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// Copyright (c) 2011 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 "content/renderer/p2p/p2p_transport_impl.h"
#include "base/values.h"
#include "content/common/json_value_serializer.h"
#include "content/renderer/p2p/ipc_network_manager.h"
#include "content/renderer/p2p/ipc_socket_factory.h"
#include "content/renderer/render_view.h"
#include "jingle/glue/channel_socket_adapter.h"
#include "jingle/glue/pseudotcp_adapter.h"
#include "jingle/glue/thread_wrapper.h"
#include "net/base/net_errors.h"
#include "third_party/libjingle/source/talk/p2p/base/p2ptransportchannel.h"
#include "third_party/libjingle/source/talk/p2p/client/basicportallocator.h"
P2PTransportImpl::P2PTransportImpl(
talk_base::NetworkManager* network_manager,
talk_base::PacketSocketFactory* socket_factory)
: event_handler_(NULL),
state_(STATE_NONE),
network_manager_(network_manager),
socket_factory_(socket_factory),
ALLOW_THIS_IN_INITIALIZER_LIST(connect_callback_(
this, &P2PTransportImpl::OnTcpConnected)) {
}
P2PTransportImpl::P2PTransportImpl(P2PSocketDispatcher* socket_dispatcher)
: event_handler_(NULL),
state_(STATE_NONE),
network_manager_(new IpcNetworkManager(socket_dispatcher)),
socket_factory_(new IpcPacketSocketFactory(socket_dispatcher)),
ALLOW_THIS_IN_INITIALIZER_LIST(connect_callback_(
this, &P2PTransportImpl::OnTcpConnected)) {
}
P2PTransportImpl::~P2PTransportImpl() {
}
bool P2PTransportImpl::Init(const std::string& name,
Protocol protocol,
const std::string& config,
EventHandler* event_handler) {
DCHECK(event_handler);
// Before proceeding, ensure we have libjingle thread wrapper for
// the current thread.
jingle_glue::JingleThreadWrapper::EnsureForCurrentThread();
name_ = name;
event_handler_ = event_handler;
// TODO(sergeyu): Implement PortAllocator that can parse |config|
// and use it here instead of BasicPortAllocator.
allocator_.reset(new cricket::BasicPortAllocator(
network_manager_.get(), socket_factory_.get()));
DCHECK(!channel_.get());
channel_.reset(new cricket::P2PTransportChannel(
name, "", NULL, allocator_.get()));
channel_->SignalRequestSignaling.connect(
this, &P2PTransportImpl::OnRequestSignaling);
channel_->SignalCandidateReady.connect(
this, &P2PTransportImpl::OnCandidateReady);
if (protocol == PROTOCOL_UDP) {
channel_->SignalWritableState.connect(
this, &P2PTransportImpl::OnReadableState);
channel_->SignalWritableState.connect(
this, &P2PTransportImpl::OnWriteableState);
}
channel_adapter_.reset(new jingle_glue::TransportChannelSocketAdapter(
channel_.get()));
channel_->Connect();
if (protocol == PROTOCOL_TCP) {
pseudo_tcp_adapter_.reset(new jingle_glue::PseudoTcpAdapter(
channel_adapter_.release()));
int result = pseudo_tcp_adapter_->Connect(&connect_callback_);
if (result != net::ERR_IO_PENDING)
OnTcpConnected(result);
}
return true;
}
bool P2PTransportImpl::AddRemoteCandidate(const std::string& address) {
cricket::Candidate candidate;
if (!DeserializeCandidate(address, &candidate)) {
return false;
}
channel_->OnCandidate(candidate);
return true;
}
void P2PTransportImpl::OnRequestSignaling() {
channel_->OnSignalingReady();
}
void P2PTransportImpl::OnCandidateReady(
cricket::TransportChannelImpl* channel,
const cricket::Candidate& candidate) {
event_handler_->OnCandidateReady(SerializeCandidate(candidate));
}
void P2PTransportImpl::OnReadableState(cricket::TransportChannel* channel) {
state_ = static_cast<State>(state_ | STATE_READABLE);
event_handler_->OnStateChange(state_);
}
void P2PTransportImpl::OnWriteableState(cricket::TransportChannel* channel) {
state_ = static_cast<State>(state_ | STATE_WRITABLE);
event_handler_->OnStateChange(state_);
}
std::string P2PTransportImpl::SerializeCandidate(
const cricket::Candidate& candidate) {
// TODO(sergeyu): Use SDP to format candidates?
DictionaryValue value;
value.SetString("name", candidate.name());
value.SetString("ip", candidate.address().IPAsString());
value.SetInteger("port", candidate.address().port());
value.SetString("type", candidate.type());
value.SetString("protocol", candidate.protocol());
value.SetString("username", candidate.username());
value.SetString("password", candidate.password());
value.SetDouble("preference", candidate.preference());
value.SetInteger("generation", candidate.generation());
std::string result;
JSONStringValueSerializer serializer(&result);
serializer.Serialize(value);
return result;
}
bool P2PTransportImpl::DeserializeCandidate(const std::string& address,
cricket::Candidate* candidate) {
JSONStringValueSerializer deserializer(address);
scoped_ptr<Value> value(deserializer.Deserialize(NULL, NULL));
if (!value.get() || !value->IsType(Value::TYPE_DICTIONARY)) {
return false;
}
DictionaryValue* dic_value = static_cast<DictionaryValue*>(value.get());
std::string name;
std::string ip;
int port;
std::string type;
std::string protocol;
std::string username;
std::string password;
double preference;
int generation;
if (!dic_value->GetString("name", &name) ||
!dic_value->GetString("ip", &ip) ||
!dic_value->GetInteger("port", &port) ||
!dic_value->GetString("type", &type) ||
!dic_value->GetString("protocol", &protocol) ||
!dic_value->GetString("username", &username) ||
!dic_value->GetString("password", &password) ||
!dic_value->GetDouble("preference", &preference) ||
!dic_value->GetInteger("generation", &generation)) {
return false;
}
candidate->set_name(name);
candidate->set_address(talk_base::SocketAddress(ip, port));
candidate->set_type(type);
candidate->set_protocol(protocol);
candidate->set_username(username);
candidate->set_password(password);
candidate->set_preference(static_cast<float>(preference));
candidate->set_generation(generation);
return true;
}
net::Socket* P2PTransportImpl::GetChannel() {
if (pseudo_tcp_adapter_.get()) {
DCHECK(!channel_adapter_.get());
return pseudo_tcp_adapter_.get();
} else {
DCHECK(channel_adapter_.get());
return channel_adapter_.get();
}
}
void P2PTransportImpl::OnTcpConnected(int result) {
if (result < 0) {
event_handler_->OnError(result);
return;
}
state_ = static_cast<State>(STATE_READABLE | STATE_WRITABLE);
event_handler_->OnStateChange(state_);
}
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