1
2 /*
3 * Copyright (C) 2012 by Darren Reed.
4 *
5 * See the IPFILTER.LICENCE file for details on licencing.
6 *
7 * $Id$
8 */
9 #include "ipf.h"
10
11
12 char *
portname(int pr,int port)13 portname(int pr, int port)
14 {
15 static char buf[32];
16 struct protoent *p = NULL;
17 struct servent *sv = NULL;
18 struct servent *sv1 = NULL;
19
20 if ((opts & OPT_NORESOLVE) == 0) {
21 if (pr == -1) {
22 if ((sv = getservbyport(htons(port), "tcp"))) {
23 strncpy(buf, sv->s_name, sizeof(buf)-1);
24 buf[sizeof(buf)-1] = '\0';
25 sv1 = getservbyport(htons(port), "udp");
26 sv = strncasecmp(buf, sv->s_name, strlen(buf)) ?
27 NULL : sv1;
28 }
29 if (sv)
30 return (buf);
31 } else if ((pr != -2) && (p = getprotobynumber(pr))) {
32 if ((sv = getservbyport(htons(port), p->p_name))) {
33 strncpy(buf, sv->s_name, sizeof(buf)-1);
34 buf[sizeof(buf)-1] = '\0';
35 return (buf);
36 }
37 }
38 }
39
40 (void) snprintf(buf, sizeof(buf), "%d", port);
41 return (buf);
42 }
43