Annotation of embedaddon/libnet/sample/cdp.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: cdp.c,v 1.2 2004/01/03 20:31:01 mike Exp $
! 3: *
! 4: * libnet 1.1
! 5: * Build an CDP 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 *value;
! 45: u_char values[100];
! 46: u_short tmp;
! 47: u_long tmp2;
! 48: char *device = NULL;
! 49: char errbuf[LIBNET_ERRBUF_SIZE];
! 50:
! 51: printf("libnet 1.1 packet shaping: CDP[link]\n");
! 52: /*
! 53: * Initialize the library. Root priviledges are required.
! 54: */
! 55: l = libnet_init(
! 56: LIBNET_LINK, /* injection type */
! 57: device, /* network interface */
! 58: errbuf); /* errbuf */
! 59:
! 60: if (l == NULL)
! 61: {
! 62: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 63: exit(EXIT_FAILURE);
! 64: }
! 65:
! 66: value = "switch";
! 67: len = strlen(value);
! 68:
! 69: t = libnet_build_cdp(
! 70: 1, /* version */
! 71: 30, /* time to live */
! 72: 0, /* checksum */
! 73: LIBNET_CDP_DEVID, /* type */
! 74: len, /* length */
! 75: value, /* value */
! 76: NULL, /* payload */
! 77: 0, /* payload size */
! 78: l, /* libnet handle */
! 79: 0); /* libnet id */
! 80: if (t == -1)
! 81: {
! 82: fprintf(stderr, "Can't build CDP header: %s\n", libnet_geterror(l));
! 83: goto bad;
! 84: }
! 85:
! 86: memset(values, 0, sizeof(values));
! 87: tmp = htons(LIBNET_CDP_PORTID);
! 88: memcpy(values, &tmp, 2);
! 89: tmp = htons(0x0014);
! 90: memcpy(values + 2, &tmp, 2);
! 91: memcpy(values + 4, (u_char *)"FastEthernet0/20", 16);
! 92: t = libnet_build_data(
! 93: values,
! 94: 20,
! 95: l,
! 96: 0);
! 97: if (t == -1)
! 98: {
! 99: fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l));
! 100: goto bad;
! 101: }
! 102: memset(values, 0, sizeof(values));
! 103: tmp = htons(LIBNET_CDP_CAPABIL);
! 104: memcpy(values, &tmp, 2);
! 105: tmp = htons(0x0008);
! 106: memcpy(values + 2, &tmp, 2);
! 107: tmp2 = htonl((LIBNET_CDP_CAP_L2S | LIBNET_CDP_CAP_L2B));
! 108: memcpy(values + 4, &tmp2, 4);
! 109: t = libnet_build_data(
! 110: values,
! 111: 8,
! 112: l,
! 113: 0);
! 114: if (t == -1)
! 115: {
! 116: fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l));
! 117: goto bad;
! 118: }
! 119: memset(values, 0, sizeof(values));
! 120: tmp = htons(LIBNET_CDP_VERSION);
! 121: memcpy(values, &tmp, 2);
! 122: tmp = htons(0x001f);
! 123: memcpy(values + 2, &tmp, 2);
! 124: memcpy(values + 4, (u_char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26);
! 125: t = libnet_build_data(
! 126: values,
! 127: 31,
! 128: l,
! 129: 0);
! 130: if (t == -1)
! 131: {
! 132: fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l));
! 133: goto bad;
! 134: }
! 135: memset(values, 0, sizeof(values));
! 136: tmp = htons(LIBNET_CDP_PLATFORM);
! 137: memcpy(values, &tmp, 2);
! 138: tmp = htons(0x0015);
! 139: memcpy(values + 2, &tmp, 2);
! 140: memcpy(values + 4, (u_char *)"cisco WS-C2924-XL", 17);
! 141: t = libnet_build_data(
! 142: values,
! 143: 21,
! 144: l,
! 145: 0);
! 146: if (t == -1)
! 147: {
! 148: fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l));
! 149: goto bad;
! 150: }
! 151:
! 152: t = libnet_build_ethernet(
! 153: enet_dst, /* ethernet destination */
! 154: enet_src, /* ethernet source */
! 155: 0x2000, /* protocol type */
! 156: NULL, /* payload */
! 157: 0, /* payload size */
! 158: l, /* libnet handle */
! 159: 0); /* libnet id */
! 160: if (t == -1)
! 161: {
! 162: fprintf(stderr, "Can't build ethernet header: %s\n", libnet_geterror(l));
! 163: goto bad;
! 164: }
! 165:
! 166: /*
! 167: * Write it to the wire.
! 168: */
! 169: c = libnet_write(l);
! 170:
! 171: if (c == -1)
! 172: {
! 173: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
! 174: goto bad;
! 175: }
! 176: else
! 177: {
! 178: fprintf(stderr, "Wrote %d byte CDP packet; check the wire.\n", c);
! 179: }
! 180: libnet_destroy(l);
! 181: return (EXIT_SUCCESS);
! 182: bad:
! 183: libnet_destroy(l);
! 184: return (EXIT_FAILURE);
! 185: }
! 186:
! 187: /* EOF */
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