Annotation of embedaddon/libnet/sample/cdp.c, revision 1.1.1.3
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)
38: #include "../include/config.h"
39: #endif
40: #include "./libnet_test.h"
41:
1.1.1.2 misho 42:
1.1 misho 43: int
44: main(int argc, char *argv[])
45: {
1.1.1.2 misho 46: int c, len, index;
1.1 misho 47: libnet_t *l;
48: libnet_ptag_t t;
49: u_char *value;
50: u_char values[100];
51: u_short tmp;
52: char errbuf[LIBNET_ERRBUF_SIZE];
1.1.1.2 misho 53: uint8_t oui[3] = { 0x00, 0x00, 0x0c };
54: uint8_t cdp_mac[6] = {0x01, 0x0, 0xc, 0xcc, 0xcc, 0xcc};
1.1 misho 55:
1.1.1.2 misho 56: if (argc != 3)
1.1 misho 57: {
1.1.1.2 misho 58: fprintf(stderr, "usage %s device device-id\n", argv[0]);
59: return (EXIT_FAILURE);
1.1 misho 60: }
61:
1.1.1.2 misho 62: fprintf(stderr, "cdppoke...\n");
1.1 misho 63:
1.1.1.2 misho 64: l = libnet_init(LIBNET_LINK, argv[1], errbuf);
65: if (l == NULL)
1.1 misho 66: {
1.1.1.2 misho 67: fprintf(stderr, "libnet_init() failed: %s", errbuf);
68: return (EXIT_FAILURE);
1.1 misho 69: }
70:
1.1.1.2 misho 71: /* build the TLV's by hand until we get something better */
1.1 misho 72: memset(values, 0, sizeof(values));
1.1.1.2 misho 73: index = 0;
74:
1.1 misho 75: tmp = htons(LIBNET_CDP_VERSION);
76: memcpy(values, &tmp, 2);
1.1.1.2 misho 77: index += 2;
78: tmp = htons(9); /* length of string below plus type and length fields */
79: memcpy(values + index, &tmp, 2);
80: index += 2;
81: memcpy(values + index, (u_char *)"1.1.1", 5);
82: index += 5;
83:
84: /* this TLV is handled by the libnet builder */
1.1.1.3 ! misho 85: value = (u_char *)argv[2];
1.1.1.2 misho 86: len = strlen(argv[2]);
87:
88: /* build CDP header */
89: t = libnet_build_cdp(
90: 1, /* version */
91: 30, /* time to live */
92: 0x0, /* checksum */
93: 0x1, /* type */
94: len, /* length */
95: value, /* value */
96: values, /* payload */
97: index, /* payload size */
98: l, /* libnet context */
99: 0); /* libnet ptag */
1.1 misho 100: if (t == -1)
101: {
1.1.1.2 misho 102: fprintf(stderr, "Can't build CDP header: %s\n", libnet_geterror(l));
1.1 misho 103: goto bad;
104: }
1.1.1.2 misho 105:
106: /* build 802.2 header */
107: t = libnet_build_802_2snap(
108: LIBNET_SAP_SNAP, /* SAP SNAP code */
109: LIBNET_SAP_SNAP, /* SAP SNAP code */
110: 0x03, /* control */
111: oui, /* OUI */
112: 0x2000, /* upper layer protocol type */
113: NULL, /* payload */
114: 0, /* payload size */
115: l, /* libnet context */
116: 0); /* libnet ptag */
1.1 misho 117: if (t == -1)
118: {
1.1.1.2 misho 119: fprintf(stderr, "Can't build SNAP header: %s\n", libnet_geterror(l));
1.1 misho 120: goto bad;
121: }
122:
1.1.1.2 misho 123: /* build 802.3 header */
124: t = libnet_build_802_3(
125: cdp_mac, /* ethernet destination */
126: (uint8_t *)libnet_get_hwaddr(l), /* ethernet source */
127: LIBNET_802_2_H + LIBNET_802_2SNAP_H + LIBNET_CDP_H, /* packet len */
128: NULL, /* payload */
129: 0, /* payload size */
130: l, /* libnet context */
131: 0); /* libnet ptag */
1.1 misho 132: if (t == -1)
133: {
1.1.1.2 misho 134: fprintf(stderr, "Can't build 802.3 header: %s\n", libnet_geterror(l));
1.1 misho 135: goto bad;
136: }
137:
1.1.1.2 misho 138: /* write the packet out */
1.1 misho 139: c = libnet_write(l);
140: if (c == -1)
141: {
142: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
143: goto bad;
144: }
145: else
146: {
1.1.1.2 misho 147: fprintf(stderr, "Wrote %d byte CDP frame \"%s\"\n", c, argv[2]);
1.1 misho 148: }
149: libnet_destroy(l);
150: return (EXIT_SUCCESS);
151: bad:
152: libnet_destroy(l);
153: return (EXIT_FAILURE);
154: }
155:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to cdp.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libnet / sample