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diff --git a/Plugins/jingle/libjingle/talk/p2p/base/transportchannelimpl.h b/Plugins/jingle/libjingle/talk/p2p/base/transportchannelimpl.h
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+/*
+ * 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 _CRICKET_P2P_BASE_TRANSPORTCHANNELIMPL_H_
+#define _CRICKET_P2P_BASE_TRANSPORTCHANNELIMPL_H_
+
+#include <string>
+#include "talk/p2p/base/transportchannel.h"
+
+namespace buzz { class XmlElement; }
+
+namespace cricket {
+
+class Transport;
+
+// Base class for real implementations of TransportChannel.  This includes some
+// methods called only by Transport, which do not need to be exposed to the
+// client.
+class TransportChannelImpl: public TransportChannel {
+ public:
+  TransportChannelImpl(const std::string& name, const std::string& session_type)
+    : TransportChannel(name, session_type) {}
+
+  // Returns the transport that created this channel.
+  virtual Transport* GetTransport() = 0;
+
+  // Begins the process of attempting to make a connection to the other client.
+  virtual void Connect() = 0;
+
+  // Resets this channel back to the initial state (i.e., not connecting).
+  virtual void Reset() = 0;
+
+  // Allows an individual channel to request signaling and be notified when it
+  // is ready.  This is useful if the individual named channels have need to
+  // send their own transport-info stanzas.
+  sigslot::signal0<> SignalRequestSignaling;
+  virtual void OnSignalingReady() = 0;
+
+  // Handles sending and receiving of stanzas related to this particular
+  // channel.  Any channel may send whatever messages it wants.  The Transport
+  // receives all incoming messages and may forward them to the relevant
+  // channel.  The transport will delete signaled messages.
+  //
+  // Note: Since these messages are delivered asynchronously to the channel,
+  // they cannot return an error if the message is invalid.  It is assumed that
+  // the Transport will have checked validity before forwarding.
+  virtual void OnChannelMessage(const buzz::XmlElement* msg) = 0;
+  sigslot::signal2<TransportChannelImpl*,
+                   buzz::XmlElement*> SignalChannelMessage;
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(TransportChannelImpl);
+};
+
+}  // namespace cricket
+
+#endif  // _CRICKET_P2P_BASE_TRANSPORTCHANNELIMPL_H_