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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 methods 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) 2007-2014 Markus Grüneis, Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Anytun 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 Anytun. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#ifndef ANYTUN_buffer_h_INCLUDED
#define ANYTUN_buffer_h_INCLUDED
#include "datatypes.h"
#include <string>
class TunDevice;
class UDPPacketSource;
class Buffer
{
public:
Buffer(bool allow_realloc = true);
Buffer(uint32_t length, bool allow_realloc = true);
Buffer(uint8_t* data, uint32_t length, bool allow_realloc = true);
Buffer(std::string hex_data, bool allow_realloc = true);
virtual ~Buffer();
Buffer(const Buffer& src);
void operator=(const Buffer& src);
bool operator==(const Buffer& cmp) const;
Buffer operator^(const Buffer& xor_by) const;
uint32_t getLength() const;
virtual void setLength(uint32_t new_length);
uint8_t* getBuf();
uint8_t& operator[](uint32_t index);
uint8_t operator[](uint32_t index) const;
std::string getHexDump() const;
std::string getHexDumpOneLine() const;
bool isReallocAllowed() const;
operator uint8_t*();
protected:
virtual void reinit() {};
uint8_t* buf_;
uint32_t length_;
uint32_t real_length_;
bool allow_realloc_;
static const uint32_t OVER_SIZE_ = 100;
};
#endif
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