/*

* $Id: ospf_lsa.c,v 1.2 2004/01/03 20:31:01 mike Exp $

*

* libnet 1.1

* Build an OSPF LSA packet

*

* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>

* All rights reserved.

*

* Copyright (c) 1999, 2000 Andrew Reiter <areiter@bindview.com>

* All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. 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.

*

* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.

*

*/

#if (HAVE_CONFIG_H)

#include "../include/config.h"

#endif

#include "./libnet_test.h"

int

main(int argc, char **argv)

{

int c;

libnet_t *l;

libnet_ptag_t t;

u_long src, dst;

u_char auth[8] = {0,0,0,0,0,0,0,0};

char *from, *to, errbuf[LIBNET_ERRBUF_SIZE];

printf("libnet 1.1 OSPF LSA packet shaping[raw]\n");

if (argc != 3)

{

usage(argv[0]);

}

from = argv[1];

to = argv[2];

/*

* Initialize the library. Root priviledges are required.

*/

l = libnet_init(

LIBNET_RAW4, /* injection type */

NULL, /* network interface */

errbuf); /* errbuf */

if (l == NULL)

{

fprintf(stderr, "libnet_init() failed: %s", errbuf);

exit(EXIT_FAILURE);

}

/* Too lazy to check for error */

src = libnet_name2addr4(l, from, LIBNET_DONT_RESOLVE);

dst = libnet_name2addr4(l, to, LIBNET_DONT_RESOLVE);

t = libnet_build_ospfv2_lsa_net(

0xffffff00, /* netmask */

0xc0ffee00, /* router id */

NULL, /* payload */

0, /* payload size */

l, /* libnet handle */

0); /* libnet id */

if (t == -1)

{

fprintf(stderr, "Can't build LSA net header: %s\n", libnet_geterror(l));

goto bad;

}

t = libnet_build_ospfv2_lsa(

40, /* packet age */

0, /* options */

LIBNET_LS_TYPE_NET, /* type */

htonl(0xc0ffee00), /* LS id */

src, /* ad router */

0x11111111, /* seq */

0xffff, /* checksum */

LIBNET_OSPF_LS_NET_H + LIBNET_OSPF_LSA_H, /* packet length */

NULL, /* payload */

0, /* payload size */

l, /* libnet handle */

0); /* libnet id */

if (t == -1)

{

fprintf(stderr, "Can't build LSA header: %s\n", libnet_geterror(l));

goto bad;

}

/* authentication data */

t = libnet_build_data(

auth, /* auth data */

LIBNET_OSPF_AUTH_H, /* payload size */

l, /* libnet handle */

0); /* libnet id */

if (t == -1)

{

fprintf(stderr, "Can't build OSPF AUTH header: %s\n", libnet_geterror(l));

goto bad;

}

t = libnet_build_ospfv2(

LIBNET_OSPF_LSA_H + LIBNET_OSPF_AUTH_H +

LIBNET_OSPF_LS_NET_H, /* OSPF packet length */

LIBNET_OSPF_LSA, /* OSPF packet type */

htonl(0xd000000d), /* router id */

htonl(0xc0ffee00), /* area id */

0, /* checksum */

LIBNET_OSPF_AUTH_NULL, /* auth type */

NULL, /* payload */

0, /* payload size */

l, /* libnet handle */

0); /* libnet id */

if (t == -1)

{

fprintf(stderr, "Can't build OSPF header: %s\n", libnet_geterror(l));

goto bad;

}

t = libnet_build_ipv4(

LIBNET_IPV4_H + LIBNET_OSPF_H + LIBNET_OSPF_AUTH_H +

LIBNET_OSPF_LSA_H + LIBNET_OSPF_LS_NET_H, /* packet total length */

0, /* TOS */

101, /* IP iD */

IP_DF, /* IP frag */

254, /* TTL */

IPPROTO_OSPF, /* protocol */

0, /* checksum */

src, /* source IP */

dst, /* destination IP */

NULL, /* payload */

0, /* payload size */

l, /* libnet handle */

0); /* libnet id */

if (t == -1)

{

fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));

goto bad;

}

/*

* Write it to the wire.

*/

c = libnet_write(l);

if (c == -1)

{

fprintf(stderr, "Write error: %s\n", libnet_geterror(l));

goto bad;

}

else

{

fprintf(stderr, "Wrote %d byte OSPF packet; check the wire.\n",

c);

}

libnet_destroy(l);

return (EXIT_SUCCESS);

bad:

libnet_destroy(l);

return (EXIT_FAILURE);

}

void

usage(char *pname)

{

printf("Usage: %s <source ip> <dest. ip>\n", pname);

exit(0);

}