}

	free(p);

	return (unsigned long) pid;

#endif

}

#ifndef _WIN32

static void SigCatcher(int n) {

	pid_t result;

	int status;

	// Read exit code from all children to not have zombies arround

	// WARNING: Do not put LOG4CXX_ here, because it can lead to deadlock

	while ((result = waitpid(0, &status, WNOHANG)) > 0) {

		if (result != 0) {

			if (WIFEXITED(status)) {

				if (WEXITSTATUS(status) != 0) {

// 					LOG4CXX_ERROR(logger, "Backend can not be started, exit_code=" << WEXITSTATUS(status));

				}

			}

			else {

// 				LOG4CXX_ERROR(logger, "Backend can not be started");

			}

		}

	}

}

#endif

static void handleBuddyPayload(LocalBuddy *buddy, const pbnetwork::Buddy &payload) {

	buddy->setName(payload.buddyname());

	// Set alias only if it's not empty. Backends are allowed to send empty alias if it has

	// not changed.

	if (!payload.alias().empty()) {

		buddy->setAlias(payload.alias());

	}

	// Change groups if it's not empty. The same as above...

	std::vector<std::string> groups;

	for (int i = 0; i < payload.group_size(); i++) {

		groups.push_back(payload.group(i));

	}

	if (!groups.empty()) {

		buddy->setGroups(groups);

	}

	buddy->setStatus(Swift::StatusShow((Swift::StatusShow::Type) payload.status()), payload.statusmessage());

	buddy->setIconHash(payload.iconhash());

	buddy->setBlocked(payload.blocked());

}

NetworkPluginServer::NetworkPluginServer(Component *component, Config *config, UserManager *userManager, FileTransferManager *ftManager) {

	m_ftManager = ftManager;

	m_userManager = userManager;

	m_config = config;

	m_component = component;

	m_isNextLongRun = false;

	m_component->m_factory = new NetworkFactory(this);

	m_userManager->onUserCreated.connect(boost::bind(&NetworkPluginServer::handleUserCreated, this, _1));

	m_userManager->onUserDestroyed.connect(boost::bind(&NetworkPluginServer::handleUserDestroyed, this, _1));

	m_pingTimer = component->getNetworkFactories()->getTimerFactory()->createTimer(20000);

	m_pingTimer->onTick.connect(boost::bind(&NetworkPluginServer::pingTimeout, this));

	m_pingTimer->start();

	if (CONFIG_INT(m_config, "service.memory_collector_time") != 0) {

		m_collectTimer = component->getNetworkFactories()->getTimerFactory()->createTimer(CONFIG_INT(m_config, "service.memory_collector_time"));

		m_collectTimer->onTick.connect(boost::bind(&NetworkPluginServer::collectBackend, this));

		m_collectTimer->start();

	}

	m_vcardResponder = new VCardResponder(component->getIQRouter(), component->getNetworkFactories(), userManager);

	m_vcardResponder->onVCardRequired.connect(boost::bind(&NetworkPluginServer::handleVCardRequired, this, _1, _2, _3));

	m_vcardResponder->onVCardUpdated.connect(boost::bind(&NetworkPluginServer::handleVCardUpdated, this, _1, _2));

	m_vcardResponder->start();

	m_rosterResponder = new RosterResponder(component->getIQRouter(), userManager);

	m_rosterResponder->onBuddyAdded.connect(boost::bind(&NetworkPluginServer::handleBuddyAdded, this, _1, _2));

	m_rosterResponder->onBuddyRemoved.connect(boost::bind(&NetworkPluginServer::handleBuddyRemoved, this, _1));

	m_rosterResponder->onBuddyUpdated.connect(boost::bind(&NetworkPluginServer::handleBuddyUpdated, this, _1, _2));

	m_rosterResponder->start();

	m_blockResponder = new BlockResponder(component->getIQRouter(), userManager);

	m_blockResponder->onBlockToggled.connect(boost::bind(&NetworkPluginServer::handleBlockToggled, this, _1));

	m_blockResponder->start();

	m_server = component->getNetworkFactories()->getConnectionServerFactory()->createConnectionServer(Swift::HostAddress(CONFIG_STRING(m_config, "service.backend_host")), boost::lexical_cast<int>(CONFIG_STRING(m_config, "service.backend_port")));

	m_server->onNewConnection.connect(boost::bind(&NetworkPluginServer::handleNewClientConnection, this, _1));

	m_server->start();

	LOG4CXX_INFO(logger, "Listening on host " << CONFIG_STRING(m_config, "service.backend_host") << " port " << CONFIG_STRING(m_config, "service.backend_port"));

#ifndef _WIN32

	signal(SIGCHLD, SigCatcher);

#endif

	exec_(CONFIG_STRING(m_config, "service.backend"), CONFIG_STRING(m_config, "service.backend_host").c_str(), CONFIG_STRING(m_config, "service.backend_port").c_str(), m_config->getConfigFile().c_str());

}

NetworkPluginServer::~NetworkPluginServer() {

	for (std::list<Backend *>::const_iterator it = m_clients.begin(); it != m_clients.end(); it++) {

		LOG4CXX_INFO(logger, "Stopping backend " << *it);

		std::string message;

		pbnetwork::WrapperMessage wrap;

		wrap.set_type(pbnetwork::WrapperMessage_Type_TYPE_EXIT);

		wrap.SerializeToString(&message);

		Backend *c = (Backend *) *it;

		send(c->connection, message);

	}

	m_pingTimer->stop();

	m_server->stop();

	m_server.reset();

	delete m_component->m_factory;

	delete m_vcardResponder;

	delete m_rosterResponder;

	delete m_blockResponder;

}

void NetworkPluginServer::handleNewClientConnection(boost::shared_ptr<Swift::Connection> c) {

	// Create new Backend instance

	Backend *client = new Backend;

	client->pongReceived = -1;

	client->connection = c;

	client->res = 0;

	client->init_res = 0;

	client->shared = 0;

	client->willDie = 0;

	// Backend does not accept new clients automatically if it's long-running

	client->acceptUsers = !m_isNextLongRun;

	client->longRun = m_isNextLongRun;

	LOG4CXX_INFO(logger, "New" + (client->longRun ? std::string(" long-running") : "") +  " backend " << client << " connected. Current backend count=" << (m_clients.size() + 1));

	if (m_clients.size() == 0) {

		// first backend connected, start the server, we're ready.

		m_component->start();

	}

	m_clients.push_front(client);

	c->onDisconnected.connect(boost::bind(&NetworkPluginServer::handleSessionFinished, this, client));

	c->onDataRead.connect(boost::bind(&NetworkPluginServer::handleDataRead, this, client, _1));

	sendPing(client);

	// sendPing sets pongReceived to 0, but we want to have it -1 to ignore this backend

	// in first ::pingTimeout call, because it can be called right after this function

	// and backend wouldn't have any time to response to ping.

	client->pongReceived = -1;

	// some users are in queue waiting for this backend

	while(!m_waitingUsers.empty()) {

		// There's no new backend, so stop associating users and wait for new backend,

		// which has been already spawned in getFreeClient() call.

		if (getFreeClient() == NULL)

			break;

		User *u = m_waitingUsers.front();

		m_waitingUsers.pop_front();

		LOG4CXX_INFO(logger, "Associating " << u->getJID().toString() << " with this backend");

		// associate backend with user

		handleUserCreated(u);

		// connect user if it's ready

		if (u->isReadyToConnect()) {

			handleUserReadyToConnect(u);

		}

	}

}

void NetworkPluginServer::handleSessionFinished(Backend *c) {

	LOG4CXX_INFO(logger, "Backend " << c << " disconnected. Current backend count=" << (m_clients.size() - 1));

	// This backend will do, so we can't reconnect users to it in User::handleDisconnected call

	c->willDie = true;

	// If there are users associated with this backend, it must have crashed, so print error output

	// and disconnect users

	for (std::list<User *>::const_iterator it = c->users.begin(); it != c->users.end(); it++) {

		LOG4CXX_ERROR(logger, "Backend " << c << " disconnected (probably crashed) with active user " << (*it)->getJID().toString());

		(*it)->setData(NULL);

		(*it)->handleDisconnected("Internal Server Error, please reconnect.");

	}

	std::string message;

	pbnetwork::WrapperMessage wrap;

	wrap.set_type(pbnetwork::WrapperMessage_Type_TYPE_EXIT);

	wrap.SerializeToString(&message);