diff options
Diffstat (limited to 'libnet/sample/cdp.c')
| -rw-r--r-- | libnet/sample/cdp.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/libnet/sample/cdp.c b/libnet/sample/cdp.c new file mode 100644 index 0000000..d96c950 --- /dev/null +++ b/libnet/sample/cdp.c @@ -0,0 +1,160 @@ +/* + * $Id: cdp.c,v 1.3 2004/11/09 07:05:07 mike Exp $ + * + * cdppoke + * CDP information injection tool + * Released as part of the MXFP Layer 2 Toolkit + * http://www.packetfactory.net/MXFP + * + * Copyright (c) 2004 Mike D. Schiffman <mike@infonexus.com> + * Copyright (c) 2004 Jeremy Rauch <jrauch@cadre.org> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#if (HAVE_CONFIG_H) +#if ((_WIN32) && !(__CYGWIN__)) +#include "../include/win32/config.h" +#else +#include "../include/config.h" +#endif +#endif +#include "./libnet_test.h" + + +int +main(int argc, char *argv[]) +{ + int c, len, index; + libnet_t *l; + libnet_ptag_t t; + u_char *value; + u_char values[100]; + u_short tmp; + char errbuf[LIBNET_ERRBUF_SIZE]; + u_int8_t oui[3] = { 0x00, 0x00, 0x0c }; + u_int8_t cdp_mac[6] = {0x01, 0x0, 0xc, 0xcc, 0xcc, 0xcc}; + + if (argc != 3) + { + fprintf(stderr, "usage %s device device-id\n", argv[0]); + return (EXIT_FAILURE); + } + + fprintf(stderr, "cdppoke...\n"); + + l = libnet_init(LIBNET_LINK, argv[1], errbuf); + if (l == NULL) + { + fprintf(stderr, "libnet_init() failed: %s", errbuf); + return (EXIT_FAILURE); + } + + /* build the TLV's by hand until we get something better */ + memset(values, 0, sizeof(values)); + index = 0; + + tmp = htons(LIBNET_CDP_VERSION); + memcpy(values, &tmp, 2); + index += 2; + tmp = htons(9); /* length of string below plus type and length fields */ + memcpy(values + index, &tmp, 2); + index += 2; + memcpy(values + index, (u_char *)"1.1.1", 5); + index += 5; + + /* this TLV is handled by the libnet builder */ + value = argv[2]; + len = strlen(argv[2]); + + /* build CDP header */ + t = libnet_build_cdp( + 1, /* version */ + 30, /* time to live */ + 0x0, /* checksum */ + 0x1, /* type */ + len, /* length */ + value, /* value */ + values, /* payload */ + index, /* payload size */ + l, /* libnet context */ + 0); /* libnet ptag */ + if (t == -1) + { + fprintf(stderr, "Can't build CDP header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* build 802.2 header */ + t = libnet_build_802_2snap( + LIBNET_SAP_SNAP, /* SAP SNAP code */ + LIBNET_SAP_SNAP, /* SAP SNAP code */ + 0x03, /* control */ + oui, /* OUI */ + 0x2000, /* upper layer protocol type */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet context */ + 0); /* libnet ptag */ + if (t == -1) + { + fprintf(stderr, "Can't build SNAP header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* build 802.3 header */ + t = libnet_build_802_3( + cdp_mac, /* ethernet destination */ + (u_int8_t *)libnet_get_hwaddr(l), /* ethernet source */ + LIBNET_802_2_H + LIBNET_802_2SNAP_H + LIBNET_CDP_H, /* packet len */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet context */ + 0); /* libnet ptag */ + if (t == -1) + { + fprintf(stderr, "Can't build 802.3 header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* write the packet out */ + c = libnet_write(l); + if (c == -1) + { + fprintf(stderr, "Write error: %s\n", libnet_geterror(l)); + goto bad; + } + else + { + fprintf(stderr, "Wrote %d byte CDP frame \"%s\"\n", c, argv[2]); + } + libnet_destroy(l); + return (EXIT_SUCCESS); +bad: + libnet_destroy(l); + return (EXIT_FAILURE); +} + +/* EOF */ |