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 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 #include <boost/archive/text_oarchive.hpp>
  37 #include <boost/archive/text_iarchive.hpp>
  38 #include "threadUtils.hpp"
  39 #include "datatypes.h"
  40
  41 class SeqWindow
  42 {
  43 public:
  44   typedef std::deque<seq_nr_t> SeqDeque;
  45   typedef std::map<sender_id_t, SeqDeque> SenderMap;
  46
  47   SeqWindow(window_size_t w);
  48   ~SeqWindow();
  49
  50   SeqDeque::size_type getLength(sender_id_t sender);
  51   bool hasSeqNr(sender_id_t sender, seq_nr_t seq);
  52   void addSeqNr(sender_id_t sender, seq_nr_t seq);
  53   void clear(sender_id_t sender);
  54   void clear();
  55
  56
  57 private:
  58   window_size_t window_size_;
  59   Mutex mutex_;
  60   SenderMap sender_;
  61
  62   SeqWindow(const SeqWindow &s);
  63   void operator=(const SeqWindow &s);
  64
  65         friend class boost::serialization::access;
  66         template<class Archive>
  67         void serialize(Archive & ar, const unsigned int version)
  68         {
  69                 Lock lock(mutex_);
  70                 //unsigned int serial = (unsigned int) window_size_;
  71                 //window_size_t serial = (window_size_t) window_size_;
  72         ar & window_size_;
  73         //TODO: Do not sync complete Sender Map!
  74         // ar & sender_;
  75   }
  76
  77
  78 };
  79
  80 #endif