173b30f0cSJun-ichiro itojun Hagino /* $FreeBSD$ */ 23f587e57SKris Kennaway /* $KAME: name6.c,v 1.25 2000/06/26 16:44:40 itojun Exp $ */ 373b30f0cSJun-ichiro itojun Hagino 47d56d374SYoshinobu Inoue /* 57d56d374SYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 67d56d374SYoshinobu Inoue * All rights reserved. 77d56d374SYoshinobu Inoue * 87d56d374SYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 97d56d374SYoshinobu Inoue * modification, are permitted provided that the following conditions 107d56d374SYoshinobu Inoue * are met: 117d56d374SYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 127d56d374SYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 137d56d374SYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 147d56d374SYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 157d56d374SYoshinobu Inoue * documentation and/or other materials provided with the distribution. 167d56d374SYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 177d56d374SYoshinobu Inoue * may be used to endorse or promote products derived from this software 187d56d374SYoshinobu Inoue * without specific prior written permission. 197d56d374SYoshinobu Inoue * 207d56d374SYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 217d56d374SYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 227d56d374SYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 237d56d374SYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 247d56d374SYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 257d56d374SYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 267d56d374SYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 277d56d374SYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 287d56d374SYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 297d56d374SYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 307d56d374SYoshinobu Inoue * SUCH DAMAGE. 317d56d374SYoshinobu Inoue */ 3273b30f0cSJun-ichiro itojun Hagino /* 3373b30f0cSJun-ichiro itojun Hagino * ++Copyright++ 1985, 1988, 1993 3473b30f0cSJun-ichiro itojun Hagino * - 3573b30f0cSJun-ichiro itojun Hagino * Copyright (c) 1985, 1988, 1993 3673b30f0cSJun-ichiro itojun Hagino * The Regents of the University of California. All rights reserved. 3773b30f0cSJun-ichiro itojun Hagino * 3873b30f0cSJun-ichiro itojun Hagino * Redistribution and use in source and binary forms, with or without 3973b30f0cSJun-ichiro itojun Hagino * modification, are permitted provided that the following conditions 4073b30f0cSJun-ichiro itojun Hagino * are met: 4173b30f0cSJun-ichiro itojun Hagino * 1. Redistributions of source code must retain the above copyright 4273b30f0cSJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer. 4373b30f0cSJun-ichiro itojun Hagino * 2. Redistributions in binary form must reproduce the above copyright 4473b30f0cSJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer in the 4573b30f0cSJun-ichiro itojun Hagino * documentation and/or other materials provided with the distribution. 4673b30f0cSJun-ichiro itojun Hagino * 3. All advertising materials mentioning features or use of this software 4773b30f0cSJun-ichiro itojun Hagino * must display the following acknowledgement: 4873b30f0cSJun-ichiro itojun Hagino * This product includes software developed by the University of 4973b30f0cSJun-ichiro itojun Hagino * California, Berkeley and its contributors. 5073b30f0cSJun-ichiro itojun Hagino * 4. Neither the name of the University nor the names of its contributors 5173b30f0cSJun-ichiro itojun Hagino * may be used to endorse or promote products derived from this software 5273b30f0cSJun-ichiro itojun Hagino * without specific prior written permission. 5373b30f0cSJun-ichiro itojun Hagino * 5473b30f0cSJun-ichiro itojun Hagino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5573b30f0cSJun-ichiro itojun Hagino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5673b30f0cSJun-ichiro itojun Hagino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5773b30f0cSJun-ichiro itojun Hagino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5873b30f0cSJun-ichiro itojun Hagino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5973b30f0cSJun-ichiro itojun Hagino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6073b30f0cSJun-ichiro itojun Hagino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6173b30f0cSJun-ichiro itojun Hagino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6273b30f0cSJun-ichiro itojun Hagino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6373b30f0cSJun-ichiro itojun Hagino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6473b30f0cSJun-ichiro itojun Hagino * SUCH DAMAGE. 6573b30f0cSJun-ichiro itojun Hagino * - 6673b30f0cSJun-ichiro itojun Hagino * Portions Copyright (c) 1993 by Digital Equipment Corporation. 6773b30f0cSJun-ichiro itojun Hagino * 6873b30f0cSJun-ichiro itojun Hagino * Permission to use, copy, modify, and distribute this software for any 6973b30f0cSJun-ichiro itojun Hagino * purpose with or without fee is hereby granted, provided that the above 7073b30f0cSJun-ichiro itojun Hagino * copyright notice and this permission notice appear in all copies, and that 7173b30f0cSJun-ichiro itojun Hagino * the name of Digital Equipment Corporation not be used in advertising or 7273b30f0cSJun-ichiro itojun Hagino * publicity pertaining to distribution of the document or software without 7373b30f0cSJun-ichiro itojun Hagino * specific, written prior permission. 7473b30f0cSJun-ichiro itojun Hagino * 7573b30f0cSJun-ichiro itojun Hagino * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 7673b30f0cSJun-ichiro itojun Hagino * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 7773b30f0cSJun-ichiro itojun Hagino * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 7873b30f0cSJun-ichiro itojun Hagino * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 7973b30f0cSJun-ichiro itojun Hagino * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 8073b30f0cSJun-ichiro itojun Hagino * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 8173b30f0cSJun-ichiro itojun Hagino * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 8273b30f0cSJun-ichiro itojun Hagino * SOFTWARE. 8373b30f0cSJun-ichiro itojun Hagino * - 8473b30f0cSJun-ichiro itojun Hagino * --Copyright-- 8573b30f0cSJun-ichiro itojun Hagino */ 8673b30f0cSJun-ichiro itojun Hagino 877d56d374SYoshinobu Inoue /* 887d56d374SYoshinobu Inoue * Atsushi Onoe <onoe@sm.sony.co.jp> 897d56d374SYoshinobu Inoue */ 907d56d374SYoshinobu Inoue 917d56d374SYoshinobu Inoue /* 927d56d374SYoshinobu Inoue * TODO for thread safe 937d56d374SYoshinobu Inoue * use mutex for _hostconf, _hostconf_init. 947d56d374SYoshinobu Inoue * rewrite resolvers to be thread safe 957d56d374SYoshinobu Inoue */ 967d56d374SYoshinobu Inoue 97d201fe46SDaniel Eischen #include "namespace.h" 987d56d374SYoshinobu Inoue #include <sys/param.h> 997d56d374SYoshinobu Inoue #include <sys/socket.h> 1007d56d374SYoshinobu Inoue #include <sys/time.h> 101e6f35403SYoshinobu Inoue #include <sys/queue.h> 1027d56d374SYoshinobu Inoue #include <netinet/in.h> 1037d56d374SYoshinobu Inoue 1047d56d374SYoshinobu Inoue #include <arpa/inet.h> 1057d56d374SYoshinobu Inoue #include <arpa/nameser.h> 1067d56d374SYoshinobu Inoue 107e6f35403SYoshinobu Inoue #include <errno.h> 1087d56d374SYoshinobu Inoue #include <netdb.h> 1097d56d374SYoshinobu Inoue #include <resolv.h> 1107d56d374SYoshinobu Inoue #include <stdio.h> 1117d56d374SYoshinobu Inoue #include <stdlib.h> 1127d56d374SYoshinobu Inoue #include <string.h> 113248aee62SJacques Vidrine #include <stdarg.h> 114248aee62SJacques Vidrine #include <nsswitch.h> 1157d56d374SYoshinobu Inoue #include <unistd.h> 116d201fe46SDaniel Eischen #include "un-namespace.h" 1177d56d374SYoshinobu Inoue 1187d56d374SYoshinobu Inoue #ifndef _PATH_HOSTS 1197d56d374SYoshinobu Inoue #define _PATH_HOSTS "/etc/hosts" 1207d56d374SYoshinobu Inoue #endif 1217d56d374SYoshinobu Inoue 1227d56d374SYoshinobu Inoue #ifndef MAXALIASES 1237d56d374SYoshinobu Inoue #define MAXALIASES 10 1247d56d374SYoshinobu Inoue #endif 1257d56d374SYoshinobu Inoue #ifndef MAXADDRS 1267d56d374SYoshinobu Inoue #define MAXADDRS 20 1277d56d374SYoshinobu Inoue #endif 1287d56d374SYoshinobu Inoue #ifndef MAXDNAME 1297d56d374SYoshinobu Inoue #define MAXDNAME 1025 1307d56d374SYoshinobu Inoue #endif 1317d56d374SYoshinobu Inoue 1327d56d374SYoshinobu Inoue #ifdef INET6 1337d56d374SYoshinobu Inoue #define ADDRLEN(af) ((af) == AF_INET6 ? sizeof(struct in6_addr) : \ 1347d56d374SYoshinobu Inoue sizeof(struct in_addr)) 1357d56d374SYoshinobu Inoue #else 1367d56d374SYoshinobu Inoue #define ADDRLEN(af) sizeof(struct in_addr) 1377d56d374SYoshinobu Inoue #endif 1387d56d374SYoshinobu Inoue 1397d56d374SYoshinobu Inoue #define MAPADDR(ab, ina) \ 1407d56d374SYoshinobu Inoue do { \ 1417d56d374SYoshinobu Inoue memcpy(&(ab)->map_inaddr, ina, sizeof(struct in_addr)); \ 1427d56d374SYoshinobu Inoue memset((ab)->map_zero, 0, sizeof((ab)->map_zero)); \ 1437d56d374SYoshinobu Inoue memset((ab)->map_one, 0xff, sizeof((ab)->map_one)); \ 1447d56d374SYoshinobu Inoue } while (0) 1457d56d374SYoshinobu Inoue #define MAPADDRENABLED(flags) \ 1467d56d374SYoshinobu Inoue (((flags) & AI_V4MAPPED) || \ 1477d56d374SYoshinobu Inoue (((flags) & AI_V4MAPPED_CFG) && _mapped_addr_enabled())) 1487d56d374SYoshinobu Inoue 1497d56d374SYoshinobu Inoue union inx_addr { 1507d56d374SYoshinobu Inoue struct in_addr in_addr; 1517d56d374SYoshinobu Inoue #ifdef INET6 1527d56d374SYoshinobu Inoue struct in6_addr in6_addr; 1537d56d374SYoshinobu Inoue #endif 1547d56d374SYoshinobu Inoue struct { 1557d56d374SYoshinobu Inoue u_char mau_zero[10]; 1567d56d374SYoshinobu Inoue u_char mau_one[2]; 1577d56d374SYoshinobu Inoue struct in_addr mau_inaddr; 1587d56d374SYoshinobu Inoue } map_addr_un; 1597d56d374SYoshinobu Inoue #define map_zero map_addr_un.mau_zero 1607d56d374SYoshinobu Inoue #define map_one map_addr_un.mau_one 1617d56d374SYoshinobu Inoue #define map_inaddr map_addr_un.mau_inaddr 1627d56d374SYoshinobu Inoue }; 1637d56d374SYoshinobu Inoue 1647d56d374SYoshinobu Inoue static struct hostent *_hpcopy(struct hostent *hp, int *errp); 1657d56d374SYoshinobu Inoue static struct hostent *_hpaddr(int af, const char *name, void *addr, int *errp); 1667d56d374SYoshinobu Inoue static struct hostent *_hpmerge(struct hostent *hp1, struct hostent *hp2, int *errp); 1677d56d374SYoshinobu Inoue #ifdef INET6 1687d56d374SYoshinobu Inoue static struct hostent *_hpmapv6(struct hostent *hp, int *errp); 1697d56d374SYoshinobu Inoue #endif 1707d56d374SYoshinobu Inoue static struct hostent *_hpsort(struct hostent *hp); 1717d56d374SYoshinobu Inoue static struct hostent *_ghbyname(const char *name, int af, int flags, int *errp); 1727d56d374SYoshinobu Inoue static char *_hgetword(char **pp); 1737d56d374SYoshinobu Inoue static int _mapped_addr_enabled(void); 1747d56d374SYoshinobu Inoue 1757d56d374SYoshinobu Inoue static FILE *_files_open(int *errp); 176248aee62SJacques Vidrine static int _files_ghbyname(void *, void *, va_list); 177248aee62SJacques Vidrine static int _files_ghbyaddr(void *, void *, va_list); 1787d56d374SYoshinobu Inoue static void _files_shent(int stayopen); 1797d56d374SYoshinobu Inoue static void _files_ehent(void); 18073b30f0cSJun-ichiro itojun Hagino #ifdef YP 181248aee62SJacques Vidrine static int _nis_ghbyname(void *, void *, va_list); 182248aee62SJacques Vidrine static int _nis_ghbyaddr(void *, void *, va_list); 18373b30f0cSJun-ichiro itojun Hagino #endif 184248aee62SJacques Vidrine static int _dns_ghbyname(void *, void *, va_list); 185248aee62SJacques Vidrine static int _dns_ghbyaddr(void *, void *, va_list); 1867d56d374SYoshinobu Inoue static void _dns_shent(int stayopen); 1877d56d374SYoshinobu Inoue static void _dns_ehent(void); 1887d56d374SYoshinobu Inoue #ifdef ICMPNL 189248aee62SJacques Vidrine static int _icmp_ghbyaddr(void *, void *, va_list); 1907d56d374SYoshinobu Inoue #endif /* ICMPNL */ 1917d56d374SYoshinobu Inoue 192248aee62SJacques Vidrine /* Host lookup order if nsswitch.conf is broken or nonexistant */ 193248aee62SJacques Vidrine static const ns_src default_src[] = { 194248aee62SJacques Vidrine { NSSRC_FILES, NS_SUCCESS }, 195248aee62SJacques Vidrine { NSSRC_DNS, NS_SUCCESS }, 1967d56d374SYoshinobu Inoue #ifdef ICMPNL 197248aee62SJacques Vidrine #define NSSRC_ICMP "icmp" 198248aee62SJacques Vidrine { NSSRC_ICMP, NS_SUCCESS }, 19973b30f0cSJun-ichiro itojun Hagino #endif 200248aee62SJacques Vidrine { 0 } 201248aee62SJacques Vidrine }; 2027d56d374SYoshinobu Inoue 2037d56d374SYoshinobu Inoue /* 2047d56d374SYoshinobu Inoue * Check if kernel supports mapped address. 2057d56d374SYoshinobu Inoue * implementation dependent 2067d56d374SYoshinobu Inoue */ 2077d56d374SYoshinobu Inoue #ifdef __KAME__ 2087d56d374SYoshinobu Inoue #include <sys/sysctl.h> 2097d56d374SYoshinobu Inoue #endif /* __KAME__ */ 2107d56d374SYoshinobu Inoue 2117d56d374SYoshinobu Inoue static int 2127d56d374SYoshinobu Inoue _mapped_addr_enabled(void) 2137d56d374SYoshinobu Inoue { 2147d56d374SYoshinobu Inoue /* implementation dependent check */ 2157d56d374SYoshinobu Inoue #if defined(__KAME__) && defined(IPV6CTL_MAPPED_ADDR) 2167d56d374SYoshinobu Inoue int mib[4]; 2177d56d374SYoshinobu Inoue size_t len; 2187d56d374SYoshinobu Inoue int val; 2197d56d374SYoshinobu Inoue 2207d56d374SYoshinobu Inoue mib[0] = CTL_NET; 2217d56d374SYoshinobu Inoue mib[1] = PF_INET6; 2227d56d374SYoshinobu Inoue mib[2] = IPPROTO_IPV6; 2237d56d374SYoshinobu Inoue mib[3] = IPV6CTL_MAPPED_ADDR; 2247d56d374SYoshinobu Inoue len = sizeof(val); 2257d56d374SYoshinobu Inoue if (sysctl(mib, 4, &val, &len, 0, 0) == 0 && val != 0) 2267d56d374SYoshinobu Inoue return 1; 2277d56d374SYoshinobu Inoue #endif /* __KAME__ && IPV6CTL_MAPPED_ADDR */ 2287d56d374SYoshinobu Inoue return 0; 2297d56d374SYoshinobu Inoue } 2307d56d374SYoshinobu Inoue 2317d56d374SYoshinobu Inoue /* 2327d56d374SYoshinobu Inoue * Functions defined in RFC2553 23373b30f0cSJun-ichiro itojun Hagino * getipnodebyname, getipnodebyaddr, freehostent 2347d56d374SYoshinobu Inoue */ 2357d56d374SYoshinobu Inoue 2367d56d374SYoshinobu Inoue static struct hostent * 2377d56d374SYoshinobu Inoue _ghbyname(const char *name, int af, int flags, int *errp) 2387d56d374SYoshinobu Inoue { 2397d56d374SYoshinobu Inoue struct hostent *hp; 240cb0600bdSJacques Vidrine int rval; 241248aee62SJacques Vidrine 242248aee62SJacques Vidrine static const ns_dtab dtab[] = { 243248aee62SJacques Vidrine NS_FILES_CB(_files_ghbyname, NULL) 244248aee62SJacques Vidrine { NSSRC_DNS, _dns_ghbyname, NULL }, 245248aee62SJacques Vidrine NS_NIS_CB(_nis_ghbyname, NULL) 246248aee62SJacques Vidrine { 0 } 247248aee62SJacques Vidrine }; 2487d56d374SYoshinobu Inoue 2497d56d374SYoshinobu Inoue if (flags & AI_ADDRCONFIG) { 2507d56d374SYoshinobu Inoue int s; 2517d56d374SYoshinobu Inoue 2527d56d374SYoshinobu Inoue /* 2537d56d374SYoshinobu Inoue * TODO: 2547d56d374SYoshinobu Inoue * Note that implementation dependent test for address 2557d56d374SYoshinobu Inoue * configuration should be done everytime called 2567d56d374SYoshinobu Inoue * (or apropriate interval), 2577d56d374SYoshinobu Inoue * because addresses will be dynamically assigned or deleted. 2587d56d374SYoshinobu Inoue */ 259e6f35403SYoshinobu Inoue if (af == AF_UNSPEC) { 260d201fe46SDaniel Eischen if ((s = _socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 261e6f35403SYoshinobu Inoue af = AF_INET; 262e6f35403SYoshinobu Inoue else { 2639233c4d9SJason Evans _close(s); 264d201fe46SDaniel Eischen if ((s = _socket(AF_INET, SOCK_DGRAM, 0)) < 0) 265e6f35403SYoshinobu Inoue af = AF_INET6; 266e6f35403SYoshinobu Inoue else 267e6f35403SYoshinobu Inoue _close(s); 268e6f35403SYoshinobu Inoue } 269e6f35403SYoshinobu Inoue 270e6f35403SYoshinobu Inoue } 271e6f35403SYoshinobu Inoue if (af != AF_UNSPEC) { 272d201fe46SDaniel Eischen if ((s = _socket(af, SOCK_DGRAM, 0)) < 0) 273e6f35403SYoshinobu Inoue return NULL; 274e6f35403SYoshinobu Inoue _close(s); 275e6f35403SYoshinobu Inoue } 2767d56d374SYoshinobu Inoue } 2777d56d374SYoshinobu Inoue 278248aee62SJacques Vidrine rval = nsdispatch(&hp, dtab, NSDB_HOSTS, "ghbyname", default_src, 279248aee62SJacques Vidrine name, af, errp); 280248aee62SJacques Vidrine return (rval == NS_SUCCESS) ? hp : NULL; 2817d56d374SYoshinobu Inoue } 2827d56d374SYoshinobu Inoue 283e6f35403SYoshinobu Inoue /* getipnodebyname() internal routine for multiple query(PF_UNSPEC) support. */ 2847d56d374SYoshinobu Inoue struct hostent * 285e6f35403SYoshinobu Inoue _getipnodebyname_multi(const char *name, int af, int flags, int *errp) 2867d56d374SYoshinobu Inoue { 2877d56d374SYoshinobu Inoue struct hostent *hp; 2887d56d374SYoshinobu Inoue union inx_addr addrbuf; 2897d56d374SYoshinobu Inoue 290e6f35403SYoshinobu Inoue /* XXX: PF_UNSPEC is only supposed to be passed from getaddrinfo() */ 2917d56d374SYoshinobu Inoue if (af != AF_INET 2927d56d374SYoshinobu Inoue #ifdef INET6 2937d56d374SYoshinobu Inoue && af != AF_INET6 2947d56d374SYoshinobu Inoue #endif 295e6f35403SYoshinobu Inoue && af != PF_UNSPEC 2967d56d374SYoshinobu Inoue ) 2977d56d374SYoshinobu Inoue { 2987d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 2997d56d374SYoshinobu Inoue return NULL; 3007d56d374SYoshinobu Inoue } 3017d56d374SYoshinobu Inoue 3027d56d374SYoshinobu Inoue #ifdef INET6 3037d56d374SYoshinobu Inoue /* special case for literal address */ 3047d56d374SYoshinobu Inoue if (inet_pton(AF_INET6, name, &addrbuf) == 1) { 3057d56d374SYoshinobu Inoue if (af != AF_INET6) { 3067d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 3077d56d374SYoshinobu Inoue return NULL; 3087d56d374SYoshinobu Inoue } 3097d56d374SYoshinobu Inoue return _hpaddr(af, name, &addrbuf, errp); 3107d56d374SYoshinobu Inoue } 3117d56d374SYoshinobu Inoue #endif 312be26adb5SYoshinobu Inoue if (inet_aton(name, (struct in_addr *)&addrbuf) == 1) { 3137d56d374SYoshinobu Inoue if (af != AF_INET) { 3147d56d374SYoshinobu Inoue if (MAPADDRENABLED(flags)) { 3157d56d374SYoshinobu Inoue MAPADDR(&addrbuf, &addrbuf.in_addr); 3167d56d374SYoshinobu Inoue } else { 3177d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 3187d56d374SYoshinobu Inoue return NULL; 3197d56d374SYoshinobu Inoue } 3207d56d374SYoshinobu Inoue } 3217d56d374SYoshinobu Inoue return _hpaddr(af, name, &addrbuf, errp); 3227d56d374SYoshinobu Inoue } 3237d56d374SYoshinobu Inoue 3247d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 3257d56d374SYoshinobu Inoue hp = _ghbyname(name, af, flags, errp); 3267d56d374SYoshinobu Inoue 3277d56d374SYoshinobu Inoue #ifdef INET6 3287d56d374SYoshinobu Inoue if (af == AF_INET6 3297d56d374SYoshinobu Inoue && ((flags & AI_ALL) || hp == NULL) 3307d56d374SYoshinobu Inoue && (MAPADDRENABLED(flags))) { 3317d56d374SYoshinobu Inoue struct hostent *hp2 = _ghbyname(name, AF_INET, flags, errp); 3327d56d374SYoshinobu Inoue if (hp == NULL) 3337d56d374SYoshinobu Inoue hp = _hpmapv6(hp2, errp); 3347d56d374SYoshinobu Inoue else { 3357d56d374SYoshinobu Inoue if (hp2 && strcmp(hp->h_name, hp2->h_name) != 0) { 3367d56d374SYoshinobu Inoue freehostent(hp2); 3377d56d374SYoshinobu Inoue hp2 = NULL; 3387d56d374SYoshinobu Inoue } 3397d56d374SYoshinobu Inoue hp = _hpmerge(hp, hp2, errp); 3407d56d374SYoshinobu Inoue } 3417d56d374SYoshinobu Inoue } 3427d56d374SYoshinobu Inoue #endif 3437d56d374SYoshinobu Inoue return _hpsort(hp); 3447d56d374SYoshinobu Inoue } 3457d56d374SYoshinobu Inoue 3467d56d374SYoshinobu Inoue struct hostent * 347e6f35403SYoshinobu Inoue getipnodebyname(const char *name, int af, int flags, int *errp) 348e6f35403SYoshinobu Inoue { 349e6f35403SYoshinobu Inoue if (af != AF_INET 350e6f35403SYoshinobu Inoue #ifdef INET6 351e6f35403SYoshinobu Inoue && af != AF_INET6 352e6f35403SYoshinobu Inoue #endif 353e6f35403SYoshinobu Inoue ) 354e6f35403SYoshinobu Inoue { 355e6f35403SYoshinobu Inoue *errp = NO_RECOVERY; 356e6f35403SYoshinobu Inoue return NULL; 357e6f35403SYoshinobu Inoue } 358e6f35403SYoshinobu Inoue return(_getipnodebyname_multi(name, af ,flags, errp)); 359e6f35403SYoshinobu Inoue } 360e6f35403SYoshinobu Inoue 361e6f35403SYoshinobu Inoue struct hostent * 3627d56d374SYoshinobu Inoue getipnodebyaddr(const void *src, size_t len, int af, int *errp) 3637d56d374SYoshinobu Inoue { 3647d56d374SYoshinobu Inoue struct hostent *hp; 365cb0600bdSJacques Vidrine int rval; 3667d56d374SYoshinobu Inoue #ifdef INET6 3677d56d374SYoshinobu Inoue struct in6_addr addrbuf; 3687d56d374SYoshinobu Inoue #else 3697d56d374SYoshinobu Inoue struct in_addr addrbuf; 3707d56d374SYoshinobu Inoue #endif 3717d56d374SYoshinobu Inoue 372248aee62SJacques Vidrine static const ns_dtab dtab[] = { 373248aee62SJacques Vidrine NS_FILES_CB(_files_ghbyaddr, NULL) 374248aee62SJacques Vidrine { NSSRC_DNS, _dns_ghbyaddr, NULL }, 375248aee62SJacques Vidrine NS_NIS_CB(_nis_ghbyaddr, NULL) 376248aee62SJacques Vidrine #ifdef ICMPNL 377248aee62SJacques Vidrine { NSSRC_ICMP, _icmp_ghbyaddr, NULL }, 378248aee62SJacques Vidrine #endif 379248aee62SJacques Vidrine { 0 } 380248aee62SJacques Vidrine }; 381248aee62SJacques Vidrine 3827d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 3837d56d374SYoshinobu Inoue 3847d56d374SYoshinobu Inoue switch (af) { 3857d56d374SYoshinobu Inoue case AF_INET: 3867d56d374SYoshinobu Inoue if (len != sizeof(struct in_addr)) { 3877d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 3887d56d374SYoshinobu Inoue return NULL; 3897d56d374SYoshinobu Inoue } 3907d56d374SYoshinobu Inoue if ((long)src & ~(sizeof(struct in_addr) - 1)) { 3917d56d374SYoshinobu Inoue memcpy(&addrbuf, src, len); 3927d56d374SYoshinobu Inoue src = &addrbuf; 3937d56d374SYoshinobu Inoue } 3947d56d374SYoshinobu Inoue if (((struct in_addr *)src)->s_addr == 0) 3957d56d374SYoshinobu Inoue return NULL; 3967d56d374SYoshinobu Inoue break; 3977d56d374SYoshinobu Inoue #ifdef INET6 3987d56d374SYoshinobu Inoue case AF_INET6: 3997d56d374SYoshinobu Inoue if (len != sizeof(struct in6_addr)) { 4007d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 4017d56d374SYoshinobu Inoue return NULL; 4027d56d374SYoshinobu Inoue } 4037d56d374SYoshinobu Inoue if ((long)src & ~(sizeof(struct in6_addr) / 2 - 1)) { /*XXX*/ 4047d56d374SYoshinobu Inoue memcpy(&addrbuf, src, len); 4057d56d374SYoshinobu Inoue src = &addrbuf; 4067d56d374SYoshinobu Inoue } 4073d670abcSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *)src)) 4083d670abcSYoshinobu Inoue return NULL; 4097d56d374SYoshinobu Inoue if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)src) 4107d56d374SYoshinobu Inoue || IN6_IS_ADDR_V4COMPAT((struct in6_addr *)src)) { 4117d56d374SYoshinobu Inoue src = (char *)src + 4127d56d374SYoshinobu Inoue (sizeof(struct in6_addr) - sizeof(struct in_addr)); 4137d56d374SYoshinobu Inoue af = AF_INET; 4147d56d374SYoshinobu Inoue len = sizeof(struct in_addr); 4157d56d374SYoshinobu Inoue } 4167d56d374SYoshinobu Inoue break; 4177d56d374SYoshinobu Inoue #endif 4187d56d374SYoshinobu Inoue default: 4197d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 4207d56d374SYoshinobu Inoue return NULL; 4217d56d374SYoshinobu Inoue } 4227d56d374SYoshinobu Inoue 423248aee62SJacques Vidrine rval = nsdispatch(&hp, dtab, NSDB_HOSTS, "ghbyaddr", default_src, 424248aee62SJacques Vidrine src, len, af, errp); 425248aee62SJacques Vidrine return (rval == NS_SUCCESS) ? hp : NULL; 4267d56d374SYoshinobu Inoue } 4277d56d374SYoshinobu Inoue 4287d56d374SYoshinobu Inoue void 4297d56d374SYoshinobu Inoue freehostent(struct hostent *ptr) 4307d56d374SYoshinobu Inoue { 4317d56d374SYoshinobu Inoue free(ptr); 4327d56d374SYoshinobu Inoue } 4337d56d374SYoshinobu Inoue 4347d56d374SYoshinobu Inoue #if 0 4357d56d374SYoshinobu Inoue 4367d56d374SYoshinobu Inoue /* XXX: should be deprecated */ 4377d56d374SYoshinobu Inoue struct hostent * 4387d56d374SYoshinobu Inoue getnodebyname(const char *name, int af, int flags) 4397d56d374SYoshinobu Inoue { 4407d56d374SYoshinobu Inoue return getipnodebyname(name, af, flags, &h_errno); 4417d56d374SYoshinobu Inoue } 4427d56d374SYoshinobu Inoue 4437d56d374SYoshinobu Inoue #ifdef __warn_references 4447d56d374SYoshinobu Inoue __warn_references(getnodebyname, 4457d56d374SYoshinobu Inoue "warning: getnodebyname() deprecated, " 4467d56d374SYoshinobu Inoue "should use getaddrinfo() or getipnodebyname()"); 4477d56d374SYoshinobu Inoue #endif 4487d56d374SYoshinobu Inoue 4497d56d374SYoshinobu Inoue struct hostent * 4507d56d374SYoshinobu Inoue getnodebyaddr(const void *src, size_t len, int af) 4517d56d374SYoshinobu Inoue { 4527d56d374SYoshinobu Inoue return getipnodebyaddr(src, len, af, &h_errno); 4537d56d374SYoshinobu Inoue } 4547d56d374SYoshinobu Inoue 4557d56d374SYoshinobu Inoue #ifdef __warn_references 4567d56d374SYoshinobu Inoue __warn_references(getnodebyaddr, 4577d56d374SYoshinobu Inoue "warning: getnodebyaddr() deprecated, " 4587d56d374SYoshinobu Inoue "should use getnameinfo() or getipnodebyaddr()"); 4597d56d374SYoshinobu Inoue #endif 4607d56d374SYoshinobu Inoue 4617d56d374SYoshinobu Inoue #endif 4627d56d374SYoshinobu Inoue 4637d56d374SYoshinobu Inoue /* 4647d56d374SYoshinobu Inoue * Private utility functions 4657d56d374SYoshinobu Inoue */ 4667d56d374SYoshinobu Inoue 4677d56d374SYoshinobu Inoue /* 4687d56d374SYoshinobu Inoue * _hpcopy: allocate and copy hostent structure 4697d56d374SYoshinobu Inoue */ 4707d56d374SYoshinobu Inoue static struct hostent * 4717d56d374SYoshinobu Inoue _hpcopy(struct hostent *hp, int *errp) 4727d56d374SYoshinobu Inoue { 4737d56d374SYoshinobu Inoue struct hostent *nhp; 4747d56d374SYoshinobu Inoue char *cp, **pp; 4757d56d374SYoshinobu Inoue int size, addrsize; 4767d56d374SYoshinobu Inoue int nalias = 0, naddr = 0; 4777d56d374SYoshinobu Inoue int al_off; 4787d56d374SYoshinobu Inoue int i; 4797d56d374SYoshinobu Inoue 4807d56d374SYoshinobu Inoue if (hp == NULL) 4817d56d374SYoshinobu Inoue return hp; 4827d56d374SYoshinobu Inoue 4837d56d374SYoshinobu Inoue /* count size to be allocated */ 4847d56d374SYoshinobu Inoue size = sizeof(struct hostent); 48505c36511SHajimu UMEMOTO if (hp->h_name != NULL) 4867d56d374SYoshinobu Inoue size += strlen(hp->h_name) + 1; 4877d56d374SYoshinobu Inoue if ((pp = hp->h_aliases) != NULL) { 4887d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; i++, pp++) { 4897d56d374SYoshinobu Inoue if (**pp != '\0') { 4907d56d374SYoshinobu Inoue size += strlen(*pp) + 1; 4917d56d374SYoshinobu Inoue nalias++; 4927d56d374SYoshinobu Inoue } 4937d56d374SYoshinobu Inoue } 4947d56d374SYoshinobu Inoue } 4957d56d374SYoshinobu Inoue /* adjust alignment */ 4967d56d374SYoshinobu Inoue size = ALIGN(size); 4977d56d374SYoshinobu Inoue al_off = size; 4987d56d374SYoshinobu Inoue size += sizeof(char *) * (nalias + 1); 4997d56d374SYoshinobu Inoue addrsize = ALIGN(hp->h_length); 5007d56d374SYoshinobu Inoue if ((pp = hp->h_addr_list) != NULL) { 5017d56d374SYoshinobu Inoue while (*pp++ != NULL) 5027d56d374SYoshinobu Inoue naddr++; 5037d56d374SYoshinobu Inoue } 5047d56d374SYoshinobu Inoue size += addrsize * naddr; 5057d56d374SYoshinobu Inoue size += sizeof(char *) * (naddr + 1); 5067d56d374SYoshinobu Inoue 5077d56d374SYoshinobu Inoue /* copy */ 5087d56d374SYoshinobu Inoue if ((nhp = (struct hostent *)malloc(size)) == NULL) { 5097d56d374SYoshinobu Inoue *errp = TRY_AGAIN; 5107d56d374SYoshinobu Inoue return NULL; 5117d56d374SYoshinobu Inoue } 5127d56d374SYoshinobu Inoue cp = (char *)&nhp[1]; 51305c36511SHajimu UMEMOTO if (hp->h_name != NULL) { 5147d56d374SYoshinobu Inoue nhp->h_name = cp; 5157d56d374SYoshinobu Inoue strcpy(cp, hp->h_name); 5167d56d374SYoshinobu Inoue cp += strlen(cp) + 1; 5177d56d374SYoshinobu Inoue } else 5187d56d374SYoshinobu Inoue nhp->h_name = NULL; 5197d56d374SYoshinobu Inoue nhp->h_aliases = (char **)((char *)nhp + al_off); 5207d56d374SYoshinobu Inoue if ((pp = hp->h_aliases) != NULL) { 5217d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; pp++) { 5227d56d374SYoshinobu Inoue if (**pp != '\0') { 5237d56d374SYoshinobu Inoue nhp->h_aliases[i++] = cp; 5247d56d374SYoshinobu Inoue strcpy(cp, *pp); 5257d56d374SYoshinobu Inoue cp += strlen(cp) + 1; 5267d56d374SYoshinobu Inoue } 5277d56d374SYoshinobu Inoue } 5287d56d374SYoshinobu Inoue } 5297d56d374SYoshinobu Inoue nhp->h_aliases[nalias] = NULL; 5307d56d374SYoshinobu Inoue cp = (char *)&nhp->h_aliases[nalias + 1]; 5317d56d374SYoshinobu Inoue nhp->h_addrtype = hp->h_addrtype; 5327d56d374SYoshinobu Inoue nhp->h_length = hp->h_length; 5337d56d374SYoshinobu Inoue nhp->h_addr_list = (char **)cp; 5347d56d374SYoshinobu Inoue if ((pp = hp->h_addr_list) != NULL) { 5357d56d374SYoshinobu Inoue cp = (char *)&nhp->h_addr_list[naddr + 1]; 5367d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; pp++) { 5377d56d374SYoshinobu Inoue nhp->h_addr_list[i++] = cp; 5387d56d374SYoshinobu Inoue memcpy(cp, *pp, hp->h_length); 5397d56d374SYoshinobu Inoue cp += addrsize; 5407d56d374SYoshinobu Inoue } 5417d56d374SYoshinobu Inoue } 5427d56d374SYoshinobu Inoue nhp->h_addr_list[naddr] = NULL; 5437d56d374SYoshinobu Inoue return nhp; 5447d56d374SYoshinobu Inoue } 5457d56d374SYoshinobu Inoue 5467d56d374SYoshinobu Inoue /* 5477d56d374SYoshinobu Inoue * _hpaddr: construct hostent structure with one address 5487d56d374SYoshinobu Inoue */ 5497d56d374SYoshinobu Inoue static struct hostent * 5507d56d374SYoshinobu Inoue _hpaddr(int af, const char *name, void *addr, int *errp) 5517d56d374SYoshinobu Inoue { 5527d56d374SYoshinobu Inoue struct hostent *hp, hpbuf; 5537d56d374SYoshinobu Inoue char *addrs[2]; 5547d56d374SYoshinobu Inoue 5557d56d374SYoshinobu Inoue hp = &hpbuf; 5567d56d374SYoshinobu Inoue hp->h_name = (char *)name; 5577d56d374SYoshinobu Inoue hp->h_aliases = NULL; 5587d56d374SYoshinobu Inoue hp->h_addrtype = af; 5597d56d374SYoshinobu Inoue hp->h_length = ADDRLEN(af); 5607d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 5617d56d374SYoshinobu Inoue addrs[0] = (char *)addr; 5627d56d374SYoshinobu Inoue addrs[1] = NULL; 5637d56d374SYoshinobu Inoue return _hpcopy(hp, errp); 5647d56d374SYoshinobu Inoue } 5657d56d374SYoshinobu Inoue 5667d56d374SYoshinobu Inoue /* 5677d56d374SYoshinobu Inoue * _hpmerge: merge 2 hostent structure, arguments will be freed 5687d56d374SYoshinobu Inoue */ 5697d56d374SYoshinobu Inoue static struct hostent * 5707d56d374SYoshinobu Inoue _hpmerge(struct hostent *hp1, struct hostent *hp2, int *errp) 5717d56d374SYoshinobu Inoue { 5727d56d374SYoshinobu Inoue int i, j; 5737d56d374SYoshinobu Inoue int naddr, nalias; 5747d56d374SYoshinobu Inoue char **pp; 5757d56d374SYoshinobu Inoue struct hostent *hp, hpbuf; 5767d56d374SYoshinobu Inoue char *aliases[MAXALIASES + 1], *addrs[MAXADDRS + 1]; 5777d56d374SYoshinobu Inoue union inx_addr addrbuf[MAXADDRS]; 5787d56d374SYoshinobu Inoue 5797d56d374SYoshinobu Inoue if (hp1 == NULL) 5807d56d374SYoshinobu Inoue return hp2; 5817d56d374SYoshinobu Inoue if (hp2 == NULL) 5827d56d374SYoshinobu Inoue return hp1; 5837d56d374SYoshinobu Inoue 5847d56d374SYoshinobu Inoue #define HP(i) (i == 1 ? hp1 : hp2) 5857d56d374SYoshinobu Inoue hp = &hpbuf; 5867d56d374SYoshinobu Inoue hp->h_name = (hp1->h_name != NULL ? hp1->h_name : hp2->h_name); 5877d56d374SYoshinobu Inoue hp->h_aliases = aliases; 5887d56d374SYoshinobu Inoue nalias = 0; 5897d56d374SYoshinobu Inoue for (i = 1; i <= 2; i++) { 5907d56d374SYoshinobu Inoue if ((pp = HP(i)->h_aliases) == NULL) 5917d56d374SYoshinobu Inoue continue; 5927d56d374SYoshinobu Inoue for (; nalias < MAXALIASES && *pp != NULL; pp++) { 5937d56d374SYoshinobu Inoue /* check duplicates */ 5947d56d374SYoshinobu Inoue for (j = 0; j < nalias; j++) 5957d56d374SYoshinobu Inoue if (strcasecmp(*pp, aliases[j]) == 0) 5967d56d374SYoshinobu Inoue break; 5977d56d374SYoshinobu Inoue if (j == nalias) 5987d56d374SYoshinobu Inoue aliases[nalias++] = *pp; 5997d56d374SYoshinobu Inoue } 6007d56d374SYoshinobu Inoue } 6017d56d374SYoshinobu Inoue aliases[nalias] = NULL; 6027d56d374SYoshinobu Inoue #ifdef INET6 6037d56d374SYoshinobu Inoue if (hp1->h_length != hp2->h_length) { 6047d56d374SYoshinobu Inoue hp->h_addrtype = AF_INET6; 6057d56d374SYoshinobu Inoue hp->h_length = sizeof(struct in6_addr); 6067d56d374SYoshinobu Inoue } else { 6077d56d374SYoshinobu Inoue #endif 6087d56d374SYoshinobu Inoue hp->h_addrtype = hp1->h_addrtype; 6097d56d374SYoshinobu Inoue hp->h_length = hp1->h_length; 6107d56d374SYoshinobu Inoue #ifdef INET6 6117d56d374SYoshinobu Inoue } 6127d56d374SYoshinobu Inoue #endif 6137d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 6147d56d374SYoshinobu Inoue naddr = 0; 6157d56d374SYoshinobu Inoue for (i = 1; i <= 2; i++) { 6167d56d374SYoshinobu Inoue if ((pp = HP(i)->h_addr_list) == NULL) 6177d56d374SYoshinobu Inoue continue; 6187d56d374SYoshinobu Inoue if (HP(i)->h_length == hp->h_length) { 6197d56d374SYoshinobu Inoue while (naddr < MAXADDRS && *pp != NULL) 6207d56d374SYoshinobu Inoue addrs[naddr++] = *pp++; 6217d56d374SYoshinobu Inoue } else { 6227d56d374SYoshinobu Inoue /* copy IPv4 addr as mapped IPv6 addr */ 6237d56d374SYoshinobu Inoue while (naddr < MAXADDRS && *pp != NULL) { 6247d56d374SYoshinobu Inoue MAPADDR(&addrbuf[naddr], *pp++); 6257d56d374SYoshinobu Inoue addrs[naddr] = (char *)&addrbuf[naddr]; 6267d56d374SYoshinobu Inoue naddr++; 6277d56d374SYoshinobu Inoue } 6287d56d374SYoshinobu Inoue } 6297d56d374SYoshinobu Inoue } 6307d56d374SYoshinobu Inoue addrs[naddr] = NULL; 6317d56d374SYoshinobu Inoue hp = _hpcopy(hp, errp); 6327d56d374SYoshinobu Inoue freehostent(hp1); 6337d56d374SYoshinobu Inoue freehostent(hp2); 6347d56d374SYoshinobu Inoue return hp; 6357d56d374SYoshinobu Inoue } 6367d56d374SYoshinobu Inoue 6377d56d374SYoshinobu Inoue /* 6387d56d374SYoshinobu Inoue * _hpmapv6: convert IPv4 hostent into IPv4-mapped IPv6 addresses 6397d56d374SYoshinobu Inoue */ 6407d56d374SYoshinobu Inoue #ifdef INET6 6417d56d374SYoshinobu Inoue static struct hostent * 6427d56d374SYoshinobu Inoue _hpmapv6(struct hostent *hp, int *errp) 6437d56d374SYoshinobu Inoue { 6447d56d374SYoshinobu Inoue struct hostent *hp6; 6457d56d374SYoshinobu Inoue 6467d56d374SYoshinobu Inoue if (hp == NULL) 6477d56d374SYoshinobu Inoue return NULL; 6487d56d374SYoshinobu Inoue if (hp->h_addrtype == AF_INET6) 6497d56d374SYoshinobu Inoue return hp; 6507d56d374SYoshinobu Inoue 6517d56d374SYoshinobu Inoue /* make dummy hostent to convert IPv6 address */ 6527d56d374SYoshinobu Inoue if ((hp6 = (struct hostent *)malloc(sizeof(struct hostent))) == NULL) { 6537d56d374SYoshinobu Inoue *errp = TRY_AGAIN; 6547d56d374SYoshinobu Inoue return NULL; 6557d56d374SYoshinobu Inoue } 6567d56d374SYoshinobu Inoue hp6->h_name = NULL; 6577d56d374SYoshinobu Inoue hp6->h_aliases = NULL; 6587d56d374SYoshinobu Inoue hp6->h_addrtype = AF_INET6; 6597d56d374SYoshinobu Inoue hp6->h_length = sizeof(struct in6_addr); 6607d56d374SYoshinobu Inoue hp6->h_addr_list = NULL; 6617d56d374SYoshinobu Inoue return _hpmerge(hp6, hp, errp); 6627d56d374SYoshinobu Inoue } 6637d56d374SYoshinobu Inoue #endif 6647d56d374SYoshinobu Inoue 6657d56d374SYoshinobu Inoue /* 6667d56d374SYoshinobu Inoue * _hpsort: sort address by sortlist 6677d56d374SYoshinobu Inoue */ 6687d56d374SYoshinobu Inoue static struct hostent * 6697d56d374SYoshinobu Inoue _hpsort(struct hostent *hp) 6707d56d374SYoshinobu Inoue { 6717d56d374SYoshinobu Inoue int i, j, n; 6727d56d374SYoshinobu Inoue u_char *ap, *sp, *mp, **pp; 6737d56d374SYoshinobu Inoue char t; 6747d56d374SYoshinobu Inoue char order[MAXADDRS]; 6757d56d374SYoshinobu Inoue int nsort = _res.nsort; 6767d56d374SYoshinobu Inoue 6777d56d374SYoshinobu Inoue if (hp == NULL || hp->h_addr_list[1] == NULL || nsort == 0) 6787d56d374SYoshinobu Inoue return hp; 6797d56d374SYoshinobu Inoue for (i = 0; (ap = (u_char *)hp->h_addr_list[i]); i++) { 6807d56d374SYoshinobu Inoue for (j = 0; j < nsort; j++) { 6817d56d374SYoshinobu Inoue #ifdef INET6 6827d56d374SYoshinobu Inoue if (_res_ext.sort_list[j].af != hp->h_addrtype) 6837d56d374SYoshinobu Inoue continue; 6847d56d374SYoshinobu Inoue sp = (u_char *)&_res_ext.sort_list[j].addr; 6857d56d374SYoshinobu Inoue mp = (u_char *)&_res_ext.sort_list[j].mask; 6867d56d374SYoshinobu Inoue #else 6877d56d374SYoshinobu Inoue sp = (u_char *)&_res.sort_list[j].addr; 6887d56d374SYoshinobu Inoue mp = (u_char *)&_res.sort_list[j].mask; 6897d56d374SYoshinobu Inoue #endif 6907d56d374SYoshinobu Inoue for (n = 0; n < hp->h_length; n++) { 6917d56d374SYoshinobu Inoue if ((ap[n] & mp[n]) != sp[n]) 6927d56d374SYoshinobu Inoue break; 6937d56d374SYoshinobu Inoue } 6947d56d374SYoshinobu Inoue if (n == hp->h_length) 6957d56d374SYoshinobu Inoue break; 6967d56d374SYoshinobu Inoue } 6977d56d374SYoshinobu Inoue order[i] = j; 6987d56d374SYoshinobu Inoue } 6997d56d374SYoshinobu Inoue n = i; 7007d56d374SYoshinobu Inoue pp = (u_char **)hp->h_addr_list; 7017d56d374SYoshinobu Inoue for (i = 0; i < n - 1; i++) { 7027d56d374SYoshinobu Inoue for (j = i + 1; j < n; j++) { 7037d56d374SYoshinobu Inoue if (order[i] > order[j]) { 7047d56d374SYoshinobu Inoue ap = pp[i]; 7057d56d374SYoshinobu Inoue pp[i] = pp[j]; 7067d56d374SYoshinobu Inoue pp[j] = ap; 7077d56d374SYoshinobu Inoue t = order[i]; 7087d56d374SYoshinobu Inoue order[i] = order[j]; 7097d56d374SYoshinobu Inoue order[j] = t; 7107d56d374SYoshinobu Inoue } 7117d56d374SYoshinobu Inoue } 7127d56d374SYoshinobu Inoue } 7137d56d374SYoshinobu Inoue return hp; 7147d56d374SYoshinobu Inoue } 7157d56d374SYoshinobu Inoue 7167d56d374SYoshinobu Inoue static char * 7177d56d374SYoshinobu Inoue _hgetword(char **pp) 7187d56d374SYoshinobu Inoue { 7197d56d374SYoshinobu Inoue char c, *p, *ret; 7207d56d374SYoshinobu Inoue const char *sp; 7217d56d374SYoshinobu Inoue static const char sep[] = "# \t\n"; 7227d56d374SYoshinobu Inoue 7237d56d374SYoshinobu Inoue ret = NULL; 7247d56d374SYoshinobu Inoue for (p = *pp; (c = *p) != '\0'; p++) { 7257d56d374SYoshinobu Inoue for (sp = sep; *sp != '\0'; sp++) { 7267d56d374SYoshinobu Inoue if (c == *sp) 7277d56d374SYoshinobu Inoue break; 7287d56d374SYoshinobu Inoue } 7297d56d374SYoshinobu Inoue if (c == '#') 7307d56d374SYoshinobu Inoue p[1] = '\0'; /* ignore rest of line */ 7317d56d374SYoshinobu Inoue if (ret == NULL) { 7327d56d374SYoshinobu Inoue if (*sp == '\0') 7337d56d374SYoshinobu Inoue ret = p; 7347d56d374SYoshinobu Inoue } else { 7357d56d374SYoshinobu Inoue if (*sp != '\0') { 7367d56d374SYoshinobu Inoue *p++ = '\0'; 7377d56d374SYoshinobu Inoue break; 7387d56d374SYoshinobu Inoue } 7397d56d374SYoshinobu Inoue } 7407d56d374SYoshinobu Inoue } 7417d56d374SYoshinobu Inoue *pp = p; 7427d56d374SYoshinobu Inoue if (ret == NULL || *ret == '\0') 7437d56d374SYoshinobu Inoue return NULL; 7447d56d374SYoshinobu Inoue return ret; 7457d56d374SYoshinobu Inoue } 7467d56d374SYoshinobu Inoue 7477d56d374SYoshinobu Inoue /* 7487d56d374SYoshinobu Inoue * FILES (/etc/hosts) 7497d56d374SYoshinobu Inoue */ 7507d56d374SYoshinobu Inoue 7517d56d374SYoshinobu Inoue static FILE * 7527d56d374SYoshinobu Inoue _files_open(int *errp) 7537d56d374SYoshinobu Inoue { 7547d56d374SYoshinobu Inoue FILE *fp; 7557d56d374SYoshinobu Inoue fp = fopen(_PATH_HOSTS, "r"); 7567d56d374SYoshinobu Inoue if (fp == NULL) 7577d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 7587d56d374SYoshinobu Inoue return fp; 7597d56d374SYoshinobu Inoue } 7607d56d374SYoshinobu Inoue 761248aee62SJacques Vidrine static int 762248aee62SJacques Vidrine _files_ghbyname(void *rval, void *cb_data, va_list ap) 7637d56d374SYoshinobu Inoue { 764248aee62SJacques Vidrine const char *name; 765248aee62SJacques Vidrine int af; 766248aee62SJacques Vidrine int *errp; 7677d56d374SYoshinobu Inoue int match, nalias; 7687d56d374SYoshinobu Inoue char *p, *line, *addrstr, *cname; 7697d56d374SYoshinobu Inoue FILE *fp; 7707d56d374SYoshinobu Inoue struct hostent *rethp, *hp, hpbuf; 7717d56d374SYoshinobu Inoue char *aliases[MAXALIASES + 1], *addrs[2]; 7727d56d374SYoshinobu Inoue union inx_addr addrbuf; 7737d56d374SYoshinobu Inoue char buf[BUFSIZ]; 774cb0600bdSJacques Vidrine int af0; 7757d56d374SYoshinobu Inoue 776248aee62SJacques Vidrine name = va_arg(ap, const char *); 777248aee62SJacques Vidrine af = va_arg(ap, int); 778248aee62SJacques Vidrine errp = va_arg(ap, int *); 779248aee62SJacques Vidrine 780248aee62SJacques Vidrine *(struct hostent **)rval = NULL; 781248aee62SJacques Vidrine 7827d56d374SYoshinobu Inoue if ((fp = _files_open(errp)) == NULL) 783248aee62SJacques Vidrine return NS_UNAVAIL; 7847d56d374SYoshinobu Inoue rethp = hp = NULL; 7857d56d374SYoshinobu Inoue 786cb0600bdSJacques Vidrine af0 = af; 7877d56d374SYoshinobu Inoue while (fgets(buf, sizeof(buf), fp)) { 7887d56d374SYoshinobu Inoue line = buf; 7897d56d374SYoshinobu Inoue if ((addrstr = _hgetword(&line)) == NULL 7907d56d374SYoshinobu Inoue || (cname = _hgetword(&line)) == NULL) 7917d56d374SYoshinobu Inoue continue; 7927d56d374SYoshinobu Inoue match = (strcasecmp(cname, name) == 0); 7937d56d374SYoshinobu Inoue nalias = 0; 7947d56d374SYoshinobu Inoue while ((p = _hgetword(&line)) != NULL) { 7957d56d374SYoshinobu Inoue if (!match) 7967d56d374SYoshinobu Inoue match = (strcasecmp(p, name) == 0); 7977d56d374SYoshinobu Inoue if (nalias < MAXALIASES) 7987d56d374SYoshinobu Inoue aliases[nalias++] = p; 7997d56d374SYoshinobu Inoue } 8007d56d374SYoshinobu Inoue if (!match) 8017d56d374SYoshinobu Inoue continue; 802e6f35403SYoshinobu Inoue switch (af0) { 803e6f35403SYoshinobu Inoue case AF_INET: 804e6f35403SYoshinobu Inoue if (inet_aton(addrstr, (struct in_addr *)&addrbuf) 805e6f35403SYoshinobu Inoue != 1) { 8067d56d374SYoshinobu Inoue *errp = NO_DATA; /* name found */ 8077d56d374SYoshinobu Inoue continue; 8087d56d374SYoshinobu Inoue } 809e6f35403SYoshinobu Inoue af = af0; 810e6f35403SYoshinobu Inoue break; 811e6f35403SYoshinobu Inoue #ifdef INET6 812e6f35403SYoshinobu Inoue case AF_INET6: 813e6f35403SYoshinobu Inoue if (inet_pton(af, addrstr, &addrbuf) != 1) { 814e6f35403SYoshinobu Inoue *errp = NO_DATA; /* name found */ 815e6f35403SYoshinobu Inoue continue; 816e6f35403SYoshinobu Inoue } 817e6f35403SYoshinobu Inoue af = af0; 818e6f35403SYoshinobu Inoue break; 819e6f35403SYoshinobu Inoue #endif 820e6f35403SYoshinobu Inoue case AF_UNSPEC: 821e6f35403SYoshinobu Inoue if (inet_aton(addrstr, (struct in_addr *)&addrbuf) 822e6f35403SYoshinobu Inoue == 1) { 823e6f35403SYoshinobu Inoue af = AF_INET; 824e6f35403SYoshinobu Inoue break; 825e6f35403SYoshinobu Inoue } 826e6f35403SYoshinobu Inoue #ifdef INET6 827e6f35403SYoshinobu Inoue if (inet_pton(AF_INET6, addrstr, &addrbuf) == 1) { 828e6f35403SYoshinobu Inoue af = AF_INET6; 829e6f35403SYoshinobu Inoue break; 830e6f35403SYoshinobu Inoue } 831e6f35403SYoshinobu Inoue #endif 832e6f35403SYoshinobu Inoue *errp = NO_DATA; /* name found */ 833e6f35403SYoshinobu Inoue continue; 834e6f35403SYoshinobu Inoue /* NOTREACHED */ 835e6f35403SYoshinobu Inoue } 8367d56d374SYoshinobu Inoue hp = &hpbuf; 8377d56d374SYoshinobu Inoue hp->h_name = cname; 8387d56d374SYoshinobu Inoue hp->h_aliases = aliases; 8397d56d374SYoshinobu Inoue aliases[nalias] = NULL; 8407d56d374SYoshinobu Inoue hp->h_addrtype = af; 8417d56d374SYoshinobu Inoue hp->h_length = ADDRLEN(af); 8427d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 8437d56d374SYoshinobu Inoue addrs[0] = (char *)&addrbuf; 8447d56d374SYoshinobu Inoue addrs[1] = NULL; 8457d56d374SYoshinobu Inoue hp = _hpcopy(hp, errp); 8467d56d374SYoshinobu Inoue rethp = _hpmerge(rethp, hp, errp); 8477d56d374SYoshinobu Inoue } 8487d56d374SYoshinobu Inoue fclose(fp); 849248aee62SJacques Vidrine *(struct hostent **)rval = rethp; 850248aee62SJacques Vidrine return (rethp != NULL) ? NS_SUCCESS : NS_NOTFOUND; 8517d56d374SYoshinobu Inoue } 8527d56d374SYoshinobu Inoue 853248aee62SJacques Vidrine static int 854248aee62SJacques Vidrine _files_ghbyaddr(void *rval, void *cb_data, va_list ap) 8557d56d374SYoshinobu Inoue { 856248aee62SJacques Vidrine const void *addr; 857248aee62SJacques Vidrine int addrlen; 858248aee62SJacques Vidrine int af; 859248aee62SJacques Vidrine int *errp; 8607d56d374SYoshinobu Inoue int nalias; 8617d56d374SYoshinobu Inoue char *p, *line; 8627d56d374SYoshinobu Inoue FILE *fp; 8637d56d374SYoshinobu Inoue struct hostent *hp, hpbuf; 8647d56d374SYoshinobu Inoue char *aliases[MAXALIASES + 1], *addrs[2]; 8657d56d374SYoshinobu Inoue union inx_addr addrbuf; 8667d56d374SYoshinobu Inoue char buf[BUFSIZ]; 8677d56d374SYoshinobu Inoue 868248aee62SJacques Vidrine addr = va_arg(ap, const void *); 869248aee62SJacques Vidrine addrlen = va_arg(ap, int); 870248aee62SJacques Vidrine af = va_arg(ap, int); 871248aee62SJacques Vidrine errp = va_arg(ap, int *); 872248aee62SJacques Vidrine 873248aee62SJacques Vidrine *(struct hostent**)rval = NULL; 874248aee62SJacques Vidrine 8757d56d374SYoshinobu Inoue if ((fp = _files_open(errp)) == NULL) 876248aee62SJacques Vidrine return NS_UNAVAIL; 8777d56d374SYoshinobu Inoue hp = NULL; 8787d56d374SYoshinobu Inoue while (fgets(buf, sizeof(buf), fp)) { 8797d56d374SYoshinobu Inoue line = buf; 8807d56d374SYoshinobu Inoue if ((p = _hgetword(&line)) == NULL 881be26adb5SYoshinobu Inoue || (af == AF_INET 882be26adb5SYoshinobu Inoue ? inet_aton(p, (struct in_addr *)&addrbuf) 883be26adb5SYoshinobu Inoue : inet_pton(af, p, &addrbuf)) != 1 8847d56d374SYoshinobu Inoue || memcmp(addr, &addrbuf, addrlen) != 0 8857d56d374SYoshinobu Inoue || (p = _hgetword(&line)) == NULL) 8867d56d374SYoshinobu Inoue continue; 8877d56d374SYoshinobu Inoue hp = &hpbuf; 8887d56d374SYoshinobu Inoue hp->h_name = p; 8897d56d374SYoshinobu Inoue hp->h_aliases = aliases; 8907d56d374SYoshinobu Inoue nalias = 0; 8917d56d374SYoshinobu Inoue while ((p = _hgetword(&line)) != NULL) { 8927d56d374SYoshinobu Inoue if (nalias < MAXALIASES) 8937d56d374SYoshinobu Inoue aliases[nalias++] = p; 8947d56d374SYoshinobu Inoue } 8957d56d374SYoshinobu Inoue aliases[nalias] = NULL; 8967d56d374SYoshinobu Inoue hp->h_addrtype = af; 8977d56d374SYoshinobu Inoue hp->h_length = addrlen; 8987d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 8997d56d374SYoshinobu Inoue addrs[0] = (char *)&addrbuf; 9007d56d374SYoshinobu Inoue addrs[1] = NULL; 9017d56d374SYoshinobu Inoue hp = _hpcopy(hp, errp); 9027d56d374SYoshinobu Inoue break; 9037d56d374SYoshinobu Inoue } 9047d56d374SYoshinobu Inoue fclose(fp); 905248aee62SJacques Vidrine *(struct hostent **)rval = hp; 906248aee62SJacques Vidrine return (hp != NULL) ? NS_SUCCESS : NS_NOTFOUND; 9077d56d374SYoshinobu Inoue } 9087d56d374SYoshinobu Inoue 90973b30f0cSJun-ichiro itojun Hagino #ifdef YP 91063858012SJonathan Lemon /* 91163858012SJonathan Lemon * NIS 91263858012SJonathan Lemon * 91363858012SJonathan Lemon * XXX actually a hack, these are INET4 specific. 91463858012SJonathan Lemon */ 915248aee62SJacques Vidrine static int 916248aee62SJacques Vidrine _nis_ghbyname(void *rval, void *cb_data, va_list ap) 91763858012SJonathan Lemon { 918248aee62SJacques Vidrine const char *name; 919248aee62SJacques Vidrine int af; 920248aee62SJacques Vidrine int *errp; 92138775c5eSJonathan Lemon struct hostent *hp = NULL; 92263858012SJonathan Lemon 923248aee62SJacques Vidrine name = va_arg(ap, const char *); 924248aee62SJacques Vidrine af = va_arg(ap, int); 925248aee62SJacques Vidrine errp = va_arg(ap, int *); 926248aee62SJacques Vidrine 927e6f35403SYoshinobu Inoue if (af == AF_UNSPEC) 928e6f35403SYoshinobu Inoue af = AF_INET; 92963858012SJonathan Lemon if (af == AF_INET) { 93063858012SJonathan Lemon hp = _gethostbynisname(name, af); 93163858012SJonathan Lemon if (hp != NULL) 93263858012SJonathan Lemon hp = _hpcopy(hp, errp); 93363858012SJonathan Lemon } 934248aee62SJacques Vidrine 935248aee62SJacques Vidrine *(struct hostent **)rval = hp; 936248aee62SJacques Vidrine return (hp != NULL) ? NS_SUCCESS : NS_NOTFOUND; 93763858012SJonathan Lemon 93863858012SJonathan Lemon } 93963858012SJonathan Lemon 940248aee62SJacques Vidrine static int 941248aee62SJacques Vidrine _nis_ghbyaddr(void *rval, void *cb_data, va_list ap) 94263858012SJonathan Lemon { 943248aee62SJacques Vidrine const void *addr; 944248aee62SJacques Vidrine int addrlen; 945248aee62SJacques Vidrine int af; 946248aee62SJacques Vidrine int *errp; 94763858012SJonathan Lemon struct hostent *hp = NULL; 94863858012SJonathan Lemon 949248aee62SJacques Vidrine addr = va_arg(ap, const void *); 950248aee62SJacques Vidrine addrlen = va_arg(ap, int); 951248aee62SJacques Vidrine af = va_arg(ap, int); 952248aee62SJacques Vidrine 95363858012SJonathan Lemon if (af == AF_INET) { 95463858012SJonathan Lemon hp = _gethostbynisaddr(addr, addrlen, af); 95563858012SJonathan Lemon if (hp != NULL) 95663858012SJonathan Lemon hp = _hpcopy(hp, errp); 95763858012SJonathan Lemon } 958248aee62SJacques Vidrine *(struct hostent **)rval = hp; 959248aee62SJacques Vidrine return (hp != NULL) ? NS_SUCCESS : NS_NOTFOUND; 96063858012SJonathan Lemon } 9617d56d374SYoshinobu Inoue #endif 9627d56d374SYoshinobu Inoue 963e6f35403SYoshinobu Inoue struct __res_type_list { 964e3975643SJake Burkholder SLIST_ENTRY(__res_type_list) rtl_entry; 965e6f35403SYoshinobu Inoue int rtl_type; 966e6f35403SYoshinobu Inoue }; 967e6f35403SYoshinobu Inoue 96873b30f0cSJun-ichiro itojun Hagino #if PACKETSZ > 1024 96973b30f0cSJun-ichiro itojun Hagino #define MAXPACKET PACKETSZ 97073b30f0cSJun-ichiro itojun Hagino #else 97173b30f0cSJun-ichiro itojun Hagino #define MAXPACKET 1024 97273b30f0cSJun-ichiro itojun Hagino #endif 97373b30f0cSJun-ichiro itojun Hagino 97473b30f0cSJun-ichiro itojun Hagino typedef union { 97573b30f0cSJun-ichiro itojun Hagino HEADER hdr; 97673b30f0cSJun-ichiro itojun Hagino u_char buf[MAXPACKET]; 97773b30f0cSJun-ichiro itojun Hagino } querybuf; 97873b30f0cSJun-ichiro itojun Hagino 97973b30f0cSJun-ichiro itojun Hagino static struct hostent *getanswer __P((const querybuf *, int, const char *, 98073b30f0cSJun-ichiro itojun Hagino int, struct hostent *, int *)); 98173b30f0cSJun-ichiro itojun Hagino 98273b30f0cSJun-ichiro itojun Hagino /* 98373b30f0cSJun-ichiro itojun Hagino * we don't need to take care about sorting, nor IPv4 mapped address here. 98473b30f0cSJun-ichiro itojun Hagino */ 9857d56d374SYoshinobu Inoue static struct hostent * 98673b30f0cSJun-ichiro itojun Hagino getanswer(answer, anslen, qname, qtype, template, errp) 98773b30f0cSJun-ichiro itojun Hagino const querybuf *answer; 988e6f35403SYoshinobu Inoue int anslen; 98973b30f0cSJun-ichiro itojun Hagino const char *qname; 990e6f35403SYoshinobu Inoue int qtype; 99173b30f0cSJun-ichiro itojun Hagino struct hostent *template; 992e6f35403SYoshinobu Inoue int *errp; 9937d56d374SYoshinobu Inoue { 99473b30f0cSJun-ichiro itojun Hagino register const HEADER *hp; 99573b30f0cSJun-ichiro itojun Hagino register const u_char *cp; 99673b30f0cSJun-ichiro itojun Hagino register int n; 99773b30f0cSJun-ichiro itojun Hagino const u_char *eom, *erdata; 99873b30f0cSJun-ichiro itojun Hagino char *bp, **ap, **hap; 99973b30f0cSJun-ichiro itojun Hagino int type, class, buflen, ancount, qdcount; 100073b30f0cSJun-ichiro itojun Hagino int haveanswer, had_error; 100173b30f0cSJun-ichiro itojun Hagino char tbuf[MAXDNAME]; 100273b30f0cSJun-ichiro itojun Hagino const char *tname; 100373b30f0cSJun-ichiro itojun Hagino int (*name_ok) __P((const char *)); 100473b30f0cSJun-ichiro itojun Hagino static char *h_addr_ptrs[MAXADDRS + 1]; 100573b30f0cSJun-ichiro itojun Hagino static char *host_aliases[MAXALIASES]; 100673b30f0cSJun-ichiro itojun Hagino static char hostbuf[8*1024]; 10077d56d374SYoshinobu Inoue 100873b30f0cSJun-ichiro itojun Hagino #define BOUNDED_INCR(x) \ 100973b30f0cSJun-ichiro itojun Hagino do { \ 101073b30f0cSJun-ichiro itojun Hagino cp += x; \ 101173b30f0cSJun-ichiro itojun Hagino if (cp > eom) { \ 101273b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; \ 101373b30f0cSJun-ichiro itojun Hagino return (NULL); \ 101473b30f0cSJun-ichiro itojun Hagino } \ 101573b30f0cSJun-ichiro itojun Hagino } while (0) 10167d56d374SYoshinobu Inoue 101773b30f0cSJun-ichiro itojun Hagino #define BOUNDS_CHECK(ptr, count) \ 101873b30f0cSJun-ichiro itojun Hagino do { \ 101973b30f0cSJun-ichiro itojun Hagino if ((ptr) + (count) > eom) { \ 102073b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; \ 102173b30f0cSJun-ichiro itojun Hagino return (NULL); \ 102273b30f0cSJun-ichiro itojun Hagino } \ 102373b30f0cSJun-ichiro itojun Hagino } while (0) 102473b30f0cSJun-ichiro itojun Hagino 10253f587e57SKris Kennaway /* XXX do {} while (0) cannot be put here */ 102673b30f0cSJun-ichiro itojun Hagino #define DNS_ASSERT(x) \ 10273f587e57SKris Kennaway { \ 102873b30f0cSJun-ichiro itojun Hagino if (!(x)) { \ 102973b30f0cSJun-ichiro itojun Hagino cp += n; \ 103073b30f0cSJun-ichiro itojun Hagino continue; \ 103173b30f0cSJun-ichiro itojun Hagino } \ 10323f587e57SKris Kennaway } 103373b30f0cSJun-ichiro itojun Hagino 10343f587e57SKris Kennaway /* XXX do {} while (0) cannot be put here */ 103573b30f0cSJun-ichiro itojun Hagino #define DNS_FATAL(x) \ 10363f587e57SKris Kennaway { \ 103773b30f0cSJun-ichiro itojun Hagino if (!(x)) { \ 103873b30f0cSJun-ichiro itojun Hagino had_error++; \ 103973b30f0cSJun-ichiro itojun Hagino continue; \ 104073b30f0cSJun-ichiro itojun Hagino } \ 10413f587e57SKris Kennaway } 104273b30f0cSJun-ichiro itojun Hagino 104373b30f0cSJun-ichiro itojun Hagino tname = qname; 104473b30f0cSJun-ichiro itojun Hagino template->h_name = NULL; 104573b30f0cSJun-ichiro itojun Hagino eom = answer->buf + anslen; 104673b30f0cSJun-ichiro itojun Hagino switch (qtype) { 10477d56d374SYoshinobu Inoue case T_A: 10487d56d374SYoshinobu Inoue case T_AAAA: 104973b30f0cSJun-ichiro itojun Hagino name_ok = res_hnok; 105073b30f0cSJun-ichiro itojun Hagino break; 105173b30f0cSJun-ichiro itojun Hagino case T_PTR: 105273b30f0cSJun-ichiro itojun Hagino name_ok = res_dnok; 10537d56d374SYoshinobu Inoue break; 10547d56d374SYoshinobu Inoue default: 105573b30f0cSJun-ichiro itojun Hagino return (NULL); /* XXX should be abort(); */ 105673b30f0cSJun-ichiro itojun Hagino } 105773b30f0cSJun-ichiro itojun Hagino /* 105873b30f0cSJun-ichiro itojun Hagino * find first satisfactory answer 105973b30f0cSJun-ichiro itojun Hagino */ 106073b30f0cSJun-ichiro itojun Hagino hp = &answer->hdr; 106173b30f0cSJun-ichiro itojun Hagino ancount = ntohs(hp->ancount); 106273b30f0cSJun-ichiro itojun Hagino qdcount = ntohs(hp->qdcount); 106373b30f0cSJun-ichiro itojun Hagino bp = hostbuf; 106473b30f0cSJun-ichiro itojun Hagino buflen = sizeof hostbuf; 106573b30f0cSJun-ichiro itojun Hagino cp = answer->buf; 106673b30f0cSJun-ichiro itojun Hagino BOUNDED_INCR(HFIXEDSZ); 106773b30f0cSJun-ichiro itojun Hagino if (qdcount != 1) { 106873b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 106973b30f0cSJun-ichiro itojun Hagino return (NULL); 107073b30f0cSJun-ichiro itojun Hagino } 107173b30f0cSJun-ichiro itojun Hagino n = dn_expand(answer->buf, eom, cp, bp, buflen); 107273b30f0cSJun-ichiro itojun Hagino if ((n < 0) || !(*name_ok)(bp)) { 107373b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 107473b30f0cSJun-ichiro itojun Hagino return (NULL); 107573b30f0cSJun-ichiro itojun Hagino } 107673b30f0cSJun-ichiro itojun Hagino BOUNDED_INCR(n + QFIXEDSZ); 107773b30f0cSJun-ichiro itojun Hagino if (qtype == T_A || qtype == T_AAAA) { 107873b30f0cSJun-ichiro itojun Hagino /* res_send() has already verified that the query name is the 107973b30f0cSJun-ichiro itojun Hagino * same as the one we sent; this just gets the expanded name 108073b30f0cSJun-ichiro itojun Hagino * (i.e., with the succeeding search-domain tacked on). 108173b30f0cSJun-ichiro itojun Hagino */ 108273b30f0cSJun-ichiro itojun Hagino n = strlen(bp) + 1; /* for the \0 */ 108373b30f0cSJun-ichiro itojun Hagino if (n >= MAXHOSTNAMELEN) { 108473b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 108573b30f0cSJun-ichiro itojun Hagino return (NULL); 108673b30f0cSJun-ichiro itojun Hagino } 108773b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 108873b30f0cSJun-ichiro itojun Hagino bp += n; 108973b30f0cSJun-ichiro itojun Hagino buflen -= n; 109073b30f0cSJun-ichiro itojun Hagino /* The qname can be abbreviated, but h_name is now absolute. */ 109173b30f0cSJun-ichiro itojun Hagino qname = template->h_name; 109273b30f0cSJun-ichiro itojun Hagino } 109373b30f0cSJun-ichiro itojun Hagino ap = host_aliases; 109473b30f0cSJun-ichiro itojun Hagino *ap = NULL; 109573b30f0cSJun-ichiro itojun Hagino template->h_aliases = host_aliases; 109673b30f0cSJun-ichiro itojun Hagino hap = h_addr_ptrs; 109773b30f0cSJun-ichiro itojun Hagino *hap = NULL; 109873b30f0cSJun-ichiro itojun Hagino template->h_addr_list = h_addr_ptrs; 109973b30f0cSJun-ichiro itojun Hagino haveanswer = 0; 110073b30f0cSJun-ichiro itojun Hagino had_error = 0; 110173b30f0cSJun-ichiro itojun Hagino while (ancount-- > 0 && cp < eom && !had_error) { 110273b30f0cSJun-ichiro itojun Hagino n = dn_expand(answer->buf, eom, cp, bp, buflen); 110373b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n >= 0); 110473b30f0cSJun-ichiro itojun Hagino DNS_FATAL((*name_ok)(bp)); 110573b30f0cSJun-ichiro itojun Hagino cp += n; /* name */ 110673b30f0cSJun-ichiro itojun Hagino BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ); 110773b30f0cSJun-ichiro itojun Hagino type = _getshort(cp); 110873b30f0cSJun-ichiro itojun Hagino cp += INT16SZ; /* type */ 110973b30f0cSJun-ichiro itojun Hagino class = _getshort(cp); 111073b30f0cSJun-ichiro itojun Hagino cp += INT16SZ + INT32SZ; /* class, TTL */ 111173b30f0cSJun-ichiro itojun Hagino n = _getshort(cp); 111273b30f0cSJun-ichiro itojun Hagino cp += INT16SZ; /* len */ 111373b30f0cSJun-ichiro itojun Hagino BOUNDS_CHECK(cp, n); 111473b30f0cSJun-ichiro itojun Hagino erdata = cp + n; 111573b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(class == C_IN); 111673b30f0cSJun-ichiro itojun Hagino if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) { 111773b30f0cSJun-ichiro itojun Hagino if (ap >= &host_aliases[MAXALIASES-1]) 111873b30f0cSJun-ichiro itojun Hagino continue; 111973b30f0cSJun-ichiro itojun Hagino n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf); 112073b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n >= 0); 112173b30f0cSJun-ichiro itojun Hagino DNS_FATAL((*name_ok)(tbuf)); 11227d56d374SYoshinobu Inoue cp += n; 112373b30f0cSJun-ichiro itojun Hagino if (cp != erdata) { 112473b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 112573b30f0cSJun-ichiro itojun Hagino return (NULL); 112673b30f0cSJun-ichiro itojun Hagino } 112773b30f0cSJun-ichiro itojun Hagino /* Store alias. */ 112873b30f0cSJun-ichiro itojun Hagino *ap++ = bp; 112973b30f0cSJun-ichiro itojun Hagino n = strlen(bp) + 1; /* for the \0 */ 113073b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n < MAXHOSTNAMELEN); 113173b30f0cSJun-ichiro itojun Hagino bp += n; 113273b30f0cSJun-ichiro itojun Hagino buflen -= n; 113373b30f0cSJun-ichiro itojun Hagino /* Get canonical name. */ 113473b30f0cSJun-ichiro itojun Hagino n = strlen(tbuf) + 1; /* for the \0 */ 113573b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n <= buflen); 113673b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n < MAXHOSTNAMELEN); 113773b30f0cSJun-ichiro itojun Hagino strcpy(bp, tbuf); 113873b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 113973b30f0cSJun-ichiro itojun Hagino bp += n; 114073b30f0cSJun-ichiro itojun Hagino buflen -= n; 114173b30f0cSJun-ichiro itojun Hagino continue; 114273b30f0cSJun-ichiro itojun Hagino } 114373b30f0cSJun-ichiro itojun Hagino if (qtype == T_PTR && type == T_CNAME) { 114473b30f0cSJun-ichiro itojun Hagino n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf); 114573b30f0cSJun-ichiro itojun Hagino if (n < 0 || !res_dnok(tbuf)) { 114673b30f0cSJun-ichiro itojun Hagino had_error++; 114773b30f0cSJun-ichiro itojun Hagino continue; 114873b30f0cSJun-ichiro itojun Hagino } 114973b30f0cSJun-ichiro itojun Hagino cp += n; 115073b30f0cSJun-ichiro itojun Hagino if (cp != erdata) { 115173b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 115273b30f0cSJun-ichiro itojun Hagino return (NULL); 115373b30f0cSJun-ichiro itojun Hagino } 115473b30f0cSJun-ichiro itojun Hagino /* Get canonical name. */ 115573b30f0cSJun-ichiro itojun Hagino n = strlen(tbuf) + 1; /* for the \0 */ 115673b30f0cSJun-ichiro itojun Hagino if (n > buflen || n >= MAXHOSTNAMELEN) { 115773b30f0cSJun-ichiro itojun Hagino had_error++; 115873b30f0cSJun-ichiro itojun Hagino continue; 115973b30f0cSJun-ichiro itojun Hagino } 116073b30f0cSJun-ichiro itojun Hagino strcpy(bp, tbuf); 11613f587e57SKris Kennaway tname = bp; 116273b30f0cSJun-ichiro itojun Hagino bp += n; 116373b30f0cSJun-ichiro itojun Hagino buflen -= n; 116473b30f0cSJun-ichiro itojun Hagino continue; 116573b30f0cSJun-ichiro itojun Hagino } 116673b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(type == qtype); 116773b30f0cSJun-ichiro itojun Hagino switch (type) { 116873b30f0cSJun-ichiro itojun Hagino case T_PTR: 116973b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(strcasecmp(tname, bp) == 0); 117073b30f0cSJun-ichiro itojun Hagino n = dn_expand(answer->buf, eom, cp, bp, buflen); 117173b30f0cSJun-ichiro itojun Hagino DNS_FATAL(n >= 0); 117273b30f0cSJun-ichiro itojun Hagino DNS_FATAL(res_hnok(bp)); 117373b30f0cSJun-ichiro itojun Hagino #if MULTI_PTRS_ARE_ALIASES 117473b30f0cSJun-ichiro itojun Hagino cp += n; 117573b30f0cSJun-ichiro itojun Hagino if (cp != erdata) { 117673b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 117773b30f0cSJun-ichiro itojun Hagino return (NULL); 117873b30f0cSJun-ichiro itojun Hagino } 117973b30f0cSJun-ichiro itojun Hagino if (!haveanswer) 118073b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 118173b30f0cSJun-ichiro itojun Hagino else if (ap < &host_aliases[MAXALIASES-1]) 118273b30f0cSJun-ichiro itojun Hagino *ap++ = bp; 118373b30f0cSJun-ichiro itojun Hagino else 118473b30f0cSJun-ichiro itojun Hagino n = -1; 118573b30f0cSJun-ichiro itojun Hagino if (n != -1) { 118673b30f0cSJun-ichiro itojun Hagino n = strlen(bp) + 1; /* for the \0 */ 118773b30f0cSJun-ichiro itojun Hagino if (n >= MAXHOSTNAMELEN) { 118873b30f0cSJun-ichiro itojun Hagino had_error++; 11897d56d374SYoshinobu Inoue break; 11907d56d374SYoshinobu Inoue } 119173b30f0cSJun-ichiro itojun Hagino bp += n; 119273b30f0cSJun-ichiro itojun Hagino buflen -= n; 11937d56d374SYoshinobu Inoue } 119473b30f0cSJun-ichiro itojun Hagino break; 119573b30f0cSJun-ichiro itojun Hagino #else 119673b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 119773b30f0cSJun-ichiro itojun Hagino *errp = NETDB_SUCCESS; 119873b30f0cSJun-ichiro itojun Hagino return (template); 119973b30f0cSJun-ichiro itojun Hagino #endif 120073b30f0cSJun-ichiro itojun Hagino case T_A: 120173b30f0cSJun-ichiro itojun Hagino case T_AAAA: 120273b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(strcasecmp(template->h_name, bp) == 0); 120373b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(n == template->h_length); 120473b30f0cSJun-ichiro itojun Hagino if (!haveanswer) { 120573b30f0cSJun-ichiro itojun Hagino register int nn; 120673b30f0cSJun-ichiro itojun Hagino 120773b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 120873b30f0cSJun-ichiro itojun Hagino nn = strlen(bp) + 1; /* for the \0 */ 120973b30f0cSJun-ichiro itojun Hagino bp += nn; 121073b30f0cSJun-ichiro itojun Hagino buflen -= nn; 121173b30f0cSJun-ichiro itojun Hagino } 121273b30f0cSJun-ichiro itojun Hagino bp = (char *)ALIGN(bp); 121373b30f0cSJun-ichiro itojun Hagino 121473b30f0cSJun-ichiro itojun Hagino DNS_FATAL(bp + n < &hostbuf[sizeof hostbuf]); 121573b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(hap < &h_addr_ptrs[MAXADDRS-1]); 121673b30f0cSJun-ichiro itojun Hagino #ifdef FILTER_V4MAPPED 121773b30f0cSJun-ichiro itojun Hagino if (type == T_AAAA) { 121873b30f0cSJun-ichiro itojun Hagino struct in6_addr in6; 121973b30f0cSJun-ichiro itojun Hagino memcpy(&in6, cp, sizeof(in6)); 122073b30f0cSJun-ichiro itojun Hagino DNS_ASSERT(IN6_IS_ADDR_V4MAPPED(&in6) == 0); 122173b30f0cSJun-ichiro itojun Hagino } 122273b30f0cSJun-ichiro itojun Hagino #endif 122373b30f0cSJun-ichiro itojun Hagino bcopy(cp, *hap++ = bp, n); 122473b30f0cSJun-ichiro itojun Hagino bp += n; 122573b30f0cSJun-ichiro itojun Hagino buflen -= n; 122673b30f0cSJun-ichiro itojun Hagino cp += n; 122773b30f0cSJun-ichiro itojun Hagino if (cp != erdata) { 12287d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 122973b30f0cSJun-ichiro itojun Hagino return (NULL); 12307d56d374SYoshinobu Inoue } 123173b30f0cSJun-ichiro itojun Hagino break; 123273b30f0cSJun-ichiro itojun Hagino default: 123373b30f0cSJun-ichiro itojun Hagino abort(); 123473b30f0cSJun-ichiro itojun Hagino } 123573b30f0cSJun-ichiro itojun Hagino if (!had_error) 123673b30f0cSJun-ichiro itojun Hagino haveanswer++; 123773b30f0cSJun-ichiro itojun Hagino } 123873b30f0cSJun-ichiro itojun Hagino if (haveanswer) { 123973b30f0cSJun-ichiro itojun Hagino *ap = NULL; 124073b30f0cSJun-ichiro itojun Hagino *hap = NULL; 124173b30f0cSJun-ichiro itojun Hagino if (!template->h_name) { 124273b30f0cSJun-ichiro itojun Hagino n = strlen(qname) + 1; /* for the \0 */ 124373b30f0cSJun-ichiro itojun Hagino if (n > buflen || n >= MAXHOSTNAMELEN) 124473b30f0cSJun-ichiro itojun Hagino goto no_recovery; 124573b30f0cSJun-ichiro itojun Hagino strcpy(bp, qname); 124673b30f0cSJun-ichiro itojun Hagino template->h_name = bp; 124773b30f0cSJun-ichiro itojun Hagino bp += n; 124873b30f0cSJun-ichiro itojun Hagino buflen -= n; 124973b30f0cSJun-ichiro itojun Hagino } 125073b30f0cSJun-ichiro itojun Hagino *errp = NETDB_SUCCESS; 125173b30f0cSJun-ichiro itojun Hagino return (template); 125273b30f0cSJun-ichiro itojun Hagino } 125373b30f0cSJun-ichiro itojun Hagino no_recovery: 125473b30f0cSJun-ichiro itojun Hagino *errp = NO_RECOVERY; 125573b30f0cSJun-ichiro itojun Hagino return (NULL); 125673b30f0cSJun-ichiro itojun Hagino 125773b30f0cSJun-ichiro itojun Hagino #undef BOUNDED_INCR 125873b30f0cSJun-ichiro itojun Hagino #undef BOUNDS_CHECK 125973b30f0cSJun-ichiro itojun Hagino #undef DNS_ASSERT 126073b30f0cSJun-ichiro itojun Hagino #undef DNS_FATAL 12617d56d374SYoshinobu Inoue } 12627d56d374SYoshinobu Inoue 1263e6f35403SYoshinobu Inoue /* res_search() variant with multiple query support. */ 1264e6f35403SYoshinobu Inoue static struct hostent * 1265e6f35403SYoshinobu Inoue _res_search_multi(name, rtl, errp) 1266e6f35403SYoshinobu Inoue const char *name; /* domain name */ 1267e6f35403SYoshinobu Inoue struct __res_type_list *rtl; /* list of query types */ 1268e6f35403SYoshinobu Inoue int *errp; 1269e6f35403SYoshinobu Inoue { 1270e6f35403SYoshinobu Inoue const char *cp, * const *domain; 1271e6f35403SYoshinobu Inoue struct hostent *hp0 = NULL, *hp; 127273b30f0cSJun-ichiro itojun Hagino struct hostent hpbuf; 1273e6f35403SYoshinobu Inoue u_int dots; 1274e6f35403SYoshinobu Inoue int trailing_dot, ret, saved_herrno; 1275e6f35403SYoshinobu Inoue int got_nodata = 0, got_servfail = 0, tried_as_is = 0; 1276e6f35403SYoshinobu Inoue struct __res_type_list *rtl0 = rtl; 127773b30f0cSJun-ichiro itojun Hagino querybuf buf; 1278e6f35403SYoshinobu Inoue 1279e6f35403SYoshinobu Inoue if ((_res.options & RES_INIT) == 0 && res_init() == -1) { 1280e6f35403SYoshinobu Inoue *errp = NETDB_INTERNAL; 1281e6f35403SYoshinobu Inoue return (NULL); 1282e6f35403SYoshinobu Inoue } 1283e6f35403SYoshinobu Inoue dots = 0; 1284e6f35403SYoshinobu Inoue for (cp = name; *cp; cp++) 1285e6f35403SYoshinobu Inoue dots += (*cp == '.'); 1286e6f35403SYoshinobu Inoue trailing_dot = 0; 1287e6f35403SYoshinobu Inoue if (cp > name && *--cp == '.') 1288e6f35403SYoshinobu Inoue trailing_dot++; 1289e6f35403SYoshinobu Inoue 1290e6f35403SYoshinobu Inoue /* If there aren't any dots, it could be a user-level alias */ 1291e6f35403SYoshinobu Inoue if (!dots && (cp = hostalias(name)) != NULL) { 1292e6f35403SYoshinobu Inoue for(rtl = rtl0; rtl != NULL; 1293e6f35403SYoshinobu Inoue rtl = SLIST_NEXT(rtl, rtl_entry)) { 129473b30f0cSJun-ichiro itojun Hagino ret = res_query(cp, C_IN, rtl->rtl_type, buf.buf, 129573b30f0cSJun-ichiro itojun Hagino sizeof(buf.buf)); 1296e6f35403SYoshinobu Inoue if (ret > 0) { 129773b30f0cSJun-ichiro itojun Hagino hpbuf.h_addrtype = (rtl->rtl_type == T_AAAA) 129873b30f0cSJun-ichiro itojun Hagino ? AF_INET6 : AF_INET; 129973b30f0cSJun-ichiro itojun Hagino hpbuf.h_length = ADDRLEN(hpbuf.h_addrtype); 130073b30f0cSJun-ichiro itojun Hagino hp = getanswer(&buf, ret, name, rtl->rtl_type, 130173b30f0cSJun-ichiro itojun Hagino &hpbuf, errp); 13023f587e57SKris Kennaway if (!hp) 13033f587e57SKris Kennaway continue; 130473b30f0cSJun-ichiro itojun Hagino hp = _hpcopy(&hpbuf, errp); 1305e6f35403SYoshinobu Inoue hp0 = _hpmerge(hp0, hp, errp); 1306e6f35403SYoshinobu Inoue } 1307e6f35403SYoshinobu Inoue } 1308e6f35403SYoshinobu Inoue return (hp0); 1309e6f35403SYoshinobu Inoue } 1310e6f35403SYoshinobu Inoue 1311e6f35403SYoshinobu Inoue /* 1312e6f35403SYoshinobu Inoue * If there are dots in the name already, let's just give it a try 1313e6f35403SYoshinobu Inoue * 'as is'. The threshold can be set with the "ndots" option. 1314e6f35403SYoshinobu Inoue */ 1315e6f35403SYoshinobu Inoue saved_herrno = -1; 1316e6f35403SYoshinobu Inoue if (dots >= _res.ndots) { 1317e6f35403SYoshinobu Inoue for(rtl = rtl0; rtl != NULL; 1318e6f35403SYoshinobu Inoue rtl = SLIST_NEXT(rtl, rtl_entry)) { 1319e6f35403SYoshinobu Inoue ret = res_querydomain(name, NULL, C_IN, rtl->rtl_type, 132073b30f0cSJun-ichiro itojun Hagino buf.buf, sizeof(buf.buf)); 1321e6f35403SYoshinobu Inoue if (ret > 0) { 132273b30f0cSJun-ichiro itojun Hagino hpbuf.h_addrtype = (rtl->rtl_type == T_AAAA) 132373b30f0cSJun-ichiro itojun Hagino ? AF_INET6 : AF_INET; 132473b30f0cSJun-ichiro itojun Hagino hpbuf.h_length = ADDRLEN(hpbuf.h_addrtype); 132573b30f0cSJun-ichiro itojun Hagino hp = getanswer(&buf, ret, name, rtl->rtl_type, 132673b30f0cSJun-ichiro itojun Hagino &hpbuf, errp); 13273f587e57SKris Kennaway if (!hp) 13283f587e57SKris Kennaway continue; 132973b30f0cSJun-ichiro itojun Hagino hp = _hpcopy(&hpbuf, errp); 1330e6f35403SYoshinobu Inoue hp0 = _hpmerge(hp0, hp, errp); 1331e6f35403SYoshinobu Inoue } 1332e6f35403SYoshinobu Inoue } 1333e6f35403SYoshinobu Inoue if (hp0 != NULL) 1334e6f35403SYoshinobu Inoue return (hp0); 1335e6f35403SYoshinobu Inoue saved_herrno = *errp; 1336e6f35403SYoshinobu Inoue tried_as_is++; 1337e6f35403SYoshinobu Inoue } 1338e6f35403SYoshinobu Inoue 1339e6f35403SYoshinobu Inoue /* 1340e6f35403SYoshinobu Inoue * We do at least one level of search if 1341e6f35403SYoshinobu Inoue * - there is no dot and RES_DEFNAME is set, or 1342e6f35403SYoshinobu Inoue * - there is at least one dot, there is no trailing dot, 1343e6f35403SYoshinobu Inoue * and RES_DNSRCH is set. 1344e6f35403SYoshinobu Inoue */ 1345e6f35403SYoshinobu Inoue if ((!dots && (_res.options & RES_DEFNAMES)) || 1346e6f35403SYoshinobu Inoue (dots && !trailing_dot && (_res.options & RES_DNSRCH))) { 1347e6f35403SYoshinobu Inoue int done = 0; 1348e6f35403SYoshinobu Inoue 1349e6f35403SYoshinobu Inoue for (domain = (const char * const *)_res.dnsrch; 1350e6f35403SYoshinobu Inoue *domain && !done; 1351e6f35403SYoshinobu Inoue domain++) { 1352e6f35403SYoshinobu Inoue 1353e6f35403SYoshinobu Inoue for(rtl = rtl0; rtl != NULL; 1354e6f35403SYoshinobu Inoue rtl = SLIST_NEXT(rtl, rtl_entry)) { 1355e6f35403SYoshinobu Inoue ret = res_querydomain(name, *domain, C_IN, 1356e6f35403SYoshinobu Inoue rtl->rtl_type, 135773b30f0cSJun-ichiro itojun Hagino buf.buf, sizeof(buf.buf)); 1358e6f35403SYoshinobu Inoue if (ret > 0) { 135973b30f0cSJun-ichiro itojun Hagino hpbuf.h_addrtype = (rtl->rtl_type == T_AAAA) 136073b30f0cSJun-ichiro itojun Hagino ? AF_INET6 : AF_INET; 136173b30f0cSJun-ichiro itojun Hagino hpbuf.h_length = ADDRLEN(hpbuf.h_addrtype); 136273b30f0cSJun-ichiro itojun Hagino hp = getanswer(&buf, ret, name, 136373b30f0cSJun-ichiro itojun Hagino rtl->rtl_type, &hpbuf, errp); 13643f587e57SKris Kennaway if (!hp) 13653f587e57SKris Kennaway continue; 136673b30f0cSJun-ichiro itojun Hagino hp = _hpcopy(&hpbuf, errp); 1367e6f35403SYoshinobu Inoue hp0 = _hpmerge(hp0, hp, errp); 1368e6f35403SYoshinobu Inoue } 1369e6f35403SYoshinobu Inoue } 1370e6f35403SYoshinobu Inoue if (hp0 != NULL) 1371e6f35403SYoshinobu Inoue return (hp0); 1372e6f35403SYoshinobu Inoue 1373e6f35403SYoshinobu Inoue /* 1374e6f35403SYoshinobu Inoue * If no server present, give up. 1375e6f35403SYoshinobu Inoue * If name isn't found in this domain, 1376e6f35403SYoshinobu Inoue * keep trying higher domains in the search list 1377e6f35403SYoshinobu Inoue * (if that's enabled). 1378e6f35403SYoshinobu Inoue * On a NO_DATA error, keep trying, otherwise 1379e6f35403SYoshinobu Inoue * a wildcard entry of another type could keep us 1380e6f35403SYoshinobu Inoue * from finding this entry higher in the domain. 1381e6f35403SYoshinobu Inoue * If we get some other error (negative answer or 1382e6f35403SYoshinobu Inoue * server failure), then stop searching up, 1383e6f35403SYoshinobu Inoue * but try the input name below in case it's 1384e6f35403SYoshinobu Inoue * fully-qualified. 1385e6f35403SYoshinobu Inoue */ 1386e6f35403SYoshinobu Inoue if (errno == ECONNREFUSED) { 1387e6f35403SYoshinobu Inoue *errp = TRY_AGAIN; 1388e6f35403SYoshinobu Inoue return (NULL); 1389e6f35403SYoshinobu Inoue } 1390e6f35403SYoshinobu Inoue 1391e6f35403SYoshinobu Inoue switch (*errp) { 1392e6f35403SYoshinobu Inoue case NO_DATA: 1393e6f35403SYoshinobu Inoue got_nodata++; 1394e6f35403SYoshinobu Inoue /* FALLTHROUGH */ 1395e6f35403SYoshinobu Inoue case HOST_NOT_FOUND: 1396e6f35403SYoshinobu Inoue /* keep trying */ 1397e6f35403SYoshinobu Inoue break; 1398e6f35403SYoshinobu Inoue case TRY_AGAIN: 139973b30f0cSJun-ichiro itojun Hagino if (buf.hdr.rcode == SERVFAIL) { 1400e6f35403SYoshinobu Inoue /* try next search element, if any */ 1401e6f35403SYoshinobu Inoue got_servfail++; 1402e6f35403SYoshinobu Inoue break; 1403e6f35403SYoshinobu Inoue } 1404e6f35403SYoshinobu Inoue /* FALLTHROUGH */ 1405e6f35403SYoshinobu Inoue default: 1406e6f35403SYoshinobu Inoue /* anything else implies that we're done */ 1407e6f35403SYoshinobu Inoue done++; 1408e6f35403SYoshinobu Inoue } 1409e6f35403SYoshinobu Inoue 1410e6f35403SYoshinobu Inoue /* if we got here for some reason other than DNSRCH, 1411e6f35403SYoshinobu Inoue * we only wanted one iteration of the loop, so stop. 1412e6f35403SYoshinobu Inoue */ 1413e6f35403SYoshinobu Inoue if (!(_res.options & RES_DNSRCH)) 1414e6f35403SYoshinobu Inoue done++; 1415e6f35403SYoshinobu Inoue } 1416e6f35403SYoshinobu Inoue } 1417e6f35403SYoshinobu Inoue 1418e6f35403SYoshinobu Inoue /* 1419e6f35403SYoshinobu Inoue * If we have not already tried the name "as is", do that now. 1420e6f35403SYoshinobu Inoue * note that we do this regardless of how many dots were in the 1421e6f35403SYoshinobu Inoue * name or whether it ends with a dot unless NOTLDQUERY is set. 1422e6f35403SYoshinobu Inoue */ 1423e6f35403SYoshinobu Inoue if (!tried_as_is && (dots || !(_res.options & RES_NOTLDQUERY))) { 1424e6f35403SYoshinobu Inoue for(rtl = rtl0; rtl != NULL; 1425e6f35403SYoshinobu Inoue rtl = SLIST_NEXT(rtl, rtl_entry)) { 1426e6f35403SYoshinobu Inoue ret = res_querydomain(name, NULL, C_IN, rtl->rtl_type, 142773b30f0cSJun-ichiro itojun Hagino buf.buf, sizeof(buf.buf)); 1428e6f35403SYoshinobu Inoue if (ret > 0) { 142973b30f0cSJun-ichiro itojun Hagino hpbuf.h_addrtype = (rtl->rtl_type == T_AAAA) 143073b30f0cSJun-ichiro itojun Hagino ? AF_INET6 : AF_INET; 143173b30f0cSJun-ichiro itojun Hagino hpbuf.h_length = ADDRLEN(hpbuf.h_addrtype); 143273b30f0cSJun-ichiro itojun Hagino hp = getanswer(&buf, ret, name, rtl->rtl_type, 143373b30f0cSJun-ichiro itojun Hagino &hpbuf, errp); 14343f587e57SKris Kennaway if (!hp) 14353f587e57SKris Kennaway continue; 143673b30f0cSJun-ichiro itojun Hagino hp = _hpcopy(&hpbuf, errp); 1437e6f35403SYoshinobu Inoue hp0 = _hpmerge(hp0, hp, errp); 1438e6f35403SYoshinobu Inoue } 1439e6f35403SYoshinobu Inoue } 1440e6f35403SYoshinobu Inoue if (hp0 != NULL) 1441e6f35403SYoshinobu Inoue return (hp0); 1442e6f35403SYoshinobu Inoue } 1443e6f35403SYoshinobu Inoue 1444e6f35403SYoshinobu Inoue /* if we got here, we didn't satisfy the search. 1445e6f35403SYoshinobu Inoue * if we did an initial full query, return that query's h_errno 1446e6f35403SYoshinobu Inoue * (note that we wouldn't be here if that query had succeeded). 1447e6f35403SYoshinobu Inoue * else if we ever got a nodata, send that back as the reason. 1448e6f35403SYoshinobu Inoue * else send back meaningless h_errno, that being the one from 1449e6f35403SYoshinobu Inoue * the last DNSRCH we did. 1450e6f35403SYoshinobu Inoue */ 1451e6f35403SYoshinobu Inoue if (saved_herrno != -1) 1452e6f35403SYoshinobu Inoue *errp = saved_herrno; 1453e6f35403SYoshinobu Inoue else if (got_nodata) 1454e6f35403SYoshinobu Inoue *errp = NO_DATA; 1455e6f35403SYoshinobu Inoue else if (got_servfail) 1456e6f35403SYoshinobu Inoue *errp = TRY_AGAIN; 1457e6f35403SYoshinobu Inoue return (NULL); 1458e6f35403SYoshinobu Inoue } 1459e6f35403SYoshinobu Inoue 1460248aee62SJacques Vidrine static int 1461248aee62SJacques Vidrine _dns_ghbyname(void *rval, void *cb_data, va_list ap) 1462e6f35403SYoshinobu Inoue { 1463248aee62SJacques Vidrine const char *name; 1464248aee62SJacques Vidrine int af; 1465248aee62SJacques Vidrine int *errp; 1466e6f35403SYoshinobu Inoue struct __res_type_list *rtl, rtl4; 1467e6f35403SYoshinobu Inoue #ifdef INET6 1468e6f35403SYoshinobu Inoue struct __res_type_list rtl6; 1469e6f35403SYoshinobu Inoue #endif 1470e6f35403SYoshinobu Inoue 1471248aee62SJacques Vidrine name = va_arg(ap, const char *); 1472248aee62SJacques Vidrine af = va_arg(ap, int); 1473248aee62SJacques Vidrine errp = va_arg(ap, int *); 1474248aee62SJacques Vidrine 1475e6f35403SYoshinobu Inoue #ifdef INET6 1476e6f35403SYoshinobu Inoue switch (af) { 1477e6f35403SYoshinobu Inoue case AF_UNSPEC: 1478e6f35403SYoshinobu Inoue SLIST_NEXT(&rtl4, rtl_entry) = NULL; rtl4.rtl_type = T_A; 1479e6f35403SYoshinobu Inoue SLIST_NEXT(&rtl6, rtl_entry) = &rtl4; rtl6.rtl_type = T_AAAA; 1480e6f35403SYoshinobu Inoue rtl = &rtl6; 1481e6f35403SYoshinobu Inoue break; 1482e6f35403SYoshinobu Inoue case AF_INET6: 1483e6f35403SYoshinobu Inoue SLIST_NEXT(&rtl6, rtl_entry) = NULL; rtl6.rtl_type = T_AAAA; 1484e6f35403SYoshinobu Inoue rtl = &rtl6; 1485e6f35403SYoshinobu Inoue break; 1486e6f35403SYoshinobu Inoue case AF_INET: 1487e6f35403SYoshinobu Inoue SLIST_NEXT(&rtl4, rtl_entry) = NULL; rtl4.rtl_type = T_A; 1488e6f35403SYoshinobu Inoue rtl = &rtl4; 1489e6f35403SYoshinobu Inoue break; 1490e6f35403SYoshinobu Inoue } 1491e6f35403SYoshinobu Inoue #else 1492e6f35403SYoshinobu Inoue SLIST_NEXT(&rtl4, rtl_entry) = NULL; rtl4.rtl_type = T_A; 1493e6f35403SYoshinobu Inoue rtl = &rtl4; 1494e6f35403SYoshinobu Inoue #endif 1495248aee62SJacques Vidrine *(struct hostent **)rval = _res_search_multi(name, rtl, errp); 1496248aee62SJacques Vidrine return (*(struct hostent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND; 1497e6f35403SYoshinobu Inoue } 1498e6f35403SYoshinobu Inoue 1499248aee62SJacques Vidrine static int 1500248aee62SJacques Vidrine _dns_ghbyaddr(void *rval, void *cb_data, va_list ap) 15017d56d374SYoshinobu Inoue { 1502248aee62SJacques Vidrine const void *addr; 1503248aee62SJacques Vidrine int addrlen; 1504248aee62SJacques Vidrine int af; 1505248aee62SJacques Vidrine int *errp; 15067d56d374SYoshinobu Inoue int n; 150773b30f0cSJun-ichiro itojun Hagino struct hostent *hp; 150873b30f0cSJun-ichiro itojun Hagino u_char c, *cp; 15097d56d374SYoshinobu Inoue char *bp; 15107d56d374SYoshinobu Inoue struct hostent hbuf; 15117d56d374SYoshinobu Inoue int na; 15127d56d374SYoshinobu Inoue #ifdef INET6 15137d56d374SYoshinobu Inoue static const char hex[] = "0123456789abcdef"; 15147d56d374SYoshinobu Inoue #endif 151573b30f0cSJun-ichiro itojun Hagino querybuf buf; 151673b30f0cSJun-ichiro itojun Hagino char qbuf[MAXDNAME+1]; 151773b30f0cSJun-ichiro itojun Hagino char *hlist[2]; 15187d56d374SYoshinobu Inoue 1519248aee62SJacques Vidrine addr = va_arg(ap, const void *); 1520248aee62SJacques Vidrine addrlen = va_arg(ap, int); 1521248aee62SJacques Vidrine af = va_arg(ap, int); 1522248aee62SJacques Vidrine errp = va_arg(ap, int *); 1523248aee62SJacques Vidrine 1524248aee62SJacques Vidrine *(struct hostent **)rval = NULL; 1525248aee62SJacques Vidrine 15267d56d374SYoshinobu Inoue #ifdef INET6 15277d56d374SYoshinobu Inoue /* XXX */ 15287d56d374SYoshinobu Inoue if (af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL((struct in6_addr *)addr)) 1529248aee62SJacques Vidrine return NS_NOTFOUND; 15307d56d374SYoshinobu Inoue #endif 15317d56d374SYoshinobu Inoue 15327d56d374SYoshinobu Inoue if ((_res.options & RES_INIT) == 0) { 15337d56d374SYoshinobu Inoue if (res_init() < 0) { 15347d56d374SYoshinobu Inoue *errp = h_errno; 1535248aee62SJacques Vidrine return NS_UNAVAIL; 15367d56d374SYoshinobu Inoue } 15377d56d374SYoshinobu Inoue } 153873b30f0cSJun-ichiro itojun Hagino memset(&hbuf, 0, sizeof(hbuf)); 15397d56d374SYoshinobu Inoue hbuf.h_name = NULL; 15407d56d374SYoshinobu Inoue hbuf.h_addrtype = af; 15417d56d374SYoshinobu Inoue hbuf.h_length = addrlen; 15427d56d374SYoshinobu Inoue na = 0; 15437d56d374SYoshinobu Inoue 154473b30f0cSJun-ichiro itojun Hagino /* XXX assumes that MAXDNAME is big enough */ 15457d56d374SYoshinobu Inoue n = 0; 154673b30f0cSJun-ichiro itojun Hagino bp = qbuf; 15477d56d374SYoshinobu Inoue cp = (u_char *)addr+addrlen-1; 15487d56d374SYoshinobu Inoue switch (af) { 15497d56d374SYoshinobu Inoue #ifdef INET6 15507d56d374SYoshinobu Inoue case AF_INET6: 15517d56d374SYoshinobu Inoue for (; n < addrlen; n++, cp--) { 15527d56d374SYoshinobu Inoue c = *cp; 15537d56d374SYoshinobu Inoue *bp++ = hex[c & 0xf]; 15547d56d374SYoshinobu Inoue *bp++ = '.'; 15557d56d374SYoshinobu Inoue *bp++ = hex[c >> 4]; 15567d56d374SYoshinobu Inoue *bp++ = '.'; 15577d56d374SYoshinobu Inoue } 15587d56d374SYoshinobu Inoue strcpy(bp, "ip6.int"); 15597d56d374SYoshinobu Inoue break; 15607d56d374SYoshinobu Inoue #endif 15617d56d374SYoshinobu Inoue default: 15627d56d374SYoshinobu Inoue for (; n < addrlen; n++, cp--) { 15637d56d374SYoshinobu Inoue c = *cp; 15647d56d374SYoshinobu Inoue if (c >= 100) 15657d56d374SYoshinobu Inoue *bp++ = '0' + c / 100; 15667d56d374SYoshinobu Inoue if (c >= 10) 15677d56d374SYoshinobu Inoue *bp++ = '0' + (c % 100) / 10; 15687d56d374SYoshinobu Inoue *bp++ = '0' + c % 10; 15697d56d374SYoshinobu Inoue *bp++ = '.'; 15707d56d374SYoshinobu Inoue } 15717d56d374SYoshinobu Inoue strcpy(bp, "in-addr.arpa"); 15727d56d374SYoshinobu Inoue break; 15737d56d374SYoshinobu Inoue } 15747d56d374SYoshinobu Inoue 157573b30f0cSJun-ichiro itojun Hagino n = res_query(qbuf, C_IN, T_PTR, buf.buf, sizeof buf.buf); 15767d56d374SYoshinobu Inoue if (n < 0) { 15777d56d374SYoshinobu Inoue *errp = h_errno; 1578248aee62SJacques Vidrine return NS_UNAVAIL; 15797d56d374SYoshinobu Inoue } 158073b30f0cSJun-ichiro itojun Hagino hp = getanswer(&buf, n, qbuf, T_PTR, &hbuf, errp); 15813f587e57SKris Kennaway if (!hp) 1582248aee62SJacques Vidrine return NS_NOTFOUND; 158373b30f0cSJun-ichiro itojun Hagino hbuf.h_addrtype = af; 158473b30f0cSJun-ichiro itojun Hagino hbuf.h_length = addrlen; 158573b30f0cSJun-ichiro itojun Hagino hbuf.h_addr_list = hlist; 158673b30f0cSJun-ichiro itojun Hagino hlist[0] = (char *)addr; 158773b30f0cSJun-ichiro itojun Hagino hlist[1] = NULL; 1588248aee62SJacques Vidrine *(struct hostent **)rval = _hpcopy(&hbuf, errp); 1589248aee62SJacques Vidrine return NS_SUCCESS; 15907d56d374SYoshinobu Inoue } 15917d56d374SYoshinobu Inoue 159273b30f0cSJun-ichiro itojun Hagino static void 159373b30f0cSJun-ichiro itojun Hagino _dns_shent(int stayopen) 159473b30f0cSJun-ichiro itojun Hagino { 159573b30f0cSJun-ichiro itojun Hagino if ((_res.options & RES_INIT) == 0) { 159673b30f0cSJun-ichiro itojun Hagino if (res_init() < 0) 159773b30f0cSJun-ichiro itojun Hagino return; 159873b30f0cSJun-ichiro itojun Hagino } 159973b30f0cSJun-ichiro itojun Hagino if (stayopen) 160073b30f0cSJun-ichiro itojun Hagino _res.options |= RES_STAYOPEN | RES_USEVC; 160173b30f0cSJun-ichiro itojun Hagino } 160273b30f0cSJun-ichiro itojun Hagino 160373b30f0cSJun-ichiro itojun Hagino static void 160473b30f0cSJun-ichiro itojun Hagino _dns_ehent(void) 160573b30f0cSJun-ichiro itojun Hagino { 160673b30f0cSJun-ichiro itojun Hagino _res.options &= ~(RES_STAYOPEN | RES_USEVC); 160773b30f0cSJun-ichiro itojun Hagino res_close(); 160873b30f0cSJun-ichiro itojun Hagino } 160973b30f0cSJun-ichiro itojun Hagino 16107d56d374SYoshinobu Inoue #ifdef ICMPNL 16117d56d374SYoshinobu Inoue 16127d56d374SYoshinobu Inoue /* 16137d56d374SYoshinobu Inoue * experimental: 16147d56d374SYoshinobu Inoue * draft-ietf-ipngwg-icmp-namelookups-02.txt 16157d56d374SYoshinobu Inoue * ifindex is assumed to be encoded in addr. 16167d56d374SYoshinobu Inoue */ 16177d56d374SYoshinobu Inoue #include <sys/uio.h> 16187d56d374SYoshinobu Inoue #include <netinet/ip6.h> 16197d56d374SYoshinobu Inoue #include <netinet/icmp6.h> 16207d56d374SYoshinobu Inoue 16217d56d374SYoshinobu Inoue struct _icmp_host_cache { 16227d56d374SYoshinobu Inoue struct _icmp_host_cache *hc_next; 16237d56d374SYoshinobu Inoue int hc_ifindex; 16247d56d374SYoshinobu Inoue struct in6_addr hc_addr; 16257d56d374SYoshinobu Inoue char *hc_name; 16267d56d374SYoshinobu Inoue }; 16277d56d374SYoshinobu Inoue 16287d56d374SYoshinobu Inoue static char * 16297d56d374SYoshinobu Inoue _icmp_fqdn_query(const struct in6_addr *addr, int ifindex) 16307d56d374SYoshinobu Inoue { 16317d56d374SYoshinobu Inoue int s; 16327d56d374SYoshinobu Inoue struct icmp6_filter filter; 16337d56d374SYoshinobu Inoue struct msghdr msg; 16347d56d374SYoshinobu Inoue struct cmsghdr *cmsg; 16357d56d374SYoshinobu Inoue struct in6_pktinfo *pkt; 16367d56d374SYoshinobu Inoue char cbuf[256]; 16377d56d374SYoshinobu Inoue char buf[1024]; 16387d56d374SYoshinobu Inoue int cc; 16397d56d374SYoshinobu Inoue struct icmp6_fqdn_query *fq; 16407d56d374SYoshinobu Inoue struct icmp6_fqdn_reply *fr; 16417d56d374SYoshinobu Inoue struct _icmp_host_cache *hc; 16427d56d374SYoshinobu Inoue struct sockaddr_in6 sin6; 16437d56d374SYoshinobu Inoue struct iovec iov; 16447d56d374SYoshinobu Inoue fd_set s_fds, fds; 16457d56d374SYoshinobu Inoue struct timeval tout; 16467d56d374SYoshinobu Inoue int len; 16477d56d374SYoshinobu Inoue char *name; 16487d56d374SYoshinobu Inoue static int pid; 16497d56d374SYoshinobu Inoue static struct _icmp_host_cache *hc_head; 16507d56d374SYoshinobu Inoue 16517d56d374SYoshinobu Inoue for (hc = hc_head; hc; hc = hc->hc_next) { 16527d56d374SYoshinobu Inoue if (hc->hc_ifindex == ifindex 16537d56d374SYoshinobu Inoue && IN6_ARE_ADDR_EQUAL(&hc->hc_addr, addr)) 16547d56d374SYoshinobu Inoue return hc->hc_name; 16557d56d374SYoshinobu Inoue } 16567d56d374SYoshinobu Inoue 16577d56d374SYoshinobu Inoue if (pid == 0) 16587d56d374SYoshinobu Inoue pid = getpid(); 16597d56d374SYoshinobu Inoue 16607d56d374SYoshinobu Inoue ICMP6_FILTER_SETBLOCKALL(&filter); 16617d56d374SYoshinobu Inoue ICMP6_FILTER_SETPASS(ICMP6_FQDN_REPLY, &filter); 16627d56d374SYoshinobu Inoue 16637d56d374SYoshinobu Inoue FD_ZERO(&s_fds); 16647d56d374SYoshinobu Inoue tout.tv_sec = 0; 16657d56d374SYoshinobu Inoue tout.tv_usec = 200000; /*XXX: 200ms*/ 16667d56d374SYoshinobu Inoue 16677d56d374SYoshinobu Inoue fq = (struct icmp6_fqdn_query *)buf; 16687d56d374SYoshinobu Inoue fq->icmp6_fqdn_type = ICMP6_FQDN_QUERY; 16697d56d374SYoshinobu Inoue fq->icmp6_fqdn_code = 0; 16707d56d374SYoshinobu Inoue fq->icmp6_fqdn_cksum = 0; 16717d56d374SYoshinobu Inoue fq->icmp6_fqdn_id = (u_short)pid; 16727d56d374SYoshinobu Inoue fq->icmp6_fqdn_unused = 0; 16737d56d374SYoshinobu Inoue fq->icmp6_fqdn_cookie[0] = 0; 16747d56d374SYoshinobu Inoue fq->icmp6_fqdn_cookie[1] = 0; 16757d56d374SYoshinobu Inoue 16767d56d374SYoshinobu Inoue memset(&sin6, 0, sizeof(sin6)); 16777d56d374SYoshinobu Inoue sin6.sin6_family = AF_INET6; 16787d56d374SYoshinobu Inoue sin6.sin6_addr = *addr; 16797d56d374SYoshinobu Inoue 16807d56d374SYoshinobu Inoue memset(&msg, 0, sizeof(msg)); 16817d56d374SYoshinobu Inoue msg.msg_name = (caddr_t)&sin6; 16827d56d374SYoshinobu Inoue msg.msg_namelen = sizeof(sin6); 16837d56d374SYoshinobu Inoue msg.msg_iov = &iov; 16847d56d374SYoshinobu Inoue msg.msg_iovlen = 1; 16857d56d374SYoshinobu Inoue msg.msg_control = NULL; 16867d56d374SYoshinobu Inoue msg.msg_controllen = 0; 16877d56d374SYoshinobu Inoue iov.iov_base = (caddr_t)buf; 16887d56d374SYoshinobu Inoue iov.iov_len = sizeof(struct icmp6_fqdn_query); 16897d56d374SYoshinobu Inoue 16907d56d374SYoshinobu Inoue if (ifindex) { 16917d56d374SYoshinobu Inoue msg.msg_control = cbuf; 16927d56d374SYoshinobu Inoue msg.msg_controllen = sizeof(cbuf); 16937d56d374SYoshinobu Inoue cmsg = CMSG_FIRSTHDR(&msg); 16947d56d374SYoshinobu Inoue cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 16957d56d374SYoshinobu Inoue cmsg->cmsg_level = IPPROTO_IPV6; 16967d56d374SYoshinobu Inoue cmsg->cmsg_type = IPV6_PKTINFO; 16977d56d374SYoshinobu Inoue pkt = (struct in6_pktinfo *)&cmsg[1]; 16987d56d374SYoshinobu Inoue memset(&pkt->ipi6_addr, 0, sizeof(struct in6_addr)); 16997d56d374SYoshinobu Inoue pkt->ipi6_ifindex = ifindex; 17007d56d374SYoshinobu Inoue cmsg = CMSG_NXTHDR(&msg, cmsg); 17017d56d374SYoshinobu Inoue msg.msg_controllen = (char *)cmsg - cbuf; 17027d56d374SYoshinobu Inoue } 17037d56d374SYoshinobu Inoue 1704d201fe46SDaniel Eischen if ((s = _socket(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) 17057d56d374SYoshinobu Inoue return NULL; 1706d201fe46SDaniel Eischen (void)_setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, 17077d56d374SYoshinobu Inoue (char *)&filter, sizeof(filter)); 1708d201fe46SDaniel Eischen cc = _sendmsg(s, &msg, 0); 17097d56d374SYoshinobu Inoue if (cc < 0) { 17109233c4d9SJason Evans _close(s); 17117d56d374SYoshinobu Inoue return NULL; 17127d56d374SYoshinobu Inoue } 17137d56d374SYoshinobu Inoue FD_SET(s, &s_fds); 17147d56d374SYoshinobu Inoue for (;;) { 17157d56d374SYoshinobu Inoue fds = s_fds; 1716d201fe46SDaniel Eischen if (_select(s + 1, &fds, NULL, NULL, &tout) <= 0) { 17179233c4d9SJason Evans _close(s); 17187d56d374SYoshinobu Inoue return NULL; 17197d56d374SYoshinobu Inoue } 17207d56d374SYoshinobu Inoue len = sizeof(sin6); 1721d201fe46SDaniel Eischen cc = _recvfrom(s, buf, sizeof(buf), 0, 17227d56d374SYoshinobu Inoue (struct sockaddr *)&sin6, &len); 17237d56d374SYoshinobu Inoue if (cc <= 0) { 17249233c4d9SJason Evans _close(s); 17257d56d374SYoshinobu Inoue return NULL; 17267d56d374SYoshinobu Inoue } 17277d56d374SYoshinobu Inoue if (cc < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr)) 17287d56d374SYoshinobu Inoue continue; 17297d56d374SYoshinobu Inoue if (!IN6_ARE_ADDR_EQUAL(addr, &sin6.sin6_addr)) 17307d56d374SYoshinobu Inoue continue; 17317d56d374SYoshinobu Inoue fr = (struct icmp6_fqdn_reply *)(buf + sizeof(struct ip6_hdr)); 17327d56d374SYoshinobu Inoue if (fr->icmp6_fqdn_type == ICMP6_FQDN_REPLY) 17337d56d374SYoshinobu Inoue break; 17347d56d374SYoshinobu Inoue } 17359233c4d9SJason Evans _close(s); 17367d56d374SYoshinobu Inoue if (fr->icmp6_fqdn_cookie[1] != 0) { 17377d56d374SYoshinobu Inoue /* rfc1788 type */ 17387d56d374SYoshinobu Inoue name = buf + sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) + 4; 17397d56d374SYoshinobu Inoue len = (buf + cc) - name; 17407d56d374SYoshinobu Inoue } else { 17417d56d374SYoshinobu Inoue len = fr->icmp6_fqdn_namelen; 17427d56d374SYoshinobu Inoue name = fr->icmp6_fqdn_name; 17437d56d374SYoshinobu Inoue } 17447d56d374SYoshinobu Inoue if (len <= 0) 17457d56d374SYoshinobu Inoue return NULL; 17467d56d374SYoshinobu Inoue name[len] = 0; 17477d56d374SYoshinobu Inoue 17487d56d374SYoshinobu Inoue if ((hc = (struct _icmp_host_cache *)malloc(sizeof(*hc))) == NULL) 17497d56d374SYoshinobu Inoue return NULL; 17507d56d374SYoshinobu Inoue /* XXX: limit number of cached entries */ 17517d56d374SYoshinobu Inoue hc->hc_ifindex = ifindex; 17527d56d374SYoshinobu Inoue hc->hc_addr = *addr; 17537d56d374SYoshinobu Inoue hc->hc_name = strdup(name); 17547d56d374SYoshinobu Inoue hc->hc_next = hc_head; 17557d56d374SYoshinobu Inoue hc_head = hc; 17567d56d374SYoshinobu Inoue return hc->hc_name; 17577d56d374SYoshinobu Inoue } 17587d56d374SYoshinobu Inoue 17597d56d374SYoshinobu Inoue static struct hostent * 17607d56d374SYoshinobu Inoue _icmp_ghbyaddr(const void *addr, int addrlen, int af, int *errp) 17617d56d374SYoshinobu Inoue { 17627d56d374SYoshinobu Inoue char *hname; 17637d56d374SYoshinobu Inoue int ifindex; 17647d56d374SYoshinobu Inoue struct in6_addr addr6; 17657d56d374SYoshinobu Inoue 17667d56d374SYoshinobu Inoue if (af != AF_INET6) { 17677d56d374SYoshinobu Inoue /* 17687d56d374SYoshinobu Inoue * Note: rfc1788 defines Who Are You for IPv4, 17697d56d374SYoshinobu Inoue * but no one implements it. 17707d56d374SYoshinobu Inoue */ 17717d56d374SYoshinobu Inoue return NULL; 17727d56d374SYoshinobu Inoue } 17737d56d374SYoshinobu Inoue 17747d56d374SYoshinobu Inoue memcpy(&addr6, addr, addrlen); 17757d56d374SYoshinobu Inoue ifindex = (addr6.s6_addr[2] << 8) | addr6.s6_addr[3]; 17767d56d374SYoshinobu Inoue addr6.s6_addr[2] = addr6.s6_addr[3] = 0; 17777d56d374SYoshinobu Inoue 17787d56d374SYoshinobu Inoue if (!IN6_IS_ADDR_LINKLOCAL(&addr6)) 17797d56d374SYoshinobu Inoue return NULL; /*XXX*/ 17807d56d374SYoshinobu Inoue 17817d56d374SYoshinobu Inoue if ((hname = _icmp_fqdn_query(&addr6, ifindex)) == NULL) 17827d56d374SYoshinobu Inoue return NULL; 17837d56d374SYoshinobu Inoue return _hpaddr(af, hname, &addr6, errp); 17847d56d374SYoshinobu Inoue } 17857d56d374SYoshinobu Inoue #endif /* ICMPNL */ 1786