anytun: buffer.h Source File

00001 /*
-00002  *  anytun
-00003  *
-00004  *  The secure anycast tunneling protocol (satp) defines a protocol used
-00005  *  for communication between any combination of unicast and anycast
-00006  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
-00007  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
-00008  *  ethernet, ip, arp ...). satp directly includes cryptography and
-00009  *  message authentication based on the methodes used by SRTP.  It is
-00010  *  intended to deliver a generic, scaleable and secure solution for
-00011  *  tunneling and relaying of packets of any protocol.
-00012  *
-00013  *
-00014  *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
-00015  *
-00016  *  This program is free software; you can redistribute it and/or modify
-00017  *  it under the terms of the GNU General Public License version 2
-00018  *  as published by the Free Software Foundation.
-00019  *
-00020  *  This program is distributed in the hope that it will be useful,
-00021  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
-00022  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-00023  *  GNU General Public License for more details.
-00024  *
-00025  *  You should have received a copy of the GNU General Public License
-00026  *  along with this program (see the file COPYING included with this
-00027  *  distribution); if not, write to the Free Software Foundation, Inc.,
-00028  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-00029  */
-00030 
-00031 #ifndef _BUFFER_H_
-00032 #define _BUFFER_H_
-00033 
-00034 #include "datatypes.h"
-00035 
-00036 class TunDevice;
-00037 class UDPPacketSource;
-00038 
-00039 class Buffer
-00040 {
-00041 public:
-00042   Buffer();
-00043   Buffer(u_int32_t length);
-00044   Buffer(u_int8_t* data, u_int32_t length);
-00045   virtual ~Buffer();
-00046   Buffer(const Buffer &src);
-00047   void operator=(const Buffer &src);
-00048   void operator=(const seq_nr_t &src);
-00049   void operator=(const sender_id_t &src);
-00050 
-00051   // math operations to calculate IVs and keys
-00052   virtual Buffer operator^(const Buffer &xor_by) const;
-00053   virtual Buffer leftByteShift(u_int32_t width) const;
-00054   virtual Buffer rightByteShift(u_int32_t width) const;
-00055 
-00056   u_int32_t resizeFront(u_int32_t new_length);
-00057   u_int32_t resizeBack(u_int32_t new_length);
-00058   u_int32_t getLength() const;
-00059   u_int8_t* getBuf();
-00060   u_int8_t& operator[](u_int32_t index);
-00061   u_int8_t operator[](u_int32_t index) const;
-00062   void printHexDump() const;
-00063 
-00064   operator u_int8_t*(); // just for write/read tun and packetSource
-00065 protected:
-00066   friend class TunDevice;
-00067   friend class UDPPacketSource;
-00068 //  friend class AesIcmCypher;
-00069 //  friend class KeyDerivation;   // 
-00070 
-00071   u_int8_t *buf_;
-00072   u_int32_t length_;
-00073 
-00074 };
-00075 
-00076 #endif
-