dist/ipf/lib/portname.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2000-2003 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * Id: portname.c,v 1.7.2.1 2006/06/16 17:21:09 darrenr Exp
   9  */
  10 #include "ipf.h"
  11
  12
  13 char    *portname(pr, port)
  14 int     pr, port;
  15 {
  16         static  char    buf[32];
  17         struct  protoent        *p = NULL;
  18         struct  servent *sv = NULL, *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) sprintf(buf, "%d", port);
  41         return buf;
  42 }