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diff --git a/src/HandshakeExtensionMessage.h b/src/HandshakeExtensionMessage.h
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+++ b/src/HandshakeExtensionMessage.h
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+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef _D_HANDSHAKE_EXTENSION_MESSAGE_H_
+#define _D_HANDSHAKE_EXTENSION_MESSAGE_H_
+
+#include "ExtensionMessage.h"
+#include "BtConstants.h"
+
+class BtContext;
+typedef SharedHandle<BtContext> BtContextHandle;
+class Peer;
+typedef SharedHandle<Peer> PeerHandle;
+class HandshakeExtensionMessage;
+typedef SharedHandle<HandshakeExtensionMessage> HandshakeExtensionMessageHandle;
+class Logger;
+
+class HandshakeExtensionMessage:public ExtensionMessage {
+private:
+  string _clientVersion;
+
+  uint16_t _tcpPort;
+
+  map<string, uint8_t> _extensions;
+
+  BtContextHandle _btContext;
+
+  PeerHandle _peer;
+
+  const Logger* _logger;
+
+public:
+  HandshakeExtensionMessage();
+
+  virtual ~HandshakeExtensionMessage();
+
+  virtual string getBencodedData();
+
+  virtual uint8_t getExtensionMessageID()
+  {
+    return 0;
+  }
+  
+  virtual const string& getExtensionName() const
+  {
+    return EXTENSION_NAME;
+  }
+
+  static const string EXTENSION_NAME;
+
+  virtual string toString() const;
+
+  virtual void doReceivedAction();
+
+  void setClientVersion(const string& version)
+  {
+    _clientVersion = version;
+  }
+
+  const string& getClientVersion() const
+  {
+    return _clientVersion;
+  }
+
+  void setTCPPort(uint16_t port)
+  {
+    _tcpPort = port;
+  }
+
+  uint16_t getTCPPort() const
+  {
+    return _tcpPort;
+  }
+
+  void setExtension(const string& name, uint8_t id)
+  {
+    _extensions[name] = id;
+  }
+
+  void setExtensions(const Extensions& extensions)
+  {
+    _extensions = extensions;
+  }
+
+  uint8_t getExtensionMessageID(const string& name) const;
+
+  void setPeer(const PeerHandle& peer);
+
+  void setBtContext(const BtContextHandle& btContext);
+
+  static HandshakeExtensionMessageHandle create(const char* data,
+						size_t dataLength);
+
+};
+
+typedef SharedHandle<HandshakeExtensionMessage> HandshakeExtensionMessageHandle;
+#endif // _D_HANDSHAKE_EXTENSION_MESSAGE_H_