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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 "chrome/service/service_ipc_server.h"
#include "base/metrics/histogram_delta_serialization.h"
#include "build/build_config.h"
#include "chrome/common/service_messages.h"
#include "ipc/ipc_logging.h"
ServiceIPCServer::ServiceIPCServer(
Client* client,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
const IPC::ChannelHandle& channel_handle,
base::WaitableEvent* shutdown_event)
: client_(client),
io_task_runner_(io_task_runner),
channel_handle_(channel_handle),
shutdown_event_(shutdown_event),
ipc_client_connected_(false) {
DCHECK(client);
DCHECK(shutdown_event);
}
bool ServiceIPCServer::Init() {
#ifdef IPC_MESSAGE_LOG_ENABLED
IPC::Logging::GetInstance()->SetIPCSender(this);
#endif
CreateChannel();
return true;
}
void ServiceIPCServer::CreateChannel() {
channel_.reset(); // Tear down the existing channel, if any.
channel_ = IPC::SyncChannel::Create(
channel_handle_,
IPC::Channel::MODE_NAMED_SERVER,
this /* listener */,
io_task_runner_,
true /* create_pipe_now */,
shutdown_event_);
}
ServiceIPCServer::~ServiceIPCServer() {
#ifdef IPC_MESSAGE_LOG_ENABLED
IPC::Logging::GetInstance()->SetIPCSender(NULL);
#endif
}
void ServiceIPCServer::OnChannelConnected(int32_t peer_pid) {
DCHECK(!ipc_client_connected_);
ipc_client_connected_ = true;
}
void ServiceIPCServer::OnChannelError() {
// When an IPC client (typically a browser process) disconnects, the pipe is
// closed and we get an OnChannelError. If we want to keep servicing requests,
// we will recreate the channel if necessary.
bool client_was_connected = ipc_client_connected_;
ipc_client_connected_ = false;
if (client_was_connected) {
if (client_->OnIPCClientDisconnect()) {
#if defined(OS_WIN)
// On Windows, once an error on a named pipe occurs, the named pipe is no
// longer valid and must be re-created. This is not the case on Mac or
// Linux.
CreateChannel();
#endif
}
} else {
// If the client was never even connected we had an error connecting.
if (!ipc_client_connected_) {
LOG(ERROR) << "Unable to open service ipc channel "
<< "named: " << channel_handle_.name;
}
}
}
bool ServiceIPCServer::Send(IPC::Message* msg) {
if (!channel_.get()) {
delete msg;
return false;
}
return channel_->Send(msg);
}
void ServiceIPCServer::AddMessageHandler(scoped_ptr<MessageHandler> handler) {
message_handlers_.push_back(handler.release());
}
bool ServiceIPCServer::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
// When we get a message, always mark the IPC client as connected. The
// ChannelProxy::Context is only letting OnChannelConnected get called once,
// so on Mac and Linux, we never would set ipc_client_connected_ to true
// again on subsequent connections.
ipc_client_connected_ = true;
IPC_BEGIN_MESSAGE_MAP(ServiceIPCServer, msg)
IPC_MESSAGE_HANDLER(ServiceMsg_GetHistograms, OnGetHistograms)
IPC_MESSAGE_HANDLER(ServiceMsg_Shutdown, OnShutdown);
IPC_MESSAGE_HANDLER(ServiceMsg_UpdateAvailable, OnUpdateAvailable);
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
if (!handled) {
// Make a copy of the handlers to prevent modification during iteration.
std::vector<MessageHandler*> temp_handlers = message_handlers_.get();
for (const auto& handler : temp_handlers) {
handled = handler->HandleMessage(msg);
if (handled)
break;
}
}
return handled;
}
void ServiceIPCServer::OnGetHistograms() {
if (!histogram_delta_serializer_) {
histogram_delta_serializer_.reset(
new base::HistogramDeltaSerialization("ServiceProcess"));
}
std::vector<std::string> deltas;
// "false" to PerpareAndSerializeDeltas() indicates to *not* include
// histograms held in persistent storage on the assumption that they will be
// visible to the recipient through other means.
histogram_delta_serializer_->PrepareAndSerializeDeltas(&deltas, false);
channel_->Send(new ServiceHostMsg_Histograms(deltas));
}
void ServiceIPCServer::OnShutdown() {
client_->OnShutdown();
}
void ServiceIPCServer::OnUpdateAvailable() {
client_->OnUpdateAvailable();
}
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