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 1.6 2002/01/28 06:50:47 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 (pr == -1) { 19 if ((sv = getservbyport(htons(port), "tcp"))) { 20 strncpy(buf, sv->s_name, sizeof(buf)-1); 21 buf[sizeof(buf)-1] = '\0'; 22 sv1 = getservbyport(htons(port), "udp"); 23 sv = strncasecmp(buf, sv->s_name, strlen(buf)) ? 24 NULL : sv1; 25 } 26 if (sv) 27 return buf; 28 } else if ((pr != -2) && (p = getprotobynumber(pr))) { 29 if ((sv = getservbyport(htons(port), p->p_name))) { 30 strncpy(buf, sv->s_name, sizeof(buf)-1); 31 buf[sizeof(buf)-1] = '\0'; 32 return buf; 33 } 34 } 35 36 (void) sprintf(buf, "%d", port); 37 return buf; 38 } 39