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 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