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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) 2013-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/FileTransfer/LocalJingleTransportCandidateGenerator.h>
#include <memory>
#include <vector>
#include <boost/bind.hpp>
#include <Swiften/Base/Log.h>
#include <Swiften/Elements/JingleS5BTransportPayload.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamProxiesManager.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamServerManager.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamServerPortForwardingUser.h>
#include <Swiften/FileTransfer/SOCKS5BytestreamServerResourceUser.h>
static const unsigned int LOCAL_PREFERENCE = 0;
namespace Swift {
LocalJingleTransportCandidateGenerator::LocalJingleTransportCandidateGenerator(
SOCKS5BytestreamServerManager* s5bServerManager,
SOCKS5BytestreamProxiesManager* s5bProxy,
const JID& ownJID,
IDGenerator* idGenerator,
const FileTransferOptions& options) :
s5bServerManager(s5bServerManager),
s5bProxy(s5bProxy),
ownJID(ownJID),
idGenerator(idGenerator),
triedServerInit_(false),
triedForwarding_(false),
triedProxyDiscovery_(false),
options_(options) {
}
LocalJingleTransportCandidateGenerator::~LocalJingleTransportCandidateGenerator() {
SWIFT_LOG_ASSERT(!s5bServerInitializeRequest, warning) << std::endl;
}
void LocalJingleTransportCandidateGenerator::start() {
assert(!s5bServerInitializeRequest);
if (options_.isDirectAllowed() || options_.isAssistedAllowed()) {
s5bServerResourceUser_ = s5bServerManager->aquireResourceUser();
if (s5bServerResourceUser_->isInitialized()) {
handleS5BServerInitialized(true);
}
else {
s5bServerResourceUser_->onSuccessfulInitialized.connect(boost::bind(&LocalJingleTransportCandidateGenerator::handleS5BServerInitialized, this, _1));
}
} else {
handleS5BServerInitialized(false);
}
if (options_.isProxiedAllowed()) {
s5bProxy->onDiscoveredProxiesChanged.connect(boost::bind(&LocalJingleTransportCandidateGenerator::handleDiscoveredProxiesChanged, this));
if (s5bProxy->getOrDiscoverS5BProxies().is_initialized()) {
handleDiscoveredProxiesChanged();
}
}
}
void LocalJingleTransportCandidateGenerator::stop() {
s5bProxy->onDiscoveredProxiesChanged.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handleDiscoveredProxiesChanged, this));
if (s5bServerPortForwardingUser_) {
s5bServerPortForwardingUser_->onSetup.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handlePortForwardingSetup, this, _1));
s5bServerPortForwardingUser_.reset();
}
if (s5bServerResourceUser_) {
s5bServerResourceUser_->onSuccessfulInitialized.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handleS5BServerInitialized, this, _1));
s5bServerResourceUser_.reset();
}
}
void LocalJingleTransportCandidateGenerator::handleS5BServerInitialized(bool success) {
if (s5bServerResourceUser_) {
s5bServerResourceUser_->onSuccessfulInitialized.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handleS5BServerInitialized, this, _1));
}
triedServerInit_ = true;
if (success) {
if (options_.isAssistedAllowed()) {
// try to setup port forwarding
s5bServerPortForwardingUser_ = s5bServerManager->aquirePortForwardingUser();
s5bServerPortForwardingUser_->onSetup.connect(boost::bind(&LocalJingleTransportCandidateGenerator::handlePortForwardingSetup, this, _1));
if (s5bServerPortForwardingUser_->isForwardingSetup()) {
handlePortForwardingSetup(true);
}
}
}
else {
SWIFT_LOG(warning) << "Unable to start SOCKS5 server" << std::endl;
if (s5bServerResourceUser_) {
s5bServerResourceUser_->onSuccessfulInitialized.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handleS5BServerInitialized, this, _1));
}
s5bServerResourceUser_.reset();
handlePortForwardingSetup(false);
}
checkS5BCandidatesReady();
}
void LocalJingleTransportCandidateGenerator::handlePortForwardingSetup(bool /* success */) {
if (s5bServerPortForwardingUser_) {
s5bServerPortForwardingUser_->onSetup.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handlePortForwardingSetup, this, _1));
}
triedForwarding_ = true;
checkS5BCandidatesReady();
}
void LocalJingleTransportCandidateGenerator::handleDiscoveredProxiesChanged() {
if (s5bProxy) {
s5bProxy->onDiscoveredProxiesChanged.disconnect(boost::bind(&LocalJingleTransportCandidateGenerator::handleDiscoveredProxiesChanged, this));
}
triedProxyDiscovery_ = true;
checkS5BCandidatesReady();
}
void LocalJingleTransportCandidateGenerator::checkS5BCandidatesReady() {
if ((!options_.isDirectAllowed() || (options_.isDirectAllowed() && triedServerInit_)) &&
(!options_.isProxiedAllowed() || (options_.isProxiedAllowed() && triedProxyDiscovery_)) &&
(!options_.isAssistedAllowed() || (options_.isAssistedAllowed() && triedForwarding_))) {
emitOnLocalTransportCandidatesGenerated();
}
}
void LocalJingleTransportCandidateGenerator::emitOnLocalTransportCandidatesGenerated() {
std::vector<JingleS5BTransportPayload::Candidate> candidates;
if (options_.isDirectAllowed()) {
// get direct candidates
std::vector<HostAddressPort> directCandidates = s5bServerManager->getHostAddressPorts();
for(auto&& addressPort : directCandidates) {
if (addressPort.getAddress().getRawAddress().is_v6() &&
addressPort.getAddress().getRawAddress().to_v6().is_link_local()) {
continue;
}
JingleS5BTransportPayload::Candidate candidate;
candidate.type = JingleS5BTransportPayload::Candidate::DirectType;
candidate.jid = ownJID;
candidate.hostPort = addressPort;
candidate.priority = 65536 * 126 + LOCAL_PREFERENCE;
candidate.cid = idGenerator->generateID();
candidates.push_back(candidate);
}
}
if (options_.isAssistedAllowed()) {
// get assissted candidates
std::vector<HostAddressPort> assisstedCandidates = s5bServerManager->getAssistedHostAddressPorts();
for (auto&& addressPort : assisstedCandidates) {
JingleS5BTransportPayload::Candidate candidate;
candidate.type = JingleS5BTransportPayload::Candidate::AssistedType;
candidate.jid = ownJID;
candidate.hostPort = addressPort;
candidate.priority = 65536 * 120 + LOCAL_PREFERENCE;
candidate.cid = idGenerator->generateID();
candidates.push_back(candidate);
}
}
if (options_.isProxiedAllowed() && s5bProxy->getOrDiscoverS5BProxies().is_initialized()) {
for (auto&& proxy : s5bProxy->getOrDiscoverS5BProxies().get()) {
if (proxy->getStreamHost()) { // FIXME: Added this test, because there were cases where this wasn't initialized. Investigate this. (Remko)
JingleS5BTransportPayload::Candidate candidate;
candidate.type = JingleS5BTransportPayload::Candidate::ProxyType;
candidate.jid = (*proxy->getStreamHost()).jid;
auto address = HostAddress::fromString((*proxy->getStreamHost()).host);
if (address) {
candidate.hostPort = HostAddressPort(address.get(), (*proxy->getStreamHost()).port);
candidate.priority = 65536 * 10 + LOCAL_PREFERENCE;
candidate.cid = idGenerator->generateID();
candidates.push_back(candidate);
}
}
}
}
onLocalTransportCandidatesGenerated(candidates);
}
}
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Swift