1 /* 2 * Copyright (C) 2003 by Darren Reed. 3 * 4 * See the IPFILTER.LICENCE file for details on licencing. 5 * 6 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 7 * Use is subject to license terms. 8 */ 9 10 #pragma ident "%Z%%M% %I% %E% SMI" 11 12 #include "ipf.h" 13 14 char *hostname(v, ip) 15 int v; 16 void *ip; 17 { 18 static char hostbuf[MAXHOSTNAMELEN+1]; 19 struct hostent *hp; 20 struct in_addr ipa; 21 struct netent *np; 22 23 if (v == 4) { 24 ipa.s_addr = *(u_32_t *)ip; 25 if (ipa.s_addr == htonl(0xfedcba98)) 26 return "test.host.dots"; 27 } 28 29 if ((opts & OPT_NORESOLVE) == 0) { 30 if (v == 4) { 31 hp = gethostbyaddr(ip, 4, AF_INET); 32 if (hp != NULL && hp->h_name != NULL && 33 *hp->h_name != '\0') { 34 strncpy(hostbuf, hp->h_name, sizeof(hostbuf)); 35 hostbuf[sizeof(hostbuf) - 1] = '\0'; 36 return hostbuf; 37 } 38 39 np = getnetbyaddr(ipa.s_addr, AF_INET); 40 if (np != NULL && np->n_name != NULL && 41 *np->n_name != '\0') { 42 strncpy(hostbuf, np->n_name, sizeof(hostbuf)); 43 hostbuf[sizeof(hostbuf) - 1] = '\0'; 44 return hostbuf; 45 } 46 } 47 } 48 49 if (v == 4) { 50 return inet_ntoa(ipa); 51 } 52 #ifdef USE_INET6 53 (void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1); 54 hostbuf[MAXHOSTNAMELEN] = '\0'; 55 return hostbuf; 56 #else 57 return "IPv6"; 58 #endif 59 } 60