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diff --git a/Plugins/jingle/libjingle/talk/p2p/base/pseudotcp.h b/Plugins/jingle/libjingle/talk/p2p/base/pseudotcp.h
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+++ b/Plugins/jingle/libjingle/talk/p2p/base/pseudotcp.h
@@ -0,0 +1,182 @@
+/*
+ * libjingle
+ * Copyright 2004--2005, 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 __PSEUDOTCP_H__
+#define __PSEUDOTCP_H__
+
+#include <list>
+#include "talk/base/basictypes.h"
+
+namespace cricket {
+
+//////////////////////////////////////////////////////////////////////
+// IPseudoTcpNotify
+//////////////////////////////////////////////////////////////////////
+
+class PseudoTcp;
+
+class IPseudoTcpNotify {
+public:
+  // Notification of tcp events
+  virtual void OnTcpOpen(PseudoTcp * tcp) = 0;
+  virtual void OnTcpReadable(PseudoTcp * tcp) = 0;
+  virtual void OnTcpWriteable(PseudoTcp * tcp) = 0;
+  virtual void OnTcpClosed(PseudoTcp * tcp, uint32 nError) = 0;
+
+  // Write the packet onto the network
+  enum WriteResult { WR_SUCCESS, WR_TOO_LARGE, WR_FAIL };
+  virtual WriteResult TcpWritePacket(PseudoTcp * tcp, const char * buffer, size_t len) = 0;
+};
+
+//////////////////////////////////////////////////////////////////////
+// PseudoTcp
+//////////////////////////////////////////////////////////////////////
+
+class PseudoTcp {
+public:
+  static uint32 Now();
+
+  PseudoTcp(IPseudoTcpNotify * notify, uint32 conv);
+  virtual ~PseudoTcp();
+
+  int Connect();
+  int Recv(char * buffer, size_t len);
+  int Send(const char * buffer, size_t len);
+  void Close(bool force);
+  int GetError();
+
+  enum TcpState { TCP_LISTEN, TCP_SYN_SENT, TCP_SYN_RECEIVED, TCP_ESTABLISHED, TCP_CLOSED };
+  TcpState State() const { return m_state; }
+
+  // Call this when the PMTU changes.
+  void NotifyMTU(uint16 mtu);
+
+  // Call this based on timeout value returned from GetNextClock.
+  // It's ok to call this too frequently.
+  void NotifyClock(uint32 now);
+
+  // Call this whenever a packet arrives.
+  // Returns true if the packet was processed successfully.
+  bool NotifyPacket(const char * buffer, size_t len);
+
+  // Call this to determine the next time NotifyClock should be called.
+  // Returns false if the socket is ready to be destroyed.
+  bool GetNextClock(uint32 now, long& timeout);
+
+protected:
+  enum SendFlags { sfNone, sfDelayedAck, sfImmediateAck };
+  enum {
+    // Note: can't go as high as 1024 * 64, because of uint16 precision
+    kRcvBufSize = 1024 * 60,
+    // Note: send buffer should be larger to make sure we can always fill the
+    // receiver window
+    kSndBufSize = 1024 * 90
+  }; 
+
+  struct Segment {
+    uint32 conv, seq, ack;
+    uint8 flags;
+    uint16 wnd;
+    const char * data;
+    uint32 len;
+    uint32 tsval, tsecr;
+  };
+
+  struct SSegment {
+    uint32 seq, len;
+    //uint32 tstamp;
+    uint8 xmit;
+    bool bCtrl;
+
+    SSegment(uint32 s, uint32 l, bool c) : seq(s), len(l), /*tstamp(0),*/ xmit(0), bCtrl(c) { }
+  };
+  typedef std::list<SSegment> SList;
+
+  struct RSegment {
+    uint32 seq, len;
+  };
+
+  uint32 queue(const char * data, uint32 len, bool bCtrl);
+
+  IPseudoTcpNotify::WriteResult packet(uint32 seq, uint8 flags, const char * data, uint32 len);
+  bool parse(const uint8 * buffer, uint32 size);
+
+  void attemptSend(SendFlags sflags = sfNone);
+
+  void closedown(uint32 err = 0);
+
+  bool clock_check(uint32 now, long& nTimeout);
+
+  bool process(Segment& seg);
+  bool transmit(const SList::iterator& seg, uint32 now);
+
+  void adjustMTU();
+
+private:
+  IPseudoTcpNotify * m_notify;
+  enum Shutdown { SD_NONE, SD_GRACEFUL, SD_FORCEFUL } m_shutdown;
+  int m_error;
+
+  // TCB data
+  TcpState m_state;
+  uint32 m_conv;
+  bool m_bReadEnable, m_bWriteEnable, m_bOutgoing;
+  uint32 m_lasttraffic;
+
+  // Incoming data
+  typedef std::list<RSegment> RList;
+  RList m_rlist;
+  char m_rbuf[kRcvBufSize];
+  uint32 m_rcv_nxt, m_rcv_wnd, m_rlen, m_lastrecv;
+
+  // Outgoing data
+  SList m_slist;
+  char m_sbuf[kSndBufSize];
+  uint32 m_snd_nxt, m_snd_wnd, m_slen, m_lastsend, m_snd_una;
+  // Maximum segment size, estimated protocol level, largest segment sent
+  uint32 m_mss, m_msslevel, m_largest, m_mtu_advise;
+  // Retransmit timer
+  uint32 m_rto_base;
+
+  // Timestamp tracking
+  uint32 m_ts_recent, m_ts_lastack;
+
+  // Round-trip calculation
+  uint32 m_rx_rttvar, m_rx_srtt, m_rx_rto;
+
+  // Congestion avoidance, Fast retransmit/recovery, Delayed ACKs
+  uint32 m_ssthresh, m_cwnd;
+  uint8 m_dup_acks;
+  uint32 m_recover;
+  uint32 m_t_ack;
+};
+
+//////////////////////////////////////////////////////////////////////
+
+} // namespace cricket
+
+#endif // __PSEUDOTCP_H__