Annotation of embedaddon/libnet/sample/ieee.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: ieee.c,v 1.2 2004/01/03 20:31:01 mike Exp $
! 3: *
! 4: * libnet 1.1
! 5: * Build an ieee 802.1q/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: #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, do_802_2;
! 42: u_long i;
! 43: libnet_t *l;
! 44: libnet_ptag_t t;
! 45: u_char *dst, *src, oui[3];
! 46: char *device = NULL;
! 47: char errbuf[LIBNET_ERRBUF_SIZE];
! 48:
! 49: printf("libnet 1.1 packet shaping: ieee[802.1q / 802.2 / ARP]\n");
! 50:
! 51: do_802_2 = 0;
! 52: device = NULL;
! 53: src = dst = NULL;
! 54: while ((c = getopt(argc, argv, "8d:i:s:")) != EOF)
! 55: {
! 56: switch (c)
! 57: {
! 58: case '8':
! 59: do_802_2 = 1;
! 60: break;
! 61: case 'd':
! 62: dst = libnet_hex_aton(optarg, &len);
! 63: break;
! 64: case 'i':
! 65: device = optarg;
! 66: break;
! 67: case 's':
! 68: src = libnet_hex_aton(optarg, &len);
! 69: break;
! 70: }
! 71: }
! 72:
! 73: if (src == NULL || dst == NULL)
! 74: {
! 75: fprintf(stderr, "usage %s -d dst -s src [-8 ] [-i interface]\n",
! 76: argv[0]);
! 77: exit(EXIT_FAILURE);
! 78: }
! 79:
! 80: /*
! 81: * Initialize the library. Root priviledges are required.
! 82: */
! 83: l = libnet_init(
! 84: LIBNET_LINK, /* injection type */
! 85: device, /* network interface */
! 86: errbuf); /* errbuf */
! 87:
! 88: if (l == NULL)
! 89: {
! 90: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 91: exit(EXIT_FAILURE);
! 92: }
! 93:
! 94: i = libnet_get_ipaddr4(l);
! 95:
! 96: t = libnet_build_arp(
! 97: ARPHRD_ETHER, /* hardware addr */
! 98: ETHERTYPE_IP, /* protocol addr */
! 99: 6, /* hardware addr size */
! 100: 4, /* protocol addr size */
! 101: ARPOP_REPLY, /* operation type */
! 102: src, /* sender hardware addr */
! 103: (u_char *)&i, /* sender protocol addr */
! 104: dst, /* target hardware addr */
! 105: (u_char *)&i, /* target protocol addr */
! 106: NULL, /* payload */
! 107: 0, /* payload size */
! 108: l, /* libnet handle */
! 109: 0); /* libnet id */
! 110: if (t == -1)
! 111: {
! 112: fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l));
! 113: goto bad;
! 114: }
! 115:
! 116: if (do_802_2)
! 117: {
! 118: memset(&oui, 0, 3);
! 119: t = libnet_build_802_2snap(
! 120: 0xaa, /* SNAP DSAP */
! 121: 0xaa, /* SNAP SSAP */
! 122: 0, /* control */
! 123: oui, /* oui */
! 124: ETHERTYPE_ARP, /* ARP header follows */
! 125: NULL, /* payload */
! 126: 0, /* payload size */
! 127: l, /* libnet handle */
! 128: 0); /* libnet id */
! 129: if (t == -1)
! 130: {
! 131: fprintf(stderr, "Can't build 802.2 header: %s\n", libnet_geterror(l));
! 132: goto bad;
! 133: }
! 134: }
! 135: t = libnet_build_802_1q(
! 136: dst, /* dest mac */
! 137: src, /* source mac */
! 138: ETHERTYPE_VLAN, /* TPI */
! 139: 0x006, /* priority (0 - 7) */
! 140: 0x001, /* CFI flag */
! 141: 0x100, /* vid (0 - 4095) */
! 142: do_802_2 ? LIBNET_802_2SNAP_H + LIBNET_ARP_ETH_IP_H : 0x0806,
! 143: NULL, /* payload */
! 144: 0, /* payload size */
! 145: l, /* libnet handle */
! 146: 0); /* libnet id */
! 147: if (t == -1)
! 148: {
! 149: fprintf(stderr, "Can't build 802.1q header: %s\n", libnet_geterror(l));
! 150: goto bad;
! 151: }
! 152: /*
! 153: * Write it to the wire.
! 154: */
! 155: c = libnet_write(l);
! 156:
! 157: if (c == -1)
! 158: {
! 159: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
! 160: goto bad;
! 161: }
! 162: else
! 163: {
! 164: fprintf(stderr, "Wrote %d byte 802.1q packet; check the wire.\n", c);
! 165: }
! 166: free(dst);
! 167: free(src);
! 168: libnet_destroy(l);
! 169: return (EXIT_SUCCESS);
! 170: bad:
! 171: free(dst);
! 172: free(src);
! 173: libnet_destroy(l);
! 174: return (EXIT_FAILURE);
! 175: }
! 176:
! 177: /* EOF */
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