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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/client_control_dispatcher.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/callback_helpers.h"
#include "net/socket/stream_socket.h"
#include "remoting/base/constants.h"
#include "remoting/proto/control.pb.h"
#include "remoting/proto/internal.pb.h"
#include "remoting/protocol/client_stub.h"
#include "remoting/protocol/message_serialization.h"
namespace remoting {
namespace protocol {
namespace {
// 32-bit BGRA is 4 bytes per pixel.
const int kBytesPerPixel = 4;
bool CursorShapeIsValid(const CursorShapeInfo& cursor_shape) {
if (!cursor_shape.has_data() ||
!cursor_shape.has_width() ||
!cursor_shape.has_height() ||
!cursor_shape.has_hotspot_x() ||
!cursor_shape.has_hotspot_y()) {
LOG(ERROR) << "Cursor shape is missing required fields.";
return false;
}
int width = cursor_shape.width();
int height = cursor_shape.height();
// Verify that |width| and |height| are within sane limits. Otherwise integer
// overflow can occur while calculating |cursor_total_bytes| below.
if (width < 0 || width > (SHRT_MAX / 2) ||
height < 0 || height > (SHRT_MAX / 2)) {
LOG(ERROR) << "Cursor dimensions are out of bounds for SetCursor: "
<< width << "x" << height;
return false;
}
uint32 cursor_total_bytes = width * height * kBytesPerPixel;
if (cursor_shape.data().size() < cursor_total_bytes) {
LOG(ERROR) << "Expected " << cursor_total_bytes << " bytes for a "
<< width << "x" << height << " cursor. Only received "
<< cursor_shape.data().size() << " bytes";
return false;
}
return true;
}
} // namespace
ClientControlDispatcher::ClientControlDispatcher()
: ChannelDispatcherBase(kControlChannelName),
client_stub_(nullptr),
clipboard_stub_(nullptr),
parser_(base::Bind(&ClientControlDispatcher::OnMessageReceived,
base::Unretained(this)),
reader()) {
}
ClientControlDispatcher::~ClientControlDispatcher() {
}
void ClientControlDispatcher::InjectClipboardEvent(
const ClipboardEvent& event) {
ControlMessage message;
message.mutable_clipboard_event()->CopyFrom(event);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::NotifyClientResolution(
const ClientResolution& resolution) {
ControlMessage message;
message.mutable_client_resolution()->CopyFrom(resolution);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::ControlVideo(const VideoControl& video_control) {
ControlMessage message;
message.mutable_video_control()->CopyFrom(video_control);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::ControlAudio(const AudioControl& audio_control) {
ControlMessage message;
message.mutable_audio_control()->CopyFrom(audio_control);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::SetCapabilities(
const Capabilities& capabilities) {
ControlMessage message;
message.mutable_capabilities()->CopyFrom(capabilities);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::RequestPairing(
const PairingRequest& pairing_request) {
ControlMessage message;
message.mutable_pairing_request()->CopyFrom(pairing_request);
writer()->Write(SerializeAndFrameMessage(message), base::Closure());
}
void ClientControlDispatcher::DeliverClientMessage(
const ExtensionMessage& message) {
ControlMessage control_message;
control_message.mutable_extension_message()->CopyFrom(message);
writer()->Write(SerializeAndFrameMessage(control_message), base::Closure());
}
void ClientControlDispatcher::OnMessageReceived(
scoped_ptr<ControlMessage> message,
const base::Closure& done_task) {
DCHECK(client_stub_);
DCHECK(clipboard_stub_);
base::ScopedClosureRunner done_runner(done_task);
if (message->has_clipboard_event()) {
clipboard_stub_->InjectClipboardEvent(message->clipboard_event());
} else if (message->has_capabilities()) {
client_stub_->SetCapabilities(message->capabilities());
} else if (message->has_cursor_shape()) {
if (CursorShapeIsValid(message->cursor_shape()))
client_stub_->SetCursorShape(message->cursor_shape());
} else if (message->has_pairing_response()) {
client_stub_->SetPairingResponse(message->pairing_response());
} else if (message->has_extension_message()) {
client_stub_->DeliverHostMessage(message->extension_message());
} else {
LOG(WARNING) << "Unknown control message received.";
}
}
} // namespace protocol
} // namespace remoting
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