buildopts.c revision 153881 
1/*	$FreeBSD: head/contrib/ipfilter/lib/buildopts.c 153881 2005-12-30 11:52:26Z guido $	*/
2
3/*
4 * Copyright (C) 1993-2001 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id: buildopts.c,v 1.6 2002/01/28 06:50:45 darrenr Exp $
9 */
10
11#include "ipf.h"
12
13
14u_32_t buildopts(cp, op, len)
15char *cp, *op;
16int len;
17{
18	struct ipopt_names *io;
19	u_32_t msk = 0;
20	char *s, *t;
21	int inc;
22
23	for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) {
24		if ((t = strchr(s, '=')))
25			*t++ = '\0';
26		for (io = ionames; io->on_name; io++) {
27			if (strcasecmp(s, io->on_name) || (msk & io->on_bit))
28				continue;
29			if ((inc = addipopt(op, io, len, t))) {
30				op += inc;
31				len += inc;
32			}
33			msk |= io->on_bit;
34			break;
35		}
36		if (!io->on_name) {
37			fprintf(stderr, "unknown IP option name %s\n", s);
38			return 0;
39		}
40	}
41	*op++ = IPOPT_EOL;
42	len++;
43	return len;
44}
45