/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: portname.c,v 1.7 2003/08/14 14:27:43 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 ((opts & OPT_NORESOLVE) == 0) {
                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;
}