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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.
#ifndef CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
#define CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
#include <stdint.h>
#include <queue>
#include <vector>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/process/process.h"
#include "base/strings/string16.h"
#include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
#include "content/browser/renderer_host/pepper/pepper_message_filter.h"
#include "content/public/browser/browser_child_process_host_delegate.h"
#include "content/public/browser/browser_child_process_host_iterator.h"
#include "ipc/ipc_sender.h"
#include "ppapi/shared_impl/ppapi_permissions.h"
namespace content {
class BrowserChildProcessHostImpl;
class ResourceContext;
struct PepperPluginInfo;
// Process host for PPAPI plugin and broker processes.
// When used for the broker, interpret all references to "plugin" with "broker".
class PpapiPluginProcessHost : public BrowserChildProcessHostDelegate,
public IPC::Sender {
public:
class Client {
public:
// Gets the information about the renderer that's requesting the channel.
virtual void GetPpapiChannelInfo(base::ProcessHandle* renderer_handle,
int* renderer_id) = 0;
// Called when the channel is asynchronously opened to the plugin or on
// error. On error, the parameters should be:
// base::kNullProcessHandle
// IPC::ChannelHandle(),
// 0
virtual void OnPpapiChannelOpened(
const IPC::ChannelHandle& channel_handle,
base::ProcessId plugin_pid,
int plugin_child_id) = 0;
// Returns true if the current connection is off-the-record.
virtual bool OffTheRecord() = 0;
protected:
virtual ~Client() {}
};
class PluginClient : public Client {
public:
// Returns the resource context for the renderer requesting the channel.
virtual ResourceContext* GetResourceContext() = 0;
protected:
~PluginClient() override {}
};
class BrokerClient : public Client {
protected:
~BrokerClient() override {}
};
~PpapiPluginProcessHost() override;
static PpapiPluginProcessHost* CreatePluginHost(
const PepperPluginInfo& info,
const base::FilePath& profile_data_directory);
static PpapiPluginProcessHost* CreateBrokerHost(
const PepperPluginInfo& info);
// Notification that a PP_Instance has been created and the associated
// renderer related data including the RenderView/Process pair for the given
// plugin. This is necessary so that when the plugin calls us with a
// PP_Instance we can find the RenderView associated with it without trusting
// the plugin.
static void DidCreateOutOfProcessInstance(
int plugin_process_id,
int32_t pp_instance,
const PepperRendererInstanceData& instance_data);
// The opposite of DIdCreate... above.
static void DidDeleteOutOfProcessInstance(int plugin_process_id,
int32_t pp_instance);
// Notification that a Plugin instance has been throttled or unthrottled.
static void OnPluginInstanceThrottleStateChange(int plugin_process_id,
int32_t pp_instance,
bool is_throttled);
// Returns the instances that match the specified process name.
// It can only be called on the IO thread.
static void FindByName(const base::string16& name,
std::vector<PpapiPluginProcessHost*>* hosts);
// IPC::Sender implementation:
bool Send(IPC::Message* message) override;
// Opens a new channel to the plugin. The client will be notified when the
// channel is ready or if there's an error.
void OpenChannelToPlugin(Client* client);
BrowserPpapiHostImpl* host_impl() { return host_impl_.get(); }
const BrowserChildProcessHostImpl* process() { return process_.get(); }
const base::FilePath& plugin_path() const { return plugin_path_; }
const base::FilePath& profile_data_directory() const {
return profile_data_directory_;
}
#if defined(OS_POSIX) && !defined(OS_ANDROID) && !defined(OS_MACOSX)
// Launch the zygote early in the browser startup.
static void EarlyZygoteLaunch();
#endif // defined(OS_POSIX) && !defined(OS_ANDROID) && !defined(OS_MACOSX)
// The client pointer must remain valid until its callback is issued.
private:
class PluginNetworkObserver;
// Constructors for plugin and broker process hosts, respectively.
// You must call Init before doing anything else.
PpapiPluginProcessHost(const PepperPluginInfo& info,
const base::FilePath& profile_data_directory);
PpapiPluginProcessHost();
// Actually launches the process with the given plugin info. Returns true
// on success (the process was spawned).
bool Init(const PepperPluginInfo& info);
void RequestPluginChannel(Client* client);
void OnProcessLaunched() override;
void OnProcessCrashed(int exit_code) override;
bool OnMessageReceived(const IPC::Message& msg) override;
void OnChannelConnected(int32_t peer_pid) override;
void OnChannelError() override;
void CancelRequests();
// IPC message handlers.
void OnRendererPluginChannelCreated(const IPC::ChannelHandle& handle);
// Handles most requests from the plugin. May be NULL.
scoped_refptr<PepperMessageFilter> filter_;
ppapi::PpapiPermissions permissions_;
scoped_ptr<BrowserPpapiHostImpl> host_impl_;
// Observes network changes. May be NULL.
scoped_ptr<PluginNetworkObserver> network_observer_;
// Channel requests that we are waiting to send to the plugin process once
// the channel is opened.
std::vector<Client*> pending_requests_;
// Channel requests that we have already sent to the plugin process, but
// haven't heard back about yet.
std::queue<Client*> sent_requests_;
// Path to the plugin library.
base::FilePath plugin_path_;
// Path to the top-level plugin data directory (differs based upon profile).
base::FilePath profile_data_directory_;
const bool is_broker_;
scoped_ptr<BrowserChildProcessHostImpl> process_;
DISALLOW_COPY_AND_ASSIGN(PpapiPluginProcessHost);
};
class PpapiPluginProcessHostIterator
: public BrowserChildProcessHostTypeIterator<
PpapiPluginProcessHost> {
public:
PpapiPluginProcessHostIterator()
: BrowserChildProcessHostTypeIterator<
PpapiPluginProcessHost>(PROCESS_TYPE_PPAPI_PLUGIN) {}
};
class PpapiBrokerProcessHostIterator
: public BrowserChildProcessHostTypeIterator<
PpapiPluginProcessHost> {
public:
PpapiBrokerProcessHostIterator()
: BrowserChildProcessHostTypeIterator<
PpapiPluginProcessHost>(PROCESS_TYPE_PPAPI_BROKER) {}
};
} // namespace content
#endif // CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
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