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/*
* $Id: ospf_hello.c,v 1.3 2004/11/09 07:05:07 mike Exp $
*
* libnet 1.1
* Build an OSPF Hello 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;
char errbuf[LIBNET_ERRBUF_SIZE];
char *to, *from;
u_char auth[8] = {0,0,0,0,0,0,0,0};
printf("libnet 1.1 OSPF Hello 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_hello(
0xffffffff, /* netmask */
2, /* interval */
0x00, /* options */
0x00, /* priority */
30, /* dead int */
src, /* router */
src, /* router */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build OSPF HELLO 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_HELLO_H + LIBNET_OSPF_AUTH_H, /* OSPF packet length */
LIBNET_OSPF_HELLO, /* 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_HELLO_H + LIBNET_OSPF_AUTH_H, /* packet total legnth */
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> <neighbor>\n", pname);
exit(EXIT_SUCCESS);
}
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