1/*	$FreeBSD$	*/
2
3/*
4 * Copyright (C) 2000-2002 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id: addipopt.c,v 1.7.4.1 2006/06/16 17:20:56 darrenr Exp $
9 */
10
11#include "ipf.h"
12
13
14int addipopt(op, io, len, class)
15char *op;
16struct ipopt_names *io;
17int len;
18char *class;
19{
20	int olen = len;
21	struct in_addr ipadr;
22	u_short val;
23	u_char lvl;
24	char *s;
25
26	if ((len + io->on_siz) > 48) {
27		fprintf(stderr, "options too long\n");
28		return 0;
29	}
30	len += io->on_siz;
31	*op++ = io->on_value;
32	if (io->on_siz > 1) {
33		s = op;
34		*op++ = io->on_siz;
35		*op++ = IPOPT_MINOFF;
36
37		if (class) {
38			switch (io->on_value)
39			{
40			case IPOPT_SECURITY :
41				lvl = seclevel(class);
42				*(op - 1) = lvl;
43				break;
44			case IPOPT_LSRR :
45			case IPOPT_SSRR :
46				ipadr.s_addr = inet_addr(class);
47				s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
48				bcopy((char *)&ipadr, op, sizeof(ipadr));
49				break;
50			case IPOPT_SATID :
51				val = atoi(class);
52				bcopy((char *)&val, op, 2);
53				break;
54			}
55		}
56
57		op += io->on_siz - 3;
58		if (len & 3) {
59			*op++ = IPOPT_NOP;
60			len++;
61		}
62	}
63	if (opts & OPT_DEBUG)
64		fprintf(stderr, "bo: %s %d %#x: %d\n",
65			io->on_name, io->on_value, io->on_bit, len);
66	return len - olen;
67}
68