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// Copyright (c) 2006-2008 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/plugin/plugin_channel.h"
#include "base/command_line.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "build/build_config.h"
#include "chrome/common/child_process.h"
#include "chrome/common/plugin_messages.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/plugin/plugin_thread.h"
#if defined(OS_POSIX)
#include "ipc/ipc_channel_posix.h"
#endif
PluginChannel* PluginChannel::GetPluginChannel(
int process_id, MessageLoop* ipc_message_loop) {
// map renderer's process id to a (single) channel to that process
std::string channel_name = StringPrintf(
"%d.r%d", base::GetCurrentProcId(), process_id);
return static_cast<PluginChannel*>(PluginChannelBase::GetChannel(
channel_name,
IPC::Channel::MODE_SERVER,
ClassFactory,
ipc_message_loop,
false));
}
PluginChannel::PluginChannel()
: renderer_handle_(0),
#if defined(OS_POSIX)
renderer_fd_(-1),
#endif
in_send_(0),
off_the_record_(false) {
SendUnblockingOnlyDuringDispatch();
ChildProcess::current()->AddRefProcess();
const CommandLine* command_line = CommandLine::ForCurrentProcess();
log_messages_ = command_line->HasSwitch(switches::kLogPluginMessages);
}
PluginChannel::~PluginChannel() {
if (renderer_handle_)
base::CloseProcessHandle(renderer_handle_);
#if defined(OS_POSIX)
IPC::RemoveAndCloseChannelSocket(channel_name());
// If we still have the renderer FD, close it.
if (renderer_fd_ != -1) {
close(renderer_fd_);
}
#endif
ChildProcess::current()->ReleaseProcess();
}
bool PluginChannel::Send(IPC::Message* msg) {
in_send_++;
if (log_messages_) {
LOG(INFO) << "sending message @" << msg << " on channel @" << this
<< " with type " << msg->type();
}
bool result = PluginChannelBase::Send(msg);
in_send_--;
return result;
}
void PluginChannel::OnMessageReceived(const IPC::Message& msg) {
if (log_messages_) {
LOG(INFO) << "received message @" << &msg << " on channel @" << this
<< " with type " << msg.type();
}
PluginChannelBase::OnMessageReceived(msg);
}
void PluginChannel::OnControlMessageReceived(const IPC::Message& msg) {
IPC_BEGIN_MESSAGE_MAP(PluginChannel, msg)
IPC_MESSAGE_HANDLER(PluginMsg_CreateInstance, OnCreateInstance)
IPC_MESSAGE_HANDLER_DELAY_REPLY(PluginMsg_DestroyInstance,
OnDestroyInstance)
IPC_MESSAGE_HANDLER(PluginMsg_GenerateRouteID, OnGenerateRouteID)
IPC_MESSAGE_UNHANDLED_ERROR()
IPC_END_MESSAGE_MAP()
}
void PluginChannel::OnCreateInstance(const std::string& mime_type,
int* instance_id) {
*instance_id = GenerateRouteID();
scoped_refptr<WebPluginDelegateStub> stub = new WebPluginDelegateStub(
mime_type, *instance_id, this);
AddRoute(*instance_id, stub, false);
plugin_stubs_.push_back(stub);
}
void PluginChannel::OnDestroyInstance(int instance_id,
IPC::Message* reply_msg) {
for (size_t i = 0; i < plugin_stubs_.size(); ++i) {
if (plugin_stubs_[i]->instance_id() == instance_id) {
plugin_stubs_.erase(plugin_stubs_.begin() + i);
RemoveRoute(instance_id);
Send(reply_msg);
return;
}
}
NOTREACHED() << "Couldn't find WebPluginDelegateStub to destroy";
}
void PluginChannel::OnGenerateRouteID(int* route_id) {
*route_id = GenerateRouteID();
}
int PluginChannel::GenerateRouteID() {
static int last_id = 0;
return ++last_id;
}
void PluginChannel::OnChannelConnected(int32 peer_pid) {
base::ProcessHandle handle;
if (!base::OpenProcessHandle(peer_pid, &handle)) {
NOTREACHED();
}
renderer_handle_ = handle;
PluginChannelBase::OnChannelConnected(peer_pid);
}
void PluginChannel::OnChannelError() {
base::CloseProcessHandle(renderer_handle_);
renderer_handle_ = 0;
PluginChannelBase::OnChannelError();
CleanUp();
}
void PluginChannel::CleanUp() {
// We need to clean up the stubs so that they call NPPDestroy. This will
// also lead to them releasing their reference on this object so that it can
// be deleted.
for (size_t i = 0; i < plugin_stubs_.size(); ++i)
RemoveRoute(plugin_stubs_[i]->instance_id());
// Need to addref this object temporarily because otherwise removing the last
// stub will cause the destructor of this object to be called, however at
// that point plugin_stubs_ will have one element and its destructor will be
// called twice.
scoped_refptr<PluginChannel> me(this);
plugin_stubs_.clear();
}
bool PluginChannel::Init(MessageLoop* ipc_message_loop, bool create_pipe_now) {
#if defined(OS_POSIX)
// This gets called when the PluginChannel is initially created. At this
// point, create the socketpair and assign the plugin side FD to the channel
// name. Keep the renderer side FD as a member variable in the PluginChannel
// to be able to transmit it through IPC.
int plugin_fd;
IPC::SocketPair(&plugin_fd, &renderer_fd_);
IPC::AddChannelSocket(channel_name(), plugin_fd);
#endif
return PluginChannelBase::Init(ipc_message_loop, create_pipe_now);
}
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