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diff --git a/talk/session/tunnel/pseudotcpchannel.h b/talk/session/tunnel/pseudotcpchannel.h
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+/*
+ * libjingle
+ * Copyright 2004--2006, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. 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.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifndef TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_
+#define TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_
+
+#include "webrtc/p2p/base/pseudotcp.h"
+#include "webrtc/p2p/base/session.h"
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/base/messagequeue.h"
+#include "webrtc/base/stream.h"
+
+namespace rtc {
+class Thread;
+}
+
+namespace cricket {
+
+class Candidate;
+class TransportChannel;
+
+///////////////////////////////////////////////////////////////////////////////
+// PseudoTcpChannel
+// Note: The PseudoTcpChannel must persist until both of:
+// 1) The StreamInterface provided via GetStream has been closed.
+//    This is tracked via non-null stream_.
+// 2) The PseudoTcp session has completed.
+//    This is tracked via non-null worker_thread_.  When PseudoTcp is done,
+//    the TransportChannel is signalled to tear-down.  Once the channel is
+//    torn down, the worker thread is purged.
+// These indicators are checked by CheckDestroy, invoked whenever one of them
+// changes.
+///////////////////////////////////////////////////////////////////////////////
+// PseudoTcpChannel::GetStream
+// Note: The stream pointer returned by GetStream is owned by the caller.
+// They can close & immediately delete the stream while PseudoTcpChannel still
+// has cleanup work to do.  They can also close the stream but not delete it
+// until long after PseudoTcpChannel has finished.  We must cope with both.
+///////////////////////////////////////////////////////////////////////////////
+
+class PseudoTcpChannel
+    : public IPseudoTcpNotify,
+      public rtc::MessageHandler,
+      public sigslot::has_slots<> {
+ public:
+  // Signal thread methods
+  PseudoTcpChannel(rtc::Thread* stream_thread,
+                   Session* session);
+
+  bool Connect(const std::string& content_name,
+               const std::string& channel_name,
+               int component);
+  rtc::StreamInterface* GetStream();
+
+  sigslot::signal1<PseudoTcpChannel*> SignalChannelClosed;
+
+  // Call this when the Session used to create this channel is being torn
+  // down, to ensure that things get cleaned up properly.
+  void OnSessionTerminate(Session* session);
+
+  // See the PseudoTcp class for available options.
+  void GetOption(PseudoTcp::Option opt, int* value);
+  void SetOption(PseudoTcp::Option opt, int value);
+
+ private:
+  class InternalStream;
+  friend class InternalStream;
+
+  virtual ~PseudoTcpChannel();
+
+  // Stream thread methods
+  rtc::StreamState GetState() const;
+  rtc::StreamResult Read(void* buffer, size_t buffer_len,
+                               size_t* read, int* error);
+  rtc::StreamResult Write(const void* data, size_t data_len,
+                                size_t* written, int* error);
+  void Close();
+
+  // Multi-thread methods
+  void OnMessage(rtc::Message* pmsg);
+  void AdjustClock(bool clear = true);
+  void CheckDestroy();
+
+  // Signal thread methods
+  void OnChannelDestroyed(TransportChannel* channel);
+
+  // Worker thread methods
+  void OnChannelWritableState(TransportChannel* channel);
+  void OnChannelRead(TransportChannel* channel, const char* data, size_t size,
+                     const rtc::PacketTime& packet_time, int flags);
+  void OnChannelConnectionChanged(TransportChannel* channel,
+                                  const Candidate& candidate);
+
+  virtual void OnTcpOpen(PseudoTcp* ptcp);
+  virtual void OnTcpReadable(PseudoTcp* ptcp);
+  virtual void OnTcpWriteable(PseudoTcp* ptcp);
+  virtual void OnTcpClosed(PseudoTcp* ptcp, uint32 nError);
+  virtual IPseudoTcpNotify::WriteResult TcpWritePacket(PseudoTcp* tcp,
+                                                       const char* buffer,
+                                                       size_t len);
+
+  rtc::Thread* signal_thread_, * worker_thread_, * stream_thread_;
+  Session* session_;
+  TransportChannel* channel_;
+  std::string content_name_;
+  std::string channel_name_;
+  PseudoTcp* tcp_;
+  InternalStream* stream_;
+  bool stream_readable_, pending_read_event_;
+  bool ready_to_connect_;
+  mutable rtc::CriticalSection cs_;
+};
+
+}  // namespace cricket
+
+#endif  // TALK_SESSION_TUNNEL_PSEUDOTCPCHANNEL_H_