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| Current File : //compat/linux/proc/self/root/usr/local/share/examples/libnet11/stp.c |
/*
* $Id: stp.c,v 1.3 2004/01/21 19:01:29 mike Exp $
*
* libnet 1.1
* Build an STP frame
*
* 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"
#define CONF 1
#define TCN 2
int
main(int argc, char *argv[])
{
int c, len, type;
libnet_t *l;
libnet_ptag_t t;
u_char *dst, *src;
u_char rootid[8], bridgeid[8];
char *device = NULL;
char errbuf[LIBNET_ERRBUF_SIZE];
printf("libnet 1.1 packet shaping: [STP]\n");
device = NULL;
src = dst = NULL;
type = CONF;
while ((c = getopt(argc, argv, "cd:i:s:t")) != EOF)
{
switch (c)
{
case 'c':
type = CONF;
break;
case 'd':
dst = libnet_hex_aton(optarg, &len);
break;
case 'i':
device = optarg;
break;
case 's':
src = libnet_hex_aton(optarg, &len);
break;
case 't':
type = TCN;
break;
default:
usage(argv[0]);
exit(EXIT_FAILURE);
}
}
if (src == NULL || dst == NULL)
{
usage(argv[0]);
exit(EXIT_FAILURE);
}
/*
* Initialize the library. Root priviledges 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);
}
if (type == CONF)
{
rootid[0] = 0x80;
rootid[1] = 0x00;
rootid[2] = 0x00;
rootid[3] = 0x07;
rootid[4] = 0xec;
rootid[5] = 0xae;
rootid[6] = 0x30;
rootid[7] = 0x41;
bridgeid[0] = 0x80;
bridgeid[1] = 0x00;
bridgeid[2] = 0x00;
bridgeid[3] = 0x07;
bridgeid[4] = 0xec;
bridgeid[5] = 0xae;
bridgeid[6] = 0x30;
bridgeid[7] = 0x41;
t = libnet_build_stp_conf(
0x0000, /* protocol id */
0x00, /* protocol version */
0x00, /* BPDU type */
0x00, /* BPDU flags */
rootid, /* root id */
0x00000001, /* root path cost */
bridgeid, /* bridge id */
0x8002, /* port id */
0x00, /* message age */
0x0014, /* max age */
0x0002, /* hello time */
0x000f, /* forward delay */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build STP conf header: %s\n",
libnet_geterror(l));
goto bad;
}
}
else
{
t = libnet_build_stp_tcn(
0x0000, /* protocol id */
0x00, /* protocol version */
0x80, /* BPDU type */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build STP tcn header: %s\n",
libnet_geterror(l));
goto bad;
}
}
t = libnet_build_802_2(
LIBNET_SAP_STP, /* DSAP */
LIBNET_SAP_STP, /* SSAP */
0x03, /* control */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build ethernet header: %s\n",
libnet_geterror(l));
goto bad;
}
t = libnet_build_802_3(
dst, /* ethernet destination */
src, /* ethernet source */
LIBNET_802_2_H + ((type == CONF) ? LIBNET_STP_CONF_H :
LIBNET_STP_TCN_H), /* frame size */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0); /* libnet id */
if (t == -1)
{
fprintf(stderr, "Can't build ethernet 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 STP packet; check the wire.\n", c);
}
free(dst);
free(src);
libnet_destroy(l);
return (EXIT_SUCCESS);
bad:
free(dst);
free(src);
libnet_destroy(l);
return (EXIT_FAILURE);
}
void
usage(char *name)
{
fprintf(stderr, "usage %s -d dst -s src -t -c [-i interface]\n",
name);
}
/* EOF */