/* $NetBSD: hostname.c,v 1.3 2012/10/22 01:21:57 christos Exp $ */ /* * Copyright (C) 2012 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * Id: hostname.c,v 1.1.1.2 2012/07/22 13:44:38 darrenr Exp $ */ #include "ipf.h" char * hostname(int family, const void *ip) { static char hostbuf[MAXHOSTNAMELEN+1]; struct hostent *hp; struct in_addr ipa; struct netent *np; memset(&ipa, 0, sizeof(ipa)); /* XXX gcc */ if (family == AF_INET) { ipa.s_addr = *(const u_32_t *)ip; if (ipa.s_addr == htonl(0xfedcba98)) return "test.host.dots"; } if ((opts & OPT_NORESOLVE) == 0) { if (family == AF_INET) { hp = gethostbyaddr(ip, 4, AF_INET); if (hp != NULL && hp->h_name != NULL && *hp->h_name != '\0') { strncpy(hostbuf, hp->h_name, sizeof(hostbuf)); hostbuf[sizeof(hostbuf) - 1] = '\0'; return hostbuf; } np = getnetbyaddr(ipa.s_addr, AF_INET); if (np != NULL && np->n_name != NULL && *np->n_name != '\0') { strncpy(hostbuf, np->n_name, sizeof(hostbuf)); hostbuf[sizeof(hostbuf) - 1] = '\0'; return hostbuf; } } } if (family == AF_INET) { return inet_ntoa(ipa); } #ifdef USE_INET6 (void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1); hostbuf[MAXHOSTNAMELEN] = '\0'; return hostbuf; #else return "IPv6"; #endif }