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/*
* Copyright (c) 2012-2015 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
/*
* Copyright (c) 2011 Tobias Markmann
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
#include <Swiften/FileTransfer/SOCKS5BytestreamServerManager.h>
#include <boost/smart_ptr/make_shared.hpp>
#include <boost/bind.hpp>
#include <Swiften/FileTransfer/SOCKS5BytestreamServerInitializeRequest.h>
#include <Swiften/Base/foreach.h>
#include <Swiften/Base/Log.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamServer.h>
#include <Swiften/Network/ConnectionServer.h>
#include <Swiften/Network/ConnectionServerFactory.h>
#include <Swiften/Network/NetworkEnvironment.h>
#include <Swiften/Network/NATTraverser.h>
#include <Swiften/Network/NATTraversalGetPublicIPRequest.h>
#include <Swiften/Network/NATTraversalForwardPortRequest.h>
#include <Swiften/Network/NATTraversalRemovePortForwardingRequest.h>
using namespace Swift;
static const int LISTEN_PORTS_BEGIN = 10000;
static const int LISTEN_PORTS_END = 11000;
SOCKS5BytestreamServerManager::SOCKS5BytestreamServerManager(
SOCKS5BytestreamRegistry* bytestreamRegistry,
ConnectionServerFactory* connectionServerFactory,
NetworkEnvironment* networkEnvironment,
NATTraverser* natTraverser) :
bytestreamRegistry(bytestreamRegistry),
connectionServerFactory(connectionServerFactory),
networkEnvironment(networkEnvironment),
natTraverser(natTraverser),
state(Start),
server(NULL) {
}
SOCKS5BytestreamServerManager::~SOCKS5BytestreamServerManager() {
SWIFT_LOG_ASSERT(!connectionServer, warning) << std::endl;
SWIFT_LOG_ASSERT(!getPublicIPRequest, warning) << std::endl;
SWIFT_LOG_ASSERT(!forwardPortRequest, warning) << std::endl;
SWIFT_LOG_ASSERT(state == Start, warning) << std::endl;
if (portMapping && !unforwardPortRequest) {
SWIFT_LOG(warning) << "Port forwarding still alive. Trying to remove it now." << std::endl;
unforwardPortRequest = natTraverser->createRemovePortForwardingRequest(portMapping.get().getLocalPort(), portMapping.get().getPublicPort());
unforwardPortRequest->start();
}
}
boost::shared_ptr<SOCKS5BytestreamServerInitializeRequest> SOCKS5BytestreamServerManager::createInitializeRequest() {
return boost::make_shared<SOCKS5BytestreamServerInitializeRequest>(this);
}
std::vector<HostAddressPort> SOCKS5BytestreamServerManager::getHostAddressPorts() const {
std::vector<HostAddressPort> result;
if (connectionServer) {
std::vector<NetworkInterface> networkInterfaces = networkEnvironment->getNetworkInterfaces();
foreach (const NetworkInterface& networkInterface, networkInterfaces) {
foreach (const HostAddress& address, networkInterface.getAddresses()) {
result.push_back(HostAddressPort(address, connectionServerPort));
}
}
}
return result;
}
std::vector<HostAddressPort> SOCKS5BytestreamServerManager::getAssistedHostAddressPorts() const {
std::vector<HostAddressPort> result;
if (publicAddress && portMapping) {
result.push_back(HostAddressPort(*publicAddress, portMapping->getPublicPort()));
}
return result;
}
bool SOCKS5BytestreamServerManager::isInitialized() const {
return state == Initialized;
}
void SOCKS5BytestreamServerManager::initialize() {
if (state == Start) {
state = Initializing;
// Find a port to listen on
assert(!connectionServer);
int port;
for (port = LISTEN_PORTS_BEGIN; port < LISTEN_PORTS_END; ++port) {
SWIFT_LOG(debug) << "Trying to start server on port " << port << std::endl;
connectionServer = connectionServerFactory->createConnectionServer(HostAddress("0.0.0.0"), port);
boost::optional<ConnectionServer::Error> error = connectionServer->tryStart();
if (!error) {
break;
}
else if (*error != ConnectionServer::Conflict) {
SWIFT_LOG(debug) << "Error starting server" << std::endl;
onInitialized(false);
return;
}
connectionServer.reset();
}
if (!connectionServer) {
SWIFT_LOG(debug) << "Unable to find an open port" << std::endl;
onInitialized(false);
return;
}
SWIFT_LOG(debug) << "Server started succesfully" << std::endl;
connectionServerPort = port;
// Start bytestream server. Should actually happen before the connectionserver is started
// but that doesn't really matter here.
assert(!server);
server = new SOCKS5BytestreamServer(connectionServer, bytestreamRegistry);
server->start();
// Retrieve public addresses
assert(!getPublicIPRequest);
publicAddress = boost::optional<HostAddress>();
if ((getPublicIPRequest = natTraverser->createGetPublicIPRequest())) {
getPublicIPRequest->onResult.connect(
boost::bind(&SOCKS5BytestreamServerManager::handleGetPublicIPResult, this, _1));
getPublicIPRequest->start();
}
// Forward ports
assert(!forwardPortRequest);
portMapping = boost::optional<NATPortMapping>();
if ((forwardPortRequest = natTraverser->createForwardPortRequest(port, port))) {
forwardPortRequest->onResult.connect(
boost::bind(&SOCKS5BytestreamServerManager::handleForwardPortResult, this, _1));
forwardPortRequest->start();
}
}
}
void SOCKS5BytestreamServerManager::stop() {
if (getPublicIPRequest) {
getPublicIPRequest->stop();
getPublicIPRequest.reset();
}
if (forwardPortRequest) {
forwardPortRequest->stop();
forwardPortRequest.reset();
}
if (connectionServer) {
connectionServer->stop();
connectionServer.reset();
}
// remove port forwards
if (portMapping) {
unforwardPortRequest = natTraverser->createRemovePortForwardingRequest(portMapping.get().getLocalPort(), portMapping.get().getPublicPort());
unforwardPortRequest->onResult.connect(boost::bind(&SOCKS5BytestreamServerManager::handleUnforwardPortResult, this, _1));
unforwardPortRequest->start();
}
state = Start;
}
void SOCKS5BytestreamServerManager::handleGetPublicIPResult(boost::optional<HostAddress> address) {
if (address) {
SWIFT_LOG(debug) << "Public IP discovered as " << address.get().toString() << "." << std::endl;
}
else {
SWIFT_LOG(debug) << "No public IP discoverable." << std::endl;
}
publicAddress = address;
getPublicIPRequest->stop();
getPublicIPRequest.reset();
checkInitializeFinished();
}
void SOCKS5BytestreamServerManager::handleForwardPortResult(boost::optional<NATPortMapping> mapping) {
if (mapping) {
SWIFT_LOG(debug) << "Mapping port was successful." << std::endl;
}
else {
SWIFT_LOG(debug) << "Mapping port has failed." << std::endl;
}
portMapping = mapping;
forwardPortRequest->stop();
forwardPortRequest.reset();
checkInitializeFinished();
}
void SOCKS5BytestreamServerManager::handleUnforwardPortResult(boost::optional<bool> result) {
if (result.is_initialized() && result.get()) {
portMapping.reset();
}
else {
SWIFT_LOG(warning) << "Failed to remove port forwarding." << std::endl;
}
unforwardPortRequest.reset();
}
void SOCKS5BytestreamServerManager::checkInitializeFinished() {
assert(state == Initializing);
if (!getPublicIPRequest && !forwardPortRequest) {
state = Initialized;
onInitialized(true);
}
}
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Swift