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/*
* Copyright (c) 2013-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/FileTransfer/JingleFileTransfer.h>
#include <Swiften/Base/Log.h>
#include <Swiften/Crypto/CryptoProvider.h>
#include <Swiften/FileTransfer/FileTransferTransporter.h>
#include <Swiften/JID/JID.h>
#include <Swiften/Jingle/JingleSession.h>
#include <Swiften/StringCodecs/Hexify.h>
using namespace Swift;
JingleFileTransfer::JingleFileTransfer(
std::shared_ptr<JingleSession> session,
const JID& target,
FileTransferTransporterFactory* transporterFactory) :
session(session),
target(target),
transporterFactory(transporterFactory),
transporter(nullptr),
ourCandidateSelectFinished(false),
theirCandidateSelectFinished(false) {
session->addListener(this);
}
JingleFileTransfer::~JingleFileTransfer() {
session->removeListener(this);
}
void JingleFileTransfer::fillCandidateMap(CandidateMap& map, const std::vector<JingleS5BTransportPayload::Candidate>& candidates) {
map.clear();
for (auto&& candidate : candidates) {
map[candidate.cid] = candidate;
}
}
/*
std::string JingleFileTransfer::getS5BDstAddr(const JID& requester, const JID& target) const {
return Hexify::hexify(crypto->getSHA1Hash(
createSafeByteArray(s5bSessionID + requester.toString() + target.toString())));
}
*/
const JID& JingleFileTransfer::getInitiator() const {
return session->getInitiator();
}
const JID& JingleFileTransfer::getResponder() const {
return target;
}
FileTransfer::State::Type JingleFileTransfer::getExternalFinishedState(JinglePayload::Reason::Type reason) {
if (reason == JinglePayload::Reason::Cancel || reason == JinglePayload::Reason::Decline) {
return FileTransfer::State::Canceled;
}
else if (reason == JinglePayload::Reason::Success) {
return FileTransfer::State::Finished;
}
else {
return FileTransfer::State::Failed;
}
}
boost::optional<FileTransferError> JingleFileTransfer::getFileTransferError(JinglePayload::Reason::Type reason) {
if (reason == JinglePayload::Reason::Success) {
return boost::optional<FileTransferError>();
}
else {
return boost::optional<FileTransferError>(FileTransferError::UnknownError);
}
}
void JingleFileTransfer::handleRemoteTransportCandidateSelectFinished(
const std::string& s5bSessionID, const boost::optional<JingleS5BTransportPayload::Candidate>& candidate) {
SWIFT_LOG(debug) << std::endl;
ourCandidateChoice = candidate;
ourCandidateSelectFinished = true;
JingleS5BTransportPayload::ref s5bPayload = std::make_shared<JingleS5BTransportPayload>();
s5bPayload->setSessionID(s5bSessionID);
if (candidate) {
s5bPayload->setCandidateUsed(candidate->cid);
}
else {
s5bPayload->setCandidateError(true);
}
candidateSelectRequestID = session->sendTransportInfo(getContentID(), s5bPayload);
decideOnCandidates();
}
// decide on candidates according to http://xmpp.org/extensions/xep-0260.html#complete
void JingleFileTransfer::decideOnCandidates() {
SWIFT_LOG(debug) << std::endl;
if (!ourCandidateSelectFinished || !theirCandidateSelectFinished) {
SWIFT_LOG(debug) << "Can't make a decision yet!" << std::endl;
return;
}
if (!ourCandidateChoice && !theirCandidateChoice) {
SWIFT_LOG(debug) << "No candidates succeeded." << std::endl;
fallback();
}
else if (ourCandidateChoice && !theirCandidateChoice) {
SWIFT_LOG(debug) << "Start transfer using remote candidate: " << ourCandidateChoice.get().cid << "." << std::endl;
startTransferViaRemoteCandidate();
}
else if (theirCandidateChoice && !ourCandidateChoice) {
SWIFT_LOG(debug) << "Start transfer using local candidate: " << theirCandidateChoice.get().cid << "." << std::endl;
startTransferViaLocalCandidate();
}
else {
SWIFT_LOG(debug) << "Choosing between candidates "
<< ourCandidateChoice->cid << "(" << ourCandidateChoice->priority << ")" << " and "
<< theirCandidateChoice->cid << "(" << theirCandidateChoice->priority << ")" << std::endl;
if (ourCandidateChoice->priority > theirCandidateChoice->priority) {
SWIFT_LOG(debug) << "Start transfer using remote candidate: " << ourCandidateChoice.get().cid << "." << std::endl;
startTransferViaRemoteCandidate();
}
else if (ourCandidateChoice->priority < theirCandidateChoice->priority) {
SWIFT_LOG(debug) << "Start transfer using local candidate:" << theirCandidateChoice.get().cid << "." << std::endl;
startTransferViaLocalCandidate();
}
else {
if (hasPriorityOnCandidateTie()) {
SWIFT_LOG(debug) << "Start transfer using remote candidate: " << ourCandidateChoice.get().cid << std::endl;
startTransferViaRemoteCandidate();
}
else {
SWIFT_LOG(debug) << "Start transfer using local candidate: " << theirCandidateChoice.get().cid << std::endl;
startTransferViaLocalCandidate();
}
}
}
}
void JingleFileTransfer::handleProxyActivateFinished(
const std::string& s5bSessionID, ErrorPayload::ref error) {
SWIFT_LOG(debug) << std::endl;
if (!isWaitingForLocalProxyActivate()) { SWIFT_LOG(warning) << "Incorrect state" << std::endl; return; }
if (error) {
SWIFT_LOG(debug) << "Error activating proxy" << std::endl;
JingleS5BTransportPayload::ref proxyError = std::make_shared<JingleS5BTransportPayload>();
proxyError->setSessionID(s5bSessionID);
proxyError->setProxyError(true);
session->sendTransportInfo(getContentID(), proxyError);
fallback();
}
else {
JingleS5BTransportPayload::ref proxyActivate = std::make_shared<JingleS5BTransportPayload>();
proxyActivate->setSessionID(s5bSessionID);
proxyActivate->setActivated(theirCandidateChoice->cid);
session->sendTransportInfo(getContentID(), proxyActivate);
startTransferring(createLocalCandidateSession());
}
}
void JingleFileTransfer::handleTransportInfoReceived(
const JingleContentID& /* contentID */, JingleTransportPayload::ref transport) {
SWIFT_LOG(debug) << std::endl;
if (JingleS5BTransportPayload::ref s5bPayload = std::dynamic_pointer_cast<JingleS5BTransportPayload>(transport)) {
if (s5bPayload->hasCandidateError() || !s5bPayload->getCandidateUsed().empty()) {
SWIFT_LOG(debug) << "Received candidate decision from peer" << std::endl;
if (!isTryingCandidates()) { SWIFT_LOG(warning) << "Incorrect state" << std::endl; return; }
theirCandidateSelectFinished = true;
if (!s5bPayload->hasCandidateError()) {
auto theirCandidate = localCandidates.find(s5bPayload->getCandidateUsed());
if (theirCandidate == localCandidates.end()) {
SWIFT_LOG(warning) << "Got invalid candidate" << std::endl;
terminate(JinglePayload::Reason::GeneralError);
return;
}
theirCandidateChoice = theirCandidate->second;
}
decideOnCandidates();
}
else if (!s5bPayload->getActivated().empty()) {
SWIFT_LOG(debug) << "Received peer activate from peer" << std::endl;
if (!isWaitingForPeerProxyActivate()) { SWIFT_LOG(warning) << "Incorrect state" << std::endl; return; }
if (ourCandidateChoice->cid == s5bPayload->getActivated()) {
startTransferring(createRemoteCandidateSession());
}
else {
SWIFT_LOG(warning) << "ourCandidateChoice doesn't match activated proxy candidate!" << std::endl;
terminate(JinglePayload::Reason::GeneralError);
}
}
else if (s5bPayload->hasProxyError()) {
SWIFT_LOG(debug) << "Received proxy error. Trying to fall back to IBB." << std::endl;
fallback();
}
else {
SWIFT_LOG(debug) << "Ignoring unknown info" << std::endl;
}
}
else {
SWIFT_LOG(debug) << "Ignoring unknown info" << std::endl;
}
}
void JingleFileTransfer::setTransporter(FileTransferTransporter* transporter) {
SWIFT_LOG_ASSERT(!this->transporter, error);
this->transporter = transporter;
localTransportCandidatesGeneratedConnection = transporter->onLocalCandidatesGenerated.connect(
boost::bind(&JingleFileTransfer::handleLocalTransportCandidatesGenerated, this, _1, _2, _3));
remoteTransportCandidateSelectFinishedConnection = transporter->onRemoteCandidateSelectFinished.connect(
boost::bind(&JingleFileTransfer::handleRemoteTransportCandidateSelectFinished, this, _1, _2));
proxyActivatedConnection = transporter->onProxyActivated.connect(
boost::bind(&JingleFileTransfer::handleProxyActivateFinished, this, _1, _2));
}
void JingleFileTransfer::removeTransporter() {
if (transporter) {
localTransportCandidatesGeneratedConnection.release();
remoteTransportCandidateSelectFinishedConnection.release();
proxyActivatedConnection.release();
delete transporter;
transporter = nullptr;
}
}
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Swift