43 lines
995 B
C
43 lines
995 B
C
/* $NetBSD: portname.c,v 1.1.1.2 2007/04/14 20:17:31 martin Exp $ */
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/*
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* Copyright (C) 2000-2003 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* Id: portname.c,v 1.7.2.1 2006/06/16 17:21:09 darrenr Exp
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*/
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#include "ipf.h"
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char *portname(pr, port)
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int pr, port;
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{
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static char buf[32];
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struct protoent *p = NULL;
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struct servent *sv = NULL, *sv1 = NULL;
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if ((opts & OPT_NORESOLVE) == 0) {
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if (pr == -1) {
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if ((sv = getservbyport(htons(port), "tcp"))) {
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strncpy(buf, sv->s_name, sizeof(buf)-1);
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buf[sizeof(buf)-1] = '\0';
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sv1 = getservbyport(htons(port), "udp");
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sv = strncasecmp(buf, sv->s_name, strlen(buf)) ?
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NULL : sv1;
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}
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if (sv)
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return buf;
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} else if ((pr != -2) && (p = getprotobynumber(pr))) {
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if ((sv = getservbyport(htons(port), p->p_name))) {
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strncpy(buf, sv->s_name, sizeof(buf)-1);
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buf[sizeof(buf)-1] = '\0';
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return buf;
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}
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}
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}
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(void) sprintf(buf, "%d", port);
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return buf;
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}
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