Annotation of embedaddon/libnet/sample/cdp.c, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * $Id: cdp.c,v 1.3 2004/11/09 07:05:07 mike Exp $
1.1 misho 3: *
1.1.1.2 ! misho 4: * cdppoke
! 5: * CDP information injection tool
! 6: * Released as part of the MXFP Layer 2 Toolkit
! 7: * http://www.packetfactory.net/MXFP
! 8: *
! 9: * Copyright (c) 2004 Mike D. Schiffman <mike@infonexus.com>
! 10: * Copyright (c) 2004 Jeremy Rauch <jrauch@cadre.org>
1.1 misho 11: *
12: * All rights reserved.
13: *
14: * Redistribution and use in source and binary forms, with or without
15: * modification, are permitted provided that the following conditions
16: * are met:
17: * 1. Redistributions of source code must retain the above copyright
18: * notice, this list of conditions and the following disclaimer.
19: * 2. Redistributions in binary form must reproduce the above copyright
20: * notice, this list of conditions and the following disclaimer in the
21: * documentation and/or other materials provided with the distribution.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: */
36:
37: #if (HAVE_CONFIG_H)
1.1.1.2 ! misho 38: #if ((_WIN32) && !(__CYGWIN__))
! 39: #include "../include/win32/config.h"
! 40: #else
1.1 misho 41: #include "../include/config.h"
42: #endif
1.1.1.2 ! misho 43: #endif
1.1 misho 44: #include "./libnet_test.h"
45:
1.1.1.2 ! misho 46:
1.1 misho 47: int
48: main(int argc, char *argv[])
49: {
1.1.1.2 ! misho 50: int c, len, index;
1.1 misho 51: libnet_t *l;
52: libnet_ptag_t t;
53: u_char *value;
54: u_char values[100];
55: u_short tmp;
56: char errbuf[LIBNET_ERRBUF_SIZE];
1.1.1.2 ! misho 57: uint8_t oui[3] = { 0x00, 0x00, 0x0c };
! 58: uint8_t cdp_mac[6] = {0x01, 0x0, 0xc, 0xcc, 0xcc, 0xcc};
1.1 misho 59:
1.1.1.2 ! misho 60: if (argc != 3)
1.1 misho 61: {
1.1.1.2 ! misho 62: fprintf(stderr, "usage %s device device-id\n", argv[0]);
! 63: return (EXIT_FAILURE);
1.1 misho 64: }
65:
1.1.1.2 ! misho 66: fprintf(stderr, "cdppoke...\n");
1.1 misho 67:
1.1.1.2 ! misho 68: l = libnet_init(LIBNET_LINK, argv[1], errbuf);
! 69: if (l == NULL)
1.1 misho 70: {
1.1.1.2 ! misho 71: fprintf(stderr, "libnet_init() failed: %s", errbuf);
! 72: return (EXIT_FAILURE);
1.1 misho 73: }
74:
1.1.1.2 ! misho 75: /* build the TLV's by hand until we get something better */
1.1 misho 76: memset(values, 0, sizeof(values));
1.1.1.2 ! misho 77: index = 0;
! 78:
1.1 misho 79: tmp = htons(LIBNET_CDP_VERSION);
80: memcpy(values, &tmp, 2);
1.1.1.2 ! misho 81: index += 2;
! 82: tmp = htons(9); /* length of string below plus type and length fields */
! 83: memcpy(values + index, &tmp, 2);
! 84: index += 2;
! 85: memcpy(values + index, (u_char *)"1.1.1", 5);
! 86: index += 5;
! 87:
! 88: /* this TLV is handled by the libnet builder */
! 89: value = argv[2];
! 90: len = strlen(argv[2]);
! 91:
! 92: /* build CDP header */
! 93: t = libnet_build_cdp(
! 94: 1, /* version */
! 95: 30, /* time to live */
! 96: 0x0, /* checksum */
! 97: 0x1, /* type */
! 98: len, /* length */
! 99: value, /* value */
! 100: values, /* payload */
! 101: index, /* payload size */
! 102: l, /* libnet context */
! 103: 0); /* libnet ptag */
1.1 misho 104: if (t == -1)
105: {
1.1.1.2 ! misho 106: fprintf(stderr, "Can't build CDP header: %s\n", libnet_geterror(l));
1.1 misho 107: goto bad;
108: }
1.1.1.2 ! misho 109:
! 110: /* build 802.2 header */
! 111: t = libnet_build_802_2snap(
! 112: LIBNET_SAP_SNAP, /* SAP SNAP code */
! 113: LIBNET_SAP_SNAP, /* SAP SNAP code */
! 114: 0x03, /* control */
! 115: oui, /* OUI */
! 116: 0x2000, /* upper layer protocol type */
! 117: NULL, /* payload */
! 118: 0, /* payload size */
! 119: l, /* libnet context */
! 120: 0); /* libnet ptag */
1.1 misho 121: if (t == -1)
122: {
1.1.1.2 ! misho 123: fprintf(stderr, "Can't build SNAP header: %s\n", libnet_geterror(l));
1.1 misho 124: goto bad;
125: }
126:
1.1.1.2 ! misho 127: /* build 802.3 header */
! 128: t = libnet_build_802_3(
! 129: cdp_mac, /* ethernet destination */
! 130: (uint8_t *)libnet_get_hwaddr(l), /* ethernet source */
! 131: LIBNET_802_2_H + LIBNET_802_2SNAP_H + LIBNET_CDP_H, /* packet len */
! 132: NULL, /* payload */
! 133: 0, /* payload size */
! 134: l, /* libnet context */
! 135: 0); /* libnet ptag */
1.1 misho 136: if (t == -1)
137: {
1.1.1.2 ! misho 138: fprintf(stderr, "Can't build 802.3 header: %s\n", libnet_geterror(l));
1.1 misho 139: goto bad;
140: }
141:
1.1.1.2 ! misho 142: /* write the packet out */
1.1 misho 143: c = libnet_write(l);
144: if (c == -1)
145: {
146: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
147: goto bad;
148: }
149: else
150: {
1.1.1.2 ! misho 151: fprintf(stderr, "Wrote %d byte CDP frame \"%s\"\n", c, argv[2]);
1.1 misho 152: }
153: libnet_destroy(l);
154: return (EXIT_SUCCESS);
155: bad:
156: libnet_destroy(l);
157: return (EXIT_FAILURE);
158: }
159:
160: /* EOF */
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