1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ppapi/proxy/plugin_message_filter.h" 6 7 #include "ppapi/proxy/ppapi_messages.h" 8 9 namespace ppapi { 10 namespace proxy { 11 12 PluginMessageFilter::PluginMessageFilter( 13 std::set<PP_Instance>* seen_instance_ids) 14 : seen_instance_ids_(seen_instance_ids), 15 channel_(NULL) { 16 } 17 18 PluginMessageFilter::~PluginMessageFilter() { 19 } 20 21 void PluginMessageFilter::OnFilterAdded(IPC::Channel* channel) { 22 channel_ = channel; 23 } 24 25 void PluginMessageFilter::OnFilterRemoved() { 26 channel_ = NULL; 27 } 28 29 bool PluginMessageFilter::OnMessageReceived(const IPC::Message& message) { 30 bool handled = true; 31 IPC_BEGIN_MESSAGE_MAP(PluginMessageFilter, message) 32 IPC_MESSAGE_HANDLER(PpapiMsg_ReserveInstanceId, OnMsgReserveInstanceId) 33 IPC_MESSAGE_UNHANDLED(handled = false) 34 IPC_END_MESSAGE_MAP() 35 return handled; 36 } 37 38 bool PluginMessageFilter::Send(IPC::Message* msg) { 39 if (channel_) 40 return channel_->Send(msg); 41 delete msg; 42 return false; 43 } 44 45 void PluginMessageFilter::OnMsgReserveInstanceId(PP_Instance instance, 46 bool* usable) { 47 // See the message definition for how this works. 48 if (seen_instance_ids_->find(instance) != seen_instance_ids_->end()) { 49 // Instance ID already seen, reject it. 50 *usable = false; 51 return; 52 } 53 54 // This instance ID is new so we can return that it's usable and mark it as 55 // used for future reference. 56 seen_instance_ids_->insert(instance); 57 *usable = true; 58 } 59 60 } // namespace proxy 61 } // namespace ppapi 62
