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diff --git a/anyrtpproxy/portWindow.h b/anyrtpproxy/portWindow.h
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+/*
+ * anytun
+ *
+ * The secure anycast tunneling protocol (satp) defines a protocol used
+ * for communication between any combination of unicast and anycast
+ * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
+ * mode and allows tunneling of every ETHER TYPE protocol (e.g.
+ * ethernet, ip, arp ...). satp directly includes cryptography and
+ * message authentication based on the methodes used by SRTP. It is
+ * intended to deliver a generic, scaleable and secure solution for
+ * tunneling and relaying of packets of any protocol.
+ *
+ *
+ * Copyright (C) 2007 anytun.org <satp@wirdorange.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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 (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _PORT_WINDOW_H_
+#define _PORT_WINDOW_H_
+
+#include <set>
+#include "../threadUtils.hpp"
+#include "../datatypes.h"
+
+class PortWindow
+{
+public:
+ typedef std::set<u_int16_t> PortSet;
+
+ PortWindow(u_int16_t,u_int16_t);
+ ~PortWindow();
+
+ PortSet::size_type getLength();
+ bool hasPort(u_int16_t);
+ bool freePort(u_int16_t);
+ u_int16_t newPort();
+ void clear();
+
+
+private:
+ u_int16_t start_port_;
+ u_int16_t end_port_;
+ Mutex mutex_;
+ PortSet ports_;
+
+ PortWindow(const PortWindow &s);
+ void operator=(const PortWindow &s);
+};
+
+#endif