summaryrefslogtreecommitdiff
path: root/external/bsd/ipf/dist/lib/getportproto.c
blob: 40873c2001c14213425d7ea01c1ac0dc9d3728e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/*	$NetBSD: getportproto.c,v 1.2 2012/07/22 14:27:36 darrenr Exp $	*/

/*
 * Copyright (C) 2012 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * Id: getportproto.c,v 1.1.1.2 2012/07/22 13:44:38 darrenr Exp $
 */

#include <ctype.h>
#include "ipf.h"

int getportproto(name, proto)
	char *name;
	int proto;
{
	struct servent *s;
	struct protoent *p;

	if (ISDIGIT(*name)) {
		int number;
		char *s;

		for (s = name; *s != '\0'; s++)
			if (!ISDIGIT(*s))
				return -1;

		number = atoi(name);
		if (number < 0 || number > 65535)
			return -1;
		return htons(number);
	}

	p = getprotobynumber(proto);
	s = getservbyname(name, p ? p->p_name : NULL);
	if (s != NULL)
		return s->s_port;
	return -1;
}