diff options
Diffstat (limited to 'libnet/sample/cdp.c')
| -rw-r--r-- | libnet/sample/cdp.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/libnet/sample/cdp.c b/libnet/sample/cdp.c new file mode 100644 index 0000000..6ebe04f --- /dev/null +++ b/libnet/sample/cdp.c @@ -0,0 +1,187 @@ +/* + * $Id: cdp.c,v 1.2 2004/01/03 20:31:01 mike Exp $ + * + * libnet 1.1 + * Build an CDP packet + * + * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com> + * 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) +#include "../include/config.h" +#endif +#include "./libnet_test.h" + +int +main(int argc, char *argv[]) +{ + int c, len; + libnet_t *l; + libnet_ptag_t t; + u_char *value; + u_char values[100]; + u_short tmp; + u_long tmp2; + char *device = NULL; + char errbuf[LIBNET_ERRBUF_SIZE]; + + printf("libnet 1.1 packet shaping: CDP[link]\n"); + /* + * Initialize the library. Root priviledges are required. + */ + l = libnet_init( + LIBNET_LINK, /* injection type */ + device, /* network interface */ + errbuf); /* errbuf */ + + if (l == NULL) + { + fprintf(stderr, "libnet_init() failed: %s", errbuf); + exit(EXIT_FAILURE); + } + + value = "switch"; + len = strlen(value); + + t = libnet_build_cdp( + 1, /* version */ + 30, /* time to live */ + 0, /* checksum */ + LIBNET_CDP_DEVID, /* type */ + len, /* length */ + value, /* value */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet handle */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build CDP header: %s\n", libnet_geterror(l)); + goto bad; + } + + memset(values, 0, sizeof(values)); + tmp = htons(LIBNET_CDP_PORTID); + memcpy(values, &tmp, 2); + tmp = htons(0x0014); + memcpy(values + 2, &tmp, 2); + memcpy(values + 4, (u_char *)"FastEthernet0/20", 16); + t = libnet_build_data( + values, + 20, + l, + 0); + if (t == -1) + { + fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l)); + goto bad; + } + memset(values, 0, sizeof(values)); + tmp = htons(LIBNET_CDP_CAPABIL); + memcpy(values, &tmp, 2); + tmp = htons(0x0008); + memcpy(values + 2, &tmp, 2); + tmp2 = htonl((LIBNET_CDP_CAP_L2S | LIBNET_CDP_CAP_L2B)); + memcpy(values + 4, &tmp2, 4); + t = libnet_build_data( + values, + 8, + l, + 0); + if (t == -1) + { + fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l)); + goto bad; + } + memset(values, 0, sizeof(values)); + tmp = htons(LIBNET_CDP_VERSION); + memcpy(values, &tmp, 2); + tmp = htons(0x001f); + memcpy(values + 2, &tmp, 2); + memcpy(values + 4, (u_char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26); + t = libnet_build_data( + values, + 31, + l, + 0); + if (t == -1) + { + fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l)); + goto bad; + } + memset(values, 0, sizeof(values)); + tmp = htons(LIBNET_CDP_PLATFORM); + memcpy(values, &tmp, 2); + tmp = htons(0x0015); + memcpy(values + 2, &tmp, 2); + memcpy(values + 4, (u_char *)"cisco WS-C2924-XL", 17); + t = libnet_build_data( + values, + 21, + l, + 0); + if (t == -1) + { + fprintf(stderr, "Can't build CDP data: %s\n", libnet_geterror(l)); + goto bad; + } + + t = libnet_build_ethernet( + enet_dst, /* ethernet destination */ + enet_src, /* ethernet source */ + 0x2000, /* protocol type */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet handle */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build ethernet header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* + * Write it to the wire. + */ + 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 packet; check the wire.\n", c); + } + libnet_destroy(l); + return (EXIT_SUCCESS); +bad: + libnet_destroy(l); + return (EXIT_FAILURE); +} + +/* EOF */ |