1/*	$NetBSD: getproto.c,v 1.8 2012/02/15 17:55:06 riz Exp $	*/
2
3/*
4 * Copyright (C) 2002-2005 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * Id: getproto.c,v 1.2.2.5 2009/12/27 06:58:06 darrenr Exp
9 */
10
11#include "ipf.h"
12
13int getproto(name)
14char *name;
15{
16	struct protoent *p;
17	char *s;
18
19	for (s = name; *s != '\0'; s++)
20		if (!ISDIGIT(*s))
21			break;
22	if (*s == '\0')
23		return atoi(name);
24
25#ifdef _AIX51
26	/*
27	 * For some bogus reason, "ip" is 252 in /etc/protocols on AIX 5
28	 * The IANA has doubled up on the definition of 0 - it is now also
29	 * used for IPv6 hop-opts, so we can no longer rely on /etc/protocols
30	 * providing the correct name->number mapping
31	 */
32#endif
33	if (!strcasecmp(name, "ip"))
34		return 0;
35
36	p = getprotobyname(name);
37	if (p != NULL)
38		return p->p_proto;
39	return -1;
40}
41