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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 _PACKET_H_
#define _PACKET_H_
#include "datatypes.h"
#include "buffer.h"
#include "authTag.h"
class Packet : public Buffer
{
public:
Packet();
/**
* Packet Constructor
* @param payload_length Payload Length
*/
Packet(u_int32_t payload_length);
Packet(const Buffer &src);
bool hasHeader() const;
Packet& withHeader(bool b);
seq_nr_t getSeqNr() const;
sender_id_t getSenderId() const;
Packet& addHeader(seq_nr_t seq_nr, sender_id_t sender_id);
Packet& removeHeader();
Packet& setSeqNr(seq_nr_t seq_nr);
Packet& setSenderId(sender_id_t sender_id);
bool hasPayloadType() const;
Packet& withPayloadType(bool b);
payload_type_t getPayloadType() const;
Packet& addPayloadType(payload_type_t payload_type);
Packet& removePayloadType();
bool hasAuthTag() const;
Packet& withAuthTag(bool b);
AuthTag getAuthTag() const;
Packet& addAuthTag(AuthTag auth_tag);
Packet& removeAuthTag();
private:
struct HeaderStruct
{
seq_nr_t seq_nr;
sender_id_t sender_id;
}__attribute__((__packed__));
bool has_header_;
bool has_payload_type_;
bool has_auth_tag_;
struct HeaderStruct* header_;
payload_type_t* payload_type_;
AuthTag* auth_tag_;
static const u_int32_t AUTHTAG_SIZE = 10;
};
#endif
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