1145519Sdarrenr/*	$FreeBSD$	*/
2145510Sdarrenr
3145510Sdarrenr/*
4255332Scy * Copyright (C) 2012 by Darren Reed.
5145510Sdarrenr *
6145510Sdarrenr * See the IPFILTER.LICENCE file for details on licencing.
7145510Sdarrenr *
8255332Scy * $Id$
9145510Sdarrenr */
10145510Sdarrenr
11145510Sdarrenr#include "ipf.h"
12145510Sdarrenr
13145510Sdarrenr
14145510Sdarrenru_32_t buildopts(cp, op, len)
15255332Scy	char *cp, *op;
16255332Scy	int len;
17145510Sdarrenr{
18145510Sdarrenr	struct ipopt_names *io;
19145510Sdarrenr	u_32_t msk = 0;
20145510Sdarrenr	char *s, *t;
21145510Sdarrenr	int inc;
22145510Sdarrenr
23145510Sdarrenr	for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) {
24145510Sdarrenr		if ((t = strchr(s, '=')))
25145510Sdarrenr			*t++ = '\0';
26255332Scy		else
27255332Scy			t = "";
28145510Sdarrenr		for (io = ionames; io->on_name; io++) {
29145510Sdarrenr			if (strcasecmp(s, io->on_name) || (msk & io->on_bit))
30145510Sdarrenr				continue;
31145510Sdarrenr			if ((inc = addipopt(op, io, len, t))) {
32145510Sdarrenr				op += inc;
33145510Sdarrenr				len += inc;
34145510Sdarrenr			}
35145510Sdarrenr			msk |= io->on_bit;
36145510Sdarrenr			break;
37145510Sdarrenr		}
38145510Sdarrenr		if (!io->on_name) {
39145510Sdarrenr			fprintf(stderr, "unknown IP option name %s\n", s);
40145510Sdarrenr			return 0;
41145510Sdarrenr		}
42145510Sdarrenr	}
43255332Scy	while ((len & 3) != 3) {
44255332Scy		*op++ = IPOPT_NOP;
45255332Scy		len++;
46255332Scy	}
47145510Sdarrenr	*op++ = IPOPT_EOL;
48145510Sdarrenr	len++;
49145510Sdarrenr	return len;
50145510Sdarrenr}
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