seqWindow.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 _SEQ_WINDOW_H_
  32 #define _SEQ_WINDOW_H_
  33
  34 #include <map>
  35 #include <deque>
  36
  37 #include "threadUtils.hpp"
  38 #include "datatypes.h"
  39
  40 class SeqWindow
  41 {
  42 public:
  43   typedef std::deque<seq_nr_t> SeqDeque;
  44   typedef std::map<sender_id_t, SeqDeque> SenderMap;
  45
  46   SeqWindow(window_size_t w);
  47   ~SeqWindow();
  48
  49   SeqDeque::size_type getLength(sender_id_t sender);
  50   bool hasSeqNr(sender_id_t sender, seq_nr_t seq);
  51   void addSeqNr(sender_id_t sender, seq_nr_t seq);
  52   void clear(sender_id_t sender);
  53   void clear();
  54
  55 private:
  56   SeqWindow(const SeqWindow &s);
  57   void operator=(const SeqWindow &s);
  58
  59   window_size_t window_size_;
  60   Mutex mutex_;
  61   SenderMap sender_;
  62 };
  63
  64 #endif