/*
 *  Copyright (c) 1998, 1999 route|daemon9 <route@infonexus.com>
 *  All rights reserved.
 * 
 *  Modified to winarps.c 1999 by kay <kay@phreedom.org> 
 *
 * 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.
 *
 */

#include <libnet.h>

u_char enet_src[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
u_char enet_dst[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
u_long ip_dst = 0;

void send_arp(struct link_int *, u_char *);

#if (__linux__)
#define  IPOPT_SECURITY  130
#endif

int main(int argc, char *argv[])
{
  int c, count = 1;
  char errbuf[256];
  char *device = NULL;
  char *address = NULL;
  struct link_int *l;

  while ((c = getopt(argc, argv, "i:d:c:")) != EOF)
    {
      switch (c)
        {
        case 'i':
          device = optarg;
          break;
        case 'd':
          address = optarg;
          ip_dst = name_resolve(address, 0);
          break;
        case 'c':
          count = atoi(optarg);
          break;
        default:
          exit(EXIT_FAILURE);
        }
    }

  if (!device)
    {
      fprintf(stderr, "Specify a device\n");
      exit(EXIT_FAILURE);
    }
  if (!ip_dst)
    {
      fprintf(stderr, "Specify destination\n");
      exit(EXIT_FAILURE);
    }
  if ((l = open_link_interface(device, errbuf)) == NULL)
    {
      fprintf(stderr, "open_link_interface: %s\n", errbuf);
      exit(EXIT_FAILURE);
    }
  send_arp(l, device);
  exit(EXIT_SUCCESS);
}


void send_arp(struct link_int *l, u_char * device)
{
  int n;
  u_char *buf;

  buf = (u_char *) malloc(ARP_H + ETH_H);
  if (!buf)
    {
      perror("no packet memory");
      exit(EXIT_FAILURE);
    }
  memset(buf, 0, ARP_H + ETH_H);

  build_ethernet(enet_dst, enet_src, ETHERTYPE_ARP, NULL, 0, buf);
  build_arp(ARPHRD_ETHER, ETHERTYPE_IP, 6, 4, ARPOP_REQUEST, enet_src,
            (void *)&ip_dst, enet_dst, (void *)&ip_dst, NULL, 0, buf + ETH_H);
  n = write_link_layer(l, device, buf, ARP_H + ETH_H);

  printf("Wrote %d byte ARP packet through linktype %d\n", n, l->linktype);
}