src/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) 2007-2008 Othmar Gsenger, Erwin Nindl,
  15  *                          Christian Pointner <satp@wirdorange.org>
  16  *
  17  *  This file is part of Anytun.
  18  *
  19  *  Anytun is free software: you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License version 3 as
  21  *  published by the Free Software Foundation.
  22  *
  23  *  Anytun is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 #ifndef _SEQ_WINDOW_H_
  33 #define _SEQ_WINDOW_H_
  34
  35 #include <map>
  36 #include <deque>
  37 #include <boost/archive/text_oarchive.hpp>
  38 #include <boost/archive/text_iarchive.hpp>
  39 #include "threadUtils.hpp"
  40 #include "datatypes.h"
  41
  42 class SeqWindow
  43 {
  44 public:
  45   typedef std::deque<seq_nr_t> SeqDeque;
  46   typedef std::map<sender_id_t, SeqDeque> SenderMap;
  47
  48   SeqWindow(window_size_t w);
  49   ~SeqWindow();
  50
  51   SeqDeque::size_type getLength(sender_id_t sender);
  52   bool hasSeqNr(sender_id_t sender, seq_nr_t seq);
  53   void addSeqNr(sender_id_t sender, seq_nr_t seq);
  54   void clear(sender_id_t sender);
  55   void clear();
  56
  57
  58 private:
  59   window_size_t window_size_;
  60   Mutex mutex_;
  61   SenderMap sender_;
  62
  63   SeqWindow(const SeqWindow &s);
  64   void operator=(const SeqWindow &s);
  65
  66         friend class boost::serialization::access;
  67         template<class Archive>
  68         void serialize(Archive & ar, const unsigned int version)
  69         {
  70                 Lock lock(mutex_);
  71                 //unsigned int serial = (unsigned int) window_size_;
  72                 //window_size_t serial = (window_size_t) window_size_;
  73         ar & window_size_;
  74         //TODO: Do not sync complete Sender Map!
  75         // ar & sender_;
  76   }
  77
  78
  79 };
  80
  81 #endif