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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 "remoting/protocol/connection_to_client.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/message_loop_proxy.h"
#include "google/protobuf/message.h"
#include "net/base/io_buffer.h"
#include "remoting/protocol/client_control_sender.h"
#include "remoting/protocol/host_message_dispatcher.h"
#include "remoting/protocol/host_stub.h"
#include "remoting/protocol/input_stub.h"
namespace remoting {
namespace protocol {
ConnectionToClient::ConnectionToClient(protocol::Session* session)
: handler_(NULL),
host_stub_(NULL),
input_stub_(NULL),
session_(session),
control_connected_(false),
input_connected_(false),
video_connected_(false) {
session_->SetStateChangeCallback(
base::Bind(&ConnectionToClient::OnSessionStateChange,
base::Unretained(this)));
}
ConnectionToClient::~ConnectionToClient() {
if (session_.get()) {
base::MessageLoopProxy::current()->DeleteSoon(
FROM_HERE, session_.release());
}
}
void ConnectionToClient::SetEventHandler(EventHandler* event_handler) {
DCHECK(CalledOnValidThread());
handler_ = event_handler;
}
protocol::Session* ConnectionToClient::session() {
DCHECK(CalledOnValidThread());
return session_.get();
}
void ConnectionToClient::Disconnect() {
DCHECK(CalledOnValidThread());
CloseChannels();
DCHECK(session_.get());
Session* session = session_.release();
// It may not be safe to delete |session_| here becase this method
// may be invoked in resonse to a libjingle event and libjingle's
// sigslot doesn't handle it properly, so postpone the deletion.
base::MessageLoopProxy::current()->DeleteSoon(FROM_HERE, session);
// This should trigger OnConnectionClosed() event and this object
// may be destroyed as the result.
session->Close();
}
void ConnectionToClient::UpdateSequenceNumber(int64 sequence_number) {
DCHECK(CalledOnValidThread());
handler_->OnSequenceNumberUpdated(this, sequence_number);
}
VideoStub* ConnectionToClient::video_stub() {
DCHECK(CalledOnValidThread());
return video_writer_.get();
}
// Return pointer to ClientStub.
ClientStub* ConnectionToClient::client_stub() {
DCHECK(CalledOnValidThread());
return client_control_sender_.get();
}
void ConnectionToClient::set_host_stub(protocol::HostStub* host_stub) {
DCHECK(CalledOnValidThread());
host_stub_ = host_stub;
}
void ConnectionToClient::set_input_stub(protocol::InputStub* input_stub) {
DCHECK(CalledOnValidThread());
input_stub_ = input_stub;
}
void ConnectionToClient::OnSessionStateChange(protocol::Session::State state) {
DCHECK(CalledOnValidThread());
DCHECK(handler_);
switch(state) {
case protocol::Session::CONNECTING:
// Don't care about this message.
break;
case protocol::Session::CONNECTED:
video_writer_.reset(
VideoWriter::Create(base::MessageLoopProxy::current(),
session_->config()));
video_writer_->Init(
session_.get(), base::Bind(&ConnectionToClient::OnVideoInitialized,
base::Unretained(this)));
break;
case protocol::Session::CONNECTED_CHANNELS:
client_control_sender_.reset(
new ClientControlSender(base::MessageLoopProxy::current(),
session_->control_channel()));
dispatcher_.reset(new HostMessageDispatcher());
dispatcher_->Initialize(this, host_stub_, input_stub_);
control_connected_ = true;
input_connected_ = true;
NotifyIfChannelsReady();
break;
case protocol::Session::CLOSED:
CloseChannels();
handler_->OnConnectionClosed(this);
break;
case protocol::Session::FAILED:
CloseOnError();
break;
default:
// We shouldn't receive other states.
NOTREACHED();
}
}
void ConnectionToClient::OnVideoInitialized(bool successful) {
DCHECK(CalledOnValidThread());
if (!successful) {
LOG(ERROR) << "Failed to connect video channel";
CloseOnError();
return;
}
video_connected_ = true;
NotifyIfChannelsReady();
}
void ConnectionToClient::NotifyIfChannelsReady() {
DCHECK(CalledOnValidThread());
if (control_connected_ && input_connected_ && video_connected_)
handler_->OnConnectionOpened(this);
}
void ConnectionToClient::CloseOnError() {
CloseChannels();
handler_->OnConnectionFailed(this);
}
void ConnectionToClient::CloseChannels() {
if (video_writer_.get())
video_writer_->Close();
if (client_control_sender_.get())
client_control_sender_->Close();
}
} // namespace protocol
} // namespace remoting
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