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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 "ppapi/nacl_irt/ppapi_dispatcher.h"
#include <stddef.h>
#include <map>
#include <set>
#include "base/command_line.h"
#include "base/memory/ref_counted.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
#include "build/build_config.h"
#include "components/tracing/child/child_trace_message_filter.h"
#include "ipc/ipc_channel_handle.h"
#include "ipc/ipc_logging.h"
#include "ipc/ipc_message.h"
#include "ppapi/c/ppp.h"
#include "ppapi/c/ppp_instance.h"
#include "ppapi/nacl_irt/manifest_service.h"
#include "ppapi/nacl_irt/plugin_startup.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/plugin_globals.h"
#include "ppapi/proxy/plugin_message_filter.h"
#include "ppapi/proxy/plugin_proxy_delegate.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/resource_reply_thread_registrar.h"
namespace ppapi {
PpapiDispatcher::PpapiDispatcher(
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
base::WaitableEvent* shutdown_event,
IPC::ChannelHandle browser_ipc_handle,
IPC::ChannelHandle renderer_ipc_handle)
: next_plugin_dispatcher_id_(0),
task_runner_(io_task_runner),
shutdown_event_(shutdown_event),
renderer_ipc_handle_(renderer_ipc_handle) {
proxy::PluginGlobals* globals = proxy::PluginGlobals::Get();
// Delay initializing the SyncChannel until after we add filters. This
// ensures that the filters won't miss any messages received by
// the channel.
channel_ =
IPC::SyncChannel::Create(this, GetIPCTaskRunner(), GetShutdownEvent());
scoped_refptr<ppapi::proxy::PluginMessageFilter> plugin_filter(
new ppapi::proxy::PluginMessageFilter(
NULL, globals->resource_reply_thread_registrar()));
channel_->AddFilter(plugin_filter.get());
globals->RegisterResourceMessageFilters(plugin_filter.get());
channel_->AddFilter(new tracing::ChildTraceMessageFilter(task_runner_.get()));
channel_->Init(browser_ipc_handle, IPC::Channel::MODE_SERVER, true);
}
base::SingleThreadTaskRunner* PpapiDispatcher::GetIPCTaskRunner() {
return task_runner_.get();
}
base::WaitableEvent* PpapiDispatcher::GetShutdownEvent() {
return shutdown_event_;
}
IPC::PlatformFileForTransit PpapiDispatcher::ShareHandleWithRemote(
base::PlatformFile handle,
base::ProcessId peer_pid,
bool should_close_source) {
return IPC::InvalidPlatformFileForTransit();
}
base::SharedMemoryHandle PpapiDispatcher::ShareSharedMemoryHandleWithRemote(
const base::SharedMemoryHandle& handle,
base::ProcessId remote_pid) {
return base::SharedMemory::NULLHandle();
}
std::set<PP_Instance>* PpapiDispatcher::GetGloballySeenInstanceIDSet() {
return &instances_;
}
uint32_t PpapiDispatcher::Register(proxy::PluginDispatcher* plugin_dispatcher) {
if (!plugin_dispatcher ||
plugin_dispatchers_.size() >= std::numeric_limits<uint32_t>::max()) {
return 0;
}
uint32_t id = 0;
do {
// Although it is unlikely, make sure that we won't cause any trouble
// when the counter overflows.
id = next_plugin_dispatcher_id_++;
} while (id == 0 ||
plugin_dispatchers_.find(id) != plugin_dispatchers_.end());
plugin_dispatchers_[id] = plugin_dispatcher;
return id;
}
void PpapiDispatcher::Unregister(uint32_t plugin_dispatcher_id) {
plugin_dispatchers_.erase(plugin_dispatcher_id);
}
IPC::Sender* PpapiDispatcher::GetBrowserSender() {
return this;
}
std::string PpapiDispatcher::GetUILanguage() {
NOTIMPLEMENTED();
return std::string();
}
void PpapiDispatcher::PreCacheFontForFlash(const void* logfontw) {
NOTIMPLEMENTED();
}
void PpapiDispatcher::SetActiveURL(const std::string& url) {
NOTIMPLEMENTED();
}
PP_Resource PpapiDispatcher::CreateBrowserFont(
proxy::Connection connection,
PP_Instance instance,
const PP_BrowserFont_Trusted_Description& desc,
const Preferences& prefs) {
NOTIMPLEMENTED();
return 0;
}
bool PpapiDispatcher::OnMessageReceived(const IPC::Message& msg) {
IPC_BEGIN_MESSAGE_MAP(PpapiDispatcher, msg)
IPC_MESSAGE_HANDLER(PpapiMsg_InitializeNaClDispatcher,
OnMsgInitializeNaClDispatcher)
// All other messages are simply forwarded to a PluginDispatcher.
IPC_MESSAGE_UNHANDLED(OnPluginDispatcherMessageReceived(msg))
IPC_END_MESSAGE_MAP()
return true;
}
void PpapiDispatcher::OnChannelError() {
exit(1);
}
bool PpapiDispatcher::Send(IPC::Message* msg) {
return channel_->Send(msg);
}
void PpapiDispatcher::OnMsgInitializeNaClDispatcher(
const PpapiNaClPluginArgs& args) {
static bool command_line_and_logging_initialized = false;
if (command_line_and_logging_initialized) {
LOG(FATAL) << "InitializeNaClDispatcher must be called once per plugin.";
return;
}
command_line_and_logging_initialized = true;
base::CommandLine::Init(0, NULL);
for (size_t i = 0; i < args.switch_names.size(); ++i) {
DCHECK(i < args.switch_values.size());
base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
args.switch_names[i], args.switch_values[i]);
}
logging::LoggingSettings settings;
settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
logging::InitLogging(settings);
proxy::PluginGlobals::Get()->set_keepalive_throttle_interval_milliseconds(
args.keepalive_throttle_interval_milliseconds);
// Tell the process-global GetInterface which interfaces it can return to the
// plugin.
proxy::InterfaceList::SetProcessGlobalPermissions(args.permissions);
int32_t error = ::PPP_InitializeModule(
0 /* module */,
&proxy::PluginDispatcher::GetBrowserInterface);
if (error)
::exit(error);
proxy::PluginDispatcher* dispatcher =
new proxy::PluginDispatcher(::PPP_GetInterface, args.permissions,
args.off_the_record);
if (!dispatcher->InitPluginWithChannel(this, base::kNullProcessId,
renderer_ipc_handle_, false)) {
delete dispatcher;
return;
}
// From here, the dispatcher will manage its own lifetime according to the
// lifetime of the attached channel.
// Notify the renderer process, if necessary.
ManifestService* manifest_service = GetManifestService();
if (manifest_service)
manifest_service->StartupInitializationComplete();
}
void PpapiDispatcher::OnPluginDispatcherMessageReceived(
const IPC::Message& msg) {
// The first parameter should be a plugin dispatcher ID.
base::PickleIterator iter(msg);
uint32_t id = 0;
if (!iter.ReadUInt32(&id)) {
NOTREACHED();
return;
}
std::map<uint32_t, proxy::PluginDispatcher*>::iterator dispatcher =
plugin_dispatchers_.find(id);
if (dispatcher != plugin_dispatchers_.end())
dispatcher->second->OnMessageReceived(msg);
}
} // namespace ppapi
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