| // 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 <stddef.h> |
| #include <stdint.h> |
| #include <memory> |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/command_line.h" |
| #include "base/lazy_instance.h" |
| #include "base/macros.h" |
| #include "base/thread_task_runner_handle.h" |
| #include "build/build_config.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/ipc_mojo_bootstrap.h" |
| #include "ipc/mojo/ipc_mojo_handle_attachment.h" |
| #include "mojo/edk/embedder/embedder.h" |
| #include "mojo/public/cpp/bindings/binding.h" |
| |
| #if defined(OS_POSIX) && !defined(OS_NACL) |
| #include "ipc/ipc_platform_file_attachment_posix.h" |
| #endif |
| |
| namespace IPC { |
| |
| namespace { |
| |
| class MojoChannelFactory : public ChannelFactory { |
| public: |
| MojoChannelFactory(const std::string& token, Channel::Mode mode) |
| : token_(token), mode_(mode) {} |
| |
| std::string GetName() const override { |
| return token_; |
| } |
| |
| scoped_ptr<Channel> BuildChannel(Listener* listener) override { |
| return ChannelMojo::Create(token_, mode_, listener); |
| } |
| |
| private: |
| const std::string token_; |
| const Channel::Mode mode_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MojoChannelFactory); |
| }; |
| |
| #if defined(OS_POSIX) && !defined(OS_NACL) |
| |
| base::ScopedFD TakeOrDupFile(internal::PlatformFileAttachment* attachment) { |
| return attachment->Owns() ? base::ScopedFD(attachment->TakePlatformFile()) |
| : base::ScopedFD(dup(attachment->file())); |
| } |
| |
| #endif |
| |
| } // namespace |
| |
| //------------------------------------------------------------------------------ |
| |
| // static |
| bool ChannelMojo::ShouldBeUsed() { |
| // TODO(rockot): Investigate performance bottlenecks and hopefully reenable |
| // this at some point. http://crbug.com/500019 |
| return false; |
| } |
| |
| // static |
| scoped_ptr<ChannelMojo> ChannelMojo::Create(const std::string& token, |
| Mode mode, |
| Listener* listener) { |
| return make_scoped_ptr( |
| new ChannelMojo(token, mode, listener)); |
| } |
| |
| // static |
| scoped_ptr<ChannelFactory> ChannelMojo::CreateServerFactory( |
| const std::string& token) { |
| return make_scoped_ptr( |
| new MojoChannelFactory(token, Channel::MODE_SERVER)); |
| } |
| |
| // static |
| scoped_ptr<ChannelFactory> ChannelMojo::CreateClientFactory( |
| const std::string& token) { |
| return make_scoped_ptr( |
| new MojoChannelFactory(token, Channel::MODE_CLIENT)); |
| } |
| |
| ChannelMojo::ChannelMojo(const std::string& token, |
| Mode mode, |
| Listener* listener) |
| : listener_(listener), |
| peer_pid_(base::kNullProcessId), |
| waiting_connect_(true), |
| weak_factory_(this) { |
| // Create MojoBootstrap after all members are set as it touches |
| // ChannelMojo from a different thread. |
| bootstrap_ = MojoBootstrap::Create(token, mode, this); |
| } |
| |
| ChannelMojo::~ChannelMojo() { |
| Close(); |
| } |
| |
| scoped_ptr<internal::MessagePipeReader, ChannelMojo::ReaderDeleter> |
| ChannelMojo::CreateMessageReader(mojom::ChannelAssociatedPtrInfo sender, |
| mojom::ChannelAssociatedRequest receiver) { |
| mojom::ChannelAssociatedPtr sender_ptr; |
| sender_ptr.Bind(std::move(sender)); |
| return scoped_ptr<internal::MessagePipeReader, ChannelMojo::ReaderDeleter>( |
| new internal::MessagePipeReader(std::move(sender_ptr), |
| std::move(receiver), this)); |
| } |
| |
| bool ChannelMojo::Connect() { |
| DCHECK(!message_reader_); |
| bootstrap_->Connect(); |
| return true; |
| } |
| |
| void ChannelMojo::Close() { |
| message_reader_.reset(); |
| // We might Close() before we Connect(). |
| waiting_connect_ = false; |
| } |
| |
| // MojoBootstrap::Delegate implementation |
| void ChannelMojo::OnPipesAvailable( |
| mojom::ChannelAssociatedPtrInfo send_channel, |
| mojom::ChannelAssociatedRequest receive_channel, |
| int32_t peer_pid) { |
| set_peer_pid(peer_pid); |
| InitMessageReader(std::move(send_channel), std::move(receive_channel)); |
| } |
| |
| void ChannelMojo::OnBootstrapError() { |
| listener_->OnChannelError(); |
| } |
| |
| void ChannelMojo::InitMessageReader(mojom::ChannelAssociatedPtrInfo sender, |
| mojom::ChannelAssociatedRequest receiver) { |
| scoped_ptr<internal::MessagePipeReader, ChannelMojo::ReaderDeleter> reader = |
| CreateMessageReader(std::move(sender), std::move(receiver)); |
| |
| for (size_t i = 0; i < pending_messages_.size(); ++i) { |
| bool sent = reader->Send(std::move(pending_messages_[i])); |
| if (!sent) { |
| // OnChannelError() is notified by OnPipeError(). |
| pending_messages_.clear(); |
| LOG(ERROR) << "Failed to flush pending messages"; |
| return; |
| } |
| } |
| |
| // We set |message_reader_| here and won't get any |pending_messages_| |
| // hereafter. Although we might have some if there is an error, we don't |
| // care. They cannot be sent anyway. |
| message_reader_ = std::move(reader); |
| pending_messages_.clear(); |
| waiting_connect_ = false; |
| |
| listener_->OnChannelConnected(static_cast<int32_t>(GetPeerPID())); |
| } |
| |
| 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(make_scoped_ptr(message)); |
| // Counts as OK before the connection is established, but it's an |
| // error otherwise. |
| return waiting_connect_; |
| } |
| |
| return message_reader_->Send(make_scoped_ptr(message)); |
| } |
| |
| base::ProcessId ChannelMojo::GetPeerPID() const { |
| return peer_pid_; |
| } |
| |
| base::ProcessId ChannelMojo::GetSelfPID() const { |
| return bootstrap_->GetSelfPID(); |
| } |
| |
| void ChannelMojo::OnMessageReceived(const 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 -1; |
| } |
| |
| base::ScopedFD ChannelMojo::TakeClientFileDescriptor() { |
| return base::ScopedFD(GetClientFileDescriptor()); |
| } |
| #endif // defined(OS_POSIX) && !defined(OS_NACL) |
| |
| // static |
| MojoResult ChannelMojo::ReadFromMessageAttachmentSet( |
| Message* message, |
| mojo::Array<mojo::ScopedHandle>* 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->HasAttachments()) { |
| MessageAttachmentSet* set = message->attachment_set(); |
| for (unsigned i = 0; i < set->num_non_brokerable_attachments(); ++i) { |
| scoped_refptr<MessageAttachment> attachment = |
| set->GetNonBrokerableAttachmentAt(i); |
| switch (attachment->GetType()) { |
| case MessageAttachment::TYPE_PLATFORM_FILE: |
| #if defined(OS_POSIX) && !defined(OS_NACL) |
| { |
| base::ScopedFD file = |
| TakeOrDupFile(static_cast<IPC::internal::PlatformFileAttachment*>( |
| attachment.get())); |
| if (!file.is_valid()) { |
| DPLOG(WARNING) << "Failed to dup FD to transmit."; |
| set->CommitAllDescriptors(); |
| return MOJO_RESULT_UNKNOWN; |
| } |
| |
| MojoHandle wrapped_handle; |
| MojoResult wrap_result = mojo::edk::CreatePlatformHandleWrapper( |
| mojo::edk::ScopedPlatformHandle( |
| mojo::edk::PlatformHandle(file.release())), |
| &wrapped_handle); |
| if (MOJO_RESULT_OK != wrap_result) { |
| LOG(WARNING) << "Pipe failed to wrap handles. Closing: " |
| << wrap_result; |
| set->CommitAllDescriptors(); |
| return wrap_result; |
| } |
| |
| handles->push_back( |
| mojo::MakeScopedHandle(mojo::Handle(wrapped_handle))); |
| } |
| #else |
| NOTREACHED(); |
| #endif // defined(OS_POSIX) && !defined(OS_NACL) |
| break; |
| case MessageAttachment::TYPE_MOJO_HANDLE: { |
| mojo::ScopedHandle handle = |
| static_cast<IPC::internal::MojoHandleAttachment*>( |
| attachment.get())->TakeHandle(); |
| handles->push_back(std::move(handle)); |
| } break; |
| case MessageAttachment::TYPE_BROKERABLE_ATTACHMENT: |
| // Brokerable attachments are handled by the AttachmentBroker so |
| // there's no need to do anything here. |
| NOTREACHED(); |
| break; |
| } |
| } |
| |
| set->CommitAllDescriptors(); |
| } |
| |
| return MOJO_RESULT_OK; |
| } |
| |
| // static |
| MojoResult ChannelMojo::WriteToMessageAttachmentSet( |
| mojo::Array<mojo::ScopedHandle> handle_buffer, |
| Message* message) { |
| for (size_t i = 0; i < handle_buffer.size(); ++i) { |
| bool ok = message->attachment_set()->AddAttachment( |
| new IPC::internal::MojoHandleAttachment(std::move(handle_buffer[i]))); |
| DCHECK(ok); |
| if (!ok) { |
| LOG(ERROR) << "Failed to add new Mojo handle."; |
| return MOJO_RESULT_UNKNOWN; |
| } |
| } |
| |
| return MOJO_RESULT_OK; |
| } |
| |
| } // namespace IPC |