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1.1 misho 1: /*
2: * $Id: icmp_timeexceed.c,v 1.3 2004/03/16 18:40:58 mike Exp $
3: *
4: * libnet 1.1
5: * Build an ICMP timeexceed packet
6: *
7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
1.1.1.2 misho 8: * Copyright (c) 2003 Frédéric Raynal <pappy@security-labs.org>
1.1 misho 9: * All rights reserved.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: */
33:
34: #if (HAVE_CONFIG_H)
35: #include "../include/config.h"
36: #endif
37: #include "./libnet_test.h"
38:
39: int
40: main(int argc, char **argv)
41: {
42: int c;
43: libnet_t *l;
44: libnet_ptag_t t;
45: u_long src_ip, dst_ip;
46: u_char payload[8] = {0x11, 0x11, 0x22, 0x22, 0x00, 0x08, 0xc6, 0xa5};
47: u_long payload_s = 8;
48: char errbuf[LIBNET_ERRBUF_SIZE];
49:
50: printf("libnet 1.1 packet shaping: ICMP timeexceed[link]\n");
51:
52: /*
53: * Initialize the library. Root priviledges are required.
54: */
55: l = libnet_init(
56: LIBNET_LINK, /* injection type */
57: NULL, /* network interface */
58: errbuf); /* errbuf */
59:
60: if (l == NULL)
61: {
62: fprintf(stderr, "libnet_init() failed: %s", errbuf);
63: exit(EXIT_FAILURE);
64: }
65:
66: src_ip = 0;
67: dst_ip = 0;
68: while((c = getopt(argc, argv, "d:s:")) != EOF)
69: {
70: switch (c)
71: {
72: case 'd':
73: if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
74: {
75: fprintf(stderr, "Bad destination IP address: %s\n", optarg);
76: exit(1);
77: }
78: break;
79: case 's':
80: if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
81: {
82: fprintf(stderr, "Bad source IP address: %s\n", optarg);
83: exit(1);
84: }
85: break;
86: }
87: }
88: if (!src_ip || !dst_ip)
89: {
90: usage(argv[0]);
91: exit(EXIT_FAILURE);
92: }
93: t = libnet_build_ipv4(
94: LIBNET_IPV4_H + payload_s, /* length */
95: IPTOS_LOWDELAY | IPTOS_THROUGHPUT, /* TOS */
96: 0xee, /* IP ID */
97: 0, /* IP Frag */
98: 64, /* TTL */
99: IPPROTO_UDP, /* protocol */
100: 0, /* checksum */
101: dst_ip, /* source IP */
102: src_ip, /* destination IP */
103: payload, /* payload */
104: payload_s, /* payload size */
105: l, /* libnet handle */
106: 0);
107: if (t == -1)
108: {
109: fprintf(stderr, "Can't build error IP header: %s\n",
110: libnet_geterror(l));
111: goto bad;
112: }
113:
114: t = libnet_build_icmpv4_timeexceed(
115: ICMP_TIMXCEED, /* type */
116: ICMP_TIMXCEED_INTRANS, /* code */
117: 0, /* checksum */
118: NULL,
119: 0,
120: l, /* libnet handle */
121: 0);
122: if (t == -1)
123: {
124: fprintf(stderr, "Can't build ICMP header: %s\n", libnet_geterror(l));
125: goto bad;
126: }
127:
128: t = libnet_build_ipv4(
129: LIBNET_IPV4_H + LIBNET_ICMPV4_TIMXCEED_H +
130: LIBNET_IPV4_H + payload_s, /* length */
131: IPTOS_LOWDELAY | IPTOS_THROUGHPUT, /* TOS */
132: 0xee, /* IP ID */
133: 0, /* IP Frag */
134: 64, /* TTL */
135: IPPROTO_ICMP, /* protocol */
136: 0, /* checksum */
137: src_ip, /* source IP */
138: dst_ip, /* destination IP */
139: NULL, /* payload */
140: 0, /* payload size */
141: l, /* libnet handle */
142: 0);
143: if (t == -1)
144: {
145: fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
146: goto bad;
147: }
148:
149: t = libnet_build_ethernet(
150: enet_dst, /* ethernet destination */
151: enet_src, /* ethernet source */
152: ETHERTYPE_IP, /* protocol type */
153: NULL, /* payload */
154: 0, /* payload size */
155: l, /* libnet handle */
156: 0); /* libnet id */
157: if (t == -1)
158: {
159: fprintf(stderr, "Can't build ethernet header: %s\n", libnet_geterror(l));
160: goto bad;
161: }
162:
163: /*
164: * Write it to the wire.
165: */
166: c = libnet_write(l);
167: if (c == -1)
168: {
169: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
170: goto bad;
171: }
172: else
173: {
174: fprintf(stderr, "Wrote %d byte ICMP packet; check the wire.\n", c);
175: }
176: libnet_destroy(l);
177: return (EXIT_SUCCESS);
178: bad:
179: libnet_destroy(l);
180: return (EXIT_FAILURE);
181: }
182:
183:
184: void
185: usage(char *name)
186: {
187: fprintf(stderr, "usage: %s -s source_ip -d destination_ip\n ", name);
188: }
189: