1 /* $NetBSD: getproto.c,v 1.2 2012/07/22 14:27:36 darrenr Exp $ */ 2 3 /* 4 * Copyright (C) 2012 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 * 8 * Id: getproto.c,v 1.1.1.2 2012/07/22 13:44:38 darrenr Exp $ 9 */ 10 11 #include "ipf.h" 12 #include <ctype.h> 13 getproto(name)14int getproto(name) 15 char *name; 16 { 17 struct protoent *p; 18 char *s; 19 20 for (s = name; *s != '\0'; s++) 21 if (!ISDIGIT(*s)) 22 break; 23 if (*s == '\0') 24 return atoi(name); 25 26 #ifdef _AIX51 27 /* 28 * For some bogus reason, "ip" is 252 in /etc/protocols on AIX 5 29 * The IANA has doubled up on the definition of 0 - it is now also 30 * used for IPv6 hop-opts, so we can no longer rely on /etc/protocols 31 * providing the correct name->number mapping 32 */ 33 #endif 34 if (!strcasecmp(name, "ip")) 35 return 0; 36 37 p = getprotobyname(name); 38 if (p != NULL) 39 return p->p_proto; 40 return -1; 41 } 42