2011-06-03 22:33:56 +04:00
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "base/process_util.h"
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#include "mozilla/ipc/AsyncChannel.h"
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#include "mozilla/ipc/ProtocolUtils.h"
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#include "mozilla/ipc/Transport.h"
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using namespace base;
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2011-06-03 22:33:56 +04:00
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using namespace IPC;
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2011-06-03 22:33:56 +04:00
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namespace mozilla {
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namespace ipc {
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class ChannelOpened : public IPC::Message
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{
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public:
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ChannelOpened(TransportDescriptor aDescriptor,
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ProcessId aOtherProcess,
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ProtocolId aProtocol)
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: IPC::Message(MSG_ROUTING_CONTROL, // these only go to top-level actors
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CHANNEL_OPENED_MESSAGE_TYPE,
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PRIORITY_NORMAL)
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{
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IPC::WriteParam(this, aDescriptor);
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IPC::WriteParam(this, aOtherProcess);
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IPC::WriteParam(this, static_cast<uint32>(aProtocol));
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}
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static bool Read(const IPC::Message& aMsg,
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TransportDescriptor* aDescriptor,
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ProcessId* aOtherProcess,
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ProtocolId* aProtocol)
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{
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void* iter = nsnull;
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if (!IPC::ReadParam(&aMsg, &iter, aDescriptor) ||
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!IPC::ReadParam(&aMsg, &iter, aOtherProcess) ||
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!IPC::ReadParam(&aMsg, &iter, reinterpret_cast<uint32*>(aProtocol))) {
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return false;
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}
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aMsg.EndRead(iter);
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return true;
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}
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};
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bool
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Bridge(const PrivateIPDLInterface&,
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AsyncChannel* aParentChannel, ProcessHandle aParentProcess,
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AsyncChannel* aChildChannel, ProcessHandle aChildProcess,
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ProtocolId aProtocol)
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{
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ProcessId parentId = GetProcId(aParentProcess);
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ProcessId childId = GetProcId(aChildProcess);
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if (!parentId || !childId) {
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return false;
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}
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TransportDescriptor parentSide, childSide;
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if (!CreateTransport(aParentProcess, aChildProcess,
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&parentSide, &childSide)) {
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return false;
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}
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if (!aParentChannel->Send(new ChannelOpened(parentSide,
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childId,
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aProtocol)) ||
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!aChildChannel->Send(new ChannelOpened(childSide,
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parentId,
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aProtocol))) {
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CloseDescriptor(parentSide);
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CloseDescriptor(childSide);
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return false;
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}
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return true;
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}
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2011-06-03 22:33:56 +04:00
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bool
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Open(const PrivateIPDLInterface&,
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AsyncChannel* aOpenerChannel, ProcessHandle aOtherProcess,
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Transport::Mode aOpenerMode,
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ProtocolId aProtocol)
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{
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bool isParent = (Transport::MODE_SERVER == aOpenerMode);
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ProcessHandle thisHandle = GetCurrentProcessHandle();
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ProcessHandle parentHandle = isParent ? thisHandle : aOtherProcess;
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ProcessHandle childHandle = !isParent ? thisHandle : aOtherProcess;
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ProcessId parentId = GetProcId(parentHandle);
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ProcessId childId = GetProcId(childHandle);
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if (!parentId || !childId) {
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return false;
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}
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TransportDescriptor parentSide, childSide;
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if (!CreateTransport(parentHandle, childHandle,
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&parentSide, &childSide)) {
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return false;
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}
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Message* parentMsg = new ChannelOpened(parentSide, childId, aProtocol);
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Message* childMsg = new ChannelOpened(childSide, parentId, aProtocol);
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nsAutoPtr<Message> messageForUs(isParent ? parentMsg : childMsg);
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nsAutoPtr<Message> messageForOtherSide(!isParent ? parentMsg : childMsg);
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if (!aOpenerChannel->Echo(messageForUs.forget()) ||
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!aOpenerChannel->Send(messageForOtherSide.forget())) {
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CloseDescriptor(parentSide);
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CloseDescriptor(childSide);
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return false;
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}
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return true;
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}
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2011-06-03 22:33:56 +04:00
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bool
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UnpackChannelOpened(const PrivateIPDLInterface&,
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2011-06-03 22:33:56 +04:00
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const Message& aMsg,
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2011-06-03 22:33:56 +04:00
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TransportDescriptor* aTransport,
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ProcessId* aOtherProcess,
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ProtocolId* aProtocol)
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{
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return ChannelOpened::Read(aMsg, aTransport, aOtherProcess, aProtocol);
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}
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} // namespace ipc
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} // namespace mozilla
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