anyrtpproxy/portWindow.h

   1 /*
   2  *  anytun
   3  *
   4  *  The secure anycast tunneling protocol (satp) defines a protocol used
   5  *  for communication between any combination of unicast and anycast
   6  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
   7  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
   8  *  ethernet, ip, arp ...). satp directly includes cryptography and
   9  *  message authentication based on the methodes used by SRTP.  It is
  10  *  intended to deliver a generic, scaleable and secure solution for
  11  *  tunneling and relaying of packets of any protocol.
  12  *
  13  *
  14  *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program (see the file COPYING included with this
  27  *  distribution); if not, write to the Free Software Foundation, Inc.,
  28  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  */
  30
  31 #ifndef _PORT_WINDOW_H_
  32 #define _PORT_WINDOW_H_
  33
  34 #include <set>
  35 #include "../threadUtils.hpp"
  36 #include "../datatypes.h"
  37
  38 class PortWindow
  39 {
  40 public:
  41   typedef std::set<u_int16_t> PortSet;
  42
  43   PortWindow(u_int16_t,u_int16_t);
  44   ~PortWindow();
  45
  46   PortSet::size_type getLength();
  47   bool hasPort(u_int16_t);
  48   bool freePort(u_int16_t);
  49   u_int16_t newPort();
  50   void clear();
  51
  52
  53 private:
  54         u_int16_t start_port_;
  55         u_int16_t end_port_;
  56   ::Mutex mutex_;
  57         PortSet ports_;
  58
  59   PortWindow(const PortWindow &s);
  60   void operator=(const PortWindow &s);
  61 };
  62
  63 #endif