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+/***************************************************************************
+ * Copyright (C) 2005 by Joris Guisson *
+ * joris.guisson@gmail.com *
+ * *
+ * 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. *
+ ***************************************************************************/
+#ifndef BTUTPEX_H
+#define BTUTPEX_H
+
+#include <map>
+#include <net/address.h>
+#include <util/constants.h>
+
+namespace bt
+{
+ class Peer;
+ class PeerManager;
+ class BEncoder;
+
+ /**
+ * @author Joris Guisson <joris.guisson@gmail.com>
+ *
+ * Class which handles µTorrent's peer exchange
+ */
+ class UTPex
+ {
+ public:
+ UTPex(Peer* peer,Uint32 id);
+ virtual ~UTPex();
+
+ /**
+ * Handle a PEX packet
+ * @param packet The packet
+ * @param size The size of the packet
+ */
+ void handlePexPacket(const Uint8* packet,Uint32 size);
+
+ /// Do we need to update PEX (should happen every minute)
+ bool needsUpdate() const;
+
+ /// Send a new PEX packet to the Peer
+ void update(PeerManager* pman);
+
+ /// Change the ID used in the extended packets
+ void changeID(Uint32 nid) {id = nid;}
+ private:
+ void encode(BEncoder & enc,const std::map<Uint32,net::Address> & ps);
+
+ private:
+ Peer* peer;
+ Uint32 id;
+ std::map<Uint32,net::Address> peers;
+ TimeStamp last_updated;
+ };
+
+}
+
+#endif