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// Copyright 2015 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/ice_connection_to_host.h"
#include <utility>
#include "base/bind.h"
#include "base/callback.h"
#include "base/location.h"
#include "remoting/base/constants.h"
#include "remoting/protocol/audio_reader.h"
#include "remoting/protocol/audio_stub.h"
#include "remoting/protocol/auth_util.h"
#include "remoting/protocol/client_control_dispatcher.h"
#include "remoting/protocol/client_event_dispatcher.h"
#include "remoting/protocol/client_stub.h"
#include "remoting/protocol/client_video_dispatcher.h"
#include "remoting/protocol/clipboard_stub.h"
#include "remoting/protocol/errors.h"
#include "remoting/protocol/ice_transport.h"
#include "remoting/protocol/transport_context.h"
#include "remoting/protocol/video_renderer.h"
namespace remoting {
namespace protocol {
IceConnectionToHost::IceConnectionToHost() {}
IceConnectionToHost::~IceConnectionToHost() {}
void IceConnectionToHost::Connect(
scoped_ptr<Session> session,
scoped_refptr<TransportContext> transport_context,
HostEventCallback* event_callback) {
DCHECK(client_stub_);
DCHECK(clipboard_stub_);
DCHECK(video_renderer_);
transport_.reset(new IceTransport(transport_context, this));
session_ = std::move(session);
session_->SetEventHandler(this);
session_->SetTransport(transport_.get());
event_callback_ = event_callback;
SetState(CONNECTING, OK);
}
const SessionConfig& IceConnectionToHost::config() {
return session_->config();
}
ClipboardStub* IceConnectionToHost::clipboard_forwarder() {
return &clipboard_forwarder_;
}
HostStub* IceConnectionToHost::host_stub() {
// TODO(wez): Add a HostFilter class, equivalent to input filter.
return control_dispatcher_.get();
}
InputStub* IceConnectionToHost::input_stub() {
return &event_forwarder_;
}
void IceConnectionToHost::set_client_stub(ClientStub* client_stub) {
client_stub_ = client_stub;
}
void IceConnectionToHost::set_clipboard_stub(ClipboardStub* clipboard_stub) {
clipboard_stub_ = clipboard_stub;
}
void IceConnectionToHost::set_video_renderer(VideoRenderer* video_renderer) {
DCHECK(video_renderer);
DCHECK(!monitored_video_stub_);
video_renderer_ = video_renderer;
}
void IceConnectionToHost::set_audio_stub(AudioStub* audio_stub) {
audio_stub_ = audio_stub;
}
void IceConnectionToHost::OnSessionStateChange(Session::State state) {
DCHECK(CalledOnValidThread());
DCHECK(event_callback_);
switch (state) {
case Session::INITIALIZING:
case Session::CONNECTING:
case Session::ACCEPTING:
case Session::ACCEPTED:
case Session::AUTHENTICATING:
// Don't care about these events.
break;
case Session::AUTHENTICATED:
SetState(AUTHENTICATED, OK);
// Setup control channel.
control_dispatcher_.reset(new ClientControlDispatcher());
control_dispatcher_->Init(transport_->GetMultiplexedChannelFactory(),
this);
control_dispatcher_->set_client_stub(client_stub_);
control_dispatcher_->set_clipboard_stub(clipboard_stub_);
// Setup event channel.
event_dispatcher_.reset(new ClientEventDispatcher());
event_dispatcher_->Init(transport_->GetMultiplexedChannelFactory(), this);
// Configure video pipeline.
video_renderer_->OnSessionConfig(session_->config());
monitored_video_stub_.reset(new MonitoredVideoStub(
video_renderer_->GetVideoStub(),
base::TimeDelta::FromSeconds(
MonitoredVideoStub::kConnectivityCheckDelaySeconds),
base::Bind(&IceConnectionToHost::OnVideoChannelStatus,
base::Unretained(this))));
video_dispatcher_.reset(
new ClientVideoDispatcher(monitored_video_stub_.get()));
video_dispatcher_->Init(transport_->GetChannelFactory(), this);
// Configure audio pipeline if necessary.
if (session_->config().is_audio_enabled()) {
audio_reader_.reset(new AudioReader(audio_stub_));
audio_reader_->Init(transport_->GetMultiplexedChannelFactory(), this);
}
break;
case Session::CLOSED:
CloseChannels();
SetState(CLOSED, OK);
break;
case Session::FAILED:
// If we were connected then treat signaling timeout error as if
// the connection was closed by the peer.
//
// TODO(sergeyu): This logic belongs to the webapp, but we
// currently don't expose this error code to the webapp, and it
// would be hard to add it because client plugin and webapp
// versions may not be in sync. It should be easy to do after we
// are finished moving the client plugin to NaCl.
CloseChannels();
if (state_ == CONNECTED && session_->error() == SIGNALING_TIMEOUT) {
SetState(CLOSED, OK);
} else {
SetState(FAILED, session_->error());
}
break;
}
}
void IceConnectionToHost::OnIceTransportRouteChange(
const std::string& channel_name,
const TransportRoute& route) {
event_callback_->OnRouteChanged(channel_name, route);
}
void IceConnectionToHost::OnIceTransportError(ErrorCode error) {
session_->Close(error);
}
void IceConnectionToHost::OnChannelInitialized(
ChannelDispatcherBase* channel_dispatcher) {
NotifyIfChannelsReady();
}
void IceConnectionToHost::OnVideoChannelStatus(bool active) {
event_callback_->OnConnectionReady(active);
}
ConnectionToHost::State IceConnectionToHost::state() const {
return state_;
}
void IceConnectionToHost::NotifyIfChannelsReady() {
if (!control_dispatcher_.get() || !control_dispatcher_->is_connected())
return;
if (!event_dispatcher_.get() || !event_dispatcher_->is_connected())
return;
if (!video_dispatcher_.get() || !video_dispatcher_->is_connected())
return;
if ((!audio_reader_.get() || !audio_reader_->is_connected()) &&
session_->config().is_audio_enabled()) {
return;
}
if (state_ != AUTHENTICATED)
return;
// Start forwarding clipboard and input events.
clipboard_forwarder_.set_clipboard_stub(control_dispatcher_.get());
event_forwarder_.set_input_stub(event_dispatcher_.get());
SetState(CONNECTED, OK);
}
void IceConnectionToHost::CloseChannels() {
control_dispatcher_.reset();
event_dispatcher_.reset();
clipboard_forwarder_.set_clipboard_stub(nullptr);
event_forwarder_.set_input_stub(nullptr);
video_dispatcher_.reset();
audio_reader_.reset();
}
void IceConnectionToHost::SetState(State state, ErrorCode error) {
DCHECK(CalledOnValidThread());
// |error| should be specified only when |state| is set to FAILED.
DCHECK(state == FAILED || error == OK);
if (state != state_) {
state_ = state;
error_ = error;
event_callback_->OnConnectionState(state_, error_);
}
}
} // namespace protocol
} // namespace remoting
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