/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: portname.c,v 1.6 2002/01/28 06:50:47 darrenr Exp $
 */
#include "ipf.h"


char	*portname(pr, port)
int	pr, port;
{
	static	char	buf[32];
	struct	protoent	*p = NULL;
	struct	servent	*sv = NULL, *sv1 = NULL;

	if (pr == -1) {
		if ((sv = getservbyport(htons(port), "tcp"))) {
			strncpy(buf, sv->s_name, sizeof(buf)-1);
			buf[sizeof(buf)-1] = '\0';
			sv1 = getservbyport(htons(port), "udp");
			sv = strncasecmp(buf, sv->s_name, strlen(buf)) ?
			     NULL : sv1;
		}
		if (sv)
			return buf;
	} else if ((pr != -2) && (p = getprotobynumber(pr))) {
		if ((sv = getservbyport(htons(port), p->p_name))) {
			strncpy(buf, sv->s_name, sizeof(buf)-1);
			buf[sizeof(buf)-1] = '\0';
			return buf;
		}
	}

	(void) sprintf(buf, "%d", port);
	return buf;
}