| // Copyright 2014 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 "ipc/mojo/ipc_channel_mojo.h" |
| |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/lazy_instance.h" |
| #include "ipc/ipc_listener.h" |
| #include "ipc/ipc_logging.h" |
| #include "ipc/ipc_message_attachment_set.h" |
| #include "ipc/ipc_message_macros.h" |
| #include "ipc/mojo/client_channel.mojom.h" |
| #include "ipc/mojo/ipc_mojo_bootstrap.h" |
| #include "third_party/mojo/src/mojo/edk/embedder/embedder.h" |
| #include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h" |
| |
| namespace IPC { |
| |
| namespace { |
| |
| class MojoChannelFactory : public ChannelFactory { |
| public: |
| MojoChannelFactory(ChannelMojo::Delegate* delegate, |
| ChannelHandle channel_handle, |
| Channel::Mode mode) |
| : delegate_(delegate), channel_handle_(channel_handle), mode_(mode) {} |
| |
| std::string GetName() const override { |
| return channel_handle_.name; |
| } |
| |
| scoped_ptr<Channel> BuildChannel(Listener* listener) override { |
| return ChannelMojo::Create(delegate_, channel_handle_, mode_, listener); |
| } |
| |
| private: |
| ChannelMojo::Delegate* delegate_; |
| ChannelHandle channel_handle_; |
| Channel::Mode mode_; |
| }; |
| |
| //------------------------------------------------------------------------------ |
| |
| class ClientChannelMojo |
| : public ChannelMojo, |
| public NON_EXPORTED_BASE(mojo::InterfaceImpl<ClientChannel>) { |
| public: |
| ClientChannelMojo(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& handle, |
| Listener* listener); |
| ~ClientChannelMojo() override; |
| // MojoBootstrap::Delegate implementation |
| void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle) override; |
| // InterfaceImpl implementation |
| void OnConnectionError() override; |
| // ClientChannel implementation |
| void Init( |
| mojo::ScopedMessagePipeHandle pipe, |
| int32_t peer_pid, |
| const mojo::Callback<void(int32_t)>& callback) override; |
| |
| DISALLOW_COPY_AND_ASSIGN(ClientChannelMojo); |
| }; |
| |
| ClientChannelMojo::ClientChannelMojo(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& handle, |
| Listener* listener) |
| : ChannelMojo(delegate, handle, Channel::MODE_CLIENT, listener) { |
| } |
| |
| ClientChannelMojo::~ClientChannelMojo() { |
| } |
| |
| void ClientChannelMojo::OnPipeAvailable( |
| mojo::embedder::ScopedPlatformHandle handle) { |
| mojo::WeakBindToPipe(this, CreateMessagingPipe(handle.Pass())); |
| } |
| |
| void ClientChannelMojo::OnConnectionError() { |
| listener()->OnChannelError(); |
| } |
| |
| void ClientChannelMojo::Init( |
| mojo::ScopedMessagePipeHandle pipe, |
| int32_t peer_pid, |
| const mojo::Callback<void(int32_t)>& callback) { |
| InitMessageReader(pipe.Pass(), static_cast<base::ProcessId>(peer_pid)); |
| callback.Run(GetSelfPID()); |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| class ServerChannelMojo : public ChannelMojo, public mojo::ErrorHandler { |
| public: |
| ServerChannelMojo(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& handle, |
| Listener* listener); |
| ~ServerChannelMojo() override; |
| |
| // MojoBootstrap::Delegate implementation |
| void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle) override; |
| // ErrorHandler implementation |
| void OnConnectionError() override; |
| // Channel override |
| void Close() override; |
| |
| private: |
| // ClientChannelClient implementation |
| void ClientChannelWasInitialized(int32_t peer_pid); |
| |
| mojo::InterfacePtr<ClientChannel> client_channel_; |
| mojo::ScopedMessagePipeHandle message_pipe_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ServerChannelMojo); |
| }; |
| |
| ServerChannelMojo::ServerChannelMojo(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& handle, |
| Listener* listener) |
| : ChannelMojo(delegate, handle, Channel::MODE_SERVER, listener) { |
| } |
| |
| ServerChannelMojo::~ServerChannelMojo() { |
| Close(); |
| } |
| |
| void ServerChannelMojo::OnPipeAvailable( |
| mojo::embedder::ScopedPlatformHandle handle) { |
| mojo::ScopedMessagePipeHandle peer; |
| MojoResult create_result = |
| mojo::CreateMessagePipe(nullptr, &message_pipe_, &peer); |
| if (create_result != MOJO_RESULT_OK) { |
| DLOG(WARNING) << "mojo::CreateMessagePipe failed: " << create_result; |
| listener()->OnChannelError(); |
| return; |
| } |
| |
| client_channel_.Bind(CreateMessagingPipe(handle.Pass())); |
| client_channel_.set_error_handler(this); |
| client_channel_->Init( |
| peer.Pass(), |
| static_cast<int32_t>(GetSelfPID()), |
| base::Bind(&ServerChannelMojo::ClientChannelWasInitialized, |
| base::Unretained(this))); |
| } |
| |
| void ServerChannelMojo::ClientChannelWasInitialized(int32_t peer_pid) { |
| InitMessageReader(message_pipe_.Pass(), peer_pid); |
| } |
| |
| void ServerChannelMojo::OnConnectionError() { |
| listener()->OnChannelError(); |
| } |
| |
| void ServerChannelMojo::Close() { |
| client_channel_.reset(); |
| message_pipe_.reset(); |
| ChannelMojo::Close(); |
| } |
| |
| } // namespace |
| |
| //------------------------------------------------------------------------------ |
| |
| void ChannelMojo::ChannelInfoDeleter::operator()( |
| mojo::embedder::ChannelInfo* ptr) const { |
| mojo::embedder::DestroyChannel(ptr); |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| // static |
| bool ChannelMojo::ShouldBeUsed() { |
| // TODO(morrita): Turn this on for a set of platforms. |
| return false; |
| } |
| |
| // static |
| scoped_ptr<ChannelMojo> ChannelMojo::Create(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& channel_handle, |
| Mode mode, |
| Listener* listener) { |
| switch (mode) { |
| case Channel::MODE_CLIENT: |
| return make_scoped_ptr( |
| new ClientChannelMojo(delegate, channel_handle, listener)); |
| case Channel::MODE_SERVER: |
| return make_scoped_ptr( |
| new ServerChannelMojo(delegate, channel_handle, listener)); |
| default: |
| NOTREACHED(); |
| return nullptr; |
| } |
| } |
| |
| // static |
| scoped_ptr<ChannelFactory> ChannelMojo::CreateServerFactory( |
| ChannelMojo::Delegate* delegate, |
| const ChannelHandle& channel_handle) { |
| return make_scoped_ptr( |
| new MojoChannelFactory(delegate, channel_handle, Channel::MODE_SERVER)); |
| } |
| |
| // static |
| scoped_ptr<ChannelFactory> ChannelMojo::CreateClientFactory( |
| const ChannelHandle& channel_handle) { |
| return make_scoped_ptr( |
| new MojoChannelFactory(NULL, channel_handle, Channel::MODE_CLIENT)); |
| } |
| |
| ChannelMojo::ChannelMojo(ChannelMojo::Delegate* delegate, |
| const ChannelHandle& handle, |
| Mode mode, |
| Listener* listener) |
| : mode_(mode), |
| listener_(listener), |
| peer_pid_(base::kNullProcessId), |
| weak_factory_(this) { |
| // Create MojoBootstrap after all members are set as it touches |
| // ChannelMojo from a different thread. |
| bootstrap_ = MojoBootstrap::Create(handle, mode, this); |
| if (delegate) { |
| if (delegate->GetIOTaskRunner() == |
| base::MessageLoop::current()->message_loop_proxy()) { |
| InitDelegate(delegate); |
| } else { |
| delegate->GetIOTaskRunner()->PostTask( |
| FROM_HERE, |
| base::Bind( |
| &ChannelMojo::InitDelegate, base::Unretained(this), delegate)); |
| } |
| } |
| } |
| |
| ChannelMojo::~ChannelMojo() { |
| Close(); |
| } |
| |
| void ChannelMojo::InitDelegate(ChannelMojo::Delegate* delegate) { |
| delegate_ = delegate->ToWeakPtr(); |
| delegate_->OnChannelCreated(weak_factory_.GetWeakPtr()); |
| } |
| |
| mojo::ScopedMessagePipeHandle ChannelMojo::CreateMessagingPipe( |
| mojo::embedder::ScopedPlatformHandle handle) { |
| DCHECK(!channel_info_.get()); |
| mojo::embedder::ChannelInfo* channel_info; |
| mojo::ScopedMessagePipeHandle pipe = |
| mojo::embedder::CreateChannelOnIOThread(handle.Pass(), &channel_info); |
| channel_info_.reset(channel_info); |
| return pipe.Pass(); |
| } |
| |
| bool ChannelMojo::Connect() { |
| DCHECK(!message_reader_); |
| return bootstrap_->Connect(); |
| } |
| |
| void ChannelMojo::Close() { |
| message_reader_.reset(); |
| channel_info_.reset(); |
| } |
| |
| void ChannelMojo::OnBootstrapError() { |
| listener_->OnChannelError(); |
| } |
| |
| void ChannelMojo::InitMessageReader(mojo::ScopedMessagePipeHandle pipe, |
| int32_t peer_pid) { |
| message_reader_ = |
| make_scoped_ptr(new internal::MessagePipeReader(pipe.Pass(), this)); |
| |
| for (size_t i = 0; i < pending_messages_.size(); ++i) { |
| bool sent = message_reader_->Send(make_scoped_ptr(pending_messages_[i])); |
| pending_messages_[i] = NULL; |
| if (!sent) { |
| pending_messages_.clear(); |
| listener_->OnChannelError(); |
| return; |
| } |
| } |
| |
| pending_messages_.clear(); |
| |
| set_peer_pid(peer_pid); |
| listener_->OnChannelConnected(static_cast<int32_t>(GetPeerPID())); |
| if (message_reader_) |
| message_reader_->ReadMessagesThenWait(); |
| } |
| |
| void ChannelMojo::OnPipeClosed(internal::MessagePipeReader* reader) { |
| Close(); |
| } |
| |
| void ChannelMojo::OnPipeError(internal::MessagePipeReader* reader) { |
| listener_->OnChannelError(); |
| } |
| |
| |
| bool ChannelMojo::Send(Message* message) { |
| if (!message_reader_) { |
| pending_messages_.push_back(message); |
| return true; |
| } |
| |
| return message_reader_->Send(make_scoped_ptr(message)); |
| } |
| |
| base::ProcessId ChannelMojo::GetPeerPID() const { |
| return peer_pid_; |
| } |
| |
| base::ProcessId ChannelMojo::GetSelfPID() const { |
| return base::GetCurrentProcId(); |
| } |
| |
| void ChannelMojo::OnClientLaunched(base::ProcessHandle handle) { |
| bootstrap_->OnClientLaunched(handle); |
| } |
| |
| void ChannelMojo::OnMessageReceived(Message& message) { |
| TRACE_EVENT2("ipc,toplevel", "ChannelMojo::OnMessageReceived", |
| "class", IPC_MESSAGE_ID_CLASS(message.type()), |
| "line", IPC_MESSAGE_ID_LINE(message.type())); |
| listener_->OnMessageReceived(message); |
| if (message.dispatch_error()) |
| listener_->OnBadMessageReceived(message); |
| } |
| |
| #if defined(OS_POSIX) && !defined(OS_NACL) |
| int ChannelMojo::GetClientFileDescriptor() const { |
| return bootstrap_->GetClientFileDescriptor(); |
| } |
| |
| base::ScopedFD ChannelMojo::TakeClientFileDescriptor() { |
| return bootstrap_->TakeClientFileDescriptor(); |
| } |
| |
| // static |
| MojoResult ChannelMojo::WriteToMessageAttachmentSet( |
| const std::vector<MojoHandle>& handle_buffer, |
| Message* message) { |
| for (size_t i = 0; i < handle_buffer.size(); ++i) { |
| mojo::embedder::ScopedPlatformHandle platform_handle; |
| MojoResult unwrap_result = mojo::embedder::PassWrappedPlatformHandle( |
| handle_buffer[i], &platform_handle); |
| if (unwrap_result != MOJO_RESULT_OK) { |
| DLOG(WARNING) << "Pipe failed to covert handles. Closing: " |
| << unwrap_result; |
| return unwrap_result; |
| } |
| |
| bool ok = message->attachment_set()->AddToOwn( |
| base::ScopedFD(platform_handle.release().fd)); |
| DCHECK(ok); |
| } |
| |
| return MOJO_RESULT_OK; |
| } |
| |
| // static |
| MojoResult ChannelMojo::ReadFromMessageAttachmentSet( |
| Message* message, |
| std::vector<MojoHandle>* handles) { |
| // We dup() the handles in IPC::Message to transmit. |
| // IPC::MessageAttachmentSet has intricate lifecycle semantics |
| // of FDs, so just to dup()-and-own them is the safest option. |
| if (message->HasFileDescriptors()) { |
| MessageAttachmentSet* fdset = message->attachment_set(); |
| std::vector<base::PlatformFile> fds_to_send(fdset->size()); |
| fdset->PeekDescriptors(&fds_to_send[0]); |
| for (size_t i = 0; i < fds_to_send.size(); ++i) { |
| int fd_to_send = dup(fds_to_send[i]); |
| if (-1 == fd_to_send) { |
| DPLOG(WARNING) << "Failed to dup FD to transmit."; |
| fdset->CommitAll(); |
| return MOJO_RESULT_UNKNOWN; |
| } |
| |
| MojoHandle wrapped_handle; |
| MojoResult wrap_result = CreatePlatformHandleWrapper( |
| mojo::embedder::ScopedPlatformHandle( |
| mojo::embedder::PlatformHandle(fd_to_send)), |
| &wrapped_handle); |
| if (MOJO_RESULT_OK != wrap_result) { |
| DLOG(WARNING) << "Pipe failed to wrap handles. Closing: " |
| << wrap_result; |
| fdset->CommitAll(); |
| return wrap_result; |
| } |
| |
| handles->push_back(wrapped_handle); |
| } |
| |
| fdset->CommitAll(); |
| } |
| |
| return MOJO_RESULT_OK; |
| } |
| |
| #endif // defined(OS_POSIX) && !defined(OS_NACL) |
| |
| } // namespace IPC |