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1.1.6

    1: /*
    2:  *  $Id: arp.c,v 1.1.1.2 2013/07/22 11:54:41 misho Exp $
    3:  *
    4:  *  libnet 1.1
    5:  *  Build an ARP 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: #if ((_WIN32) && !(__CYGWIN__)) 
   35: #include "../include/win32/config.h"
   36: #else
   37: #include "../include/config.h"
   38: #endif
   39: #endif
   40: #include "./libnet_test.h"
   41: 
   42: int
   43: main(int argc, char *argv[])
   44: {
   45:     int c;
   46:     uint32_t i;
   47:     libnet_t *l;
   48:     libnet_ptag_t t;
   49:     char *device = NULL;
   50:     uint8_t *packet;
   51:     uint32_t packet_s;
   52:     char errbuf[LIBNET_ERRBUF_SIZE];
   53: 
   54:     printf("libnet 1.1 packet shaping: ARP[link -- autobuilding ethernet]\n"); 
   55: 
   56:     if (argc > 1)
   57:     {
   58:          device = argv[1];
   59:     }
   60: 
   61:     l = libnet_init(
   62:             LIBNET_LINK_ADV,                        /* injection type */
   63:             device,                                 /* network interface */
   64:             errbuf);                                /* errbuf */
   65: 
   66:     if (l == NULL)
   67:     {
   68:         fprintf(stderr, "%s", errbuf);
   69:         exit(EXIT_FAILURE);
   70:     }
   71: 	else
   72: 
   73:     i = libnet_get_ipaddr4(l);
   74:   
   75:     t = libnet_build_arp(
   76:             ARPHRD_ETHER,                           /* hardware addr */
   77:             ETHERTYPE_IP,                           /* protocol addr */
   78:             6,                                      /* hardware addr size */
   79:             4,                                      /* protocol addr size */
   80:             ARPOP_REPLY,                            /* operation type */
   81:             enet_src,                               /* sender hardware addr */
   82:             (uint8_t *)&i,                         /* sender protocol addr */
   83:             enet_dst,                               /* target hardware addr */
   84:             (uint8_t *)&i,                         /* target protocol addr */
   85:             NULL,                                   /* payload */
   86:             0,                                      /* payload size */
   87:             l,                                      /* libnet context */
   88:             0);                                     /* libnet id */
   89:     if (t == -1)
   90:     {
   91:         fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l));
   92:         goto bad;
   93:     }
   94: 
   95:     t = libnet_autobuild_ethernet(
   96:             enet_dst,                               /* ethernet destination */
   97:             ETHERTYPE_ARP,                          /* protocol type */
   98:             l);                                     /* libnet handle */
   99:     if (t == -1)
  100:     {
  101:         fprintf(stderr, "Can't build ethernet header: %s\n",
  102:                 libnet_geterror(l));
  103:         goto bad;
  104:     }
  105: 
  106: 
  107:     if (libnet_adv_cull_packet(l, &packet, &packet_s) == -1)
  108:     {
  109:         fprintf(stderr, "%s", libnet_geterror(l));
  110:     }
  111:     else
  112:     {
  113:         fprintf(stderr, "packet size: %d\n", packet_s);
  114:         libnet_adv_free_packet(l, packet);
  115:     }
  116: 
  117:     c = libnet_write(l);
  118: 
  119:     if (c == -1)
  120:     {
  121:         fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
  122:         goto bad;
  123:     }
  124:     else
  125:     {
  126:         fprintf(stderr, "Wrote %d byte ARP packet from context \"%s\"; "
  127:                 "check the wire.\n", c, libnet_cq_getlabel(l));
  128:     }
  129:     libnet_destroy(l);
  130:     return (EXIT_SUCCESS);
  131: bad:
  132:     libnet_destroy(l);
  133:     return (EXIT_FAILURE);
  134: }
  135: 
  136: /* EOF */