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diff --git a/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/p2psocket.h b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/p2psocket.h
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+++ b/kopete/protocols/jabber/jingle/libjingle/talk/p2p/base/p2psocket.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.
+ */
+
+// P2PSocket wraps up the state management of the connection between two
+// P2P clients.  Clients have candidate ports for connecting, and connections
+// which are combinations of candidates from each end (Alice and Bob each
+// have candidates, one candidate from Alice and one candidate from Bob are
+// used to make a connection, repeat to make many connections).
+//
+// When all of the available connections become invalid (non-writable), we
+// kick off a process of determining more candidates and more connections.
+//
+#ifndef _CRICKET_P2P_BASE_P2PSOCKET_H_
+#define _CRICKET_P2P_BASE_P2PSOCKET_H_
+
+#include <vector>
+#include <string>
+#include "talk/base/sigslot.h"
+#include "talk/p2p/base/candidate.h"
+#include "talk/p2p/base/port.h"
+#include "talk/p2p/base/portallocator.h"
+
+namespace cricket {
+
+// Adds the port on which the candidate originated.
+class RemoteCandidate: public Candidate {
+ public:
+  RemoteCandidate(const Candidate& c, Port* origin_port)
+    : Candidate(c), origin_port_(origin_port) {}
+
+  Port* origin_port() { return origin_port_; }
+
+ private:
+  Port* origin_port_;
+};
+
+// P2PSocket manages the candidates and connection process to keep two P2P
+// clients connected to each other.
+class P2PSocket : public MessageHandler, public sigslot::has_slots<> {
+ public:
+  enum State {
+    STATE_CONNECTING = 0,    // establishing writability
+    STATE_WRITABLE,          // connected - ready for writing
+  };
+
+  P2PSocket(const std::string &name, PortAllocator *allocator);
+  virtual ~P2PSocket();
+
+  // Typically SocketManager calls these
+
+  const std::string &name() const;
+  void StartProcessingCandidates();
+  void AddRemoteCandidates(const std::vector<Candidate> &remote_candidates);
+  void OnSignalingReady();
+  void Reset();
+
+  // Typically the Session Client calls these
+
+  int Send(const char *data, size_t len);
+  int SetOption(Socket::Option opt, int value);
+  int GetError();
+
+  State state();
+  bool writable();
+  const std::vector<Connection *>& connections();
+  Connection* best_connection() { return best_connection_; }
+  Thread *thread();
+
+  sigslot::signal2<P2PSocket *, State> SignalState;
+  sigslot::signal0<> SignalRequestSignaling;
+  sigslot::signal3<P2PSocket *, const char *, size_t> SignalReadPacket;
+  sigslot::signal2<P2PSocket *, const SocketAddress &> SignalConnectionChanged;
+  sigslot::signal2<P2PSocket *, const std::vector<Candidate>&> 
+      SignalCandidatesReady;
+  sigslot::signal1<P2PSocket *> SignalConnectionMonitor;
+
+  // Handler for internal messages.
+  virtual void OnMessage(Message *pmsg);
+
+ private:
+  void set_state(State state);
+  void UpdateConnectionStates();
+  void RequestSort();
+  void SortConnections();
+  void SwitchBestConnectionTo(Connection* conn);
+  void HandleWritable();
+  void HandleNotWritable();
+  void HandleAllTimedOut();
+  Connection* GetBestConnectionOnNetwork(Network* network);
+  bool CreateConnections(const Candidate &remote_candidate, Port* origin_port, 
+                         bool readable);
+  bool CreateConnection(Port* port, const Candidate& remote_candidate, 
+                        Port* origin_port, bool readable);
+  void RememberRemoteCandidate(const Candidate& remote_candidate, 
+                               Port* origin_port);
+  void OnUnknownAddress(Port *port, const SocketAddress &addr, 
+                        StunMessage *stun_msg, 
+                        const std::string &remote_username);
+  void OnPortReady(PortAllocatorSession *session, Port* port);
+  void OnCandidatesReady(PortAllocatorSession *session, 
+                         const std::vector<Candidate>& candidates);
+  void OnConnectionStateChange(Connection *connection);
+  void OnConnectionDestroyed(Connection *connection);
+  void OnPortDestroyed(Port* port);
+  void OnAllocate();
+  void OnReadPacket(Connection *connection, const char *data, size_t len);
+  void OnSort();
+  void OnPing();
+  bool IsPingable(Connection* conn);
+  Connection* FindNextPingableConnection();
+  uint32 NumPingableConnections();
+  PortAllocatorSession* allocator_session() {
+    return allocator_sessions_.back();
+  }
+  void AddAllocatorSession(PortAllocatorSession* session);
+
+  Thread *worker_thread_;
+  State state_;
+  bool waiting_for_signaling_;
+  int error_;
+  std::string name_;
+  PortAllocator *allocator_;
+  std::vector<PortAllocatorSession*> allocator_sessions_;
+  std::vector<Port *> ports_;
+  std::vector<Connection *> connections_;
+  Connection *best_connection_;
+  std::vector<RemoteCandidate> remote_candidates_;
+  bool pinging_started_;  // indicates whether StartGetAllCandidates has been called
+  bool sort_dirty_; // indicates whether another sort is needed right now
+  bool was_writable_;
+  bool was_timed_out_;
+  typedef std::map<Socket::Option, int> OptionMap;
+  OptionMap options_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(P2PSocket);
+};
+
+} // namespace cricket
+
+#endif // _CRICKET_P2P_BASE_P2PSOCKET_H_