28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
141 lines
5.4 KiB
C++
141 lines
5.4 KiB
C++
/*
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* libjingle
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* Copyright 2004--2006, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_
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#define TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_
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#include "talk/base/criticalsection.h"
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#include "talk/base/messagequeue.h"
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#include "talk/base/stream.h"
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#include "talk/p2p/base/pseudotcp.h"
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#include "talk/p2p/base/session.h"
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namespace talk_base {
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class Thread;
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}
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namespace cricket {
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class Candidate;
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class TransportChannel;
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///////////////////////////////////////////////////////////////////////////////
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// PseudoTcpChannel
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// Note: The PseudoTcpChannel must persist until both of:
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// 1) The StreamInterface provided via GetStream has been closed.
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// This is tracked via non-null stream_.
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// 2) The PseudoTcp session has completed.
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// This is tracked via non-null worker_thread_. When PseudoTcp is done,
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// the TransportChannel is signalled to tear-down. Once the channel is
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// torn down, the worker thread is purged.
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// These indicators are checked by CheckDestroy, invoked whenever one of them
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// changes.
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///////////////////////////////////////////////////////////////////////////////
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// PseudoTcpChannel::GetStream
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// Note: The stream pointer returned by GetStream is owned by the caller.
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// They can close & immediately delete the stream while PseudoTcpChannel still
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// has cleanup work to do. They can also close the stream but not delete it
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// until long after PseudoTcpChannel has finished. We must cope with both.
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///////////////////////////////////////////////////////////////////////////////
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class PseudoTcpChannel
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: public IPseudoTcpNotify,
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public talk_base::MessageHandler,
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public sigslot::has_slots<> {
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public:
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// Signal thread methods
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PseudoTcpChannel(talk_base::Thread* stream_thread,
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Session* session);
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bool Connect(const std::string& content_name,
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const std::string& channel_name,
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int component);
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talk_base::StreamInterface* GetStream();
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sigslot::signal1<PseudoTcpChannel*> SignalChannelClosed;
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// Call this when the Session used to create this channel is being torn
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// down, to ensure that things get cleaned up properly.
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void OnSessionTerminate(Session* session);
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// See the PseudoTcp class for available options.
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void GetOption(PseudoTcp::Option opt, int* value);
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void SetOption(PseudoTcp::Option opt, int value);
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private:
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class InternalStream;
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friend class InternalStream;
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virtual ~PseudoTcpChannel();
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// Stream thread methods
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talk_base::StreamState GetState() const;
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talk_base::StreamResult Read(void* buffer, size_t buffer_len,
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size_t* read, int* error);
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talk_base::StreamResult Write(const void* data, size_t data_len,
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size_t* written, int* error);
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void Close();
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// Multi-thread methods
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void OnMessage(talk_base::Message* pmsg);
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void AdjustClock(bool clear = true);
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void CheckDestroy();
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// Signal thread methods
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void OnChannelDestroyed(TransportChannel* channel);
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// Worker thread methods
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void OnChannelWritableState(TransportChannel* channel);
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void OnChannelRead(TransportChannel* channel, const char* data, size_t size,
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int flags);
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void OnChannelConnectionChanged(TransportChannel* channel,
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const Candidate& candidate);
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virtual void OnTcpOpen(PseudoTcp* ptcp);
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virtual void OnTcpReadable(PseudoTcp* ptcp);
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virtual void OnTcpWriteable(PseudoTcp* ptcp);
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virtual void OnTcpClosed(PseudoTcp* ptcp, uint32 nError);
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virtual IPseudoTcpNotify::WriteResult TcpWritePacket(PseudoTcp* tcp,
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const char* buffer,
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size_t len);
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talk_base::Thread* signal_thread_, * worker_thread_, * stream_thread_;
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Session* session_;
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TransportChannel* channel_;
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std::string content_name_;
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std::string channel_name_;
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PseudoTcp* tcp_;
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InternalStream* stream_;
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bool stream_readable_, pending_read_event_;
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bool ready_to_connect_;
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mutable talk_base::CriticalSection cs_;
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};
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} // namespace cricket
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#endif // TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_
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