
       } else {
         mg_read_from_socket(nc);
+      }
+    }
     if (nc->flags & MG_F_CLOSE_IMMEDIATELY) return;
+  }
   if ((fd_flags & _MG_F_FD_CAN_WRITE) && nc->send_mbuf.len > 0) {
     mg_write_to_socket(nc);
+  }
   if (!(fd_flags & (_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE))) {
     mg_if_poll(nc, now);
+  }
   DBG(("%p after fd=%d nc_flags=%lu rmbl=%d smbl=%d", nc, nc->sock, nc->flags,
        (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
+}
 #ifndef MG_DISABLE_SOCKETPAIR
 static void mg_mgr_handle_ctl_sock(struct mg_mgr *mgr) {
   struct ctl_msg ctl_msg;
   int len =
       (int) MG_RECV_FUNC(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0);
   size_t dummy = MG_SEND_FUNC(mgr->ctl[1], ctl_msg.message, 1, 0);
   (void) dummy; /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 */
   if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) {
     struct mg_connection *nc;
     for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) {
       ctl_msg.callback(nc, MG_EV_POLL, ctl_msg.message);
+    }
+  }
+}
 #endif
 struct mg_connection *mg_add_sock(struct mg_mgr *s, sock_t sock,
                                   mg_event_handler_t callback) {
   struct mg_add_sock_opts opts;
   memset(&opts, 0, sizeof(opts));
   return mg_add_sock_opt(s, sock, callback, opts);
+}
 struct mg_connection *mg_add_sock_opt(struct mg_mgr *s, sock_t sock,
                                       mg_event_handler_t callback,
                                       struct mg_add_sock_opts opts) {
   struct mg_connection *nc = mg_create_connection(s, callback, opts);
   if (nc != NULL) {
     mg_sock_set(nc, sock);
     mg_add_conn(nc->mgr, nc);
+  }
   return nc;
+}
 /* Associate a socket to a connection. */
 static void mg_sock_set(struct mg_connection *nc, sock_t sock) {
   mg_set_non_blocking_mode(sock);
   mg_set_close_on_exec(sock);
   nc->sock = sock;
   DBG(("%p %d", nc, sock));
+}
 #if MG_MGR_EV_MGR == 1 /* epoll() */
 #ifndef MG_EPOLL_MAX_EVENTS
 #define MG_EPOLL_MAX_EVENTS 100
 #endif
 #define _MG_EPF_EV_EPOLLIN (1 << 0)
 #define _MG_EPF_EV_EPOLLOUT (1 << 1)
 #define _MG_EPF_NO_POLL (1 << 2)
 uint32_t mg_epf_to_evflags(unsigned int epf) {
   uint32_t result = 0;
   if (epf & _MG_EPF_EV_EPOLLIN) result |= EPOLLIN;
   if (epf & _MG_EPF_EV_EPOLLOUT) result |= EPOLLOUT;
   return result;
+}
 void mg_ev_mgr_epoll_set_flags(const struct mg_connection *nc,
                                struct epoll_event *ev) {
   /* NOTE: EPOLLERR and EPOLLHUP are always enabled. */
   ev->events = 0;
   if ((nc->flags & MG_F_LISTENING) || nc->recv_mbuf.len < nc->recv_mbuf_limit) {
     ev->events |= EPOLLIN;
+  }
   if ((nc->flags & MG_F_CONNECTING) || (nc->send_mbuf.len > 0)) {
     ev->events |= EPOLLOUT;
+  }
+}
 void mg_ev_mgr_epoll_ctl(struct mg_connection *nc, int op) {
   int epoll_fd = (intptr_t) nc->mgr->mgr_data;
   struct epoll_event ev;
   assert(op == EPOLL_CTL_ADD || op == EPOLL_CTL_MOD || EPOLL_CTL_DEL);
   DBG(("%p %d %d", nc, nc->sock, op));
   if (nc->sock == INVALID_SOCKET) return;
   if (op != EPOLL_CTL_DEL) {
     mg_ev_mgr_epoll_set_flags(nc, &ev);
     if (op == EPOLL_CTL_MOD) {
       uint32_t old_ev_flags = mg_epf_to_evflags((intptr_t) nc->mgr_data);
       if (ev.events == old_ev_flags) return;
+    }
     ev.data.ptr = nc;
+  }
   if (epoll_ctl(epoll_fd, op, nc->sock, &ev) != 0) {
     perror("epoll_ctl");
     abort();
+  }
+}
 void mg_ev_mgr_init(struct mg_mgr *mgr) {
   int epoll_fd;
   DBG(("%p using epoll()", mgr));
 #ifndef MG_DISABLE_SOCKETPAIR
   do {
     mg_socketpair(mgr->ctl, SOCK_DGRAM);
   } while (mgr->ctl[0] == INVALID_SOCKET);
 #endif
   epoll_fd = epoll_create(MG_EPOLL_MAX_EVENTS /* unused but required */);
   if (epoll_fd < 0) {
     perror("epoll_ctl");
     abort();
+  }
   mgr->mgr_data = (void *) ((intptr_t) epoll_fd);
   if (mgr->ctl[1] != INVALID_SOCKET) {
     struct epoll_event ev;
     ev.events = EPOLLIN;
     ev.data.ptr = NULL;
     if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, mgr->ctl[1], &ev) != 0) {
       perror("epoll_ctl");
       abort();
+    }
+  }
+}
 void mg_ev_mgr_free(struct mg_mgr *mgr) {
   int epoll_fd = (intptr_t) mgr->mgr_data;
   close(epoll_fd);
+}
 void mg_ev_mgr_add_conn(struct mg_connection *nc) {
   if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) {
     mg_ev_mgr_epoll_ctl(nc, EPOLL_CTL_ADD);
+  }
+}
 void mg_ev_mgr_remove_conn(struct mg_connection *nc) {
   if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) {
     mg_ev_mgr_epoll_ctl(nc, EPOLL_CTL_DEL);
+  }
+}
 time_t mg_mgr_poll(struct mg_mgr *mgr, int timeout_ms) {
   int epoll_fd = (intptr_t) mgr->mgr_data;
   struct epoll_event events[MG_EPOLL_MAX_EVENTS];
   struct mg_connection *nc, *next;
   int num_ev, fd_flags;
   time_t now;
   num_ev = epoll_wait(epoll_fd, events, MG_EPOLL_MAX_EVENTS, timeout_ms);
   now = time(NULL);
   DBG(("epoll_wait @ %ld num_ev=%d", (long) now, num_ev));
   while (num_ev-- > 0) {
     intptr_t epf;
     struct epoll_event *ev = events + num_ev;
     nc = (struct mg_connection *) ev->data.ptr;
     if (nc == NULL) {
       mg_mgr_handle_ctl_sock(mgr);
       continue;
+    }
     fd_flags = ((ev->events & (EPOLLIN | EPOLLHUP)) ? _MG_F_FD_CAN_READ : 0) |
                ((ev->events & (EPOLLOUT)) ? _MG_F_FD_CAN_WRITE : 0) |
                ((ev->events & (EPOLLERR)) ? _MG_F_FD_ERROR : 0);
     mg_mgr_handle_conn(nc, fd_flags, now);
     epf = (intptr_t) nc->mgr_data;
     epf ^= _MG_EPF_NO_POLL;
     nc->mgr_data = (void *) epf;
+  }
   for (nc = mgr->active_connections; nc != NULL; nc = next) {
     next = nc->next;
     if (!(((intptr_t) nc->mgr_data) & _MG_EPF_NO_POLL)) {
       mg_mgr_handle_conn(nc, 0, now);
     } else {
       intptr_t epf = (intptr_t) nc->mgr_data;
       epf ^= _MG_EPF_NO_POLL;
       nc->mgr_data = (void *) epf;
+    }
     if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) ||
         (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) {
       mg_close_conn(nc);
     } else {
       if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) {
         mg_ev_mgr_epoll_ctl(nc, EPOLL_CTL_MOD);
       } else {
         /* This is a kludge, but... */
         if (nc->send_mbuf.len > 0) {
           mg_mgr_handle_conn(nc, _MG_F_FD_CAN_WRITE, now);
+        }
+      }
+    }
+  }
   return now;
+}
 #else /* select() */
 void mg_ev_mgr_init(struct mg_mgr *mgr) {
   (void) mgr;
   DBG(("%p using select()", mgr));
 #ifndef MG_DISABLE_SOCKETPAIR
   do {
     mg_socketpair(mgr->ctl, SOCK_DGRAM);
   } while (mgr->ctl[0] == INVALID_SOCKET);
 #endif
+}
 void mg_ev_mgr_free(struct mg_mgr *mgr) {
   (void) mgr;
+}
 void mg_ev_mgr_add_conn(struct mg_connection *nc) {
   (void) nc;
+}
 void mg_ev_mgr_remove_conn(struct mg_connection *nc) {
   (void) nc;
+}
 void mg_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) {
   if (sock != INVALID_SOCKET) {
     FD_SET(sock, set);
     if (*max_fd == INVALID_SOCKET || sock > *max_fd) {
       *max_fd = sock;
+    }
+  }
+}
 time_t mg_mgr_poll(struct mg_mgr *mgr, int milli) {
   time_t now = time(NULL);
   struct mg_connection *nc, *tmp;
   struct timeval tv;
   fd_set read_set, write_set, err_set;
   sock_t max_fd = INVALID_SOCKET;
   int num_fds, num_selected;
   FD_ZERO(&read_set);
   FD_ZERO(&write_set);
   FD_ZERO(&err_set);
   mg_add_to_set(mgr->ctl[1], &read_set, &max_fd);
   for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) {
     tmp = nc->next;
     if (nc->sock == INVALID_SOCKET) {
       mg_mgr_handle_conn(nc, 0, now);
       continue;
+    }
     num_fds++;
     if (!(nc->flags & MG_F_WANT_WRITE) &&
         nc->recv_mbuf.len < nc->recv_mbuf_limit &&
         (!(nc->flags & MG_F_UDP) || nc->listener == NULL)) {
       mg_add_to_set(nc->sock, &read_set, &max_fd);
+    }
     if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) ||
         (nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) {
       mg_add_to_set(nc->sock, &write_set, &max_fd);
       mg_add_to_set(nc->sock, &err_set, &max_fd);
+    }
+  }
   tv.tv_sec = milli / 1000;
   tv.tv_usec = (milli % 1000) * 1000;
   num_selected = select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv);
   now = time(NULL);
   DBG(("select @ %ld num_ev=%d of %d", (long) now, num_selected, num_fds));
 #ifndef MG_DISABLE_SOCKETPAIR
   if (num_selected > 0 && mgr->ctl[1] != INVALID_SOCKET &&
       FD_ISSET(mgr->ctl[1], &read_set)) {
     mg_mgr_handle_ctl_sock(mgr);
+  }
 #endif
   for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
     int fd_flags = 0;
     if (num_selected > 0) {
       fd_flags = (FD_ISSET(nc->sock, &read_set) ? _MG_F_FD_CAN_READ : 0) |
                  (FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE : 0) |
                  (FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0);
+    }
 #ifdef MG_CC3200
     // CC3200 does not report UDP sockets as writeable.
     if (nc->flags & MG_F_UDP &&
         (nc->send_mbuf.len > 0 || nc->flags & MG_F_CONNECTING)) {
       fd_flags |= _MG_F_FD_CAN_WRITE;
+    }
 #endif
 #ifdef MG_LWIP
     /* With LWIP socket emulation layer, we don't get write events */
     fd_flags |= _MG_F_FD_CAN_WRITE;
 #endif
     tmp = nc->next;
     mg_mgr_handle_conn(nc, fd_flags, now);
+  }
   for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
     tmp = nc->next;
     if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) ||
         (nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) {
       mg_close_conn(nc);
+    }
+  }
   return now;
+}
 #endif
 #ifndef MG_DISABLE_SOCKETPAIR
 int mg_socketpair(sock_t sp[2], int sock_type) {
   union socket_address sa;
   sock_t sock;
   socklen_t len = sizeof(sa.sin);
   int ret = 0;
   sock = sp[0] = sp[1] = INVALID_SOCKET;
   (void) memset(&sa, 0, sizeof(sa));
   sa.sin.sin_family = AF_INET;
   sa.sin.sin_port = htons(0);
   sa.sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */
   if ((sock = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) {
   } else if (bind(sock, &sa.sa, len) != 0) {
   } else if (sock_type == SOCK_STREAM && listen(sock, 1) != 0) {
   } else if (getsockname(sock, &sa.sa, &len) != 0) {
   } else if ((sp[0] = socket(AF_INET, sock_type, 0)) == INVALID_SOCKET) {
   } else if (connect(sp[0], &sa.sa, len) != 0) {
   } else if (sock_type == SOCK_DGRAM &&
              (getsockname(sp[0], &sa.sa, &len) != 0 ||
               connect(sock, &sa.sa, len) != 0)) {
   } else if ((sp[1] = (sock_type == SOCK_DGRAM ? sock
                                                : accept(sock, &sa.sa, &len))) ==
              INVALID_SOCKET) {
   } else {
     mg_set_close_on_exec(sp[0]);
     mg_set_close_on_exec(sp[1]);
     if (sock_type == SOCK_STREAM) closesocket(sock);
     ret = 1;
+  }
   if (!ret) {
     if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
     if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
     if (sock != INVALID_SOCKET) closesocket(sock);
     sock = sp[0] = sp[1] = INVALID_SOCKET;
+  }
   return ret;
+}
 #endif /* MG_DISABLE_SOCKETPAIR */
 static void mg_sock_get_addr(sock_t sock, int remote,
                              union socket_address *sa) {
 #ifndef MG_CC3200
   socklen_t slen = sizeof(sa);
   memset(sa, 0, sizeof(*sa));
   if (remote) {
     getpeername(sock, &sa->sa, &slen);
   } else {
     getsockname(sock, &sa->sa, &slen);
+  }
 #else
   memset(sa, 0, sizeof(*sa));
 #endif
+}
 void mg_sock_to_str(sock_t sock, char *buf, size_t len, int flags) {
   union socket_address sa;
   mg_sock_get_addr(sock, flags & MG_SOCK_STRINGIFY_REMOTE, &sa);
   mg_sock_addr_to_str(&sa, buf, len, flags);
+}
 void mg_if_get_conn_addr(struct mg_connection *nc, int remote,
                          union socket_address *sa) {
   mg_sock_get_addr(nc->sock, remote, sa);
+}
 #endif /* !MG_DISABLE_SOCKET_IF */
 #ifdef NS_MODULE_LINES
 #line 1 "src/multithreading.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /* Amalgamated: #include "internal.h" */
 #ifdef MG_ENABLE_THREADS
 static void multithreaded_ev_handler(struct mg_connection *c, int ev, void *p);
 /*
  * This thread function executes user event handler.
  * It runs an event manager that has only one connection, until that
  * connection is alive.
  */
 static void *per_connection_thread_function(void *param) {
   struct mg_connection *c = (struct mg_connection *) param;
   struct mg_mgr m;
   mg_mgr_init(&m, NULL);
   mg_add_conn(&m, c);
   while (m.active_connections != NULL) {
     mg_mgr_poll(&m, 1000);
+  }
   mg_mgr_free(&m);
   // Point p to the end of the file name
   p = buf + strlen(buf) - 1;
   return param;
+}
   // Trim trailing backslash character
   while (p > buf && *p == '\\' && p[-1] != ':') {
     *p-- = '\0';
 static void link_conns(struct mg_connection *c1, struct mg_connection *c2) {
   c1->priv_2 = c2;
   c2->priv_2 = c1;
+}
    // Protect from CGI code disclosure.
    // This is very nasty hole. Windows happily opens files with
    // some garbage in the end of file name. So fopen("a.cgi    ", "r")
    // actually opens "a.cgi", and does not return an error!
   if (*p == 0x20 ||               // No space at the end
       (*p == 0x2e && p > buf) ||  // No '.' but allow '.' as full path
       *p == 0x2b ||               // No '+'
       (*p & ~0x7f)) {             // And generally no non-ASCII chars
     (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
     wbuf[0] = L'\0';
   } else {
     // Convert to Unicode and back. If doubly-converted string does not
     // match the original, something is fishy, reject.
     memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
     MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
     WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
                         NULL, NULL);
     if (strcmp(buf, buf2) != 0) {
       wbuf[0] = L'\0';
 static void unlink_conns(struct mg_connection *c) {
   struct mg_connection *peer = (struct mg_connection *) c->priv_2;
   if (peer != NULL) {
     peer->flags |= MG_F_SEND_AND_CLOSE;
     peer->priv_2 = NULL;
+  }
   c->priv_2 = NULL;
+}
 static void forwarder_ev_handler(struct mg_connection *c, int ev, void *p) {
   (void) p;
   if (ev == MG_EV_RECV && c->priv_2) {
     mg_forward(c, (struct mg_connection *) c->priv_2);
   } else if (ev == MG_EV_CLOSE) {
     unlink_conns(c);
+  }
+}
 #if defined(_WIN32_WCE)
 static time_t time(time_t *ptime) {
   time_t t;
   SYSTEMTIME st;
   FILETIME ft;
 static void spawn_handling_thread(struct mg_connection *nc) {
   struct mg_mgr dummy;
   sock_t sp[2];
   struct mg_connection *c[2];
   /*
    * Create a socket pair, and wrap each socket into the connection with
    * dummy event manager.
    * c[0] stays in this thread, c[1] goes to another thread.
    */
   mg_socketpair(sp, SOCK_STREAM);
   memset(&dummy, 0, sizeof(dummy));
   c[0] = mg_add_sock(&dummy, sp[0], forwarder_ev_handler);
   c[1] = mg_add_sock(&dummy, sp[1], (mg_event_handler_t) nc->listener->priv_1);
   /* Interlink client connection with c[0] */
   link_conns(c[0], nc);
   /*
    * Switch c[0] manager from the dummy one to the real one. c[1] manager
    * will be set in another thread, allocated on stack of that thread.
    */
   mg_add_conn(nc->mgr, c[0]);
   GetSystemTime(&st);
   SystemTimeToFileTime(&st, &ft);
   t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
   /*
    * Dress c[1] as nc.
    * TODO(lsm): code in accept_conn() looks similar. Refactor.
    */
   c[1]->listener = nc->listener;
   c[1]->proto_handler = nc->proto_handler;
   c[1]->proto_data = nc->proto_data;
   c[1]->user_data = nc->user_data;
   if (ptime != NULL) {
     *ptime = t;
   mg_start_thread(per_connection_thread_function, c[1]);
+}
   return t;
 static void multithreaded_ev_handler(struct mg_connection *c, int ev, void *p) {
   (void) p;
   if (ev == MG_EV_ACCEPT) {
     spawn_handling_thread(c);
     c->handler = forwarder_ev_handler;
+  }
+}
 void mg_enable_multithreading(struct mg_connection *nc) {
   /* Wrap user event handler into our multithreaded_ev_handler */
   nc->priv_1 = (void *) nc->handler;
   nc->handler = multithreaded_ev_handler;
+}
 #endif
 #ifdef NS_MODULE_LINES
 #line 1 "src/http.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
   int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
   FILETIME ft, lft;
   SYSTEMTIME st;
   TIME_ZONE_INFORMATION tzinfo;
 #ifndef MG_DISABLE_HTTP
   if (ptm == NULL) {
     return NULL;
 /* Amalgamated: #include "internal.h" */
 enum http_proto_data_type { DATA_NONE, DATA_FILE, DATA_PUT, DATA_CGI };
 struct proto_data_http {
   FILE *fp;         /* Opened file. */
   int64_t cl;       /* Content-Length. How many bytes to send. */
   int64_t sent;     /* How many bytes have been already sent. */
   int64_t body_len; /* How many bytes of chunked body was reassembled. */
   struct mg_connection *cgi_nc;
   enum http_proto_data_type type;
 };
 /*
  * This structure helps to create an environment for the spawned CGI program.
  * Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
  * last element must be NULL.
  * However, on Windows there is a requirement that all these VARIABLE=VALUE\0
  * strings must reside in a contiguous buffer. The end of the buffer is
  * marked by two '\0' characters.
  * We satisfy both worlds: we create an envp array (which is vars), all
  * entries are actually pointers inside buf.
  */
 struct cgi_env_block {
   struct mg_connection *nc;
   char buf[MG_CGI_ENVIRONMENT_SIZE];       /* Environment buffer */
   const char *vars[MG_MAX_CGI_ENVIR_VARS]; /* char *envp[] */
   int len;                                 /* Space taken */
   int nvars;                               /* Number of variables in envp[] */
 };
 #define MIME_ENTRY(_ext, _type) \
   { _ext, sizeof(_ext) - 1, _type }
 static const struct {
   const char *extension;
   size_t ext_len;
   const char *mime_type;
 } static_builtin_mime_types[] = {
     MIME_ENTRY("html", "text/html"),
     MIME_ENTRY("html", "text/html"),
     MIME_ENTRY("htm", "text/html"),
     MIME_ENTRY("shtm", "text/html"),
     MIME_ENTRY("shtml", "text/html"),
     MIME_ENTRY("css", "text/css"),
     MIME_ENTRY("js", "application/x-javascript"),
     MIME_ENTRY("ico", "image/x-icon"),
     MIME_ENTRY("gif", "image/gif"),
     MIME_ENTRY("jpg", "image/jpeg"),
     MIME_ENTRY("jpeg", "image/jpeg"),
     MIME_ENTRY("png", "image/png"),
     MIME_ENTRY("svg", "image/svg+xml"),
     MIME_ENTRY("txt", "text/plain"),
     MIME_ENTRY("torrent", "application/x-bittorrent"),
     MIME_ENTRY("wav", "audio/x-wav"),
     MIME_ENTRY("mp3", "audio/x-mp3"),
     MIME_ENTRY("mid", "audio/mid"),
     MIME_ENTRY("m3u", "audio/x-mpegurl"),
     MIME_ENTRY("ogg", "application/ogg"),
     MIME_ENTRY("ram", "audio/x-pn-realaudio"),
     MIME_ENTRY("xml", "text/xml"),
     MIME_ENTRY("ttf", "application/x-font-ttf"),
     MIME_ENTRY("json", "application/json"),
     MIME_ENTRY("xslt", "application/xml"),
     MIME_ENTRY("xsl", "application/xml"),
     MIME_ENTRY("ra", "audio/x-pn-realaudio"),
     MIME_ENTRY("doc", "application/msword"),
     MIME_ENTRY("exe", "application/octet-stream"),
     MIME_ENTRY("zip", "application/x-zip-compressed"),
     MIME_ENTRY("xls", "application/excel"),
     MIME_ENTRY("tgz", "application/x-tar-gz"),
     MIME_ENTRY("tar", "application/x-tar"),
     MIME_ENTRY("gz", "application/x-gunzip"),
     MIME_ENTRY("arj", "application/x-arj-compressed"),
     MIME_ENTRY("rar", "application/x-rar-compressed"),
     MIME_ENTRY("rtf", "application/rtf"),
     MIME_ENTRY("pdf", "application/pdf"),
     MIME_ENTRY("swf", "application/x-shockwave-flash"),
     MIME_ENTRY("mpg", "video/mpeg"),
     MIME_ENTRY("webm", "video/webm"),
     MIME_ENTRY("mpeg", "video/mpeg"),
     MIME_ENTRY("mov", "video/quicktime"),
     MIME_ENTRY("mp4", "video/mp4"),
     MIME_ENTRY("m4v", "video/x-m4v"),
     MIME_ENTRY("asf", "video/x-ms-asf"),
     MIME_ENTRY("avi", "video/x-msvideo"),
     MIME_ENTRY("bmp", "image/bmp"),
     {NULL, 0, NULL}};
 #ifndef MG_DISABLE_FILESYSTEM
 #ifndef MG_DISABLE_DAV
 static int mg_mkdir(const char *path, uint32_t mode) {
 #ifndef _WIN32
   return mkdir(path, mode);
 #else
   (void) mode;
   return _mkdir(path);
 #endif
+}
 #endif
   * (int64_t *) &ft = t;
   FileTimeToLocalFileTime(&ft, &lft);
   FileTimeToSystemTime(&lft, &st);
   ptm->tm_year = st.wYear - 1900;
   ptm->tm_mon = st.wMonth - 1;
   ptm->tm_wday = st.wDayOfWeek;
   ptm->tm_mday = st.wDay;
   ptm->tm_hour = st.wHour;
   ptm->tm_min = st.wMinute;
   ptm->tm_sec = st.wSecond;
   ptm->tm_yday = 0; // hope nobody uses this
   ptm->tm_isdst =
     GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
 static struct mg_str get_mime_type(const char *path, const char *dflt,
                                    const struct mg_serve_http_opts *opts) {
   const char *ext, *overrides;
   size_t i, path_len;
   struct mg_str r, k, v;
   path_len = strlen(path);
   return ptm;
   overrides = opts->custom_mime_types;
   while ((overrides = mg_next_comma_list_entry(overrides, &k, &v)) != NULL) {
     ext = path + (path_len - k.len);
     if (path_len > k.len && mg_vcasecmp(&k, ext) == 0) {
       return v;
+    }
+  }
 static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
   // FIXME(lsm): fix this.
   return localtime(ptime, ptm);
   for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) {
     ext = path + (path_len - static_builtin_mime_types[i].ext_len);
     if (path_len > static_builtin_mime_types[i].ext_len && ext[-1] == '.' &&
         mg_casecmp(ext, static_builtin_mime_types[i].extension) == 0) {
       r.p = static_builtin_mime_types[i].mime_type;
       r.len = strlen(r.p);
       return r;
+    }
+  }
 static size_t strftime(char *dst, size_t dst_size, const char *fmt,
                        const struct tm *tm) {
   (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
   return 0;
   r.p = dflt;
   r.len = strlen(r.p);
   return r;
+}
 #endif
 static int mg_rename(const char* oldname, const char* newname) {
   wchar_t woldbuf[PATH_MAX];
   wchar_t wnewbuf[PATH_MAX];
 /*
  * Check whether full request is buffered. Return:
  *   -1  if request is malformed
  *    0  if request is not yet fully buffered
  *   >0  actual request length, including last \r\n\r\n
  */
 static int get_request_len(const char *s, int buf_len) {
   const unsigned char *buf = (unsigned char *) s;
   int i;
   for (i = 0; i < buf_len; i++) {
     if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) {
       return -1;
     } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') {
       return i + 2;
     } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' &&
                buf[i + 2] == '\n') {
       return i + 3;
+    }
+  }
   return 0;
+}
 static const char *parse_http_headers(const char *s, const char *end, int len,
                                       struct http_message *req) {
   int i;
   for (i = 0; i < (int) ARRAY_SIZE(req->header_names) - 1; i++) {
     struct mg_str *k = &req->header_names[i], *v = &req->header_values[i];
     s = mg_skip(s, end, ": ", k);
     s = mg_skip(s, end, "\r\n", v);
     while (v->len > 0 && v->p[v->len - 1] == ' ') {
       v->len--; /* Trim trailing spaces in header value */
+    }
     if (k->len == 0 || v->len == 0) {
       k->p = v->p = NULL;
       k->len = v->len = 0;
       break;
+    }
     if (!mg_ncasecmp(k->p, "Content-Length", 14)) {
       req->body.len = to64(v->p);
       req->message.len = len + req->body.len;
+    }
+  }
   return s;
+}
 int mg_parse_http(const char *s, int n, struct http_message *hm, int is_req) {
   const char *end, *qs;
   int len = get_request_len(s, n);
   to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
   to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
   if (len <= 0) return len;
   return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
   memset(hm, 0, sizeof(*hm));
   hm->message.p = s;
   hm->body.p = s + len;
   hm->message.len = hm->body.len = (size_t) ~0;
   end = s + len;
   /* Request is fully buffered. Skip leading whitespaces. */
   while (s < end && isspace(*(unsigned char *) s)) s++;
   if (is_req) {
     /* Parse request line: method, URI, proto */
     s = mg_skip(s, end, " ", &hm->method);
     s = mg_skip(s, end, " ", &hm->uri);
     s = mg_skip(s, end, "\r\n", &hm->proto);
     if (hm->uri.p <= hm->method.p || hm->proto.p <= hm->uri.p) return -1;
     /* If URI contains '?' character, initialize query_string */
     if ((qs = (char *) memchr(hm->uri.p, '?', hm->uri.len)) != NULL) {
       hm->query_string.p = qs + 1;
       hm->query_string.len = &hm->uri.p[hm->uri.len] - (qs + 1);
       hm->uri.len = qs - hm->uri.p;
+    }
   } else {
     s = mg_skip(s, end, " ", &hm->proto);
     if (end - s < 4 || s[3] != ' ') return -1;
     hm->resp_code = atoi(s);
     if (hm->resp_code < 100 || hm->resp_code >= 600) return -1;
     s += 4;
     s = mg_skip(s, end, "\r\n", &hm->resp_status_msg);
+  }
   s = parse_http_headers(s, end, len, hm);
   /*
    * mg_parse_http() is used to parse both HTTP requests and HTTP
    * responses. If HTTP response does not have Content-Length set, then
    * body is read until socket is closed, i.e. body.len is infinite (~0).
+   *
    * For HTTP requests though, according to
    * http://tools.ietf.org/html/rfc7231#section-8.1.3,
    * only POST and PUT methods have defined body semantics.
    * Therefore, if Content-Length is not specified and methods are
    * not one of PUT or POST, set body length to 0.
+   *
    * So,
    * if it is HTTP request, and Content-Length is not set,
    * and method is not (PUT or POST) then reset body length to zero.
    */
   if (hm->body.len == (size_t) ~0 && is_req &&
       mg_vcasecmp(&hm->method, "PUT") != 0 &&
       mg_vcasecmp(&hm->method, "POST") != 0) {
     hm->body.len = 0;
     hm->message.len = len;
+  }
   return len;
+}
 struct mg_str *mg_get_http_header(struct http_message *hm, const char *name) {
   size_t i, len = strlen(name);
   for (i = 0; hm->header_names[i].len > 0; i++) {
     struct mg_str *h = &hm->header_names[i], *v = &hm->header_values[i];
     if (h->p != NULL && h->len == len && !mg_ncasecmp(h->p, name, len))
       return v;
+  }
   return NULL;
+}
 #ifndef MG_DISABLE_HTTP_WEBSOCKET
 static int is_ws_fragment(unsigned char flags) {
   return (flags & 0x80) == 0 || (flags & 0x0f) == 0;
+}
 static int is_ws_first_fragment(unsigned char flags) {
   return (flags & 0x80) == 0 && (flags & 0x0f) != 0;
+}
 static void handle_incoming_websocket_frame(struct mg_connection *nc,
                                             struct websocket_message *wsm) {
   if (wsm->flags & 0x8) {
     mg_call(nc, nc->handler, MG_EV_WEBSOCKET_CONTROL_FRAME, wsm);
   } else {
     mg_call(nc, nc->handler, MG_EV_WEBSOCKET_FRAME, wsm);
+  }
+}
 static int deliver_websocket_data(struct mg_connection *nc) {
   /* Using unsigned char *, cause of integer arithmetic below */
   uint64_t i, data_len = 0, frame_len = 0, buf_len = nc->recv_mbuf.len, len,
               mask_len = 0, header_len = 0;
   unsigned char *p = (unsigned char *) nc->recv_mbuf.buf, *buf = p,
                 *e = p + buf_len;
   unsigned *sizep = (unsigned *) &p[1]; /* Size ptr for defragmented frames */
   int ok, reass = buf_len > 0 && is_ws_fragment(p[0]) &&
                   !(nc->flags & MG_F_WEBSOCKET_NO_DEFRAG);
   /* If that's a continuation frame that must be reassembled, handle it */
   if (reass && !is_ws_first_fragment(p[0]) && buf_len >= 1 + sizeof(*sizep) &&
       buf_len >= 1 + sizeof(*sizep) + *sizep) {
     buf += 1 + sizeof(*sizep) + *sizep;
     buf_len -= 1 + sizeof(*sizep) + *sizep;
+  }
   if (buf_len >= 2) {
     len = buf[1] & 127;
     mask_len = buf[1] & 128 ? 4 : 0;
     if (len < 126 && buf_len >= mask_len) {
       data_len = len;
       header_len = 2 + mask_len;
     } else if (len == 126 && buf_len >= 4 + mask_len) {
       header_len = 4 + mask_len;
       data_len = ntohs(*(uint16_t *) &buf[2]);
     } else if (buf_len >= 10 + mask_len) {
       header_len = 10 + mask_len;
       data_len = (((uint64_t) ntohl(*(uint32_t *) &buf[2])) << 32) +
                  ntohl(*(uint32_t *) &buf[6]);
+    }
+  }
   frame_len = header_len + data_len;
   ok = frame_len > 0 && frame_len <= buf_len;
   if (ok) {
     struct websocket_message wsm;
 static FILE *mg_fopen(const char *path, const char *mode) {
   wchar_t wbuf[PATH_MAX], wmode[20];
     wsm.size = (size_t) data_len;
     wsm.data = buf + header_len;
     wsm.flags = buf[0];
   to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
   MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
     /* Apply mask if necessary */
     if (mask_len > 0) {
       for (i = 0; i < data_len; i++) {
         buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4];
+      }
+    }
   return _wfopen(wbuf, wmode);
     if (reass) {
       /* On first fragmented frame, nullify size */
       if (is_ws_first_fragment(wsm.flags)) {
         mbuf_resize(&nc->recv_mbuf, nc->recv_mbuf.size + sizeof(*sizep));
         p[0] &= ~0x0f; /* Next frames will be treated as continuation */
         buf = p + 1 + sizeof(*sizep);
         *sizep = 0; /* TODO(lsm): fix. this can stomp over frame data */
+      }
 static int mg_stat(const char *path, struct mgstat *stp) {
   int ok = -1; // Error
   wchar_t wbuf[PATH_MAX];
   WIN32_FILE_ATTRIBUTE_DATA info;
       /* Append this frame to the reassembled buffer */
       memmove(buf, wsm.data, e - wsm.data);
       (*sizep) += wsm.size;
       nc->recv_mbuf.len -= wsm.data - buf;
   to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
       /* On last fragmented frame - call user handler and remove data */
       if (wsm.flags & 0x80) {
         wsm.data = p + 1 + sizeof(*sizep);
         wsm.size = *sizep;
         handle_incoming_websocket_frame(nc, &wsm);
         mbuf_remove(&nc->recv_mbuf, 1 + sizeof(*sizep) + *sizep);
+      }
     } else {
       /* TODO(lsm): properly handle OOB control frames during defragmentation */
       handle_incoming_websocket_frame(nc, &wsm);
       mbuf_remove(&nc->recv_mbuf, (size_t) frame_len); /* Cleanup frame */
+    }
   if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
     stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
     stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
                                info.ftLastWriteTime.dwHighDateTime);
     stp->is_directory =
       info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
     ok = 0;  // Success
     /* If client closes, close too */
     if ((buf[0] & 0x0f) == WEBSOCKET_OP_CLOSE) {
       nc->flags |= MG_F_SEND_AND_CLOSE;
+    }
+  }
   return ok;
+}
 static int mg_remove(const char *path) {
   wchar_t wbuf[PATH_MAX];
   to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
   return DeleteFileW(wbuf) ? 0 : -1;
 struct ws_mask_ctx {
   size_t pos; /* zero means unmasked */
   uint32_t mask;
 };
 static uint32_t ws_random_mask(void) {
 /*
  * The spec requires WS client to generate hard to
  * guess mask keys. From RFC6455, Section 5.3:
+ *
  * The unpredictability of the masking key is essential to prevent
  * authors of malicious applications from selecting the bytes that appear on
  * the wire.
+ *
  * Hence this feature is essential when the actual end user of this API
  * is untrusted code that wouldn't have access to a lower level net API
  * anyway (e.g. web browsers). Hence this feature is low prio for most
  * mongoose use cases and thus can be disabled, e.g. when porting to a platform
  * that lacks random().
  */
 #ifdef MG_DISABLE_WS_RANDOM_MASK
   return 0xefbeadde; /* generated with a random number generator, I swear */
 #else
   if (sizeof(long) >= 4) {
     return (uint32_t) random();
   } else if (sizeof(long) == 2) {
     return (uint32_t) random() << 16 | (uint32_t) random();
+  }
 #endif
+}
 static void mg_send_ws_header(struct mg_connection *nc, int op, size_t len,
                               struct ws_mask_ctx *ctx) {
   int header_len;
   unsigned char header[10];
   header[0] = (op & WEBSOCKET_DONT_FIN ? 0x0 : 0x80) + (op & 0x0f);
   if (len < 126) {
     header[1] = len;
     header_len = 2;
   } else if (len < 65535) {
     uint16_t tmp = htons((uint16_t) len);
     header[1] = 126;
     memcpy(&header[2], &tmp, sizeof(tmp));
     header_len = 4;
   } else {
     uint32_t tmp;
     header[1] = 127;
     tmp = htonl((uint32_t)((uint64_t) len >> 32));
     memcpy(&header[2], &tmp, sizeof(tmp));
     tmp = htonl((uint32_t)(len & 0xffffffff));
     memcpy(&header[6], &tmp, sizeof(tmp));
     header_len = 10;
+  }
   /* client connections enable masking */
   if (nc->listener == NULL) {
     header[1] |= 1 << 7; /* set masking flag */
     mg_send(nc, header, header_len);
     ctx->mask = ws_random_mask();
     mg_send(nc, &ctx->mask, sizeof(ctx->mask));
     ctx->pos = nc->send_mbuf.len;
   } else {
     mg_send(nc, header, header_len);
     ctx->pos = 0;
+  }
+}
 static void ws_mask_frame(struct mbuf *mbuf, struct ws_mask_ctx *ctx) {
   size_t i;
   if (ctx->pos == 0) return;
   for (i = 0; i < (mbuf->len - ctx->pos); i++) {
     mbuf->buf[ctx->pos + i] ^= ((char *) &ctx->mask)[i % 4];
+  }
+}
 static int mg_mkdir(const char *path, int mode) {
   char buf[PATH_MAX];
   wchar_t wbuf[PATH_MAX];
 void mg_send_websocket_frame(struct mg_connection *nc, int op, const void *data,
                              size_t len) {
   struct ws_mask_ctx ctx;
   mg_send_ws_header(nc, op, len, &ctx);
   mg_send(nc, data, len);
   mode = 0; // Unused
   mg_strlcpy(buf, path, sizeof(buf));
   change_slashes_to_backslashes(buf);
   ws_mask_frame(&nc->send_mbuf, &ctx);
   (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
   if (op == WEBSOCKET_OP_CLOSE) {
     nc->flags |= MG_F_SEND_AND_CLOSE;
+  }
+}
   return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
 void mg_send_websocket_framev(struct mg_connection *nc, int op,
                               const struct mg_str *strv, int strvcnt) {
   struct ws_mask_ctx ctx;
   int i;
   int len = 0;
   for (i = 0; i < strvcnt; i++) {
     len += strv[i].len;
+  }
 // Implementation of POSIX opendir/closedir/readdir for Windows.
 static DIR * opendir(const char *name) {
   DIR *dir = NULL;
   wchar_t wpath[PATH_MAX];
   DWORD attrs;
   mg_send_ws_header(nc, op, len, &ctx);
   if (name == NULL) {
     SetLastError(ERROR_BAD_ARGUMENTS);
   } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
     SetLastError(ERROR_NOT_ENOUGH_MEMORY);
   for (i = 0; i < strvcnt; i++) {
     mg_send(nc, strv[i].p, strv[i].len);
+  }
   ws_mask_frame(&nc->send_mbuf, &ctx);
   if (op == WEBSOCKET_OP_CLOSE) {
     nc->flags |= MG_F_SEND_AND_CLOSE;
+  }
+}
 void mg_printf_websocket_frame(struct mg_connection *nc, int op,
                                const char *fmt, ...) {
   char mem[BUFSIZ], *buf = mem;
   va_list ap;
   int len;
   va_start(ap, fmt);
   if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
     mg_send_websocket_frame(nc, op, buf, len);
+  }
   va_end(ap);
   if (buf != mem && buf != NULL) {
     MG_FREE(buf);
+  }
+}
 static void websocket_handler(struct mg_connection *nc, int ev, void *ev_data) {
   mg_call(nc, nc->handler, ev, ev_data);
   switch (ev) {
     case MG_EV_RECV:
       do {
       } while (deliver_websocket_data(nc));
       break;
     case MG_EV_POLL:
       /* Ping idle websocket connections */
+      {
         time_t now = *(time_t *) ev_data;
         if (nc->flags & MG_F_IS_WEBSOCKET &&
             now > nc->last_io_time + MG_WEBSOCKET_PING_INTERVAL_SECONDS) {
           mg_send_websocket_frame(nc, WEBSOCKET_OP_PING, "", 0);
+        }
+      }
       break;
     default:
       break;
+  }
+}
 static void ws_handshake(struct mg_connection *nc, const struct mg_str *key) {
   static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
   char buf[500], sha[20], b64_sha[sizeof(sha) * 2];
   cs_sha1_ctx sha_ctx;
   snprintf(buf, sizeof(buf), "%.*s%s", (int) key->len, key->p, magic);
   cs_sha1_init(&sha_ctx);
   cs_sha1_update(&sha_ctx, (unsigned char *) buf, strlen(buf));
   cs_sha1_final((unsigned char *) sha, &sha_ctx);
   mg_base64_encode((unsigned char *) sha, sizeof(sha), b64_sha);
   mg_printf(nc, "%s%s%s",
             "HTTP/1.1 101 Switching Protocols\r\n"
             "Upgrade: websocket\r\n"
             "Connection: Upgrade\r\n"
             "Sec-WebSocket-Accept: ",
             b64_sha, "\r\n\r\n");
+}
 #endif /* MG_DISABLE_HTTP_WEBSOCKET */
 static void free_http_proto_data(struct mg_connection *nc) {
   struct proto_data_http *dp = (struct proto_data_http *) nc->proto_data;
   if (dp != NULL) {
     if (dp->fp != NULL) {
       fclose(dp->fp);
+    }
     if (dp->cgi_nc != NULL) {
       dp->cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
+    }
     MG_FREE(dp);
     nc->proto_data = NULL;
+  }
+}
 static void transfer_file_data(struct mg_connection *nc) {
   struct proto_data_http *dp = (struct proto_data_http *) nc->proto_data;
   char buf[MG_MAX_HTTP_SEND_IOBUF];
   int64_t left = dp->cl - dp->sent;
   size_t n = 0, to_read = 0;
   if (dp->type == DATA_FILE) {
     struct mbuf *io = &nc->send_mbuf;
     if (io->len < sizeof(buf)) {
       to_read = sizeof(buf) - io->len;
+    }
     if (left > 0 && to_read > (size_t) left) {
       to_read = left;
+    }
     if (to_read == 0) {
       /* Rate limiting. send_mbuf is too full, wait until it's drained. */
     } else if (dp->sent < dp->cl && (n = fread(buf, 1, to_read, dp->fp)) > 0) {
       mg_send(nc, buf, n);
       dp->sent += n;
     } else {
     to_unicode(name, wpath, ARRAY_SIZE(wpath));
     attrs = GetFileAttributesW(wpath);
     if (attrs != 0xFFFFFFFF &&
         ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
       (void) wcscat(wpath, L"\\*");
       dir->handle = FindFirstFileW(wpath, &dir->info);
       dir->result.d_name[0] = '\0';
       free_http_proto_data(nc);
 #ifdef MG_DISABLE_HTTP_KEEP_ALIVE
       nc->flags |= MG_F_SEND_AND_CLOSE;
 #endif
+    }
   } else if (dp->type == DATA_PUT) {
     struct mbuf *io = &nc->recv_mbuf;
     size_t to_write =
         left <= 0 ? 0 : left < (int64_t) io->len ? (size_t) left : io->len;
     size_t n = fwrite(io->buf, 1, to_write, dp->fp);
     if (n > 0) {
       mbuf_remove(io, n);
       dp->sent += n;
+    }
     if (n == 0 || dp->sent >= dp->cl) {
       free_http_proto_data(nc);
 #ifdef MG_DISABLE_HTTP_KEEP_ALIVE
       nc->flags |= MG_F_SEND_AND_CLOSE;
 #endif
+    }
   } else if (dp->type == DATA_CGI) {
     /* This is POST data that needs to be forwarded to the CGI process */
     if (dp->cgi_nc != NULL) {
       mg_forward(nc, dp->cgi_nc);
     } else {
       free(dir);
       dir = NULL;
       nc->flags |= MG_F_SEND_AND_CLOSE;
+    }
+  }
+}
   return dir;
 /*
  * Parse chunked-encoded buffer. Return 0 if the buffer is not encoded, or
  * if it's incomplete. If the chunk is fully buffered, return total number of
  * bytes in a chunk, and store data in `data`, `data_len`.
  */
 static size_t parse_chunk(char *buf, size_t len, char **chunk_data,
                           size_t *chunk_len) {
   unsigned char *s = (unsigned char *) buf;
   size_t n = 0; /* scanned chunk length */
   size_t i = 0; /* index in s */
   /* Scan chunk length. That should be a hexadecimal number. */
   while (i < len && isxdigit(s[i])) {
     n *= 16;
     n += (s[i] >= '0' && s[i] <= '9') ? s[i] - '0' : tolower(s[i]) - 'a' + 10;
     i++;
+  }
 static int closedir(DIR *dir) {
   int result = 0;
   /* Skip new line */
   if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') {
     return 0;
+  }
   i += 2;
   if (dir != NULL) {
     if (dir->handle != INVALID_HANDLE_VALUE)
       result = FindClose(dir->handle) ? 0 : -1;
   /* Record where the data is */
   *chunk_data = (char *) s + i;
   *chunk_len = n;
   /* Skip data */
   i += n;
   /* Skip new line */
   if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') {
     return 0;
+  }
   return i + 2;
+}
 MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc,
                                      struct http_message *hm, char *buf,
                                      size_t blen) {
   struct proto_data_http *dp;
   char *data;
   size_t i, n, data_len, body_len, zero_chunk_received = 0;
   /* If not allocated, allocate proto_data to hold reassembled offset */
   if (nc->proto_data == NULL &&
       (nc->proto_data = MG_CALLOC(1, sizeof(*dp))) == NULL) {
     nc->flags |= MG_F_CLOSE_IMMEDIATELY;
     return 0;
+  }
   /* Find out piece of received data that is not yet reassembled */
   dp = (struct proto_data_http *) nc->proto_data;
   body_len = dp->body_len;
   assert(blen >= body_len);
   /* Traverse all fully buffered chunks */
   for (i = body_len; (n = parse_chunk(buf + i, blen - i, &data, &data_len)) > 0;
        i += n) {
     /* Collapse chunk data to the rest of HTTP body */
     memmove(buf + body_len, data, data_len);
     body_len += data_len;
     hm->body.len = body_len;
     if (data_len == 0) {
       zero_chunk_received = 1;
       i += n;
       break;
+    }
+  }
   if (i > body_len) {
     /* Shift unparsed content to the parsed body */
     assert(i <= blen);
     memmove(buf + body_len, buf + i, blen - i);
     memset(buf + body_len + blen - i, 0, i - body_len);
     nc->recv_mbuf.len -= i - body_len;
     dp->body_len = body_len;
     /* Send MG_EV_HTTP_CHUNK event */
     nc->flags &= ~MG_F_DELETE_CHUNK;
     mg_call(nc, nc->handler, MG_EV_HTTP_CHUNK, hm);
     /* Delete processed data if user set MG_F_DELETE_CHUNK flag */
     if (nc->flags & MG_F_DELETE_CHUNK) {
       memset(buf, 0, body_len);
       memmove(buf, buf + body_len, blen - i);
       nc->recv_mbuf.len -= body_len;
       hm->body.len = dp->body_len = 0;
+    }
     if (zero_chunk_received) {
       hm->message.len = dp->body_len + blen - i;
+    }
+  }
   return body_len;
+}
     free(dir);
 /*
  * lx106 compiler has a bug (TODO(mkm) report and insert tracking bug here)
  * If a big structure is declared in a big function, lx106 gcc will make it
  * even bigger (round up to 4k, from 700 bytes of actual size).
  */
 #ifdef MG_ESP8266
 static void http_handler2(struct mg_connection *nc, int ev, void *ev_data,
                           struct http_message *hm) __attribute__((noinline));
 void http_handler(struct mg_connection *nc, int ev, void *ev_data) {
   struct http_message hm;
   http_handler2(nc, ev, ev_data, &hm);
+}
 static void http_handler2(struct mg_connection *nc, int ev, void *ev_data,
                           struct http_message *hm) {
 #else
 void http_handler(struct mg_connection *nc, int ev, void *ev_data) {
   struct http_message shm;
   struct http_message *hm = &shm;
 #endif
   struct mbuf *io = &nc->recv_mbuf;
   int req_len;
   const int is_req = (nc->listener != NULL);
 #ifndef MG_DISABLE_HTTP_WEBSOCKET
   struct mg_str *vec;
 #endif
   if (ev == MG_EV_CLOSE) {
     /*
      * For HTTP messages without Content-Length, always send HTTP message
      * before MG_EV_CLOSE message.
      */
     if (io->len > 0 && mg_parse_http(io->buf, io->len, hm, is_req) > 0) {
       int ev2 = is_req ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY;
       hm->message.len = io->len;
       hm->body.len = io->buf + io->len - hm->body.p;
       mg_call(nc, nc->handler, ev2, hm);
+    }
     free_http_proto_data(nc);
+  }
   if (nc->proto_data != NULL) {
     transfer_file_data(nc);
+  }
   mg_call(nc, nc->handler, ev, ev_data);
   if (ev == MG_EV_RECV) {
     struct mg_str *s;
     req_len = mg_parse_http(io->buf, io->len, hm, is_req);
     if (req_len > 0 &&
         (s = mg_get_http_header(hm, "Transfer-Encoding")) != NULL &&
         mg_vcasecmp(s, "chunked") == 0) {
       mg_handle_chunked(nc, hm, io->buf + req_len, io->len - req_len);
+    }
     if (req_len < 0 || (req_len == 0 && io->len >= MG_MAX_HTTP_REQUEST_SIZE)) {
       DBG(("invalid request"));
       nc->flags |= MG_F_CLOSE_IMMEDIATELY;
     } else if (req_len == 0) {
       /* Do nothing, request is not yet fully buffered */
+    }
 #ifndef MG_DISABLE_HTTP_WEBSOCKET
     else if (nc->listener == NULL &&
              mg_get_http_header(hm, "Sec-WebSocket-Accept")) {
       /* We're websocket client, got handshake response from server. */
       /* TODO(lsm): check the validity of accept Sec-WebSocket-Accept */
       mbuf_remove(io, req_len);
       nc->proto_handler = websocket_handler;
       nc->flags |= MG_F_IS_WEBSOCKET;
       mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_DONE, NULL);
       websocket_handler(nc, MG_EV_RECV, ev_data);
     } else if (nc->listener != NULL &&
                (vec = mg_get_http_header(hm, "Sec-WebSocket-Key")) != NULL) {
       /* This is a websocket request. Switch protocol handlers. */
       mbuf_remove(io, req_len);
       nc->proto_handler = websocket_handler;
       nc->flags |= MG_F_IS_WEBSOCKET;
       /* Send handshake */
       mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_REQUEST, hm);
       if (!(nc->flags & MG_F_CLOSE_IMMEDIATELY)) {
         if (nc->send_mbuf.len == 0) {
           ws_handshake(nc, vec);
+        }
         mg_call(nc, nc->handler, MG_EV_WEBSOCKET_HANDSHAKE_DONE, NULL);
         websocket_handler(nc, MG_EV_RECV, ev_data);
+      }
+    }
 #endif /* MG_DISABLE_HTTP_WEBSOCKET */
     else if (hm->message.len <= io->len) {
       int trigger_ev = nc->listener ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY;
 /* Whole HTTP message is fully buffered, call event handler */
 #ifdef MG_ENABLE_JAVASCRIPT
       v7_val_t v1, v2, headers, req, args, res;
       struct v7 *v7 = nc->mgr->v7;
       const char *ev_name = trigger_ev == MG_EV_HTTP_REPLY ? "onsnd" : "onrcv";
       int i, js_callback_handled_request = 0;
       if (v7 != NULL) {
         /* Lookup JS callback */
         v1 = v7_get(v7, v7_get_global(v7), "Http", ~0);
         v2 = v7_get(v7, v1, ev_name, ~0);
         /* Create callback params. TODO(lsm): own/disown those */
         args = v7_create_array(v7);
         req = v7_create_object(v7);
         headers = v7_create_object(v7);
         /* Populate request object */
         v7_set(v7, req, "method", ~0, 0,
                v7_create_string(v7, hm->method.p, hm->method.len, 1));
         v7_set(v7, req, "uri", ~0, 0,
                v7_create_string(v7, hm->uri.p, hm->uri.len, 1));
         v7_set(v7, req, "body", ~0, 0,
                v7_create_string(v7, hm->body.p, hm->body.len, 1));
         v7_set(v7, req, "headers", ~0, 0, headers);
         for (i = 0; hm->header_names[i].len > 0; i++) {
           const struct mg_str *name = &hm->header_names[i];
           const struct mg_str *value = &hm->header_values[i];
           v7_set(v7, headers, name->p, name->len, 0,
                  v7_create_string(v7, value->p, value->len, 1));
+        }
         /* Invoke callback. TODO(lsm): report errors */
         v7_array_push(v7, args, v7_create_foreign(nc));
         v7_array_push(v7, args, req);
         if (v7_apply(v7, &res, v2, v7_create_undefined(), args) == V7_OK &&
             v7_is_true(v7, res)) {
           js_callback_handled_request++;
+        }
+      }
       /* If JS callback returns true, stop request processing */
       if (js_callback_handled_request) {
         nc->flags |= MG_F_SEND_AND_CLOSE;
       } else {
     result = -1;
     SetLastError(ERROR_BAD_ARGUMENTS);
         mg_call(nc, nc->handler, trigger_ev, hm);
+      }
 #else
       mg_call(nc, nc->handler, trigger_ev, hm);
 #endif
       mbuf_remove(io, hm->message.len);
+    }
+  }
+}
   return result;
 void mg_set_protocol_http_websocket(struct mg_connection *nc) {
   nc->proto_handler = http_handler;
+}
 static struct dirent *readdir(DIR *dir) {
   struct dirent *result = 0;
 #ifndef MG_DISABLE_HTTP_WEBSOCKET
   if (dir) {
     if (dir->handle != INVALID_HANDLE_VALUE) {
       result = &dir->result;
       (void) WideCharToMultiByte(CP_UTF8, 0,
           dir->info.cFileName, -1, result->d_name,
           sizeof(result->d_name), NULL, NULL);
 void mg_send_websocket_handshake(struct mg_connection *nc, const char *uri,
                                  const char *extra_headers) {
   unsigned long random = (unsigned long) uri;
   char key[sizeof(random) * 3];
       if (!FindNextFileW(dir->handle, &dir->info)) {
         (void) FindClose(dir->handle);
         dir->handle = INVALID_HANDLE_VALUE;
   mg_base64_encode((unsigned char *) &random, sizeof(random), key);
   mg_printf(nc,
             "GET %s HTTP/1.1\r\n"
             "Upgrade: websocket\r\n"
             "Connection: Upgrade\r\n"
             "Sec-WebSocket-Version: 13\r\n"
             "Sec-WebSocket-Key: %s\r\n"
             "%s\r\n",
             uri, key, extra_headers == NULL ? "" : extra_headers);
+}
 #endif /* MG_DISABLE_HTTP_WEBSOCKET */
 #ifndef MG_DISABLE_FILESYSTEM
 void mg_send_response_line(struct mg_connection *nc, int status_code,
                            const char *extra_headers) {
   const char *status_message = "OK";
   switch (status_code) {
     case 206:
       status_message = "Partial Content";
       break;
     case 301:
       status_message = "Moved";
       break;
     case 302:
       status_message = "Found";
       break;
     case 416:
       status_message = "Requested range not satisfiable";
       break;
     case 418:
       status_message = "I'm a teapot";
       break;
+  }
   mg_printf(nc, "HTTP/1.1 %d %s\r\n", status_code, status_message);
   if (extra_headers != NULL) {
     mg_printf(nc, "%s\r\n", extra_headers);
+  }
+}
 void mg_send_head(struct mg_connection *c, int status_code,
                   int64_t content_length, const char *extra_headers) {
   mg_send_response_line(c, status_code, extra_headers);
   if (content_length < 0) {
     mg_printf(c, "%s", "Transfer-Encoding: chunked\r\n");
   } else {
     mg_printf(c, "Content-Length: %" INT64_FMT "\r\n", content_length);
+  }
   mg_send(c, "\r\n", 2);
+}
 static void send_http_error(struct mg_connection *nc, int code,
                             const char *reason) {
   if (reason == NULL) {
     reason = "";
+  }
   mg_printf(nc, "HTTP/1.1 %d %s\r\nContent-Length: 0\r\n\r\n", code, reason);
+}
 #ifndef MG_DISABLE_SSI
 static void send_ssi_file(struct mg_connection *, const char *, FILE *, int,
                           const struct mg_serve_http_opts *);
 static void send_file_data(struct mg_connection *nc, FILE *fp) {
   char buf[BUFSIZ];
   size_t n;
   while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
     mg_send(nc, buf, n);
+  }
+}
     } else {
       SetLastError(ERROR_FILE_NOT_FOUND);
 static void do_ssi_include(struct mg_connection *nc, const char *ssi, char *tag,
                            int include_level,
                            const struct mg_serve_http_opts *opts) {
   char file_name[BUFSIZ], path[MAX_PATH_SIZE], *p;
   FILE *fp;
   /*
    * sscanf() is safe here, since send_ssi_file() also uses buffer
    * of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
    */
   if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
     /* File name is relative to the webserver root */
     snprintf(path, sizeof(path), "%s/%s", opts->document_root, file_name);
   } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
     /*
      * File name is relative to the webserver working directory
      * or it is absolute system path
      */
     snprintf(path, sizeof(path), "%s", file_name);
   } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
              sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
     /* File name is relative to the currect document */
     snprintf(path, sizeof(path), "%s", ssi);
     if ((p = strrchr(path, '/')) != NULL) {
       p[1] = '\0';
+    }
     snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s", file_name);
   } else {
     SetLastError(ERROR_BAD_ARGUMENTS);
     mg_printf(nc, "Bad SSI #include: [%s]", tag);
     return;
+  }
   return result;
   if ((fp = fopen(path, "rb")) == NULL) {
     mg_printf(nc, "SSI include error: fopen(%s): %s", path, strerror(errno));
   } else {
     mg_set_close_on_exec(fileno(fp));
     if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) >
 ) {
       send_ssi_file(nc, path, fp, include_level + 1, opts);
     } else {
       send_file_data(nc, fp);
+    }
     fclose(fp);
+  }
+}
 #define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
 #ifndef MG_DISABLE_POPEN
 static void do_ssi_exec(struct mg_connection *nc, char *tag) {
   char cmd[BUFSIZ];
   FILE *fp;
 int mg_start_thread(mg_thread_func_t f, void *p) {
   return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
   if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
     mg_printf(nc, "Bad SSI #exec: [%s]", tag);
   } else if ((fp = popen(cmd, "r")) == NULL) {
     mg_printf(nc, "Cannot SSI #exec: [%s]: %s", cmd, strerror(errno));
   } else {
     send_file_data(nc, fp);
     pclose(fp);
+  }
 static HANDLE dlopen(const char *dll_name, int flags) {
   wchar_t wbuf[PATH_MAX];
   flags = 0; // Unused
   to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
   return LoadLibraryW(wbuf);
+}
 #endif /* !MG_DISABLE_POPEN */
 #if !defined(NO_CGI)
 #define SIGKILL 0
 static int kill(pid_t pid, int sig_num) {
   (void) TerminateProcess(pid, sig_num);
   (void) CloseHandle(pid);
   return 0;
 static void do_ssi_call(struct mg_connection *nc, char *tag) {
   mg_call(nc, NULL, MG_EV_SSI_CALL, tag);
+}
 static pid_t spawn_process(struct mg_connection *conn, const char *prog,
                            char *envblk, char *envp[], int fd_stdin,
                            int fd_stdout, const char *dir) {
   HANDLE me;
   char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
   FILE *fp;
   STARTUPINFOA si = { sizeof(si) };
   PROCESS_INFORMATION pi = { 0 };
 /*
  * SSI directive has the following format:
  * <!--#directive parameter=value parameter=value -->
  */
 static void send_ssi_file(struct mg_connection *nc, const char *path, FILE *fp,
                           int include_level,
                           const struct mg_serve_http_opts *opts) {
   static const struct mg_str btag = MG_STR("<!--#");
   static const struct mg_str d_include = MG_STR("include");
   static const struct mg_str d_call = MG_STR("call");
 #ifndef MG_DISABLE_POPEN
   static const struct mg_str d_exec = MG_STR("exec");
 #endif
   char buf[BUFSIZ], *p = buf + btag.len; /* p points to SSI directive */
   int ch, offset, len, in_ssi_tag;
   envp = NULL; // Unused
   if (include_level > 10) {
     mg_printf(nc, "SSI #include level is too deep (%s)", path);
     return;
+  }
   // TODO(lsm): redirect CGI errors to the error log file
   si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
   si.wShowWindow = SW_HIDE;
   in_ssi_tag = len = offset = 0;
   while ((ch = fgetc(fp)) != EOF) {
     if (in_ssi_tag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') {
       size_t i = len - 2;
       in_ssi_tag = 0;
   me = GetCurrentProcess();
   (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
       &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
   (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
       &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
       /* Trim closing --> */
       buf[i--] = '\0';
       while (i > 0 && buf[i] == ' ') {
         buf[i--] = '\0';
+      }
   // If CGI file is a script, try to read the interpreter line
   interp = conn->ctx->config[CGI_INTERPRETER];
   if (interp == NULL) {
     buf[2] = '\0';
     mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog);
     if ((fp = fopen(cmdline, "r")) != NULL) {
       (void) fgets(buf, sizeof(buf), fp);
       if (buf[0] != '#' || buf[1] != '!') {
         // First line does not start with "#!". Do not set interpreter.
         buf[2] = '\0';
       /* Handle known SSI directives */
       if (memcmp(p, d_include.p, d_include.len) == 0) {
         do_ssi_include(nc, path, p + d_include.len + 1, include_level, opts);
       } else if (memcmp(p, d_call.p, d_call.len) == 0) {
         do_ssi_call(nc, p + d_call.len + 1);
 #ifndef MG_DISABLE_POPEN
       } else if (memcmp(p, d_exec.p, d_exec.len) == 0) {
         do_ssi_exec(nc, p + d_exec.len + 1);
 #endif
       } else {
         // Trim whitespace in interpreter name
         for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
           *p = '\0';
         /* Silently ignore unknown SSI directive. */
+      }
       len = 0;
     } else if (ch == '<') {
       in_ssi_tag = 1;
       if (len > 0) {
         mg_send(nc, buf, (size_t) len);
+      }
       len = 0;
       buf[len++] = ch & 0xff;
     } else if (in_ssi_tag) {
       if (len == (int) btag.len && memcmp(buf, btag.p, btag.len) != 0) {
         /* Not an SSI tag */
         in_ssi_tag = 0;
       } else if (len == (int) sizeof(buf) - 2) {
         mg_printf(nc, "%s: SSI tag is too large", path);
         len = 0;
+      }
       buf[len++] = ch & 0xff;
     } else {
       buf[len++] = ch & 0xff;
       if (len == (int) sizeof(buf)) {
         mg_send(nc, buf, (size_t) len);
         len = 0;
+      }
       (void) fclose(fp);
+    }
     interp = buf + 2;
+  }
   (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
                      interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
   DEBUG_TRACE(("Running [%s]", cmdline));
   if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
         CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
     cry(conn, "%s: CreateProcess(%s): %d",
         __func__, cmdline, ERRNO);
     pi.hProcess = (pid_t) -1;
   /* Send the rest of buffered data */
   if (len > 0) {
     mg_send(nc, buf, (size_t) len);
+  }
+}
   // Always close these to prevent handle leakage.
   (void) close(fd_stdin);
   (void) close(fd_stdout);
 static void handle_ssi_request(struct mg_connection *nc, const char *path,
                                const struct mg_serve_http_opts *opts) {
   FILE *fp;
   struct mg_str mime_type;
   (void) CloseHandle(si.hStdOutput);
   (void) CloseHandle(si.hStdInput);
   (void) CloseHandle(pi.hThread);
   if ((fp = fopen(path, "rb")) == NULL) {
     send_http_error(nc, 404, "Not Found");
   } else {
     mg_set_close_on_exec(fileno(fp));
   return (pid_t) pi.hProcess;
     mime_type = get_mime_type(path, "text/plain", opts);
     mg_send_response_line(nc, 200, opts->extra_headers);
     mg_printf(nc,
               "Content-Type: %.*s\r\n"
               "Connection: close\r\n\r\n",
               (int) mime_type.len, mime_type.p);
     send_ssi_file(nc, path, fp, 0, opts);
     fclose(fp);
     nc->flags |= MG_F_SEND_AND_CLOSE;
+  }
 #endif // !NO_CGI
 static int set_non_blocking_mode(SOCKET sock) {
   unsigned long on = 1;
   return ioctlsocket(sock, FIONBIO, &on);
+}
 #else
 static int mg_stat(const char *path, struct mgstat *stp) {
   struct stat st;
   int ok;
   if (stat(path, &st) == 0) {
     ok = 0;
     stp->size = st.st_size;
     stp->mtime = st.st_mtime;
     stp->is_directory = S_ISDIR(st.st_mode);
   } else {
     ok = -1;
 static void handle_ssi_request(struct mg_connection *nc, const char *path,
                                const struct mg_serve_http_opts *opts) {
   (void) path;
   (void) opts;
   send_http_error(nc, 500, "SSI disabled");
+}
 #endif /* MG_DISABLE_SSI */
   return ok;
 static void construct_etag(char *buf, size_t buf_len, const cs_stat_t *st) {
   snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", (unsigned long) st->st_mtime,
            (int64_t) st->st_size);
+}
 static void set_close_on_exec(int fd) {
   (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
 static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
   strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
+}
 int mg_start_thread(mg_thread_func_t func, void *param) {
   pthread_t thread_id;
   pthread_attr_t attr;
 static int parse_range_header(const struct mg_str *header, int64_t *a,
                               int64_t *b) {
   /*
    * There is no snscanf. Headers are not guaranteed to be NUL-terminated,
    * so we have this. Ugh.
    */
   int result;
   char *p = (char *) MG_MALLOC(header->len + 1);
   if (p == NULL) return 0;
   memcpy(p, header->p, header->len);
   p[header->len] = '\0';
   result = sscanf(p, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
   MG_FREE(p);
   return result;
+}
   (void) pthread_attr_init(&attr);
   (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
   // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
   // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
   return pthread_create(&thread_id, &attr, func, param);
+}
 #ifndef NO_CGI
 static pid_t spawn_process(struct mg_connection *conn, const char *prog,
                            char *envblk, char *envp[], int fd_stdin,
                            int fd_stdout, const char *dir) {
   pid_t pid;
   const char *interp;
   envblk = NULL; // Unused
   if ((pid = fork()) == -1) {
     // Parent
     send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
   } else if (pid == 0) {
     // Child
     if (chdir(dir) != 0) {
       cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
     } else if (dup2(fd_stdin, 0) == -1) {
       cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
     } else if (dup2(fd_stdout, 1) == -1) {
       cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
 static void mg_send_http_file2(struct mg_connection *nc, const char *path,
                                cs_stat_t *st, struct http_message *hm,
                                struct mg_serve_http_opts *opts) {
   struct proto_data_http *dp;
   struct mg_str mime_type;
   free_http_proto_data(nc);
   if ((dp = (struct proto_data_http *) MG_CALLOC(1, sizeof(*dp))) == NULL) {
     send_http_error(nc, 500, "Server Error"); /* LCOV_EXCL_LINE */
   } else if ((dp->fp = fopen(path, "rb")) == NULL) {
     MG_FREE(dp);
     nc->proto_data = NULL;
     send_http_error(nc, 500, "Server Error");
   } else if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern),
                              path) > 0) {
     nc->proto_data = (void *) dp;
     handle_ssi_request(nc, path, opts);
   } else {
       (void) dup2(fd_stdout, 2);
       (void) close(fd_stdin);
       (void) close(fd_stdout);
     char etag[50], current_time[50], last_modified[50], range[50];
     time_t t = time(NULL);
     int64_t r1 = 0, r2 = 0, cl = st->st_size;
     struct mg_str *range_hdr = mg_get_http_header(hm, "Range");
     int n, status_code = 200;
       interp = conn->ctx->config[CGI_INTERPRETER];
       if (interp == NULL) {
         (void) execle(prog, prog, NULL, envp);
         cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
     /* Handle Range header */
     range[0] = '\0';
     if (range_hdr != NULL &&
         (n = parse_range_header(range_hdr, &r1, &r2)) > 0 && r1 >= 0 &&
         r2 >= 0) {
       /* If range is specified like "400-", set second limit to content len */
       if (n == 1) {
         r2 = cl - 1;
+      }
       if (r1 > r2 || r2 >= cl) {
         status_code = 416;
         cl = 0;
         snprintf(range, sizeof(range),
                  "Content-Range: bytes */%" INT64_FMT "\r\n",
                  (int64_t) st->st_size);
       } else {
         (void) execle(interp, interp, prog, NULL, envp);
         cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
             strerror(ERRNO));
+      }
         status_code = 206;
         cl = r2 - r1 + 1;
         snprintf(range, sizeof(range), "Content-Range: bytes %" INT64_FMT
                                        "-%" INT64_FMT "/%" INT64_FMT "\r\n",
                  r1, r1 + cl - 1, (int64_t) st->st_size);
         fseeko(dp->fp, r1, SEEK_SET);
+      }
+    }
     construct_etag(etag, sizeof(etag), st);
     gmt_time_string(current_time, sizeof(current_time), &t);
     gmt_time_string(last_modified, sizeof(last_modified), &st->st_mtime);
     mime_type = get_mime_type(path, "text/plain", opts);
     /*
      * Content length casted to size_t because:
      * 1) that's the maximum buffer size anyway
      * 2) ESP8266 RTOS SDK newlib vprintf cannot contain a 64bit arg at non-last
      *    position
      * TODO(mkm): fix ESP8266 RTOS SDK
      */
     mg_send_response_line(nc, status_code, opts->extra_headers);
     mg_printf(nc,
               "Date: %s\r\n"
               "Last-Modified: %s\r\n"
               "Accept-Ranges: bytes\r\n"
               "Content-Type: %.*s\r\n"
 #ifdef MG_DISABLE_HTTP_KEEP_ALIVE
               "Connection: close\r\n"
 #endif
               "Content-Length: %" SIZE_T_FMT
               "\r\n"
               "%sEtag: %s\r\n\r\n",
               current_time, last_modified, (int) mime_type.len, mime_type.p,
               (size_t) cl, range, etag);
     nc->proto_data = (void *) dp;
     dp->cl = cl;
     dp->type = DATA_FILE;
     transfer_file_data(nc);
+  }
     exit(EXIT_FAILURE);
+}
   // Parent. Close stdio descriptors
   (void) close(fd_stdin);
   (void) close(fd_stdout);
 static void remove_double_dots(char *s) {
   char *p = s;
   return pid;
   while (*s != '\0') {
     *p++ = *s++;
     if (s[-1] == '/' || s[-1] == '\\') {
       while (s[0] != '\0') {
         if (s[0] == '/' || s[0] == '\\') {
           s++;
         } else if (s[0] == '.' && s[1] == '.') {
           s += 2;
         } else {
           break;
+        }
+      }
+    }
+  }
   *p = '\0';
+}
 #endif // !NO_CGI
 static int set_non_blocking_mode(SOCKET sock) {
   int flags;
 #endif
   flags = fcntl(sock, F_GETFL, 0);
   (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
 static int mg_url_decode(const char *src, int src_len, char *dst, int dst_len,
                          int is_form_url_encoded) {
   int i, j, a, b;
 #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
   return 0;
   for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
     if (src[i] == '%') {
       if (i < src_len - 2 && isxdigit(*(const unsigned char *) (src + i + 1)) &&
           isxdigit(*(const unsigned char *) (src + i + 2))) {
         a = tolower(*(const unsigned char *) (src + i + 1));
         b = tolower(*(const unsigned char *) (src + i + 2));
         dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
         i += 2;
       } else {
         return -1;
+      }
     } else if (is_form_url_encoded && src[i] == '+') {
       dst[j] = ' ';
     } else {
       dst[j] = src[i];
+    }
+  }
 #endif // _WIN32
 // Write data to the IO channel - opened file descriptor, socket or SSL
 // descriptor. Return number of bytes written.
 static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
                     int64_t len) {
   int64_t sent;
   int n, k;
   dst[j] = '\0'; /* Null-terminate the destination */
   sent = 0;
   while (sent < len) {
   return i >= src_len ? j : -1;
+}
     // How many bytes we send in this iteration
     k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
 int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
                     size_t dst_len) {
   const char *p, *e, *s;
   size_t name_len;
   int len;
     if (ssl != NULL) {
       n = SSL_write(ssl, buf + sent, k);
     } else if (fp != NULL) {
       n = (int) fwrite(buf + sent, 1, (size_t) k, fp);
       if (ferror(fp))
         n = -1;
   if (dst == NULL || dst_len == 0) {
     len = -2;
   } else if (buf->p == NULL || name == NULL || buf->len == 0) {
     len = -1;
     dst[0] = '\0';
   } else {
       n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
+    }
     name_len = strlen(name);
     e = buf->p + buf->len;
     len = -1;
     dst[0] = '\0';
     if (n < 0)
     for (p = buf->p; p + name_len < e; p++) {
       if ((p == buf->p || p[-1] == '&') && p[name_len] == '=' &&
           !mg_ncasecmp(name, p, name_len)) {
         p += name_len + 1;
         s = (const char *) memchr(p, '&', (size_t)(e - p));
         if (s == NULL) {
           s = e;
+        }
         len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
         if (len == -1) {
           len = -2;
+        }
         break;
     sent += n;
+      }
   return sent;
+    }
+  }
 // This function is needed to prevent Mongoose to be stuck in a blocking
 // socket read when user requested exit. To do that, we sleep in select
 // with a timeout, and when returned, check the context for the stop flag.
 // If it is set, we return 0, and this means that we must not continue
 // reading, must give up and close the connection and exit serving thread.
 static int wait_until_socket_is_readable(struct mg_connection *conn) {
   int result;
   struct timeval tv;
   fd_set set;
   return len;
+}
   do {
     tv.tv_sec = 0;
     tv.tv_usec = 300 * 1000;
     FD_ZERO(&set);
     FD_SET(conn->client.sock, &set);
     result = select(conn->client.sock + 1, &set, NULL, NULL, &tv);
   } while ((result == 0 || (result < 0 && ERRNO == EINTR)) &&
            conn->ctx->stop_flag == 0);
 void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len) {
   char chunk_size[50];
   int n;
   return conn->ctx->stop_flag || result < 0 ? 0 : 1;
   n = snprintf(chunk_size, sizeof(chunk_size), "%lX\r\n", (unsigned long) len);
   mg_send(nc, chunk_size, n);
   mg_send(nc, buf, len);
   mg_send(nc, "\r\n", 2);
+}
 // Read from IO channel - opened file descriptor, socket, or SSL descriptor.
 // Return negative value on error, or number of bytes read on success.
 static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) {
   int nread;
 void mg_printf_http_chunk(struct mg_connection *nc, const char *fmt, ...) {
   char mem[500], *buf = mem;
   int len;
   va_list ap;
   if (fp != NULL) {
     // Use read() instead of fread(), because if we're reading from the CGI
     // pipe, fread() may block until IO buffer is filled up. We cannot afford
     // to block and must pass all read bytes immediately to the client.
     nread = read(fileno(fp), buf, (size_t) len);
   } else if (!wait_until_socket_is_readable(conn)) {
     nread = -1;
   } else if (conn->ssl != NULL) {
     nread = SSL_read(conn->ssl, buf, len);
   } else {
     nread = recv(conn->client.sock, buf, (size_t) len, 0);
   va_start(ap, fmt);
   len = mg_avprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
   if (len >= 0) {
     mg_send_http_chunk(nc, buf, len);
+  }
   return conn->ctx->stop_flag ? -1 : nread;
   /* LCOV_EXCL_START */
   if (buf != mem && buf != NULL) {
     MG_FREE(buf);
+  }
   /* LCOV_EXCL_STOP */
+}
 int mg_read(struct mg_connection *conn, void *buf, size_t len) {
   int n, buffered_len, nread;
 void mg_printf_html_escape(struct mg_connection *nc, const char *fmt, ...) {
   char mem[500], *buf = mem;
   int i, j, len;
   va_list ap;
   assert(conn->next_request != NULL &&
          conn->body != NULL &&
          conn->next_request >= conn->body);
   nread = 0;
   if (conn->consumed_content < conn->content_len) {
   va_start(ap, fmt);
   len = mg_avprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
     // Adjust number of bytes to read.
     int64_t to_read = conn->content_len - conn->consumed_content;
     if (to_read < (int64_t) len) {
       len = (size_t) to_read;
   if (len >= 0) {
     for (i = j = 0; i < len; i++) {
       if (buf[i] == '<' || buf[i] == '>') {
         mg_send(nc, buf + j, i - j);
         mg_send(nc, buf[i] == '<' ? "&lt;" : "&gt;", 4);
         j = i + 1;
+      }
+    }
     mg_send(nc, buf + j, i - j);
+  }
     // Return buffered data
     buffered_len = conn->next_request - conn->body;
     if (buffered_len > 0) {
       if (len < (size_t) buffered_len) {
         buffered_len = (int) len;
   /* LCOV_EXCL_START */
   if (buf != mem && buf != NULL) {
     MG_FREE(buf);
+  }
       memcpy(buf, conn->body, (size_t) buffered_len);
       len -= buffered_len;
       conn->body += buffered_len;
       conn->consumed_content += buffered_len;
       nread += buffered_len;
       buf = (char *) buf + buffered_len;
   /* LCOV_EXCL_STOP */
+}
     // We have returned all buffered data. Read new data from the remote socket.
     while (len > 0) {
       n = pull(NULL, conn, (char *) buf, (int) len);
       if (n < 0) {
         nread = n;  // Propagate the error
 int mg_http_parse_header(struct mg_str *hdr, const char *var_name, char *buf,
                          size_t buf_size) {
   int ch = ' ', ch1 = ',', len = 0, n = strlen(var_name);
   const char *p, *end = hdr ? hdr->p + hdr->len : NULL, *s = NULL;
   if (buf != NULL && buf_size > 0) buf[0] = '\0';
   if (hdr == NULL) return 0;
   /* Find where variable starts */
   for (s = hdr->p; s != NULL && s + n < end; s++) {
     if ((s == hdr->p || s[-1] == ch || s[-1] == ch1) && s[n] == '=' &&
         !memcmp(s, var_name, n))
       break;
       } else if (n == 0) {
         break;  // No more data to read
       } else {
         buf = (char *) buf + n;
         conn->consumed_content += n;
         nread += n;
         len -= n;
+  }
   if (s != NULL && &s[n + 1] < end) {
     s += n + 1;
     if (*s == '"' || *s == '\'') {
       ch = ch1 = *s++;
+    }
     p = s;
     while (p < end && p[0] != ch && p[0] != ch1 && len < (int) buf_size) {
       if (ch != ' ' && p[0] == '\\' && p[1] == ch) p++;
       buf[len++] = *p++;
+    }
     if (len >= (int) buf_size || (ch != ' ' && *p != ch)) {
       len = 0;
     } else {
       if (len > 0 && s[len - 1] == ',') len--;
       if (len > 0 && s[len - 1] == ';') len--;
       buf[len] = '\0';
+    }
   return nread;
+  }
 int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
   return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
                     (int64_t) len);
   return len;
+}
 int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
   char mem[MG_BUF_LEN], *buf = mem;
   int len;
   va_list ap;
 #ifndef MG_DISABLE_FILESYSTEM
 static int is_file_hidden(const char *path,
                           const struct mg_serve_http_opts *opts) {
   const char *p1 = opts->per_directory_auth_file;
   const char *p2 = opts->hidden_file_pattern;
   /* Strip directory path from the file name */
   const char *pdir = strrchr(path, DIRSEP);
   if (pdir != NULL) {
     path = pdir + 1;
+  }
   return !strcmp(path, ".") || !strcmp(path, "..") ||
          (p1 != NULL && !strcmp(path, p1)) ||
          (p2 != NULL && mg_match_prefix(p2, strlen(p2), path) > 0);
+}
 #ifndef MG_DISABLE_HTTP_DIGEST_AUTH
 static void mkmd5resp(const char *method, size_t method_len, const char *uri,
                       size_t uri_len, const char *ha1, size_t ha1_len,
                       const char *nonce, size_t nonce_len, const char *nc,
                       size_t nc_len, const char *cnonce, size_t cnonce_len,
                       const char *qop, size_t qop_len, char *resp) {
   static const char colon[] = ":";
   static const size_t one = 1;
   char ha2[33];
   cs_md5(ha2, method, method_len, colon, one, uri, uri_len, NULL);
   cs_md5(resp, ha1, ha1_len, colon, one, nonce, nonce_len, colon, one, nc,
          nc_len, colon, one, cnonce, cnonce_len, colon, one, qop, qop_len,
          colon, one, ha2, sizeof(ha2) - 1, NULL);
+}
 int mg_http_create_digest_auth_header(char *buf, size_t buf_len,
                                       const char *method, const char *uri,
                                       const char *auth_domain, const char *user,
                                       const char *passwd) {
   static const char colon[] = ":", qop[] = "auth";
   static const size_t one = 1;
   char ha1[33], resp[33], cnonce[40];
   snprintf(cnonce, sizeof(cnonce), "%x", (unsigned int) time(NULL));
   cs_md5(ha1, user, (size_t) strlen(user), colon, one, auth_domain,
          (size_t) strlen(auth_domain), colon, one, passwd,
          (size_t) strlen(passwd), NULL);
   mkmd5resp(method, strlen(method), uri, strlen(uri), ha1, sizeof(ha1) - 1,
             cnonce, strlen(cnonce), "1", one, cnonce, strlen(cnonce), qop,
             sizeof(qop) - 1, resp);
   return snprintf(buf, buf_len,
                   "Authorization: Digest username=\"%s\","
                   "realm=\"%s\",uri=\"%s\",qop=%s,nc=1,cnonce=%s,"
                   "nonce=%s,response=%s\r\n",
                   user, auth_domain, uri, qop, cnonce, cnonce, resp);
+}
 /*
  * Check for authentication timeout.
  * Clients send time stamp encoded in nonce. Make sure it is not too old,
  * to prevent replay attacks.
  * Assumption: nonce is a hexadecimal number of seconds since 1970.
  */
 static int check_nonce(const char *nonce) {
   unsigned long now = (unsigned long) time(NULL);
   unsigned long val = (unsigned long) strtoul(nonce, NULL, 16);
   return 1 || now < val || now - val < 3600;
+}
 /*
  * Authenticate HTTP request against opened passwords file.
  * Returns 1 if authenticated, 0 otherwise.
  */
 static int mg_http_check_digest_auth(struct http_message *hm,
                                      const char *auth_domain, FILE *fp) {
   struct mg_str *hdr;
   char buf[128], f_user[sizeof(buf)], f_ha1[sizeof(buf)], f_domain[sizeof(buf)];
   char user[50], cnonce[20], response[40], uri[200], qop[20], nc[20], nonce[30];
   char expected_response[33];
   /* Parse "Authorization:" header, fail fast on parse error */
   if (hm == NULL || fp == NULL ||
       (hdr = mg_get_http_header(hm, "Authorization")) == NULL ||
       mg_http_parse_header(hdr, "username", user, sizeof(user)) == 0 ||
       mg_http_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce)) == 0 ||
       mg_http_parse_header(hdr, "response", response, sizeof(response)) == 0 ||
       mg_http_parse_header(hdr, "uri", uri, sizeof(uri)) == 0 ||
       mg_http_parse_header(hdr, "qop", qop, sizeof(qop)) == 0 ||
       mg_http_parse_header(hdr, "nc", nc, sizeof(nc)) == 0 ||
       mg_http_parse_header(hdr, "nonce", nonce, sizeof(nonce)) == 0 ||
       check_nonce(nonce) == 0) {
     return 0;
+  }
   // Print in a local buffer first, hoping that it is large enough to
   // hold the whole message
   va_start(ap, fmt);
   len = vsnprintf(mem, sizeof(mem), fmt, ap);
   va_end(ap);
   /*
    * Read passwords file line by line. If should have htdigest format,
    * i.e. each line should be a colon-separated sequence:
    * USER_NAME:DOMAIN_NAME:HA1_HASH_OF_USER_DOMAIN_AND_PASSWORD
    */
   while (fgets(buf, sizeof(buf), fp) != NULL) {
     if (sscanf(buf, "%[^:]:%[^:]:%s", f_user, f_domain, f_ha1) == 3 &&
         strcmp(user, f_user) == 0 &&
         /* NOTE(lsm): due to a bug in MSIE, we do not compare URIs */
         strcmp(auth_domain, f_domain) == 0) {
       /* User and domain matched, check the password */
       mkmd5resp(hm->method.p, hm->method.len, hm->uri.p, hm->uri.len, f_ha1,
                 strlen(f_ha1), nonce, strlen(nonce), nc, strlen(nc), cnonce,
                 strlen(cnonce), qop, strlen(qop), expected_response);
       return mg_casecmp(response, expected_response) == 0;
+    }
+  }
   if (len <= 0) {
     // vsnprintf() error, give up
     len = -1;
     cry(conn, "%s(%s, ...): vsnprintf() error", __func__, fmt);
   } else if (len > (int) sizeof(mem) && (buf = malloc(len + 1)) != NULL) {
     // Local buffer is not large enough, allocate big buffer on heap
     va_start(ap, fmt);
     vsnprintf(buf, len + 1, fmt, ap);
     va_end(ap);
     len = mg_write(conn, buf, (size_t) len);
     free(buf);
   } else if (len > (int) sizeof(mem)) {
     // Failed to allocate large enough buffer, give up
     cry(conn, "%s(%s, ...): Can't allocate %d bytes, not printing anything",
         __func__, fmt, len);
     len = -1;
   /* None of the entries in the passwords file matched - return failure */
   return 0;
+}
 static int is_authorized(struct http_message *hm, const char *path,
                          int is_directory, const char *domain,
                          const char *passwords_file, int is_global_pass_file) {
   char buf[MAX_PATH_SIZE];
   const char *p;
   FILE *fp;
   int authorized = 1;
   if (domain != NULL && passwords_file != NULL) {
     if (is_global_pass_file) {
       fp = fopen(passwords_file, "r");
     } else if (is_directory) {
       snprintf(buf, sizeof(buf), "%s%c%s", path, DIRSEP, passwords_file);
       fp = fopen(buf, "r");
     } else {
     // Copy to the local buffer succeeded
     len = mg_write(conn, buf, (size_t) len);
       if ((p = strrchr(path, '/')) == NULL &&
           (p = strrchr(path, '\\')) == NULL) {
         p = path;
+      }
       snprintf(buf, sizeof(buf), "%.*s/%s", (int) (p - path), path,
                passwords_file);
       fp = fopen(buf, "r");
+    }
   return len;
     if (fp != NULL) {
       authorized = mg_http_check_digest_auth(hm, domain, fp);
       fclose(fp);
+    }
+  }
 // URL-decode input buffer into destination buffer.
 // 0-terminate the destination buffer. Return the length of decoded data.
 // form-url-encoded data differs from URI encoding in a way that it
 // uses '+' as character for space, see RFC 1866 section 8.2.1
 // http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
 static size_t url_decode(const char *src, size_t src_len, char *dst,
                          size_t dst_len, int is_form_url_encoded) {
   size_t i, j;
   int a, b;
 #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
   return authorized;
+}
 #else
 static int is_authorized(struct http_message *hm, const char *path,
                          int is_directory, const char *domain,
                          const char *passwords_file, int is_global_pass_file) {
   (void) hm;
   (void) path;
   (void) is_directory;
   (void) domain;
   (void) passwords_file;
   (void) is_global_pass_file;
   return 1;
+}
 #endif
   for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
     if (src[i] == '%' &&
         isxdigit(* (const unsigned char *) (src + i + 1)) &&
         isxdigit(* (const unsigned char *) (src + i + 2))) {
       a = tolower(* (const unsigned char *) (src + i + 1));
       b = tolower(* (const unsigned char *) (src + i + 2));
       dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
       i += 2;
     } else if (is_form_url_encoded && src[i] == '+') {
       dst[j] = ' ';
     } else {
 #ifndef MG_DISABLE_DIRECTORY_LISTING
 static size_t mg_url_encode(const char *src, size_t s_len, char *dst,
                             size_t dst_len) {
   static const char *dont_escape = "._-$,;~()";
   static const char *hex = "0123456789abcdef";
   size_t i = 0, j = 0;
   for (i = j = 0; dst_len > 0 && i < s_len && j + 2 < dst_len - 1; i++, j++) {
     if (isalnum(*(const unsigned char *) (src + i)) ||
         strchr(dont_escape, *(const unsigned char *) (src + i)) != NULL) {
       dst[j] = src[i];
     } else if (j + 3 < dst_len) {
       dst[j] = '%';
       dst[j + 1] = hex[(*(const unsigned char *) (src + i)) >> 4];
       dst[j + 2] = hex[(*(const unsigned char *) (src + i)) & 0xf];
       j += 2;
+    }
+  }
   dst[j] = '\0'; // Null-terminate the destination
   dst[j] = '\0';
   return j;
+}
 // Scan given buffer and fetch the value of the given variable.
 // It can be specified in query string, or in the POST data.
 // Return -1 if the variable not found, or length of the URL-decoded value
 // stored in dst. The dst buffer is guaranteed to be NUL-terminated if it
 // is not NULL or zero-length. If dst is NULL or zero-length, then
 // -2 is returned.
 int mg_get_var(const char *buf, size_t buf_len, const char *name,
                char *dst, size_t dst_len) {
   const char *p, *e, *s;
   size_t name_len;
   int len;
   if (dst == NULL || dst_len == 0) {
     len = -2;
   } else if (buf == NULL || name == NULL || buf_len == 0) {
     len = -1;
     dst[0] = '\0';
 static void escape(const char *src, char *dst, size_t dst_len) {
   size_t n = 0;
   while (*src != '\0' && n + 5 < dst_len) {
     unsigned char ch = *(unsigned char *) src++;
     if (ch == '<') {
       n += snprintf(dst + n, dst_len - n, "%s", "&lt;");
     } else {
     name_len = strlen(name);
     e = buf + buf_len;
     len = -1;
     dst[0] = '\0';
       dst[n++] = ch;
+    }
+  }
   dst[n] = '\0';
+}
     // buf is "var1=val1&var2=val2...". Find variable first
     for (p = buf; p + name_len < e; p++) {
       if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
           !mg_strncasecmp(name, p, name_len)) {
 static void print_dir_entry(struct mg_connection *nc, const char *file_name,
                             cs_stat_t *stp) {
   char size[64], mod[64], href[MAX_PATH_SIZE * 3], path[MAX_PATH_SIZE];
   int64_t fsize = stp->st_size;
   int is_dir = S_ISDIR(stp->st_mode);
   const char *slash = is_dir ? "/" : "";
         // Point p to variable value
         p += name_len + 1;
   if (is_dir) {
     snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
   } else {
     /*
      * We use (double) cast below because MSVC 6 compiler cannot
      * convert unsigned __int64 to double.
      */
     if (fsize < 1024) {
       snprintf(size, sizeof(size), "%d", (int) fsize);
     } else if (fsize < 0x100000) {
       snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0);
     } else if (fsize < 0x40000000) {
       snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576);
     } else {
       snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824);
+    }
+  }
   strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime));
   escape(file_name, path, sizeof(path));
   mg_url_encode(file_name, strlen(file_name), href, sizeof(href));
   mg_printf_http_chunk(nc,
                        "<tr><td><a href=\"%s%s\">%s%s</a></td>"
                        "<td>%s</td><td name=%" INT64_FMT ">%s</td></tr>\n",
                        href, slash, path, slash, mod, is_dir ? -1 : fsize,
                        size);
+}
         // Point s to the end of the value
         s = (const char *) memchr(p, '&', (size_t)(e - p));
         if (s == NULL) {
           s = e;
 static void scan_directory(struct mg_connection *nc, const char *dir,
                            const struct mg_serve_http_opts *opts,
                            void (*func)(struct mg_connection *, const char *,
                                         cs_stat_t *)) {
   char path[MAX_PATH_SIZE];
   cs_stat_t st;
   struct dirent *dp;
   DIR *dirp;
   if ((dirp = (opendir(dir))) != NULL) {
     while ((dp = readdir(dirp)) != NULL) {
       /* Do not show current dir and hidden files */
       if (is_file_hidden(dp->d_name, opts)) {
         continue;
+      }
       snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name);
       if (mg_stat(path, &st) == 0) {
         func(nc, dp->d_name, &st);
+      }
+    }
     closedir(dirp);
+  }
+}
 static void send_directory_listing(struct mg_connection *nc, const char *dir,
                                    struct http_message *hm,
                                    struct mg_serve_http_opts *opts) {
   static const char *sort_js_code =
       "<script>function srt(tb, col) {"
       "var tr = Array.prototype.slice.call(tb.rows, 0),"
       "tr = tr.sort(function (a, b) { var c1 = a.cells[col], c2 = b.cells[col],"
       "n1 = c1.getAttribute('name'), n2 = c2.getAttribute('name'), "
       "t1 = a.cells[2].getAttribute('name'), "
       "t2 = b.cells[2].getAttribute('name'); "
       "return t1 < 0 && t2 >= 0 ? -1 : t2 < 0 && t1 >= 0 ? 1 : "
       "n1 ? parseInt(n2) - parseInt(n1) : "
       "c1.textContent.trim().localeCompare(c2.textContent.trim()); });";
   static const char *sort_js_code2 =
       "for (var i = 0; i < tr.length; i++) tb.appendChild(tr[i]);}"
       "window.onload = function() { "
       "var tb = document.getElementById('tb');"
       "document.onclick = function(ev){ "
       "var c = ev.target.rel; if (c) srt(tb, c)}; srt(tb, 2); };</script>";
   mg_send_response_line(nc, 200, opts->extra_headers);
   mg_printf(nc, "%s: %s\r\n%s: %s\r\n\r\n", "Transfer-Encoding", "chunked",
             "Content-Type", "text/html; charset=utf-8");
   mg_printf_http_chunk(
       nc,
       "<html><head><title>Index of %.*s</title>%s%s"
       "<style>th,td {text-align: left; padding-right: 1em; }</style></head>"
       "<body><h1>Index of %.*s</h1><pre><table cellpadding=\"0\"><thead>"
       "<tr><th><a href=# rel=0>Name</a></th><th>"
       "<a href=# rel=1>Modified</a</th>"
       "<th><a href=# rel=2>Size</a></th></tr>"
       "<tr><td colspan=\"3\"><hr></td></tr></thead><tbody id=tb>",
       (int) hm->uri.len, hm->uri.p, sort_js_code, sort_js_code2,
       (int) hm->uri.len, hm->uri.p);
   scan_directory(nc, dir, opts, print_dir_entry);
   mg_printf_http_chunk(nc, "%s", "</tbody></body></html>");
   mg_send_http_chunk(nc, "", 0);
   /* TODO(rojer): Remove when cesanta/dev/issues/197 is fixed. */
   nc->flags |= MG_F_SEND_AND_CLOSE;
+}
 #endif /* MG_DISABLE_DIRECTORY_LISTING */
 #ifndef MG_DISABLE_DAV
 static void print_props(struct mg_connection *nc, const char *name,
                         cs_stat_t *stp) {
   char mtime[64], buf[MAX_PATH_SIZE * 3];
   time_t t = stp->st_mtime; /* store in local variable for NDK compile */
   gmt_time_string(mtime, sizeof(mtime), &t);
   mg_url_encode(name, strlen(name), buf, sizeof(buf));
   mg_printf(nc,
             "<d:response>"
             "<d:href>%s</d:href>"
             "<d:propstat>"
             "<d:prop>"
             "<d:resourcetype>%s</d:resourcetype>"
             "<d:getcontentlength>%" INT64_FMT
             "</d:getcontentlength>"
             "<d:getlastmodified>%s</d:getlastmodified>"
             "</d:prop>"
             "<d:status>HTTP/1.1 200 OK</d:status>"
             "</d:propstat>"
             "</d:response>\n",
             buf, S_ISDIR(stp->st_mode) ? "<d:collection/>" : "",
             (int64_t) stp->st_size, mtime);
+}
         assert(s >= p);
         // Decode variable into destination buffer
         if ((size_t) (s - p) < dst_len) {
           len = (int) url_decode(p, (size_t)(s - p), dst, dst_len, 1);
 static void handle_propfind(struct mg_connection *nc, const char *path,
                             cs_stat_t *stp, struct http_message *hm,
                             struct mg_serve_http_opts *opts) {
   static const char header[] =
       "HTTP/1.1 207 Multi-Status\r\n"
       "Connection: close\r\n"
       "Content-Type: text/xml; charset=utf-8\r\n\r\n"
       "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
       "<d:multistatus xmlns:d='DAV:'>\n";
   static const char footer[] = "</d:multistatus>\n";
   const struct mg_str *depth = mg_get_http_header(hm, "Depth");
   /* Print properties for the requested resource itself */
   if (S_ISDIR(stp->st_mode) &&
       strcmp(opts->enable_directory_listing, "yes") != 0) {
     mg_printf(nc, "%s", "HTTP/1.1 403 Directory Listing Denied\r\n\r\n");
   } else {
     char uri[MAX_PATH_SIZE];
     mg_send(nc, header, sizeof(header) - 1);
     snprintf(uri, sizeof(uri), "%.*s", (int) hm->uri.len, hm->uri.p);
     print_props(nc, uri, stp);
     if (S_ISDIR(stp->st_mode) && (depth == NULL || mg_vcmp(depth, "0") != 0)) {
       scan_directory(nc, path, opts, print_props);
+    }
         break;
     mg_send(nc, footer, sizeof(footer) - 1);
     nc->flags |= MG_F_SEND_AND_CLOSE;
+  }
+}
 static void handle_mkcol(struct mg_connection *nc, const char *path,
                          struct http_message *hm) {
   int status_code = 500;
   if (mg_get_http_header(hm, "Content-Length") != NULL) {
     status_code = 415;
   } else if (!mg_mkdir(path, 0755)) {
     status_code = 201;
   } else if (errno == EEXIST) {
     status_code = 405;
   } else if (errno == EACCES) {
     status_code = 403;
   } else if (errno == ENOENT) {
     status_code = 409;
+  }
   send_http_error(nc, status_code, NULL);
+}
   return len;
 static int remove_directory(const char *dir) {
   char path[MAX_PATH_SIZE];
   struct dirent *dp;
   cs_stat_t st;
   DIR *dirp;
   if ((dirp = opendir(dir)) == NULL) return 0;
   while ((dp = readdir(dirp)) != NULL) {
     if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
     snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
     mg_stat(path, &st);
     if (S_ISDIR(st.st_mode)) {
       remove_directory(path);
     } else {
       remove(path);
+    }
+  }
   closedir(dirp);
   rmdir(dir);
 int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
                   char *dst, size_t dst_size) {
   const char *s, *p, *end;
   int name_len, len = -1;
   return 1;
+}
   dst[0] = '\0';
   if ((s = mg_get_header(conn, "Cookie")) == NULL) {
     return -1;
 static void handle_delete(struct mg_connection *nc, const char *path) {
   cs_stat_t st;
   if (mg_stat(path, &st) != 0) {
     send_http_error(nc, 404, NULL);
   } else if (S_ISDIR(st.st_mode)) {
     remove_directory(path);
     send_http_error(nc, 204, NULL);
   } else if (remove(path) == 0) {
     send_http_error(nc, 204, NULL);
   } else {
     send_http_error(nc, 423, NULL);
+  }
+}
   name_len = (int) strlen(cookie_name);
   end = s + strlen(s);
 /* Return -1 on error, 1 on success. */
 static int create_itermediate_directories(const char *path) {
   const char *s = path;
   for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
     if (s[name_len] == '=') {
       s += name_len + 1;
       if ((p = strchr(s, ' ')) == NULL)
         p = end;
       if (p[-1] == ';')
         p--;
       if (*s == '"' && p[-1] == '"' && p > s + 1) {
         s++;
         p--;
   /* Create intermediate directories if they do not exist */
   while (*s) {
     if (*s == '/') {
       char buf[MAX_PATH_SIZE];
       cs_stat_t st;
       snprintf(buf, sizeof(buf), "%.*s", (int) (s - path), path);
       buf[sizeof(buf) - 1] = '\0';
       if (mg_stat(buf, &st) != 0 && mg_mkdir(buf, 0755) != 0) {
         return -1;
+      }
       if ((size_t) (p - s) < dst_size) {
         len = p - s;
         mg_strlcpy(dst, s, (size_t) len + 1);
+    }
-      break;
+    s++;
+  }
-  return len;
+  return 1;
+}
 static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
                                     size_t buf_len, struct mgstat *st) {
   struct vec a, b;
   const char *rewrite, *uri = conn->request_info.uri;
   char *p;
   int match_len, stat_result;
 static void handle_put(struct mg_connection *nc, const char *path,
                        struct http_message *hm) {
   cs_stat_t st;
   const struct mg_str *cl_hdr = mg_get_http_header(hm, "Content-Length");
   int rc, status_code = mg_stat(path, &st) == 0 ? 200 : 201;
   struct proto_data_http *dp = (struct proto_data_http *) nc->proto_data;
   buf_len--;  // This is because memmove() for PATH_INFO may shift part
               // of the path one byte on the right.
   mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT],
               uri);
   free_http_proto_data(nc);
   if ((rc = create_itermediate_directories(path)) == 0) {
     mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code);
   } else if (rc == -1) {
     send_http_error(nc, 500, NULL);
   } else if (cl_hdr == NULL) {
     send_http_error(nc, 411, NULL);
   } else if ((dp = (struct proto_data_http *) MG_CALLOC(1, sizeof(*dp))) ==
              NULL) {
     send_http_error(nc, 500, NULL); /* LCOV_EXCL_LINE */
   } else if ((dp->fp = fopen(path, "w+b")) == NULL) {
     send_http_error(nc, 500, NULL);
     free_http_proto_data(nc);
   } else {
     const struct mg_str *range_hdr = mg_get_http_header(hm, "Content-Range");
     int64_t r1 = 0, r2 = 0;
     dp->type = DATA_PUT;
     mg_set_close_on_exec(fileno(dp->fp));
     dp->cl = to64(cl_hdr->p);
     if (range_hdr != NULL && parse_range_header(range_hdr, &r1, &r2) > 0) {
       status_code = 206;
       fseeko(dp->fp, r1, SEEK_SET);
       dp->cl = r2 > r1 ? r2 - r1 + 1 : dp->cl - r1;
+    }
     mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code);
     nc->proto_data = dp;
     /* Remove HTTP request from the mbuf, leave only payload */
     mbuf_remove(&nc->recv_mbuf, hm->message.len - hm->body.len);
     transfer_file_data(nc);
+  }
+}
 #endif /* MG_DISABLE_DAV */
 static int is_dav_request(const struct mg_str *s) {
   return !mg_vcmp(s, "PUT") || !mg_vcmp(s, "DELETE") || !mg_vcmp(s, "MKCOL") ||
          !mg_vcmp(s, "PROPFIND");
+}
 /*
  * Given a directory path, find one of the files specified in the
  * comma-separated list of index files `list`.
  * First found index file wins. If an index file is found, then gets
  * appended to the `path`, stat-ed, and result of `stat()` passed to `stp`.
  * If index file is not found, then `path` and `stp` remain unchanged.
  */
 MG_INTERNAL int find_index_file(char *path, size_t path_len, const char *list,
                                 cs_stat_t *stp) {
   cs_stat_t st;
   size_t n = strlen(path);
   struct mg_str vec;
   int found = 0;
   rewrite = conn->ctx->config[REWRITE];
   while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
     if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
       mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len);
       break;
+    }
   /* The 'path' given to us points to the directory. Remove all trailing */
   /* directory separator characters from the end of the path, and */
   /* then append single directory separator character. */
   while (n > 0 && (path[n - 1] == '/' || path[n - 1] == '\\')) {
     n--;
+  }
 #if defined(_WIN32) && !defined(__SYMBIAN32__)
   //change_slashes_to_backslashes(buf);
 #endif // _WIN32
   /* Traverse index files list. For each entry, append it to the given */
   /* path and see if the file exists. If it exists, break the loop */
   while ((list = mg_next_comma_list_entry(list, &vec, NULL)) != NULL) {
     /* Prepare full path to the index file */
     snprintf(path + n, path_len - n, "/%.*s", (int) vec.len, vec.p);
     path[path_len - 1] = '\0';
   if ((stat_result = mg_stat(buf, st)) != 0) {
     // Support PATH_INFO for CGI scripts.
     for (p = buf + strlen(buf); p > buf + 1; p--) {
       if (*p == '/') {
         *p = '\0';
         if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
                          strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
             (stat_result = mg_stat(buf, st)) == 0) {
           // Shift PATH_INFO block one character right, e.g.
           //  "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00"
           // conn->path_info is pointing to the local variable "path" declared
           // in handle_request(), so PATH_INFO is not valid after
           // handle_request returns.
           conn->path_info = p + 1;
           memmove(p + 2, p + 1, strlen(p + 1) + 1);  // +1 is for trailing \0
           p[1] = '/';
     /* Does it exist? */
     if (!mg_stat(path, &st)) {
       /* Yes it does, break the loop */
       *stp = st;
       found = 1;
       break;
         } else {
           *p = '/';
           stat_result = -1;
+        }
+      }
+    }
+  }
   return stat_result;
   /* If no index file exists, restore directory path, keep trailing slash. */
   if (!found) {
     path[n] = '\0';
     strncat(path + n, "/", path_len - n);
+  }
 static int sslize(struct mg_connection *conn, SSL_CTX *s, int (*func)(SSL *)) {
   return (conn->ssl = SSL_new(s)) != NULL &&
     SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
     func(conn->ssl) == 1;
   return found;
+}
 // Check whether full request is buffered. Return:
 //   -1  if request is malformed
 //    0  if request is not yet fully buffered
 //   >0  actual request length, including last \r\n\r\n
 static int get_request_len(const char *buf, int buflen) {
   const char *s, *e;
   int len = 0;
 static int send_port_based_redirect(struct mg_connection *c,
                                     struct http_message *hm,
                                     const struct mg_serve_http_opts *opts) {
   const char *rewrites = opts->url_rewrites;
   struct mg_str a, b;
   char local_port[20] = {'%'};
   for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
     // Control characters are not allowed but >=128 is.
     if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
         *s != '\n' && * (const unsigned char *) s < 128) {
       len = -1;
       break; // [i_a] abort scan as soon as one malformed character is found; don't let subsequent \r\n\r\n win us over anyhow
     } else if (s[0] == '\n' && s[1] == '\n') {
       len = (int) (s - buf) + 2;
     } else if (s[0] == '\n' && &s[1] < e &&
         s[1] == '\r' && s[2] == '\n') {
       len = (int) (s - buf) + 3;
 #ifndef MG_ESP8266
   mg_sock_to_str(c->sock, local_port + 1, sizeof(local_port) - 1,
                  MG_SOCK_STRINGIFY_PORT);
 #else
   /* TODO(lsm): remove when mg_sock_to_str() is implemented in LWIP codepath */
   snprintf(local_port, sizeof(local_port), "%s", "%0");
 #endif
   while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) {
     if (mg_vcmp(&a, local_port) == 0) {
       mg_send_response_line(c, 301, NULL);
       mg_printf(c, "Content-Length: 0\r\nLocation: %.*s%.*s\r\n\r\n",
                 (int) b.len, b.p, (int) (hm->proto.p - hm->uri.p - 1),
                 hm->uri.p);
       return 1;
+    }
+  }
-  return len;
+  return 0;
+}
 // Convert month to the month number. Return -1 on error, or month number
 static int get_month_index(const char *s) {
   size_t i;
 static void uri_to_path(struct http_message *hm, char *buf, size_t buf_len,
                         const struct mg_serve_http_opts *opts) {
   char uri[MG_MAX_PATH];
   struct mg_str a, b, *host_hdr = mg_get_http_header(hm, "Host");
   const char *rewrites = opts->url_rewrites;
   for (i = 0; i < ARRAY_SIZE(month_names); i++)
     if (!strcmp(s, month_names[i]))
       return (int) i;
   mg_url_decode(hm->uri.p, hm->uri.len, uri, sizeof(uri), 0);
   remove_double_dots(uri);
   snprintf(buf, buf_len, "%s%s", opts->document_root, uri);
   return -1;
 #ifndef MG_DISABLE_DAV
   if (is_dav_request(&hm->method) && opts->dav_document_root != NULL) {
     snprintf(buf, buf_len, "%s%s", opts->dav_document_root, uri);
+  }
 #endif
 // Parse UTC date-time string, and return the corresponding time_t value.
 static time_t parse_date_string(const char *datetime) {
   static const unsigned short days_before_month[] = {
 , 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
   };
   char month_str[32];
   int second, minute, hour, day, month, year, leap_days, days;
   time_t result = (time_t) 0;
   if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
                &day, month_str, &year, &hour, &minute, &second) == 6) ||
        (sscanf(datetime, "%d %3s %d %d:%d:%d",
                &day, month_str, &year, &hour, &minute, &second) == 6) ||
        (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
                &day, month_str, &year, &hour, &minute, &second) == 6) ||
        (sscanf(datetime, "%d-%3s-%d %d:%d:%d",
                &day, month_str, &year, &hour, &minute, &second) == 6)) &&
       year > 1970 &&
       (month = get_month_index(month_str)) != -1) {
     year -= 1970;
     leap_days = year / 4 - year / 100 + year / 400;
     days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
     result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
   /* Handle URL rewrites */
   while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) {
     if (a.len > 1 && a.p[0] == '@' && host_hdr != NULL &&
         host_hdr->len == a.len - 1 &&
         mg_ncasecmp(a.p + 1, host_hdr->p, a.len - 1) == 0) {
       /* This is a virtual host rewrite: @domain.name=document_root_dir */
       snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.p, uri);
       break;
     } else {
       /* This is a usual rewrite, URI=directory */
       int match_len = mg_match_prefix(a.p, a.len, uri);
       if (match_len > 0) {
         snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.p, uri + match_len);
         break;
+      }
+    }
+  }
   return result;
+}
 // Protect against directory disclosure attack by removing '..',
 // excessive '/' and '\' characters
 static void remove_double_dots_and_double_slashes(char *s) {
   char *p = s;
 #ifndef MG_DISABLE_CGI
 #ifdef _WIN32
 struct threadparam {
   sock_t s;
   HANDLE hPipe;
 };
   while (*s != '\0') {
     *p++ = *s++;
     if (IS_DIRSEP_CHAR(s[-1])) {
       // Skip all following slashes and backslashes
       while (IS_DIRSEP_CHAR(s[0])) {
         s++;
 static int wait_until_ready(sock_t sock, int for_read) {
   fd_set set;
   FD_ZERO(&set);
   FD_SET(sock, &set);
   return select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0) == 1;
+}
       // Skip all double-dots
       while (*s == '.' && s[1] == '.') {
         s += 2;
+      }
 static void *push_to_stdin(void *arg) {
   struct threadparam *tp = (struct threadparam *) arg;
   int n, sent, stop = 0;
   DWORD k;
   char buf[BUFSIZ];
   while (!stop && wait_until_ready(tp->s, 1) &&
          (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) {
     if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue;
     for (sent = 0; !stop && sent < n; sent += k) {
       if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1;
+    }
+  }
   *p = '\0';
   DBG(("%s", "FORWARED EVERYTHING TO CGI"));
   CloseHandle(tp->hPipe);
   MG_FREE(tp);
   _endthread();
   return NULL;
+}
 static const struct {
   const char *extension;
   size_t ext_len;
   const char *mime_type;
 } builtin_mime_types[] = {
   {".html", 5, "text/html"},
   {".htm", 4, "text/html"},
   {".shtm", 5, "text/html"},
   {".shtml", 6, "text/html"},
   {".css", 4, "text/css"},
   {".js",  3, "application/x-javascript"},
   {".ico", 4, "image/x-icon"},
   {".gif", 4, "image/gif"},
   {".jpg", 4, "image/jpeg"},
   {".jpeg", 5, "image/jpeg"},
   {".png", 4, "image/png"},
   {".svg", 4, "image/svg+xml"},
   {".txt", 4, "text/plain"},
   {".torrent", 8, "application/x-bittorrent"},
   {".wav", 4, "audio/x-wav"},
   {".mp3", 4, "audio/x-mp3"},
   {".mid", 4, "audio/mid"},
   {".m3u", 4, "audio/x-mpegurl"},
   {".ram", 4, "audio/x-pn-realaudio"},
   {".xml", 4, "text/xml"},
   {".json",  5, "text/json"},
   {".xslt", 5, "application/xml"},
   {".ra",  3, "audio/x-pn-realaudio"},
   {".doc", 4, "application/msword"},
   {".exe", 4, "application/octet-stream"},
   {".zip", 4, "application/x-zip-compressed"},
   {".xls", 4, "application/excel"},
   {".tgz", 4, "application/x-tar-gz"},
   {".tar", 4, "application/x-tar"},
   {".gz",  3, "application/x-gunzip"},
   {".arj", 4, "application/x-arj-compressed"},
   {".rar", 4, "application/x-arj-compressed"},
   {".rtf", 4, "application/rtf"},
   {".pdf", 4, "application/pdf"},
   {".swf", 4, "application/x-shockwave-flash"},
   {".mpg", 4, "video/mpeg"},
   {".webm", 5, "video/webm"},
   {".mpeg", 5, "video/mpeg"},
   {".mp4", 4, "video/mp4"},
   {".m4v", 4, "video/x-m4v"},
   {".asf", 4, "video/x-ms-asf"},
   {".avi", 4, "video/x-msvideo"},
   {".bmp", 4, "image/bmp"},
   {NULL,  0, NULL}
 };
 const char *mg_get_builtin_mime_type(const char *path) {
   const char *ext;
   size_t i, path_len;
 static void *pull_from_stdout(void *arg) {
   struct threadparam *tp = (struct threadparam *) arg;
   int k = 0, stop = 0;
   DWORD n, sent;
   char buf[BUFSIZ];
   path_len = strlen(path);
   while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) {
     for (sent = 0; !stop && sent < n; sent += k) {
       if (wait_until_ready(tp->s, 0) &&
           (k = send(tp->s, buf + sent, n - sent, 0)) <= 0)
         stop = 1;
+    }
+  }
   DBG(("%s", "EOF FROM CGI"));
   CloseHandle(tp->hPipe);
   shutdown(tp->s, 2);  // Without this, IO thread may get truncated data
   closesocket(tp->s);
   MG_FREE(tp);
   _endthread();
   return NULL;
+}
   for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
     ext = path + (path_len - builtin_mime_types[i].ext_len);
     if (path_len > builtin_mime_types[i].ext_len &&
         mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
       return builtin_mime_types[i].mime_type;
 static void spawn_stdio_thread(sock_t sock, HANDLE hPipe,
                                void *(*func)(void *)) {
   struct threadparam *tp = (struct threadparam *) MG_MALLOC(sizeof(*tp));
   if (tp != NULL) {
     tp->s = sock;
     tp->hPipe = hPipe;
     mg_start_thread(func, tp);
+  }
+}
   return "text/plain";
 static void abs_path(const char *utf8_path, char *abs_path, size_t len) {
   wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE];
   to_wchar(utf8_path, buf, ARRAY_SIZE(buf));
   GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL);
   WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0);
+}
 // Look at the "path" extension and figure what mime type it has.
 // Store mime type in the vector.
 static void get_mime_type(struct mg_context *ctx, const char *path,
                           struct vec *vec) {
   struct vec ext_vec, mime_vec;
   const char *list, *ext;
   size_t path_len;
 static pid_t start_process(const char *interp, const char *cmd, const char *env,
                            const char *envp[], const char *dir, sock_t sock) {
   STARTUPINFOW si;
   PROCESS_INFORMATION pi;
   HANDLE a[2], b[2], me = GetCurrentProcess();
   wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE];
   char buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE],
       buf4[MAX_PATH_SIZE], cmdline[MAX_PATH_SIZE];
   DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS;
   FILE *fp;
   path_len = strlen(path);
   memset(&si, 0, sizeof(si));
   memset(&pi, 0, sizeof(pi));
   // Scan user-defined mime types first, in case user wants to
   // override default mime types.
   list = ctx->config[EXTRA_MIME_TYPES];
   while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
     // ext now points to the path suffix
     ext = path + path_len - ext_vec.len;
     if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
       *vec = mime_vec;
       return;
   si.cb = sizeof(si);
   si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
   si.wShowWindow = SW_HIDE;
   si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
   CreatePipe(&a[0], &a[1], NULL, 0);
   CreatePipe(&b[0], &b[1], NULL, 0);
   DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags);
   DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags);
   if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) {
     buf[0] = buf[1] = '\0';
     fgets(buf, sizeof(buf), fp);
     buf[sizeof(buf) - 1] = '\0';
     if (buf[0] == '#' && buf[1] == '!') {
       interp = buf + 2;
       /* Trim leading spaces: https://github.com/cesanta/mongoose/issues/489 */
       while (*interp != '\0' && isspace(*(unsigned char *) interp)) {
         interp++;
+      }
+    }
   vec->ptr = mg_get_builtin_mime_type(path);
   vec->len = strlen(vec->ptr);
     fclose(fp);
+  }
 #ifndef HAVE_MD5
 typedef struct MD5Context {
   uint32_t buf[4];
   uint32_t bits[2];
   unsigned char in[64];
 } MD5_CTX;
   snprintf(buf, sizeof(buf), "%s/%s", dir, cmd);
   abs_path(buf, buf2, ARRAY_SIZE(buf2));
 #if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
 #define byteReverse(buf, len) // Do nothing
 #else
 static void byteReverse(unsigned char *buf, unsigned longs) {
   uint32_t t;
   do {
     t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
       ((unsigned) buf[1] << 8 | buf[0]);
     *(uint32_t *) buf = t;
     buf += 4;
   } while (--longs);
   abs_path(dir, buf5, ARRAY_SIZE(buf5));
   to_wchar(dir, full_dir, ARRAY_SIZE(full_dir));
   if (interp != NULL) {
     abs_path(interp, buf4, ARRAY_SIZE(buf4));
     snprintf(cmdline, sizeof(cmdline), "%s \"%s\"", buf4, buf2);
   } else {
     snprintf(cmdline, sizeof(cmdline), "\"%s\"", buf2);
+  }
-#endif
+  to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd));
 #define F1(x, y, z) (z ^ (x & (y ^ z)))
 #define F2(x, y, z) F1(z, x, y)
 #define F3(x, y, z) (x ^ y ^ z)
 #define F4(x, y, z) (y ^ (x | ~z))
 #if 0
   printf("[%ls] [%ls]\n", full_dir, wcmd);
 #endif
 #define MD5STEP(f, w, x, y, z, data, s) \
   ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
   if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP,
                      (void *) env, full_dir, &si, &pi) != 0) {
     spawn_stdio_thread(sock, a[1], push_to_stdin);
     spawn_stdio_thread(sock, b[0], pull_from_stdout);
   } else {
     CloseHandle(a[1]);
     CloseHandle(b[0]);
     closesocket(sock);
+  }
   DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess));
 // Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
 // initialization constants.
 static void MD5Init(MD5_CTX *ctx) {
   ctx->buf[0] = 0x67452301;
   ctx->buf[1] = 0xefcdab89;
   ctx->buf[2] = 0x98badcfe;
   ctx->buf[3] = 0x10325476;
   /* Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE */
   CloseHandle(si.hStdOutput);
   CloseHandle(si.hStdInput);
   /* TODO(lsm): check if we need close process and thread handles too */
   /* CloseHandle(pi.hThread); */
   /* CloseHandle(pi.hProcess); */
   ctx->bits[0] = 0;
   ctx->bits[1] = 0;
   return pi.hProcess;
+}
 #else
 static pid_t start_process(const char *interp, const char *cmd, const char *env,
                            const char *envp[], const char *dir, sock_t sock) {
   char buf[500];
   pid_t pid = fork();
   (void) env;
   if (pid == 0) {
     /*
      * In Linux `chdir` declared with `warn_unused_result` attribute
      * To shutup compiler we have yo use result in some way
      */
     int tmp = chdir(dir);
     (void) tmp;
     (void) dup2(sock, 0);
     (void) dup2(sock, 1);
     closesocket(sock);
 static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
   register uint32_t a, b, c, d;
     /*
      * After exec, all signal handlers are restored to their default values,
      * with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's
      * implementation, SIGCHLD's handler will leave unchanged after exec
      * if it was set to be ignored. Restore it to default action.
      */
     signal(SIGCHLD, SIG_DFL);
   a = buf[0];
   b = buf[1];
   c = buf[2];
   d = buf[3];
     if (interp == NULL) {
       execle(cmd, cmd, (char *) 0, envp); /* (char *) 0 to squash warning */
     } else {
       execle(interp, interp, cmd, (char *) 0, envp);
+    }
     snprintf(buf, sizeof(buf),
              "Status: 500\r\n\r\n"
              "500 Server Error: %s%s%s: %s",
              interp == NULL ? "" : interp, interp == NULL ? "" : " ", cmd,
              strerror(errno));
     send(1, buf, strlen(buf), 0);
     exit(EXIT_FAILURE); /* exec call failed */
+  }
   MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
   MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
   MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
   MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
   MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
   MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
   MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
   MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
   MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
   MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
   MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
   MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
   MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
   MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
   MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
   MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
   return pid;
+}
 #endif /* _WIN32 */
   MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
   MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
   MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
   MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
   MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
   MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
   MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
   MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
   MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
   MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
   MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
   MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
   MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
   MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
   MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
   MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
 /*
  * Append VARIABLE=VALUE\0 string to the buffer, and add a respective
  * pointer into the vars array.
  */
 static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
   int n, space;
   char *added = block->buf + block->len;
   va_list ap;
   MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
   MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
   MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
   MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
   MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
   MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
   MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
   MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
   MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
   MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
   MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
   MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
   MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
   MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
   MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
   MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
   /* Calculate how much space is left in the buffer */
   space = sizeof(block->buf) - (block->len + 2);
   if (space > 0) {
     /* Copy VARIABLE=VALUE\0 string into the free space */
     va_start(ap, fmt);
     n = vsnprintf(added, (size_t) space, fmt, ap);
     va_end(ap);
   MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
   MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
   MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
   MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
   MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
   MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
   MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
   MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
   MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
   MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
   MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
   MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
   MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
   MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
   MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
   MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
     /* Make sure we do not overflow buffer and the envp array */
     if (n > 0 && n + 1 < space &&
         block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
       /* Append a pointer to the added string into the envp array */
       block->vars[block->nvars++] = added;
       /* Bump up used length counter. Include \0 terminator */
       block->len += n + 1;
+    }
+  }
   buf[0] += a;
   buf[1] += b;
   buf[2] += c;
   buf[3] += d;
   return added;
+}
 static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
   uint32_t t;
 static void addenv2(struct cgi_env_block *blk, const char *name) {
   const char *s;
   if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s);
+}
   t = ctx->bits[0];
   if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
     ctx->bits[1]++;
   ctx->bits[1] += len >> 29;
 static void prepare_cgi_environment(struct mg_connection *nc, const char *prog,
                                     const struct http_message *hm,
                                     const struct mg_serve_http_opts *opts,
                                     struct cgi_env_block *blk) {
   const char *s, *slash;
   struct mg_str *h;
   char *p;
   size_t i;
   t = (t >> 3) & 0x3f;
   blk->len = blk->nvars = 0;
   blk->nc = nc;
   if (t) {
     unsigned char *p = (unsigned char *) ctx->in + t;
   if ((s = getenv("SERVER_NAME")) != NULL) {
     addenv(blk, "SERVER_NAME=%s", s);
   } else {
     char buf[100];
     mg_sock_to_str(nc->sock, buf, sizeof(buf), 3);
     addenv(blk, "SERVER_NAME=%s", buf);
+  }
   addenv(blk, "SERVER_ROOT=%s", opts->document_root);
   addenv(blk, "DOCUMENT_ROOT=%s", opts->document_root);
   addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MG_VERSION);
     t = 64 - t;
     if (len < t) {
       memcpy(p, buf, len);
       return;
   /* Prepare the environment block */
   addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
   addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
   addenv(blk, "%s", "REDIRECT_STATUS=200"); /* For PHP */
   /* TODO(lsm): fix this for IPv6 case */
   /*addenv(blk, "SERVER_PORT=%d", ri->remote_port); */
   addenv(blk, "REQUEST_METHOD=%.*s", (int) hm->method.len, hm->method.p);
 #if 0
   addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip);
   addenv(blk, "REMOTE_PORT=%d", ri->remote_port);
 #endif
   addenv(blk, "REQUEST_URI=%.*s%s%.*s", (int) hm->uri.len, hm->uri.p,
          hm->query_string.len == 0 ? "" : "?", (int) hm->query_string.len,
          hm->query_string.p);
 /* SCRIPT_NAME */
 #if 0
   if (nc->path_info != NULL) {
     addenv(blk, "SCRIPT_NAME=%.*s",
            (int) (strlen(ri->uri) - strlen(nc->path_info)), ri->uri);
     addenv(blk, "PATH_INFO=%s", nc->path_info);
   } else {
 #endif
   s = strrchr(prog, '/');
   slash = hm->uri.p + hm->uri.len;
   while (slash > hm->uri.p && *slash != '/') {
     slash--;
+  }
     memcpy(p, buf, t);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     buf += t;
     len -= t;
   addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - hm->uri.p), hm->uri.p,
          s == NULL ? prog : s);
 #if 0
+  }
   while (len >= 64) {
     memcpy(ctx->in, buf, 64);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     buf += 64;
     len -= 64;
 #endif
   addenv(blk, "SCRIPT_FILENAME=%s", prog);
   addenv(blk, "PATH_TRANSLATED=%s", prog);
   addenv(blk, "HTTPS=%s", nc->ssl != NULL ? "on" : "off");
   if ((h = mg_get_http_header((struct http_message *) hm, "Content-Type")) !=
       NULL) {
     addenv(blk, "CONTENT_TYPE=%.*s", (int) h->len, h->p);
+  }
   memcpy(ctx->in, buf, len);
   if (hm->query_string.len > 0) {
     addenv(blk, "QUERY_STRING=%.*s", (int) hm->query_string.len,
            hm->query_string.p);
+  }
 static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
   unsigned count;
   unsigned char *p;
   if ((h = mg_get_http_header((struct http_message *) hm, "Content-Length")) !=
       NULL) {
     addenv(blk, "CONTENT_LENGTH=%.*s", (int) h->len, h->p);
+  }
   count = (ctx->bits[0] >> 3) & 0x3F;
   addenv2(blk, "PATH");
   addenv2(blk, "TMP");
   addenv2(blk, "TEMP");
   addenv2(blk, "TMPDIR");
   addenv2(blk, "PERLLIB");
   addenv2(blk, MG_ENV_EXPORT_TO_CGI);
   p = ctx->in + count;
   *p++ = 0x80;
   count = 64 - 1 - count;
   if (count < 8) {
     memset(p, 0, count);
     byteReverse(ctx->in, 16);
     MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     memset(ctx->in, 0, 56);
   } else {
     memset(p, 0, count - 8);
+  }
   byteReverse(ctx->in, 14);
 #if defined(_WIN32)
   addenv2(blk, "COMSPEC");
   addenv2(blk, "SYSTEMROOT");
   addenv2(blk, "SystemDrive");
   addenv2(blk, "ProgramFiles");
   addenv2(blk, "ProgramFiles(x86)");
   addenv2(blk, "CommonProgramFiles(x86)");
 #else
   addenv2(blk, "LD_LIBRARY_PATH");
 #endif /* _WIN32 */
   ((uint32_t *) ctx->in)[14] = ctx->bits[0];
   ((uint32_t *) ctx->in)[15] = ctx->bits[1];
   /* Add all headers as HTTP_* variables */
   for (i = 0; hm->header_names[i].len > 0; i++) {
     p = addenv(blk, "HTTP_%.*s=%.*s", (int) hm->header_names[i].len,
                hm->header_names[i].p, (int) hm->header_values[i].len,
                hm->header_values[i].p);
   MD5Transform(ctx->buf, (uint32_t *) ctx->in);
   byteReverse((unsigned char *) ctx->buf, 4);
   memcpy(digest, ctx->buf, 16);
   memset((char *) ctx, 0, sizeof(*ctx));
     /* Convert variable name into uppercase, and change - to _ */
     for (; *p != '=' && *p != '\0'; p++) {
       if (*p == '-') *p = '_';
       *p = (char) toupper(*(unsigned char *) p);
+    }
+  }
 #endif // !HAVE_MD5
 // Stringify binary data. Output buffer must be twice as big as input,
 // because each byte takes 2 bytes in string representation
 static void bin2str(char *to, const unsigned char *p, size_t len) {
   static const char *hex = "0123456789abcdef";
   blk->vars[blk->nvars++] = NULL;
   blk->buf[blk->len++] = '\0';
+}
   for (; len--; p++) {
     *to++ = hex[p[0] >> 4];
     *to++ = hex[p[0] & 0x0f];
 static void cgi_ev_handler(struct mg_connection *cgi_nc, int ev,
                            void *ev_data) {
   struct mg_connection *nc = (struct mg_connection *) cgi_nc->user_data;
   (void) ev_data;
   if (nc == NULL) return;
   switch (ev) {
     case MG_EV_RECV:
       /*
        * CGI script does not output reply line, like "HTTP/1.1 CODE XXXXX\n"
        * It outputs headers, then body. Headers might include "Status"
        * header, which changes CODE, and it might include "Location" header
        * which changes CODE to 302.
+       *
        * Therefore we do not send the output from the CGI script to the user
        * until all CGI headers are received.
+       *
        * Here we parse the output from the CGI script, and if all headers has
        * been received, send appropriate reply line, and forward all
        * received headers to the client.
        */
       if (nc->flags & MG_F_USER_1) {
         struct mbuf *io = &cgi_nc->recv_mbuf;
         int len = get_request_len(io->buf, io->len);
         if (len == 0) break;
         if (len < 0 || io->len > MG_MAX_HTTP_REQUEST_SIZE) {
           cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
           send_http_error(nc, 500, "Bad headers");
         } else {
           struct http_message hm;
           struct mg_str *h;
           parse_http_headers(io->buf, io->buf + io->len, io->len, &hm);
           /*printf("=== %d [%.*s]\n", k, k, io->buf);*/
           if (mg_get_http_header(&hm, "Location") != NULL) {
             mg_printf(nc, "%s", "HTTP/1.1 302 Moved\r\n");
           } else if ((h = mg_get_http_header(&hm, "Status")) != NULL) {
             mg_printf(nc, "HTTP/1.1 %.*s\r\n", (int) h->len, h->p);
           } else {
             mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\n");
+          }
+        }
         nc->flags &= ~MG_F_USER_1;
+      }
       if (!(nc->flags & MG_F_USER_1)) {
         mg_forward(cgi_nc, nc);
+      }
       break;
     case MG_EV_CLOSE:
       free_http_proto_data(cgi_nc);
       nc->flags |= MG_F_SEND_AND_CLOSE;
       nc->user_data = NULL;
       break;
+  }
   *to = '\0';
+}
 // Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
 void mg_md5(char buf[33], ...) {
   unsigned char hash[16];
 static void handle_cgi(struct mg_connection *nc, const char *prog,
                        const struct http_message *hm,
                        const struct mg_serve_http_opts *opts) {
   struct proto_data_http *dp;
   struct cgi_env_block blk;
   char dir[MAX_PATH_SIZE];
   const char *p;
   va_list ap;
   MD5_CTX ctx;
   MD5Init(&ctx);
   sock_t fds[2];
   prepare_cgi_environment(nc, prog, hm, opts, &blk);
   /*
    * CGI must be executed in its own directory. 'dir' must point to the
    * directory containing executable program, 'p' must point to the
    * executable program name relative to 'dir'.
    */
   if ((p = strrchr(prog, '/')) == NULL) {
     snprintf(dir, sizeof(dir), "%s", ".");
   } else {
     snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog);
     prog = p + 1;
+  }
   va_start(ap, buf);
   while ((p = va_arg(ap, const char *)) != NULL) {
     MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
   /*
    * Try to create socketpair in a loop until success. mg_socketpair()
    * can be interrupted by a signal and fail.
    * TODO(lsm): use sigaction to restart interrupted syscall
    */
   do {
     mg_socketpair(fds, SOCK_STREAM);
   } while (fds[0] == INVALID_SOCKET);
   free_http_proto_data(nc);
   if ((dp = (struct proto_data_http *) MG_CALLOC(1, sizeof(*dp))) == NULL) {
     send_http_error(nc, 500, "OOM"); /* LCOV_EXCL_LINE */
   } else if (start_process(opts->cgi_interpreter, prog, blk.buf, blk.vars, dir,
                            fds[1]) != 0) {
     size_t n = nc->recv_mbuf.len - (hm->message.len - hm->body.len);
     dp->type = DATA_CGI;
     dp->cgi_nc = mg_add_sock(nc->mgr, fds[0], cgi_ev_handler);
     dp->cgi_nc->user_data = nc;
     dp->cgi_nc->proto_data = dp;
     nc->flags |= MG_F_USER_1;
     /* Push POST data to the CGI */
     if (n > 0 && n < nc->recv_mbuf.len) {
       mg_send(dp->cgi_nc, hm->body.p, n);
+    }
     mbuf_remove(&nc->recv_mbuf, nc->recv_mbuf.len);
   } else {
     closesocket(fds[0]);
     send_http_error(nc, 500, "CGI failure");
+  }
   va_end(ap);
   MD5Final(hash, &ctx);
   bin2str(buf, hash, sizeof(hash));
 #ifndef _WIN32
   closesocket(fds[1]); /* On Windows, CGI stdio thread closes that socket */
 #endif
+}
 #endif
 // Check the user's password, return 1 if OK
 static int check_password(const char *method, const char *ha1, const char *uri,
                           const char *nonce, const char *nc, const char *cnonce,
                           const char *qop, const char *response) {
   char ha2[32 + 1], expected_response[32 + 1];
 static int mg_get_month_index(const char *s) {
   static const char *month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
                                       "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
   size_t i;
   // Some of the parameters may be NULL
   if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
       qop == NULL || response == NULL) {
     return 0;
   for (i = 0; i < ARRAY_SIZE(month_names); i++)
     if (!strcmp(s, month_names[i])) return (int) i;
   return -1;
+}
   // NOTE(lsm): due to a bug in MSIE, we do not compare the URI
   // TODO(lsm): check for authentication timeout
   if (// strcmp(dig->uri, c->ouri) != 0 ||
       strlen(response) != 32
       // || now - strtoul(dig->nonce, NULL, 10) > 3600
       ) {
     return 0;
 static int mg_num_leap_years(int year) {
   return year / 4 - year / 100 + year / 400;
+}
   mg_md5(ha2, method, ":", uri, NULL);
   mg_md5(expected_response, ha1, ":", nonce, ":", nc,
       ":", cnonce, ":", qop, ":", ha2, NULL);
 /* Parse UTC date-time string, and return the corresponding time_t value. */
 MG_INTERNAL time_t mg_parse_date_string(const char *datetime) {
   static const unsigned short days_before_month[] = {
 , 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
   char month_str[32];
   int second, minute, hour, day, month, year, leap_days, days;
   time_t result = (time_t) 0;
   return mg_strcasecmp(response, expected_response) == 0;
   if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", &day, month_str, &year, &hour,
                &minute, &second) == 6) ||
        (sscanf(datetime, "%d %3s %d %d:%d:%d", &day, month_str, &year, &hour,
                &minute, &second) == 6) ||
        (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", &day, month_str, &year,
                &hour, &minute, &second) == 6) ||
        (sscanf(datetime, "%d-%3s-%d %d:%d:%d", &day, month_str, &year, &hour,
                &minute, &second) == 6)) &&
       year > 1970 && (month = mg_get_month_index(month_str)) != -1) {
     leap_days = mg_num_leap_years(year) - mg_num_leap_years(1970);
     year -= 1970;
     days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
     result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
+  }
 // Use the global passwords file, if specified by auth_gpass option,
 // or search for .htpasswd in the requested directory.
 static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
   struct mg_context *ctx = conn->ctx;
   char name[PATH_MAX];
   const char *p, *e;
   struct mgstat st;
   FILE *fp;
   return result;
+}
   if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
     // Use global passwords file
     fp =  mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
     if (fp == NULL)
       cry(fc(ctx), "fopen(%s): %s",
           ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
   } else if (!mg_stat(path, &st) && st.is_directory) {
     (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
         path, DIRSEP, PASSWORDS_FILE_NAME);
     fp = mg_fopen(name, "r");
 MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st) {
   struct mg_str *hdr;
   if ((hdr = mg_get_http_header(hm, "If-None-Match")) != NULL) {
     char etag[64];
     construct_etag(etag, sizeof(etag), st);
     return mg_vcasecmp(hdr, etag) == 0;
   } else if ((hdr = mg_get_http_header(hm, "If-Modified-Since")) != NULL) {
     return st->st_mtime <= mg_parse_date_string(hdr->p);
   } else {
      // Try to find .htpasswd in requested directory.
     for (p = path, e = p + strlen(p) - 1; e > p; e--)
       if (IS_DIRSEP_CHAR(*e))
         break;
     (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
         (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
     fp = mg_fopen(name, "r");
     return 0;
+  }
+}
   return fp;
 static void mg_send_digest_auth_request(struct mg_connection *c,
                                         const char *domain) {
   mg_printf(c,
             "HTTP/1.1 401 Unauthorized\r\n"
             "WWW-Authenticate: Digest qop=\"auth\", "
             "realm=\"%s\", nonce=\"%lu\"\r\n"
             "Content-Length: 0\r\n\r\n",
             domain, (unsigned long) time(NULL));
+}
 void mg_send_http_file(struct mg_connection *nc, char *path,
                        size_t path_buf_len, struct http_message *hm,
                        struct mg_serve_http_opts *opts) {
   int stat_result, is_directory, is_dav = is_dav_request(&hm->method);
   uint32_t remote_ip = ntohl(*(uint32_t *) &nc->sa.sin.sin_addr);
   cs_stat_t st;
   DBG(("serving [%s]", path));
   stat_result = mg_stat(path, &st);
   is_directory = !stat_result && S_ISDIR(st.st_mode);
   if (mg_check_ip_acl(opts->ip_acl, remote_ip) != 1) {
     /* Not allowed to connect */
     nc->flags |= MG_F_CLOSE_IMMEDIATELY;
   } else if (is_dav && opts->dav_document_root == NULL) {
     send_http_error(nc, 501, NULL);
   } else if (!is_authorized(hm, path, is_directory, opts->auth_domain,
                             opts->global_auth_file, 1) ||
              !is_authorized(hm, path, is_directory, opts->auth_domain,
                             opts->per_directory_auth_file, 0)) {
     mg_send_digest_auth_request(nc, opts->auth_domain);
   } else if ((stat_result != 0 || is_file_hidden(path, opts)) && !is_dav) {
     mg_printf(nc, "%s", "HTTP/1.1 404 Not Found\r\nContent-Length: 0\r\n\r\n");
   } else if (is_directory && path[strlen(path) - 1] != '/' && !is_dav) {
     mg_printf(nc,
               "HTTP/1.1 301 Moved\r\nLocation: %.*s/\r\n"
               "Content-Length: 0\r\n\r\n",
               (int) hm->uri.len, hm->uri.p);
 #ifndef MG_DISABLE_DAV
   } else if (!mg_vcmp(&hm->method, "PROPFIND")) {
     handle_propfind(nc, path, &st, hm, opts);
 #ifndef MG_DISABLE_DAV_AUTH
   } else if (is_dav &&
              (opts->dav_auth_file == NULL ||
               !is_authorized(hm, path, is_directory, opts->auth_domain,
                              opts->dav_auth_file, 1))) {
     mg_send_digest_auth_request(nc, opts->auth_domain);
 #endif
   } else if (!mg_vcmp(&hm->method, "MKCOL")) {
     handle_mkcol(nc, path, hm);
   } else if (!mg_vcmp(&hm->method, "DELETE")) {
     handle_delete(nc, path);
   } else if (!mg_vcmp(&hm->method, "PUT")) {
     handle_put(nc, path, hm);
 #endif
   } else if (S_ISDIR(st.st_mode) &&
              !find_index_file(path, path_buf_len, opts->index_files, &st)) {
     if (strcmp(opts->enable_directory_listing, "yes") == 0) {
 #ifndef MG_DISABLE_DIRECTORY_LISTING
       send_directory_listing(nc, path, hm, opts);
 #else
       send_http_error(nc, 501, NULL);
 #endif
     } else {
       send_http_error(nc, 403, NULL);
+    }
   } else if (mg_match_prefix(opts->cgi_file_pattern,
                              strlen(opts->cgi_file_pattern), path) > 0) {
 #if !defined(MG_DISABLE_CGI)
     handle_cgi(nc, path, hm, opts);
 #else
     send_http_error(nc, 501, NULL);
 #endif /* MG_DISABLE_CGI */
   } else if (mg_is_not_modified(hm, &st)) {
     send_http_error(nc, 304, "Not Modified");
   } else {
     mg_send_http_file2(nc, path, &st, hm, opts);
+  }
+}
 // Parsed Authorization header
 struct ah {
   char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
 };
 void mg_serve_http(struct mg_connection *nc, struct http_message *hm,
                    struct mg_serve_http_opts opts) {
   char path[MG_MAX_PATH];
   struct mg_str *hdr;
 // Return 1 on success. Always initializes the ah structure.
 static int parse_auth_header(struct mg_connection *conn, char *buf,
                              size_t buf_size, struct ah *ah) {
   char *name, *value, *s;
   const char *auth_header;
   if (send_port_based_redirect(nc, hm, &opts)) {
     return;
+  }
   (void) memset(ah, 0, sizeof(*ah));
   if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
       mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
     return 0;
   if (opts.document_root == NULL) {
     opts.document_root = ".";
+  }
   if (opts.per_directory_auth_file == NULL) {
     opts.per_directory_auth_file = ".htpasswd";
+  }
   if (opts.enable_directory_listing == NULL) {
     opts.enable_directory_listing = "yes";
+  }
   if (opts.cgi_file_pattern == NULL) {
     opts.cgi_file_pattern = "**.cgi$|**.php$";
+  }
   if (opts.ssi_pattern == NULL) {
     opts.ssi_pattern = "**.shtml$|**.shtm$";
+  }
   if (opts.index_files == NULL) {
     opts.index_files = "index.html,index.htm,index.shtml,index.cgi,index.php";
+  }
   // Make modifiable copy of the auth header
   (void) mg_strlcpy(buf, auth_header + 7, buf_size);
   s = buf;
   uri_to_path(hm, path, sizeof(path), &opts);
   mg_send_http_file(nc, path, sizeof(path), hm, &opts);
   // Parse authorization header
   for (;;) {
     // Gobble initial spaces
     while (isspace(* (unsigned char *) s)) {
       s++;
   /* Close connection for non-keep-alive requests */
   if (mg_vcmp(&hm->proto, "HTTP/1.1") != 0 ||
       ((hdr = mg_get_http_header(hm, "Connection")) != NULL &&
        mg_vcmp(hdr, "keep-alive") != 0)) {
 #if 0
     nc->flags |= MG_F_SEND_AND_CLOSE;
 #endif
+  }
     name = skip_quoted(&s, "=", " ", 0);
     // Value is either quote-delimited, or ends at first comma or space.
     if (s[0] == '\"') {
       s++;
       value = skip_quoted(&s, "\"", " ", '\\');
       if (s[0] == ',') {
         s++;
+}
     } else {
       value = skip_quoted(&s, ", ", " ", 0);  // IE uses commas, FF uses spaces
 #endif /* MG_DISABLE_FILESYSTEM */
 struct mg_connection *mg_connect_http(struct mg_mgr *mgr,
                                       mg_event_handler_t ev_handler,
                                       const char *url,
                                       const char *extra_headers,
                                       const char *post_data) {
   struct mg_connection *nc = NULL;
   char *addr = NULL;
   const char *path = NULL;
   int use_ssl = 0, addr_len = 0, port_i = -1;
   if (memcmp(url, "http://", 7) == 0) {
     url += 7;
   } else if (memcmp(url, "https://", 8) == 0) {
     url += 8;
     use_ssl = 1;
 #ifndef MG_ENABLE_SSL
     return NULL; /* SSL is not enabled, cannot do HTTPS URLs */
 #endif
+  }
   while (*url != '\0') {
     addr = (char *) MG_REALLOC(addr, addr_len + 5 /* space for port too. */);
     if (addr == NULL) {
       DBG(("OOM"));
       return NULL;
+    }
     if (*name == '\0') {
     if (*url == '/') {
       url++;
       break;
+    }
     if (!strcmp(name, "username")) {
       ah->user = value;
     } else if (!strcmp(name, "cnonce")) {
       ah->cnonce = value;
     } else if (!strcmp(name, "response")) {
       ah->response = value;
     } else if (!strcmp(name, "uri")) {
       ah->uri = value;
     } else if (!strcmp(name, "qop")) {
       ah->qop = value;
     } else if (!strcmp(name, "nc")) {
       ah->nc = value;
     } else if (!strcmp(name, "nonce")) {
       ah->nonce = value;
     if (*url == ':') port_i = addr_len;
     addr[addr_len++] = *url;
     addr[addr_len] = '\0';
     url++;
+  }
   if (addr_len == 0) goto cleanup;
   if (port_i < 0) {
     port_i = addr_len;
     strcpy(addr + port_i, use_ssl ? ":443" : ":80");
   } else {
     port_i = -1;
+  }
   // CGI needs it as REMOTE_USER
   if (ah->user != NULL) {
     conn->request_info.remote_user = mg_strdup(ah->user);
   } else {
     return 0;
   if (path == NULL) path = url;
   DBG(("%s %s", addr, path));
   if ((nc = mg_connect(mgr, addr, ev_handler)) != NULL) {
     mg_set_protocol_http_websocket(nc);
     if (use_ssl) {
 #ifdef MG_ENABLE_SSL
       mg_set_ssl(nc, NULL, NULL);
 #endif
+    }
   return 1;
     /* If the port was addred by us, restore the original host. */
     if (port_i >= 0) addr[port_i] = '\0';
     mg_printf(nc, "%s /%s HTTP/1.1\r\nHost: %s\r\nContent-Length: %" SIZE_T_FMT
                   "\r\n%s\r\n%s",
               post_data == NULL ? "GET" : "POST", path, addr,
               post_data == NULL ? 0 : strlen(post_data),
               extra_headers == NULL ? "" : extra_headers,
               post_data == NULL ? "" : post_data);
+  }
 // Authorize against the opened passwords file. Return 1 if authorized.
 static int authorize(struct mg_connection *conn, FILE *fp) {
   struct ah ah;
   char line[256], f_user[256], ha1[256], f_domain[256], buf[MG_BUF_LEN];
 cleanup:
   MG_FREE(addr);
   return nc;
+}
   if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
     return 0;
 static size_t get_line_len(const char *buf, size_t buf_len) {
   size_t len = 0;
   while (len < buf_len && buf[len] != '\n') len++;
   return buf[len] == '\n' ? len + 1 : 0;
+}
   // Loop over passwords file
   while (fgets(line, sizeof(line), fp) != NULL) {
     if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
       continue;
 size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name,
                           size_t var_name_len, char *file_name,
                           size_t file_name_len, const char **data,
                           size_t *data_len) {
   static const char cd[] = "Content-Disposition: ";
   size_t hl, bl, n, ll, pos, cdl = sizeof(cd) - 1;
   if (buf == NULL || buf_len <= 0) return 0;
   if ((hl = get_request_len(buf, buf_len)) <= 0) return 0;
   if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0;
   /* Get boundary length */
   bl = get_line_len(buf, buf_len);
   /* Loop through headers, fetch variable name and file name */
   var_name[0] = file_name[0] = '\0';
   for (n = bl; (ll = get_line_len(buf + n, hl - n)) > 0; n += ll) {
     if (mg_ncasecmp(cd, buf + n, cdl) == 0) {
       struct mg_str header;
       header.p = buf + n + cdl;
       header.len = ll - (cdl + 2);
       mg_http_parse_header(&header, "name", var_name, var_name_len);
       mg_http_parse_header(&header, "filename", file_name, file_name_len);
+    }
+  }
     if (!strcmp(ah.user, f_user) &&
         !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
       return check_password(
             conn->request_info.request_method,
             ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
             ah.response);
   /* Scan through the body, search for terminating boundary */
   for (pos = hl; pos + (bl - 2) < buf_len; pos++) {
     if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) {
       if (data_len != NULL) *data_len = (pos - 2) - hl;
       if (data != NULL) *data = buf + hl;
       return pos;
+    }
+  }
   return 0;
+}
 // Return 1 if request is authorised, 0 otherwise.
 static int check_authorization(struct mg_connection *conn, const char *path) {
   FILE *fp;
   char fname[PATH_MAX];
   struct vec uri_vec, filename_vec;
   const char *list;
   int authorized;
   fp = NULL;
   authorized = 1;
   list = conn->ctx->config[PROTECT_URI];
   while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
     if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
       (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
           filename_vec.len, filename_vec.ptr);
       if ((fp = mg_fopen(fname, "r")) == NULL) {
         cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
 #endif /* MG_DISABLE_HTTP */
 #ifdef NS_MODULE_LINES
 #line 1 "src/util.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /* Amalgamated: #include "internal.h" */
 const char *mg_skip(const char *s, const char *end, const char *delims,
                     struct mg_str *v) {
   v->p = s;
   while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++;
   v->len = s - v->p;
   while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++;
   return s;
+}
       break;
 static int lowercase(const char *s) {
   return tolower(*(const unsigned char *) s);
+}
 int mg_ncasecmp(const char *s1, const char *s2, size_t len) {
   int diff = 0;
   if (len > 0) do {
       diff = lowercase(s1++) - lowercase(s2++);
     } while (diff == 0 && s1[-1] != '\0' && --len > 0);
   return diff;
+}
   if (fp == NULL) {
     fp = open_auth_file(conn, path);
 int mg_casecmp(const char *s1, const char *s2) {
   return mg_ncasecmp(s1, s2, (size_t) ~0);
+}
   if (fp != NULL) {
     authorized = authorize(conn, fp);
     (void) fclose(fp);
 int mg_vcasecmp(const struct mg_str *str1, const char *str2) {
   size_t n2 = strlen(str2), n1 = str1->len;
   int r = mg_ncasecmp(str1->p, str2, (n1 < n2) ? n1 : n2);
   if (r == 0) {
     return n1 - n2;
+  }
   return r;
+}
   return authorized;
 int mg_vcmp(const struct mg_str *str1, const char *str2) {
   size_t n2 = strlen(str2), n1 = str1->len;
   int r = memcmp(str1->p, str2, (n1 < n2) ? n1 : n2);
   if (r == 0) {
     return n1 - n2;
+  }
   return r;
+}
 static void send_authorization_request(struct mg_connection *conn) {
   conn->request_info.status_code = 401;
   (void) mg_printf(conn,
       "HTTP/1.1 401 Unauthorized\r\n"
       "Content-Length: 0\r\n"
       "WWW-Authenticate: Digest qop=\"auth\", "
       "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
       conn->ctx->config[AUTHENTICATION_DOMAIN],
       (unsigned long) time(NULL));
 #ifndef MG_DISABLE_FILESYSTEM
 int mg_stat(const char *path, cs_stat_t *st) {
 #ifdef _WIN32
   wchar_t wpath[MAX_PATH_SIZE];
   to_wchar(path, wpath, ARRAY_SIZE(wpath));
   DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st)));
   return _wstati64(wpath, (struct _stati64 *) st);
 #else
   return stat(path, st);
 #endif
+}
 static int is_authorized_for_put(struct mg_connection *conn) {
   FILE *fp;
   int ret = 0;
 FILE *mg_fopen(const char *path, const char *mode) {
 #ifdef _WIN32
   wchar_t wpath[MAX_PATH_SIZE], wmode[10];
   to_wchar(path, wpath, ARRAY_SIZE(wpath));
   to_wchar(mode, wmode, ARRAY_SIZE(wmode));
   return _wfopen(wpath, wmode);
 #else
   return fopen(path, mode);
 #endif
+}
   fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
     mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
 int mg_open(const char *path, int flag, int mode) { /* LCOV_EXCL_LINE */
 #ifdef _WIN32
   wchar_t wpath[MAX_PATH_SIZE];
   to_wchar(path, wpath, ARRAY_SIZE(wpath));
   return _wopen(wpath, flag, mode);
 #else
   return open(path, flag, mode); /* LCOV_EXCL_LINE */
 #endif
+}
 #endif
   if (fp != NULL) {
     ret = authorize(conn, fp);
     (void) fclose(fp);
 void mg_base64_encode(const unsigned char *src, int src_len, char *dst) {
   cs_base64_encode(src, src_len, dst);
+}
   return ret;
 int mg_base64_decode(const unsigned char *s, int len, char *dst) {
   return cs_base64_decode(s, len, dst);
+}
 int mg_modify_passwords_file(const char *fname, const char *domain,
                              const char *user, const char *pass) {
   int found;
   char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
   FILE *fp, *fp2;
 #ifdef MG_ENABLE_THREADS
 void *mg_start_thread(void *(*f)(void *), void *p) {
 #ifdef _WIN32
   return (void *) _beginthread((void(__cdecl *) (void *) ) f, 0, p);
 #else
   pthread_t thread_id = (pthread_t) 0;
   pthread_attr_t attr;
   found = 0;
   fp = fp2 = NULL;
   (void) pthread_attr_init(&attr);
   (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
   // Regard empty password as no password - remove user record.
   if (pass != NULL && pass[0] == '\0') {
     pass = NULL;
+  }
 #if defined(MG_STACK_SIZE) && MG_STACK_SIZE > 1
   (void) pthread_attr_setstacksize(&attr, MG_STACK_SIZE);
 #endif
   (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
   pthread_create(&thread_id, &attr, f, p);
   pthread_attr_destroy(&attr);
   // Create the file if does not exist
   if ((fp = mg_fopen(fname, "a+")) != NULL) {
     (void) fclose(fp);
   return (void *) thread_id;
 #endif
+}
 #endif /* MG_ENABLE_THREADS */
   // Open the given file and temporary file
   if ((fp = mg_fopen(fname, "r")) == NULL) {
     return 0;
   } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
     fclose(fp);
     return 0;
 /* Set close-on-exec bit for a given socket. */
 void mg_set_close_on_exec(sock_t sock) {
 #ifdef _WIN32
   (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0);
 #else
   fcntl(sock, F_SETFD, FD_CLOEXEC);
 #endif
+}
   // Copy the stuff to temporary file
   while (fgets(line, sizeof(line), fp) != NULL) {
     if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
       continue;
 void mg_sock_addr_to_str(const union socket_address *sa, char *buf, size_t len,
                          int flags) {
   int is_v6;
   if (buf == NULL || len <= 0) return;
   buf[0] = '\0';
 #if defined(MG_ENABLE_IPV6)
   is_v6 = sa->sa.sa_family == AF_INET6;
 #else
   is_v6 = 0;
 #endif
   if (flags & MG_SOCK_STRINGIFY_IP) {
 #if defined(MG_ENABLE_IPV6)
     const void *addr = NULL;
     char *start = buf;
     socklen_t capacity = len;
     if (!is_v6) {
       addr = &sa->sin.sin_addr;
     } else {
       addr = (void *) &sa->sin6.sin6_addr;
       if (flags & MG_SOCK_STRINGIFY_PORT) {
         *buf = '[';
         start++;
         capacity--;
+      }
     if (!strcmp(u, user) && !strcmp(d, domain)) {
       found++;
       if (pass != NULL) {
         mg_md5(ha1, user, ":", domain, ":", pass, NULL);
         fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+    }
     if (inet_ntop(sa->sa.sa_family, addr, start, capacity) == NULL) {
       *buf = '\0';
+    }
 #elif defined(_WIN32) || defined(MG_ESP8266)
     /* Only Windoze Vista (and newer) have inet_ntop() */
     strncpy(buf, inet_ntoa(sa->sin.sin_addr), len);
 #else
     inet_ntop(AF_INET, (void *) &sa->sin.sin_addr, buf, len);
 #endif
+  }
   if (flags & MG_SOCK_STRINGIFY_PORT) {
     int port = ntohs(sa->sin.sin_port);
     if (flags & MG_SOCK_STRINGIFY_IP) {
       snprintf(buf + strlen(buf), len - (strlen(buf) + 1), "%s:%d",
                (is_v6 ? "]" : ""), port);
     } else {
-      (void) fprintf(fp2, "%s", line);
+      snprintf(buf, len, "%d", port);
+    }
+  }
   // If new user, just add it
   if (!found && pass != NULL) {
     mg_md5(ha1, user, ":", domain, ":", pass, NULL);
     (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+}
   // Close files
   (void) fclose(fp);
   (void) fclose(fp2);
 void mg_conn_addr_to_str(struct mg_connection *nc, char *buf, size_t len,
                          int flags) {
   union socket_address sa;
   memset(&sa, 0, sizeof(sa));
   mg_if_get_conn_addr(nc, flags & MG_SOCK_STRINGIFY_REMOTE, &sa);
   mg_sock_addr_to_str(&sa, buf, len, flags);
+}
   // Put the temp file in place of real file
   (void) mg_remove(fname);
   (void) mg_rename(tmp, fname);
 #ifndef MG_DISABLE_HEXDUMP
 int mg_hexdump(const void *buf, int len, char *dst, int dst_len) {
   const unsigned char *p = (const unsigned char *) buf;
   char ascii[17] = "";
   int i, idx, n = 0;
   return 1;
   for (i = 0; i < len; i++) {
     idx = i % 16;
     if (idx == 0) {
       if (i > 0) n += snprintf(dst + n, dst_len - n, "  %s\n", ascii);
       n += snprintf(dst + n, dst_len - n, "%04x ", i);
+    }
     n += snprintf(dst + n, dst_len - n, " %02x", p[i]);
     ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i];
     ascii[idx + 1] = '\0';
+  }
 struct de {
   struct mg_connection *conn;
   char *file_name;
   struct mgstat st;
 };
   while (i++ % 16) n += snprintf(dst + n, dst_len - n, "%s", "   ");
   n += snprintf(dst + n, dst_len - n, "  %s\n\n", ascii);
 static void url_encode(const char *src, char *dst, size_t dst_len) {
   static const char *dont_escape = "._-$,;~()";
   static const char *hex = "0123456789abcdef";
   const char *end = dst + dst_len - 1;
   return n;
+}
 #endif
 int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap) {
   va_list ap_copy;
   int len;
   for (; *src != '\0' && dst < end; src++, dst++) {
     if (isalnum(*(const unsigned char *) src) ||
         strchr(dont_escape, * (const unsigned char *) src) != NULL) {
       *dst = *src;
     } else if (dst + 2 < end) {
       dst[0] = '%';
       dst[1] = hex[(* (const unsigned char *) src) >> 4];
       dst[2] = hex[(* (const unsigned char *) src) & 0xf];
       dst += 2;
   va_copy(ap_copy, ap);
   len = vsnprintf(*buf, size, fmt, ap_copy);
   va_end(ap_copy);
   if (len < 0) {
     /* eCos and Windows are not standard-compliant and return -1 when
      * the buffer is too small. Keep allocating larger buffers until we
      * succeed or out of memory. */
     *buf = NULL; /* LCOV_EXCL_START */
     while (len < 0) {
       MG_FREE(*buf);
       size *= 2;
       if ((*buf = (char *) MG_MALLOC(size)) == NULL) break;
       va_copy(ap_copy, ap);
       len = vsnprintf(*buf, size, fmt, ap_copy);
       va_end(ap_copy);
+    }
     /* LCOV_EXCL_STOP */
   } else if (len >= (int) size) {
     /* Standard-compliant code path. Allocate a buffer that is large enough. */
     if ((*buf = (char *) MG_MALLOC(len + 1)) == NULL) {
       len = -1; /* LCOV_EXCL_LINE */
     } else {    /* LCOV_EXCL_LINE */
       va_copy(ap_copy, ap);
       len = vsnprintf(*buf, len + 1, fmt, ap_copy);
       va_end(ap_copy);
+    }
+  }
-  *dst = '\0';
+  return len;
+}
 static void print_dir_entry(struct de *de) {
   char size[64], mod[64], href[PATH_MAX];
   if (de->st.is_directory) {
     (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
   } else {
      // We use (signed) cast below because MSVC 6 compiler cannot
      // convert unsigned __int64 to double. Sigh.
     if (de->st.size < 1024) {
       (void) mg_snprintf(de->conn, size, sizeof(size),
           "%lu", (unsigned long) de->st.size);
     } else if (de->st.size < 1024 * 1024) {
       (void) mg_snprintf(de->conn, size, sizeof(size),
           "%.1fk", (double) de->st.size / 1024.0);
     } else if (de->st.size < 1024 * 1024 * 1024) {
       (void) mg_snprintf(de->conn, size, sizeof(size),
           "%.1fM", (double) de->st.size / 1048576);
 #if !defined(NO_LIBC) && !defined(MG_DISABLE_HEXDUMP)
 void mg_hexdump_connection(struct mg_connection *nc, const char *path,
                            const void *buf, int num_bytes, int ev) {
   FILE *fp = NULL;
   char *hexbuf, src[60], dst[60];
   int buf_size = num_bytes * 5 + 100;
   if (strcmp(path, "-") == 0) {
     fp = stdout;
   } else if (strcmp(path, "--") == 0) {
     fp = stderr;
 #ifndef MG_DISABLE_FILESYSTEM
   } else {
       (void) mg_snprintf(de->conn, size, sizeof(size),
           "%.1fG", (double) de->st.size / 1073741824);
+    }
     fp = fopen(path, "a");
 #endif
+  }
   (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
   url_encode(de->file_name, href, sizeof(href));
   de->conn->num_bytes_sent += mg_printf(de->conn,
       "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
       "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
       de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
       de->file_name, de->st.is_directory ? "/" : "", mod, size);
   if (fp == NULL) return;
   mg_conn_addr_to_str(nc, src, sizeof(src),
                       MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
   mg_conn_addr_to_str(nc, dst, sizeof(dst), MG_SOCK_STRINGIFY_IP |
                                                 MG_SOCK_STRINGIFY_PORT |
                                                 MG_SOCK_STRINGIFY_REMOTE);
   fprintf(
       fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL), nc, src,
       ev == MG_EV_RECV ? "<-" : ev == MG_EV_SEND
                                     ? "->"
                                     : ev == MG_EV_ACCEPT
                                           ? "<A"
                                           : ev == MG_EV_CONNECT ? "C>" : "XX",
       dst, num_bytes);
   if (num_bytes > 0 && (hexbuf = (char *) MG_MALLOC(buf_size)) != NULL) {
     mg_hexdump(buf, num_bytes, hexbuf, buf_size);
     fprintf(fp, "%s", hexbuf);
     MG_FREE(hexbuf);
+  }
   if (fp != stdin && fp != stdout) fclose(fp);
+}
 #endif
 // This function is called from send_directory() and used for
 // sorting directory entries by size, or name, or modification time.
 // On windows, __cdecl specification is needed in case if project is built
 // with __stdcall convention. qsort always requires __cdels callback.
 static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
   const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
   const char *query_string = a->conn->request_info.query_string;
   int cmp_result = 0;
   if (query_string == NULL) {
     query_string = "na";
 int mg_is_big_endian(void) {
   static const int n = 1;
   /* TODO(mkm) use compiletime check with 4-byte char literal */
   return ((char *) &n)[0] == 0;
+}
   if (a->st.is_directory && !b->st.is_directory) {
     return -1;  // Always put directories on top
   } else if (!a->st.is_directory && b->st.is_directory) {
     return 1;   // Always put directories on top
   } else if (*query_string == 'n') {
     cmp_result = strcmp(a->file_name, b->file_name);
   } else if (*query_string == 's') {
     cmp_result = a->st.size == b->st.size ? 0 :
       a->st.size > b->st.size ? 1 : -1;
   } else if (*query_string == 'd') {
     cmp_result = a->st.mtime == b->st.mtime ? 0 :
       a->st.mtime > b->st.mtime ? 1 : -1;
 const char *mg_next_comma_list_entry(const char *list, struct mg_str *val,
                                      struct mg_str *eq_val) {
   if (list == NULL || *list == '\0') {
     /* End of the list */
     list = NULL;
   } else {
     val->p = list;
     if ((list = strchr(val->p, ',')) != NULL) {
       /* Comma found. Store length and shift the list ptr */
       val->len = list - val->p;
       list++;
     } else {
       /* This value is the last one */
       list = val->p + strlen(val->p);
       val->len = list - val->p;
+    }
   return query_string[1] == 'd' ? -cmp_result : cmp_result;
     if (eq_val != NULL) {
       /* Value has form "x=y", adjust pointers and lengths */
       /* so that val points to "x", and eq_val points to "y". */
       eq_val->len = 0;
       eq_val->p = (const char *) memchr(val->p, '=', val->len);
       if (eq_val->p != NULL) {
         eq_val->p++; /* Skip over '=' character */
         eq_val->len = val->p + val->len - eq_val->p;
         val->len = (eq_val->p - val->p) - 1;
+      }
+    }
+  }
 static int must_hide_file(struct mg_connection *conn, const char *path) {
   const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
   const char *pattern = conn->ctx->config[HIDE_FILES];
   return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 ||
     (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0);
   return list;
+}
 static int scan_directory(struct mg_connection *conn, const char *dir,
                           void *data, void (*cb)(struct de *, void *)) {
   char path[PATH_MAX];
   struct dirent *dp;
   DIR *dirp;
   struct de de;
 int mg_match_prefix(const char *pattern, int pattern_len, const char *str) {
   const char *or_str;
   int len, res, i = 0, j = 0;
   if ((dirp = opendir(dir)) == NULL) {
     return 0;
   } else {
     de.conn = conn;
   if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
     res = mg_match_prefix(pattern, or_str - pattern, str);
     return res > 0 ? res : mg_match_prefix(
                                or_str + 1,
                                (pattern + pattern_len) - (or_str + 1), str);
+  }
     while ((dp = readdir(dirp)) != NULL) {
       // Do not show current dir and hidden files
       if (!strcmp(dp->d_name, ".") ||
           !strcmp(dp->d_name, "..") ||
           must_hide_file(conn, dp->d_name)) {
   for (; i < pattern_len; i++, j++) {
     if (pattern[i] == '?' && str[j] != '\0') {
       continue;
     } else if (pattern[i] == '$') {
       return str[j] == '\0' ? j : -1;
     } else if (pattern[i] == '*') {
       i++;
       if (pattern[i] == '*') {
         i++;
         len = (int) strlen(str + j);
       } else {
         len = (int) strcspn(str + j, "/");
+      }
       mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
       // If we don't memset stat structure to zero, mtime will have
       // garbage and strftime() will segfault later on in
       // print_dir_entry(). memset is required only if mg_stat()
       // fails. For more details, see
       // http://code.google.com/p/mongoose/issues/detail?id=79
       if (mg_stat(path, &de.st) != 0) {
         memset(&de.st, 0, sizeof(de.st));
       if (i == pattern_len) {
         return j + len;
+      }
       de.file_name = dp->d_name;
       cb(&de, data);
       do {
         res = mg_match_prefix(pattern + i, pattern_len - i, str + j + len);
       } while (res == -1 && len-- > 0);
       return res == -1 ? -1 : j + res + len;
     } else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
       return -1;
+    }
     (void) closedir(dirp);
+  }
-  return 1;
+  return j;
+}
 #ifdef NS_MODULE_LINES
 #line 1 "src/json-rpc.c"
 /**/
 #endif
 /* Copyright (c) 2014 Cesanta Software Limited */
 /* All rights reserved */
 struct dir_scan_data {
   struct de *entries;
   int num_entries;
   int arr_size;
 };
 #ifndef MG_DISABLE_JSON_RPC
 static void dir_scan_callback(struct de *de, void *data) {
   struct dir_scan_data *dsd = (struct dir_scan_data *) data;
 /* Amalgamated: #include "internal.h" */
   if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
     dsd->arr_size *= 2;
     dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
                                          sizeof(dsd->entries[0]));
+  }
   if (dsd->entries == NULL) {
     // TODO(lsm): propagate an error to the caller
     dsd->num_entries = 0;
 int mg_rpc_create_reply(char *buf, int len, const struct mg_rpc_request *req,
                         const char *result_fmt, ...) {
   static const struct json_token null_tok = {"null", 4, 0, JSON_TYPE_NULL};
   const struct json_token *id = req->id == NULL ? &null_tok : req->id;
   va_list ap;
   int n = 0;
   n += json_emit(buf + n, len - n, "{s:s,s:", "jsonrpc", "2.0", "id");
   if (id->type == JSON_TYPE_STRING) {
     n += json_emit_quoted_str(buf + n, len - n, id->ptr, id->len);
   } else {
     dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
     dsd->entries[dsd->num_entries].st = de->st;
     dsd->entries[dsd->num_entries].conn = de->conn;
     dsd->num_entries++;
     n += json_emit_unquoted_str(buf + n, len - n, id->ptr, id->len);
+  }
+}
 static void handle_directory_request(struct mg_connection *conn,
                                      const char *dir) {
   int i, sort_direction;
   struct dir_scan_data data = { NULL, 0, 128 };
   n += json_emit(buf + n, len - n, ",s:", "result");
   if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
     send_http_error(conn, 500, "Cannot open directory",
                     "Error: opendir(%s): %s", dir, strerror(ERRNO));
     return;
+  }
   va_start(ap, result_fmt);
   n += json_emit_va(buf + n, len - n, result_fmt, ap);
   va_end(ap);
   sort_direction = conn->request_info.query_string != NULL &&
     conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
   n += json_emit(buf + n, len - n, "}");
   conn->must_close = 1;
   mg_printf(conn, "%s",
             "HTTP/1.1 200 OK\r\n"
             "Connection: close\r\n"
             "Content-Type: text/html; charset=utf-8\r\n\r\n");
   conn->num_bytes_sent += mg_printf(conn,
       "<html><head><title>Index of %s</title>"
       "<style>th {text-align: left;}</style></head>"
       "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
       "<tr><th><a href=\"?n%c\">Name</a></th>"
       "<th><a href=\"?d%c\">Modified</a></th>"
       "<th><a href=\"?s%c\">Size</a></th></tr>"
       "<tr><td colspan=\"3\"><hr></td></tr>",
       conn->request_info.uri, conn->request_info.uri,
       sort_direction, sort_direction, sort_direction);
   // Print first entry - link to a parent directory
   conn->num_bytes_sent += mg_printf(conn,
       "<tr><td><a href=\"%s%s\">%s</a></td>"
       "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
       conn->request_info.uri, "..", "Parent directory", "-", "-");
   // Sort and print directory entries
   qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
         compare_dir_entries);
   for (i = 0; i < data.num_entries; i++) {
     print_dir_entry(&data.entries[i]);
     free(data.entries[i].file_name);
+  }
   free(data.entries);
   conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
   conn->request_info.status_code = 200;
+}
 // Send len bytes from the opened file to the client.
 static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
   char buf[MG_BUF_LEN];
   int to_read, num_read, num_written;
   while (len > 0) {
     // Calculate how much to read from the file in the buffer
     to_read = sizeof(buf);
     if ((int64_t) to_read > len) {
       to_read = (int) len;
+    }
     // Read from file, exit the loop on error
     if ((num_read = fread(buf, 1, (size_t)to_read, fp)) <= 0) {
       break;
   return n;
+}
     // Send read bytes to the client, exit the loop on error
     if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read) {
       break;
+    }
 int mg_rpc_create_request(char *buf, int len, const char *method,
                           const char *id, const char *params_fmt, ...) {
   va_list ap;
   int n = 0;
     // Both read and were successful, adjust counters
     conn->num_bytes_sent += num_written;
     len -= num_written;
+  }
+}
   n += json_emit(buf + n, len - n, "{s:s,s:s,s:s,s:", "jsonrpc", "2.0", "id",
                  id, "method", method, "params");
   va_start(ap, params_fmt);
   n += json_emit_va(buf + n, len - n, params_fmt, ap);
   va_end(ap);
 static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
   return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
+}
   n += json_emit(buf + n, len - n, "}");
 static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
   strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
   return n;
+}
 static void construct_etag(char *buf, size_t buf_len,
                            const struct mgstat *stp) {
   snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"",
            (unsigned long) stp->mtime, stp->size);
+}
 int mg_rpc_create_error(char *buf, int len, struct mg_rpc_request *req,
                         int code, const char *message, const char *fmt, ...) {
   va_list ap;
   int n = 0;
 static void handle_file_request(struct mg_connection *conn, const char *path,
                                 struct mgstat *stp) {
   char date[64], lm[64], etag[64], range[64];
   const char *msg = "OK", *hdr;
   time_t curtime = time(NULL);
   int64_t cl, r1, r2;
   struct vec mime_vec;
   FILE *fp;
   int n;
   n += json_emit(buf + n, len - n, "{s:s,s:V,s:{s:i,s:s,s:", "jsonrpc", "2.0",
                  "id", req->id == NULL ? "null" : req->id->ptr,
                  req->id == NULL ? 4 : req->id->len, "error", "code", code,
                  "message", message, "data");
   va_start(ap, fmt);
   n += json_emit_va(buf + n, len - n, fmt, ap);
   va_end(ap);
   get_mime_type(conn->ctx, path, &mime_vec);
   cl = stp->size;
   conn->request_info.status_code = 200;
   range[0] = '\0';
   n += json_emit(buf + n, len - n, "}}");
   if ((fp = mg_fopen(path, "rb")) == NULL) {
     send_http_error(conn, 500, http_500_error,
         "fopen(%s): %s", path, strerror(ERRNO));
     return;
   return n;
+}
   set_close_on_exec(fileno(fp));
   // If Range: header specified, act accordingly
   r1 = r2 = 0;
   hdr = mg_get_header(conn, "Range");
   if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
     conn->request_info.status_code = 206;
     (void) fseeko(fp, r1, SEEK_SET);
     cl = n == 2 ? r2 - r1 + 1: cl - r1;
     (void) mg_snprintf(conn, range, sizeof(range),
         "Content-Range: bytes "
         "%" INT64_FMT "-%"
         INT64_FMT "/%" INT64_FMT "\r\n",
         r1, r1 + cl - 1, stp->size);
     msg = "Partial Content";
+  }
   // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
   // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
   gmt_time_string(date, sizeof(date), &curtime);
   gmt_time_string(lm, sizeof(lm), &stp->mtime);
   construct_etag(etag, sizeof(etag), stp);
   (void) mg_printf(conn,
       "HTTP/1.1 %d %s\r\n"
       "Date: %s\r\n"
       "Last-Modified: %s\r\n"
       "Etag: %s\r\n"
       "Content-Type: %.*s\r\n"
       "Content-Length: %" INT64_FMT "\r\n"
       "Connection: %s\r\n"
       "Accept-Ranges: bytes\r\n"
       "%s\r\n",
       conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len,
       mime_vec.ptr, cl, suggest_connection_header(conn), range);
   if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
     send_file_data(conn, fp, cl);
+  }
   (void) fclose(fp);
 int mg_rpc_create_std_error(char *buf, int len, struct mg_rpc_request *req,
                             int code) {
   const char *message = NULL;
   switch (code) {
     case JSON_RPC_PARSE_ERROR:
       message = "parse error";
       break;
     case JSON_RPC_INVALID_REQUEST_ERROR:
       message = "invalid request";
       break;
     case JSON_RPC_METHOD_NOT_FOUND_ERROR:
       message = "method not found";
       break;
     case JSON_RPC_INVALID_PARAMS_ERROR:
       message = "invalid parameters";
       break;
     case JSON_RPC_SERVER_ERROR:
       message = "server error";
       break;
     default:
       message = "unspecified error";
       break;
+  }
 void mg_send_file(struct mg_connection *conn, const char *path) {
   struct mgstat st;
   if (mg_stat(path, &st) == 0) {
     handle_file_request(conn, path, &st);
   } else {
     send_http_error(conn, 404, "Not Found", "%s", "File not found");
   return mg_rpc_create_error(buf, len, req, code, message, "N");
+}
 int mg_rpc_dispatch(const char *buf, int len, char *dst, int dst_len,
                     const char **methods, mg_rpc_handler_t *handlers) {
   struct json_token tokens[200];
   struct mg_rpc_request req;
   int i, n;
   memset(&req, 0, sizeof(req));
   n = parse_json(buf, len, tokens, sizeof(tokens) / sizeof(tokens[0]));
   if (n <= 0) {
     int err_code = (n == JSON_STRING_INVALID) ? JSON_RPC_PARSE_ERROR
                                               : JSON_RPC_SERVER_ERROR;
     return mg_rpc_create_std_error(dst, dst_len, &req, err_code);
+  }
   req.message = tokens;
   req.id = find_json_token(tokens, "id");
   req.method = find_json_token(tokens, "method");
   req.params = find_json_token(tokens, "params");
 // Parse HTTP headers from the given buffer, advance buffer to the point
 // where parsing stopped.
 static void parse_http_headers(char **buf, struct mg_request_info *ri) {
   int i;
   if (req.id == NULL || req.method == NULL) {
     return mg_rpc_create_std_error(dst, dst_len, &req,
                                    JSON_RPC_INVALID_REQUEST_ERROR);
+  }
   for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
     ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
     ri->http_headers[i].value = skip(buf, "\r\n");
     if (ri->http_headers[i].name[0] == '\0')
   for (i = 0; methods[i] != NULL; i++) {
     int mlen = strlen(methods[i]);
     if (mlen == req.method->len &&
         memcmp(methods[i], req.method->ptr, mlen) == 0)
       break;
     ri->num_headers = i + 1;
+  }
+  }
 static int is_valid_http_method(const char *method) {
   return !strcmp(method, "GET") || !strcmp(method, "POST") ||
     !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
     !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
     !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
   if (methods[i] == NULL) {
     return mg_rpc_create_std_error(dst, dst_len, &req,
                                    JSON_RPC_METHOD_NOT_FOUND_ERROR);
+  }
 // Parse HTTP request, fill in mg_request_info structure.
 // This function modifies the buffer by NUL-terminating
 // HTTP request components, header names and header values.
 static int parse_http_message(char *buf, int len, struct mg_request_info *ri) {
   int request_length = get_request_len(buf, len);
   if (request_length > 0) {
     // Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
     ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
     ri->num_headers = 0;
     ri->status_code = -1;
   return handlers[i](dst, dst_len, &req);
+}
     buf[request_length - 1] = '\0';
 int mg_rpc_parse_reply(const char *buf, int len, struct json_token *toks,
                        int max_toks, struct mg_rpc_reply *rep,
                        struct mg_rpc_error *er) {
   int n = parse_json(buf, len, toks, max_toks);
     // RFC says that all initial whitespaces should be ingored
     while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
       buf++;
+    }
     ri->request_method = skip(&buf, " ");
     ri->uri = skip(&buf, " ");
     ri->http_version = skip(&buf, "\r\n");
     parse_http_headers(&buf, ri);
+  }
   return request_length;
+}
   memset(rep, 0, sizeof(*rep));
   memset(er, 0, sizeof(*er));
 static int parse_http_request(char *buf, int len, struct mg_request_info *ri) {
   int result = parse_http_message(buf, len, ri);
   if (result > 0 &&
       is_valid_http_method(ri->request_method) &&
       !strncmp(ri->http_version, "HTTP/", 5)) {
     ri->http_version += 5;   // Skip "HTTP/"
   if (n > 0) {
     if ((rep->result = find_json_token(toks, "result")) != NULL) {
       rep->message = toks;
       rep->id = find_json_token(toks, "id");
     } else {
     result = -1;
       er->message = toks;
       er->id = find_json_token(toks, "id");
       er->error_code = find_json_token(toks, "error.code");
       er->error_message = find_json_token(toks, "error.message");
       er->error_data = find_json_token(toks, "error.data");
+    }
   return result;
+  }
 static int parse_http_response(char *buf, int len, struct mg_request_info *ri) {
   int result = parse_http_message(buf, len, ri);
   return result > 0 && !strncmp(ri->request_method, "HTTP/", 5) ? result : -1;
   return n;
+}
 // Keep reading the input (either opened file descriptor fd, or socket sock,
 // or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
 // buffer (which marks the end of HTTP request). Buffer buf may already
 // have some data. The length of the data is stored in nread.
 // Upon every read operation, increase nread by the number of bytes read.
 static int read_request(FILE *fp, struct mg_connection *conn,
                         char *buf, int bufsiz, int *nread) {
   int request_len, n = 1;
 #endif /* MG_DISABLE_JSON_RPC */
 #ifdef NS_MODULE_LINES
 #line 1 "src/mqtt.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
   request_len = get_request_len(buf, *nread);
   while (*nread < bufsiz && request_len == 0 && n > 0) {
     n = pull(fp, conn, buf + *nread, bufsiz - *nread);
     if (n > 0) {
       *nread += n;
       request_len = get_request_len(buf, *nread);
+    }
+  }
 #ifndef MG_DISABLE_MQTT
   if (n < 0) {
     // recv() error -> propagate error; do not process a b0rked-with-very-high-probability request
     return -1;
+  }
   return request_len;
+}
 /* Amalgamated: #include "internal.h" */
 // For given directory path, substitute it to valid index file.
 // Return 0 if index file has been found, -1 if not found.
 // If the file is found, it's stats is returned in stp.
 static int substitute_index_file(struct mg_connection *conn, char *path,
                                  size_t path_len, struct mgstat *stp) {
   const char *list = conn->ctx->config[INDEX_FILES];
   struct mgstat st;
   struct vec filename_vec;
   size_t n = strlen(path);
   int found = 0;
 static int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm) {
   uint8_t header;
   int cmd;
   size_t len = 0;
   int var_len = 0;
   char *vlen = &io->buf[1];
   // The 'path' given to us points to the directory. Remove all trailing
   // directory separator characters from the end of the path, and
   // then append single directory separator character.
   while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
     n--;
+  }
   path[n] = DIRSEP;
   if (io->len < 2) return -1;
   // Traverse index files list. For each entry, append it to the given
   // path and see if the file exists. If it exists, break the loop
   while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
   header = io->buf[0];
   cmd = header >> 4;
     // Ignore too long entries that may overflow path buffer
     if (filename_vec.len > path_len - (n + 2))
       continue;
   /* decode mqtt variable length */
   do {
     len += (*vlen & 127) << 7 * (vlen - &io->buf[1]);
   } while ((*vlen++ & 128) != 0 && ((size_t)(vlen - io->buf) <= io->len));
     // Prepare full path to the index file
     (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
   if (io->len < (size_t)(len - 1)) return -1;
     // Does it exist?
     if (mg_stat(path, &st) == 0) {
       // Yes it does, break the loop
       *stp = st;
       found = 1;
   mbuf_remove(io, 1 + (vlen - &io->buf[1]));
   mm->cmd = cmd;
   mm->qos = MG_MQTT_GET_QOS(header);
   switch (cmd) {
     case MG_MQTT_CMD_CONNECT:
       /* TODO(mkm): parse keepalive and will */
       break;
     case MG_MQTT_CMD_CONNACK:
       mm->connack_ret_code = io->buf[1];
       var_len = 2;
       break;
     case MG_MQTT_CMD_PUBACK:
     case MG_MQTT_CMD_PUBREC:
     case MG_MQTT_CMD_PUBREL:
     case MG_MQTT_CMD_PUBCOMP:
     case MG_MQTT_CMD_SUBACK:
       mm->message_id = ntohs(*(uint16_t *) io->buf);
       var_len = 2;
       break;
     case MG_MQTT_CMD_PUBLISH: {
       uint16_t topic_len = ntohs(*(uint16_t *) io->buf);
       mm->topic = (char *) MG_MALLOC(topic_len + 1);
       mm->topic[topic_len] = 0;
       strncpy(mm->topic, io->buf + 2, topic_len);
       var_len = topic_len + 2;
       if (MG_MQTT_GET_QOS(header) > 0) {
         mm->message_id = ntohs(*(uint16_t *) io->buf);
         var_len += 2;
+      }
     } break;
     case MG_MQTT_CMD_SUBSCRIBE:
       /*
        * topic expressions are left in the payload and can be parsed with
        * `mg_mqtt_next_subscribe_topic`
        */
       mm->message_id = ntohs(*(uint16_t *) io->buf);
       var_len = 2;
       break;
     default:
       printf("TODO: UNHANDLED COMMAND %d\n", cmd);
       break;
+    }
+  }
   // If no index file exists, restore directory path
   if (!found) {
     path[n] = '\0';
   mbuf_remove(io, var_len);
   return len - var_len;
+}
   return found;
+}
 static void mqtt_handler(struct mg_connection *nc, int ev, void *ev_data) {
   int len;
   struct mbuf *io = &nc->recv_mbuf;
   struct mg_mqtt_message mm;
   memset(&mm, 0, sizeof(mm));
 // Return True if we should reply 304 Not Modified.
 static int is_not_modified(const struct mg_connection *conn,
                            const struct mgstat *stp) {
   char etag[64];
   const char *ims = mg_get_header(conn, "If-Modified-Since");
   const char *inm = mg_get_header(conn, "If-None-Match");
   construct_etag(etag, sizeof(etag), stp);
   return (inm != NULL && !mg_strcasecmp(etag, inm)) ||
     (ims != NULL && stp->mtime <= parse_date_string(ims));
+}
 static int forward_body_data(struct mg_connection *conn, FILE *fp,
                              SOCKET sock, SSL *ssl) {
   const char *expect;
   char buf[MG_BUF_LEN];
   int to_read, nread, buffered_len, success = 0;
   expect = mg_get_header(conn, "Expect");
   assert(fp != NULL);
   if (conn->content_len == -1) {
     send_http_error(conn, 411, "Length Required", "%s", "");
   } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
     send_http_error(conn, 417, "Expectation Failed", "%s", "");
   } else {
     if (expect != NULL) {
       (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
+    }
   nc->handler(nc, ev, ev_data);
     buffered_len = conn->next_request - conn->body;
     assert(buffered_len >= 0);
     assert(conn->consumed_content == 0);
   switch (ev) {
     case MG_EV_RECV:
       len = parse_mqtt(io, &mm);
       if (len == -1) break; /* not fully buffered */
       mm.payload.p = io->buf;
       mm.payload.len = len;
     if (buffered_len > 0) {
       if ((int64_t) buffered_len > conn->content_len) {
         buffered_len = (int) conn->content_len;
+      }
       push(fp, sock, ssl, conn->body, (int64_t) buffered_len);
       conn->consumed_content += buffered_len;
       conn->body += buffered_len;
+    }
       nc->handler(nc, MG_MQTT_EVENT_BASE + mm.cmd, &mm);
     nread = 0;
     while (conn->consumed_content < conn->content_len) {
       to_read = sizeof(buf);
       if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
         to_read = (int) (conn->content_len - conn->consumed_content);
       if (mm.topic) {
         MG_FREE(mm.topic);
+      }
       nread = pull(NULL, conn, buf, to_read);
       if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
       mbuf_remove(io, mm.payload.len);
       break;
+  }
       conn->consumed_content += nread;
+}
     if (conn->consumed_content == conn->content_len) {
       success = nread >= 0;
 void mg_set_protocol_mqtt(struct mg_connection *nc) {
   nc->proto_handler = mqtt_handler;
+}
     // Each error code path in this function must send an error
     if (!success) {
       send_http_error(conn, 577, http_500_error, "%s", "");
+    }
 void mg_send_mqtt_handshake(struct mg_connection *nc, const char *client_id) {
   static struct mg_send_mqtt_handshake_opts opts;
   mg_send_mqtt_handshake_opt(nc, client_id, opts);
+}
   return success;
 void mg_send_mqtt_handshake_opt(struct mg_connection *nc, const char *client_id,
                                 struct mg_send_mqtt_handshake_opts opts) {
   uint8_t header = MG_MQTT_CMD_CONNECT << 4;
   uint8_t rem_len;
   uint16_t keep_alive;
   uint16_t client_id_len;
   /*
    * 9: version_header(len, magic_string, version_number), 1: flags, 2:
    * keep-alive timer,
    * 2: client_identifier_len, n: client_id
    */
   rem_len = 9 + 1 + 2 + 2 + strlen(client_id);
   mg_send(nc, &header, 1);
   mg_send(nc, &rem_len, 1);
   mg_send(nc, "\00\06MQIsdp\03", 9);
   mg_send(nc, &opts.flags, 1);
   if (opts.keep_alive == 0) {
     opts.keep_alive = 60;
+  }
   keep_alive = htons(opts.keep_alive);
   mg_send(nc, &keep_alive, 2);
 #if !defined(NO_CGI)
 // This structure helps to create an environment for the spawned CGI program.
 // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
 // last element must be NULL.
 // However, on Windows there is a requirement that all these VARIABLE=VALUE\0
 // strings must reside in a contiguous buffer. The end of the buffer is
 // marked by two '\0' characters.
 // We satisfy both worlds: we create an envp array (which is vars), all
 // entries are actually pointers inside buf.
 struct cgi_env_block {
   struct mg_connection *conn;
   char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
   int len; // Space taken
   char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
   int nvars; // Number of variables
 };
   client_id_len = htons(strlen(client_id));
   mg_send(nc, &client_id_len, 2);
   mg_send(nc, client_id, strlen(client_id));
+}
 static char *addenv(struct cgi_env_block *block,
                     PRINTF_FORMAT_STRING(const char *fmt), ...)
   PRINTF_ARGS(2, 3);
 static void mg_mqtt_prepend_header(struct mg_connection *nc, uint8_t cmd,
                                    uint8_t flags, size_t len) {
   size_t off = nc->send_mbuf.len - len;
   uint8_t header = cmd << 4 | (uint8_t) flags;
 // Append VARIABLE=VALUE\0 string to the buffer, and add a respective
 // pointer into the vars array.
 static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
   int n, space;
   char *added;
   va_list ap;
   uint8_t buf[1 + sizeof(size_t)];
   uint8_t *vlen = &buf[1];
   // Calculate how much space is left in the buffer
   space = sizeof(block->buf) - block->len - 2;
   assert(space >= 0);
   assert(nc->send_mbuf.len >= len);
   // Make a pointer to the free space int the buffer
   added = block->buf + block->len;
   buf[0] = header;
   // Copy VARIABLE=VALUE\0 string into the free space
   va_start(ap, fmt);
   n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
   va_end(ap);
   /* mqtt variable length encoding */
   do {
     *vlen = len % 0x80;
     len /= 0x80;
     if (len > 0) *vlen |= 0x80;
     vlen++;
   } while (len > 0);
   // Make sure we do not overflow buffer and the envp array
   if (n > 0 && n + 1 < space &&
       block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
     // Append a pointer to the added string into the envp array
     block->vars[block->nvars++] = added;
     // Bump up used length counter. Include \0 terminator
     block->len += n + 1;
   } else {
     cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt);
   mbuf_insert(&nc->send_mbuf, off, buf, vlen - buf);
+}
   return added;
+}
 void mg_mqtt_publish(struct mg_connection *nc, const char *topic,
                      uint16_t message_id, int flags, const void *data,
                      size_t len) {
   size_t old_len = nc->send_mbuf.len;
 static void prepare_cgi_environment(struct mg_connection *conn,
                                     const char *prog,
                                     struct cgi_env_block *blk) {
   const char *s, *slash;
   struct vec var_vec;
   char *p, src_addr[20];
   int  i;
   uint16_t topic_len = htons(strlen(topic));
   uint16_t message_id_net = htons(message_id);
   blk->len = blk->nvars = 0;
   blk->conn = conn;
   sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
   mg_send(nc, &topic_len, 2);
   mg_send(nc, topic, strlen(topic));
   if (MG_MQTT_GET_QOS(flags) > 0) {
     mg_send(nc, &message_id_net, 2);
+  }
   mg_send(nc, data, len);
   addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
   addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
   addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PUBLISH, flags,
                          nc->send_mbuf.len - old_len);
+}
   // Prepare the environment block
   addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
   addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
   addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
 void mg_mqtt_subscribe(struct mg_connection *nc,
                        const struct mg_mqtt_topic_expression *topics,
                        size_t topics_len, uint16_t message_id) {
   size_t old_len = nc->send_mbuf.len;
   // TODO(lsm): fix this for IPv6 case
   addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
   uint16_t message_id_n = htons(message_id);
   size_t i;
   addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
   addenv(blk, "REMOTE_ADDR=%s", src_addr);
   addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
   addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
   mg_send(nc, (char *) &message_id_n, 2);
   for (i = 0; i < topics_len; i++) {
     uint16_t topic_len_n = htons(strlen(topics[i].topic));
     mg_send(nc, &topic_len_n, 2);
     mg_send(nc, topics[i].topic, strlen(topics[i].topic));
     mg_send(nc, &topics[i].qos, 1);
+  }
   // SCRIPT_NAME
   assert(conn->request_info.uri[0] == '/');
   slash = strrchr(conn->request_info.uri, '/');
   if ((s = strrchr(prog, '/')) == NULL)
     s = prog;
   addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - conn->request_info.uri),
          conn->request_info.uri, s);
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBSCRIBE, MG_MQTT_QOS(1),
                          nc->send_mbuf.len - old_len);
+}
   addenv(blk, "SCRIPT_FILENAME=%s", prog);
   addenv(blk, "PATH_TRANSLATED=%s", prog);
   addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
 int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *msg,
                                  struct mg_str *topic, uint8_t *qos, int pos) {
   unsigned char *buf = (unsigned char *) msg->payload.p + pos;
   if ((size_t) pos >= msg->payload.len) {
     return -1;
+  }
   if ((s = mg_get_header(conn, "Content-Type")) != NULL)
     addenv(blk, "CONTENT_TYPE=%s", s);
   topic->len = buf[0] << 8 | buf[1];
   topic->p = (char *) buf + 2;
   *qos = buf[2 + topic->len];
   return pos + 2 + topic->len + 1;
+}
   if (conn->request_info.query_string != NULL)
     addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
 void mg_mqtt_unsubscribe(struct mg_connection *nc, char **topics,
                          size_t topics_len, uint16_t message_id) {
   size_t old_len = nc->send_mbuf.len;
   if ((s = mg_get_header(conn, "Content-Length")) != NULL)
     addenv(blk, "CONTENT_LENGTH=%s", s);
   uint16_t message_id_n = htons(message_id);
   size_t i;
   if ((s = getenv("PATH")) != NULL)
     addenv(blk, "PATH=%s", s);
   mg_send(nc, (char *) &message_id_n, 2);
   for (i = 0; i < topics_len; i++) {
     uint16_t topic_len_n = htons(strlen(topics[i]));
     mg_send(nc, &topic_len_n, 2);
     mg_send(nc, topics[i], strlen(topics[i]));
+  }
   if (conn->path_info != NULL) {
     addenv(blk, "PATH_INFO=%s", conn->path_info);
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_UNSUBSCRIBE, MG_MQTT_QOS(1),
                          nc->send_mbuf.len - old_len);
+}
 #if defined(_WIN32)
   if ((s = getenv("COMSPEC")) != NULL) {
     addenv(blk, "COMSPEC=%s", s);
 void mg_mqtt_connack(struct mg_connection *nc, uint8_t return_code) {
   uint8_t unused = 0;
   mg_send(nc, &unused, 1);
   mg_send(nc, &return_code, 1);
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_CONNACK, 0, 2);
+}
   if ((s = getenv("SYSTEMROOT")) != NULL) {
     addenv(blk, "SYSTEMROOT=%s", s);
 /*
  * Sends a command which contains only a `message_id` and a QoS level of 1.
+ *
  * Helper function.
  */
 static void mg_send_mqtt_short_command(struct mg_connection *nc, uint8_t cmd,
                                        uint16_t message_id) {
   uint16_t message_id_net = htons(message_id);
   mg_send(nc, &message_id_net, 2);
   mg_mqtt_prepend_header(nc, cmd, MG_MQTT_QOS(1), 2);
+}
   if ((s = getenv("SystemDrive")) != NULL) {
     addenv(blk, "SystemDrive=%s", s);
 void mg_mqtt_puback(struct mg_connection *nc, uint16_t message_id) {
   mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBACK, message_id);
+}
 #else
   if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
     addenv(blk, "LD_LIBRARY_PATH=%s", s);
 #endif // _WIN32
   if ((s = getenv("PERLLIB")) != NULL)
     addenv(blk, "PERLLIB=%s", s);
 void mg_mqtt_pubrec(struct mg_connection *nc, uint16_t message_id) {
   mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREC, message_id);
+}
   if (conn->request_info.remote_user != NULL) {
     addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
     addenv(blk, "%s", "AUTH_TYPE=Digest");
 void mg_mqtt_pubrel(struct mg_connection *nc, uint16_t message_id) {
   mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREL, message_id);
+}
   // Add all headers as HTTP_* variables
   for (i = 0; i < conn->request_info.num_headers; i++) {
     p = addenv(blk, "HTTP_%s=%s",
         conn->request_info.http_headers[i].name,
         conn->request_info.http_headers[i].value);
 void mg_mqtt_pubcomp(struct mg_connection *nc, uint16_t message_id) {
   mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBCOMP, message_id);
+}
     // Convert variable name into uppercase, and change - to _
     for (; *p != '=' && *p != '\0'; p++) {
       if (*p == '-')
         *p = '_';
       *p = (char) toupper(* (unsigned char *) p);
 void mg_mqtt_suback(struct mg_connection *nc, uint8_t *qoss, size_t qoss_len,
                     uint16_t message_id) {
   size_t i;
   uint16_t message_id_net = htons(message_id);
   mg_send(nc, &message_id_net, 2);
   for (i = 0; i < qoss_len; i++) {
     mg_send(nc, &qoss[i], 1);
+  }
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_SUBACK, MG_MQTT_QOS(1), 2 + qoss_len);
+}
   // Add user-specified variables
   s = conn->ctx->config[CGI_ENVIRONMENT];
   while ((s = next_option(s, &var_vec, NULL)) != NULL) {
     addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr);
 void mg_mqtt_unsuback(struct mg_connection *nc, uint16_t message_id) {
   mg_send_mqtt_short_command(nc, MG_MQTT_CMD_UNSUBACK, message_id);
+}
   blk->vars[blk->nvars++] = NULL;
   blk->buf[blk->len++] = '\0';
 void mg_mqtt_ping(struct mg_connection *nc) {
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGREQ, 0, 0);
+}
   assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
   assert(blk->len > 0);
   assert(blk->len < (int) sizeof(blk->buf));
 void mg_mqtt_pong(struct mg_connection *nc) {
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_PINGRESP, 0, 0);
+}
 static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
   int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
   const char *status, *status_text;
   char buf[16384], *pbuf, dir[PATH_MAX], *p;
   struct mg_request_info ri;
   struct cgi_env_block blk;
   FILE *in, *out;
   pid_t pid;
 void mg_mqtt_disconnect(struct mg_connection *nc) {
   mg_mqtt_prepend_header(nc, MG_MQTT_CMD_DISCONNECT, 0, 0);
+}
   prepare_cgi_environment(conn, prog, &blk);
 #endif /* MG_DISABLE_MQTT */
 #ifdef NS_MODULE_LINES
 #line 1 "src/mqtt-broker.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
   // CGI must be executed in its own directory. 'dir' must point to the
   // directory containing executable program, 'p' must point to the
   // executable program name relative to 'dir'.
   (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
   if ((p = strrchr(dir, DIRSEP)) != NULL) {
     *p++ = '\0';
   } else {
     dir[0] = '.', dir[1] = '\0';
     p = (char *) prog;
+  }
   pid = (pid_t) -1;
   fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
   in = out = NULL;
   if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
     send_http_error(conn, 500, http_500_error,
         "Cannot create CGI pipe: %s", strerror(ERRNO));
     goto done;
   } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
           fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
     send_http_error(conn, 500, http_500_error,
         "Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO));
     goto done;
   } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
       (out = fdopen(fd_stdout[0], "rb")) == NULL) {
     send_http_error(conn, 500, http_500_error,
         "fopen: %s", strerror(ERRNO));
     goto done;
+  }
   setbuf(in, NULL);
   setbuf(out, NULL);
   // spawn_process() must close those!
   // If we don't mark them as closed, close() attempt before
   // return from this function throws an exception on Windows.
   // Windows does not like when closed descriptor is closed again.
   fd_stdin[0] = fd_stdout[1] = -1;
   // Send POST data to the CGI process if needed
   if (!strcmp(conn->request_info.request_method, "POST") &&
       !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
     goto done;
+  }
   // Close so child gets an EOF.
   fclose(in);
   in = NULL;
   // Now read CGI reply into a buffer. We need to set correct
   // status code, thus we need to see all HTTP headers first.
   // Do not send anything back to client, until we buffer in all
   // HTTP headers.
   data_len = 0;
   headers_len = read_request(out, fc(conn->ctx), buf, sizeof(buf), &data_len);
   if (headers_len <= 0) {
     send_http_error(conn, 500, http_500_error,
                     "CGI program sent malformed or too big (>%u bytes) "
                     "HTTP headers: [%.*s]",
                     (unsigned) sizeof(buf), data_len, buf);
     goto done;
+  }
   pbuf = buf;
   buf[headers_len - 1] = '\0';
   parse_http_headers(&pbuf, &ri);
   // Make up and send the status line
   status_text = "OK";
   if ((status = get_header(&ri, "Status")) != NULL) {
     conn->request_info.status_code = atoi(status);
     status_text = status;
     while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
       status_text++;
+    }
   } else if (get_header(&ri, "Location") != NULL) {
     conn->request_info.status_code = 302;
   } else {
     conn->request_info.status_code = 200;
+  }
   if (get_header(&ri, "Connection") != NULL &&
       !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
     conn->must_close = 1;
+  }
   (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code,
                    status_text);
 /* Amalgamated: #include "internal.h" */
   // Send headers
   for (i = 0; i < ri.num_headers; i++) {
     mg_printf(conn, "%s: %s\r\n",
               ri.http_headers[i].name, ri.http_headers[i].value);
+  }
   (void) mg_write(conn, "\r\n", 2);
 #ifdef MG_ENABLE_MQTT_BROKER
   // Send chunk of data that may have been read after the headers
   conn->num_bytes_sent += mg_write(conn, buf + headers_len,
                                    (size_t)(data_len - headers_len));
 static void mg_mqtt_session_init(struct mg_mqtt_broker *brk,
                                  struct mg_mqtt_session *s,
                                  struct mg_connection *nc) {
   s->brk = brk;
   s->subscriptions = NULL;
   s->num_subscriptions = 0;
   s->nc = nc;
+}
   // Read the rest of CGI output and send to the client
   send_file_data(conn, out, INT64_MAX);
 static void mg_mqtt_add_session(struct mg_mqtt_session *s) {
   s->next = s->brk->sessions;
   s->brk->sessions = s;
   s->prev = NULL;
   if (s->next != NULL) s->next->prev = s;
+}
 done:
   if (pid != (pid_t) -1) {
     kill(pid, SIGKILL);
 static void mg_mqtt_remove_session(struct mg_mqtt_session *s) {
   if (s->prev == NULL) s->brk->sessions = s->next;
   if (s->prev) s->prev->next = s->next;
   if (s->next) s->next->prev = s->prev;
+}
   if (fd_stdin[0] != -1) {
     (void) close(fd_stdin[0]);
 static void mg_mqtt_destroy_session(struct mg_mqtt_session *s) {
   size_t i;
   for (i = 0; i < s->num_subscriptions; i++) {
     MG_FREE((void *) s->subscriptions[i].topic);
+  }
   if (fd_stdout[1] != -1) {
     (void) close(fd_stdout[1]);
   MG_FREE(s->subscriptions);
   MG_FREE(s);
+}
   if (in != NULL) {
     (void) fclose(in);
   } else if (fd_stdin[1] != -1) {
     (void) close(fd_stdin[1]);
 static void mg_mqtt_close_session(struct mg_mqtt_session *s) {
   mg_mqtt_remove_session(s);
   mg_mqtt_destroy_session(s);
+}
   if (out != NULL) {
     (void) fclose(out);
   } else if (fd_stdout[0] != -1) {
     (void) close(fd_stdout[0]);
 void mg_mqtt_broker_init(struct mg_mqtt_broker *brk, void *user_data) {
   brk->sessions = NULL;
   brk->user_data = user_data;
+}
 static void mg_mqtt_broker_handle_connect(struct mg_mqtt_broker *brk,
                                           struct mg_connection *nc) {
   struct mg_mqtt_session *s = (struct mg_mqtt_session *) malloc(sizeof *s);
   if (s == NULL) {
     /* LCOV_EXCL_START */
     mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_SERVER_UNAVAILABLE);
     return;
     /* LCOV_EXCL_STOP */
+  }
 #endif // !NO_CGI
 // For a given PUT path, create all intermediate subdirectories
 // for given path. Return 0 if the path itself is a directory,
 // or -1 on error, 1 if OK.
 static int put_dir(const char *path) {
   char buf[PATH_MAX];
   const char *s, *p;
   struct mgstat st;
   int len, res = 1;
   /* TODO(mkm): check header (magic and version) */
   for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
     len = p - path;
     if (len >= (int) sizeof(buf)) {
       res = -1;
       break;
+    }
     memcpy(buf, path, len);
     buf[len] = '\0';
   mg_mqtt_session_init(brk, s, nc);
   s->user_data = nc->user_data;
   nc->user_data = s;
   mg_mqtt_add_session(s);
     // Try to create intermediate directory
     DEBUG_TRACE(("mkdir(%s)", buf));
     if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
       res = -1;
       break;
   mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_ACCEPTED);
+}
     // Is path itself a directory?
     if (p[1] == '\0') {
       res = 0;
 static void mg_mqtt_broker_handle_subscribe(struct mg_connection *nc,
                                             struct mg_mqtt_message *msg) {
   struct mg_mqtt_session *ss = (struct mg_mqtt_session *) nc->user_data;
   uint8_t qoss[512];
   size_t qoss_len = 0;
   struct mg_str topic;
   uint8_t qos;
   int pos;
   struct mg_mqtt_topic_expression *te;
   for (pos = 0;
        (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;) {
     qoss[qoss_len++] = qos;
+  }
   ss->subscriptions = (struct mg_mqtt_topic_expression *) realloc(
       ss->subscriptions, sizeof(*ss->subscriptions) * qoss_len);
   for (pos = 0;
        (pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;
        ss->num_subscriptions++) {
     te = &ss->subscriptions[ss->num_subscriptions];
     te->topic = (char *) malloc(topic.len + 1);
     te->qos = qos;
     strncpy((char *) te->topic, topic.p, topic.len + 1);
+  }
-  return res;
+  mg_mqtt_suback(nc, qoss, qoss_len, msg->message_id);
+}
 static void put_file(struct mg_connection *conn, const char *path) {
   struct mgstat st;
   const char *range;
   int64_t r1, r2;
   FILE *fp;
   int rc;
 /*
  * Matches a topic against a topic expression
+ *
  * See http://goo.gl/iWk21X
+ *
  * Returns 1 if it matches; 0 otherwise.
  */
 static int mg_mqtt_match_topic_expression(const char *exp, const char *topic) {
   /* TODO(mkm): implement real matching */
   int len = strlen(exp);
   if (strchr(exp, '#')) {
     len -= 2;
+  }
   return strncmp(exp, topic, len) == 0;
+}
   conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
 static void mg_mqtt_broker_handle_publish(struct mg_mqtt_broker *brk,
                                           struct mg_mqtt_message *msg) {
   struct mg_mqtt_session *s;
   size_t i;
   if ((rc = put_dir(path)) == 0) {
     mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
   } else if (rc == -1) {
     send_http_error(conn, 500, http_500_error,
         "put_dir(%s): %s", path, strerror(ERRNO));
   } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
     send_http_error(conn, 500, http_500_error,
         "fopen(%s): %s", path, strerror(ERRNO));
   } else {
     set_close_on_exec(fileno(fp));
     range = mg_get_header(conn, "Content-Range");
     r1 = r2 = 0;
     if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
       conn->request_info.status_code = 206;
       // TODO(lsm): handle seek error
       (void) fseeko(fp, r1, SEEK_SET);
+    }
     if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
       (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
           conn->request_info.status_code);
     (void) fclose(fp);
   for (s = mg_mqtt_next(brk, NULL); s != NULL; s = mg_mqtt_next(brk, s)) {
     for (i = 0; i < s->num_subscriptions; i++) {
       if (mg_mqtt_match_topic_expression(s->subscriptions[i].topic,
                                          msg->topic)) {
         mg_mqtt_publish(s->nc, msg->topic, 0, 0, msg->payload.p,
                         msg->payload.len);
         break;
+      }
+    }
+  }
+}
 static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
 static void do_ssi_include(struct mg_connection *conn, const char *ssi,
                            char *tag, int include_level) {
   char file_name[MG_BUF_LEN], path[PATH_MAX], *p;
   FILE *fp;
 void mg_mqtt_broker(struct mg_connection *nc, int ev, void *data) {
   struct mg_mqtt_message *msg = (struct mg_mqtt_message *) data;
   struct mg_mqtt_broker *brk;
   // sscanf() is safe here, since send_ssi_file() also uses buffer
   // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
   if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
     // File name is relative to the webserver root
     (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
         conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name);
   } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
     // File name is relative to the webserver working directory
     // or it is absolute system path
     (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
   } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
     // File name is relative to the currect document
     (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
     if ((p = strrchr(path, DIRSEP)) != NULL) {
       p[1] = '\0';
+    }
     (void) mg_snprintf(conn, path + strlen(path),
         sizeof(path) - strlen(path), "%s", file_name);
   if (nc->listener) {
     brk = (struct mg_mqtt_broker *) nc->listener->user_data;
   } else {
     cry(conn, "Bad SSI #include: [%s]", tag);
     return;
     brk = (struct mg_mqtt_broker *) nc->user_data;
+  }
   if ((fp = mg_fopen(path, "rb")) == NULL) {
     cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
         tag, path, strerror(ERRNO));
   } else {
     set_close_on_exec(fileno(fp));
     if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
                      strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
       send_ssi_file(conn, path, fp, include_level + 1);
     } else {
       send_file_data(conn, fp, INT64_MAX);
   switch (ev) {
     case MG_EV_ACCEPT:
       mg_set_protocol_mqtt(nc);
       break;
     case MG_EV_MQTT_CONNECT:
       mg_mqtt_broker_handle_connect(brk, nc);
       break;
     case MG_EV_MQTT_SUBSCRIBE:
       mg_mqtt_broker_handle_subscribe(nc, msg);
       break;
     case MG_EV_MQTT_PUBLISH:
       mg_mqtt_broker_handle_publish(brk, msg);
       break;
     case MG_EV_CLOSE:
       if (nc->listener) {
         mg_mqtt_close_session((struct mg_mqtt_session *) nc->user_data);
+      }
-    (void) fclose(fp);
+      break;
+  }
+}
 #if !defined(NO_POPEN)
 static void do_ssi_exec(struct mg_connection *conn, char *tag) {
   char cmd[MG_BUF_LEN];
   FILE *fp;
   if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
     cry(conn, "Bad SSI #exec: [%s]", tag);
   } else if ((fp = popen(cmd, "r")) == NULL) {
     cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
   } else {
     send_file_data(conn, fp, INT64_MAX);
     (void) pclose(fp);
 struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *brk,
                                      struct mg_mqtt_session *s) {
   return s == NULL ? brk->sessions : s->next;
+}
+}
 #endif // !NO_POPEN
 static void send_ssi_file(struct mg_connection *conn, const char *path,
                           FILE *fp, int include_level) {
   char buf[MG_BUF_LEN];
   int ch, len, in_ssi_tag;
 #endif /* MG_ENABLE_MQTT_BROKER */
 #ifdef NS_MODULE_LINES
 #line 1 "src/dns.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
   if (include_level > 10) {
     cry(conn, "SSI #include level is too deep (%s)", path);
     return;
+  }
 #ifndef MG_DISABLE_DNS
   in_ssi_tag = 0;
   len = 0;
 /* Amalgamated: #include "internal.h" */
   while ((ch = fgetc(fp)) != EOF) {
     if (in_ssi_tag && ch == '>') {
       in_ssi_tag = 0;
       buf[len++] = (char) ch;
       buf[len] = '\0';
       assert(len <= (int) sizeof(buf));
       if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
         // Not an SSI tag, pass it
         (void) mg_write(conn, buf, (size_t)len);
       } else {
         if (!memcmp(buf + 5, "include", 7)) {
           do_ssi_include(conn, path, buf + 12, include_level);
 #if !defined(NO_POPEN)
         } else if (!memcmp(buf + 5, "exec", 4)) {
           do_ssi_exec(conn, buf + 9);
 #endif // !NO_POPEN
         } else {
           cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
 static int mg_dns_tid = 0xa0;
 struct mg_dns_header {
   uint16_t transaction_id;
   uint16_t flags;
   uint16_t num_questions;
   uint16_t num_answers;
   uint16_t num_authority_prs;
   uint16_t num_other_prs;
 };
 struct mg_dns_resource_record *mg_dns_next_record(
     struct mg_dns_message *msg, int query,
     struct mg_dns_resource_record *prev) {
   struct mg_dns_resource_record *rr;
   for (rr = (prev == NULL ? msg->answers : prev + 1);
        rr - msg->answers < msg->num_answers; rr++) {
     if (rr->rtype == query) {
       return rr;
+    }
+  }
       len = 0;
     } else if (in_ssi_tag) {
       if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
         // Not an SSI tag
         in_ssi_tag = 0;
       } else if (len == (int) sizeof(buf) - 2) {
         cry(conn, "%s: SSI tag is too large", path);
         len = 0;
   return NULL;
+}
       buf[len++] = ch & 0xff;
     } else if (ch == '<') {
       in_ssi_tag = 1;
       if (len > 0) {
         (void) mg_write(conn, buf, (size_t)len);
 int mg_dns_parse_record_data(struct mg_dns_message *msg,
                              struct mg_dns_resource_record *rr, void *data,
                              size_t data_len) {
   switch (rr->rtype) {
     case MG_DNS_A_RECORD:
       if (data_len < sizeof(struct in_addr)) {
         return -1;
+      }
       len = 0;
       buf[len++] = ch & 0xff;
     } else {
       buf[len++] = ch & 0xff;
       if (len == (int) sizeof(buf)) {
         (void) mg_write(conn, buf, (size_t)len);
         len = 0;
       if (rr->rdata.p + data_len > msg->pkt.p + msg->pkt.len) {
         return -1;
+      }
       memcpy(data, rr->rdata.p, data_len);
       return 0;
 #ifdef MG_ENABLE_IPV6
     case MG_DNS_AAAA_RECORD:
       if (data_len < sizeof(struct in6_addr)) {
         return -1; /* LCOV_EXCL_LINE */
+      }
       memcpy(data, rr->rdata.p, data_len);
       return 0;
 #endif
     case MG_DNS_CNAME_RECORD:
       mg_dns_uncompress_name(msg, &rr->rdata, (char *) data, data_len);
       return 0;
+  }
   // Send the rest of buffered data
   if (len > 0) {
     (void) mg_write(conn, buf, (size_t)len);
+  }
   return -1;
+}
 static void handle_ssi_file_request(struct mg_connection *conn,
                                     const char *path) {
   FILE *fp;
 int mg_dns_insert_header(struct mbuf *io, size_t pos,
                          struct mg_dns_message *msg) {
   struct mg_dns_header header;
   if ((fp = mg_fopen(path, "rb")) == NULL) {
     send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
                     strerror(ERRNO));
   } else {
     conn->must_close = 1;
     set_close_on_exec(fileno(fp));
     mg_printf(conn, "HTTP/1.1 200 OK\r\n"
               "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
               suggest_connection_header(conn));
     send_ssi_file(conn, path, fp, 0);
     (void) fclose(fp);
+  }
+}
   memset(&header, 0, sizeof(header));
   header.transaction_id = msg->transaction_id;
   header.flags = htons(msg->flags);
   header.num_questions = htons(msg->num_questions);
   header.num_answers = htons(msg->num_answers);
 static void send_options(struct mg_connection *conn) {
   conn->request_info.status_code = 200;
   return mbuf_insert(io, pos, &header, sizeof(header));
+}
   (void) mg_printf(conn,
       "HTTP/1.1 200 OK\r\n"
       "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
       "DAV: 1\r\n\r\n");
 int mg_dns_copy_body(struct mbuf *io, struct mg_dns_message *msg) {
   return mbuf_append(io, msg->pkt.p + sizeof(struct mg_dns_header),
                      msg->pkt.len - sizeof(struct mg_dns_header));
+}
 // Writes PROPFIND properties for a collection element
 static void print_props(struct mg_connection *conn, const char* uri,
                         struct mgstat* st) {
   char mtime[64];
   gmt_time_string(mtime, sizeof(mtime), &st->mtime);
   conn->num_bytes_sent += mg_printf(conn,
       "<d:response>"
        "<d:href>%s</d:href>"
        "<d:propstat>"
         "<d:prop>"
          "<d:resourcetype>%s</d:resourcetype>"
          "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
          "<d:getlastmodified>%s</d:getlastmodified>"
         "</d:prop>"
         "<d:status>HTTP/1.1 200 OK</d:status>"
        "</d:propstat>"
       "</d:response>\n",
       uri,
       st->is_directory ? "<d:collection/>" : "",
       st->size,
       mtime);
 static int mg_dns_encode_name(struct mbuf *io, const char *name, size_t len) {
   const char *s;
   unsigned char n;
   size_t pos = io->len;
   do {
     if ((s = strchr(name, '.')) == NULL) {
       s = name + len;
+    }
 static void print_dav_dir_entry(struct de *de, void *data) {
   char href[PATH_MAX];
   struct mg_connection *conn = (struct mg_connection *) data;
   mg_snprintf(conn, href, sizeof(href), "%s%s",
               conn->request_info.uri, de->file_name);
   print_props(conn, href, &de->st);
     if (s - name > 127) {
       return -1; /* TODO(mkm) cover */
+    }
     n = s - name;           /* chunk length */
     mbuf_append(io, &n, 1); /* send length */
     mbuf_append(io, name, n);
 static void handle_propfind(struct mg_connection *conn, const char* path,
                             struct mgstat* st) {
   const char *depth = mg_get_header(conn, "Depth");
     if (*s == '.') {
       n++;
+    }
   conn->must_close = 1;
   conn->request_info.status_code = 207;
   mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
             "Connection: close\r\n"
             "Content-Type: text/xml; charset=utf-8\r\n\r\n");
     name += n;
     len -= n;
   } while (*s != '\0');
   mbuf_append(io, "\0", 1); /* Mark end of host name */
   conn->num_bytes_sent += mg_printf(conn,
       "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
       "<d:multistatus xmlns:d='DAV:'>\n");
   // Print properties for the requested resource itself
   print_props(conn, conn->request_info.uri, st);
   // If it is a directory, print directory entries too if Depth is not 0
   if (st->is_directory &&
       !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
       (depth == NULL || strcmp(depth, "0") != 0)) {
     scan_directory(conn, path, conn, &print_dav_dir_entry);
+  }
   conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
+}
 // This is the heart of the Mongoose's logic.
 // This function is called when the request is read, parsed and validated,
 // and Mongoose must decide what action to take: serve a file, or
 // a directory, or call embedded function, etcetera.
 static void handle_request(struct mg_connection *conn) {
   struct mg_request_info *ri = &conn->request_info;
   char path[PATH_MAX];
   int stat_result, uri_len;
   struct mgstat st;
   if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
     *conn->request_info.query_string++ = '\0';
+  }
   uri_len = (int) strlen(ri->uri);
   url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
   remove_double_dots_and_double_slashes(ri->uri);
   stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st);
   DEBUG_TRACE(("%s", ri->uri));
   if (!check_authorization(conn, path)) {
     send_authorization_request(conn);
   } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
     // Do nothing, callback has served the request
   } else if (!strcmp(ri->request_method, "OPTIONS")) {
     send_options(conn);
   } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
     send_http_error(conn, 404, "Not Found", "Not Found");
   } else if ((!strcmp(ri->request_method, "PUT") ||
         !strcmp(ri->request_method, "DELETE")) &&
       (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
        is_authorized_for_put(conn) != 1)) {
     send_authorization_request(conn);
   } else if (!strcmp(ri->request_method, "PUT")) {
     put_file(conn, path);
   } else if (!strcmp(ri->request_method, "DELETE")) {
     if (mg_remove(path) == 0) {
       send_http_error(conn, 200, "OK", "%s", "");
     } else {
       send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
                       strerror(ERRNO));
+    }
   } else if (stat_result != 0 || must_hide_file(conn, path)) {
     send_http_error(conn, 404, "Not Found", "%s", "File not found");
   } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
     (void) mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n"
                      "Location: %s/\r\n\r\n", ri->uri);
   } else if (!strcmp(ri->request_method, "PROPFIND")) {
     handle_propfind(conn, path, &st);
   } else if (st.is_directory &&
              !substitute_index_file(conn, path, sizeof(path), &st)) {
     if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
       handle_directory_request(conn, path);
     } else {
       send_http_error(conn, 403, "Directory Listing Denied",
           "Directory listing denied");
   return io->len - pos;
+}
 #if !defined(NO_CGI)
   } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
                           strlen(conn->ctx->config[CGI_EXTENSIONS]),
                           path) > 0) {
     if (strcmp(ri->request_method, "POST") &&
         strcmp(ri->request_method, "GET")) {
       send_http_error(conn, 501, "Not Implemented",
                       "Method %s is not implemented", ri->request_method);
     } else {
       handle_cgi_request(conn, path);
 int mg_dns_encode_record(struct mbuf *io, struct mg_dns_resource_record *rr,
                          const char *name, size_t nlen, const void *rdata,
                          size_t rlen) {
   size_t pos = io->len;
   uint16_t u16;
   uint32_t u32;
   if (rr->kind == MG_DNS_INVALID_RECORD) {
     return -1; /* LCOV_EXCL_LINE */
+  }
 #endif // !NO_CGI
   } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
                           strlen(conn->ctx->config[SSI_EXTENSIONS]),
                           path) > 0) {
     handle_ssi_file_request(conn, path);
   } else if (is_not_modified(conn, &st)) {
     send_http_error(conn, 304, "Not Modified", "%s", "");
   if (mg_dns_encode_name(io, name, nlen) == -1) {
     return -1;
+  }
   u16 = htons(rr->rtype);
   mbuf_append(io, &u16, 2);
   u16 = htons(rr->rclass);
   mbuf_append(io, &u16, 2);
   if (rr->kind == MG_DNS_ANSWER) {
     u32 = htonl(rr->ttl);
     mbuf_append(io, &u32, 4);
     if (rr->rtype == MG_DNS_CNAME_RECORD) {
       int clen;
       /* fill size after encoding */
       size_t off = io->len;
       mbuf_append(io, &u16, 2);
       if ((clen = mg_dns_encode_name(io, (const char *) rdata, rlen)) == -1) {
         return -1;
+      }
       u16 = clen;
       io->buf[off] = u16 >> 8;
       io->buf[off + 1] = u16 & 0xff;
     } else {
     handle_file_request(conn, path, &st);
       u16 = htons(rlen);
       mbuf_append(io, &u16, 2);
       mbuf_append(io, rdata, rlen);
+    }
+  }
 static void close_all_listening_sockets(struct mg_context *ctx) {
   struct socket *sp, *tmp;
   for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
     tmp = sp->next;
     (void) closesocket(sp->sock);
     free(sp);
+  }
   return io->len - pos;
+}
 // Valid listening port specification is: [ip_address:]port[s]
 // Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s
 // TODO(lsm): add parsing of the IPv6 address
 static int parse_port_string(const struct vec *vec, struct socket *so) {
   int a, b, c, d, port, len;
 void mg_send_dns_query(struct mg_connection *nc, const char *name,
                        int query_type) {
   struct mg_dns_message *msg =
       (struct mg_dns_message *) MG_CALLOC(1, sizeof(*msg));
   struct mbuf pkt;
   struct mg_dns_resource_record *rr = &msg->questions[0];
   // MacOS needs that. If we do not zero it, subsequent bind() will fail.
   // Also, all-zeroes in the socket address means binding to all addresses
   // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
   memset(so, 0, sizeof(*so));
   DBG(("%s %d", name, query_type));
   if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
     // Bind to a specific IPv4 address
     so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
   } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 ||
              len <= 0 ||
              len > (int) vec->len ||
              (vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) {
     return 0;
+  }
   mbuf_init(&pkt, 64 /* Start small, it'll grow as needed. */);
   so->is_ssl = vec->ptr[len] == 's';
 #if defined(USE_IPV6)
   so->lsa.sin6.sin6_family = AF_INET6;
   so->lsa.sin6.sin6_port = htons((uint16_t) port);
 #else
   so->lsa.sin.sin_family = AF_INET;
   so->lsa.sin.sin_port = htons((uint16_t) port);
 #endif
   msg->transaction_id = ++mg_dns_tid;
   msg->flags = 0x100;
   msg->num_questions = 1;
   return 1;
+}
   mg_dns_insert_header(&pkt, 0, msg);
 static int set_ports_option(struct mg_context *ctx) {
   const char *list = ctx->config[LISTENING_PORTS];
   int on = 1, success = 1;
   SOCKET sock;
   struct vec vec;
   struct socket so, *listener;
   while (success && (list = next_option(list, &vec, NULL)) != NULL) {
     if (!parse_port_string(&vec, &so)) {
       cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
           __func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
       success = 0;
     } else if (so.is_ssl &&
                (ctx->ssl_ctx == NULL || ctx->config[SSL_CERTIFICATE] == NULL)) {
       cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
       success = 0;
     } else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
                INVALID_SOCKET ||
 #if !defined(_WIN32)
                // On Windows, SO_REUSEADDR is recommended only for
                // broadcast UDP sockets
                setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
                           sizeof(on)) != 0 ||
 #endif // !_WIN32
                // Set TCP keep-alive. This is needed because if HTTP-level
                // keep-alive is enabled, and client resets the connection,
                // server won't get TCP FIN or RST and will keep the connection
                // open forever. With TCP keep-alive, next keep-alive
                // handshake will figure out that the client is down and
                // will close the server end.
                // Thanks to Igor Klopov who suggested the patch.
                setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
                           sizeof(on)) != 0 ||
                bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 ||
                listen(sock, SOMAXCONN) != 0) {
       closesocket(sock);
       cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
           vec.len, vec.ptr, strerror(ERRNO));
       success = 0;
     } else if ((listener = (struct socket *)
                 calloc(1, sizeof(*listener))) == NULL) {
       // NOTE(lsm): order is important: call cry before closesocket(),
       // cause closesocket() alters the errno.
       cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
       closesocket(sock);
       success = 0;
     } else {
       *listener = so;
       listener->sock = sock;
       set_close_on_exec(listener->sock);
       listener->next = ctx->listening_sockets;
       ctx->listening_sockets = listener;
+    }
   rr->rtype = query_type;
   rr->rclass = 1; /* Class: inet */
   rr->kind = MG_DNS_QUESTION;
   if (mg_dns_encode_record(&pkt, rr, name, strlen(name), NULL, 0) == -1) {
     /* TODO(mkm): return an error code */
     goto cleanup; /* LCOV_EXCL_LINE */
+  }
   if (!success) {
     close_all_listening_sockets(ctx);
   /* TCP DNS requires messages to be prefixed with len */
   if (!(nc->flags & MG_F_UDP)) {
     uint16_t len = htons(pkt.len);
     mbuf_insert(&pkt, 0, &len, 2);
+  }
   return success;
   mg_send(nc, pkt.buf, pkt.len);
   mbuf_free(&pkt);
 cleanup:
   MG_FREE(msg);
+}
 static void log_header(const struct mg_connection *conn, const char *header,
                        FILE *fp) {
   const char *header_value;
 static unsigned char *mg_parse_dns_resource_record(
     unsigned char *data, unsigned char *end, struct mg_dns_resource_record *rr,
     int reply) {
   unsigned char *name = data;
   int chunk_len, data_len;
   if ((header_value = mg_get_header(conn, header)) == NULL) {
     (void) fprintf(fp, "%s", " -");
   } else {
     (void) fprintf(fp, " \"%s\"", header_value);
   while (data < end && (chunk_len = *data)) {
     if (((unsigned char *) data)[0] & 0xc0) {
       data += 1;
       break;
+    }
     data += chunk_len + 1;
+  }
 static void log_access(const struct mg_connection *conn) {
   const struct mg_request_info *ri;
   FILE *fp;
   char date[64], src_addr[20];
   rr->name.p = (char *) name;
   rr->name.len = data - name + 1;
   data++;
   if (data > end - 4) {
     return data;
+  }
   fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ?  NULL :
     mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
   rr->rtype = data[0] << 8 | data[1];
   data += 2;
   if (fp == NULL)
     return;
   rr->rclass = data[0] << 8 | data[1];
   data += 2;
   strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
            localtime(&conn->birth_time));
   rr->kind = reply ? MG_DNS_ANSWER : MG_DNS_QUESTION;
   if (reply) {
     if (data >= end - 6) {
       return data;
+    }
   ri = &conn->request_info;
   flockfile(fp);
     rr->ttl = (uint32_t) data[0] << 24 | (uint32_t) data[1] << 16 |
               data[2] << 8 | data[3];
     data += 4;
   sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
   fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
           src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
           ri->request_method ? ri->request_method : "-",
           ri->uri ? ri->uri : "-", ri->http_version,
           conn->request_info.status_code, conn->num_bytes_sent);
   log_header(conn, "Referer", fp);
   log_header(conn, "User-Agent", fp);
   fputc('\n', fp);
   fflush(fp);
     data_len = *data << 8 | *(data + 1);
     data += 2;
   funlockfile(fp);
   fclose(fp);
     rr->rdata.p = (char *) data;
     rr->rdata.len = data_len;
     data += data_len;
+  }
   return data;
+}
 static int isbyte(int n) {
   return n >= 0 && n <= 255;
 int mg_parse_dns(const char *buf, int len, struct mg_dns_message *msg) {
   struct mg_dns_header *header = (struct mg_dns_header *) buf;
   unsigned char *data = (unsigned char *) buf + sizeof(*header);
   unsigned char *end = (unsigned char *) buf + len;
   int i;
   msg->pkt.p = buf;
   msg->pkt.len = len;
   if (len < (int) sizeof(*header)) {
     return -1; /* LCOV_EXCL_LINE */
+  }
 // Verify given socket address against the ACL.
 // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
 static int check_acl(struct mg_context *ctx, const union usa *usa) {
   int a, b, c, d, n, mask, allowed;
   char flag;
   uint32_t acl_subnet, acl_mask, remote_ip;
   struct vec vec;
   const char *list = ctx->config[ACCESS_CONTROL_LIST];
   msg->transaction_id = header->transaction_id;
   msg->flags = ntohs(header->flags);
   msg->num_questions = ntohs(header->num_questions);
   msg->num_answers = ntohs(header->num_answers);
   if (list == NULL) {
     return 1;
   for (i = 0; i < msg->num_questions && i < (int) ARRAY_SIZE(msg->questions);
        i++) {
     data = mg_parse_dns_resource_record(data, end, &msg->questions[i], 0);
+  }
   (void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip));
   for (i = 0; i < msg->num_answers && i < (int) ARRAY_SIZE(msg->answers); i++) {
     data = mg_parse_dns_resource_record(data, end, &msg->answers[i], 1);
+  }
   // If any ACL is set, deny by default
   allowed = '-';
   return 0;
+}
   while ((list = next_option(list, &vec, NULL)) != NULL) {
     mask = 32;
 size_t mg_dns_uncompress_name(struct mg_dns_message *msg, struct mg_str *name,
                               char *dst, int dst_len) {
   int chunk_len;
   char *old_dst = dst;
   const unsigned char *data = (unsigned char *) name->p;
   const unsigned char *end = (unsigned char *) msg->pkt.p + msg->pkt.len;
     if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
       cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
       return -1;
     } else if (flag != '+' && flag != '-') {
       cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
       return -1;
     } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
       cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
       return -1;
     } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
       // Do nothing, no mask specified
     } else if (mask < 0 || mask > 32) {
       cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
       return -1;
   if (data >= end) {
     return 0;
+  }
     acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
     acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
   while ((chunk_len = *data++)) {
     int leeway = dst_len - (dst - old_dst);
     if (data >= end) {
       return 0;
+    }
     if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
       allowed = flag;
     if (chunk_len & 0xc0) {
       uint16_t off = (data[-1] & (~0xc0)) << 8 | data[0];
       if (off >= msg->pkt.len) {
         return 0;
+      }
       data = (unsigned char *) msg->pkt.p + off;
       continue;
+    }
     if (chunk_len > leeway) {
       chunk_len = leeway;
+    }
   return allowed == '+';
     if (data + chunk_len >= end) {
       return 0;
+    }
     memcpy(dst, data, chunk_len);
     data += chunk_len;
     dst += chunk_len;
     leeway -= chunk_len;
     if (leeway == 0) {
       return dst - old_dst;
+    }
     *dst++ = '.';
+  }
 static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
   FD_SET(fd, set);
   if (fd > (SOCKET) *max_fd) {
     *max_fd = (int) fd;
   if (dst != old_dst) {
     *--dst = 0;
+  }
   return dst - old_dst;
+}
 #if !defined(_WIN32)
 static int set_uid_option(struct mg_context *ctx) {
   struct passwd *pw;
   const char *uid = ctx->config[RUN_AS_USER];
   int success = 0;
 static void dns_handler(struct mg_connection *nc, int ev, void *ev_data) {
   struct mbuf *io = &nc->recv_mbuf;
   struct mg_dns_message msg;
   if (uid == NULL) {
     success = 1;
   } else {
     if ((pw = getpwnam(uid)) == NULL) {
       cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
     } else if (setgid(pw->pw_gid) == -1) {
       cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
     } else if (setuid(pw->pw_uid) == -1) {
       cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
   /* Pass low-level events to the user handler */
   nc->handler(nc, ev, ev_data);
   switch (ev) {
     case MG_EV_RECV:
       if (!(nc->flags & MG_F_UDP)) {
         mbuf_remove(&nc->recv_mbuf, 2);
+      }
       if (mg_parse_dns(nc->recv_mbuf.buf, nc->recv_mbuf.len, &msg) == -1) {
         /* reply + recursion allowed + format error */
         memset(&msg, 0, sizeof(msg));
         msg.flags = 0x8081;
         mg_dns_insert_header(io, 0, &msg);
         if (!(nc->flags & MG_F_UDP)) {
           uint16_t len = htons(io->len);
           mbuf_insert(io, 0, &len, 2);
+        }
         mg_send(nc, io->buf, io->len);
       } else {
       success = 1;
         /* Call user handler with parsed message */
         nc->handler(nc, MG_DNS_MESSAGE, &msg);
+      }
       mbuf_remove(io, io->len);
       break;
+  }
+}
   return success;
 void mg_set_protocol_dns(struct mg_connection *nc) {
   nc->proto_handler = dns_handler;
+}
 #endif // !_WIN32
 #if !defined(NO_SSL)
 static pthread_mutex_t *ssl_mutexes;
 #endif /* MG_DISABLE_DNS */
 #ifdef NS_MODULE_LINES
 #line 1 "src/dns-server.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #ifdef MG_ENABLE_DNS_SERVER
 /* Amalgamated: #include "internal.h" */
 struct mg_dns_reply mg_dns_create_reply(struct mbuf *io,
                                         struct mg_dns_message *msg) {
   struct mg_dns_reply rep;
   rep.msg = msg;
   rep.io = io;
   rep.start = io->len;
   /* reply + recursion allowed */
   msg->flags |= 0x8080;
   mg_dns_copy_body(io, msg);
 // Return OpenSSL error message
 static const char *ssl_error(void) {
   unsigned long err;
   err = ERR_get_error();
   return err == 0 ? "" : ERR_error_string(err, NULL);
   msg->num_answers = 0;
   return rep;
+}
 static void ssl_locking_callback(int mode, int mutex_num, const char *file,
                                  int line) {
   line = 0;    // Unused
   file = NULL; // Unused
 void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) {
   size_t sent = r->io->len - r->start;
   mg_dns_insert_header(r->io, r->start, r->msg);
   if (!(nc->flags & MG_F_UDP)) {
     uint16_t len = htons(sent);
     mbuf_insert(r->io, r->start, &len, 2);
+  }
   if (mode & CRYPTO_LOCK) {
     (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
   } else {
     (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
   if (&nc->send_mbuf != r->io) {
     mg_send(nc, r->io->buf + r->start, r->io->len - r->start);
     r->io->len = r->start;
+  }
+}
 static unsigned long ssl_id_callback(void) {
   return (unsigned long) pthread_self();
 int mg_dns_reply_record(struct mg_dns_reply *reply,
                         struct mg_dns_resource_record *question,
                         const char *name, int rtype, int ttl, const void *rdata,
                         size_t rdata_len) {
   struct mg_dns_message *msg = (struct mg_dns_message *) reply->msg;
   char rname[512];
   struct mg_dns_resource_record *ans = &msg->answers[msg->num_answers];
   if (msg->num_answers >= MG_MAX_DNS_ANSWERS) {
     return -1; /* LCOV_EXCL_LINE */
+  }
   if (name == NULL) {
     name = rname;
     rname[511] = 0;
     mg_dns_uncompress_name(msg, &question->name, rname, sizeof(rname) - 1);
+  }
 #if !defined(NO_SSL_DL)
 static int load_dll(struct mg_context *ctx, const char *dll_name,
                     struct ssl_func *sw) {
   union {void *p; void (*fp)(void);} u;
   void  *dll_handle;
   struct ssl_func *fp;
   *ans = *question;
   ans->kind = MG_DNS_ANSWER;
   ans->rtype = rtype;
   ans->ttl = ttl;
   if (mg_dns_encode_record(reply->io, ans, name, strlen(name), rdata,
                            rdata_len) == -1) {
     return -1; /* LCOV_EXCL_LINE */
   };
   if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
     cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
   msg->num_answers++;
   return 0;
+}
   for (fp = sw; fp->name != NULL; fp++) {
 #endif /* MG_ENABLE_DNS_SERVER */
 #ifdef NS_MODULE_LINES
 #line 1 "src/resolv.c"
 /**/
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef MG_DISABLE_RESOLVER
 /* Amalgamated: #include "internal.h" */
 #ifndef MG_DEFAULT_NAMESERVER
 #define MG_DEFAULT_NAMESERVER "8.8.8.8"
 #endif
 static const char *mg_default_dns_server = "udp://" MG_DEFAULT_NAMESERVER ":53";
 MG_INTERNAL char mg_dns_server[256];
 struct mg_resolve_async_request {
   char name[1024];
   int query;
   mg_resolve_callback_t callback;
   void *data;
   time_t timeout;
   int max_retries;
   /* state */
   time_t last_time;
   int retries;
 };
 /*
  * Find what nameserver to use.
+ *
  * Return 0 if OK, -1 if error
  */
 static int mg_get_ip_address_of_nameserver(char *name, size_t name_len) {
   int ret = -1;
 #ifdef _WIN32
     // GetProcAddress() returns pointer to function
     u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
 #else
     // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
     // function pointers. We need to use a union to make a cast.
     u.p = dlsym(dll_handle, fp->name);
 #endif // _WIN32
     if (u.fp == NULL) {
       cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
       return 0;
   int i;
   LONG err;
   HKEY hKey, hSub;
   char subkey[512], value[128],
       *key = "SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces";
   if ((err = RegOpenKey(HKEY_LOCAL_MACHINE, key, &hKey)) != ERROR_SUCCESS) {
     fprintf(stderr, "cannot open reg key %s: %d\n", key, err);
     ret = -1;
   } else {
       fp->ptr = u.fp;
     for (ret = -1, i = 0;
          RegEnumKey(hKey, i, subkey, sizeof(subkey)) == ERROR_SUCCESS; i++) {
       DWORD type, len = sizeof(value);
       if (RegOpenKey(hKey, subkey, &hSub) == ERROR_SUCCESS &&
           (RegQueryValueEx(hSub, "NameServer", 0, &type, (void *) value,
                            &len) == ERROR_SUCCESS ||
            RegQueryValueEx(hSub, "DhcpNameServer", 0, &type, (void *) value,
                            &len) == ERROR_SUCCESS)) {
         /*
          * See https://github.com/cesanta/mongoose/issues/176
          * The value taken from the registry can be empty, a single
          * IP address, or multiple IP addresses separated by comma.
          * If it's empty, check the next interface.
          * If it's multiple IP addresses, take the first one.
          */
         char *comma = strchr(value, ',');
         if (value[0] == '\0') {
           continue;
+        }
         if (comma != NULL) {
           *comma = '\0';
+        }
   return 1;
         snprintf(name, name_len, "udp://%s:53", value);
         ret = 0;
         RegCloseKey(hSub);
         break;
+      }
+    }
     RegCloseKey(hKey);
+  }
 #endif // NO_SSL_DL
 #elif !defined(MG_DISABLE_FILESYSTEM)
   FILE *fp;
   char line[512];
 // Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
 static int set_ssl_option(struct mg_context *ctx) {
   struct mg_request_info request_info;
   int i, size;
   const char *pem = ctx->config[SSL_CERTIFICATE];
   const char *chain = ctx->config[SSL_CHAIN_FILE];
   if ((fp = fopen("/etc/resolv.conf", "r")) == NULL) {
     ret = -1;
   } else {
     /* Try to figure out what nameserver to use */
     for (ret = -1; fgets(line, sizeof(line), fp) != NULL;) {
       char buf[256];
       if (sscanf(line, "nameserver %255[^\n\t #]s", buf) == 1) {
         snprintf(name, name_len, "udp://%s:53", buf);
         ret = 0;
         break;
+      }
+    }
     (void) fclose(fp);
+  }
 #else
   snprintf(name, name_len, "%s", mg_default_dns_server);
 #endif /* _WIN32 */
 #if !defined(NO_SSL_DL)
   if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
       !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
     return 0;
   return ret;
+}
 #endif // NO_SSL_DL
   // Initialize SSL crap
   SSL_library_init();
   SSL_load_error_strings();
 int mg_resolve_from_hosts_file(const char *name, union socket_address *usa) {
 #ifndef MG_DISABLE_FILESYSTEM
   /* TODO(mkm) cache /etc/hosts */
   FILE *fp;
   char line[1024];
   char *p;
   char alias[256];
   unsigned int a, b, c, d;
   int len = 0;
   if ((ctx->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) {
     cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
   if ((fp = fopen("/etc/hosts", "r")) == NULL) {
     return -1;
+  }
   if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
     cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
   } else if (ctx->user_callback != NULL) {
     memset(&request_info, 0, sizeof(request_info));
     request_info.user_data = ctx->user_data;
     ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) ctx->ssl_ctx);
+  }
   for (; fgets(line, sizeof(line), fp) != NULL;) {
     if (line[0] == '#') continue;
   if (ctx->ssl_ctx != NULL && pem != NULL &&
       SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, SSL_FILETYPE_PEM) == 0) {
     cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
     return 0;
     if (sscanf(line, "%u.%u.%u.%u%n", &a, &b, &c, &d, &len) == 0) {
       /* TODO(mkm): handle ipv6 */
       continue;
+    }
   if (ctx->ssl_ctx != NULL && pem != NULL &&
       SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, pem, SSL_FILETYPE_PEM) == 0) {
     cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
     for (p = line + len; sscanf(p, "%s%n", alias, &len) == 1; p += len) {
       if (strcmp(alias, name) == 0) {
         usa->sin.sin_addr.s_addr = htonl(a << 24 | b << 16 | c << 8 | d);
         fclose(fp);
         return 0;
+      }
   if (ctx->ssl_ctx != NULL && chain != NULL &&
       SSL_CTX_use_certificate_chain_file(ctx->ssl_ctx, chain) == 0) {
     cry(fc(ctx), "%s: cannot open %s: %s", __func__, chain, ssl_error());
     return 0;
+    }
   // Initialize locking callbacks, needed for thread safety.
   // http://www.openssl.org/support/faq.html#PROG1
   size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
   if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
     cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
     return 0;
+  }
   for (i = 0; i < CRYPTO_num_locks(); i++) {
     pthread_mutex_init(&ssl_mutexes[i], NULL);
   fclose(fp);
 #endif
   return -1;
+}
   CRYPTO_set_locking_callback(&ssl_locking_callback);
   CRYPTO_set_id_callback(&ssl_id_callback);
 static void mg_resolve_async_eh(struct mg_connection *nc, int ev, void *data) {
   time_t now = time(NULL);
   struct mg_resolve_async_request *req;
   struct mg_dns_message *msg;
   return 1;
+}
   DBG(("ev=%d", ev));
 static void uninitialize_ssl(struct mg_context *ctx) {
   int i;
   if (ctx->ssl_ctx != NULL) {
     CRYPTO_set_locking_callback(NULL);
     for (i = 0; i < CRYPTO_num_locks(); i++) {
       pthread_mutex_destroy(&ssl_mutexes[i]);
   req = (struct mg_resolve_async_request *) nc->user_data;
   switch (ev) {
     case MG_EV_CONNECT:
     case MG_EV_POLL:
       if (req->retries > req->max_retries) {
         nc->flags |= MG_F_CLOSE_IMMEDIATELY;
         break;
+      }
     CRYPTO_set_locking_callback(NULL);
     CRYPTO_set_id_callback(NULL);
       if (now - req->last_time >= req->timeout) {
         mg_send_dns_query(nc, req->name, req->query);
         req->last_time = now;
         req->retries++;
+      }
       break;
     case MG_EV_RECV:
       msg = (struct mg_dns_message *) MG_MALLOC(sizeof(*msg));
       if (mg_parse_dns(nc->recv_mbuf.buf, *(int *) data, msg) == 0 &&
           msg->num_answers > 0) {
         req->callback(msg, req->data);
         nc->user_data = NULL;
         MG_FREE(req);
+      }
       MG_FREE(msg);
       nc->flags |= MG_F_CLOSE_IMMEDIATELY;
       break;
     case MG_EV_SEND:
       /*
        * If a send error occurs, prevent closing of the connection by the core.
        * We will retry after timeout.
        */
       nc->flags &= ~MG_F_CLOSE_IMMEDIATELY;
       mbuf_remove(&nc->send_mbuf, nc->send_mbuf.len);
       break;
     case MG_EV_CLOSE:
       /* If we got here with request still not done, fire an error callback. */
       if (req != NULL) {
         req->callback(NULL, req->data);
         nc->user_data = NULL;
         MG_FREE(req);
+      }
 #endif // !NO_SSL
 static int set_gpass_option(struct mg_context *ctx) {
   struct mgstat mgstat;
   const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
   return path == NULL || mg_stat(path, &mgstat) == 0;
       break;
+  }
 static int set_acl_option(struct mg_context *ctx) {
   union usa fake;
   return check_acl(ctx, &fake) != -1;
+}
 static void reset_per_request_attributes(struct mg_connection *conn) {
   conn->path_info = conn->body = conn->next_request = NULL;
   conn->num_bytes_sent = conn->consumed_content = 0;
   conn->content_len = -1;
   conn->request_len = conn->data_len = 0;
   conn->must_close = 0;
 int mg_resolve_async(struct mg_mgr *mgr, const char *name, int query,
                      mg_resolve_callback_t cb, void *data) {
   struct mg_resolve_async_opts opts;
   memset(&opts, 0, sizeof(opts));
   return mg_resolve_async_opt(mgr, name, query, cb, data, opts);
+}
 static void close_socket_gracefully(struct mg_connection *conn) {
   char buf[MG_BUF_LEN];
   struct linger linger;
   int n, sock = conn->client.sock;
 int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query,
                          mg_resolve_callback_t cb, void *data,
                          struct mg_resolve_async_opts opts) {
   struct mg_resolve_async_request *req;
   struct mg_connection *dns_nc;
   const char *nameserver = opts.nameserver_url;
   // Set linger option to avoid socket hanging out after close. This prevent
   // ephemeral port exhaust problem under high QPS.
   linger.l_onoff = 1;
   linger.l_linger = 1;
   setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger));
   DBG(("%s %d", name, query));
   // Send FIN to the client
   (void) shutdown(sock, SHUT_WR);
   set_non_blocking_mode(sock);
   /* resolve with DNS */
   req = (struct mg_resolve_async_request *) MG_CALLOC(1, sizeof(*req));
   if (req == NULL) {
     return -1;
+  }
   // Read and discard pending incoming data. If we do not do that and close the
   // socket, the data in the send buffer may be discarded. This
   // behaviour is seen on Windows, when client keeps sending data
   // when server decides to close the connection; then when client
   // does recv() it gets no data back.
   do {
     n = pull(NULL, conn, buf, sizeof(buf));
   } while (n > 0);
   strncpy(req->name, name, sizeof(req->name));
   req->query = query;
   req->callback = cb;
   req->data = data;
   /* TODO(mkm): parse defaults out of resolve.conf */
   req->max_retries = opts.max_retries ? opts.max_retries : 2;
   req->timeout = opts.timeout ? opts.timeout : 5;
   // Now we know that our FIN is ACK-ed, safe to close
   (void) closesocket(sock);
   /* Lazily initialize dns server */
   if (nameserver == NULL && mg_dns_server[0] == '\0' &&
       mg_get_ip_address_of_nameserver(mg_dns_server, sizeof(mg_dns_server)) ==
           -1) {
     strncpy(mg_dns_server, mg_default_dns_server, sizeof(mg_dns_server));
+  }
 static void close_connection(struct mg_connection *conn) {
   if (conn->ssl) {
     SSL_free(conn->ssl);
     conn->ssl = NULL;
   if (nameserver == NULL) {
     nameserver = mg_dns_server;
+  }
   if (conn->client.sock != INVALID_SOCKET) {
     close_socket_gracefully(conn);
+  }
   dns_nc = mg_connect(mgr, nameserver, mg_resolve_async_eh);
   if (dns_nc == NULL) {
     free(req);
     return -1;
+  }
   dns_nc->user_data = req;
 void mg_close_connection(struct mg_connection *conn) {
   close_connection(conn);
   free(conn);
   return 0;
+}
 struct mg_connection *mg_connect(struct mg_context *ctx,
                                  const char *host, int port, int use_ssl) {
   struct mg_connection *newconn = NULL;
   struct sockaddr_in sin;
   struct hostent *he;
   int sock;
   if (ctx->client_ssl_ctx == NULL && use_ssl) {
     cry(fc(ctx), "%s: SSL is not initialized", __func__);
   } else if ((he = gethostbyname(host)) == NULL) {
     cry(fc(ctx), "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
   } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
     cry(fc(ctx), "%s: socket: %s", __func__, strerror(ERRNO));
 #endif /* MG_DISABLE_RESOLVE */
 #ifdef NS_MODULE_LINES
 #line 1 "src/coap.c"
 /**/
 #endif
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /* Amalgamated: #include "internal.h" */
 #ifdef MG_ENABLE_COAP
 void mg_coap_free_options(struct mg_coap_message *cm) {
   while (cm->options != NULL) {
     struct mg_coap_option *next = cm->options->next;
     MG_FREE(cm->options);
     cm->options = next;
+  }
+}
 struct mg_coap_option *mg_coap_add_option(struct mg_coap_message *cm,
                                           uint32_t number, char *value,
                                           size_t len) {
   struct mg_coap_option *new_option =
       (struct mg_coap_option *) MG_CALLOC(1, sizeof(*new_option));
   new_option->number = number;
   new_option->value.p = value;
   new_option->value.len = len;
   if (cm->options == NULL) {
     cm->options = cm->optiomg_tail = new_option;
   } else {
     sin.sin_family = AF_INET;
     sin.sin_port = htons((uint16_t) port);
     sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
     if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
       cry(fc(ctx), "%s: connect(%s:%d): %s", __func__, host, port,
           strerror(ERRNO));
       closesocket(sock);
     } else if ((newconn = (struct mg_connection *)
                 calloc(1, sizeof(*newconn))) == NULL) {
       cry(fc(ctx), "%s: calloc: %s", __func__, strerror(ERRNO));
       closesocket(sock);
     /*
      * A very simple attention to help clients to compose options:
      * CoAP wants to see options ASC ordered.
      * Could be change by using sort in coap_compose
      */
     if (cm->optiomg_tail->number <= new_option->number) {
       /* if option is already ordered just add it */
       cm->optiomg_tail = cm->optiomg_tail->next = new_option;
     } else {
       newconn->ctx = ctx;
       newconn->client.sock = sock;
       newconn->client.rsa.sin = sin;
       newconn->client.is_ssl = use_ssl;
       if (use_ssl) {
         sslize(newconn, ctx->client_ssl_ctx, SSL_connect);
+      }
       /* looking for appropriate position */
       struct mg_coap_option *current_opt = cm->options;
       struct mg_coap_option *prev_opt = 0;
       while (current_opt != NULL) {
         if (current_opt->number > new_option->number) {
           break;
+        }
         prev_opt = current_opt;
         current_opt = current_opt->next;
+      }
   return newconn;
       if (prev_opt != NULL) {
         prev_opt->next = new_option;
         new_option->next = current_opt;
       } else {
         /* insert new_option to the beginning */
         new_option->next = cm->options;
         cm->options = new_option;
+      }
+    }
+  }
 FILE *mg_fetch(struct mg_context *ctx, const char *url, const char *path,
                char *buf, size_t buf_len, struct mg_request_info *ri) {
   struct mg_connection *newconn;
   int n, req_length, data_length, port;
   char host[1025], proto[10], buf2[MG_BUF_LEN];
   FILE *fp = NULL;
   return new_option;
+}
   if (sscanf(url, "%9[htps]://%1024[^:]:%d/%n", proto, host, &port, &n) == 3) {
   } else if (sscanf(url, "%9[htps]://%1024[^/]/%n", proto, host, &n) == 2) {
     port = mg_strcasecmp(proto, "https") == 0 ? 443 : 80;
   } else {
     cry(fc(ctx), "%s: invalid URL: [%s]", __func__, url);
 /*
  * Fills CoAP header in mg_coap_message.
+ *
  * Helper function.
  */
 static char *coap_parse_header(char *ptr, struct mbuf *io,
                                struct mg_coap_message *cm) {
   if (io->len < sizeof(uint32_t)) {
     cm->flags |= MG_COAP_NOT_ENOUGH_DATA;
     return NULL;
+  }
   if ((newconn = mg_connect(ctx, host, port,
                             !strcmp(proto, "https"))) == NULL) {
     cry(fc(ctx), "%s: mg_connect(%s): %s", __func__, url, strerror(ERRNO));
   } else {
     mg_printf(newconn, "GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n", url + n, host);
     data_length = 0;
     req_length = read_request(NULL, newconn, buf, buf_len, &data_length);
     if (req_length <= 0) {
       cry(fc(ctx), "%s(%s): invalid HTTP reply", __func__, url);
     } else if (parse_http_response(buf, req_length, ri) <= 0) {
       cry(fc(ctx), "%s(%s): cannot parse HTTP headers", __func__, url);
     } else if ((fp = fopen(path, "w+b")) == NULL) {
       cry(fc(ctx), "%s: fopen(%s): %s", __func__, path, strerror(ERRNO));
     } else {
       // Write chunk of data that may be in the user's buffer
       data_length -= req_length;
       if (data_length > 0 &&
         fwrite(buf + req_length, 1, data_length, fp) != (size_t) data_length) {
         cry(fc(ctx), "%s: fwrite(%s): %s", __func__, path, strerror(ERRNO));
         fclose(fp);
         fp = NULL;
+      }
       // Read the rest of the response and write it to the file. Do not use
       // mg_read() cause we didn't set newconn->content_len properly.
       while (fp && (data_length = pull(0, newconn, buf2, sizeof(buf2))) > 0) {
         if (fwrite(buf2, 1, data_length, fp) != (size_t) data_length) {
           cry(fc(ctx), "%s: fwrite(%s): %s", __func__, path, strerror(ERRNO));
           fclose(fp);
           fp = NULL;
           break;
+        }
+      }
   /*
    * Version (Ver):  2-bit unsigned integer.  Indicates the CoAP version
    * number.  Implementations of this specification MUST set this field
    * to 1 (01 binary).  Other values are reserved for future versions.
    * Messages with unknown version numbers MUST be silently ignored.
    */
   if (((uint8_t) *ptr >> 6) != 1) {
     cm->flags |= MG_COAP_IGNORE;
     return NULL;
+  }
     mg_close_connection(newconn);
   /*
    * Type (T):  2-bit unsigned integer.  Indicates if this message is of
    * type Confirmable (0), Non-confirmable (1), Acknowledgement (2), or
    * Reset (3).
    */
   cm->msg_type = ((uint8_t) *ptr & 0x30) >> 4;
   cm->flags |= MG_COAP_MSG_TYPE_FIELD;
   /*
    * Token Length (TKL):  4-bit unsigned integer.  Indicates the length of
    * the variable-length Token field (0-8 bytes).  Lengths 9-15 are
    * reserved, MUST NOT be sent, and MUST be processed as a message
    * format error.
    */
   cm->token.len = *ptr & 0x0F;
   if (cm->token.len > 8) {
     cm->flags |= MG_COAP_FORMAT_ERROR;
     return NULL;
+  }
   return fp;
   ptr++;
   /*
    * Code:  8-bit unsigned integer, split into a 3-bit class (most
    * significant bits) and a 5-bit detail (least significant bits)
    */
   cm->code_class = (uint8_t) *ptr >> 5;
   cm->code_detail = *ptr & 0x1F;
   cm->flags |= (MG_COAP_CODE_CLASS_FIELD | MG_COAP_CODE_DETAIL_FIELD);
   ptr++;
   /* Message ID:  16-bit unsigned integer in network byte order. */
   cm->msg_id = (uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1);
   cm->flags |= MG_COAP_MSG_ID_FIELD;
   ptr += 2;
   return ptr;
+}
 static int is_valid_uri(const char *uri) {
   // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
   // URI can be an asterisk (*) or should start with slash.
   return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
 /*
  * Fills token information in mg_coap_message.
+ *
  * Helper function.
  */
 static char *coap_get_token(char *ptr, struct mbuf *io,
                             struct mg_coap_message *cm) {
   if (cm->token.len != 0) {
     if (ptr + cm->token.len > io->buf + io->len) {
       cm->flags |= MG_COAP_NOT_ENOUGH_DATA;
       return NULL;
     } else {
       cm->token.p = ptr;
       ptr += cm->token.len;
       cm->flags |= MG_COAP_TOKEN_FIELD;
+    }
+  }
 static void process_new_connection(struct mg_connection *conn) {
   struct mg_request_info *ri = &conn->request_info;
   int keep_alive_enabled, buffered_len;
   const char *cl;
   return ptr;
+}
   keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
 /*
  * Returns Option Delta or Length.
+ *
  * Helper function.
  */
 static int coap_get_ext_opt(char *ptr, struct mbuf *io, uint16_t *opt_info) {
   int ret = 0;
   do {
     reset_per_request_attributes(conn);
     conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size,
                                      &conn->data_len);
     assert(conn->request_len < 0 || conn->data_len >= conn->request_len);
     if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
       send_http_error(conn, 413, "Request Too Large", "%s", "");
       return;
     } if (conn->request_len <= 0) {
       return;  // Remote end closed the connection
+    }
     conn->body = conn->next_request = conn->buf + conn->request_len;
     if (parse_http_request(conn->buf, conn->buf_size, ri) <= 0 ||
         !is_valid_uri(ri->uri)) {
       // Do not put garbage in the access log, just send it back to the client
       send_http_error(conn, 400, "Bad Request",
           "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
       conn->must_close = 1;
     } else if (strcmp(ri->http_version, "1.0") &&
                strcmp(ri->http_version, "1.1")) {
       // Request seems valid, but HTTP version is strange
       send_http_error(conn, 505, "HTTP version not supported", "%s", "");
       log_access(conn);
   if (*opt_info == 13) {
     /*
      * 13:  An 8-bit unsigned integer follows the initial byte and
      * indicates the Option Delta/Length minus 13.
      */
     if (ptr < io->buf + io->len) {
       *opt_info = (uint8_t) *ptr + 13;
       ret = sizeof(uint8_t);
     } else {
       // Request is valid, handle it
       cl = get_header(ri, "Content-Length");
       conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
       // Set pointer to the next buffered request
       buffered_len = conn->data_len - conn->request_len;
       assert(buffered_len >= 0);
       if (conn->content_len <= 0) {
       } else if (conn->content_len < (int64_t) buffered_len) {
         conn->next_request += conn->content_len;
       ret = -1; /* LCOV_EXCL_LINE */
+    }
   } else if (*opt_info == 14) {
     /*
      * 14:  A 16-bit unsigned integer in network byte order follows the
      * initial byte and indicates the Option Delta/Length minus 269.
      */
     if (ptr + sizeof(uint8_t) < io->buf + io->len) {
       *opt_info = ((uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1)) + 269;
       ret = sizeof(uint16_t);
     } else {
-        conn->next_request += buffered_len;
+      ret = -1; /* LCOV_EXCL_LINE */
+    }
       conn->birth_time = time(NULL);
       handle_request(conn);
       call_user(conn, MG_REQUEST_COMPLETE);
       log_access(conn);
+  }
     if (ri->remote_user != NULL) {
       free((void *) ri->remote_user);
   return ret;
+}
     // Discard all buffered data for this request
     assert(conn->next_request >= conn->buf);
     assert(conn->data_len >= conn->next_request - conn->buf);
     conn->data_len -= conn->next_request - conn->buf;
     memmove(conn->buf, conn->next_request, (size_t) conn->data_len);
   } while (conn->ctx->stop_flag == 0 &&
            keep_alive_enabled &&
            should_keep_alive(conn));
 /*
  * Fills options in mg_coap_message.
+ *
  * Helper function.
+ *
  * General options format:
  * +---------------+---------------+
  * | Option Delta  | Option Length |  1 byte
  * +---------------+---------------+
  * \    Option Delta (extended)    \  0-2 bytes
  * +-------------------------------+
  * / Option Length  (extended)     \  0-2 bytes
  * +-------------------------------+
  * \         Option Value          \  0 or more bytes
  * +-------------------------------+
  */
 static char *coap_get_options(char *ptr, struct mbuf *io,
                               struct mg_coap_message *cm) {
   uint16_t prev_opt = 0;
   if (ptr == io->buf + io->len) {
     /* end of packet, ok */
     return NULL;
+  }
 // Worker threads take accepted socket from the queue
 static int consume_socket(struct mg_context *ctx, struct socket *sp) {
   (void) pthread_mutex_lock(&ctx->mutex);
   DEBUG_TRACE(("going idle"));
   /* 0xFF is payload marker */
   while (ptr < io->buf + io->len && (uint8_t) *ptr != 0xFF) {
     uint16_t option_delta, option_lenght;
     int optinfo_len;
   // If the queue is empty, wait. We're idle at this point.
   while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
     pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
     /* Option Delta:  4-bit unsigned integer */
     option_delta = ((uint8_t) *ptr & 0xF0) >> 4;
     /* Option Length:  4-bit unsigned integer */
     option_lenght = *ptr & 0x0F;
     if (option_delta == 15 || option_lenght == 15) {
       /*
        * 15:  Reserved for future use.  If the field is set to this value,
        * it MUST be processed as a message format error
        */
       cm->flags |= MG_COAP_FORMAT_ERROR;
       break;
+    }
   // If we're stopping, sq_head may be equal to sq_tail.
   if (ctx->sq_head > ctx->sq_tail) {
     // Copy socket from the queue and increment tail
     *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
     ctx->sq_tail++;
     DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
     ptr++;
     // Wrap pointers if needed
     while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
       ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
       ctx->sq_head -= ARRAY_SIZE(ctx->queue);
+    }
     /* check for extended option delta */
     optinfo_len = coap_get_ext_opt(ptr, io, &option_delta);
     if (optinfo_len == -1) {
       cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
       break;                                /* LCOV_EXCL_LINE */
+    }
   (void) pthread_cond_signal(&ctx->sq_empty);
   (void) pthread_mutex_unlock(&ctx->mutex);
     ptr += optinfo_len;
   return !ctx->stop_flag;
     /* check or extended option lenght */
     optinfo_len = coap_get_ext_opt(ptr, io, &option_lenght);
     if (optinfo_len == -1) {
       cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
       break;                                /* LCOV_EXCL_LINE */
+    }
 static void worker_thread(struct mg_context *ctx) {
   struct mg_connection *conn;
   int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
     ptr += optinfo_len;
   conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
   if (conn == NULL) {
     cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
   } else {
     conn->buf_size = buf_size;
     conn->buf = (char *) (conn + 1);
     /*
      * Instead of specifying the Option Number directly, the instances MUST
      * appear in order of their Option Numbers and a delta encoding is used
      * between them.
      */
     option_delta += prev_opt;
     // Call consume_socket() even when ctx->stop_flag > 0, to let it signal
     // sq_empty condvar to wake up the master waiting in produce_socket()
     while (consume_socket(ctx, &conn->client)) {
       conn->birth_time = time(NULL);
       conn->ctx = ctx;
     mg_coap_add_option(cm, option_delta, ptr, option_lenght);
       // Fill in IP, port info early so even if SSL setup below fails,
       // error handler would have the corresponding info.
       // Thanks to Johannes Winkelmann for the patch.
       // TODO(lsm): Fix IPv6 case
       conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
       memcpy(&conn->request_info.remote_ip,
              &conn->client.rsa.sin.sin_addr.s_addr, 4);
       conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
       conn->request_info.is_ssl = conn->client.is_ssl;
     prev_opt = option_delta;
       if (!conn->client.is_ssl ||
           (conn->client.is_ssl &&
            sslize(conn, conn->ctx->ssl_ctx, SSL_accept))) {
         process_new_connection(conn);
     if (ptr + option_lenght > io->buf + io->len) {
       cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
       break;                                /* LCOV_EXCL_LINE */
+    }
-      close_connection(conn);
+    ptr += option_lenght;
+  }
     free(conn);
   if ((cm->flags & MG_COAP_ERROR) != 0) {
     mg_coap_free_options(cm);
     return NULL;
+  }
   // Signal master that we're done with connection and exiting
   (void) pthread_mutex_lock(&ctx->mutex);
   ctx->num_threads--;
   (void) pthread_cond_signal(&ctx->cond);
   assert(ctx->num_threads >= 0);
   (void) pthread_mutex_unlock(&ctx->mutex);
   cm->flags |= MG_COAP_OPTIOMG_FIELD;
   DEBUG_TRACE(("exiting"));
   if (ptr == io->buf + io->len) {
     /* end of packet, ok */
     return NULL;
+  }
 // Master thread adds accepted socket to a queue
 static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
   (void) pthread_mutex_lock(&ctx->mutex);
   ptr++;
   // If the queue is full, wait
   while (ctx->stop_flag == 0 &&
          ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
     (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
   return ptr;
+}
   if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
     // Copy socket to the queue and increment head
     ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
     ctx->sq_head++;
     DEBUG_TRACE(("queued socket %d", sp->sock));
+  }
 uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm) {
   char *ptr;
   memset(cm, 0, sizeof(*cm));
   (void) pthread_cond_signal(&ctx->sq_full);
   (void) pthread_mutex_unlock(&ctx->mutex);
   if ((ptr = coap_parse_header(io->buf, io, cm)) == NULL) {
     return cm->flags;
+  }
 static void accept_new_connection(const struct socket *listener,
                                   struct mg_context *ctx) {
   struct socket accepted;
   char src_addr[20];
   socklen_t len;
   int allowed;
   if ((ptr = coap_get_token(ptr, io, cm)) == NULL) {
     return cm->flags;
+  }
   len = sizeof(accepted.rsa);
   accepted.lsa = listener->lsa;
   accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len);
   if (accepted.sock != INVALID_SOCKET) {
     allowed = check_acl(ctx, &accepted.rsa);
     if (allowed) {
       // Put accepted socket structure into the queue
       DEBUG_TRACE(("accepted socket %d", accepted.sock));
       accepted.is_ssl = listener->is_ssl;
       produce_socket(ctx, &accepted);
     } else {
       sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa);
       cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
       (void) closesocket(accepted.sock);
   if ((ptr = coap_get_options(ptr, io, cm)) == NULL) {
     return cm->flags;
+  }
   /* the rest is payload */
   cm->payload.len = io->len - (ptr - io->buf);
   if (cm->payload.len != 0) {
     cm->payload.p = ptr;
     cm->flags |= MG_COAP_PAYLOAD_FIELD;
+  }
   return cm->flags;
+}
 static void master_thread(struct mg_context *ctx) {
   fd_set read_set;
   struct timeval tv;
   struct socket *sp;
   int max_fd;
 /*
  * Calculates extended size of given Opt Number/Length in coap message.
+ *
  * Helper function.
  */
 static size_t coap_get_ext_opt_size(uint32_t value) {
   int ret = 0;
   // Increase priority of the master thread
 #if defined(_WIN32)
   SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
 #endif
   if (value >= 13 && value <= 0xFF + 13) {
     ret = sizeof(uint8_t);
   } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) {
     ret = sizeof(uint16_t);
+  }
 #if defined(ISSUE_317)
   struct sched_param sched_param;
   sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
   pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
 #endif
   return ret;
+}
   while (ctx->stop_flag == 0) {
     FD_ZERO(&read_set);
     max_fd = -1;
 /*
  * Splits given Opt Number/Length into base and ext values.
+ *
  * Helper function.
  */
 static int coap_split_opt(uint32_t value, uint8_t *base, uint16_t *ext) {
   int ret = 0;
     // Add listening sockets to the read set
     for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
       add_to_set(sp->sock, &read_set, &max_fd);
   if (value < 13) {
     *base = value;
   } else if (value >= 13 && value <= 0xFF + 13) {
     *base = 13;
     *ext = value - 13;
     ret = sizeof(uint8_t);
   } else if (value > 0xFF + 13 && value <= 0xFFFF + 269) {
     *base = 14;
     *ext = value - 269;
     ret = sizeof(uint16_t);
+  }
     tv.tv_sec = 0;
     tv.tv_usec = 200 * 1000;
     if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
 #ifdef _WIN32
       // On windows, if read_set and write_set are empty,
       // select() returns "Invalid parameter" error
       // (at least on my Windows XP Pro). So in this case, we sleep here.
       mg_sleep(1000);
 #endif // _WIN32
     } else {
       for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
         if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
           accept_new_connection(sp, ctx);
   return ret;
+}
 /*
  * Puts uint16_t (in network order) into given char stream.
+ *
  * Helper function.
  */
 static char *coap_add_uint16(char *ptr, uint16_t val) {
   *ptr = val >> 8;
   ptr++;
   *ptr = val & 0x00FF;
   ptr++;
   return ptr;
+}
 /*
  * Puts extended value of Opt Number/Length into given char stream.
+ *
  * Helper function.
  */
 static char *coap_add_opt_info(char *ptr, uint16_t val, size_t len) {
   if (len == sizeof(uint8_t)) {
     *ptr = val;
     ptr++;
   } else if (len == sizeof(uint16_t)) {
     ptr = coap_add_uint16(ptr, val);
+  }
   return ptr;
+}
 /*
  * Verifies given mg_coap_message and calculates message size for it.
+ *
  * Helper function.
  */
 static uint32_t coap_calculate_packet_size(struct mg_coap_message *cm,
                                            size_t *len) {
   struct mg_coap_option *opt;
   uint32_t prev_opt_number;
   *len = 4; /* header */
   if (cm->msg_type > MG_COAP_MSG_MAX) {
     return MG_COAP_ERROR | MG_COAP_MSG_TYPE_FIELD;
+  }
   if (cm->token.len > 8) {
     return MG_COAP_ERROR | MG_COAP_TOKEN_FIELD;
+  }
   if (cm->code_class > 7) {
     return MG_COAP_ERROR | MG_COAP_CODE_CLASS_FIELD;
+  }
   if (cm->code_detail > 31) {
     return MG_COAP_ERROR | MG_COAP_CODE_DETAIL_FIELD;
+  }
   *len += cm->token.len;
   if (cm->payload.len != 0) {
     *len += cm->payload.len + 1; /* ... + 1; add payload marker */
+  }
   opt = cm->options;
   prev_opt_number = 0;
   while (opt != NULL) {
     *len += 1; /* basic delta/length */
     *len += coap_get_ext_opt_size(opt->number);
     *len += coap_get_ext_opt_size((uint32_t) opt->value.len);
     /*
      * Current implementation performs check if
      * option_number > previous option_number and produces an error
      * TODO(alashkin): write design doc with limitations
      * May be resorting is more suitable solution.
      */
     if ((opt->next != NULL && opt->number > opt->next->number) ||
         opt->value.len > 0xFFFF + 269 ||
         opt->number - prev_opt_number > 0xFFFF + 269) {
       return MG_COAP_ERROR | MG_COAP_OPTIOMG_FIELD;
+    }
     *len += opt->value.len;
     opt = opt->next;
+  }
   return 0;
+}
 uint32_t mg_coap_compose(struct mg_coap_message *cm, struct mbuf *io) {
   struct mg_coap_option *opt;
   uint32_t res, prev_opt_number;
   size_t prev_io_len, packet_size;
   char *ptr;
   res = coap_calculate_packet_size(cm, &packet_size);
   if (res != 0) {
     return res;
+  }
   DEBUG_TRACE(("stopping workers"));
   // Stop signal received: somebody called mg_stop. Quit.
   close_all_listening_sockets(ctx);
   /* saving previous lenght to handle non-empty mbuf */
   prev_io_len = io->len;
   mbuf_append(io, NULL, packet_size);
   ptr = io->buf + prev_io_len;
   // Wakeup workers that are waiting for connections to handle.
   pthread_cond_broadcast(&ctx->sq_full);
   /*
    * since cm is verified, it is possible to use bits shift operator
    * without additional zeroing of unused bits
    */
   // Wait until all threads finish
   (void) pthread_mutex_lock(&ctx->mutex);
   while (ctx->num_threads > 0) {
     (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
+  }
   (void) pthread_mutex_unlock(&ctx->mutex);
   /* ver: 2 bits, msg_type: 2 bits, toklen: 4 bits */
   *ptr = (1 << 6) | (cm->msg_type << 4) | (cm->token.len);
   ptr++;
   // All threads exited, no sync is needed. Destroy mutex and condvars
   (void) pthread_mutex_destroy(&ctx->mutex);
   (void) pthread_cond_destroy(&ctx->cond);
   (void) pthread_cond_destroy(&ctx->sq_empty);
   (void) pthread_cond_destroy(&ctx->sq_full);
   /* code class: 3 bits, code detail: 5 bits */
   *ptr = (cm->code_class << 5) | (cm->code_detail);
   ptr++;
 #if !defined(NO_SSL)
   uninitialize_ssl(ctx);
 #endif
   DEBUG_TRACE(("exiting"));
   ptr = coap_add_uint16(ptr, cm->msg_id);
   // Signal mg_stop() that we're done.
   // WARNING: This must be the very last thing this
   // thread does, as ctx becomes invalid after this line.
   ctx->stop_flag = 2;
   if (cm->token.len != 0) {
     memcpy(ptr, cm->token.p, cm->token.len);
     ptr += cm->token.len;
+  }
 static void free_context(struct mg_context *ctx) {
   int i;
   opt = cm->options;
   prev_opt_number = 0;
   while (opt != NULL) {
     uint8_t delta_base = 0, length_base = 0;
     uint16_t delta_ext, length_ext;
     size_t opt_delta_len =
         coap_split_opt(opt->number - prev_opt_number, &delta_base, &delta_ext);
     size_t opt_lenght_len =
         coap_split_opt((uint32_t) opt->value.len, &length_base, &length_ext);
     *ptr = (delta_base << 4) | length_base;
     ptr++;
     ptr = coap_add_opt_info(ptr, delta_ext, opt_delta_len);
     ptr = coap_add_opt_info(ptr, length_ext, opt_lenght_len);
   // Deallocate config parameters
   for (i = 0; i < NUM_OPTIONS; i++) {
     if (ctx->config[i] != NULL)
       free(ctx->config[i]);
     if (opt->value.len != 0) {
       memcpy(ptr, opt->value.p, opt->value.len);
       ptr += opt->value.len;
+    }
   // Deallocate SSL context
   if (ctx->ssl_ctx != NULL) {
     SSL_CTX_free(ctx->ssl_ctx);
     prev_opt_number = opt->number;
     opt = opt->next;
+  }
   if (ctx->client_ssl_ctx != NULL) {
     SSL_CTX_free(ctx->client_ssl_ctx);
   if (cm->payload.len != 0) {
     *ptr = 0xFF;
     ptr++;
     memcpy(ptr, cm->payload.p, cm->payload.len);
+  }
 #ifndef NO_SSL
   if (ssl_mutexes != NULL) {
     free(ssl_mutexes);
   return 0;
+}
 #endif // !NO_SSL
   // Deallocate context itself
   free(ctx);
 uint32_t mg_coap_send_message(struct mg_connection *nc,
                               struct mg_coap_message *cm) {
   struct mbuf packet_out;
   uint32_t compose_res;
   mbuf_init(&packet_out, 0);
   compose_res = mg_coap_compose(cm, &packet_out);
   if (compose_res != 0) {
     return compose_res; /* LCOV_EXCL_LINE */
+  }
 void mg_stop(struct mg_context *ctx) {
   ctx->stop_flag = 1;
   mg_send(nc, packet_out.buf, (int) packet_out.len);
   mbuf_free(&packet_out);
   // Wait until mg_fini() stops
   while (ctx->stop_flag != 2) {
     (void) mg_sleep(10);
   return 0;
+}
   free_context(ctx);
 #if defined(_WIN32) && !defined(__SYMBIAN32__)
   (void) WSACleanup();
 #endif // _WIN32
 uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id) {
   struct mg_coap_message cm;
   memset(&cm, 0, sizeof(cm));
   cm.msg_type = MG_COAP_MSG_ACK;
   cm.msg_id = msg_id;
   return mg_coap_send_message(nc, &cm);
+}
 struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
                             const char **options) {
   struct mg_context *ctx;
   const char *name, *value, *default_value;
   int i;
 static void coap_handler(struct mg_connection *nc, int ev, void *ev_data) {
   struct mbuf *io = &nc->recv_mbuf;
   struct mg_coap_message cm;
   uint32_t parse_res;
 #if defined(_WIN32) && !defined(__SYMBIAN32__)
   WSADATA data;
   WSAStartup(MAKEWORD(2,2), &data);
   InitializeCriticalSection(&global_log_file_lock);
 #endif // _WIN32
   memset(&cm, 0, sizeof(cm));
   // Allocate context and initialize reasonable general case defaults.
   // TODO(lsm): do proper error handling here.
   if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) {
     return NULL;
+  }
   ctx->user_callback = user_callback;
   ctx->user_data = user_data;
   nc->handler(nc, ev, ev_data);
   while (options && (name = *options++) != NULL) {
     if ((i = get_option_index(name)) == -1) {
       cry(fc(ctx), "Invalid option: %s", name);
       free_context(ctx);
       return NULL;
     } else if ((value = *options++) == NULL) {
       cry(fc(ctx), "%s: option value cannot be NULL", name);
       free_context(ctx);
       return NULL;
+    }
     if (ctx->config[i] != NULL) {
       cry(fc(ctx), "warning: %s: duplicate option", name);
+    }
     ctx->config[i] = mg_strdup(value);
     DEBUG_TRACE(("[%s] -> [%s]", name, value));
   switch (ev) {
     case MG_EV_RECV:
       parse_res = mg_coap_parse(io, &cm);
       if ((parse_res & MG_COAP_IGNORE) == 0) {
         if ((cm.flags & MG_COAP_NOT_ENOUGH_DATA) != 0) {
           /*
            * Since we support UDP only
            * MG_COAP_NOT_ENOUGH_DATA == MG_COAP_FORMAT_ERROR
            */
           cm.flags |= MG_COAP_FORMAT_ERROR; /* LCOV_EXCL_LINE */
         }                                   /* LCOV_EXCL_LINE */
         nc->handler(nc, MG_COAP_EVENT_BASE + cm.msg_type, &cm);
+      }
   // Set default value if needed
   for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
     default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
     if (ctx->config[i] == NULL && default_value != NULL) {
       ctx->config[i] = mg_strdup(default_value);
       DEBUG_TRACE(("Setting default: [%s] -> [%s]",
                    config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
                    default_value));
       mg_coap_free_options(&cm);
       mbuf_remove(io, io->len);
       break;
+  }
+}
   // NOTE(lsm): order is important here. SSL certificates must
   // be initialized before listening ports. UID must be set last.
   if (!set_gpass_option(ctx) ||
 #if !defined(NO_SSL)
       !set_ssl_option(ctx) ||
 #endif
       !set_ports_option(ctx) ||
 #if !defined(_WIN32)
       !set_uid_option(ctx) ||
 #endif
       !set_acl_option(ctx)) {
     free_context(ctx);
     return NULL;
 /*
  * Attach built-in CoAP event handler to the given connection.
+ *
  * The user-defined event handler will receive following extra events:
+ *
  * - MG_EV_COAP_CON
  * - MG_EV_COAP_NOC
  * - MG_EV_COAP_ACK
  * - MG_EV_COAP_RST
  */
 int mg_set_protocol_coap(struct mg_connection *nc) {
   /* supports UDP only */
   if ((nc->flags & MG_F_UDP) == 0) {
     return -1;
+  }
 #if !defined(_WIN32) && !defined(__SYMBIAN32__)
   // Ignore SIGPIPE signal, so if browser cancels the request, it
   // won't kill the whole process.
   (void) signal(SIGPIPE, SIG_IGN);
   // Also ignoring SIGCHLD to let the OS to reap zombies properly.
   (void) signal(SIGCHLD, SIG_IGN);
 #endif // !_WIN32
   (void) pthread_mutex_init(&ctx->mutex, NULL);
   (void) pthread_cond_init(&ctx->cond, NULL);
   (void) pthread_cond_init(&ctx->sq_empty, NULL);
   (void) pthread_cond_init(&ctx->sq_full, NULL);
   // Start master (listening) thread
   mg_start_thread((mg_thread_func_t) master_thread, ctx);
   nc->proto_handler = coap_handler;
   // Start worker threads
   for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
     if (mg_start_thread((mg_thread_func_t) worker_thread, ctx) != 0) {
       cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
     } else {
       ctx->num_threads++;
+    }
   return 0;
+}
   return ctx;
+}
 #endif /* MG_DISABLE_COAP */

spectrum_manager/src/mongoose.h

➞

Show inline comments

 // Copyright (c) 2004-2012 Sergey Lyubka
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 #ifndef MONGOOSE_HEADER_INCLUDED
 #define  MONGOOSE_HEADER_INCLUDED
 #ifdef __AVR__
 #include "avrsupport.h"
 #endif
 /*
  * Copyright (c) 2004-2013 Sergey Lyubka
  * Copyright (c) 2013-2015 Cesanta Software Limited
  * All rights reserved
+ *
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 #include <stdio.h>
 #define MG_VERSION "6.1"
 /* Local tweaks, applied before any of Mongoose's own headers. */
 #ifdef MG_LOCALS
 #include <mg_locals.h>
 #endif
 #if defined(MG_ENABLE_DEBUG) && !defined(CS_ENABLE_DEBUG)
 #define CS_ENABLE_DEBUG
 #endif
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef OSDEP_HEADER_INCLUDED
 #define OSDEP_HEADER_INCLUDED
 #if !defined(MG_DISABLE_FILESYSTEM) && defined(AVR_NOFS)
 #define MG_DISABLE_FILESYSTEM
 #endif
 #undef UNICODE                /* Use ANSI WinAPI functions */
 #undef _UNICODE               /* Use multibyte encoding on Windows */
 #define _MBCS                 /* Use multibyte encoding on Windows */
 #define _INTEGRAL_MAX_BITS 64 /* Enable _stati64() on Windows */
 #ifndef _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005+ */
 #endif
 #undef WIN32_LEAN_AND_MEAN /* Let windows.h always include winsock2.h */
 #undef _XOPEN_SOURCE
 #define _XOPEN_SOURCE 600    /* For flockfile() on Linux */
 #define __STDC_FORMAT_MACROS /* <inttypes.h> wants this for C++ */
 #define __STDC_LIMIT_MACROS  /* C++ wants that for INT64_MAX */
 #ifndef _LARGEFILE_SOURCE
 #define _LARGEFILE_SOURCE /* Enable fseeko() and ftello() functions */
 #endif
 #define _FILE_OFFSET_BITS 64 /* Enable 64-bit file offsets */
 #if !(defined(AVR_LIBC) || defined(PICOTCP))
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <time.h>
 #include <signal.h>
 #endif
 #ifndef BYTE_ORDER
 #define LITTLE_ENDIAN 0x41424344
 #define BIG_ENDIAN 0x44434241
 #define PDP_ENDIAN 0x42414443
 /* TODO(lsm): fix for big-endian machines. 'ABCD' is not portable */
 /*#define BYTE_ORDER 'ABCD'*/
 #define BYTE_ORDER LITTLE_ENDIAN
 #endif
 /*
  * MSVC++ 14.0 _MSC_VER == 1900 (Visual Studio 2015)
  * MSVC++ 12.0 _MSC_VER == 1800 (Visual Studio 2013)
  * MSVC++ 11.0 _MSC_VER == 1700 (Visual Studio 2012)
  * MSVC++ 10.0 _MSC_VER == 1600 (Visual Studio 2010)
  * MSVC++ 9.0  _MSC_VER == 1500 (Visual Studio 2008)
  * MSVC++ 8.0  _MSC_VER == 1400 (Visual Studio 2005)
  * MSVC++ 7.1  _MSC_VER == 1310 (Visual Studio 2003)
  * MSVC++ 7.0  _MSC_VER == 1300
  * MSVC++ 6.0  _MSC_VER == 1200
  * MSVC++ 5.0  _MSC_VER == 1100
  */
 #ifdef _MSC_VER
 #pragma warning(disable : 4127) /* FD_SET() emits warning, disable it */
 #pragma warning(disable : 4204) /* missing c99 support */
 #endif
 #ifdef PICOTCP
 #define time(x) PICO_TIME()
 #ifndef SOMAXCONN
 #define SOMAXCONN (16)
 #endif
 #ifdef _POSIX_VERSION
 #define signal(...)
 #endif
 #endif
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifndef va_copy
 #ifdef __va_copy
 #define va_copy __va_copy
 #else
 #define va_copy(x, y) (x) = (y)
 #endif
 #endif
 #ifdef _WIN32
 #define random() rand()
 #ifdef _MSC_VER
 #pragma comment(lib, "ws2_32.lib") /* Linking with winsock library */
 #endif
 #include <windows.h>
 #include <process.h>
 #ifndef EINPROGRESS
 #define EINPROGRESS WSAEINPROGRESS
 #endif
 #ifndef EWOULDBLOCK
 #define EWOULDBLOCK WSAEWOULDBLOCK
 #endif
 #ifndef __func__
 #define STRX(x) #x
 #define STR(x) STRX(x)
 #define __func__ __FILE__ ":" STR(__LINE__)
 #endif
 #define snprintf _snprintf
 #define fileno _fileno
 #define vsnprintf _vsnprintf
 #define sleep(x) Sleep((x) *1000)
 #define to64(x) _atoi64(x)
 #define popen(x, y) _popen((x), (y))
 #define pclose(x) _pclose(x)
 #if defined(_MSC_VER) && _MSC_VER >= 1400
 #define fseeko(x, y, z) _fseeki64((x), (y), (z))
 #else
 #define fseeko(x, y, z) fseek((x), (y), (z))
 #endif
 #define random() rand()
 typedef int socklen_t;
 typedef signed char int8_t;
 typedef unsigned char uint8_t;
 typedef int int32_t;
 typedef unsigned int uint32_t;
 typedef short int16_t;
 typedef unsigned short uint16_t;
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
 typedef SOCKET sock_t;
 typedef uint32_t in_addr_t;
 #ifndef UINT16_MAX
 #define UINT16_MAX 65535
 #endif
 #ifndef UINT32_MAX
 #define UINT32_MAX 4294967295
 #endif
 #ifndef pid_t
 #define pid_t HANDLE
 #endif
 #define INT64_FMT "I64d"
 #define SIZE_T_FMT "Iu"
 #ifdef __MINGW32__
 typedef struct stat cs_stat_t;
 #else
 typedef struct _stati64 cs_stat_t;
 #endif
 #ifndef S_ISDIR
 #define S_ISDIR(x) ((x) &_S_IFDIR)
 #endif
 #define DIRSEP '\\'
 /* POSIX opendir/closedir/readdir API for Windows. */
 struct dirent {
   char d_name[MAX_PATH];
 };
 typedef struct DIR {
   HANDLE handle;
   WIN32_FIND_DATAW info;
   struct dirent result;
 } DIR;
 DIR *opendir(const char *name);
 int closedir(DIR *dir);
 struct dirent *readdir(DIR *dir);
 #elif /* not _WIN32 */ defined(MG_CC3200)
 #include <fcntl.h>
 #include <unistd.h>
 #include <cc3200_libc.h>
 #include <cc3200_socket.h>
 #elif /* not CC3200 */ defined(MG_LWIP)
 #include <lwip/sockets.h>
 #include <lwip/netdb.h>
 #include <lwip/dns.h>
 #if defined(MG_ESP8266) && defined(RTOS_SDK)
 #include <esp_libc.h>
 #define random() os_random()
 #endif
 /* TODO(alashkin): check if zero is OK */
 #define SOMAXCONN 0
 #include <stdlib.h>
 #elif /* not ESP8266 RTOS */ !defined(NO_LIBC) && !defined(NO_BSD_SOCKETS)
 #include <dirent.h>
 #include <fcntl.h>
 #include <netdb.h>
 #include <pthread.h>
 #include <unistd.h>
 #include <arpa/inet.h> /* For inet_pton() when MG_ENABLE_IPV6 is defined */
 #include <netinet/in.h>
 #include <sys/socket.h>
 #include <sys/select.h>
 #endif
 #ifndef LWIP_PROVIDE_ERRNO
 #include <errno.h>
 #endif
 #ifndef _WIN32
 #include <inttypes.h>
 #include <stdarg.h>
 #ifndef AVR_LIBC
 #ifndef MG_ESP8266
 #define closesocket(x) close(x)
 #endif
 #ifndef __cdecl
 #define __cdecl
 #endif
 #define INVALID_SOCKET (-1)
 #define INT64_FMT PRId64
 #if defined(ESP8266) || defined(MG_ESP8266) || defined(MG_CC3200)
 #define SIZE_T_FMT "u"
 #else
 #define SIZE_T_FMT "zu"
 #endif
 #define to64(x) strtoll(x, NULL, 10)
 typedef int sock_t;
 typedef struct stat cs_stat_t;
 #define DIRSEP '/'
 #endif /* !AVR_LIBC */
 #ifdef __APPLE__
 int64_t strtoll(const char *str, char **endptr, int base);
 #endif
 #endif /* !_WIN32 */
 #ifndef ARRAY_SIZE
 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
 #endif
 #endif /* OSDEP_HEADER_INCLUDED */
 #ifndef _CS_DBG_H_
 #define _CS_DBG_H_
 enum cs_log_level {
   LL_NONE = -1,
   LL_ERROR = 0,
   LL_WARN = 1,
   LL_INFO = 2,
   LL_DEBUG = 3,
   LL_VERBOSE_DEBUG = 4,
   _LL_MIN = -2,
   _LL_MAX = 5,
 };
 #ifndef CS_NDEBUG
 extern enum cs_log_level s_cs_log_level;
 void cs_log_set_level(enum cs_log_level level);
 void cs_log_printf(const char *fmt, ...);
 #define LOG(l, x)                        \
   if (s_cs_log_level >= l) {             \
     fprintf(stderr, "%-20s ", __func__); \
     cs_log_printf x;                     \
+  }
 #define DBG(x)                              \
   if (s_cs_log_level >= LL_VERBOSE_DEBUG) { \
     fprintf(stderr, "%-20s ", __func__);    \
     cs_log_printf x;                        \
+  }
 #else /* NDEBUG */
 #define cs_log_set_level(l)
 #define LOG(l, x)
 #define DBG(x)
 #endif
 #endif /* _CS_DBG_H_ */
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === Memory Buffers
+ *
  * Mbufs are mutable/growing memory buffers, like C++ strings.
  * Mbuf can append data to the end of a buffer, or insert data into arbitrary
  * position in the middle of a buffer. The buffer grows automatically when
  * needed.
  */
 #ifndef MBUF_H_INCLUDED
 #define MBUF_H_INCLUDED
 #if defined(__cplusplus)
 extern "C" {
 #endif
 #include <stdlib.h>
 #ifndef MBUF_SIZE_MULTIPLIER
 #define MBUF_SIZE_MULTIPLIER 1.5
 #endif
 /* Memory buffer descriptor */
 struct mbuf {
   char *buf;   /* Buffer pointer */
   size_t len;  /* Data length. Data is located between offset 0 and len. */
   size_t size; /* Buffer size allocated by realloc(1). Must be >= len */
 };
 /*
  * Initialize an Mbuf.
  * `initial_capacity` specifies the initial capacity of the mbuf.
  */
 void mbuf_init(struct mbuf *, size_t initial_capacity);
 /* Free the space allocated for the mbuffer and resets the mbuf structure. */
 void mbuf_free(struct mbuf *);
 /*
  * Appends data to the Mbuf.
+ *
  * Return the number of bytes appended, or 0 if out of memory.
  */
 size_t mbuf_append(struct mbuf *, const void *data, size_t data_size);
 /*
  * Insert data at a specified offset in the Mbuf.
+ *
  * Existing data will be shifted forwards and the buffer will
  * be grown if necessary.
  * Return the number of bytes inserted.
  */
 size_t mbuf_insert(struct mbuf *, size_t, const void *, size_t);
 /* Remove `data_size` bytes from the beginning of the buffer. */
 void mbuf_remove(struct mbuf *, size_t data_size);
 /*
  * Resize an Mbuf.
+ *
  * If `new_size` is smaller than buffer's `len`, the
  * resize is not performed.
  */
 void mbuf_resize(struct mbuf *, size_t new_size);
 /* Shrink an Mbuf by resizing its `size` to `len`. */
 void mbuf_trim(struct mbuf *);
 #if defined(__cplusplus)
+}
 #endif /* __cplusplus */
 #endif /* MBUF_H_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #if !defined(MG_SHA1_HEADER_INCLUDED) && !defined(DISABLE_SHA1)
 #define MG_SHA1_HEADER_INCLUDED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 typedef struct {
   uint32_t state[5];
   uint32_t count[2];
   unsigned char buffer[64];
 } cs_sha1_ctx;
 void cs_sha1_init(cs_sha1_ctx *);
 void cs_sha1_update(cs_sha1_ctx *, const unsigned char *data, uint32_t len);
 void cs_sha1_final(unsigned char digest[20], cs_sha1_ctx *);
 void cs_hmac_sha1(const unsigned char *key, size_t key_len,
                   const unsigned char *text, size_t text_len,
                   unsigned char out[20]);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_SHA1_HEADER_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef MD5_HEADER_DEFINED
 #define MD5_HEADER_DEFINED
 #ifdef __cplusplus
 extern "C" {
 #endif // __cplusplus
 struct mg_context;     // Handle for the HTTP service itself
 struct mg_connection;  // Handle for the individual connection
 // This structure contains information about the HTTP request.
 struct mg_request_info {
   void *user_data;       // User-defined pointer passed to mg_start()
   char *request_method;  // "GET", "POST", etc
   char *uri;             // URL-decoded URI
   char *http_version;    // E.g. "1.0", "1.1"
   char *query_string;    // URL part after '?' (not including '?') or NULL
   char *remote_user;     // Authenticated user, or NULL if no auth used
   char *log_message;     // Mongoose error log message, MG_EVENT_LOG only
   long remote_ip;        // Client's IP address
   int remote_port;       // Client's port
   int status_code;       // HTTP reply status code, e.g. 200
   int is_ssl;            // 1 if SSL-ed, 0 if not
   int num_headers;       // Number of headers
   struct mg_header {
     char *name;          // HTTP header name
     char *value;         // HTTP header value
   } http_headers[64];    // Maximum 64 headers
 #endif /* __cplusplus */
 typedef struct MD5Context {
   uint32_t buf[4];
   uint32_t bits[2];
   unsigned char in[64];
 } MD5_CTX;
 void MD5_Init(MD5_CTX *c);
 void MD5_Update(MD5_CTX *c, const unsigned char *data, size_t len);
 void MD5_Final(unsigned char *md, MD5_CTX *c);
 /*
  * Return stringified MD5 hash for NULL terminated list of strings.
  * Example:
+ *
  *    char buf[33];
  *    cs_md5(buf, "foo", "bar", NULL);
  */
 char *cs_md5(char buf[33], ...);
 /*
  * Stringify binary data. Output buffer size must be 2 * size_of_input + 1
  * because each byte of input takes 2 bytes in string representation
  * plus 1 byte for the terminating \0 character.
  */
 void cs_to_hex(char *to, const unsigned char *p, size_t len);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 #if !defined(BASE64_H_INCLUDED) && !defined(DISABLE_BASE64)
 #define BASE64_H_INCLUDED
 #include <stdio.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
 typedef void (*cs_base64_putc_t)(char, void *);
 struct cs_base64_ctx {
   /* cannot call it putc because it's a macro on some environments */
   cs_base64_putc_t b64_putc;
   unsigned char chunk[3];
   int chunk_size;
   void *user_data;
 };
 // Various events on which user-defined function is called by Mongoose.
 enum mg_event {
   MG_NEW_REQUEST,       // New HTTP request has arrived from the client
   MG_REQUEST_COMPLETE,  // Mongoose has finished handling the request
   MG_HTTP_ERROR,        // HTTP error must be returned to the client
   MG_EVENT_LOG,         // Mongoose logs an event, request_info.log_message
   MG_INIT_SSL           // Mongoose initializes SSL. Instead of mg_connection *,
                         // SSL context is passed to the callback function.
 void cs_base64_init(struct cs_base64_ctx *ctx, cs_base64_putc_t putc,
                     void *user_data);
 void cs_base64_update(struct cs_base64_ctx *ctx, const char *str, size_t len);
 void cs_base64_finish(struct cs_base64_ctx *ctx);
 void cs_base64_encode(const unsigned char *src, int src_len, char *dst);
 void cs_fprint_base64(FILE *f, const unsigned char *src, int src_len);
 int cs_base64_decode(const unsigned char *s, int len, char *dst);
 #ifdef __cplusplus
+}
 #endif
 #endif
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  */
 #ifndef STR_UTIL_H
 #define STR_UTIL_H
 #include <stdarg.h>
 #include <stdlib.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
 int c_snprintf(char *buf, size_t buf_size, const char *format, ...);
 int c_vsnprintf(char *buf, size_t buf_size, const char *format, va_list ap);
 #if (!(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 700) &&           \
      !(defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200809L) &&   \
      !(defined(__DARWIN_C_LEVEL) && __DARWIN_C_LEVEL >= 200809L) && \
      !defined(RTOS_SDK)) ||                                         \
     defined(_WIN32)
 #define _MG_PROVIDE_STRNLEN
 size_t strnlen(const char *s, size_t maxlen);
 #endif
 #ifdef __cplusplus
+}
 #endif
 #endif
 /*
  * Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
  * Copyright (c) 2013 Cesanta Software Limited
  * All rights reserved
+ *
  * This library is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http: *www.gnu.org/licenses/>.
+ *
  * You are free to use this library under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this library under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 #ifndef FROZEN_HEADER_INCLUDED
 #define FROZEN_HEADER_INCLUDED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #include <stdarg.h>
 enum json_type {
   JSON_TYPE_EOF     = 0,      /* End of parsed tokens marker */
   JSON_TYPE_STRING  = 1,
   JSON_TYPE_NUMBER  = 2,
   JSON_TYPE_OBJECT  = 3,
   JSON_TYPE_TRUE    = 4,
   JSON_TYPE_FALSE   = 5,
   JSON_TYPE_NULL    = 6,
   JSON_TYPE_ARRAY   = 7
 };
 struct json_token {
   const char *ptr;      /* Points to the beginning of the token */
   int len;              /* Token length */
   int num_desc;         /* For arrays and object, total number of descendants */
   enum json_type type;  /* Type of the token, possible values above */
 };
 // Prototype for the user-defined function. Mongoose calls this function
 // on every MG_* event.
 //
 // Parameters:
 //   event: which event has been triggered.
 //   conn: opaque connection handler. Could be used to read, write data to the
 //         client, etc. See functions below that have "mg_connection *" arg.
 //
 // Return:
 //   If handler returns non-NULL, that means that handler has processed the
 //   request by sending appropriate HTTP reply to the client. Mongoose treats
 //   the request as served.
 //   If handler returns NULL, that means that handler has not processed
 //   the request. Handler must not send any data to the client in this case.
 //   Mongoose proceeds with request handling as if nothing happened.
 typedef void * (*mg_callback_t)(enum mg_event event,
                                 struct mg_connection *conn);
 // Start web server.
 //
 // Parameters:
 //   callback: user defined event handling function or NULL.
 //   options: NULL terminated list of option_name, option_value pairs that
 //            specify Mongoose configuration parameters.
 //
 // Side-effects: on UNIX, ignores SIGCHLD and SIGPIPE signals. If custom
 //    processing is required for these, signal handlers must be set up
 //    after calling mg_start().
 //
 //
 // Example:
 //   const char *options[] = {
 //     "document_root", "/var/www",
 //     "listening_ports", "80,443s",
 //     NULL
 //   };
 //   struct mg_context *ctx = mg_start(&my_func, NULL, options);
 //
 // Please refer to http://code.google.com/p/mongoose/wiki/MongooseManual
 // for the list of valid option and their possible values.
 //
 // Return:
 //   web server context, or NULL on error.
 struct mg_context *mg_start(mg_callback_t callback, void *user_data,
                             const char **options);
 // Stop the web server.
 //
 // Must be called last, when an application wants to stop the web server and
 // release all associated resources. This function blocks until all Mongoose
 // threads are stopped. Context pointer becomes invalid.
 void mg_stop(struct mg_context *);
 // Get the value of particular configuration parameter.
 // The value returned is read-only. Mongoose does not allow changing
 // configuration at run time.
 // If given parameter name is not valid, NULL is returned. For valid
 // names, return value is guaranteed to be non-NULL. If parameter is not
 // set, zero-length string is returned.
 const char *mg_get_option(const struct mg_context *ctx, const char *name);
 // Return array of strings that represent valid configuration options.
 // For each option, a short name, long name, and default value is returned.
 // Array is NULL terminated.
 const char **mg_get_valid_option_names(void);
 // Add, edit or delete the entry in the passwords file.
 //
 // This function allows an application to manipulate .htpasswd files on the
 // fly by adding, deleting and changing user records. This is one of the
 // several ways of implementing authentication on the server side. For another,
 // cookie-based way please refer to the examples/chat.c in the source tree.
 //
 // If password is not NULL, entry is added (or modified if already exists).
 // If password is NULL, entry is deleted.
 //
 // Return:
 //   1 on success, 0 on error.
 int mg_modify_passwords_file(const char *passwords_file_name,
                              const char *domain,
                              const char *user,
                              const char *password);
 // Return mg_request_info structure associated with the request.
 // Always succeeds.
 const struct mg_request_info *mg_get_request_info(const struct mg_connection *);
 // Send data to the client.
 // Return:
 //  0   when the connection has been closed
 //  -1  on error
 //  number of bytes written on success
 int mg_write(struct mg_connection *, const void *buf, size_t len);
 // Send data to the browser using printf() semantics.
 //
 // Works exactly like mg_write(), but allows to do message formatting.
 // Below are the macros for enabling compiler-specific checks for
 // printf-like arguments.
 #undef PRINTF_FORMAT_STRING
 #if _MSC_VER >= 1400
 #include <sal.h>
 #if _MSC_VER > 1400
 #define PRINTF_FORMAT_STRING(s) _Printf_format_string_ s
 /* Error codes */
 #define JSON_STRING_INVALID           -1
 #define JSON_STRING_INCOMPLETE        -2
 #define JSON_TOKEN_ARRAY_TOO_SMALL    -3
 int parse_json(const char *json_string, int json_string_length,
                struct json_token *tokens_array, int size_of_tokens_array);
 struct json_token *parse_json2(const char *json_string, int string_length);
 struct json_token *find_json_token(struct json_token *toks, const char *path);
 int json_emit_long(char *buf, int buf_len, long value);
 int json_emit_double(char *buf, int buf_len, double value);
 int json_emit_quoted_str(char *buf, int buf_len, const char *str, int len);
 int json_emit_unquoted_str(char *buf, int buf_len, const char *str, int len);
 int json_emit(char *buf, int buf_len, const char *fmt, ...);
 int json_emit_va(char *buf, int buf_len, const char *fmt, va_list);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* FROZEN_HEADER_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /*
  * === Core: TCP/UDP/SSL
+ *
  * NOTE: Mongoose manager is single threaded. It does not protect
  * its data structures by mutexes, therefore all functions that are dealing
  * with particular event manager should be called from the same thread,
  * with exception of `mg_broadcast()` function. It is fine to have different
  * event managers handled by different threads.
  */
 #ifndef MG_NET_HEADER_INCLUDED
 #define MG_NET_HEADER_INCLUDED
 #ifdef MG_ENABLE_JAVASCRIPT
 #define EXCLUDE_COMMON
 #include <v7.h>
 #endif
 #ifdef MG_ENABLE_SSL
 #ifdef __APPLE__
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
 #include <openssl/ssl.h>
 #else
 #define PRINTF_FORMAT_STRING(s) __format_string s
 typedef void *SSL;
 typedef void *SSL_CTX;
 #endif
 #ifdef MG_USE_READ_WRITE
 #define MG_RECV_FUNC(s, b, l, f) read(s, b, l)
 #define MG_SEND_FUNC(s, b, l, f) write(s, b, l)
 #else
 #define PRINTF_FORMAT_STRING(s) s
 #define MG_RECV_FUNC(s, b, l, f) recv(s, b, l, f)
 #define MG_SEND_FUNC(s, b, l, f) send(s, b, l, f)
 #endif
 #ifdef __GNUC__
 #define PRINTF_ARGS(x, y) __attribute__((format(printf, x, y)))
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 union socket_address {
   struct sockaddr sa;
   struct sockaddr_in sin;
 #ifdef MG_ENABLE_IPV6
   struct sockaddr_in6 sin6;
 #else
 #define PRINTF_ARGS(x, y)
   struct sockaddr sin6;
 #endif
 };
 /* Describes chunk of memory */
 struct mg_str {
   const char *p; /* Memory chunk pointer */
   size_t len;    /* Memory chunk length */
 };
 #define MG_STR(str_literal) \
   { str_literal, sizeof(str_literal) - 1 }
 /*
  * Callback function (event handler) prototype, must be defined by user.
  * Mongoose calls event handler, passing events defined below.
  */
 struct mg_connection;
 typedef void (*mg_event_handler_t)(struct mg_connection *, int ev, void *);
 /* Events. Meaning of event parameter (evp) is given in the comment. */
 #define MG_EV_POLL 0    /* Sent to each connection on each mg_mgr_poll() call */
 #define MG_EV_ACCEPT 1  /* New connection accepted. union socket_address * */
 #define MG_EV_CONNECT 2 /* connect() succeeded or failed. int *  */
 #define MG_EV_RECV 3    /* Data has benn received. int *num_bytes */
 #define MG_EV_SEND 4    /* Data has been written to a socket. int *num_bytes */
 #define MG_EV_CLOSE 5   /* Connection is closed. NULL */
 /*
  * Mongoose event manager.
  */
 struct mg_mgr {
   struct mg_connection *active_connections;
   const char *hexdump_file; /* Debug hexdump file path */
   sock_t ctl[2];            /* Socketpair for mg_wakeup() */
   void *user_data;          /* User data */
   void *mgr_data;           /* Implementation-specific event manager's data. */
 #ifdef MG_ENABLE_JAVASCRIPT
   struct v7 *v7;
 #endif
 };
 /*
  * Mongoose connection.
  */
 struct mg_connection {
   struct mg_connection *next, *prev; /* mg_mgr::active_connections linkage */
   struct mg_connection *listener;    /* Set only for accept()-ed connections */
   struct mg_mgr *mgr;                /* Pointer to containing manager */
   sock_t sock; /* Socket to the remote peer */
   int err;
   union socket_address sa; /* Remote peer address */
   size_t recv_mbuf_limit;  /* Max size of recv buffer */
   struct mbuf recv_mbuf;   /* Received data */
   struct mbuf send_mbuf;   /* Data scheduled for sending */
   SSL *ssl;
   SSL_CTX *ssl_ctx;
   time_t last_io_time;              /* Timestamp of the last socket IO */
   mg_event_handler_t proto_handler; /* Protocol-specific event handler */
   void *proto_data;                 /* Protocol-specific data */
   mg_event_handler_t handler;       /* Event handler function */
   void *user_data;                  /* User-specific data */
   void *priv_1;                     /* Used by mg_enable_multithreading() */
   void *priv_2;                     /* Used by mg_enable_multithreading() */
   void *mgr_data; /* Implementation-specific event manager's data. */
   unsigned long flags;
 /* Flags set by Mongoose */
 #define MG_F_LISTENING (1 << 0)          /* This connection is listening */
 #define MG_F_UDP (1 << 1)                /* This connection is UDP */
 #define MG_F_RESOLVING (1 << 2)          /* Waiting for async resolver */
 #define MG_F_CONNECTING (1 << 3)         /* connect() call in progress */
 #define MG_F_SSL_HANDSHAKE_DONE (1 << 4) /* SSL specific */
 #define MG_F_WANT_READ (1 << 5)          /* SSL specific */
 #define MG_F_WANT_WRITE (1 << 6)         /* SSL specific */
 #define MG_F_IS_WEBSOCKET (1 << 7)       /* Websocket specific */
 /* Flags that are settable by user */
 #define MG_F_SEND_AND_CLOSE (1 << 10)      /* Push remaining data and close  */
 #define MG_F_CLOSE_IMMEDIATELY (1 << 11)   /* Disconnect */
 #define MG_F_WEBSOCKET_NO_DEFRAG (1 << 12) /* Websocket specific */
 #define MG_F_DELETE_CHUNK (1 << 13)        /* HTTP specific */
 int mg_printf(struct mg_connection *,
               PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3);
 // Send contents of the entire file together with HTTP headers.
 void mg_send_file(struct mg_connection *conn, const char *path);
 #define MG_F_USER_1 (1 << 20) /* Flags left for application */
 #define MG_F_USER_2 (1 << 21)
 #define MG_F_USER_3 (1 << 22)
 #define MG_F_USER_4 (1 << 23)
 #define MG_F_USER_5 (1 << 24)
 #define MG_F_USER_6 (1 << 25)
 };
 /*
  * Initialize Mongoose manager. Side effect: ignores SIGPIPE signal.
  * `mgr->user_data` field will be initialized with `user_data` parameter.
  * That is an arbitrary pointer, where user code can associate some data
  * with the particular Mongoose manager. For example, a C++ wrapper class
  * could be written, in which case `user_data` can hold a pointer to the
  * class instance.
  */
 void mg_mgr_init(struct mg_mgr *mgr, void *user_data);
 // Read data from the remote end, return number of bytes read.
 int mg_read(struct mg_connection *, void *buf, size_t len);
 /*
  * De-initializes Mongoose manager.
+ *
  * Close and deallocate all active connections.
  */
 void mg_mgr_free(struct mg_mgr *);
 /*
  * This function performs the actual IO, and must be called in a loop
  * (an event loop). Returns the current timestamp.
  * `milli` is the maximum number of milliseconds to sleep.
  * `mg_mgr_poll()` checks all connection for IO readiness. If at least one
  * of the connections is IO-ready, `mg_mgr_poll()` triggers respective
  * event handlers and returns.
  */
 time_t mg_mgr_poll(struct mg_mgr *, int milli);
 // Get the value of particular HTTP header.
 //
 // This is a helper function. It traverses request_info->http_headers array,
 // and if the header is present in the array, returns its value. If it is
 // not present, NULL is returned.
 const char *mg_get_header(const struct mg_connection *, const char *name);
 #ifndef MG_DISABLE_SOCKETPAIR
 /*
  * Pass a message of a given length to all connections.
+ *
  * Must be called from a thread that does NOT call `mg_mgr_poll()`.
  * Note that `mg_broadcast()` is the only function
  * that can be, and must be, called from a different (non-IO) thread.
+ *
  * `func` callback function will be called by the IO thread for each
  * connection. When called, event would be `MG_EV_POLL`, and message will
  * be passed as `ev_data` pointer. Maximum message size is capped
  * by `MG_CTL_MSG_MESSAGE_SIZE` which is set to 8192 bytes.
  */
 void mg_broadcast(struct mg_mgr *, mg_event_handler_t func, void *, size_t);
 #endif
 /*
  * Iterate over all active connections.
+ *
  * Returns next connection from the list
  * of active connections, or `NULL` if there is no more connections. Below
  * is the iteration idiom:
+ *
  * [source,c]
  * ----
  * for (c = mg_next(srv, NULL); c != NULL; c = mg_next(srv, c)) {
  *   // Do something with connection `c`
  * }
  * ----
  */
 struct mg_connection *mg_next(struct mg_mgr *, struct mg_connection *);
 // Get a value of particular form variable.
 //
 // Parameters:
 //   data: pointer to form-uri-encoded buffer. This could be either POST data,
 //         or request_info.query_string.
 //   data_len: length of the encoded data.
 //   var_name: variable name to decode from the buffer
 //   buf: destination buffer for the decoded variable
 //   buf_len: length of the destination buffer
 //
 // Return:
 //   On success, length of the decoded variable.
 //   On error:
 //      -1 (variable not found, or destination buffer is too small).
 //      -2 (destination buffer is NULL or zero length).
 //
 // Destination buffer is guaranteed to be '\0' - terminated if it is not
 // NULL or zero length. In case of failure, dst[0] == '\0'.
 int mg_get_var(const char *data, size_t data_len,
                const char *var_name, char *buf, size_t buf_len);
 /*
  * Optional parameters to mg_add_sock_opt()
  * `flags` is an initial `struct mg_connection::flags` bitmask to set,
  * see `MG_F_*` flags definitions.
  */
 struct mg_add_sock_opts {
   void *user_data;           /* Initial value for connection's user_data */
   unsigned int flags;        /* Initial connection flags */
   const char **error_string; /* Placeholder for the error string */
 };
 // Fetch value of certain cookie variable into the destination buffer.
 //
 // Destination buffer is guaranteed to be '\0' - terminated. In case of
 // failure, dst[0] == '\0'. Note that RFC allows many occurrences of the same
 // parameter. This function returns only first occurrence.
 //
 // Return:
 //   On success, value length.
 //   On error, -1 (either "Cookie:" header is not present at all, or the
 //   requested parameter is not found, or destination buffer is too small
 //   to hold the value).
 int mg_get_cookie(const struct mg_connection *,
                   const char *cookie_name, char *buf, size_t buf_len);
 /*
  * Create a connection, associate it with the given socket and event handler,
  * and add it to the manager.
+ *
  * For more options see the `mg_add_sock_opt` variant.
  */
 struct mg_connection *mg_add_sock(struct mg_mgr *, sock_t, mg_event_handler_t);
 /*
  * Create a connection, associate it with the given socket and event handler,
  * and add to the manager.
+ *
  * See the `mg_add_sock_opts` structure for a description of the options.
  */
 struct mg_connection *mg_add_sock_opt(struct mg_mgr *, sock_t,
                                       mg_event_handler_t,
                                       struct mg_add_sock_opts);
 // Connect to the remote web server.
 // Return:
 //   On success, valid pointer to the new connection
 //   On error, NULL
 struct mg_connection *mg_connect(struct mg_context *ctx,
                                  const char *host, int port, int use_ssl);
 /*
  * Optional parameters to mg_bind_opt()
  * `flags` is an initial `struct mg_connection::flags` bitmask to set,
  * see `MG_F_*` flags definitions.
  */
 struct mg_bind_opts {
   void *user_data;           /* Initial value for connection's user_data */
   unsigned int flags;        /* Extra connection flags */
   const char **error_string; /* Placeholder for the error string */
 };
 /*
  * Create listening connection.
+ *
  * See `mg_bind_opt` for full documentation.
  */
 struct mg_connection *mg_bind(struct mg_mgr *, const char *,
                               mg_event_handler_t);
 /*
  * Create listening connection.
+ *
  * `address` parameter tells which address to bind to. It's format is the same
  * as for the `mg_connect()` call, where `HOST` part is optional. `address`
  * can be just a port number, e.g. `:8000`. To bind to a specific interface,
  * an IP address can be specified, e.g. `1.2.3.4:8000`. By default, a TCP
  * connection is created. To create UDP connection, prepend `udp://` prefix,
  * e.g. `udp://:8000`. To summarize, `address` paramer has following format:
  * `[PROTO://][IP_ADDRESS]:PORT`, where `PROTO` could be `tcp` or `udp`.
+ *
  * See the `mg_bind_opts` structure for a description of the optional
  * parameters.
+ *
  * Return a new listening connection, or `NULL` on error.
  * NOTE: Connection remains owned by the manager, do not free().
  */
 struct mg_connection *mg_bind_opt(struct mg_mgr *, const char *,
                                   mg_event_handler_t, struct mg_bind_opts);
 // Close the connection opened by mg_connect().
 void mg_close_connection(struct mg_connection *conn);
 /* Optional parameters to mg_connect_opt() */
 struct mg_connect_opts {
   void *user_data;           /* Initial value for connection's user_data */
   unsigned int flags;        /* Extra connection flags */
   const char **error_string; /* Placeholder for the error string */
 };
 /*
  * Connect to a remote host.
+ *
  * See `mg_connect_opt()` for full documentation.
  */
 struct mg_connection *mg_connect(struct mg_mgr *, const char *,
                                  mg_event_handler_t);
 // Download given URL to a given file.
 //   url: URL to download
 //   path: file name where to save the data
 //   request_info: pointer to a structure that will hold parsed reply headers
 //   buf, bul_len: a buffer for the reply headers
 // Return:
 //   On error, NULL
 //   On success, opened file stream to the downloaded contents. The stream
 //   is positioned to the end of the file. It is the user's responsibility
 //   to fclose() the opened file stream.
 FILE *mg_fetch(struct mg_context *ctx, const char *url, const char *path,
                char *buf, size_t buf_len, struct mg_request_info *request_info);
 /*
  * Connect to a remote host.
+ *
  * `address` format is `[PROTO://]HOST:PORT`. `PROTO` could be `tcp` or `udp`.
  * `HOST` could be an IP address,
  * IPv6 address (if Mongoose is compiled with `-DMG_ENABLE_IPV6`), or a host
  * name. If `HOST` is a name, Mongoose will resolve it asynchronously. Examples
  * of valid addresses: `google.com:80`, `udp://1.2.3.4:53`, `10.0.0.1:443`,
  * `[::1]:80`
+ *
  * See the `mg_connect_opts` structure for a description of the optional
  * parameters.
+ *
  * Returns a new outbound connection, or `NULL` on error.
+ *
  * NOTE: Connection remains owned by the manager, do not free().
+ *
  * NOTE: To enable IPv6 addresses, `-DMG_ENABLE_IPV6` should be specified
  * in the compilation flags.
+ *
  * NOTE: New connection will receive `MG_EV_CONNECT` as it's first event
  * which will report connect success status.
  * If asynchronous resolution fail, or `connect()` syscall fail for whatever
  * reason (e.g. with `ECONNREFUSED` or `ENETUNREACH`), then `MG_EV_CONNECT`
  * event report failure. Code example below:
+ *
  * [source,c]
  * ----
  * static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  *   int connect_status;
+ *
  *   switch (ev) {
  *     case MG_EV_CONNECT:
  *       connect_status = * (int *) ev_data;
  *       if (connect_status == 0) {
  *         // Success
  *       } else  {
  *         // Error
  *         printf("connect() error: %s\n", strerror(connect_status));
  *       }
  *       break;
  *     ...
  *   }
  * }
+ *
  *   ...
  *   mg_connect(mgr, "my_site.com:80", ev_handler);
  * ----
  */
 struct mg_connection *mg_connect_opt(struct mg_mgr *, const char *,
                                      mg_event_handler_t,
                                      struct mg_connect_opts);
 /*
  * Enable SSL for a given connection.
  * `cert` is a server certificate file name for a listening connection,
  * or a client certificate file name for an outgoing connection.
  * Certificate files must be in PEM format. Server certificate file
  * must contain a certificate, concatenated with a private key, optionally
  * concatenated with parameters.
  * `ca_cert` is a CA certificate, or NULL if peer verification is not
  * required.
  * Return: NULL on success, or error message on error.
  */
 const char *mg_set_ssl(struct mg_connection *nc, const char *cert,
                        const char *ca_cert);
 // Convenience function -- create detached thread.
 // Return: 0 on success, non-0 on error.
 typedef void * (*mg_thread_func_t)(void *);
 int mg_start_thread(mg_thread_func_t f, void *p);
 /*
  * Send data to the connection.
+ *
  * Note that sending functions do not actually push data to the socket.
  * They just append data to the output buffer. MG_EV_SEND will be delivered when
  * the data has actually been pushed out.
  */
 void mg_send(struct mg_connection *, const void *buf, int len);
 /* Enables format string warnings for mg_printf */
 #if defined(__GNUC__)
 __attribute__((format(printf, 2, 3)))
 #endif
 /* don't separate from mg_printf declaration */
 // Return builtin mime type for the given file name.
 // For unrecognized extensions, "text/plain" is returned.
 const char *mg_get_builtin_mime_type(const char *file_name);
 /*
  * Send `printf`-style formatted data to the connection.
+ *
  * See `mg_send` for more details on send semantics.
  */
 int mg_printf(struct mg_connection *, const char *fmt, ...);
 /* Same as `mg_printf()`, but takes `va_list ap` as an argument. */
 int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
 // Return Mongoose version.
 const char *mg_version(void);
 /*
  * Create a socket pair.
  * `sock_type` can be either `SOCK_STREAM` or `SOCK_DGRAM`.
  * Return 0 on failure, 1 on success.
  */
 int mg_socketpair(sock_t[2], int sock_type);
 /*
  * Convert domain name into IP address.
+ *
  * This is a utility function. If compilation flags have
  * `-DMG_ENABLE_GETADDRINFO`, then `getaddrinfo()` call is used for name
  * resolution. Otherwise, `gethostbyname()` is used.
+ *
  * CAUTION: this function can block.
  * Return 1 on success, 0 on failure.
  */
 #ifndef MG_DISABLE_SYNC_RESOLVER
 int mg_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_len);
 #endif
 // MD5 hash given strings.
 // Buffer 'buf' must be 33 bytes long. Varargs is a NULL terminated list of
 // ASCIIz strings. When function returns, buf will contain human-readable
 // MD5 hash. Example:
 //   char buf[33];
 //   mg_md5(buf, "aa", "bb", NULL);
 void mg_md5(char buf[33], ...);
 /*
  * Verify given IP address against the ACL.
+ *
  * `remote_ip` - an IPv4 address to check, in host byte order
  * `acl` - a comma separated list of IP subnets: `x.x.x.x/x` or `x.x.x.x`.
  * Each subnet is
  * prepended by either a - or a + sign. A plus sign means allow, where a
  * minus sign means deny. If a subnet mask is omitted, such as `-1.2.3.4`,
  * this means to deny only that single IP address.
  * Subnet masks may vary from 0 to 32, inclusive. The default setting
  * is to allow all accesses. On each request the full list is traversed,
  * and the last match wins. Example:
+ *
  * `-0.0.0.0/0,+192.168/16` - deny all acccesses, only allow 192.168/16 subnet
+ *
  * To learn more about subnet masks, see the
  * link:https://en.wikipedia.org/wiki/Subnetwork[Wikipedia page on Subnetwork]
+ *
  * Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
  */
 int mg_check_ip_acl(const char *acl, uint32_t remote_ip);
 /*
  * Enable multi-threaded handling for the given listening connection `nc`.
  * For each accepted connection, Mongoose will create a separate thread
  * and run event handler in that thread. Thus, if an event hanler is doing
  * a blocking call or some long computation, that will not slow down
  * other connections.
  */
 void mg_enable_multithreading(struct mg_connection *nc);
 #ifdef MG_ENABLE_JAVASCRIPT
 /*
  * Enable server-side JavaScript scripting.
  * Requires `-DMG_ENABLE_JAVASCRIPT` compilation flag, and V7 engine sources.
  * v7 instance must not be destroyed during manager's lifetime.
  * Return V7 error.
  */
 enum v7_err mg_enable_javascript(struct mg_mgr *m, struct v7 *v7,
                                  const char *init_js_file_name);
 #endif
 #ifdef __cplusplus
+}
 #endif // __cplusplus
 #endif /* __cplusplus */
 #endif /* MG_NET_HEADER_INCLUDED */
 #ifndef MG_NET_IF_HEADER_INCLUDED
 #define MG_NET_IF_HEADER_INCLUDED
 /*
  * Internal async networking core interface.
  * Consists of calls made by the core, which should not block,
  * and callbacks back into the core ("..._cb").
  * Callbacks may (will) cause methods to be invoked from within,
  * but methods are not allowed to invoke callbacks inline.
+ *
  * Implementation must ensure that only one callback is invoked at any time.
  */
 /* Request that a TCP connection is made to the specified address. */
 void mg_if_connect_tcp(struct mg_connection *nc,
                        const union socket_address *sa);
 /* Open a UDP socket. Doesn't actually connect anything. */
 void mg_if_connect_udp(struct mg_connection *nc);
 /* Callback invoked by connect methods. err = 0 -> ok, != 0 -> error. */
 void mg_if_connect_cb(struct mg_connection *nc, int err);
 /* Set up a listening TCP socket on a given address. rv = 0 -> ok. */
 int mg_if_listen_tcp(struct mg_connection *nc, union socket_address *sa);
 /* Deliver a new TCP connection. Returns NULL in case on error (unable to
  * create connection, in which case interface state should be discarded. */
 struct mg_connection *mg_if_accept_tcp_cb(struct mg_connection *lc,
                                           union socket_address *sa,
                                           size_t sa_len);
 /* Request that a "listening" UDP socket be created. */
 int mg_if_listen_udp(struct mg_connection *nc, union socket_address *sa);
 /* Send functions for TCP and UDP. Sent data is copied before return. */
 void mg_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len);
 void mg_if_udp_send(struct mg_connection *nc, const void *buf, size_t len);
 /* Callback that reports that data has been put on the wire. */
 void mg_if_sent_cb(struct mg_connection *nc, int num_sent);
 /*
  * Receive callback.
  * buf must be heap-allocated and ownership is transferred to the core.
  * Core will acknowledge consumption by calling mg_if_recved.
  * No more than one chunk of data can be unacknowledged at any time.
  */
 void mg_if_recv_tcp_cb(struct mg_connection *nc, void *buf, int len);
 void mg_if_recv_udp_cb(struct mg_connection *nc, void *buf, int len,
                        union socket_address *sa, size_t sa_len);
 void mg_if_recved(struct mg_connection *nc, size_t len);
 /* Deliver a POLL event to the connection. */
 void mg_if_poll(struct mg_connection *nc, time_t now);
 /* Perform interface-related cleanup on connection before destruction. */
 void mg_if_destroy_conn(struct mg_connection *nc);
 void mg_close_conn(struct mg_connection *nc);
 /* Put connection's address into *sa, local (remote = 0) or remote. */
 void mg_if_get_conn_addr(struct mg_connection *nc, int remote,
                          union socket_address *sa);
 #endif /* MG_NET_IF_HEADER_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === Utilities
  */
 #ifndef MG_UTIL_HEADER_DEFINED
 #define MG_UTIL_HEADER_DEFINED
 #include <stdio.h>
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #ifndef MAX_PATH_SIZE
 #define MAX_PATH_SIZE 500
 #endif
 /*
  * Fetch substring from input string `s`, `end` into `v`.
  * Skips initial delimiter characters. Records first non-delimiter character
  * as the beginning of substring `v`. Then scans the rest of the string
  * until a delimiter character or end-of-string is found.
  * `delimiters` is a 0-terminated string containing delimiter characters.
  * Either one of `delimiters` or `end_string` terminates the search.
  * Return an `s` pointer, advanced forward where parsing stopped.
  */
 const char *mg_skip(const char *s, const char *end_string,
                     const char *delimiters, struct mg_str *v);
 /*
  * Cross-platform version of `strncasecmp()`.
  */
 int mg_ncasecmp(const char *s1, const char *s2, size_t len);
 /*
  * Cross-platform version of `strcasecmp()`.
  */
 int mg_casecmp(const char *s1, const char *s2);
 /*
  * Cross-platform version of `strcmp()` where where first string is
  * specified by `struct mg_str`.
  */
 int mg_vcmp(const struct mg_str *str2, const char *str1);
 /*
  * Cross-platform version of `strncasecmp()` where first string is
  * specified by `struct mg_str`.
  */
 int mg_vcasecmp(const struct mg_str *str2, const char *str1);
 /*
  * Decode base64-encoded string `s`, `len` into the destination `dst`.
  * Destination has to have enough space to hold decoded buffer.
  * Decoding stops either when all string has been decoded, or invalid
  * character appeared.
  * Destination is '\0'-terminated.
  * Return number of decoded characters. On success, that should be equal to
  * `len`. On error (invalid character) the return value is smaller then `len`.
  */
 int mg_base64_decode(const unsigned char *s, int len, char *dst);
 /*
  * Base64-encode chunk of memory `src`, `src_len` into the destination `dst`.
  * Destination has to have enough space to hold encoded buffer.
  * Destination is '\0'-terminated.
  */
 void mg_base64_encode(const unsigned char *src, int src_len, char *dst);
 #ifndef MG_DISABLE_FILESYSTEM
 /*
  * Perform a 64-bit `stat()` call against given file.
+ *
  * `path` should be UTF8 encoded.
+ *
  * Return value is the same as for `stat()` syscall.
  */
 int mg_stat(const char *path, cs_stat_t *st);
 /*
  * Open the given file and return a file stream.
+ *
  * `path` and `mode` should be UTF8 encoded.
+ *
  * Return value is the same as for the `fopen()` call.
  */
 FILE *mg_fopen(const char *path, const char *mode);
 /*
  * Open the given file and return a file stream.
+ *
  * `path` should be UTF8 encoded.
+ *
  * Return value is the same as for the `open()` syscall.
  */
 int mg_open(const char *path, int flag, int mode);
 #endif /* MG_DISABLE_FILESYSTEM */
 #ifdef _WIN32
 #define MG_ENABLE_THREADS
 #endif
 #ifdef MG_ENABLE_THREADS
 /*
  * Start a new detached thread.
  * Arguments and semantic is the same as pthead's `pthread_create()`.
  * `thread_func` is a thread function, `thread_func_param` is a parameter
  * that is passed to the thread function.
  */
 void *mg_start_thread(void *(*thread_func)(void *), void *thread_func_param);
 #endif
 void mg_set_close_on_exec(sock_t);
 #define MG_SOCK_STRINGIFY_IP 1
 #define MG_SOCK_STRINGIFY_PORT 2
 #define MG_SOCK_STRINGIFY_REMOTE 4
 /*
  * Convert connection's local or remote address into string.
+ *
  * The `flags` parameter is a bit mask that controls the behavior,
  * see `MG_SOCK_STRINGIFY_*` definitions.
+ *
  * - MG_SOCK_STRINGIFY_IP - print IP address
  * - MG_SOCK_STRINGIFY_PORT - print port number
  * - MG_SOCK_STRINGIFY_REMOTE - print remote peer's IP/port, not local address
+ *
  * If both port number and IP address are printed, they are separated by `:`.
  * If compiled with `-DMG_ENABLE_IPV6`, IPv6 addresses are supported.
  */
 void mg_conn_addr_to_str(struct mg_connection *nc, char *buf, size_t len,
                          int flags);
 #ifndef MG_DISABLE_SOCKET_IF /* Legacy interface. */
 void mg_sock_to_str(sock_t sock, char *buf, size_t len, int flags);
 #endif
 /*
  * Convert socket's address into string.
+ *
  * `flags` is MG_SOCK_STRINGIFY_IP and/or MG_SOCK_STRINGIFY_PORT.
  */
 void mg_sock_addr_to_str(const union socket_address *sa, char *buf, size_t len,
                          int flags);
 /*
  * Generates human-readable hexdump of memory chunk.
+ *
  * Takes a memory buffer `buf` of length `len` and creates a hex dump of that
  * buffer in `dst`. Generated output is a-la hexdump(1).
  * Return length of generated string, excluding terminating `\0`. If returned
  * length is bigger than `dst_len`, overflow bytes are discarded.
  */
 int mg_hexdump(const void *buf, int len, char *dst, int dst_len);
 /*
  * Generates human-readable hexdump of the data sent or received by connection.
  * `path` is a file name where hexdump should be written. `num_bytes` is
  * a number of bytes sent/received. `ev` is one of the `MG_*` events sent to
  * an event handler. This function is supposed to be called from the
  * event handler.
  */
 void mg_hexdump_connection(struct mg_connection *nc, const char *path,
                            const void *buf, int num_bytes, int ev);
 /*
  * Print message to buffer. If buffer is large enough to hold the message,
  * return buffer. If buffer is to small, allocate large enough buffer on heap,
  * and return allocated buffer.
  * This is a supposed use case:
+ *
  *    char buf[5], *p = buf;
  *    p = mg_avprintf(&p, sizeof(buf), "%s", "hi there");
  *    use_p_somehow(p);
  *    if (p != buf) {
  *      free(p);
  *    }
+ *
  * The purpose of this is to avoid malloc-ing if generated strings are small.
  */
 int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap);
 /*
  * Return true if target platform is big endian.
  */
 int mg_is_big_endian(void);
 /*
  * A helper function for traversing a comma separated list of values.
  * It returns a list pointer shifted to the next value, or NULL if the end
  * of the list found.
  * Value is stored in val vector. If value has form "x=y", then eq_val
  * vector is initialized to point to the "y" part, and val vector length
  * is adjusted to point only to "x".
  * If list is just a comma separated list of entries, like "aa,bb,cc" then
  * `eq_val` will contain zero-length string.
+ *
  * The purpose of this function is to parse comma separated string without
  * any copying/memory allocation.
  */
 const char *mg_next_comma_list_entry(const char *list, struct mg_str *val,
                                      struct mg_str *eq_val);
 /*
  * Match 0-terminated string against a glob pattern.
  * Match is case-insensitive. Return number of bytes matched, or -1 if no match.
  */
 int mg_match_prefix(const char *pattern, int pattern_len, const char *str);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_UTIL_HEADER_DEFINED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === HTTP + Websocket
  */
 #ifndef MG_HTTP_HEADER_DEFINED
 #define MG_HTTP_HEADER_DEFINED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #ifndef MG_MAX_HTTP_HEADERS
 #define MG_MAX_HTTP_HEADERS 40
 #endif
 #ifndef MG_MAX_HTTP_REQUEST_SIZE
 #define MG_MAX_HTTP_REQUEST_SIZE 8192
 #endif
 #ifndef MG_MAX_PATH
 #ifdef PATH_MAX
 #define MG_MAX_PATH PATH_MAX
 #else
 #define MG_MAX_PATH 1024
 #endif
 #endif
 #ifndef MG_MAX_HTTP_SEND_IOBUF
 #define MG_MAX_HTTP_SEND_IOBUF 4096
 #endif
 #ifndef MG_WEBSOCKET_PING_INTERVAL_SECONDS
 #define MG_WEBSOCKET_PING_INTERVAL_SECONDS 5
 #endif
 #ifndef MG_CGI_ENVIRONMENT_SIZE
 #define MG_CGI_ENVIRONMENT_SIZE 8192
 #endif
 #ifndef MG_MAX_CGI_ENVIR_VARS
 #define MG_MAX_CGI_ENVIR_VARS 64
 #endif
 #ifndef MG_ENV_EXPORT_TO_CGI
 #define MG_ENV_EXPORT_TO_CGI "MONGOOSE_CGI"
 #endif
 /* HTTP message */
 struct http_message {
   struct mg_str message; /* Whole message: request line + headers + body */
   /* HTTP Request line (or HTTP response line) */
   struct mg_str method; /* "GET" */
   struct mg_str uri;    /* "/my_file.html" */
   struct mg_str proto;  /* "HTTP/1.1" -- for both request and response */
   /* For responses, code and response status message are set */
   int resp_code;
   struct mg_str resp_status_msg;
   /*
    * Query-string part of the URI. For example, for HTTP request
    *    GET /foo/bar?param1=val1&param2=val2
    *    |    uri    |     query_string     |
+   *
    * Note that question mark character doesn't belong neither to the uri,
    * nor to the query_string
    */
   struct mg_str query_string;
   /* Headers */
   struct mg_str header_names[MG_MAX_HTTP_HEADERS];
   struct mg_str header_values[MG_MAX_HTTP_HEADERS];
   /* Message body */
   struct mg_str body; /* Zero-length for requests with no body */
 };
 struct websocket_message {
   unsigned char *data;
   size_t size;
   unsigned char flags;
 };
 /* HTTP and websocket events. void *ev_data is described in a comment. */
 #define MG_EV_HTTP_REQUEST 100 /* struct http_message * */
 #define MG_EV_HTTP_REPLY 101   /* struct http_message * */
 #define MG_EV_HTTP_CHUNK 102   /* struct http_message * */
 #define MG_EV_SSI_CALL 105     /* char * */
 #define MG_EV_WEBSOCKET_HANDSHAKE_REQUEST 111 /* NULL */
 #define MG_EV_WEBSOCKET_HANDSHAKE_DONE 112    /* NULL */
 #define MG_EV_WEBSOCKET_FRAME 113             /* struct websocket_message * */
 #define MG_EV_WEBSOCKET_CONTROL_FRAME 114     /* struct websocket_message * */
 /*
  * Attach built-in HTTP event handler to the given connection.
  * User-defined event handler will receive following extra events:
+ *
  * - MG_EV_HTTP_REQUEST: HTTP request has arrived. Parsed HTTP request is passed
  *as
  *   `struct http_message` through the handler's `void *ev_data` pointer.
  * - MG_EV_HTTP_REPLY: HTTP reply has arrived. Parsed HTTP reply is passed as
  *   `struct http_message` through the handler's `void *ev_data` pointer.
  * - MG_EV_HTTP_CHUNK: HTTP chunked-encoding chunk has arrived.
  *   Parsed HTTP reply is passed as `struct http_message` through the
  *   handler's `void *ev_data` pointer. `http_message::body` would contain
  *   incomplete, reassembled HTTP body.
  *   It will grow with every new chunk arrived, and
  *   potentially can consume a lot of memory. An event handler may process
  *   the body as chunks are coming, and signal Mongoose to delete processed
  *   body by setting `MG_F_DELETE_CHUNK` in `mg_connection::flags`. When
  *   the last zero chunk is received,
  *   Mongoose sends `MG_EV_HTTP_REPLY` event with
  *   full reassembled body (if handler did not signal to delete chunks) or
  *   with empty body (if handler did signal to delete chunks).
  * - MG_EV_WEBSOCKET_HANDSHAKE_REQUEST: server has received websocket handshake
  *   request. `ev_data` contains parsed HTTP request.
  * - MG_EV_WEBSOCKET_HANDSHAKE_DONE: server has completed Websocket handshake.
  *   `ev_data` is `NULL`.
  * - MG_EV_WEBSOCKET_FRAME: new websocket frame has arrived. `ev_data` is
  *   `struct websocket_message *`
  */
 void mg_set_protocol_http_websocket(struct mg_connection *nc);
 /*
  * Send websocket handshake to the server.
+ *
  * `nc` must be a valid connection, connected to a server. `uri` is an URI
  * to fetch, extra_headers` is extra HTTP headers to send or `NULL`.
+ *
  * This function is intended to be used by websocket client.
  */
 void mg_send_websocket_handshake(struct mg_connection *nc, const char *uri,
                                  const char *extra_headers);
 /*
  * Send websocket frame to the remote end.
+ *
  * `op_and_flags` specifies frame's type, one of:
+ *
  * - WEBSOCKET_OP_CONTINUE
  * - WEBSOCKET_OP_TEXT
  * - WEBSOCKET_OP_BINARY
  * - WEBSOCKET_OP_CLOSE
  * - WEBSOCKET_OP_PING
  * - WEBSOCKET_OP_PONG
+ *
  * Orred with one of the flags:
+ *
  * - WEBSOCKET_DONT_FIN: Don't set the FIN flag on the frame to be sent.
+ *
  * `data` and `data_len` contain frame data.
  */
 void mg_send_websocket_frame(struct mg_connection *nc, int op_and_flags,
                              const void *data, size_t data_len);
 /*
  * Send multiple websocket frames.
+ *
  * Like `mg_send_websocket_frame()`, but composes a frame from multiple buffers.
  */
 void mg_send_websocket_framev(struct mg_connection *nc, int op_and_flags,
                               const struct mg_str *strings, int num_strings);
 /*
  * Send websocket frame to the remote end.
+ *
  * Like `mg_send_websocket_frame()`, but allows to create formatted message
  * with `printf()`-like semantics.
  */
 void mg_printf_websocket_frame(struct mg_connection *nc, int op_and_flags,
                                const char *fmt, ...);
 /*
  * Send buffer `buf` of size `len` to the client using chunked HTTP encoding.
  * This function first sends buffer size as hex number + newline, then
  * buffer itself, then newline. For example,
  *   `mg_send_http_chunk(nc, "foo", 3)` whill append `3\r\nfoo\r\n` string to
  * the `nc->send_mbuf` output IO buffer.
+ *
  * NOTE: HTTP header "Transfer-Encoding: chunked" should be sent prior to
  * using this function.
+ *
  * NOTE: do not forget to send empty chunk at the end of the response,
  * to tell the client that everything was sent. Example:
+ *
  * ```
  *   mg_printf_http_chunk(nc, "%s", "my response!");
  *   mg_send_http_chunk(nc, "", 0); // Tell the client we're finished
  * ```
  */
 void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len);
 /*
  * Send printf-formatted HTTP chunk.
  * Functionality is similar to `mg_send_http_chunk()`.
  */
 void mg_printf_http_chunk(struct mg_connection *, const char *, ...);
 /*
  * Send response status line.
  * If `extra_headers` is not NULL, then `extra_headers` are also sent
  * after the reponse line. `extra_headers` must NOT end end with new line.
  * Example:
+ *
  *      mg_send_response_line(nc, 200, "Access-Control-Allow-Origin: *");
+ *
  * Will result in:
+ *
  *      HTTP/1.1 200 OK\r\n
  *      Access-Control-Allow-Origin: *\r\n
  */
 void mg_send_response_line(struct mg_connection *c, int status_code,
                            const char *extra_headers);
 /*
  * Send response line and headers.
  * This function sends response line with the `status_code`, and automatically
  * sends one header: either "Content-Length", or "Transfer-Encoding".
  * If `content_length` is negative, then "Transfer-Encoding: chunked" header
  * is sent, otherwise, "Content-Length" header is sent.
+ *
  * NOTE: If `Transfer-Encoding` is `chunked`, then message body must be sent
  * using `mg_send_http_chunk()` or `mg_printf_http_chunk()` functions.
  * Otherwise, `mg_send()` or `mg_printf()` must be used.
  * Extra headers could be set through `extra_headers` - and note `extra_headers`
  * must NOT be terminated by a new line.
  */
 void mg_send_head(struct mg_connection *n, int status_code,
                   int64_t content_length, const char *extra_headers);
 /*
  * Send printf-formatted HTTP chunk, escaping HTML tags.
  */
 void mg_printf_html_escape(struct mg_connection *, const char *, ...);
 /* Websocket opcodes, from http://tools.ietf.org/html/rfc6455 */
 #define WEBSOCKET_OP_CONTINUE 0
 #define WEBSOCKET_OP_TEXT 1
 #define WEBSOCKET_OP_BINARY 2
 #define WEBSOCKET_OP_CLOSE 8
 #define WEBSOCKET_OP_PING 9
 #define WEBSOCKET_OP_PONG 10
 /*
  * If set causes the FIN flag to not be set on outbound
  * frames. This enables sending multiple fragments of a single
  * logical message.
+ *
  * The WebSocket protocol mandates that if the FIN flag of a data
  * frame is not set, the next frame must be a WEBSOCKET_OP_CONTINUE.
  * The last frame must have the FIN bit set.
+ *
  * Note that mongoose will automatically defragment incoming messages,
  * so this flag is used only on outbound messages.
  */
 #define WEBSOCKET_DONT_FIN 0x100
 /*
  * Parse a HTTP message.
+ *
  * `is_req` should be set to 1 if parsing request, 0 if reply.
+ *
  * Return number of bytes parsed. If HTTP message is
  * incomplete, `0` is returned. On parse error, negative number is returned.
  */
 int mg_parse_http(const char *s, int n, struct http_message *hm, int is_req);
 /*
  * Search and return header `name` in parsed HTTP message `hm`.
  * If header is not found, NULL is returned. Example:
+ *
  *     struct mg_str *host_hdr = mg_get_http_header(hm, "Host");
  */
 struct mg_str *mg_get_http_header(struct http_message *hm, const char *name);
 /*
  * Parse HTTP header `hdr`. Find variable `var_name` and store it's value
  * in the buffer `buf`, `buf_size`. Return 0 if variable not found, non-zero
  * otherwise.
+ *
  * This function is supposed to parse
  * cookies, authentication headers, etcetera. Example (error handling omitted):
+ *
  *     char user[20];
  *     struct mg_str *hdr = mg_get_http_header(hm, "Authorization");
  *     mg_http_parse_header(hdr, "username", user, sizeof(user));
+ *
  * Return length of the variable's value. If buffer is not large enough,
  * or variable not found, 0 is returned.
  */
 int mg_http_parse_header(struct mg_str *hdr, const char *var_name, char *buf,
                          size_t buf_size);
 /*
  * Parse buffer `buf`, `buf_len` that contains multipart form data chunks.
  * Store chunk name in a `var_name`, `var_name_len` buffer.
  * If a chunk is an uploaded file, then `file_name`, `file_name_len` is
  * filled with an uploaded file name. `chunk`, `chunk_len`
  * points to the chunk data.
+ *
  * Return: number of bytes to skip to the next chunk, or 0 if there are
  *         no more chunks.
+ *
  * Usage example:
+ *
  *    static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  *      switch(ev) {
  *        case MG_EV_HTTP_REQUEST: {
  *          struct http_message *hm = (struct http_message *) ev_data;
  *          char var_name[100], file_name[100];
  *          const char *chunk;
  *          size_t chunk_len, n1, n2;
+ *
  *          n1 = n2 = 0;
  *          while ((n2 = mg_parse_multipart(hm->body.p + n1,
  *                                          hm->body.len - n1,
  *                                          var_name, sizeof(var_name),
  *                                          file_name, sizeof(file_name),
  *                                          &chunk, &chunk_len)) > 0) {
  *            printf("var: %s, file_name: %s, size: %d, chunk: [%.*s]\n",
  *                   var_name, file_name, (int) chunk_len,
  *                   (int) chunk_len, chunk);
  *            n1 += n2;
  *          }
  *        }
  *        break;
+ *
  */
 size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name,
                           size_t var_name_len, char *file_name,
                           size_t file_name_len, const char **chunk,
                           size_t *chunk_len);
 /*
  * Fetch an HTTP form variable.
+ *
  * Fetch a variable `name` from a `buf` into a buffer specified by
  * `dst`, `dst_len`. Destination is always zero-terminated. Return length
  * of a fetched variable. If not found, 0 is returned. `buf` must be
  * valid url-encoded buffer. If destination is too small, `-1` is returned.
  */
 int mg_get_http_var(const struct mg_str *, const char *, char *dst, size_t);
 /* Create Digest authentication header for client request. */
 int mg_http_create_digest_auth_header(char *buf, size_t buf_len,
                                       const char *method, const char *uri,
                                       const char *auth_domain, const char *user,
                                       const char *passwd);
 /*
  * Helper function that creates outbound HTTP connection.
+ *
  * `url` is a URL to fetch. It must be properly URL-encoded, e.g. have
  * no spaces, etc. By default, `mg_connect_http()` sends Connection and
  * Host headers. `extra_headers` is an extra HTTP headers to send, e.g.
  * `"User-Agent: my-app\r\n"`.
  * If `post_data` is NULL, then GET request is created. Otherwise, POST request
  * is created with the specified POST data. Examples:
+ *
  * [source,c]
  * ----
  *   nc1 = mg_connect_http(mgr, ev_handler_1, "http://www.google.com", NULL,
  *                         NULL);
  *   nc2 = mg_connect_http(mgr, ev_handler_1, "https://github.com", NULL, NULL);
  *   nc3 = mg_connect_http(mgr, ev_handler_1, "my_server:8000/form_submit/",
  *                         NULL, "var_1=value_1&var_2=value_2");
  * ----
  */
 struct mg_connection *mg_connect_http(struct mg_mgr *,
                                       mg_event_handler_t event_handler,
                                       const char *url,
                                       const char *extra_headers,
                                       const char *post_data);
 /*
  * This structure defines how `mg_serve_http()` works.
  * Best practice is to set only required settings, and leave the rest as NULL.
  */
 struct mg_serve_http_opts {
   /* Path to web root directory */
   const char *document_root;
   /* List of index files. Default is "" */
   const char *index_files;
   /* Path to a HTTP requests log file. Leave as NULL to disable access log. */
   const char *access_log_file;
   /*
    * Leave as NULL to disable authentication.
    * To enable directory protection with authentication, set this to ".htpasswd"
    * Then, creating ".htpasswd" file in any directory automatically protects
    * it with digest authentication.
    * Use `mongoose` web server binary, or `htdigest` Apache utility to
    * create/manipulate passwords file.
    * Make sure `auth_domain` is set to a valid domain name.
    */
   const char *per_directory_auth_file;
   /* Authorization domain (domain name of this web server) */
   const char *auth_domain;
   /*
    * Leave as NULL to disable authentication.
    * Normally, only selected directories in the document root are protected.
    * If absolutely every access to the web server needs to be authenticated,
    * regardless of the URI, set this option to the path to the passwords file.
    * Format of that file is the same as ".htpasswd" file. Make sure that file
    * is located outside document root to prevent people fetching it.
    */
   const char *global_auth_file;
   /* Set to "no" to disable directory listing. Enabled by default. */
   const char *enable_directory_listing;
   /* SSI files pattern. If not set, "**.shtml$|**.shtm$" is used. */
   const char *ssi_pattern;
   /* IP ACL. By default, NULL, meaning all IPs are allowed to connect */
   const char *ip_acl;
   /* URL rewrites.
+   *
    * Comma-separated list of `uri_pattern=file_or_directory_path` rewrites.
    * When HTTP request is received, Mongoose constructs a file name from the
    * requested URI by combining `document_root` and the URI. However, if the
    * rewrite option is used and `uri_pattern` matches requested URI, then
    * `document_root` is ignored. Instead, `file_or_directory_path` is used,
    * which should be a full path name or a path relative to the web server's
    * current working directory. Note that `uri_pattern`, as all Mongoose
    * patterns, is a prefix pattern.
+   *
    * If uri_pattern starts with `@` symbol, then Mongoose compares it with the
    * HOST header of the request. If they are equal, Mongoose sets document root
    * to `file_or_directory_path`, implementing virtual hosts support.
    * Example: `@foo.com=/document/root/for/foo.com`
+   *
    * If `uri_pattern` starts with `%` symbol, then Mongoose compares it with
    * the listening port. If they match, then Mongoose issues a 301 redirect.
    * For example, to redirect all HTTP requests to the
    * HTTPS port, do `%80=https://my.site.com`. Note that the request URI is
    * automatically appended to the redirect location.
    */
   const char *url_rewrites;
   /* DAV document root. If NULL, DAV requests are going to fail. */
   const char *dav_document_root;
   /* DAV passwords file. If NULL, DAV requests are going to fail. */
   const char *dav_auth_file;
   /* Glob pattern for the files to hide. */
   const char *hidden_file_pattern;
   /* Set to non-NULL to enable CGI, e.g. **.cgi$|**.php$" */
   const char *cgi_file_pattern;
   /* If not NULL, ignore CGI script hashbang and use this interpreter */
   const char *cgi_interpreter;
   /*
    * Comma-separated list of Content-Type overrides for path suffixes, e.g.
    * ".txt=text/plain; charset=utf-8,.c=text/plain"
    */
   const char *custom_mime_types;
   /*
    * Extra HTTP headers to add to each server response.
    * Example: to enable CORS, set this to "Access-Control-Allow-Origin: *".
    */
   const char *extra_headers;
 };
 /*
  * Serve given HTTP request according to the `options`.
+ *
  * Example code snippet:
+ *
  * [source,c]
  * .web_server.c
  * ----
  * static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  *   struct http_message *hm = (struct http_message *) ev_data;
  *   struct mg_serve_http_opts opts = { .document_root = "/var/www" };  // C99
+ *
  *   switch (ev) {
  *     case MG_EV_HTTP_REQUEST:
  *       mg_serve_http(nc, hm, opts);
  *       break;
  *     default:
  *       break;
  *   }
  * }
  * ----
  */
 void mg_serve_http(struct mg_connection *, struct http_message *,
                    struct mg_serve_http_opts);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_HTTP_HEADER_DEFINED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === JSON-RPC
  */
 #ifndef MG_JSON_RPC_HEADER_DEFINED
 #define MG_JSON_RPC_HEADER_DEFINED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 /* JSON-RPC request */
 struct mg_rpc_request {
   struct json_token *message; /* Whole RPC message */
   struct json_token *id;      /* Message ID */
   struct json_token *method;  /* Method name */
   struct json_token *params;  /* Method params */
 };
 /* JSON-RPC response */
 struct mg_rpc_reply {
   struct json_token *message; /* Whole RPC message */
   struct json_token *id;      /* Message ID */
   struct json_token *result;  /* Remote call result */
 };
 /* JSON-RPC error */
 struct mg_rpc_error {
   struct json_token *message;       /* Whole RPC message */
   struct json_token *id;            /* Message ID */
   struct json_token *error_code;    /* error.code */
   struct json_token *error_message; /* error.message */
   struct json_token *error_data;    /* error.data, can be NULL */
 };
 /*
  * Parse JSON-RPC reply contained in `buf`, `len` into JSON tokens array
  * `toks`, `max_toks`. If buffer contains valid reply, `reply` structure is
  * populated. The result of RPC call is located in `reply.result`. On error,
  * `error` structure is populated. Returns: the result of calling
  * `parse_json(buf, len, toks, max_toks)`:
+ *
  * On success, an offset inside `json_string` is returned
  * where parsing has finished. On failure, a negative number is
  * returned, one of:
+ *
  *  - #define JSON_STRING_INVALID           -1
  *  - #define JSON_STRING_INCOMPLETE        -2
  *  - #define JSON_TOKEN_ARRAY_TOO_SMALL    -3
  */
 int mg_rpc_parse_reply(const char *buf, int len, struct json_token *toks,
                        int max_toks, struct mg_rpc_reply *,
                        struct mg_rpc_error *);
 /*
  * Create JSON-RPC request in a given buffer.
+ *
  * Return length of the request, which
  * can be larger then `len` that indicates an overflow.
  * `params_fmt` format string should conform to `json_emit()` API,
  * see https://github.com/cesanta/frozen
  */
 int mg_rpc_create_request(char *buf, int len, const char *method,
                           const char *id, const char *params_fmt, ...);
 /*
  * Create JSON-RPC reply in a given buffer.
+ *
  * Return length of the reply, which
  * can be larger then `len` that indicates an overflow.
  * `result_fmt` format string should conform to `json_emit()` API,
  * see https://github.com/cesanta/frozen
  */
 int mg_rpc_create_reply(char *buf, int len, const struct mg_rpc_request *req,
                         const char *result_fmt, ...);
 /*
  * Create JSON-RPC error reply in a given buffer.
+ *
  * Return length of the error, which
  * can be larger then `len` that indicates an overflow.
  * `fmt` format string should conform to `json_emit()` API,
  * see https://github.com/cesanta/frozen
  */
 int mg_rpc_create_error(char *buf, int len, struct mg_rpc_request *req,
                         int code, const char *message, const char *fmt, ...);
 /* JSON-RPC standard error codes */
 #define JSON_RPC_PARSE_ERROR (-32700)
 #define JSON_RPC_INVALID_REQUEST_ERROR (-32600)
 #define JSON_RPC_METHOD_NOT_FOUND_ERROR (-32601)
 #define JSON_RPC_INVALID_PARAMS_ERROR (-32602)
 #define JSON_RPC_INTERNAL_ERROR (-32603)
 #define JSON_RPC_SERVER_ERROR (-32000)
 /*
  * Create JSON-RPC error in a given buffer.
+ *
  * Return length of the error, which
  * can be larger then `len` that indicates an overflow. See
  * JSON_RPC_*_ERROR definitions for standard error values:
+ *
  * - #define JSON_RPC_PARSE_ERROR (-32700)
  * - #define JSON_RPC_INVALID_REQUEST_ERROR (-32600)
  * - #define JSON_RPC_METHOD_NOT_FOUND_ERROR (-32601)
  * - #define JSON_RPC_INVALID_PARAMS_ERROR (-32602)
  * - #define JSON_RPC_INTERNAL_ERROR (-32603)
  * - #define JSON_RPC_SERVER_ERROR (-32000)
  */
 int mg_rpc_create_std_error(char *, int, struct mg_rpc_request *, int code);
 typedef int (*mg_rpc_handler_t)(char *buf, int len, struct mg_rpc_request *);
 /*
  * Dispatches a JSON-RPC request.
+ *
  * Parses JSON-RPC request contained in `buf`, `len`.
  * Then, dispatches the request to the correct handler method.
  * Valid method names should be specified in NULL
  * terminated array `methods`, and corresponding handlers in `handlers`.
  * Result is put in `dst`, `dst_len`. Return: length of the result, which
  * can be larger then `dst_len` that indicates an overflow.
  * Overflown bytes are not written to the buffer.
  * If method is not found, an error is automatically generated.
  */
 int mg_rpc_dispatch(const char *buf, int, char *dst, int dst_len,
                     const char **methods, mg_rpc_handler_t *handlers);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_JSON_RPC_HEADER_DEFINED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /*
  * === MQTT
  */
 #ifndef MG_MQTT_HEADER_INCLUDED
 #define MG_MQTT_HEADER_INCLUDED
 struct mg_mqtt_message {
   int cmd;
   struct mg_str payload;
   int qos;
   uint8_t connack_ret_code; /* connack */
   uint16_t message_id;      /* puback */
   char *topic;
 };
 struct mg_mqtt_topic_expression {
   const char *topic;
   uint8_t qos;
 };
 struct mg_send_mqtt_handshake_opts {
   unsigned char flags; /* connection flags */
   uint16_t keep_alive;
   const char *will_topic;
   const char *will_message;
   const char *user_name;
   const char *password;
 };
 /* Message types */
 #define MG_MQTT_CMD_CONNECT 1
 #define MG_MQTT_CMD_CONNACK 2
 #define MG_MQTT_CMD_PUBLISH 3
 #define MG_MQTT_CMD_PUBACK 4
 #define MG_MQTT_CMD_PUBREC 5
 #define MG_MQTT_CMD_PUBREL 6
 #define MG_MQTT_CMD_PUBCOMP 7
 #define MG_MQTT_CMD_SUBSCRIBE 8
 #define MG_MQTT_CMD_SUBACK 9
 #define MG_MQTT_CMD_UNSUBSCRIBE 10
 #define MG_MQTT_CMD_UNSUBACK 11
 #define MG_MQTT_CMD_PINGREQ 12
 #define MG_MQTT_CMD_PINGRESP 13
 #define MG_MQTT_CMD_DISCONNECT 14
 /* MQTT event types */
 #define MG_MQTT_EVENT_BASE 200
 #define MG_EV_MQTT_CONNECT (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_CONNECT)
 #define MG_EV_MQTT_CONNACK (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_CONNACK)
 #define MG_EV_MQTT_PUBLISH (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PUBLISH)
 #define MG_EV_MQTT_PUBACK (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PUBACK)
 #define MG_EV_MQTT_PUBREC (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PUBREC)
 #define MG_EV_MQTT_PUBREL (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PUBREL)
 #define MG_EV_MQTT_PUBCOMP (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PUBCOMP)
 #define MG_EV_MQTT_SUBSCRIBE (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_SUBSCRIBE)
 #define MG_EV_MQTT_SUBACK (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_SUBACK)
 #define MG_EV_MQTT_UNSUBSCRIBE (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_UNSUBSCRIBE)
 #define MG_EV_MQTT_UNSUBACK (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_UNSUBACK)
 #define MG_EV_MQTT_PINGREQ (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PINGREQ)
 #define MG_EV_MQTT_PINGRESP (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_PINGRESP)
 #define MG_EV_MQTT_DISCONNECT (MG_MQTT_EVENT_BASE + MG_MQTT_CMD_DISCONNECT)
 /* Message flags */
 #define MG_MQTT_RETAIN 0x1
 #define MG_MQTT_DUP 0x4
 #define MG_MQTT_QOS(qos) ((qos) << 1)
 #define MG_MQTT_GET_QOS(flags) (((flags) &0x6) >> 1)
 #define MG_MQTT_SET_QOS(flags, qos) (flags) = ((flags) & ~0x6) | ((qos) << 1)
 /* Connection flags */
 #define MG_MQTT_CLEAN_SESSION 0x02
 #define MG_MQTT_HAS_WILL 0x04
 #define MG_MQTT_WILL_RETAIN 0x20
 #define MG_MQTT_HAS_PASSWORD 0x40
 #define MG_MQTT_HAS_USER_NAME 0x80
 #define MG_MQTT_GET_WILL_QOS(flags) (((flags) &0x18) >> 3)
 #define MG_MQTT_SET_WILL_QOS(flags, qos) \
   (flags) = ((flags) & ~0x18) | ((qos) << 3)
 /* CONNACK return codes */
 #define MG_EV_MQTT_CONNACK_ACCEPTED 0
 #define MG_EV_MQTT_CONNACK_UNACCEPTABLE_VERSION 1
 #define MG_EV_MQTT_CONNACK_IDENTIFIER_REJECTED 2
 #define MG_EV_MQTT_CONNACK_SERVER_UNAVAILABLE 3
 #define MG_EV_MQTT_CONNACK_BAD_AUTH 4
 #define MG_EV_MQTT_CONNACK_NOT_AUTHORIZED 5
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 /*
  * Attach built-in MQTT event handler to the given connection.
+ *
  * The user-defined event handler will receive following extra events:
+ *
  * - MG_EV_MQTT_CONNACK
  * - MG_EV_MQTT_PUBLISH
  * - MG_EV_MQTT_PUBACK
  * - MG_EV_MQTT_PUBREC
  * - MG_EV_MQTT_PUBREL
  * - MG_EV_MQTT_PUBCOMP
  * - MG_EV_MQTT_SUBACK
  */
 void mg_set_protocol_mqtt(struct mg_connection *);
 /* Send MQTT handshake. */
 void mg_send_mqtt_handshake(struct mg_connection *nc, const char *client_id);
 /* Send MQTT handshake with optional parameters. */
 void mg_send_mqtt_handshake_opt(struct mg_connection *, const char *client_id,
                                 struct mg_send_mqtt_handshake_opts);
 /* Publish a message to a given topic. */
 void mg_mqtt_publish(struct mg_connection *nc, const char *topic,
                      uint16_t message_id, int flags, const void *data,
                      size_t len);
 /* Subscribe to a bunch of topics. */
 void mg_mqtt_subscribe(struct mg_connection *nc,
                        const struct mg_mqtt_topic_expression *topics,
                        size_t topics_len, uint16_t message_id);
 /* Unsubscribe from a bunch of topics. */
 void mg_mqtt_unsubscribe(struct mg_connection *nc, char **topics,
                          size_t topics_len, uint16_t message_id);
 /* Send a DISCONNECT command. */
 void mg_mqtt_disconnect(struct mg_connection *nc);
 /* Send a CONNACK command with a given `return_code`. */
 void mg_mqtt_connack(struct mg_connection *, uint8_t);
 /* Send a PUBACK command with a given `message_id`. */
 void mg_mqtt_puback(struct mg_connection *, uint16_t);
 /* Send a PUBREC command with a given `message_id`. */
 void mg_mqtt_pubrec(struct mg_connection *, uint16_t);
 /* Send a PUBREL command with a given `message_id`. */
 void mg_mqtt_pubrel(struct mg_connection *, uint16_t);
 /* Send a PUBCOMP command with a given `message_id`. */
 void mg_mqtt_pubcomp(struct mg_connection *, uint16_t);
 /*
  * Send a SUBACK command with a given `message_id`
  * and a sequence of granted QoSs.
  */
 void mg_mqtt_suback(struct mg_connection *, uint8_t *, size_t, uint16_t);
 /* Send a UNSUBACK command with a given `message_id`. */
 void mg_mqtt_unsuback(struct mg_connection *, uint16_t);
 /* Send a PINGREQ command. */
 void mg_mqtt_ping(struct mg_connection *);
 /* Send a PINGRESP command. */
 void mg_mqtt_pong(struct mg_connection *);
 /*
  * Extract the next topic expression from a SUBSCRIBE command payload.
+ *
  * Topic expression name will point to a string in the payload buffer.
  * Return the pos of the next topic expression or -1 when the list
  * of topics is exhausted.
  */
 int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *, struct mg_str *,
                                  uint8_t *, int);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_MQTT_HEADER_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /*
  * === MQTT Broker
  */
 #ifndef MG_MQTT_BROKER_HEADER_INCLUDED
 #define MG_MQTT_BROKER_HEADER_INCLUDED
 #ifdef MG_ENABLE_MQTT_BROKER
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #define MG_MQTT_MAX_SESSION_SUBSCRIPTIONS 512;
 struct mg_mqtt_broker;
 /* MQTT session (Broker side). */
 struct mg_mqtt_session {
   struct mg_mqtt_broker *brk;          /* Broker */
   struct mg_mqtt_session *next, *prev; /* mg_mqtt_broker::sessions linkage */
   struct mg_connection *nc;            /* Connection with the client */
   size_t num_subscriptions;            /* Size of `subscriptions` array */
   struct mg_mqtt_topic_expression *subscriptions;
   void *user_data; /* User data */
 };
 /* MQTT broker. */
 struct mg_mqtt_broker {
   struct mg_mqtt_session *sessions; /* Session list */
   void *user_data;                  /* User data */
 };
 /* Initialize a MQTT broker. */
 void mg_mqtt_broker_init(struct mg_mqtt_broker *, void *);
 /*
  * Process a MQTT broker message.
+ *
  * Listening connection expects a pointer to an initialized `mg_mqtt_broker`
  * structure in the `user_data` field.
+ *
  * Basic usage:
+ *
  * [source,c]
  * -----
  * mg_mqtt_broker_init(&brk, NULL);
+ *
  * if ((nc = mg_bind(&mgr, address, mg_mqtt_broker)) == NULL) {
  *   // fail;
  * }
  * nc->user_data = &brk;
  * -----
+ *
  * New incoming connections will receive a `mg_mqtt_session` structure
  * in the connection `user_data`. The original `user_data` will be stored
  * in the `user_data` field of the session structure. This allows the user
  * handler to store user data before `mg_mqtt_broker` creates the session.
+ *
  * Since only the MG_EV_ACCEPT message is processed by the listening socket,
  * for most events the `user_data` will thus point to a `mg_mqtt_session`.
  */
 void mg_mqtt_broker(struct mg_connection *, int, void *);
 /*
  * Iterate over all mqtt sessions connections. Example:
+ *
  *    struct mg_mqtt_session *s;
  *    for (s = mg_mqtt_next(brk, NULL); s != NULL; s = mg_mqtt_next(brk, s)) {
  *       // Do something
  *    }
  */
 struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *,
                                      struct mg_mqtt_session *);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_ENABLE_MQTT_BROKER */
 #endif /* MG_MQTT_HEADER_INCLUDED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === DNS
  */
 #ifndef MG_DNS_HEADER_DEFINED
 #define MG_DNS_HEADER_DEFINED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #define MG_DNS_A_RECORD 0x01     /* Lookup IP address */
 #define MG_DNS_CNAME_RECORD 0x05 /* Lookup CNAME */
 #define MG_DNS_AAAA_RECORD 0x1c  /* Lookup IPv6 address */
 #define MG_DNS_MX_RECORD 0x0f    /* Lookup mail server for domain */
 #define MG_MAX_DNS_QUESTIONS 32
 #define MG_MAX_DNS_ANSWERS 32
 #define MG_DNS_MESSAGE 100 /* High-level DNS message event */
 enum mg_dns_resource_record_kind {
   MG_DNS_INVALID_RECORD = 0,
   MG_DNS_QUESTION,
   MG_DNS_ANSWER
 };
 /* DNS resource record. */
 struct mg_dns_resource_record {
   struct mg_str name; /* buffer with compressed name */
   int rtype;
   int rclass;
   int ttl;
   enum mg_dns_resource_record_kind kind;
   struct mg_str rdata; /* protocol data (can be a compressed name) */
 };
 /* DNS message (request and response). */
 struct mg_dns_message {
   struct mg_str pkt; /* packet body */
   uint16_t flags;
   uint16_t transaction_id;
   int num_questions;
   int num_answers;
   struct mg_dns_resource_record questions[MG_MAX_DNS_QUESTIONS];
   struct mg_dns_resource_record answers[MG_MAX_DNS_ANSWERS];
 };
 struct mg_dns_resource_record *mg_dns_next_record(
     struct mg_dns_message *, int, struct mg_dns_resource_record *);
 /*
  * Parse the record data from a DNS resource record.
+ *
  *  - A:     struct in_addr *ina
  *  - AAAA:  struct in6_addr *ina
  *  - CNAME: char buffer
+ *
  * Returns -1 on error.
+ *
  * TODO(mkm): MX
  */
 int mg_dns_parse_record_data(struct mg_dns_message *,
                              struct mg_dns_resource_record *, void *, size_t);
 /*
  * Send a DNS query to the remote end.
  */
 void mg_send_dns_query(struct mg_connection *, const char *, int);
 /*
  * Insert a DNS header to an IO buffer.
+ *
  * Return number of bytes inserted.
  */
 int mg_dns_insert_header(struct mbuf *, size_t, struct mg_dns_message *);
 /*
  * Append already encoded body from an existing message.
+ *
  * This is useful when generating a DNS reply message which includes
  * all question records.
+ *
  * Return number of appened bytes.
  */
 int mg_dns_copy_body(struct mbuf *, struct mg_dns_message *);
 /*
  * Encode and append a DNS resource record to an IO buffer.
+ *
  * The record metadata is taken from the `rr` parameter, while the name and data
  * are taken from the parameters, encoded in the appropriate format depending on
  * record type, and stored in the IO buffer. The encoded values might contain
  * offsets within the IO buffer. It's thus important that the IO buffer doesn't
  * get trimmed while a sequence of records are encoded while preparing a DNS
  *reply.
+ *
  * This function doesn't update the `name` and `rdata` pointers in the `rr`
  *struct
  * because they might be invalidated as soon as the IO buffer grows again.
+ *
  * Return the number of bytes appened or -1 in case of error.
  */
 int mg_dns_encode_record(struct mbuf *, struct mg_dns_resource_record *,
                          const char *, size_t, const void *, size_t);
 /* Low-level: parses a DNS response. */
 int mg_parse_dns(const char *, int, struct mg_dns_message *);
 /*
  * Uncompress a DNS compressed name.
+ *
  * The containing dns message is required because the compressed encoding
  * and reference suffixes present elsewhere in the packet.
+ *
  * If name is less than `dst_len` characters long, the remainder
  * of `dst` is terminated with `\0' characters. Otherwise, `dst` is not
  *terminated.
+ *
  * If `dst_len` is 0 `dst` can be NULL.
  * Return the uncompressed name length.
  */
 size_t mg_dns_uncompress_name(struct mg_dns_message *, struct mg_str *, char *,
                               int);
 /*
  * Attach built-in DNS event handler to the given listening connection.
+ *
  * DNS event handler parses incoming UDP packets, treating them as DNS
  * requests. If incoming packet gets successfully parsed by the DNS event
  * handler, a user event handler will receive `MG_DNS_REQUEST` event, with
  * `ev_data` pointing to the parsed `struct mg_dns_message`.
+ *
  * See
  * https://github.com/cesanta/mongoose/tree/master/examples/captive_dns_server[captive_dns_server]
  * example on how to handle DNS request and send DNS reply.
  */
 void mg_set_protocol_dns(struct mg_connection *);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_HTTP_HEADER_DEFINED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === DNS server
+ *
  * Disabled by default; enable with `-DMG_ENABLE_DNS_SERVER`.
  */
 #ifndef MG_DNS_SERVER_HEADER_DEFINED
 #define MG_DNS_SERVER_HEADER_DEFINED
 #ifdef MG_ENABLE_DNS_SERVER
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 #define MG_DNS_SERVER_DEFAULT_TTL 3600
 struct mg_dns_reply {
   struct mg_dns_message *msg;
   struct mbuf *io;
   size_t start;
 };
 /*
  * Create a DNS reply.
+ *
  * The reply will be based on an existing query message `msg`.
  * The query body will be appended to the output buffer.
  * "reply + recursion allowed" will be added to the message flags and
  * message's num_answers will be set to 0.
+ *
  * Answer records can be appended with `mg_dns_send_reply` or by lower
  * level function defined in the DNS API.
+ *
  * In order to send the reply use `mg_dns_send_reply`.
  * It's possible to use a connection's send buffer as reply buffers,
  * and it will work for both UDP and TCP connections.
+ *
  * Example:
+ *
  * [source,c]
  * -----
  * reply = mg_dns_create_reply(&nc->send_mbuf, msg);
  * for (i = 0; i < msg->num_questions; i++) {
  *   rr = &msg->questions[i];
  *   if (rr->rtype == MG_DNS_A_RECORD) {
  *     mg_dns_reply_record(&reply, rr, 3600, &dummy_ip_addr, 4);
  *   }
  * }
  * mg_dns_send_reply(nc, &reply);
  * -----
  */
 struct mg_dns_reply mg_dns_create_reply(struct mbuf *, struct mg_dns_message *);
 /*
  * Append a DNS reply record to the IO buffer and to the DNS message.
+ *
  * The message num_answers field will be incremented. It's caller's duty
  * to ensure num_answers is propertly initialized.
+ *
  * Returns -1 on error.
  */
 int mg_dns_reply_record(struct mg_dns_reply *, struct mg_dns_resource_record *,
                         const char *, int, int, const void *, size_t);
 /*
  * Send a DNS reply through a connection.
+ *
  * The DNS data is stored in an IO buffer pointed by reply structure in `r`.
  * This function mutates the content of that buffer in order to ensure that
  * the DNS header reflects size and flags of the mssage, that might have been
  * updated either with `mg_dns_reply_record` or by direct manipulation of
  * `r->message`.
+ *
  * Once sent, the IO buffer will be trimmed unless the reply IO buffer
  * is the connection's send buffer and the connection is not in UDP mode.
  */
 void mg_dns_send_reply(struct mg_connection *, struct mg_dns_reply *);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_ENABLE_DNS_SERVER */
 #endif /* MG_HTTP_HEADER_DEFINED */
 /*
  * Copyright (c) 2014 Cesanta Software Limited
  * All rights reserved
  */
 /*
  * === Asynchronouns DNS resolver
  */
 #ifndef MG_RESOLV_HEADER_DEFINED
 #define MG_RESOLV_HEADER_DEFINED
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 typedef void (*mg_resolve_callback_t)(struct mg_dns_message *, void *);
 /* Options for `mg_resolve_async_opt`. */
 struct mg_resolve_async_opts {
   const char *nameserver_url;
   int max_retries;    /* defaults to 2 if zero */
   int timeout;        /* in seconds; defaults to 5 if zero */
   int accept_literal; /* pseudo-resolve literal ipv4 and ipv6 addrs */
   int only_literal;   /* only resolves literal addrs; sync cb invocation */
 };
 /* See `mg_resolve_async_opt()` */
 int mg_resolve_async(struct mg_mgr *, const char *, int, mg_resolve_callback_t,
                      void *data);
 /*
  * Resolved a DNS name asynchronously.
+ *
  * Upon successful resolution, the user callback will be invoked
  * with the full DNS response message and a pointer to the user's
  * context `data`.
+ *
  * In case of timeout while performing the resolution the callback
  * will receive a NULL `msg`.
+ *
  * The DNS answers can be extracted with `mg_next_record` and
  * `mg_dns_parse_record_data`:
+ *
  * [source,c]
  * ----
  * struct in_addr ina;
  * struct mg_dns_resource_record *rr = mg_next_record(msg, MG_DNS_A_RECORD,
  *   NULL);
  * mg_dns_parse_record_data(msg, rr, &ina, sizeof(ina));
  * ----
  */
 int mg_resolve_async_opt(struct mg_mgr *, const char *, int,
                          mg_resolve_callback_t, void *data,
                          struct mg_resolve_async_opts opts);
 /*
  * Resolve a name from `/etc/hosts`.
+ *
  * Returns 0 on success, -1 on failure.
  */
 int mg_resolve_from_hosts_file(const char *host, union socket_address *usa);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_RESOLV_HEADER_DEFINED */
 /*
  * Copyright (c) 2015 Cesanta Software Limited
  * All rights reserved
  * This software is dual-licensed: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation. For the terms of this
  * license, see <http://www.gnu.org/licenses/>.
+ *
  * You are free to use this software under the terms of the GNU General
  * Public License, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
+ *
  * Alternatively, you can license this software under a commercial
  * license, as set out in <https://www.cesanta.com/license>.
  */
 /*
  * === CoAP
+ *
  * CoAP message format:
+ *
  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
  *    |Ver| T | TKL | Code | Message ID | Token (if any, TKL bytes) ...
  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
  *    | Options (if any) ...            |1 1 1 1 1 1 1 1| Payload (if any) ...
  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
  */
 #ifndef MG_COAP_HEADER_INCLUDED
 #define MG_COAP_HEADER_INCLUDED
 #ifdef MG_ENABLE_COAP
 #define MG_COAP_MSG_TYPE_FIELD 0x2
 #define MG_COAP_CODE_CLASS_FIELD 0x4
 #define MG_COAP_CODE_DETAIL_FIELD 0x8
 #define MG_COAP_MSG_ID_FIELD 0x10
 #define MG_COAP_TOKEN_FIELD 0x20
 #define MG_COAP_OPTIOMG_FIELD 0x40
 #define MG_COAP_PAYLOAD_FIELD 0x80
 #define MG_COAP_ERROR 0x10000
 #define MG_COAP_FORMAT_ERROR (MG_COAP_ERROR | 0x20000)
 #define MG_COAP_IGNORE (MG_COAP_ERROR | 0x40000)
 #define MG_COAP_NOT_ENOUGH_DATA (MG_COAP_ERROR | 0x80000)
 #define MG_COAP_NETWORK_ERROR (MG_COAP_ERROR | 0x100000)
 #define MG_COAP_MSG_CON 0
 #define MG_COAP_MSG_NOC 1
 #define MG_COAP_MSG_ACK 2
 #define MG_COAP_MSG_RST 3
 #define MG_COAP_MSG_MAX 3
 #define MG_COAP_CODECLASS_REQUEST 0
 #define MG_COAP_CODECLASS_RESP_OK 2
 #define MG_COAP_CODECLASS_CLIENT_ERR 4
 #define MG_COAP_CODECLASS_SRV_ERR 5
 #define MG_COAP_EVENT_BASE 300
 #define MG_EV_COAP_CON (MG_COAP_EVENT_BASE + MG_COAP_MSG_CON)
 #define MG_EV_COAP_NOC (MG_COAP_EVENT_BASE + MG_COAP_MSG_NOC)
 #define MG_EV_COAP_ACK (MG_COAP_EVENT_BASE + MG_COAP_MSG_ACK)
 #define MG_EV_COAP_RST (MG_COAP_EVENT_BASE + MG_COAP_MSG_RST)
 /*
  * CoAP options.
  * Use mg_coap_add_option and mg_coap_free_options
  * for creation and destruction.
  */
 struct mg_coap_option {
   struct mg_coap_option *next;
   uint32_t number;
   struct mg_str value;
 };
 /* CoAP message. See RFC 7252 for details. */
 struct mg_coap_message {
   uint32_t flags;
   uint8_t msg_type;
   uint8_t code_class;
   uint8_t code_detail;
   uint16_t msg_id;
   struct mg_str token;
   struct mg_coap_option *options;
   struct mg_str payload;
   struct mg_coap_option *optiomg_tail;
 };
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 /* Set CoAP protocol handler - trigger CoAP specific events */
 int mg_set_protocol_coap(struct mg_connection *nc);
 /*
  * Add new option to mg_coap_message structure.
  * Returns pointer to the newly created option.
  */
 struct mg_coap_option *mg_coap_add_option(struct mg_coap_message *cm,
                                           uint32_t number, char *value,
                                           size_t len);
 /*
  * Free the memory allocated for options,
  * if cm paramater doesn't contain any option does nothing.
  */
 void mg_coap_free_options(struct mg_coap_message *cm);
 /*
  * Compose CoAP message from `mg_coap_message`
  * and send it into `nc` connection.
  * Return 0 on success. On error, it is a bitmask:
+ *
  * - #define MG_COAP_ERROR 0x10000
  * - #define MG_COAP_FORMAT_ERROR (MG_COAP_ERROR | 0x20000)
  * - #define MG_COAP_IGNORE (MG_COAP_ERROR | 0x40000)
  * - #define MG_COAP_NOT_ENOUGH_DATA (MG_COAP_ERROR | 0x80000)
  * - #define MG_COAP_NETWORK_ERROR (MG_COAP_ERROR | 0x100000)
  */
 uint32_t mg_coap_send_message(struct mg_connection *nc,
                               struct mg_coap_message *cm);
 /*
  * Compose CoAP acknowledgement from `mg_coap_message`
  * and send it into `nc` connection.
  * Return value: see `mg_coap_send_message()`
  */
 uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id);
 /*
  * Parse COAP message and fills mg_coap_message and returns cm->flags.
  * This is a helper function.
+ *
  * NOTE: usually CoAP work over UDP, so lack of data means format error,
  * but in theory it is possible to use CoAP over TCP (according to RFC)
+ *
  * The caller have to check results and treat COAP_NOT_ENOUGH_DATA according to
  * underlying protocol:
+ *
  * - in case of UDP COAP_NOT_ENOUGH_DATA means COAP_FORMAT_ERROR,
  * - in case of TCP client can try to receive more data
+ *
  * Return value: see `mg_coap_send_message()`
  */
 uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm);
 /*
  * Composes CoAP message from mg_coap_message structure.
  * This is a helper function.
  * Return value: see `mg_coap_send_message()`
  */
 uint32_t mg_coap_compose(struct mg_coap_message *cm, struct mbuf *io);
 #ifdef __cplusplus
+}
 #endif /* __cplusplus */
 #endif /* MG_ENABLE_COAP */
-#endif // MONGOOSE_HEADER_INCLUDED
+#endif /* MG_COAP_HEADER_INCLUDED */

spectrum_manager/src/server.cpp

➞

Show inline comments

@@ @@ -122,10 +122,9 @@ padding-left: 15px;\ @@
+}
-static void get_qsvar(const struct mg_request_info *request_info,
+static void get_qsvar(const struct http_message *hm,
                       const char *name, char *dst, size_t dst_len) {
   const char *qs = request_info->query_string;
   mg_get_var(qs, strlen(qs == NULL ? "" : qs), name, dst, dst_len);
 	mg_get_http_var(&hm->query_string, name, dst, dst_len);
+}
 static void my_strlcpy(char *dst, const char *src, size_t len) {
 // This is why all communication must be SSL-ed.
 static void generate_session_id(char *buf, const char *random,
                                 const char *user) {
   mg_md5(buf, random, user, NULL);
   cs_md5(buf, random, strlen(random), user, strlen(user), NULL);
+}
 static void _event_handler(struct mg_connection *nc, int ev, void *p) {
 	static_cast<Server *>(nc->mgr->user_data)->event_handler(nc, ev, p);
+}
 Server::Server(ManagerConfig *config) {
@@ @@ -146,30 +149,19 @@ Server::Server(ManagerConfig *config) { @@
 	m_config = config;
 	m_user = CONFIG_STRING(m_config, "service.admin_username");
 	m_password = CONFIG_STRING(m_config, "service.admin_password");
+}
 Server::~Server() {
 	if (ctx) {
 		mg_stop(ctx);
 	mg_mgr_init(&m_mgr, this);
 	m_nc = mg_bind(&m_mgr, std::string(":" + boost::lexical_cast<std::string>(CONFIG_INT(m_config, "service.port"))).c_str(), &_event_handler);
 	mg_set_protocol_http_websocket(m_nc);
+}
+}
 static void *_event_handler(enum mg_event event, struct mg_connection *conn) {
 	const struct mg_request_info *request_info = mg_get_request_info(conn);
 	return static_cast<Server *>(request_info->user_data)->event_handler(event, conn);
 Server::~Server() {
 	mg_mgr_free(&m_mgr);
+}
 bool Server::start() {
 	const char *options[] = {
 		"listening_ports", boost::lexical_cast<std::string>(CONFIG_INT(m_config, "service.port")).c_str(),
 		"num_threads", "1",
 		NULL
 	};
 	// Setup and start Mongoose
 	if ((ctx = mg_start(&_event_handler, this, options)) == NULL) {
 		return false;
 	for (;;) {
 		mg_mgr_poll(&m_mgr, 1000);
+	}
 	return true;
@@ @@ -193,10 +185,12 @@ Server::session *Server::new_session(const char *user) { @@
+}
 // Get session object for the connection. Caller must hold the lock.
-Server::session *Server::get_session(const struct mg_connection *conn) {
+Server::session *Server::get_session(struct http_message *hm) {
 	time_t now = time(NULL);
 	char session_id[33];
 	mg_get_cookie(conn, "session", session_id, sizeof(session_id));
 	char session_id[255];
 	struct mg_str *hdr = mg_get_http_header(hm, "Cookie");
 	int len = mg_http_parse_header(hdr, "session", session_id, sizeof(session_id));
 	session_id[len] = 0;
 	if (sessions.find(session_id) == sessions.end()) {
 		return NULL;
 	return NULL;
+}
-void Server::authorize(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::authorize(struct mg_connection *conn, struct http_message *hm) {
 	char user[255], password[255];
 	Server::session *session;
 	// Fetch user name and password.
 	get_qsvar(request_info, "user", user, sizeof(user));
 	get_qsvar(request_info, "password", password, sizeof(password));
 	get_qsvar(hm, "user", user, sizeof(user));
 	get_qsvar(hm, "password", password, sizeof(password));
 	if (check_password(user, password) && (session = new_session(user)) != NULL) {
 		std::cout << "User authorized\n";
 			session->session_id, session->user);
 	} else {
 		// Authentication failure, redirect to login.
-		redirect_to(conn, request_info, "/login");
+		redirect_to(conn, hm, "/login");
+	}
+}
-bool Server::is_authorized(const struct mg_connection *conn, const struct mg_request_info *request_info) {
+bool Server::is_authorized(const struct mg_connection *conn, struct http_message *hm) {
 	Server::session *session;
 	char valid_id[33];
 	bool authorized = false;
 	// Always authorize accesses to login page and to authorize URI
 	if (!strcmp(request_info->uri, "/login") ||
 		!strcmp(request_info->uri, "/authorize")) {
 	if (!mg_vcmp(&hm->uri, "/login") ||
 		!mg_vcmp(&hm->uri, "/authorize")) {
 		return true;
+	}
 // 	pthread_rwlock_rdlock(&rwlock);
-	if ((session = get_session(conn)) != NULL) {
+	if ((session = get_session(hm)) != NULL) {
 		generate_session_id(valid_id, session->random, session->user);
 		if (strcmp(valid_id, session->session_id) == 0) {
 			session->expire = time(0) + SESSION_TTL;
 	return authorized;
+}
-void Server::redirect_to(struct mg_connection *conn, const struct mg_request_info *request_info, const char *where) {
+void Server::redirect_to(struct mg_connection *conn, struct http_message *hm, const char *where) {
 	mg_printf(conn, "HTTP/1.1 302 Found\r\n"
 		"Set-Cookie: original_url=%s\r\n"
 		"Location: %s\r\n\r\n",
 		request_info->uri, where);
 		"Set-Cookie: original_url=/\r\n"
 		"Location: %s\r\n\r\n", where);
+}
-void Server::print_html(struct mg_connection *conn, const struct mg_request_info *request_info, const std::string &html) {
+void Server::print_html(struct mg_connection *conn, struct http_message *hm, const std::string &html) {
 	mg_printf(conn,
 			"HTTP/1.1 200 OK\r\n"
 			"Content-Type: text/html\r\n"
 			(int) html.size(), html.c_str());
+}
-void Server::serve_login(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_login(struct mg_connection *conn, struct http_message *hm) {
 	std::string html= "\
 <!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\
   \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"> \
   </body>\
 </html>";
-	print_html(conn, request_info, html);
+	print_html(conn, hm, html);
+}
-void Server::serve_onlineusers(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_onlineusers(struct mg_connection *conn, struct http_message *hm) {
 	std::string html = get_header();
 	char jid[255];
-	get_qsvar(request_info, "jid", jid, sizeof(jid));
+	get_qsvar(hm, "jid", jid, sizeof(jid));
 	html += std::string("<h2>") + jid + " online users</h2><table><tr><th>JID<th>Command</th></tr>";
 	html += "</table><a href=\"/\">Back to main page</a>";
 	html += "</body></html>";
-	print_html(conn, request_info, html);
+	print_html(conn, hm, html);
+}
-void Server::serve_cmd(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_cmd(struct mg_connection *conn, struct http_message *hm) {
 	std::string html = get_header();
 	char jid[255];
-	get_qsvar(request_info, "jid", jid, sizeof(jid));
+	get_qsvar(hm, "jid", jid, sizeof(jid));
 	char cmd[4096];
-	get_qsvar(request_info, "cmd", cmd, sizeof(cmd));
+	get_qsvar(hm, "cmd", cmd, sizeof(cmd));
 	html += std::string("<h2>") + jid + " command result</h2>";
 	html += "<a href=\"/\">Back to main page</a>";
 	html += "</body></html>";
-	print_html(conn, request_info, html);
+	print_html(conn, hm, html);
+}
-void Server::serve_start(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_start(struct mg_connection *conn, struct http_message *hm) {
 	std::string html= get_header() ;
 	char jid[255];
-	get_qsvar(request_info, "jid", jid, sizeof(jid));
+	get_qsvar(hm, "jid", jid, sizeof(jid));
 	start_instances(m_config, jid);
 	html += "<b>" + get_response() + "</b><br/><a href=\"/\">Back to main page</a>";
 	html += "</body></html>";
-	print_html(conn, request_info, html);
+	print_html(conn, hm, html);
+}
-void Server::serve_stop(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_stop(struct mg_connection *conn, struct http_message *hm) {
 	std::string html= get_header();
 	char jid[255];
-	get_qsvar(request_info, "jid", jid, sizeof(jid));
+	get_qsvar(hm, "jid", jid, sizeof(jid));
 	stop_instances(m_config, jid);
 	html += "<b>" + get_response() + "</b><br/><a href=\"/\">Back to main page</a>";
 	html += "</body></html>";
-	print_html(conn, request_info, html);
+	print_html(conn, hm, html);
+}
-void Server::serve_root(struct mg_connection *conn, const struct mg_request_info *request_info) {
+void Server::serve_root(struct mg_connection *conn, struct http_message *hm) {
 	std::vector<std::string> list = show_list(m_config, false);
 	std::string html= get_header() + "<h2>List of instances</h2><table><tr><th>JID<th>Status</th><th>Command</th><th>Run command</th></tr>";
+	}
 	html += "</table></body></html>";
 	print_html(conn, request_info, html);
+}
 void *Server::event_handler(enum mg_event event, struct mg_connection *conn) {
 	const struct mg_request_info *request_info = mg_get_request_info(conn);
 	void *processed = (void *) 0x1;
 	if (event == MG_NEW_REQUEST) {
 		if (!is_authorized(conn, request_info)) {
 			redirect_to(conn, request_info, "/login");
 		} else if (strcmp(request_info->uri, "/authorize") == 0) {
 			authorize(conn, request_info);
 		} else if (strcmp(request_info->uri, "/login") == 0) {
 			serve_login(conn, request_info);
 		} else if (strcmp(request_info->uri, "/") == 0) {
 			serve_root(conn, request_info);
 		} else if (strcmp(request_info->uri, "/onlineusers") == 0) {
 			serve_onlineusers(conn, request_info);
 		} else if (strcmp(request_info->uri, "/cmd") == 0) {
 			serve_cmd(conn, request_info);
 		} else if (strcmp(request_info->uri, "/start") == 0) {
 			serve_start(conn, request_info);
 		} else if (strcmp(request_info->uri, "/stop") == 0) {
 			serve_stop(conn, request_info);
 		} else {
 			// No suitable handler found, mark as not processed. Mongoose will
 			// try to serve the request.
 			processed = NULL;
+		}
+	}
 	else if (event == MG_EVENT_LOG) {
 		// Called by Mongoose's cry()
 		std::cerr << "Mongoose error: " << request_info->log_message << "\n";
+	}
 	else {
 		processed = NULL;
+	}
 	return processed;
 	print_html(conn, hm, html);
+}
 void Server::event_handler(struct mg_connection *conn, int ev, void *p) {
 	struct http_message *hm = (struct http_message *) p;
 	if (ev != MG_EV_HTTP_REQUEST) {
 		return;
+	}
 	if (!is_authorized(conn, hm)) {
 		redirect_to(conn, hm, "/login");
 	} else if (mg_vcmp(&hm->uri, "/authorize") == 0) {
 		authorize(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/login") == 0) {
 		serve_login(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/") == 0) {
 		serve_root(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/onlineusers") == 0) {
 		serve_onlineusers(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/cmd") == 0) {
 		serve_cmd(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/start") == 0) {
 		serve_start(conn, hm);
 	} else if (mg_vcmp(&hm->uri, "/stop") == 0) {
 		serve_stop(conn, hm);
+	}
 	conn->flags |= MG_F_SEND_AND_CLOSE;
+}

spectrum_manager/src/server.h

➞

Show inline comments

@@ @@ -48,30 +48,32 @@ class Server { @@
 		bool start();
-		void *event_handler(enum mg_event event, struct mg_connection *conn);
+		void event_handler(struct mg_connection *nc, int ev, void *p);
 	private:
 		void serve_login(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void serve_root(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void serve_start(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void serve_stop(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void serve_onlineusers(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void serve_cmd(struct mg_connection *conn, const struct mg_request_info *request_info);
 		void print_html(struct mg_connection *conn, const struct mg_request_info *request_info, const std::string &html);
 		void serve_login(struct mg_connection *conn, struct http_message *hm);
 		void serve_root(struct mg_connection *conn, struct http_message *hm);
 		void serve_start(struct mg_connection *conn, struct http_message *hm);
 		void serve_stop(struct mg_connection *conn, struct http_message *hm);
 		void serve_onlineusers(struct mg_connection *conn, struct http_message *hm);
 		void serve_cmd(struct mg_connection *conn, struct http_message *hm);
 		void print_html(struct mg_connection *conn, struct http_message *hm, const std::string &html);
 	private:
 		bool check_password(const char *user, const char *password);
 		session *new_session(const char *user);
-		session *get_session(const struct mg_connection *conn);
+		session *get_session(struct http_message *hm);
-		void authorize(struct mg_connection *conn, const struct mg_request_info *request_info);
+		void authorize(struct mg_connection *conn, struct http_message *hm);
-		bool is_authorized(const struct mg_connection *conn, const struct mg_request_info *request_info);
+		bool is_authorized(const struct mg_connection *conn, struct http_message *hm);
-		void redirect_to(struct mg_connection *conn, const struct mg_request_info *request_info, const char *where);
+		void redirect_to(struct mg_connection *conn, struct http_message *hm, const char *where);
 	private:
 		struct mg_context *ctx;
 		struct mg_mgr m_mgr;
 		struct mg_connection *m_nc;
 		std::map<std::string, session *> sessions;
 		std::string m_user;
 		std::string m_password;

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