/*
 * Secure OLSR plugin
 * http://www.olsr.org
 *
 * Copyright (c) 2004, Andreas Tønnesen(andreto@olsr.org)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following 
 * conditions are met:
 *
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright 
 *   notice, this list of conditions and the following disclaimer in 
 *   the documentation and/or other materials provided with the 
 *   distribution.
 * * Neither the name of olsrd, olsr.org nor the names of its 
 *   contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: secure_messages.h,v 1.3 2007/07/15 21:47:17 bernd67 Exp $
 */


/*
 * olsr.org olsr daemon security plugin
 */

#ifndef _OLSRD_SECURE_MSG
#define _OLSRD_SECURE_MSG


#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <time.h>
#include <math.h>
#include <stdio.h>

#include "olsr_types.h"
#include "interfaces.h"

/* The type of message you will use */
#define MESSAGE_TYPE 10

/* The type of messages we will receive - can be set to promiscuous */
#define PARSER_TYPE MESSAGE_TYPE

#define TYPE_CHALLENGE 11
#define TYPE_CRESPONSE 12
#define TYPE_RRESPONSE 13


extern char keyfile[FILENAME_MAX+1];


#ifdef USE_OPENSSL
#define SIGSIZE   20
#else
#define SIGSIZE   16
#endif

/****************************************************************************
 *                            PACKET SECTION                                *
 ****************************************************************************/

struct sig_msg
{
  olsr_u8_t     type;
  olsr_u8_t     algorithm;
  olsr_u16_t    reserved;

  time_t        timestamp;
  char          signature[SIGSIZE];
};

/*
 * OLSR message (several can exist in one OLSR packet)
 */

struct s_olsrmsg
{
  olsr_u8_t     olsr_msgtype;
  olsr_u8_t     olsr_vtime;
  olsr_u16_t    olsr_msgsize;
  olsr_u32_t    originator;
  olsr_u8_t     ttl;
  olsr_u8_t     hopcnt;
  olsr_u16_t    seqno;

  /* YOUR PACKET GOES HERE */
  struct sig_msg sig;

};


/*
 * Challenge response messages
 */

struct challengemsg
{
  olsr_u8_t     olsr_msgtype;
  olsr_u8_t     olsr_vtime;
  olsr_u16_t    olsr_msgsize;
  olsr_u32_t    originator;
  olsr_u8_t     ttl;
  olsr_u8_t     hopcnt;
  olsr_u16_t    seqno;

  olsr_u32_t    destination;
  olsr_u32_t    challenge;

  olsr_u8_t     signature[SIGSIZE];

};



struct c_respmsg
{
  olsr_u8_t     olsr_msgtype;
  olsr_u8_t     olsr_vtime;
  olsr_u16_t    olsr_msgsize;
  olsr_u32_t    originator;
  olsr_u8_t     ttl;
  olsr_u8_t     hopcnt;
  olsr_u16_t    seqno;

  olsr_u32_t    destination;
  olsr_u32_t    challenge;
  time_t        timestamp;

  olsr_u8_t     res_sig[SIGSIZE];

  olsr_u8_t     signature[SIGSIZE];
};


struct r_respmsg
{
  olsr_u8_t     olsr_msgtype;
  olsr_u8_t     olsr_vtime;
  olsr_u16_t    olsr_msgsize;
  olsr_u32_t    originator;
  olsr_u8_t     ttl;
  olsr_u8_t     hopcnt;
  olsr_u16_t    seqno;

  olsr_u32_t    destination;
  time_t        timestamp;

  olsr_u8_t     res_sig[SIGSIZE];

  olsr_u8_t     signature[SIGSIZE];
};


/*
 *IPv6
 */

struct s_olsrmsg6
{
  olsr_u8_t        olsr_msgtype;
  olsr_u8_t        olsr_vtime;
  olsr_u16_t       olsr_msgsize;
  struct in6_addr  originator;
  olsr_u8_t        ttl;
  olsr_u8_t        hopcnt;
  olsr_u16_t       seqno;

  /* YOUR PACKET GOES HERE */
  struct sig_msg   sig;
};

/*
 * Generic OLSR packet - DO NOT ALTER
 */

struct s_olsr 
{
  olsr_u16_t	  olsr_packlen;		/* packet length */
  olsr_u16_t	  olsr_seqno;
  struct s_olsrmsg  olsr_msg[1];          /* variable messages */
};


struct s_olsr6
{
  olsr_u16_t	    olsr_packlen;        /* packet length */
  olsr_u16_t	    olsr_seqno;
  struct s_olsrmsg6   olsr_msg[1];         /* variable messages */
};


#endif