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// 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_mojo_bootstrap.h"
#include <stdint.h>
#include <utility>
#include "base/logging.h"
#include "base/macros.h"
#include "base/process/process_handle.h"
#include "build/build_config.h"
#include "ipc/ipc_message_utils.h"
#include "ipc/ipc_platform_file.h"
#include "mojo/edk/embedder/embedder.h"
#include "mojo/edk/embedder/platform_channel_pair.h"
#include "mojo/public/cpp/bindings/binding.h"
namespace IPC {
namespace {
// MojoBootstrap for the server process. You should create the instance
// using MojoBootstrap::Create().
class MojoServerBootstrap : public MojoBootstrap {
public:
MojoServerBootstrap();
private:
// MojoBootstrap implementation.
void Connect() override;
void OnInitDone(int32_t peer_pid);
mojom::BootstrapPtr bootstrap_;
IPC::mojom::ChannelAssociatedPtrInfo send_channel_;
IPC::mojom::ChannelAssociatedRequest receive_channel_request_;
DISALLOW_COPY_AND_ASSIGN(MojoServerBootstrap);
};
MojoServerBootstrap::MojoServerBootstrap() = default;
void MojoServerBootstrap::Connect() {
DCHECK_EQ(state(), STATE_INITIALIZED);
bootstrap_.Bind(mojom::BootstrapPtrInfo(TakeHandle(), 0));
bootstrap_.set_connection_error_handler(
base::Bind(&MojoServerBootstrap::Fail, base::Unretained(this)));
IPC::mojom::ChannelAssociatedRequest send_channel_request;
IPC::mojom::ChannelAssociatedPtrInfo receive_channel;
bootstrap_.associated_group()->CreateAssociatedInterface(
mojo::AssociatedGroup::WILL_PASS_REQUEST, &send_channel_,
&send_channel_request);
bootstrap_.associated_group()->CreateAssociatedInterface(
mojo::AssociatedGroup::WILL_PASS_PTR, &receive_channel,
&receive_channel_request_);
bootstrap_->Init(
std::move(send_channel_request), std::move(receive_channel),
GetSelfPID(),
base::Bind(&MojoServerBootstrap::OnInitDone, base::Unretained(this)));
set_state(STATE_WAITING_ACK);
}
void MojoServerBootstrap::OnInitDone(int32_t peer_pid) {
if (state() != STATE_WAITING_ACK) {
set_state(STATE_ERROR);
LOG(ERROR) << "Got inconsistent message from client.";
return;
}
set_state(STATE_READY);
bootstrap_.set_connection_error_handler(mojo::Closure());
delegate()->OnPipesAvailable(std::move(send_channel_),
std::move(receive_channel_request_), peer_pid);
}
// MojoBootstrap for client processes. You should create the instance
// using MojoBootstrap::Create().
class MojoClientBootstrap : public MojoBootstrap, public mojom::Bootstrap {
public:
MojoClientBootstrap();
private:
// MojoBootstrap implementation.
void Connect() override;
// mojom::Bootstrap implementation.
void Init(mojom::ChannelAssociatedRequest receive_channel,
mojom::ChannelAssociatedPtrInfo send_channel,
int32_t peer_pid,
const mojo::Callback<void(int32_t)>& callback) override;
mojo::Binding<mojom::Bootstrap> binding_;
DISALLOW_COPY_AND_ASSIGN(MojoClientBootstrap);
};
MojoClientBootstrap::MojoClientBootstrap() : binding_(this) {}
void MojoClientBootstrap::Connect() {
binding_.Bind(TakeHandle());
binding_.set_connection_error_handler(
base::Bind(&MojoClientBootstrap::Fail, base::Unretained(this)));
}
void MojoClientBootstrap::Init(mojom::ChannelAssociatedRequest receive_channel,
mojom::ChannelAssociatedPtrInfo send_channel,
int32_t peer_pid,
const mojo::Callback<void(int32_t)>& callback) {
callback.Run(GetSelfPID());
set_state(STATE_READY);
binding_.set_connection_error_handler(mojo::Closure());
delegate()->OnPipesAvailable(std::move(send_channel),
std::move(receive_channel), peer_pid);
}
} // namespace
// MojoBootstrap
// static
scoped_ptr<MojoBootstrap> MojoBootstrap::Create(
mojo::ScopedMessagePipeHandle handle,
Channel::Mode mode,
Delegate* delegate) {
CHECK(mode == Channel::MODE_CLIENT || mode == Channel::MODE_SERVER);
scoped_ptr<MojoBootstrap> self =
mode == Channel::MODE_CLIENT
? scoped_ptr<MojoBootstrap>(new MojoClientBootstrap())
: scoped_ptr<MojoBootstrap>(new MojoServerBootstrap());
self->Init(std::move(handle), delegate);
return self;
}
MojoBootstrap::MojoBootstrap() : delegate_(NULL), state_(STATE_INITIALIZED) {
}
MojoBootstrap::~MojoBootstrap() {}
void MojoBootstrap::Init(mojo::ScopedMessagePipeHandle handle,
Delegate* delegate) {
handle_ = std::move(handle);
delegate_ = delegate;
}
base::ProcessId MojoBootstrap::GetSelfPID() const {
#if defined(OS_LINUX)
if (int global_pid = Channel::GetGlobalPid())
return global_pid;
#endif // OS_LINUX
return base::GetCurrentProcId();
}
void MojoBootstrap::Fail() {
set_state(STATE_ERROR);
delegate()->OnBootstrapError();
}
bool MojoBootstrap::HasFailed() const {
return state() == STATE_ERROR;
}
mojo::ScopedMessagePipeHandle MojoBootstrap::TakeHandle() {
return std::move(handle_);
}
} // namespace IPC
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