anytun: packet.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 _PACKET_H_
-00032 #define _PACKET_H_
-00033 
-00034 #include "datatypes.h"
-00035 #include "buffer.h"
-00036 
-00037 class Packet : public Buffer
-00038 {
-00039 public:
-00040   Packet();
-00041   Packet(u_int32_t length);
-00042   Packet(const Buffer &src);
-00043   
-00044   bool hasHeader() const;
-00045   Packet& withHeader(bool b);
-00046   seq_nr_t getSeqNr() const;
-00047   sender_id_t getSenderId() const;
-00048   Packet& addHeader(seq_nr_t seq_nr, sender_id_t sender_id);
-00049   Packet& removeHeader();
-00050   Packet& setSeqNr(seq_nr_t seq_nr);
-00051   Packet& setSenderId(sender_id_t sender_id);
-00052                        
-00053   bool hasPayloadType() const;
-00054   Packet& withPayloadType(bool b);
-00055   payload_type_t getPayloadType() const;  
-00056   Packet& addPayloadType(payload_type_t payload_type);
-00057   Packet& removePayloadType();
-00058   
-00059   bool hasAuthTag() const;
-00060   Packet& withAuthTag(bool b);
-00061   auth_tag_t getAuthTag() const;
-00062   Packet& addAuthTag(auth_tag_t auth_tag);
-00063   Packet& removeAuthTag();                     
-00064 
-00065 private:
-00066   struct HeaderStruct
-00067   {
-00068     seq_nr_t seq_nr;
-00069     sender_id_t sender_id;
-00070   }__attribute__((__packed__));
-00071   bool has_header_;
-00072   bool has_payload_type_;
-00073   bool has_auth_tag_;
-00074 };
-00075 
-00076 #endif
-