diff options
Diffstat (limited to 'sample/arp.c')
| -rw-r--r-- | sample/arp.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/sample/arp.c b/sample/arp.c new file mode 100644 index 0000000..32c5532 --- /dev/null +++ b/sample/arp.c @@ -0,0 +1,136 @@ +/* + * $Id: arp.c,v 1.7 2004/11/09 07:05:07 mike Exp $ + * + * libnet 1.1 + * Build an ARP 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) +#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; + uint32_t i; + libnet_t *l; + libnet_ptag_t t; + char *device = NULL; + uint8_t *packet; + uint32_t packet_s; + char errbuf[LIBNET_ERRBUF_SIZE]; + + printf("libnet 1.1 packet shaping: ARP[link -- autobuilding ethernet]\n"); + + if (argc > 1) + { + device = argv[1]; + } + + l = libnet_init( + LIBNET_LINK_ADV, /* injection type */ + device, /* network interface */ + errbuf); /* errbuf */ + + if (l == NULL) + { + fprintf(stderr, "%s", errbuf); + exit(EXIT_FAILURE); + } + else + + i = libnet_get_ipaddr4(l); + + t = libnet_build_arp( + ARPHRD_ETHER, /* hardware addr */ + ETHERTYPE_IP, /* protocol addr */ + 6, /* hardware addr size */ + 4, /* protocol addr size */ + ARPOP_REPLY, /* operation type */ + enet_src, /* sender hardware addr */ + (uint8_t *)&i, /* sender protocol addr */ + enet_dst, /* target hardware addr */ + (uint8_t *)&i, /* target protocol addr */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet context */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l)); + goto bad; + } + + t = libnet_autobuild_ethernet( + enet_dst, /* ethernet destination */ + ETHERTYPE_ARP, /* protocol type */ + l); /* libnet handle */ + if (t == -1) + { + fprintf(stderr, "Can't build ethernet header: %s\n", + libnet_geterror(l)); + goto bad; + } + + + if (libnet_adv_cull_packet(l, &packet, &packet_s) == -1) + { + fprintf(stderr, "%s", libnet_geterror(l)); + } + else + { + fprintf(stderr, "packet size: %d\n", packet_s); + libnet_adv_free_packet(l, packet); + } + + c = libnet_write(l); + + if (c == -1) + { + fprintf(stderr, "Write error: %s\n", libnet_geterror(l)); + goto bad; + } + else + { + fprintf(stderr, "Wrote %d byte ARP packet from context \"%s\"; " + "check the wire.\n", c, libnet_cq_getlabel(l)); + } + libnet_destroy(l); + return (EXIT_SUCCESS); +bad: + libnet_destroy(l); + return (EXIT_FAILURE); +} + +/* EOF */ |