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/*
* Copyright (c) 2011 Tobias Markmann
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
/*
* Copyright (c) 2015-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/FileTransfer/SOCKS5BytestreamProxiesManager.h>
#include <memory>
#include <boost/bind.hpp>
#include <Swiften/Base/Log.h>
#include <Swiften/Base/foreach.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamClientSession.h>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Network/DomainNameAddressQuery.h>
#include <Swiften/Network/DomainNameResolveError.h>
#include <Swiften/Network/DomainNameResolver.h>
#include <Swiften/Network/TimerFactory.h>
namespace Swift {
SOCKS5BytestreamProxiesManager::SOCKS5BytestreamProxiesManager(ConnectionFactory *connFactory, TimerFactory *timeFactory, DomainNameResolver* resolver, IQRouter* iqRouter, const JID& serviceRoot) : connectionFactory_(connFactory), timerFactory_(timeFactory), resolver_(resolver), iqRouter_(iqRouter), serviceRoot_(serviceRoot) {
}
SOCKS5BytestreamProxiesManager::~SOCKS5BytestreamProxiesManager() {
if (proxyFinder_) {
proxyFinder_->stop();
}
foreach (const ProxySessionsMap::value_type& sessionsForID, proxySessions_) {
foreach (const ProxyJIDClientSessionVector::value_type& session, sessionsForID.second) {
session.second->onSessionReady.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionReady, this,sessionsForID.first, session.first, session.second, _1));
session.second->onFinished.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionFinished, this, sessionsForID.first, session.first, session.second, _1));
}
}
}
void SOCKS5BytestreamProxiesManager::addS5BProxy(S5BProxyRequest::ref proxy) {
if (proxy) {
SWIFT_LOG_ASSERT(HostAddress(proxy->getStreamHost().get().host).isValid(), warning) << std::endl;
if (!localS5BProxies_) {
localS5BProxies_ = std::vector<S5BProxyRequest::ref>();
}
localS5BProxies_->push_back(proxy);
}
}
const boost::optional<std::vector<S5BProxyRequest::ref> >& SOCKS5BytestreamProxiesManager::getOrDiscoverS5BProxies() {
if (!localS5BProxies_ && !proxyFinder_) {
queryForProxies();
}
return localS5BProxies_;
}
void SOCKS5BytestreamProxiesManager::connectToProxies(const std::string& sessionID) {
SWIFT_LOG(debug) << "session ID: " << sessionID << std::endl;
ProxyJIDClientSessionVector clientSessions;
if (localS5BProxies_) {
foreach(S5BProxyRequest::ref proxy, localS5BProxies_.get()) {
std::shared_ptr<Connection> conn = connectionFactory_->createConnection();
HostAddressPort addressPort = HostAddressPort(proxy->getStreamHost().get().host, proxy->getStreamHost().get().port);
SWIFT_LOG_ASSERT(addressPort.isValid(), warning) << std::endl;
std::shared_ptr<SOCKS5BytestreamClientSession> session = std::make_shared<SOCKS5BytestreamClientSession>(conn, addressPort, sessionID, timerFactory_);
JID proxyJid = proxy->getStreamHost().get().jid;
clientSessions.push_back(std::pair<JID, std::shared_ptr<SOCKS5BytestreamClientSession> >(proxyJid, session));
session->onSessionReady.connect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionReady, this,sessionID, proxyJid, session, _1));
session->onFinished.connect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionFinished, this, sessionID, proxyJid, session, _1));
session->start();
}
}
proxySessions_[sessionID] = clientSessions;
}
std::shared_ptr<SOCKS5BytestreamClientSession> SOCKS5BytestreamProxiesManager::getProxySessionAndCloseOthers(const JID& proxyJID, const std::string& sessionID) {
// checking parameters
if (proxySessions_.find(sessionID) == proxySessions_.end()) {
return std::shared_ptr<SOCKS5BytestreamClientSession>();
}
// get active session
std::shared_ptr<SOCKS5BytestreamClientSession> activeSession;
for (ProxyJIDClientSessionVector::iterator i = proxySessions_[sessionID].begin(); i != proxySessions_[sessionID].end(); i++) {
i->second->onSessionReady.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionReady, this,sessionID, proxyJID, i->second, _1));
i->second->onFinished.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionFinished, this, sessionID, proxyJID, i->second, _1));
if (i->first == proxyJID && !activeSession) {
activeSession = i->second;
}
else {
i->second->stop();
}
}
proxySessions_.erase(sessionID);
return activeSession;
}
std::shared_ptr<SOCKS5BytestreamClientSession> SOCKS5BytestreamProxiesManager::createSOCKS5BytestreamClientSession(HostAddressPort addressPort, const std::string& destAddr) {
SOCKS5BytestreamClientSession::ref connection = std::make_shared<SOCKS5BytestreamClientSession>(connectionFactory_->createConnection(), addressPort, destAddr, timerFactory_);
return connection;
}
void SOCKS5BytestreamProxiesManager::handleProxiesFound(std::vector<S5BProxyRequest::ref> proxyHosts) {
proxyFinder_->onProxiesFound.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxiesFound, this, _1));
foreach(S5BProxyRequest::ref proxy, proxyHosts) {
if (proxy) {
if (HostAddress(proxy->getStreamHost().get().host).isValid()) {
addS5BProxy(proxy);
onDiscoveredProxiesChanged();
}
else {
DomainNameAddressQuery::ref resolveRequest = resolver_->createAddressQuery(proxy->getStreamHost().get().host);
resolveRequest->onResult.connect(boost::bind(&SOCKS5BytestreamProxiesManager::handleNameLookupResult, this, _1, _2, proxy));
resolveRequest->run();
}
}
}
proxyFinder_->stop();
proxyFinder_.reset();
if (proxyHosts.empty()) {
onDiscoveredProxiesChanged();
}
}
void SOCKS5BytestreamProxiesManager::handleNameLookupResult(const std::vector<HostAddress>& addresses, boost::optional<DomainNameResolveError> error, S5BProxyRequest::ref proxy) {
if (error) {
onDiscoveredProxiesChanged();
}
else {
if (addresses.empty()) {
SWIFT_LOG(warning) << "S5B proxy hostname does not resolve." << std::endl;
}
else {
// generate proxy per returned address
foreach (const HostAddress& address, addresses) {
S5BProxyRequest::StreamHost streamHost = proxy->getStreamHost().get();
S5BProxyRequest::ref proxyForAddress = std::make_shared<S5BProxyRequest>(*proxy);
streamHost.host = address.toString();
proxyForAddress->setStreamHost(streamHost);
addS5BProxy(proxyForAddress);
}
}
onDiscoveredProxiesChanged();
}
}
void SOCKS5BytestreamProxiesManager::queryForProxies() {
proxyFinder_ = std::make_shared<SOCKS5BytestreamProxyFinder>(serviceRoot_, iqRouter_);
proxyFinder_->onProxiesFound.connect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxiesFound, this, _1));
proxyFinder_->start();
}
void SOCKS5BytestreamProxiesManager::handleProxySessionReady(const std::string& sessionID, const JID& jid, std::shared_ptr<SOCKS5BytestreamClientSession> session, bool error) {
session->onSessionReady.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionReady, this, boost::cref(sessionID), boost::cref(jid), session, _1));
if (!error) {
// The SOCKS5 bytestream session to the proxy succeeded; stop and remove other sessions.
if (proxySessions_.find(sessionID) != proxySessions_.end()) {
for (ProxyJIDClientSessionVector::iterator i = proxySessions_[sessionID].begin(); i != proxySessions_[sessionID].end();) {
if ((i->first == jid) && (i->second != session)) {
i->second->stop();
i = proxySessions_[sessionID].erase(i);
}
else {
i++;
}
}
}
}
}
void SOCKS5BytestreamProxiesManager::handleProxySessionFinished(const std::string& sessionID, const JID& jid, std::shared_ptr<SOCKS5BytestreamClientSession> session, boost::optional<FileTransferError> error) {
session->onFinished.disconnect(boost::bind(&SOCKS5BytestreamProxiesManager::handleProxySessionFinished, this, sessionID, jid, session, _1));
if (error.is_initialized()) {
// The SOCKS5 bytestream session to the proxy failed; remove it.
if (proxySessions_.find(sessionID) != proxySessions_.end()) {
for (ProxyJIDClientSessionVector::iterator i = proxySessions_[sessionID].begin(); i != proxySessions_[sessionID].end();) {
if ((i->first == jid) && (i->second == session)) {
i->second->stop();
i = proxySessions_[sessionID].erase(i);
break;
}
else {
i++;
}
}
}
}
}
}
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Swift