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1.1 misho 1: /*
2: * $Id: ospf_hello.c,v 1.2 2004/01/03 20:31:01 mike Exp $
3: *
4: * libnet 1.1
5: * Build an OSPF Hello 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: int
42: main(int argc, char **argv)
43: {
44: int c;
45: libnet_t *l;
46: libnet_ptag_t t;
47: u_long src, dst, nbr;
48: char errbuf[LIBNET_ERRBUF_SIZE];
49: u_char *to, *from, *neighbor;
50: u_char auth[8] = {0,0,0,0,0,0,0,0};
51:
52:
53: printf("libnet 1.1 OSPF Hello packet shaping[raw]\n");
54:
55: if (argc != 4)
56: {
57: usage(argv[0]);
58: }
59:
60: from = argv[1];
61: to = argv[2];
62: neighbor = argv[3];
63:
64: /*
65: * Initialize the library. Root priviledges are required.
66: */
67: l = libnet_init(
68: LIBNET_RAW4, /* injection type */
69: NULL, /* network interface */
70: errbuf); /* errbuf */
71:
72: if (l == NULL)
73: {
74: fprintf(stderr, "libnet_init() failed: %s", errbuf);
75: exit(EXIT_FAILURE);
76: }
77:
78: /* Too lazy to check for error */
79: src = libnet_name2addr4(l, from, LIBNET_DONT_RESOLVE);
80: dst = libnet_name2addr4(l, to, LIBNET_DONT_RESOLVE);
81: nbr = libnet_name2addr4(l, neighbor, LIBNET_DONT_RESOLVE);
82:
83: t = libnet_build_ospfv2_hello(
84: 0xffffffff, /* netmask */
85: 2, /* interval */
86: 0x00, /* options */
87: 0x00, /* priority */
88: 30, /* dead int */
89: src, /* router */
90: src, /* router */
91: nbr, /* neighbor */
92: NULL, /* payload */
93: 0, /* payload size */
94: l, /* libnet handle */
95: 0); /* libnet id */
96: if (t == -1)
97: {
98: fprintf(stderr, "Can't build OSPF HELLO header: %s\n", libnet_geterror(l));
99: goto bad;
100: }
101:
102: /* authentication data */
103: t = libnet_build_data(
104: auth, /* auth data */
105: LIBNET_OSPF_AUTH_H, /* payload size */
106: l, /* libnet handle */
107: 0); /* libnet id */
108: if (t == -1)
109: {
110: fprintf(stderr, "Can't build OSPF auth header: %s\n", libnet_geterror(l));
111: goto bad;
112: }
113:
114: t = libnet_build_ospfv2(
115: LIBNET_OSPF_HELLO_H + LIBNET_OSPF_AUTH_H, /* OSPF packet length */
116: LIBNET_OSPF_HELLO, /* OSPF packet type */
117: htonl(0xd000000d), /* router id */
118: htonl(0xc0ffee00), /* area id */
119: 0, /* checksum */
120: LIBNET_OSPF_AUTH_NULL, /* auth type */
121: NULL, /* payload */
122: 0, /* payload size */
123: l, /* libnet handle */
124: 0); /* libnet id */
125:
126: if (t == -1)
127: {
128: fprintf(stderr, "Can't build OSPF header: %s\n", libnet_geterror(l));
129: goto bad;
130: }
131:
132: t = libnet_build_ipv4(
133: LIBNET_IPV4_H + LIBNET_OSPF_H +
134: LIBNET_OSPF_HELLO_H + LIBNET_OSPF_AUTH_H, /* packet total legnth */
135: 0, /* TOS */
136: 101, /* IP iD */
137: IP_DF, /* IP frag */
138: 254, /* TTL */
139: IPPROTO_OSPF, /* protocol */
140: 0, /* checksum */
141: src, /* source IP */
142: dst, /* destination IP */
143: NULL, /* payload */
144: 0, /* payload size */
145: l, /* libnet handle */
146: 0); /* libnet id */
147: if (t == -1)
148: {
149: fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
150: goto bad;
151: }
152:
153: /*
154: * Write it to the wire.
155: */
156: c = libnet_write(l);
157: if (c == -1)
158: {
159: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
160: goto bad;
161: }
162: else
163: {
164: fprintf(stderr, "Wrote %d byte OSPF packet; check the wire.\n", c);
165: }
166: libnet_destroy(l);
167: return (EXIT_SUCCESS);
168: bad:
169: libnet_destroy(l);
170: return (EXIT_FAILURE);
171: }
172:
173:
174: void
175: usage(char *pname)
176: {
177: printf("Usage: %s <source ip> <dest. ip> <neighbor>\n", pname);
178: exit(EXIT_SUCCESS);
179: }