/*
* $Id: isl.c,v 1.1.1.2 2023/09/27 11:11:38 misho Exp $
*
* libnet 1.1
* Build an ISL packet
*
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.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, len;
libnet_t *l;
libnet_ptag_t t;
u_char *dst;
u_long ip;
u_char dhost[5] = {0x01, 0x00, 0x0c, 0x00, 0x00};
u_char snap[6] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
char *device = NULL;
char errbuf[LIBNET_ERRBUF_SIZE];
printf("libnet 1.1 packet shaping: [ISL]\n");
device = NULL;
dst = NULL;
while ((c = getopt(argc, argv, "i:d:")) != EOF)
{
switch (c)
{
case 'd':
dst = libnet_hex_aton(optarg, &len);
break;
case 'i':
device = optarg;
break;
}
}
if (dst == NULL)
{
fprintf(stderr, "usage %s -d dst [-i interface]\n",
argv[0]);
exit(EXIT_FAILURE);
}
/*
* Initialize the library. Root privileges are required.
*/
l = libnet_init(
LIBNET_LINK, /* injection type */
device, /* network interface */
errbuf); /* errbuf */
if (l == NULL)
{
fprintf(stderr, "libnet_init() failed: %s", errbuf);
exit(EXIT_FAILURE);
}
ip = libnet_get_ipaddr4(l);
t = libnet_build_arp(
ARPHRD_ETHER, /* hardware addr */
ETHERTYPE_IP, /* protocol addr */
6, /* hardware addr size */
4, /* protocol addr size */
ARPOP_REPLY, /* operation type */
enet_src, /* sender hardware addr */
(u_char *)&ip, /* sender protocol addr */
enet_dst, /* target hardware addr */
(u_char *)&ip, /* target protocol addr */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l));
goto bad;
}
t = libnet_autobuild_ethernet(
dst, /* ethernet destination */
ETHERTYPE_ARP, /* protocol type */
l); /* libnet handle */
if (t == -1)
{
fprintf(stderr, "Can't build ethernet header: %s\n",
libnet_geterror(l));
goto bad;
}
t = libnet_build_isl(
dhost,
0x0,
0x0,
enet_src,
10 + 42,
snap,
10,
0x8000,
0,
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build ISL 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 ISL packet; check the wire.\n", c);
}
free(dst);
libnet_destroy(l);
return (EXIT_SUCCESS);
bad:
free(dst);
libnet_destroy(l);
return (EXIT_FAILURE);
}
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