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libnet

    1: /*
    2:  *  $Id: icmp_timestamp.c,v 1.1.1.1 2012/02/21 22:14:23 misho Exp $
    3:  *
    4:  *  libnet 1.1
    5:  *  Build an ICMP_TSTAMP packet
    6:  *
    7:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
    8:  *  All rights reserved.
    9:  *
   10:  * Redistribution and use in source and binary forms, with or without
   11:  * modification, are permitted provided that the following conditions
   12:  * are met:
   13:  * 1. Redistributions of source code must retain the above copyright
   14:  *    notice, this list of conditions and the following disclaimer.
   15:  * 2. Redistributions in binary form must reproduce the above copyright
   16:  *    notice, this list of conditions and the following disclaimer in the
   17:  *    documentation and/or other materials provided with the distribution.
   18:  *
   19:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29:  * SUCH DAMAGE.
   30:  *
   31:  */
   32: 
   33: #if (HAVE_CONFIG_H)
   34: #include "../include/config.h"
   35: #endif
   36: #include "./libnet_test.h"
   37: 
   38: int
   39: main(int argc, char **argv)
   40: {
   41:     int c;
   42:     libnet_t *l;
   43:     libnet_ptag_t t;
   44:     u_long src_ip, dst_ip;
   45:     char errbuf[LIBNET_ERRBUF_SIZE];
   46: 
   47:     printf("libnet 1.1 packet shaping: ICMP timestamp[raw]\n");
   48: 
   49:     /*
   50:      *  Initialize the library.  Root priviledges are required.
   51:      */
   52:     l = libnet_init(
   53:             LIBNET_RAW4,                            /* injection type */
   54:             NULL,                                   /* network interface */
   55:             errbuf);                                /* errbuf */
   56:  
   57:     if (l == NULL)
   58:     {
   59:         fprintf(stderr, "libnet_init() failed: %s", errbuf);
   60:         exit(EXIT_FAILURE);
   61:     }
   62: 
   63:     src_ip = 0;
   64:     dst_ip = 0;
   65:     while((c = getopt(argc, argv, "d:s:")) != EOF)
   66:     {
   67:         switch (c)
   68:         {
   69:             case 'd':
   70:                 if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
   71:                 {
   72:                     fprintf(stderr, "Bad destination IP address: %s\n", optarg);
   73:                     exit(1);
   74:                 }
   75:                 break;
   76:             case 's':
   77:                 if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
   78:                 {
   79:                     fprintf(stderr, "Bad source IP address: %s\n", optarg);
   80:                     exit(1);
   81:                 }
   82:                 break;
   83:         }
   84:     }
   85:     if (!src_ip || !dst_ip)
   86:     {
   87:         usage(argv[0]);
   88:         exit(EXIT_FAILURE);
   89:     }
   90: 
   91:     t = libnet_build_icmpv4_timestamp(
   92:         ICMP_TSTAMP,                                /* type */
   93:         0,                                          /* code */
   94:         0,                                          /* checksum */
   95:         242,                                        /* id */
   96:         424,                                        /* sequence number */
   97:         1000,                                       /* otime */
   98:         2000,                                       /* rtime */
   99:         3000,                                       /* ttime */
  100:         NULL,                                       /* payload */
  101:         0,                                          /* payload size */
  102:         l,                                          /* libnet handle */
  103:         0);
  104:     if (t == -1)
  105:     {
  106:         fprintf(stderr, "Can't build ICMP header: %s\n", libnet_geterror(l));
  107:         goto bad;
  108:     }
  109: 
  110:     t = libnet_build_ipv4(
  111:         LIBNET_IPV4_H + LIBNET_ICMPV4_TS_H,         /* length */
  112:         0,                                          /* TOS */
  113:         242,                                        /* IP ID */
  114:         0,                                          /* IP Frag */
  115:         64,                                         /* TTL */
  116:         IPPROTO_ICMP,                               /* protocol */
  117:         0,                                          /* checksum */
  118:         src_ip,                                     /* source IP */
  119:         dst_ip,                                     /* destination IP */
  120:         NULL,                                       /* payload */
  121:         0,                                          /* payload size */
  122:         l,                                          /* libnet handle */
  123:         0);
  124:     if (t == -1)
  125:     {
  126:         fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
  127:         goto bad;
  128:     }
  129: 
  130:     /*
  131:      *  Write it to the wire.
  132:      */
  133:     c = libnet_write(l);
  134:     if (c == -1)
  135:     {
  136:         fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
  137:         goto bad;
  138:     }
  139:     else
  140:     {
  141:         fprintf(stderr, "Wrote %d byte ICMP packet; check the wire.\n", c);
  142:     }
  143:     libnet_destroy(l);
  144:     return (EXIT_SUCCESS);
  145: bad:
  146:     libnet_destroy(l);
  147:     return (EXIT_FAILURE);
  148: }
  149: 
  150: 
  151: void
  152: usage(char *name)
  153: {
  154:     fprintf(stderr, "usage: %s -s source_ip -d destination_ip\n ", name);
  155: }
  156: 
  157: /* EOF */