1 /*
2 * Copyright (C) 1993-2001 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: portname.c,v 1.7 2003/08/14 14:27:43 darrenr Exp $
7 */
8 #include "ipf.h"
9
10
portname(pr,port)11 char *portname(pr, port)
12 int pr, port;
13 {
14 static char buf[32];
15 struct protoent *p = NULL;
16 struct servent *sv = NULL, *sv1 = NULL;
17
18 if ((opts & OPT_NORESOLVE) == 0) {
19 if (pr == -1) {
20 if ((sv = getservbyport(htons(port), "tcp"))) {
21 strncpy(buf, sv->s_name, sizeof(buf)-1);
22 buf[sizeof(buf)-1] = '\0';
23 sv1 = getservbyport(htons(port), "udp");
24 sv = strncasecmp(buf, sv->s_name, strlen(buf)) ?
25 NULL : sv1;
26 }
27 if (sv)
28 return buf;
29 } else if ((pr != -2) && (p = getprotobynumber(pr))) {
30 if ((sv = getservbyport(htons(port), p->p_name))) {
31 strncpy(buf, sv->s_name, sizeof(buf)-1);
32 buf[sizeof(buf)-1] = '\0';
33 return buf;
34 }
35 }
36 }
37
38 (void) sprintf(buf, "%d", port);
39 return buf;
40 }
41