Annotation of embedaddon/libnet/sample/isl.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: isl.c,v 1.2 2004/01/03 20:31:01 mike Exp $
! 3: *
! 4: * libnet 1.1
! 5: * Build an ISL 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, len;
! 42: libnet_t *l;
! 43: libnet_ptag_t t;
! 44: u_char *dst;
! 45: u_long ip;
! 46: u_char dhost[5] = {0x01, 0x00, 0x0c, 0x00, 0x00};
! 47: u_char snap[6] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
! 48: char *device = NULL;
! 49: char errbuf[LIBNET_ERRBUF_SIZE];
! 50:
! 51: printf("libnet 1.1 packet shaping: [ISL]\n");
! 52:
! 53: device = NULL;
! 54: dst = NULL;
! 55: while ((c = getopt(argc, argv, "i:d:")) != EOF)
! 56: {
! 57: switch (c)
! 58: {
! 59: case 'd':
! 60: dst = libnet_hex_aton(optarg, &len);
! 61: break;
! 62: case 'i':
! 63: device = optarg;
! 64: break;
! 65: }
! 66: }
! 67:
! 68: if (dst == NULL)
! 69: {
! 70: fprintf(stderr, "usage %s -d dst [-i interface]\n",
! 71: argv[0]);
! 72: exit(EXIT_FAILURE);
! 73: }
! 74:
! 75: /*
! 76: * Initialize the library. Root priviledges are required.
! 77: */
! 78: l = libnet_init(
! 79: LIBNET_LINK, /* injection type */
! 80: device, /* network interface */
! 81: errbuf); /* errbuf */
! 82:
! 83: if (l == NULL)
! 84: {
! 85: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 86: exit(EXIT_FAILURE);
! 87: }
! 88:
! 89: ip = libnet_get_ipaddr4(l);
! 90:
! 91: t = libnet_build_arp(
! 92: ARPHRD_ETHER, /* hardware addr */
! 93: ETHERTYPE_IP, /* protocol addr */
! 94: 6, /* hardware addr size */
! 95: 4, /* protocol addr size */
! 96: ARPOP_REPLY, /* operation type */
! 97: enet_src, /* sender hardware addr */
! 98: (u_char *)&ip, /* sender protocol addr */
! 99: enet_dst, /* target hardware addr */
! 100: (u_char *)&ip, /* target protocol addr */
! 101: NULL, /* payload */
! 102: 0, /* payload size */
! 103: l, /* libnet handle */
! 104: 0); /* libnet id */
! 105: if (t == -1)
! 106: {
! 107: fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l));
! 108: goto bad;
! 109: }
! 110:
! 111: t = libnet_autobuild_ethernet(
! 112: dst, /* ethernet destination */
! 113: ETHERTYPE_ARP, /* protocol type */
! 114: l); /* libnet handle */
! 115: if (t == -1)
! 116: {
! 117: fprintf(stderr, "Can't build ethernet header: %s\n",
! 118: libnet_geterror(l));
! 119: goto bad;
! 120: }
! 121:
! 122: t = libnet_build_isl(
! 123: dhost,
! 124: 0x0,
! 125: 0x0,
! 126: enet_src,
! 127: 10 + 42,
! 128: snap,
! 129: 10,
! 130: 0x8000,
! 131: 0,
! 132: NULL, /* payload */
! 133: 0, /* payload size */
! 134: l, /* libnet handle */
! 135: 0); /* libnet id */
! 136: if (t == -1)
! 137: {
! 138: fprintf(stderr, "Can't build ISL header: %s\n",
! 139: libnet_geterror(l));
! 140: goto bad;
! 141: }
! 142:
! 143:
! 144: /*
! 145: * Write it to the wire.
! 146: */
! 147: c = libnet_write(l);
! 148:
! 149: if (c == -1)
! 150: {
! 151: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
! 152: goto bad;
! 153: }
! 154: else
! 155: {
! 156: fprintf(stderr, "Wrote %d byte ISL packet; check the wire.\n", c);
! 157: }
! 158: free(dst);
! 159: libnet_destroy(l);
! 160: return (EXIT_SUCCESS);
! 161: bad:
! 162: free(dst);
! 163: libnet_destroy(l);
! 164: return (EXIT_FAILURE);
! 165: }
! 166:
! 167: /* EOF */
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