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// Copyright 2012 The Chromium Authors
// 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 <stdint.h>
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "net/socket/stream_socket.h"
#include "remoting/base/compound_buffer.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_pipe.h"
#include "remoting/protocol/message_serialization.h"
namespace remoting::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_t 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) {}
ClientControlDispatcher::~ClientControlDispatcher() = default;
void ClientControlDispatcher::InjectClipboardEvent(
const ClipboardEvent& event) {
ControlMessage message;
message.mutable_clipboard_event()->CopyFrom(event);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::NotifyClientResolution(
const ClientResolution& resolution) {
ControlMessage message;
message.mutable_client_resolution()->CopyFrom(resolution);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::ControlVideo(const VideoControl& video_control) {
ControlMessage message;
message.mutable_video_control()->CopyFrom(video_control);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::ControlAudio(const AudioControl& audio_control) {
ControlMessage message;
message.mutable_audio_control()->CopyFrom(audio_control);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::SetCapabilities(
const Capabilities& capabilities) {
ControlMessage message;
message.mutable_capabilities()->CopyFrom(capabilities);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::RequestPairing(
const PairingRequest& pairing_request) {
ControlMessage message;
message.mutable_pairing_request()->CopyFrom(pairing_request);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::DeliverClientMessage(
const ExtensionMessage& message) {
ControlMessage control_message;
control_message.mutable_extension_message()->CopyFrom(message);
message_pipe()->Send(&control_message, {});
}
void ClientControlDispatcher::SelectDesktopDisplay(
const SelectDesktopDisplayRequest& select_display) {
ControlMessage message;
message.mutable_select_display()->CopyFrom(select_display);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::ControlPeerConnection(
const protocol::PeerConnectionParameters& parameters) {
ControlMessage message;
message.mutable_peer_connection_parameters()->CopyFrom(parameters);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::SetVideoLayout(const VideoLayout& video_layout) {
ControlMessage message;
message.mutable_video_layout()->CopyFrom(video_layout);
message_pipe()->Send(&message, {});
}
void ClientControlDispatcher::OnIncomingMessage(
std::unique_ptr<CompoundBuffer> buffer) {
DCHECK(client_stub_);
DCHECK(clipboard_stub_);
std::unique_ptr<ControlMessage> message =
ParseMessage<ControlMessage>(buffer.get());
if (!message) {
return;
}
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 if (message->has_video_layout()) {
client_stub_->SetVideoLayout(message->video_layout());
} else {
LOG(WARNING) << "Unknown control message received.";
}
}
} // namespace remoting::protocol
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