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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 "content/renderer/pepper/pepper_in_process_router.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "content/public/renderer/render_thread.h"
#include "content/renderer/pepper/renderer_ppapi_host_impl.h"
#include "content/renderer/render_frame_impl.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_sender.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/shared_impl/ppapi_globals.h"
#include "ppapi/shared_impl/resource_tracker.h"
using ppapi::UnpackMessage;
namespace content {
class PepperInProcessRouter::Channel : public IPC::Sender {
public:
Channel(const base::Callback<bool(IPC::Message*)>& callback)
: callback_(callback) {}
virtual ~Channel() {}
virtual bool Send(IPC::Message* message) OVERRIDE {
return callback_.Run(message);
}
private:
base::Callback<bool(IPC::Message*)> callback_;
};
PepperInProcessRouter::PepperInProcessRouter(
RendererPpapiHostImpl* host_impl)
: host_impl_(host_impl),
pending_message_id_(0),
reply_result_(false),
weak_factory_(this) {
browser_channel_.reset(
new Channel(base::Bind(&PepperInProcessRouter::SendToBrowser,
base::Unretained(this))));
host_to_plugin_router_.reset(
new Channel(base::Bind(&PepperInProcessRouter::SendToPlugin,
base::Unretained(this))));
plugin_to_host_router_.reset(
new Channel(base::Bind(&PepperInProcessRouter::SendToHost,
base::Unretained(this))));
}
PepperInProcessRouter::~PepperInProcessRouter() {
}
IPC::Sender* PepperInProcessRouter::GetPluginToRendererSender() {
return plugin_to_host_router_.get();
}
IPC::Sender* PepperInProcessRouter::GetRendererToPluginSender() {
return host_to_plugin_router_.get();
}
ppapi::proxy::Connection PepperInProcessRouter::GetPluginConnection(
PP_Instance instance) {
int routing_id = 0;
RenderFrame* frame = host_impl_->GetRenderFrameForInstance(instance);
if (frame)
routing_id = frame->GetRoutingID();
return ppapi::proxy::Connection(browser_channel_.get(),
plugin_to_host_router_.get(),
routing_id);
}
// static
bool PepperInProcessRouter::OnPluginMsgReceived(const IPC::Message& msg) {
// Emulate the proxy by dispatching the relevant message here.
ppapi::proxy::ResourceMessageReplyParams reply_params;
IPC::Message nested_msg;
if (msg.type() == PpapiPluginMsg_ResourceReply::ID) {
// Resource reply from the renderer (no routing id).
if (!UnpackMessage<PpapiPluginMsg_ResourceReply>(msg, &reply_params,
&nested_msg)) {
NOTREACHED();
return false;
}
} else if (msg.type() == PpapiHostMsg_InProcessResourceReply::ID) {
// Resource reply from the browser (has a routing id).
if (!UnpackMessage<PpapiHostMsg_InProcessResourceReply>(msg, &reply_params,
&nested_msg)) {
NOTREACHED();
return false;
}
} else {
return false;
}
ppapi::Resource* resource =
ppapi::PpapiGlobals::Get()->GetResourceTracker()->GetResource(
reply_params.pp_resource());
// If the resource doesn't exist, it may have been destroyed so just ignore
// the message.
if (resource)
resource->OnReplyReceived(reply_params, nested_msg);
return true;
}
bool PepperInProcessRouter::SendToHost(IPC::Message* msg) {
scoped_ptr<IPC::Message> message(msg);
if (!message->is_sync()) {
// If this is a resource destroyed message, post a task to dispatch it.
// Dispatching it synchronously can cause the host to re-enter the proxy
// code while we're still in the resource destructor, leading to a crash.
// http://crbug.com/276368.
// This won't cause message reordering problems because the resource
// destroyed message is always the last one sent for a resource.
if (message->type() == PpapiHostMsg_ResourceDestroyed::ID) {
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&PepperInProcessRouter::DispatchHostMsg,
weak_factory_.GetWeakPtr(),
base::Owned(message.release())));
return true;
} else {
bool result = host_impl_->GetPpapiHost()->OnMessageReceived(*message);
DCHECK(result) << "The message was not handled by the host.";
return true;
}
}
pending_message_id_ = IPC::SyncMessage::GetMessageId(*message);
reply_deserializer_.reset(
static_cast<IPC::SyncMessage*>(message.get())->GetReplyDeserializer());
reply_result_ = false;
bool result = host_impl_->GetPpapiHost()->OnMessageReceived(*message);
DCHECK(result) << "The message was not handled by the host.";
pending_message_id_ = 0;
reply_deserializer_.reset(NULL);
return reply_result_;
}
bool PepperInProcessRouter::SendToPlugin(IPC::Message* msg) {
scoped_ptr<IPC::Message> message(msg);
CHECK(!msg->is_sync());
if (IPC::SyncMessage::IsMessageReplyTo(*message, pending_message_id_)) {
if (!msg->is_reply_error())
reply_result_ = reply_deserializer_->SerializeOutputParameters(*message);
} else {
CHECK(!pending_message_id_);
// Dispatch plugin messages from the message loop.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&PepperInProcessRouter::DispatchPluginMsg,
weak_factory_.GetWeakPtr(),
base::Owned(message.release())));
}
return true;
}
void PepperInProcessRouter::DispatchHostMsg(IPC::Message* msg) {
bool handled = host_impl_->GetPpapiHost()->OnMessageReceived(*msg);
DCHECK(handled);
}
void PepperInProcessRouter::DispatchPluginMsg(IPC::Message* msg) {
bool handled = OnPluginMsgReceived(*msg);
DCHECK(handled);
}
bool PepperInProcessRouter::SendToBrowser(IPC::Message *msg) {
return RenderThread::Get()->Send(msg);
}
} // namespace content
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