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1.1 misho 1: /*
2: * $Id: ospf_lsa.c,v 1.2 2004/01/03 20:31:01 mike Exp $
3: *
4: * libnet 1.1
5: * Build an OSPF LSA packet
6: *
7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8: * All rights reserved.
9: *
10: * Copyright (c) 1999, 2000 Andrew Reiter <areiter@bindview.com>
11: * All rights reserved.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
34: */
35:
36: #if (HAVE_CONFIG_H)
37: #include "../include/config.h"
38: #endif
39: #include "./libnet_test.h"
40:
41:
42: int
43: main(int argc, char **argv)
44: {
45: int c;
46: libnet_t *l;
47: libnet_ptag_t t;
48: u_long src, dst;
49: u_char auth[8] = {0,0,0,0,0,0,0,0};
50: char *from, *to, errbuf[LIBNET_ERRBUF_SIZE];
51:
52: printf("libnet 1.1 OSPF LSA packet shaping[raw]\n");
53:
54: if (argc != 3)
55: {
56: usage(argv[0]);
57: }
58:
59: from = argv[1];
60: to = argv[2];
61:
62: /*
63: * Initialize the library. Root priviledges are required.
64: */
65: l = libnet_init(
66: LIBNET_RAW4, /* injection type */
67: NULL, /* network interface */
68: errbuf); /* errbuf */
69:
70: if (l == NULL)
71: {
72: fprintf(stderr, "libnet_init() failed: %s", errbuf);
73: exit(EXIT_FAILURE);
74: }
75:
76: /* Too lazy to check for error */
77: src = libnet_name2addr4(l, from, LIBNET_DONT_RESOLVE);
78: dst = libnet_name2addr4(l, to, LIBNET_DONT_RESOLVE);
79:
80: t = libnet_build_ospfv2_lsa_net(
81: 0xffffff00, /* netmask */
82: 0xc0ffee00, /* router id */
83: NULL, /* payload */
84: 0, /* payload size */
85: l, /* libnet handle */
86: 0); /* libnet id */
87: if (t == -1)
88: {
89: fprintf(stderr, "Can't build LSA net header: %s\n", libnet_geterror(l));
90: goto bad;
91: }
92:
93: t = libnet_build_ospfv2_lsa(
94: 40, /* packet age */
95: 0, /* options */
96: LIBNET_LS_TYPE_NET, /* type */
97: htonl(0xc0ffee00), /* LS id */
98: src, /* ad router */
99: 0x11111111, /* seq */
100: 0xffff, /* checksum */
101: LIBNET_OSPF_LS_NET_H + LIBNET_OSPF_LSA_H, /* packet length */
102: NULL, /* payload */
103: 0, /* payload size */
104: l, /* libnet handle */
105: 0); /* libnet id */
106: if (t == -1)
107: {
108: fprintf(stderr, "Can't build LSA header: %s\n", libnet_geterror(l));
109: goto bad;
110: }
111:
112: /* authentication data */
113: t = libnet_build_data(
114: auth, /* auth data */
115: LIBNET_OSPF_AUTH_H, /* payload size */
116: l, /* libnet handle */
117: 0); /* libnet id */
118: if (t == -1)
119: {
120: fprintf(stderr, "Can't build OSPF AUTH header: %s\n", libnet_geterror(l));
121: goto bad;
122: }
123:
124: t = libnet_build_ospfv2(
125: LIBNET_OSPF_LSA_H + LIBNET_OSPF_AUTH_H +
126: LIBNET_OSPF_LS_NET_H, /* OSPF packet length */
127: LIBNET_OSPF_LSA, /* OSPF packet type */
128: htonl(0xd000000d), /* router id */
129: htonl(0xc0ffee00), /* area id */
130: 0, /* checksum */
131: LIBNET_OSPF_AUTH_NULL, /* auth type */
132: NULL, /* payload */
133: 0, /* payload size */
134: l, /* libnet handle */
135: 0); /* libnet id */
136: if (t == -1)
137: {
138: fprintf(stderr, "Can't build OSPF header: %s\n", libnet_geterror(l));
139: goto bad;
140: }
141:
142: t = libnet_build_ipv4(
143: LIBNET_IPV4_H + LIBNET_OSPF_H + LIBNET_OSPF_AUTH_H +
144: LIBNET_OSPF_LSA_H + LIBNET_OSPF_LS_NET_H, /* packet total length */
145: 0, /* TOS */
146: 101, /* IP iD */
147: IP_DF, /* IP frag */
148: 254, /* TTL */
149: IPPROTO_OSPF, /* protocol */
150: 0, /* checksum */
151: src, /* source IP */
152: dst, /* destination IP */
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 IP 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 OSPF packet; check the wire.\n",
175: c);
176: }
177: libnet_destroy(l);
178: return (EXIT_SUCCESS);
179: bad:
180: libnet_destroy(l);
181: return (EXIT_FAILURE);
182: }
183:
184:
185: void
186: usage(char *pname)
187: {
188: printf("Usage: %s <source ip> <dest. ip>\n", pname);
189: exit(0);
190: }