Annotation of embedaddon/libnet/sample/arp.c, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * $Id: arp.c,v 1.7 2004/11/09 07:05:07 mike Exp $
1.1 misho 3: *
4: * libnet 1.1
5: * Build an ARP packet
6: *
7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8: * All rights reserved.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: *
31: */
32:
33: #if (HAVE_CONFIG_H)
34: #if ((_WIN32) && !(__CYGWIN__))
35: #include "../include/win32/config.h"
36: #else
37: #include "../include/config.h"
38: #endif
39: #endif
40: #include "./libnet_test.h"
41:
42: int
43: main(int argc, char *argv[])
44: {
45: int c;
1.1.1.2 ! misho 46: uint32_t i;
1.1 misho 47: libnet_t *l;
48: libnet_ptag_t t;
49: char *device = NULL;
1.1.1.2 ! misho 50: uint8_t *packet;
! 51: uint32_t packet_s;
1.1 misho 52: char errbuf[LIBNET_ERRBUF_SIZE];
53:
54: printf("libnet 1.1 packet shaping: ARP[link -- autobuilding ethernet]\n");
55:
56: if (argc > 1)
57: {
58: device = argv[1];
59: }
60:
61: l = libnet_init(
62: LIBNET_LINK_ADV, /* injection type */
63: device, /* network interface */
64: errbuf); /* errbuf */
65:
66: if (l == NULL)
67: {
68: fprintf(stderr, "%s", errbuf);
69: exit(EXIT_FAILURE);
70: }
71: else
72:
73: i = libnet_get_ipaddr4(l);
74:
75: t = libnet_build_arp(
76: ARPHRD_ETHER, /* hardware addr */
77: ETHERTYPE_IP, /* protocol addr */
78: 6, /* hardware addr size */
79: 4, /* protocol addr size */
80: ARPOP_REPLY, /* operation type */
81: enet_src, /* sender hardware addr */
1.1.1.2 ! misho 82: (uint8_t *)&i, /* sender protocol addr */
1.1 misho 83: enet_dst, /* target hardware addr */
1.1.1.2 ! misho 84: (uint8_t *)&i, /* target protocol addr */
1.1 misho 85: NULL, /* payload */
86: 0, /* payload size */
87: l, /* libnet context */
88: 0); /* libnet id */
89: if (t == -1)
90: {
91: fprintf(stderr, "Can't build ARP header: %s\n", libnet_geterror(l));
92: goto bad;
93: }
94:
95: t = libnet_autobuild_ethernet(
96: enet_dst, /* ethernet destination */
97: ETHERTYPE_ARP, /* protocol type */
98: l); /* libnet handle */
99: if (t == -1)
100: {
101: fprintf(stderr, "Can't build ethernet header: %s\n",
102: libnet_geterror(l));
103: goto bad;
104: }
105:
106:
107: if (libnet_adv_cull_packet(l, &packet, &packet_s) == -1)
108: {
109: fprintf(stderr, "%s", libnet_geterror(l));
110: }
111: else
112: {
113: fprintf(stderr, "packet size: %d\n", packet_s);
114: libnet_adv_free_packet(l, packet);
115: }
116:
117: c = libnet_write(l);
118:
119: if (c == -1)
120: {
121: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
122: goto bad;
123: }
124: else
125: {
126: fprintf(stderr, "Wrote %d byte ARP packet from context \"%s\"; "
127: "check the wire.\n", c, libnet_cq_getlabel(l));
128: }
129: libnet_destroy(l);
130: return (EXIT_SUCCESS);
131: bad:
132: libnet_destroy(l);
133: return (EXIT_FAILURE);
134: }
135:
136: /* EOF */
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