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1.1 misho 1: /*
2: * $Id: icmp_timestamp.c,v 1.2 2004/01/03 20:31:01 mike Exp $
3: *
4: * libnet 1.1
5: * Build an ICMP_TSTAMP 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: #include "../include/config.h"
35: #endif
36: #include "./libnet_test.h"
37:
38: int
39: main(int argc, char **argv)
40: {
41: int c;
42: libnet_t *l;
43: libnet_ptag_t t;
44: u_long src_ip, dst_ip;
45: char errbuf[LIBNET_ERRBUF_SIZE];
46:
47: printf("libnet 1.1 packet shaping: ICMP timestamp[raw]\n");
48:
49: /*
50: * Initialize the library. Root priviledges are required.
51: */
52: l = libnet_init(
53: LIBNET_RAW4, /* injection type */
54: NULL, /* network interface */
55: errbuf); /* errbuf */
56:
57: if (l == NULL)
58: {
59: fprintf(stderr, "libnet_init() failed: %s", errbuf);
60: exit(EXIT_FAILURE);
61: }
62:
63: src_ip = 0;
64: dst_ip = 0;
65: while((c = getopt(argc, argv, "d:s:")) != EOF)
66: {
67: switch (c)
68: {
69: case 'd':
70: if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
71: {
72: fprintf(stderr, "Bad destination IP address: %s\n", optarg);
73: exit(1);
74: }
75: break;
76: case 's':
77: if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
78: {
79: fprintf(stderr, "Bad source IP address: %s\n", optarg);
80: exit(1);
81: }
82: break;
83: }
84: }
85: if (!src_ip || !dst_ip)
86: {
87: usage(argv[0]);
88: exit(EXIT_FAILURE);
89: }
90:
91: t = libnet_build_icmpv4_timestamp(
92: ICMP_TSTAMP, /* type */
93: 0, /* code */
94: 0, /* checksum */
95: 242, /* id */
96: 424, /* sequence number */
97: 1000, /* otime */
98: 2000, /* rtime */
99: 3000, /* ttime */
100: NULL, /* payload */
101: 0, /* payload size */
102: l, /* libnet handle */
103: 0);
104: if (t == -1)
105: {
106: fprintf(stderr, "Can't build ICMP header: %s\n", libnet_geterror(l));
107: goto bad;
108: }
109:
110: t = libnet_build_ipv4(
111: LIBNET_IPV4_H + LIBNET_ICMPV4_TS_H, /* length */
112: 0, /* TOS */
113: 242, /* IP ID */
114: 0, /* IP Frag */
115: 64, /* TTL */
116: IPPROTO_ICMP, /* protocol */
117: 0, /* checksum */
118: src_ip, /* source IP */
119: dst_ip, /* destination IP */
120: NULL, /* payload */
121: 0, /* payload size */
122: l, /* libnet handle */
123: 0);
124: if (t == -1)
125: {
126: fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
127: goto bad;
128: }
129:
130: /*
131: * Write it to the wire.
132: */
133: c = libnet_write(l);
134: if (c == -1)
135: {
136: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
137: goto bad;
138: }
139: else
140: {
141: fprintf(stderr, "Wrote %d byte ICMP packet; check the wire.\n", c);
142: }
143: libnet_destroy(l);
144: return (EXIT_SUCCESS);
145: bad:
146: libnet_destroy(l);
147: return (EXIT_FAILURE);
148: }
149:
150:
151: void
152: usage(char *name)
153: {
154: fprintf(stderr, "usage: %s -s source_ip -d destination_ip\n ", name);
155: }
156: