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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "remoting/client/chromoting_client.h"
      6 
      7 #include "base/bind.h"
      8 #include "remoting/base/capabilities.h"
      9 #include "remoting/client/audio_decode_scheduler.h"
     10 #include "remoting/client/audio_player.h"
     11 #include "remoting/client/client_context.h"
     12 #include "remoting/client/client_user_interface.h"
     13 #include "remoting/client/video_renderer.h"
     14 #include "remoting/proto/audio.pb.h"
     15 #include "remoting/proto/video.pb.h"
     16 #include "remoting/protocol/authentication_method.h"
     17 #include "remoting/protocol/connection_to_host.h"
     18 #include "remoting/protocol/host_stub.h"
     19 #include "remoting/protocol/negotiating_client_authenticator.h"
     20 #include "remoting/protocol/session_config.h"
     21 #include "remoting/protocol/transport.h"
     22 
     23 namespace remoting {
     24 
     25 using protocol::AuthenticationMethod;
     26 
     27 ChromotingClient::ChromotingClient(
     28     const ClientConfig& config,
     29     ClientContext* client_context,
     30     protocol::ConnectionToHost* connection,
     31     ClientUserInterface* user_interface,
     32     VideoRenderer* video_renderer,
     33     scoped_ptr<AudioPlayer> audio_player)
     34     : config_(config),
     35       task_runner_(client_context->main_task_runner()),
     36       connection_(connection),
     37       user_interface_(user_interface),
     38       video_renderer_(video_renderer),
     39       host_capabilities_received_(false),
     40       weak_factory_(this) {
     41   if (audio_player) {
     42     audio_decode_scheduler_.reset(new AudioDecodeScheduler(
     43         client_context->main_task_runner(),
     44         client_context->audio_decode_task_runner(),
     45         audio_player.Pass()));
     46   }
     47 }
     48 
     49 ChromotingClient::~ChromotingClient() {
     50 }
     51 
     52 void ChromotingClient::Start(
     53     SignalStrategy* signal_strategy,
     54     scoped_ptr<protocol::TransportFactory> transport_factory) {
     55   DCHECK(task_runner_->BelongsToCurrentThread());
     56 
     57   scoped_ptr<protocol::Authenticator> authenticator(
     58       new protocol::NegotiatingClientAuthenticator(
     59           config_.client_pairing_id,
     60           config_.client_paired_secret,
     61           config_.authentication_tag,
     62           config_.fetch_secret_callback,
     63           user_interface_->GetTokenFetcher(config_.host_public_key),
     64           config_.authentication_methods));
     65 
     66   // Create a WeakPtr to ourself for to use for all posted tasks.
     67   weak_ptr_ = weak_factory_.GetWeakPtr();
     68 
     69   connection_->set_client_stub(this);
     70   connection_->set_clipboard_stub(this);
     71   connection_->set_video_stub(video_renderer_);
     72   connection_->set_audio_stub(audio_decode_scheduler_.get());
     73 
     74   connection_->Connect(signal_strategy,
     75                        transport_factory.Pass(),
     76                        authenticator.Pass(),
     77                        config_.host_jid,
     78                        config_.host_public_key,
     79                        this);
     80 }
     81 
     82 void ChromotingClient::SetCapabilities(
     83     const protocol::Capabilities& capabilities) {
     84   DCHECK(task_runner_->BelongsToCurrentThread());
     85 
     86   // Only accept the first |protocol::Capabilities| message.
     87   if (host_capabilities_received_) {
     88     LOG(WARNING) << "protocol::Capabilities has been received already.";
     89     return;
     90   }
     91 
     92   host_capabilities_received_ = true;
     93   if (capabilities.has_capabilities())
     94     host_capabilities_ = capabilities.capabilities();
     95 
     96   VLOG(1) << "Host capabilities: " << host_capabilities_;
     97 
     98   // Calculate the set of capabilities enabled by both client and host and pass
     99   // it to the webapp.
    100   user_interface_->SetCapabilities(
    101       IntersectCapabilities(config_.capabilities, host_capabilities_));
    102 }
    103 
    104 void ChromotingClient::SetPairingResponse(
    105     const protocol::PairingResponse& pairing_response) {
    106   DCHECK(task_runner_->BelongsToCurrentThread());
    107 
    108   user_interface_->SetPairingResponse(pairing_response);
    109 }
    110 
    111 void ChromotingClient::DeliverHostMessage(
    112     const protocol::ExtensionMessage& message) {
    113   DCHECK(task_runner_->BelongsToCurrentThread());
    114 
    115   user_interface_->DeliverHostMessage(message);
    116 }
    117 
    118 void ChromotingClient::InjectClipboardEvent(
    119     const protocol::ClipboardEvent& event) {
    120   DCHECK(task_runner_->BelongsToCurrentThread());
    121 
    122   user_interface_->GetClipboardStub()->InjectClipboardEvent(event);
    123 }
    124 
    125 void ChromotingClient::SetCursorShape(
    126     const protocol::CursorShapeInfo& cursor_shape) {
    127   DCHECK(task_runner_->BelongsToCurrentThread());
    128 
    129   user_interface_->GetCursorShapeStub()->SetCursorShape(cursor_shape);
    130 }
    131 
    132 void ChromotingClient::OnConnectionState(
    133     protocol::ConnectionToHost::State state,
    134     protocol::ErrorCode error) {
    135   DCHECK(task_runner_->BelongsToCurrentThread());
    136   VLOG(1) << "ChromotingClient::OnConnectionState(" << state << ")";
    137 
    138   if (state == protocol::ConnectionToHost::AUTHENTICATED) {
    139     OnAuthenticated();
    140   } else if (state == protocol::ConnectionToHost::CONNECTED) {
    141     OnChannelsConnected();
    142   }
    143   user_interface_->OnConnectionState(state, error);
    144 }
    145 
    146 void ChromotingClient::OnConnectionReady(bool ready) {
    147   VLOG(1) << "ChromotingClient::OnConnectionReady(" << ready << ")";
    148   user_interface_->OnConnectionReady(ready);
    149 }
    150 
    151 void ChromotingClient::OnRouteChanged(const std::string& channel_name,
    152                                       const protocol::TransportRoute& route) {
    153   VLOG(0) << "Using " << protocol::TransportRoute::GetTypeString(route.type)
    154           << " connection for " << channel_name << " channel";
    155   user_interface_->OnRouteChanged(channel_name, route);
    156 }
    157 
    158 void ChromotingClient::OnAuthenticated() {
    159   DCHECK(task_runner_->BelongsToCurrentThread());
    160 
    161   // Initialize the decoder.
    162   video_renderer_->Initialize(connection_->config());
    163   if (connection_->config().is_audio_enabled())
    164     audio_decode_scheduler_->Initialize(connection_->config());
    165 
    166   // Do not negotiate capabilities with the host if the host does not support
    167   // them.
    168   if (!connection_->config().SupportsCapabilities()) {
    169     VLOG(1) << "The host does not support any capabilities.";
    170 
    171     host_capabilities_received_ = true;
    172     user_interface_->SetCapabilities(host_capabilities_);
    173   }
    174 }
    175 
    176 void ChromotingClient::OnChannelsConnected() {
    177   DCHECK(task_runner_->BelongsToCurrentThread());
    178 
    179   // Negotiate capabilities with the host.
    180   if (connection_->config().SupportsCapabilities()) {
    181     VLOG(1) << "Client capabilities: " << config_.capabilities;
    182 
    183     protocol::Capabilities capabilities;
    184     capabilities.set_capabilities(config_.capabilities);
    185     connection_->host_stub()->SetCapabilities(capabilities);
    186   }
    187 }
    188 
    189 }  // namespace remoting
    190