xref: /freebsd/sbin/ipf/libipf/getproto.c (revision e0c4386e)
1 
2 /*
3  * Copyright (C) 2012 by Darren Reed.
4  *
5  * See the IPFILTER.LICENCE file for details on licencing.
6  *
7  * $Id$
8  */
9 
10 #include "ipf.h"
11 #include <ctype.h>
12 
13 int getproto(char *name);
14 
15 int
16 getproto(char *name)
17 {
18 	struct protoent *p;
19 	char *s;
20 
21 	for (s = name; *s != '\0'; s++)
22 		if (!ISDIGIT(*s))
23 			break;
24 	if (*s == '\0')
25 		return (atoi(name));
26 
27 	if (!strcasecmp(name, "ip"))
28 		return (0);
29 
30 	p = getprotobyname(name);
31 	if (p != NULL)
32 		return (p->p_proto);
33 	return (-1);
34 }
35