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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/protocol/jingle_session_manager.h"
#include "base/bind.h"
#include "remoting/jingle_glue/iq_sender.h"
#include "remoting/jingle_glue/jingle_info_request.h"
#include "remoting/jingle_glue/signal_strategy.h"
#include "remoting/protocol/authenticator.h"
#include "remoting/protocol/content_description.h"
#include "remoting/protocol/jingle_messages.h"
#include "remoting/protocol/jingle_session.h"
#include "remoting/protocol/transport.h"
#include "remoting/protocol/transport_config.h"
#include "third_party/libjingle/source/talk/base/socketaddress.h"
#include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
using buzz::QName;
namespace remoting {
namespace protocol {
JingleSessionManager::JingleSessionManager(
scoped_ptr<TransportFactory> transport_factory,
bool fetch_stun_relay_config)
: transport_factory_(transport_factory.Pass()),
fetch_stun_relay_config_(fetch_stun_relay_config),
signal_strategy_(NULL),
listener_(NULL),
ready_(false) {
}
JingleSessionManager::~JingleSessionManager() {
Close();
}
void JingleSessionManager::Init(
SignalStrategy* signal_strategy,
SessionManager::Listener* listener) {
listener_ = listener;
signal_strategy_ = signal_strategy;
iq_sender_.reset(new IqSender(signal_strategy_));
signal_strategy_->AddListener(this);
OnSignalStrategyStateChange(signal_strategy_->GetState());
}
void JingleSessionManager::OnJingleInfo(
const std::string& relay_token,
const std::vector<std::string>& relay_hosts,
const std::vector<talk_base::SocketAddress>& stun_hosts) {
DCHECK(CalledOnValidThread());
// TODO(sergeyu): Add support for multiple STUN/relay servers when
// it's implemented in libjingle and P2P Transport API.
TransportConfig config;
config.stun_server = stun_hosts[0].ToString();
config.relay_server = relay_hosts[0];
config.relay_token = relay_token;
transport_factory_->SetTransportConfig(config);
VLOG(1) << "STUN server: " << config.stun_server
<< " Relay server: " << config.relay_server
<< " Relay token: " << config.relay_token;
if (!ready_) {
ready_ = true;
listener_->OnSessionManagerReady();
}
}
scoped_ptr<Session> JingleSessionManager::Connect(
const std::string& host_jid,
scoped_ptr<Authenticator> authenticator,
scoped_ptr<CandidateSessionConfig> config) {
scoped_ptr<JingleSession> session(new JingleSession(this));
session->StartConnection(host_jid, authenticator.Pass(), config.Pass());
sessions_[session->session_id_] = session.get();
return session.PassAs<Session>();
}
void JingleSessionManager::Close() {
DCHECK(CalledOnValidThread());
// Close() can be called only after all sessions are destroyed.
DCHECK(sessions_.empty());
listener_ = NULL;
jingle_info_request_.reset();
if (signal_strategy_) {
signal_strategy_->RemoveListener(this);
signal_strategy_ = NULL;
}
}
void JingleSessionManager::set_authenticator_factory(
scoped_ptr<AuthenticatorFactory> authenticator_factory) {
DCHECK(CalledOnValidThread());
authenticator_factory_ = authenticator_factory.Pass();
}
void JingleSessionManager::OnSignalStrategyStateChange(
SignalStrategy::State state) {
if (state == SignalStrategy::CONNECTED) {
// Request STUN/Relay info if necessary.
if (fetch_stun_relay_config_) {
jingle_info_request_.reset(new JingleInfoRequest(signal_strategy_));
jingle_info_request_->Send(base::Bind(&JingleSessionManager::OnJingleInfo,
base::Unretained(this)));
} else if (!ready_) {
ready_ = true;
listener_->OnSessionManagerReady();
}
}
}
bool JingleSessionManager::OnSignalStrategyIncomingStanza(
const buzz::XmlElement* stanza) {
if (!JingleMessage::IsJingleMessage(stanza))
return false;
JingleMessage message;
std::string error;
if (!message.ParseXml(stanza, &error)) {
SendReply(stanza, JingleMessageReply::BAD_REQUEST);
return true;
}
if (message.action == JingleMessage::SESSION_INITIATE) {
// Description must be present in session-initiate messages.
DCHECK(message.description.get());
SendReply(stanza, JingleMessageReply::NONE);
scoped_ptr<Authenticator> authenticator =
authenticator_factory_->CreateAuthenticator(
signal_strategy_->GetLocalJid(), message.from,
message.description->authenticator_message());
JingleSession* session = new JingleSession(this);
session->InitializeIncomingConnection(message, authenticator.Pass());
sessions_[session->session_id_] = session;
IncomingSessionResponse response = SessionManager::DECLINE;
listener_->OnIncomingSession(session, &response);
if (response == SessionManager::ACCEPT) {
session->AcceptIncomingConnection(message);
} else {
ErrorCode error;
switch (response) {
case INCOMPATIBLE:
error = INCOMPATIBLE_PROTOCOL;
break;
case OVERLOAD:
error = HOST_OVERLOAD;
break;
case DECLINE:
error = SESSION_REJECTED;
break;
default:
NOTREACHED();
error = SESSION_REJECTED;
}
session->CloseInternal(error);
delete session;
DCHECK(sessions_.find(message.sid) == sessions_.end());
}
return true;
}
SessionsMap::iterator it = sessions_.find(message.sid);
if (it == sessions_.end()) {
SendReply(stanza, JingleMessageReply::INVALID_SID);
return true;
}
it->second->OnIncomingMessage(message, base::Bind(
&JingleSessionManager::SendReply, base::Unretained(this), stanza));
return true;
}
void JingleSessionManager::SendReply(const buzz::XmlElement* original_stanza,
JingleMessageReply::ErrorType error) {
signal_strategy_->SendStanza(
JingleMessageReply(error).ToXml(original_stanza));
}
void JingleSessionManager::SessionDestroyed(JingleSession* session) {
sessions_.erase(session->session_id_);
}
} // namespace protocol
} // namespace remoting
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