2 * $Id: libnet-example-3.c,v 1.1.1.1 2000/05/25 00:28:49 route Exp $
5 * example 2: raw socket api / ICMP_ECHO packet(s) using an arena
7 * Copyright (c) 1998 - 2001 Mike D. Schiffman <mike@infonexus.com>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
39 main(int argc, char **argv)
41 int network, n, c, number_of_packets, packet_size;
42 struct libnet_arena arena, *arena_p;
44 u_long src_ip, dst_ip;
46 printf("libnet example code:\tmodule 3\n\n");
47 printf("packet injection interface:\tlink layer\n");
48 printf("packet type:\t\t\tICMP_ECHO [no payload] using an arena\n");
52 while((c = getopt(argc, argv, "d:s:")) != EOF)
57 if (!(dst_ip = libnet_name_resolve(optarg, LIBNET_RESOLVE)))
59 libnet_error(LIBNET_ERR_FATAL, "Bad destination IP address: %s\n", optarg);
63 if (!(src_ip = libnet_name_resolve(optarg, LIBNET_RESOLVE)))
65 libnet_error(LIBNET_ERR_FATAL, "Bad source IP address: %s\n", optarg);
70 if (!src_ip || !dst_ip)
77 * We're just going to build an ICMP packet with no payload using the
78 * raw sockets API, so we only need memory for a ICMP header and an IP
81 packet_size = LIBNET_IP_H + LIBNET_ICMP_ECHO_H;
84 * Let's just build say, 10 packets.
86 number_of_packets = 10;
89 if (libnet_init_packet_arena(&arena_p, number_of_packets, packet_size) == -1)
91 libnet_error(LIBNET_ERR_FATAL, "libnet_init_packet_arena failed\n");
95 printf("Allocated an arena of %ld bytes..\n", LIBNET_GET_ARENA_SIZE(arena));
98 network = libnet_open_raw_sock(IPPROTO_RAW);
101 libnet_error(LIBNET_ERR_FATAL, "Can't open the network.\n");
104 for (n = 0; n < number_of_packets; n++)
106 printf("%ld bytes remaining in arena\n", LIBNET_GET_ARENA_REMAINING_BYTES(arena));
107 packets[n] = libnet_next_packet_from_arena(&arena_p, packet_size);
110 libnet_error(LIBNET_ERR_WARNING, "Arena is empty\n");
114 libnet_build_ip(ICMP_ECHO_H, /* Size of the payload */
115 IPTOS_LOWDELAY | IPTOS_THROUGHPUT, /* IP tos */
119 IPPROTO_ICMP, /* transport protocol */
120 src_ip, /* source IP */
121 dst_ip, /* destination IP */
122 NULL, /* pointer to payload */
123 0, /* payload length */
124 packets[n]); /* packet header memory */
126 libnet_build_icmp_echo(ICMP_ECHO, /* type */
130 NULL, /* pointer to payload */
131 0, /* payload length */
132 packets[n] + LIBNET_IP_H); /* packet header memory */
134 if (libnet_do_checksum(packets[n], IPPROTO_ICMP, LIBNET_ICMP_ECHO_H) == -1)
136 libnet_error(LIBNET_ERR_FATAL, "libnet_do_checksum failed\n");
139 c = libnet_write_ip(network, packets[n], packet_size);
142 libnet_error(LN_ERR_WARNING, "libnet_write_ip only wrote %d bytes\n", c);
146 printf("construction and injection of packet %d of %d completed, wrote all %d bytes\n", n + 1, number_of_packets, c);
150 libnet_destroy_packet_arena(&arena_p);
151 return (c == -1 ? EXIT_FAILURE : EXIT_SUCCESS);
158 fprintf(stderr, "usage: %s -s source_ip -d destination_ip\n ", name);