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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007 anytun.org <satp@wirdorange.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _BUFFER_H_
#define _BUFFER_H_
#include "datatypes.h"
class TunDevice;
class UDPPacketSource;
class Buffer
{
public:
Buffer();
Buffer(u_int32_t length);
Buffer(u_int8_t* data, u_int32_t length);
virtual ~Buffer();
Buffer(const Buffer &src);
void operator=(const Buffer &src);
bool operator==(const Buffer &cmp) const;
// math operations to calculate IVs and keys
virtual Buffer operator^(const Buffer &xor_by) const;
virtual Buffer leftByteShift(u_int32_t width) const;
virtual Buffer rightByteShift(u_int32_t width) const;
u_int32_t resizeFront(u_int32_t new_length);
u_int32_t resizeBack(u_int32_t new_length);
u_int32_t getLength() const;
u_int8_t* getBuf();
u_int8_t& operator[](u_int32_t index);
u_int8_t operator[](u_int32_t index) const;
void printHexDump() const;
operator u_int8_t*(); // just for write/read tun and packetSource
protected:
friend class TunDevice;
friend class UDPPacketSource;
friend class AesIcmCypher;
friend class KeyDerivation; //
u_int8_t *buf_;
u_int32_t length_;
};
#endif
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