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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/renderer/plugin_channel_host.h"
#include "chrome/common/plugin_messages.h"
// A simple MessageFilter that will ignore all messages and respond to sync
// messages with an error when is_listening_ is false.
class IsListeningFilter : public IPC::ChannelProxy::MessageFilter {
public:
IsListeningFilter() {}
// MessageFilter overrides
virtual void OnFilterRemoved() {}
virtual void OnFilterAdded(IPC::Channel* channel) { channel_ = channel; }
virtual bool OnMessageReceived(const IPC::Message& message);
static bool is_listening_;
private:
IPC::Channel* channel_;
DISALLOW_EVIL_CONSTRUCTORS(IsListeningFilter);
};
bool IsListeningFilter::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
if (!IsListeningFilter::is_listening_) {
// reply to synchronous messages with an error (so they don't block while
// we're not listening)
if (message.is_sync()) {
IPC::Message* reply = IPC::SyncMessage::GenerateReply(&message);
reply->set_reply_error();
channel_->Send(reply);
}
handled = true;
} else {
handled = false;
}
return handled;
}
// static
bool IsListeningFilter::is_listening_ = true;
// static
void PluginChannelHost::SetListening(bool flag) {
IsListeningFilter::is_listening_ = flag;
}
PluginChannelHost* PluginChannelHost::GetPluginChannelHost(
const std::wstring& channel_name, MessageLoop* ipc_message_loop) {
PluginChannelHost* result =
static_cast<PluginChannelHost*>(PluginChannelBase::GetChannel(
channel_name,
IPC::Channel::MODE_CLIENT,
ClassFactory,
ipc_message_loop,
true));
return result;
}
PluginChannelHost::PluginChannelHost() {
}
PluginChannelHost::~PluginChannelHost() {
}
bool PluginChannelHost::Init(MessageLoop* ipc_message_loop,
bool create_pipe_now) {
bool ret = PluginChannelBase::Init(ipc_message_loop, create_pipe_now);
is_listening_filter_ = new IsListeningFilter;
channel_->AddFilter(is_listening_filter_);
return ret;
}
int PluginChannelHost::GenerateRouteID() {
int route_id = MSG_ROUTING_NONE;
Send(new PluginMsg_GenerateRouteID(&route_id));
return route_id;
}
void PluginChannelHost::AddRoute(int route_id,
IPC::Channel::Listener* listener,
bool npobject) {
PluginChannelBase::AddRoute(route_id, listener, npobject);
if (!npobject)
proxies_[route_id] = listener;
}
void PluginChannelHost::RemoveRoute(int route_id) {
proxies_.erase(route_id);
PluginChannelBase::RemoveRoute(route_id);
}
void PluginChannelHost::OnChannelError() {
PluginChannelBase::OnChannelError();
for (ProxyMap::iterator iter = proxies_.begin();
iter != proxies_.end(); iter++) {
iter->second->OnChannelError();
}
proxies_.clear();
}
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