| // 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/browser/ppapi_plugin_process_host.h" |
| |
| #include <string> |
| |
| #include "base/base_switches.h" |
| #include "base/command_line.h" |
| #include "base/files/file_path.h" |
| #include "base/metrics/field_trial.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "content/browser/browser_child_process_host_impl.h" |
| #include "content/browser/plugin_service_impl.h" |
| #include "content/browser/renderer_host/render_message_filter.h" |
| #include "content/common/child_process_host_impl.h" |
| #include "content/common/child_process_messages.h" |
| #include "content/public/browser/content_browser_client.h" |
| #include "content/public/common/content_constants.h" |
| #include "content/public/common/content_switches.h" |
| #include "content/public/common/pepper_plugin_info.h" |
| #include "content/public/common/process_type.h" |
| #include "content/public/common/sandboxed_process_launcher_delegate.h" |
| #include "ipc/ipc_switches.h" |
| #include "net/base/network_change_notifier.h" |
| #include "ppapi/proxy/ppapi_messages.h" |
| #include "ui/base/ui_base_switches.h" |
| |
| #if defined(OS_WIN) |
| #include "content/common/sandbox_win.h" |
| #include "sandbox/win/src/sandbox_policy.h" |
| #endif |
| |
| namespace content { |
| |
| // NOTE: changes to this class need to be reviewed by the security team. |
| class PpapiPluginSandboxedProcessLauncherDelegate |
| : public content::SandboxedProcessLauncherDelegate { |
| public: |
| PpapiPluginSandboxedProcessLauncherDelegate(bool is_broker, |
| const PepperPluginInfo& info, |
| ChildProcessHost* host) |
| : |
| #if defined(OS_POSIX) |
| info_(info), |
| ipc_fd_(host->TakeClientFileDescriptor()), |
| #endif // OS_POSIX |
| is_broker_(is_broker) {} |
| |
| virtual ~PpapiPluginSandboxedProcessLauncherDelegate() {} |
| |
| #if defined(OS_WIN) |
| virtual bool ShouldSandbox() OVERRIDE { |
| return !is_broker_; |
| } |
| |
| virtual void PreSpawnTarget(sandbox::TargetPolicy* policy, |
| bool* success) { |
| if (is_broker_) |
| return; |
| // The Pepper process as locked-down as a renderer execpt that it can |
| // create the server side of chrome pipes. |
| sandbox::ResultCode result; |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, |
| sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, |
| L"\\\\.\\pipe\\chrome.*"); |
| *success = (result == sandbox::SBOX_ALL_OK); |
| } |
| |
| #elif defined(OS_POSIX) |
| virtual bool ShouldUseZygote() OVERRIDE { |
| const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); |
| CommandLine::StringType plugin_launcher = browser_command_line |
| .GetSwitchValueNative(switches::kPpapiPluginLauncher); |
| return !is_broker_ && plugin_launcher.empty() && info_.is_sandboxed; |
| } |
| virtual int GetIpcFd() OVERRIDE { |
| return ipc_fd_; |
| } |
| #endif // OS_WIN |
| |
| private: |
| #if defined(OS_POSIX) |
| const PepperPluginInfo& info_; |
| int ipc_fd_; |
| #endif // OS_POSIX |
| bool is_broker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PpapiPluginSandboxedProcessLauncherDelegate); |
| }; |
| |
| class PpapiPluginProcessHost::PluginNetworkObserver |
| : public net::NetworkChangeNotifier::IPAddressObserver, |
| public net::NetworkChangeNotifier::ConnectionTypeObserver { |
| public: |
| explicit PluginNetworkObserver(PpapiPluginProcessHost* process_host) |
| : process_host_(process_host) { |
| net::NetworkChangeNotifier::AddIPAddressObserver(this); |
| net::NetworkChangeNotifier::AddConnectionTypeObserver(this); |
| } |
| |
| virtual ~PluginNetworkObserver() { |
| net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this); |
| net::NetworkChangeNotifier::RemoveIPAddressObserver(this); |
| } |
| |
| // IPAddressObserver implementation. |
| virtual void OnIPAddressChanged() OVERRIDE { |
| // TODO(brettw) bug 90246: This doesn't seem correct. The online/offline |
| // notification seems like it should be sufficient, but I don't see that |
| // when I unplug and replug my network cable. Sending this notification when |
| // "something" changes seems to make Flash reasonably happy, but seems |
| // wrong. We should really be able to provide the real online state in |
| // OnConnectionTypeChanged(). |
| process_host_->Send(new PpapiMsg_SetNetworkState(true)); |
| } |
| |
| // ConnectionTypeObserver implementation. |
| virtual void OnConnectionTypeChanged( |
| net::NetworkChangeNotifier::ConnectionType type) OVERRIDE { |
| process_host_->Send(new PpapiMsg_SetNetworkState( |
| type != net::NetworkChangeNotifier::CONNECTION_NONE)); |
| } |
| |
| private: |
| PpapiPluginProcessHost* const process_host_; |
| }; |
| |
| PpapiPluginProcessHost::~PpapiPluginProcessHost() { |
| DVLOG(1) << "PpapiPluginProcessHost" << (is_broker_ ? "[broker]" : "") |
| << "~PpapiPluginProcessHost()"; |
| CancelRequests(); |
| } |
| |
| // static |
| PpapiPluginProcessHost* PpapiPluginProcessHost::CreatePluginHost( |
| const PepperPluginInfo& info, |
| const base::FilePath& profile_data_directory) { |
| PpapiPluginProcessHost* plugin_host = new PpapiPluginProcessHost( |
| info, profile_data_directory); |
| DCHECK(plugin_host); |
| if (plugin_host->Init(info)) |
| return plugin_host; |
| |
| NOTREACHED(); // Init is not expected to fail. |
| return NULL; |
| } |
| |
| // static |
| PpapiPluginProcessHost* PpapiPluginProcessHost::CreateBrokerHost( |
| const PepperPluginInfo& info) { |
| PpapiPluginProcessHost* plugin_host = |
| new PpapiPluginProcessHost(); |
| if (plugin_host->Init(info)) |
| return plugin_host; |
| |
| NOTREACHED(); // Init is not expected to fail. |
| return NULL; |
| } |
| |
| // static |
| void PpapiPluginProcessHost::DidCreateOutOfProcessInstance( |
| int plugin_process_id, |
| int32 pp_instance, |
| const PepperRendererInstanceData& instance_data) { |
| for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) { |
| if (iter->process_.get() && |
| iter->process_->GetData().id == plugin_process_id) { |
| // Found the plugin. |
| iter->host_impl_->AddInstance(pp_instance, instance_data); |
| return; |
| } |
| } |
| // We'll see this passed with a 0 process ID for the browser tag stuff that |
| // is currently in the process of being removed. |
| // |
| // TODO(brettw) When old browser tag impl is removed |
| // (PepperPluginDelegateImpl::CreateBrowserPluginModule passes a 0 plugin |
| // process ID) this should be converted to a NOTREACHED(). |
| DCHECK(plugin_process_id == 0) |
| << "Renderer sent a bad plugin process host ID"; |
| } |
| |
| // static |
| void PpapiPluginProcessHost::DidDeleteOutOfProcessInstance( |
| int plugin_process_id, |
| int32 pp_instance) { |
| for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) { |
| if (iter->process_.get() && |
| iter->process_->GetData().id == plugin_process_id) { |
| // Found the plugin. |
| iter->host_impl_->DeleteInstance(pp_instance); |
| return; |
| } |
| } |
| // Note: It's possible that the plugin process has already been deleted by |
| // the time this message is received. For example, it could have crashed. |
| // That's OK, we can just ignore this message. |
| } |
| |
| // static |
| void PpapiPluginProcessHost::FindByName( |
| const base::string16& name, |
| std::vector<PpapiPluginProcessHost*>* hosts) { |
| for (PpapiPluginProcessHostIterator iter; !iter.Done(); ++iter) { |
| if (iter->process_.get() && iter->process_->GetData().name == name) |
| hosts->push_back(*iter); |
| } |
| } |
| |
| bool PpapiPluginProcessHost::Send(IPC::Message* message) { |
| return process_->Send(message); |
| } |
| |
| void PpapiPluginProcessHost::OpenChannelToPlugin(Client* client) { |
| if (process_->GetHost()->IsChannelOpening()) { |
| // The channel is already in the process of being opened. Put |
| // this "open channel" request into a queue of requests that will |
| // be run once the channel is open. |
| pending_requests_.push_back(client); |
| return; |
| } |
| |
| // We already have an open channel, send a request right away to plugin. |
| RequestPluginChannel(client); |
| } |
| |
| PpapiPluginProcessHost::PpapiPluginProcessHost( |
| const PepperPluginInfo& info, |
| const base::FilePath& profile_data_directory) |
| : profile_data_directory_(profile_data_directory), |
| is_broker_(false) { |
| uint32 base_permissions = info.permissions; |
| |
| // We don't have to do any whitelisting for APIs in this process host, so |
| // don't bother passing a browser context or document url here. |
| if (GetContentClient()->browser()->IsPluginAllowedToUseDevChannelAPIs( |
| NULL, GURL())) |
| base_permissions |= ppapi::PERMISSION_DEV_CHANNEL; |
| permissions_ = ppapi::PpapiPermissions::GetForCommandLine(base_permissions); |
| |
| process_.reset(new BrowserChildProcessHostImpl( |
| PROCESS_TYPE_PPAPI_PLUGIN, this)); |
| |
| host_impl_.reset(new BrowserPpapiHostImpl(this, permissions_, info.name, |
| info.path, profile_data_directory, |
| false /* in_process */, |
| false /* external_plugin */)); |
| |
| filter_ = new PepperMessageFilter(); |
| process_->AddFilter(filter_.get()); |
| process_->GetHost()->AddFilter(host_impl_->message_filter().get()); |
| |
| GetContentClient()->browser()->DidCreatePpapiPlugin(host_impl_.get()); |
| |
| // Only request network status updates if the plugin has dev permissions. |
| if (permissions_.HasPermission(ppapi::PERMISSION_DEV)) |
| network_observer_.reset(new PluginNetworkObserver(this)); |
| } |
| |
| PpapiPluginProcessHost::PpapiPluginProcessHost() |
| : is_broker_(true) { |
| process_.reset(new BrowserChildProcessHostImpl( |
| PROCESS_TYPE_PPAPI_BROKER, this)); |
| |
| ppapi::PpapiPermissions permissions; // No permissions. |
| // The plugin name, path and profile data directory shouldn't be needed for |
| // the broker. |
| host_impl_.reset(new BrowserPpapiHostImpl(this, permissions, |
| std::string(), base::FilePath(), |
| base::FilePath(), |
| false /* in_process */, |
| false /* external_plugin */)); |
| } |
| |
| bool PpapiPluginProcessHost::Init(const PepperPluginInfo& info) { |
| plugin_path_ = info.path; |
| if (info.name.empty()) { |
| process_->SetName(plugin_path_.BaseName().LossyDisplayName()); |
| } else { |
| process_->SetName(base::UTF8ToUTF16(info.name)); |
| } |
| |
| std::string channel_id = process_->GetHost()->CreateChannel(); |
| if (channel_id.empty()) { |
| VLOG(1) << "Could not create pepper host channel."; |
| return false; |
| } |
| |
| const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); |
| CommandLine::StringType plugin_launcher = |
| browser_command_line.GetSwitchValueNative(switches::kPpapiPluginLauncher); |
| |
| #if defined(OS_LINUX) |
| int flags = plugin_launcher.empty() ? ChildProcessHost::CHILD_ALLOW_SELF : |
| ChildProcessHost::CHILD_NORMAL; |
| #else |
| int flags = ChildProcessHost::CHILD_NORMAL; |
| #endif |
| base::FilePath exe_path = ChildProcessHost::GetChildPath(flags); |
| if (exe_path.empty()) { |
| VLOG(1) << "Pepper plugin exe path is empty."; |
| return false; |
| } |
| |
| CommandLine* cmd_line = new CommandLine(exe_path); |
| cmd_line->AppendSwitchASCII(switches::kProcessType, |
| is_broker_ ? switches::kPpapiBrokerProcess |
| : switches::kPpapiPluginProcess); |
| cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id); |
| |
| // These switches are forwarded to both plugin and broker pocesses. |
| static const char* kCommonForwardSwitches[] = { |
| switches::kVModule |
| }; |
| cmd_line->CopySwitchesFrom(browser_command_line, kCommonForwardSwitches, |
| arraysize(kCommonForwardSwitches)); |
| |
| if (!is_broker_) { |
| static const char* kPluginForwardSwitches[] = { |
| switches::kDisableSeccompFilterSandbox, |
| #if defined(OS_MACOSX) |
| switches::kEnableSandboxLogging, |
| #endif |
| switches::kNoSandbox, |
| switches::kPpapiStartupDialog, |
| }; |
| cmd_line->CopySwitchesFrom(browser_command_line, kPluginForwardSwitches, |
| arraysize(kPluginForwardSwitches)); |
| |
| // Copy any flash args over and introduce field trials if necessary. |
| // TODO(vtl): Stop passing flash args in the command line, or windows is |
| // going to explode. |
| std::string field_trial = |
| base::FieldTrialList::FindFullName(kFlashHwVideoDecodeFieldTrialName); |
| std::string existing_args = |
| browser_command_line.GetSwitchValueASCII(switches::kPpapiFlashArgs); |
| if (field_trial == kFlashHwVideoDecodeFieldTrialEnabledName) { |
| // Arguments passed to Flash are comma delimited. |
| if (!existing_args.empty()) |
| existing_args.append(","); |
| existing_args.append("enable_hw_video_decode=1"); |
| } |
| cmd_line->AppendSwitchASCII(switches::kPpapiFlashArgs, existing_args); |
| } |
| |
| std::string locale = GetContentClient()->browser()->GetApplicationLocale(); |
| if (!locale.empty()) { |
| // Pass on the locale so the plugin will know what language we're using. |
| cmd_line->AppendSwitchASCII(switches::kLang, locale); |
| } |
| |
| if (!plugin_launcher.empty()) |
| cmd_line->PrependWrapper(plugin_launcher); |
| |
| // On posix, never use the zygote for the broker. Also, only use the zygote if |
| // the plugin is sandboxed, and we are not using a plugin launcher - having a |
| // plugin launcher means we need to use another process instead of just |
| // forking the zygote. |
| #if defined(OS_POSIX) |
| if (!info.is_sandboxed) |
| cmd_line->AppendSwitchASCII(switches::kNoSandbox, std::string()); |
| #endif // OS_POSIX |
| process_->Launch( |
| new PpapiPluginSandboxedProcessLauncherDelegate(is_broker_, |
| info, |
| process_->GetHost()), |
| cmd_line); |
| return true; |
| } |
| |
| void PpapiPluginProcessHost::RequestPluginChannel(Client* client) { |
| base::ProcessHandle process_handle; |
| int renderer_child_id; |
| client->GetPpapiChannelInfo(&process_handle, &renderer_child_id); |
| |
| base::ProcessId process_id = (process_handle == base::kNullProcessHandle) ? |
| 0 : base::GetProcId(process_handle); |
| |
| // We can't send any sync messages from the browser because it might lead to |
| // a hang. See the similar code in PluginProcessHost for more description. |
| PpapiMsg_CreateChannel* msg = new PpapiMsg_CreateChannel( |
| process_id, renderer_child_id, client->OffTheRecord()); |
| msg->set_unblock(true); |
| if (Send(msg)) { |
| sent_requests_.push(client); |
| } else { |
| client->OnPpapiChannelOpened(IPC::ChannelHandle(), base::kNullProcessId, 0); |
| } |
| } |
| |
| void PpapiPluginProcessHost::OnProcessLaunched() { |
| VLOG(2) << "ppapi plugin process launched."; |
| host_impl_->set_plugin_process_handle(process_->GetHandle()); |
| } |
| |
| void PpapiPluginProcessHost::OnProcessCrashed(int exit_code) { |
| VLOG(1) << "ppapi plugin process crashed."; |
| PluginServiceImpl::GetInstance()->RegisterPluginCrash(plugin_path_); |
| } |
| |
| bool PpapiPluginProcessHost::OnMessageReceived(const IPC::Message& msg) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(PpapiPluginProcessHost, msg) |
| IPC_MESSAGE_HANDLER(PpapiHostMsg_ChannelCreated, |
| OnRendererPluginChannelCreated) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| DCHECK(handled); |
| return handled; |
| } |
| |
| // Called when the browser <--> plugin channel has been established. |
| void PpapiPluginProcessHost::OnChannelConnected(int32 peer_pid) { |
| // This will actually load the plugin. Errors will actually not be reported |
| // back at this point. Instead, the plugin will fail to establish the |
| // connections when we request them on behalf of the renderer(s). |
| Send(new PpapiMsg_LoadPlugin(plugin_path_, permissions_)); |
| |
| // Process all pending channel requests from the renderers. |
| for (size_t i = 0; i < pending_requests_.size(); i++) |
| RequestPluginChannel(pending_requests_[i]); |
| pending_requests_.clear(); |
| } |
| |
| // Called when the browser <--> plugin channel has an error. This normally |
| // means the plugin has crashed. |
| void PpapiPluginProcessHost::OnChannelError() { |
| VLOG(1) << "PpapiPluginProcessHost" << (is_broker_ ? "[broker]" : "") |
| << "::OnChannelError()"; |
| // We don't need to notify the renderers that were communicating with the |
| // plugin since they have their own channels which will go into the error |
| // state at the same time. Instead, we just need to notify any renderers |
| // that have requested a connection but have not yet received one. |
| CancelRequests(); |
| } |
| |
| void PpapiPluginProcessHost::CancelRequests() { |
| DVLOG(1) << "PpapiPluginProcessHost" << (is_broker_ ? "[broker]" : "") |
| << "CancelRequests()"; |
| for (size_t i = 0; i < pending_requests_.size(); i++) { |
| pending_requests_[i]->OnPpapiChannelOpened(IPC::ChannelHandle(), |
| base::kNullProcessId, 0); |
| } |
| pending_requests_.clear(); |
| |
| while (!sent_requests_.empty()) { |
| sent_requests_.front()->OnPpapiChannelOpened(IPC::ChannelHandle(), |
| base::kNullProcessId, 0); |
| sent_requests_.pop(); |
| } |
| } |
| |
| // Called when a new plugin <--> renderer channel has been created. |
| void PpapiPluginProcessHost::OnRendererPluginChannelCreated( |
| const IPC::ChannelHandle& channel_handle) { |
| if (sent_requests_.empty()) |
| return; |
| |
| // All requests should be processed FIFO, so the next item in the |
| // sent_requests_ queue should be the one that the plugin just created. |
| Client* client = sent_requests_.front(); |
| sent_requests_.pop(); |
| |
| const ChildProcessData& data = process_->GetData(); |
| client->OnPpapiChannelOpened(channel_handle, base::GetProcId(data.handle), |
| data.id); |
| } |
| |
| } // namespace content |