lib/Libnet/test/ICMP/silvertongue.c

   1 /*
   2  *  $Id: silvertongue.c,v 1.1.1.1 2000/05/25 00:28:49 route Exp $
   3  *
   4  *  libnet
   5  *  silvertongue.c - ICMP_REDIRECT Packet assembly tester
   6  *
   7  *  Written by Nicholas Brawn with some modifications by Mike D. Schiffman.
   8  *  Copyright (c) 1999, 2000 Nicholas Brawn <nick@feralmonkey.org>
   9  *  Copyright (c) 1998, 1999, 2000 Mike D. Schiffman <mike@infonexus.com>
  10  *  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  */
  34
  35 #if (HAVE_CONFIG_H)
  36 #include "../../include/config.h"
  37 #endif
  38 #include "../libnet_test.h"
  39
  40 int
  41 main(int argc, char **argv)
  42 {
  43     int sockfd, c;
  44     u_char *buf;
  45     u_long src, dst, gateway;
  46
  47     if (argc < 4)
  48     {
  49         fprintf(stderr,
  50                 "usage: %s <old_router> <target> <new_gateway>\n",
  51                 argv[0]);
  52         exit(EXIT_FAILURE);
  53     }
  54
  55     if (!(src = libnet_name_resolve(argv[1], 1)))
  56     {
  57         perror("Error resolving source host");
  58         exit(EXIT_FAILURE);
  59     }
  60
  61     if (!(dst = libnet_name_resolve(argv[2], 1)))
  62     {
  63         perror("Error resolving destination host");
  64         exit(EXIT_FAILURE);
  65     }
  66
  67     if (!(gateway = libnet_name_resolve(argv[3], 1)))
  68     {
  69         perror("Error resolving gateway host");
  70         exit(EXIT_FAILURE);
  71     }
  72
  73     if (libnet_init_packet(IP_MAXPACKET, &buf) == -1)
  74     {
  75         perror("Couldn't allocate memory for header");
  76         exit(EXIT_FAILURE);
  77     }
  78
  79     if ((sockfd = libnet_open_raw_sock(IPPROTO_RAW)) == -1)
  80     {
  81         perror("Couldn't open raw socket");
  82         exit(EXIT_FAILURE);
  83     }
  84
  85     libnet_build_ip(LIBNET_ICMP_REDIRECT_H + LIBNET_IP_H,
  86                 IPTOS_LOWDELAY | IPTOS_THROUGHPUT,
  87                 242,
  88                 0,
  89                 48,
  90                 IPPROTO_ICMP,
  91                 src,
  92                 dst,
  93                 NULL,
  94                 0,
  95                 buf);
  96
  97     libnet_build_icmp_redirect(
  98                 ICMP_REDIRECT,
  99                 ICMP_UNREACH_HOST,
 100                 gateway,
 101                 0,                                  /* just an ip header */
 102                 IPTOS_LOWDELAY | IPTOS_THROUGHPUT,  /* IP tos */
 103                 424,                                /* IP ID */
 104                 0,                                  /* Frag stuff */
 105                 64,                                 /* TTL */
 106                 IPPROTO_ICMP,                       /* Transport protocol */
 107                 dst,                                /* Source IP */
 108                 src,                                /* Destination IP */
 109                 NULL,                               /* pointer to payload */
 110                 0,                                  /* size of payload */
 111                 buf + LIBNET_IP_H);                 /* packet header memory */
 112
 113
 114
 115     libnet_do_checksum(buf, IPPROTO_ICMP, LIBNET_ICMP_REDIRECT_H +
 116                 LIBNET_IP_H);
 117
 118     c = libnet_write_ip(sockfd, buf, LIBNET_ICMP_REDIRECT_H + 2 *
 119                 LIBNET_IP_H);
 120     if (c != LIBNET_ICMP_REDIRECT_H + 2 * LIBNET_IP_H)
 121     {
 122         fprintf(stderr, "Error writing to socket, only wrote %d bytes\n", c);
 123         exit(EXIT_FAILURE);
 124     }
 125     printf("Completed, wrote %d bytes\n", c);
 126     libnet_destroy_packet(&buf);
 127
 128     exit(EXIT_SUCCESS);
 129 }