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 class SeqWindowElement {
  45 public:
  46   SeqWindowElement();
  47   ~SeqWindowElement();
  48
  49   void init(window_size_t w, seq_nr_t m);
  50
  51   seq_nr_t max_;
  52   window_size_t pos_;
  53   u_int8_t* window_;
  54 };
  55
  56 class SeqWindow
  57 {
  58 public:
  59   typedef std::map<sender_id_t, SeqWindowElement> SenderMap;
  60
  61   SeqWindow(window_size_t w);
  62   ~SeqWindow();
  63
  64   bool checkAndAdd(sender_id_t sender, seq_nr_t seq_nr);
  65   void clear(sender_id_t sender);
  66   void clear();
  67
  68 private:
  69   window_size_t window_size_;
  70   Mutex mutex_;
  71   SenderMap sender_;
  72
  73   SeqWindow(const SeqWindow &s);
  74   void operator=(const SeqWindow &s);
  75
  76         friend class boost::serialization::access;
  77         template<class Archive>
  78         void serialize(Archive & ar, const unsigned int version)
  79         {
  80                 Lock lock(mutex_);
  81                 //unsigned int serial = (unsigned int) window_size_;
  82                 //window_size_t serial = (window_size_t) window_size_;
  83         ar & window_size_;
  84         //TODO: Do not sync complete Sender Map!
  85         // ar & sender_;
  86   }
  87
  88
  89 };
  90
  91 #endif