13f587e57SKris Kennaway /* $KAME: name6.c,v 1.25 2000/06/26 16:44:40 itojun Exp $ */ 273b30f0cSJun-ichiro itojun Hagino 37d56d374SYoshinobu Inoue /* 47d56d374SYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 57d56d374SYoshinobu Inoue * All rights reserved. 67d56d374SYoshinobu Inoue * 77d56d374SYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 87d56d374SYoshinobu Inoue * modification, are permitted provided that the following conditions 97d56d374SYoshinobu Inoue * are met: 107d56d374SYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 117d56d374SYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 127d56d374SYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 137d56d374SYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 147d56d374SYoshinobu Inoue * documentation and/or other materials provided with the distribution. 157d56d374SYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 167d56d374SYoshinobu Inoue * may be used to endorse or promote products derived from this software 177d56d374SYoshinobu Inoue * without specific prior written permission. 187d56d374SYoshinobu Inoue * 197d56d374SYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 207d56d374SYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 217d56d374SYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 227d56d374SYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 237d56d374SYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 247d56d374SYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 257d56d374SYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 267d56d374SYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 277d56d374SYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 287d56d374SYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 297d56d374SYoshinobu Inoue * SUCH DAMAGE. 307d56d374SYoshinobu Inoue */ 3173b30f0cSJun-ichiro itojun Hagino /* 3273b30f0cSJun-ichiro itojun Hagino * ++Copyright++ 1985, 1988, 1993 3373b30f0cSJun-ichiro itojun Hagino * - 3473b30f0cSJun-ichiro itojun Hagino * Copyright (c) 1985, 1988, 1993 3573b30f0cSJun-ichiro itojun Hagino * The Regents of the University of California. All rights reserved. 3673b30f0cSJun-ichiro itojun Hagino * 3773b30f0cSJun-ichiro itojun Hagino * Redistribution and use in source and binary forms, with or without 3873b30f0cSJun-ichiro itojun Hagino * modification, are permitted provided that the following conditions 3973b30f0cSJun-ichiro itojun Hagino * are met: 4073b30f0cSJun-ichiro itojun Hagino * 1. Redistributions of source code must retain the above copyright 4173b30f0cSJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer. 4273b30f0cSJun-ichiro itojun Hagino * 2. Redistributions in binary form must reproduce the above copyright 4373b30f0cSJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer in the 4473b30f0cSJun-ichiro itojun Hagino * documentation and/or other materials provided with the distribution. 4573b30f0cSJun-ichiro itojun Hagino * 3. All advertising materials mentioning features or use of this software 4673b30f0cSJun-ichiro itojun Hagino * must display the following acknowledgement: 4773b30f0cSJun-ichiro itojun Hagino * This product includes software developed by the University of 4873b30f0cSJun-ichiro itojun Hagino * California, Berkeley and its contributors. 4973b30f0cSJun-ichiro itojun Hagino * 4. Neither the name of the University nor the names of its contributors 5073b30f0cSJun-ichiro itojun Hagino * may be used to endorse or promote products derived from this software 5173b30f0cSJun-ichiro itojun Hagino * without specific prior written permission. 5273b30f0cSJun-ichiro itojun Hagino * 5373b30f0cSJun-ichiro itojun Hagino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5473b30f0cSJun-ichiro itojun Hagino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5573b30f0cSJun-ichiro itojun Hagino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5673b30f0cSJun-ichiro itojun Hagino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5773b30f0cSJun-ichiro itojun Hagino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5873b30f0cSJun-ichiro itojun Hagino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5973b30f0cSJun-ichiro itojun Hagino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6073b30f0cSJun-ichiro itojun Hagino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6173b30f0cSJun-ichiro itojun Hagino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6273b30f0cSJun-ichiro itojun Hagino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6373b30f0cSJun-ichiro itojun Hagino * SUCH DAMAGE. 6473b30f0cSJun-ichiro itojun Hagino * - 6573b30f0cSJun-ichiro itojun Hagino * Portions Copyright (c) 1993 by Digital Equipment Corporation. 6673b30f0cSJun-ichiro itojun Hagino * 6773b30f0cSJun-ichiro itojun Hagino * Permission to use, copy, modify, and distribute this software for any 6873b30f0cSJun-ichiro itojun Hagino * purpose with or without fee is hereby granted, provided that the above 6973b30f0cSJun-ichiro itojun Hagino * copyright notice and this permission notice appear in all copies, and that 7073b30f0cSJun-ichiro itojun Hagino * the name of Digital Equipment Corporation not be used in advertising or 7173b30f0cSJun-ichiro itojun Hagino * publicity pertaining to distribution of the document or software without 7273b30f0cSJun-ichiro itojun Hagino * specific, written prior permission. 7373b30f0cSJun-ichiro itojun Hagino * 7473b30f0cSJun-ichiro itojun Hagino * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 7573b30f0cSJun-ichiro itojun Hagino * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 7673b30f0cSJun-ichiro itojun Hagino * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 7773b30f0cSJun-ichiro itojun Hagino * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 7873b30f0cSJun-ichiro itojun Hagino * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 7973b30f0cSJun-ichiro itojun Hagino * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 8073b30f0cSJun-ichiro itojun Hagino * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 8173b30f0cSJun-ichiro itojun Hagino * SOFTWARE. 8273b30f0cSJun-ichiro itojun Hagino * - 8373b30f0cSJun-ichiro itojun Hagino * --Copyright-- 8473b30f0cSJun-ichiro itojun Hagino */ 8573b30f0cSJun-ichiro itojun Hagino 867d56d374SYoshinobu Inoue /* 877d56d374SYoshinobu Inoue * Atsushi Onoe <onoe@sm.sony.co.jp> 887d56d374SYoshinobu Inoue */ 897d56d374SYoshinobu Inoue 90333fc21eSDavid E. O'Brien #include <sys/cdefs.h> 91333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 92333fc21eSDavid E. O'Brien 93d201fe46SDaniel Eischen #include "namespace.h" 947d56d374SYoshinobu Inoue #include <sys/param.h> 957d56d374SYoshinobu Inoue #include <sys/socket.h> 967d56d374SYoshinobu Inoue #include <sys/time.h> 97e6f35403SYoshinobu Inoue #include <sys/queue.h> 987d56d374SYoshinobu Inoue #include <netinet/in.h> 99b8b31f33SHajimu UMEMOTO #ifdef INET6 100b8b31f33SHajimu UMEMOTO #include <net/if.h> 101b8b31f33SHajimu UMEMOTO #include <net/if_var.h> 102b8b31f33SHajimu UMEMOTO #include <sys/sysctl.h> 103146cd1bcSHajimu UMEMOTO #include <sys/ioctl.h> 104b8b31f33SHajimu UMEMOTO #include <netinet6/in6_var.h> /* XXX */ 105b8b31f33SHajimu UMEMOTO #endif 1067d56d374SYoshinobu Inoue 1077d56d374SYoshinobu Inoue #include <arpa/inet.h> 1087d56d374SYoshinobu Inoue #include <arpa/nameser.h> 1097d56d374SYoshinobu Inoue 110e6f35403SYoshinobu Inoue #include <errno.h> 1117d56d374SYoshinobu Inoue #include <netdb.h> 1127d56d374SYoshinobu Inoue #include <resolv.h> 1137d56d374SYoshinobu Inoue #include <stdio.h> 1147d56d374SYoshinobu Inoue #include <stdlib.h> 1157d56d374SYoshinobu Inoue #include <string.h> 116248aee62SJacques Vidrine #include <stdarg.h> 117248aee62SJacques Vidrine #include <nsswitch.h> 1187d56d374SYoshinobu Inoue #include <unistd.h> 119d201fe46SDaniel Eischen #include "un-namespace.h" 120bcb131aaSHajimu UMEMOTO #include "netdb_private.h" 1215342d17fSHajimu UMEMOTO #include "res_private.h" 1227d56d374SYoshinobu Inoue 1237d56d374SYoshinobu Inoue #ifndef MAXALIASES 1247d56d374SYoshinobu Inoue #define MAXALIASES 10 1257d56d374SYoshinobu Inoue #endif 1267d56d374SYoshinobu Inoue #ifndef MAXADDRS 1277d56d374SYoshinobu Inoue #define MAXADDRS 20 1287d56d374SYoshinobu Inoue #endif 1297d56d374SYoshinobu Inoue #ifndef MAXDNAME 1307d56d374SYoshinobu Inoue #define MAXDNAME 1025 1317d56d374SYoshinobu Inoue #endif 1327d56d374SYoshinobu Inoue 1337d56d374SYoshinobu Inoue #ifdef INET6 1347d56d374SYoshinobu Inoue #define ADDRLEN(af) ((af) == AF_INET6 ? sizeof(struct in6_addr) : \ 1357d56d374SYoshinobu Inoue sizeof(struct in_addr)) 1367d56d374SYoshinobu Inoue #else 1377d56d374SYoshinobu Inoue #define ADDRLEN(af) sizeof(struct in_addr) 1387d56d374SYoshinobu Inoue #endif 1397d56d374SYoshinobu Inoue 1407d56d374SYoshinobu Inoue #define MAPADDR(ab, ina) \ 1417d56d374SYoshinobu Inoue do { \ 1427d56d374SYoshinobu Inoue memcpy(&(ab)->map_inaddr, ina, sizeof(struct in_addr)); \ 1437d56d374SYoshinobu Inoue memset((ab)->map_zero, 0, sizeof((ab)->map_zero)); \ 1447d56d374SYoshinobu Inoue memset((ab)->map_one, 0xff, sizeof((ab)->map_one)); \ 1457d56d374SYoshinobu Inoue } while (0) 1467d56d374SYoshinobu Inoue #define MAPADDRENABLED(flags) \ 1477d56d374SYoshinobu Inoue (((flags) & AI_V4MAPPED) || \ 1483e83e4a3SMichael Bushkov (((flags) & AI_V4MAPPED_CFG))) 1497d56d374SYoshinobu Inoue 1507d56d374SYoshinobu Inoue union inx_addr { 1517d56d374SYoshinobu Inoue struct in_addr in_addr; 1527d56d374SYoshinobu Inoue #ifdef INET6 1537d56d374SYoshinobu Inoue struct in6_addr in6_addr; 1547d56d374SYoshinobu Inoue #endif 1557d56d374SYoshinobu Inoue struct { 1567d56d374SYoshinobu Inoue u_char mau_zero[10]; 1577d56d374SYoshinobu Inoue u_char mau_one[2]; 1587d56d374SYoshinobu Inoue struct in_addr mau_inaddr; 1597d56d374SYoshinobu Inoue } map_addr_un; 1607d56d374SYoshinobu Inoue #define map_zero map_addr_un.mau_zero 1617d56d374SYoshinobu Inoue #define map_one map_addr_un.mau_one 1627d56d374SYoshinobu Inoue #define map_inaddr map_addr_un.mau_inaddr 1637d56d374SYoshinobu Inoue }; 1647d56d374SYoshinobu Inoue 165b8b31f33SHajimu UMEMOTO struct policyqueue { 166b8b31f33SHajimu UMEMOTO TAILQ_ENTRY(policyqueue) pc_entry; 167b8b31f33SHajimu UMEMOTO #ifdef INET6 168b8b31f33SHajimu UMEMOTO struct in6_addrpolicy pc_policy; 169b8b31f33SHajimu UMEMOTO #endif 170b8b31f33SHajimu UMEMOTO }; 171b8b31f33SHajimu UMEMOTO TAILQ_HEAD(policyhead, policyqueue); 172b8b31f33SHajimu UMEMOTO 173146cd1bcSHajimu UMEMOTO #define AIO_SRCFLAG_DEPRECATED 0x1 174146cd1bcSHajimu UMEMOTO 175146cd1bcSHajimu UMEMOTO struct hp_order { 176146cd1bcSHajimu UMEMOTO union { 177146cd1bcSHajimu UMEMOTO struct sockaddr_storage aiou_ss; 178146cd1bcSHajimu UMEMOTO struct sockaddr aiou_sa; 179146cd1bcSHajimu UMEMOTO } aio_src_un; 180146cd1bcSHajimu UMEMOTO #define aio_srcsa aio_src_un.aiou_sa 181146cd1bcSHajimu UMEMOTO u_int32_t aio_srcflag; 182146cd1bcSHajimu UMEMOTO int aio_srcscope; 183146cd1bcSHajimu UMEMOTO int aio_dstscope; 184146cd1bcSHajimu UMEMOTO struct policyqueue *aio_srcpolicy; 185146cd1bcSHajimu UMEMOTO struct policyqueue *aio_dstpolicy; 186146cd1bcSHajimu UMEMOTO union { 187146cd1bcSHajimu UMEMOTO struct sockaddr_storage aiou_ss; 188146cd1bcSHajimu UMEMOTO struct sockaddr aiou_sa; 189146cd1bcSHajimu UMEMOTO } aio_un; 190146cd1bcSHajimu UMEMOTO #define aio_sa aio_un.aiou_sa 191146cd1bcSHajimu UMEMOTO int aio_matchlen; 192d6fd3ed8SHajimu UMEMOTO char *aio_h_addr; 193146cd1bcSHajimu UMEMOTO }; 194146cd1bcSHajimu UMEMOTO 1955342d17fSHajimu UMEMOTO static struct hostent *_hpcopy(struct hostent *, int *); 1965342d17fSHajimu UMEMOTO static struct hostent *_hpaddr(int, const char *, void *, int *); 1977d56d374SYoshinobu Inoue #ifdef INET6 1983e83e4a3SMichael Bushkov static struct hostent *_hpmerge(struct hostent *, struct hostent *, int *); 1995342d17fSHajimu UMEMOTO static struct hostent *_hpmapv6(struct hostent *, int *); 2007d56d374SYoshinobu Inoue #endif 2015342d17fSHajimu UMEMOTO static struct hostent *_hpsort(struct hostent *, res_state); 2027d56d374SYoshinobu Inoue 203f09c52c3SHajimu UMEMOTO #ifdef INET6 2045342d17fSHajimu UMEMOTO static struct hostent *_hpreorder(struct hostent *); 205b8b31f33SHajimu UMEMOTO static int get_addrselectpolicy(struct policyhead *); 206b8b31f33SHajimu UMEMOTO static void free_addrselectpolicy(struct policyhead *); 207b8b31f33SHajimu UMEMOTO static struct policyqueue *match_addrselectpolicy(struct sockaddr *, 208b8b31f33SHajimu UMEMOTO struct policyhead *); 209146cd1bcSHajimu UMEMOTO static void set_source(struct hp_order *, struct policyhead *); 210146cd1bcSHajimu UMEMOTO static int matchlen(struct sockaddr *, struct sockaddr *); 211146cd1bcSHajimu UMEMOTO static int comp_dst(const void *, const void *); 212146cd1bcSHajimu UMEMOTO static int gai_addr2scopetype(struct sockaddr *); 213d38f4eadSHajimu UMEMOTO #endif 214b8b31f33SHajimu UMEMOTO 2157d56d374SYoshinobu Inoue /* 2167d56d374SYoshinobu Inoue * Functions defined in RFC2553 21773b30f0cSJun-ichiro itojun Hagino * getipnodebyname, getipnodebyaddr, freehostent 2187d56d374SYoshinobu Inoue */ 2197d56d374SYoshinobu Inoue 2203e83e4a3SMichael Bushkov struct hostent * 2213e83e4a3SMichael Bushkov getipnodebyname(const char *name, int af, int flags, int *errp) 2227d56d374SYoshinobu Inoue { 2237d56d374SYoshinobu Inoue struct hostent *hp; 2243e83e4a3SMichael Bushkov union inx_addr addrbuf; 2253e83e4a3SMichael Bushkov res_state statp; 2263e83e4a3SMichael Bushkov u_long options; 227248aee62SJacques Vidrine 2283e83e4a3SMichael Bushkov switch (af) { 2293e83e4a3SMichael Bushkov case AF_INET: 2303e83e4a3SMichael Bushkov #ifdef INET6 2313e83e4a3SMichael Bushkov case AF_INET6: 23206a99fe3SHajimu UMEMOTO #endif 2333e83e4a3SMichael Bushkov break; 2343e83e4a3SMichael Bushkov default: 2353e83e4a3SMichael Bushkov *errp = NO_RECOVERY; 2363e83e4a3SMichael Bushkov return NULL; 2373e83e4a3SMichael Bushkov } 2387d56d374SYoshinobu Inoue 2397d56d374SYoshinobu Inoue if (flags & AI_ADDRCONFIG) { 2407d56d374SYoshinobu Inoue int s; 2417d56d374SYoshinobu Inoue 2420fbf0979SHajimu UMEMOTO if ((s = _socket(af, SOCK_DGRAM, 0)) < 0) 2430fbf0979SHajimu UMEMOTO return NULL; 2447d56d374SYoshinobu Inoue /* 2457d56d374SYoshinobu Inoue * TODO: 2467d56d374SYoshinobu Inoue * Note that implementation dependent test for address 2477d56d374SYoshinobu Inoue * configuration should be done everytime called 2487d56d374SYoshinobu Inoue * (or apropriate interval), 2497d56d374SYoshinobu Inoue * because addresses will be dynamically assigned or deleted. 2507d56d374SYoshinobu Inoue */ 2519233c4d9SJason Evans _close(s); 2527d56d374SYoshinobu Inoue } 2537d56d374SYoshinobu Inoue 2547d56d374SYoshinobu Inoue #ifdef INET6 2557d56d374SYoshinobu Inoue /* special case for literal address */ 2567d56d374SYoshinobu Inoue if (inet_pton(AF_INET6, name, &addrbuf) == 1) { 2577d56d374SYoshinobu Inoue if (af != AF_INET6) { 2587d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 2597d56d374SYoshinobu Inoue return NULL; 2607d56d374SYoshinobu Inoue } 2617d56d374SYoshinobu Inoue return _hpaddr(af, name, &addrbuf, errp); 2627d56d374SYoshinobu Inoue } 2637d56d374SYoshinobu Inoue #endif 264be26adb5SYoshinobu Inoue if (inet_aton(name, (struct in_addr *)&addrbuf) == 1) { 2657d56d374SYoshinobu Inoue if (af != AF_INET) { 2667d56d374SYoshinobu Inoue if (MAPADDRENABLED(flags)) { 2677d56d374SYoshinobu Inoue MAPADDR(&addrbuf, &addrbuf.in_addr); 2687d56d374SYoshinobu Inoue } else { 2697d56d374SYoshinobu Inoue *errp = HOST_NOT_FOUND; 2707d56d374SYoshinobu Inoue return NULL; 2717d56d374SYoshinobu Inoue } 2727d56d374SYoshinobu Inoue } 2737d56d374SYoshinobu Inoue return _hpaddr(af, name, &addrbuf, errp); 2747d56d374SYoshinobu Inoue } 2757d56d374SYoshinobu Inoue 2763e83e4a3SMichael Bushkov 2775342d17fSHajimu UMEMOTO statp = __res_state(); 2785342d17fSHajimu UMEMOTO if ((statp->options & RES_INIT) == 0) { 2795342d17fSHajimu UMEMOTO if (res_ninit(statp) < 0) { 2805342d17fSHajimu UMEMOTO *errp = NETDB_INTERNAL; 2815342d17fSHajimu UMEMOTO return NULL; 2825342d17fSHajimu UMEMOTO } 2835342d17fSHajimu UMEMOTO } 2845342d17fSHajimu UMEMOTO 2853e83e4a3SMichael Bushkov options = statp->options; 2863e83e4a3SMichael Bushkov statp->options &= ~RES_USE_INET6; 2873e83e4a3SMichael Bushkov 2883e83e4a3SMichael Bushkov hp = gethostbyname2(name, af); 2893e83e4a3SMichael Bushkov hp = _hpcopy(hp, errp); 2907d56d374SYoshinobu Inoue #ifdef INET6 291f09c52c3SHajimu UMEMOTO if (af == AF_INET6) 292f09c52c3SHajimu UMEMOTO hp = _hpreorder(hp); 293f09c52c3SHajimu UMEMOTO 294946e41f1SHajimu UMEMOTO if (af == AF_INET6 && ((flags & AI_ALL) || hp == NULL) && 295946e41f1SHajimu UMEMOTO MAPADDRENABLED(flags)) { 2963e83e4a3SMichael Bushkov struct hostent *hp2 = gethostbyname2(name, AF_INET); 2977d56d374SYoshinobu Inoue if (hp == NULL) 2983e83e4a3SMichael Bushkov if (hp2 == NULL) 2993e83e4a3SMichael Bushkov *errp = statp->res_h_errno; 3003e83e4a3SMichael Bushkov else 3017d56d374SYoshinobu Inoue hp = _hpmapv6(hp2, errp); 3027d56d374SYoshinobu Inoue else { 3033e83e4a3SMichael Bushkov if (hp2 && strcmp(hp->h_name, hp2->h_name) == 0) { 3043e83e4a3SMichael Bushkov struct hostent *hpb = hp; 3053e83e4a3SMichael Bushkov hp = _hpmerge(hpb, hp2, errp); 3063e83e4a3SMichael Bushkov freehostent(hpb); 3077d56d374SYoshinobu Inoue } 3087d56d374SYoshinobu Inoue } 3097d56d374SYoshinobu Inoue } 3107d56d374SYoshinobu Inoue #endif 3113e83e4a3SMichael Bushkov 3123e83e4a3SMichael Bushkov if (hp == NULL) 3133e83e4a3SMichael Bushkov *errp = statp->res_h_errno; 3143e83e4a3SMichael Bushkov 3153e83e4a3SMichael Bushkov statp->options = options; 316d38f4eadSHajimu UMEMOTO return _hpsort(hp, statp); 3177d56d374SYoshinobu Inoue } 3187d56d374SYoshinobu Inoue 3197d56d374SYoshinobu Inoue struct hostent * 3207d56d374SYoshinobu Inoue getipnodebyaddr(const void *src, size_t len, int af, int *errp) 3217d56d374SYoshinobu Inoue { 3227d56d374SYoshinobu Inoue struct hostent *hp; 3233e83e4a3SMichael Bushkov res_state statp; 3243e83e4a3SMichael Bushkov u_long options; 3253e83e4a3SMichael Bushkov 3267d56d374SYoshinobu Inoue #ifdef INET6 3277d56d374SYoshinobu Inoue struct in6_addr addrbuf; 3287d56d374SYoshinobu Inoue #else 3297d56d374SYoshinobu Inoue struct in_addr addrbuf; 3307d56d374SYoshinobu Inoue #endif 3317d56d374SYoshinobu Inoue 3327d56d374SYoshinobu Inoue switch (af) { 3337d56d374SYoshinobu Inoue case AF_INET: 3347d56d374SYoshinobu Inoue if (len != sizeof(struct in_addr)) { 3357d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 3367d56d374SYoshinobu Inoue return NULL; 3377d56d374SYoshinobu Inoue } 3387d56d374SYoshinobu Inoue if ((long)src & ~(sizeof(struct in_addr) - 1)) { 3397d56d374SYoshinobu Inoue memcpy(&addrbuf, src, len); 3407d56d374SYoshinobu Inoue src = &addrbuf; 3417d56d374SYoshinobu Inoue } 3427d56d374SYoshinobu Inoue if (((struct in_addr *)src)->s_addr == 0) 3437d56d374SYoshinobu Inoue return NULL; 3447d56d374SYoshinobu Inoue break; 3457d56d374SYoshinobu Inoue #ifdef INET6 3467d56d374SYoshinobu Inoue case AF_INET6: 3477d56d374SYoshinobu Inoue if (len != sizeof(struct in6_addr)) { 3487d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 3497d56d374SYoshinobu Inoue return NULL; 3507d56d374SYoshinobu Inoue } 3517d56d374SYoshinobu Inoue if ((long)src & ~(sizeof(struct in6_addr) / 2 - 1)) { /*XXX*/ 3527d56d374SYoshinobu Inoue memcpy(&addrbuf, src, len); 3537d56d374SYoshinobu Inoue src = &addrbuf; 3547d56d374SYoshinobu Inoue } 3553d670abcSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *)src)) 3563d670abcSYoshinobu Inoue return NULL; 3577d56d374SYoshinobu Inoue if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)src) 3587d56d374SYoshinobu Inoue || IN6_IS_ADDR_V4COMPAT((struct in6_addr *)src)) { 3597d56d374SYoshinobu Inoue src = (char *)src + 3607d56d374SYoshinobu Inoue (sizeof(struct in6_addr) - sizeof(struct in_addr)); 3617d56d374SYoshinobu Inoue af = AF_INET; 3627d56d374SYoshinobu Inoue len = sizeof(struct in_addr); 3637d56d374SYoshinobu Inoue } 3647d56d374SYoshinobu Inoue break; 3657d56d374SYoshinobu Inoue #endif 3667d56d374SYoshinobu Inoue default: 3677d56d374SYoshinobu Inoue *errp = NO_RECOVERY; 3687d56d374SYoshinobu Inoue return NULL; 3697d56d374SYoshinobu Inoue } 3707d56d374SYoshinobu Inoue 3713e83e4a3SMichael Bushkov statp = __res_state(); 3723e83e4a3SMichael Bushkov if ((statp->options & RES_INIT) == 0) { 3733e83e4a3SMichael Bushkov if (res_ninit(statp) < 0) { 3743e83e4a3SMichael Bushkov RES_SET_H_ERRNO(statp, NETDB_INTERNAL); 3753e83e4a3SMichael Bushkov return NULL; 3763e83e4a3SMichael Bushkov } 3773e83e4a3SMichael Bushkov } 3783e83e4a3SMichael Bushkov 3793e83e4a3SMichael Bushkov options = statp->options; 3803e83e4a3SMichael Bushkov statp->options &= ~RES_USE_INET6; 3813e83e4a3SMichael Bushkov 3823e83e4a3SMichael Bushkov hp = gethostbyaddr(src, len, af); 3833e83e4a3SMichael Bushkov if (hp == NULL) 3843e83e4a3SMichael Bushkov *errp = statp->res_h_errno; 3853e83e4a3SMichael Bushkov 3863e83e4a3SMichael Bushkov statp->options = options; 3873e83e4a3SMichael Bushkov return (_hpcopy(hp, errp)); 3887d56d374SYoshinobu Inoue } 3897d56d374SYoshinobu Inoue 3907d56d374SYoshinobu Inoue void 3917d56d374SYoshinobu Inoue freehostent(struct hostent *ptr) 3927d56d374SYoshinobu Inoue { 3937d56d374SYoshinobu Inoue free(ptr); 3947d56d374SYoshinobu Inoue } 3957d56d374SYoshinobu Inoue 3967d56d374SYoshinobu Inoue /* 3977d56d374SYoshinobu Inoue * Private utility functions 3987d56d374SYoshinobu Inoue */ 3997d56d374SYoshinobu Inoue 4007d56d374SYoshinobu Inoue /* 4017d56d374SYoshinobu Inoue * _hpcopy: allocate and copy hostent structure 4027d56d374SYoshinobu Inoue */ 4037d56d374SYoshinobu Inoue static struct hostent * 4047d56d374SYoshinobu Inoue _hpcopy(struct hostent *hp, int *errp) 4057d56d374SYoshinobu Inoue { 4067d56d374SYoshinobu Inoue struct hostent *nhp; 4077d56d374SYoshinobu Inoue char *cp, **pp; 4087d56d374SYoshinobu Inoue int size, addrsize; 4097d56d374SYoshinobu Inoue int nalias = 0, naddr = 0; 4107d56d374SYoshinobu Inoue int al_off; 4117d56d374SYoshinobu Inoue int i; 4127d56d374SYoshinobu Inoue 4137d56d374SYoshinobu Inoue if (hp == NULL) 4147d56d374SYoshinobu Inoue return hp; 4157d56d374SYoshinobu Inoue 4167d56d374SYoshinobu Inoue /* count size to be allocated */ 4177d56d374SYoshinobu Inoue size = sizeof(struct hostent); 41805c36511SHajimu UMEMOTO if (hp->h_name != NULL) 4197d56d374SYoshinobu Inoue size += strlen(hp->h_name) + 1; 4207d56d374SYoshinobu Inoue if ((pp = hp->h_aliases) != NULL) { 4217d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; i++, pp++) { 4227d56d374SYoshinobu Inoue if (**pp != '\0') { 4237d56d374SYoshinobu Inoue size += strlen(*pp) + 1; 4247d56d374SYoshinobu Inoue nalias++; 4257d56d374SYoshinobu Inoue } 4267d56d374SYoshinobu Inoue } 4277d56d374SYoshinobu Inoue } 4287d56d374SYoshinobu Inoue /* adjust alignment */ 4297d56d374SYoshinobu Inoue size = ALIGN(size); 4307d56d374SYoshinobu Inoue al_off = size; 4317d56d374SYoshinobu Inoue size += sizeof(char *) * (nalias + 1); 4327d56d374SYoshinobu Inoue addrsize = ALIGN(hp->h_length); 4337d56d374SYoshinobu Inoue if ((pp = hp->h_addr_list) != NULL) { 4347d56d374SYoshinobu Inoue while (*pp++ != NULL) 4357d56d374SYoshinobu Inoue naddr++; 4367d56d374SYoshinobu Inoue } 4377d56d374SYoshinobu Inoue size += addrsize * naddr; 4387d56d374SYoshinobu Inoue size += sizeof(char *) * (naddr + 1); 4397d56d374SYoshinobu Inoue 4407d56d374SYoshinobu Inoue /* copy */ 4417d56d374SYoshinobu Inoue if ((nhp = (struct hostent *)malloc(size)) == NULL) { 4427d56d374SYoshinobu Inoue *errp = TRY_AGAIN; 4437d56d374SYoshinobu Inoue return NULL; 4447d56d374SYoshinobu Inoue } 4457d56d374SYoshinobu Inoue cp = (char *)&nhp[1]; 44605c36511SHajimu UMEMOTO if (hp->h_name != NULL) { 4477d56d374SYoshinobu Inoue nhp->h_name = cp; 4487d56d374SYoshinobu Inoue strcpy(cp, hp->h_name); 4497d56d374SYoshinobu Inoue cp += strlen(cp) + 1; 4507d56d374SYoshinobu Inoue } else 4517d56d374SYoshinobu Inoue nhp->h_name = NULL; 4527d56d374SYoshinobu Inoue nhp->h_aliases = (char **)((char *)nhp + al_off); 4537d56d374SYoshinobu Inoue if ((pp = hp->h_aliases) != NULL) { 4547d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; pp++) { 4557d56d374SYoshinobu Inoue if (**pp != '\0') { 4567d56d374SYoshinobu Inoue nhp->h_aliases[i++] = cp; 4577d56d374SYoshinobu Inoue strcpy(cp, *pp); 4587d56d374SYoshinobu Inoue cp += strlen(cp) + 1; 4597d56d374SYoshinobu Inoue } 4607d56d374SYoshinobu Inoue } 4617d56d374SYoshinobu Inoue } 4627d56d374SYoshinobu Inoue nhp->h_aliases[nalias] = NULL; 4637d56d374SYoshinobu Inoue cp = (char *)&nhp->h_aliases[nalias + 1]; 4647d56d374SYoshinobu Inoue nhp->h_addrtype = hp->h_addrtype; 4657d56d374SYoshinobu Inoue nhp->h_length = hp->h_length; 4667d56d374SYoshinobu Inoue nhp->h_addr_list = (char **)cp; 4677d56d374SYoshinobu Inoue if ((pp = hp->h_addr_list) != NULL) { 4687d56d374SYoshinobu Inoue cp = (char *)&nhp->h_addr_list[naddr + 1]; 4697d56d374SYoshinobu Inoue for (i = 0; *pp != NULL; pp++) { 4707d56d374SYoshinobu Inoue nhp->h_addr_list[i++] = cp; 4717d56d374SYoshinobu Inoue memcpy(cp, *pp, hp->h_length); 4727d56d374SYoshinobu Inoue cp += addrsize; 4737d56d374SYoshinobu Inoue } 4747d56d374SYoshinobu Inoue } 4757d56d374SYoshinobu Inoue nhp->h_addr_list[naddr] = NULL; 4767d56d374SYoshinobu Inoue return nhp; 4777d56d374SYoshinobu Inoue } 4787d56d374SYoshinobu Inoue 4797d56d374SYoshinobu Inoue /* 4807d56d374SYoshinobu Inoue * _hpaddr: construct hostent structure with one address 4817d56d374SYoshinobu Inoue */ 4827d56d374SYoshinobu Inoue static struct hostent * 4837d56d374SYoshinobu Inoue _hpaddr(int af, const char *name, void *addr, int *errp) 4847d56d374SYoshinobu Inoue { 4857d56d374SYoshinobu Inoue struct hostent *hp, hpbuf; 4867d56d374SYoshinobu Inoue char *addrs[2]; 4877d56d374SYoshinobu Inoue 4887d56d374SYoshinobu Inoue hp = &hpbuf; 4897d56d374SYoshinobu Inoue hp->h_name = (char *)name; 4907d56d374SYoshinobu Inoue hp->h_aliases = NULL; 4917d56d374SYoshinobu Inoue hp->h_addrtype = af; 4927d56d374SYoshinobu Inoue hp->h_length = ADDRLEN(af); 4937d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 4947d56d374SYoshinobu Inoue addrs[0] = (char *)addr; 4957d56d374SYoshinobu Inoue addrs[1] = NULL; 4963e83e4a3SMichael Bushkov return (_hpcopy(hp, errp)); 4977d56d374SYoshinobu Inoue } 4987d56d374SYoshinobu Inoue 4993e83e4a3SMichael Bushkov #ifdef INET6 5007d56d374SYoshinobu Inoue /* 5017d56d374SYoshinobu Inoue * _hpmerge: merge 2 hostent structure, arguments will be freed 5027d56d374SYoshinobu Inoue */ 5037d56d374SYoshinobu Inoue static struct hostent * 5047d56d374SYoshinobu Inoue _hpmerge(struct hostent *hp1, struct hostent *hp2, int *errp) 5057d56d374SYoshinobu Inoue { 5067d56d374SYoshinobu Inoue int i, j; 5077d56d374SYoshinobu Inoue int naddr, nalias; 5087d56d374SYoshinobu Inoue char **pp; 5097d56d374SYoshinobu Inoue struct hostent *hp, hpbuf; 5107d56d374SYoshinobu Inoue char *aliases[MAXALIASES + 1], *addrs[MAXADDRS + 1]; 5117d56d374SYoshinobu Inoue union inx_addr addrbuf[MAXADDRS]; 5127d56d374SYoshinobu Inoue 5137d56d374SYoshinobu Inoue if (hp1 == NULL) 5143e83e4a3SMichael Bushkov return _hpcopy(hp2, errp); 5157d56d374SYoshinobu Inoue if (hp2 == NULL) 5163e83e4a3SMichael Bushkov return _hpcopy(hp1, errp); 5177d56d374SYoshinobu Inoue 5187d56d374SYoshinobu Inoue #define HP(i) (i == 1 ? hp1 : hp2) 5197d56d374SYoshinobu Inoue hp = &hpbuf; 5207d56d374SYoshinobu Inoue hp->h_name = (hp1->h_name != NULL ? hp1->h_name : hp2->h_name); 5217d56d374SYoshinobu Inoue hp->h_aliases = aliases; 5227d56d374SYoshinobu Inoue nalias = 0; 5237d56d374SYoshinobu Inoue for (i = 1; i <= 2; i++) { 5247d56d374SYoshinobu Inoue if ((pp = HP(i)->h_aliases) == NULL) 5257d56d374SYoshinobu Inoue continue; 5267d56d374SYoshinobu Inoue for (; nalias < MAXALIASES && *pp != NULL; pp++) { 5277d56d374SYoshinobu Inoue /* check duplicates */ 5287d56d374SYoshinobu Inoue for (j = 0; j < nalias; j++) 5297d56d374SYoshinobu Inoue if (strcasecmp(*pp, aliases[j]) == 0) 5307d56d374SYoshinobu Inoue break; 5317d56d374SYoshinobu Inoue if (j == nalias) 5327d56d374SYoshinobu Inoue aliases[nalias++] = *pp; 5337d56d374SYoshinobu Inoue } 5347d56d374SYoshinobu Inoue } 5357d56d374SYoshinobu Inoue aliases[nalias] = NULL; 5367d56d374SYoshinobu Inoue if (hp1->h_length != hp2->h_length) { 5377d56d374SYoshinobu Inoue hp->h_addrtype = AF_INET6; 5387d56d374SYoshinobu Inoue hp->h_length = sizeof(struct in6_addr); 5397d56d374SYoshinobu Inoue } else { 5407d56d374SYoshinobu Inoue hp->h_addrtype = hp1->h_addrtype; 5417d56d374SYoshinobu Inoue hp->h_length = hp1->h_length; 5427d56d374SYoshinobu Inoue } 5433e83e4a3SMichael Bushkov 5447d56d374SYoshinobu Inoue hp->h_addr_list = addrs; 5457d56d374SYoshinobu Inoue naddr = 0; 5467d56d374SYoshinobu Inoue for (i = 1; i <= 2; i++) { 5477d56d374SYoshinobu Inoue if ((pp = HP(i)->h_addr_list) == NULL) 5487d56d374SYoshinobu Inoue continue; 5497d56d374SYoshinobu Inoue if (HP(i)->h_length == hp->h_length) { 5507d56d374SYoshinobu Inoue while (naddr < MAXADDRS && *pp != NULL) 5517d56d374SYoshinobu Inoue addrs[naddr++] = *pp++; 5527d56d374SYoshinobu Inoue } else { 5537d56d374SYoshinobu Inoue /* copy IPv4 addr as mapped IPv6 addr */ 5547d56d374SYoshinobu Inoue while (naddr < MAXADDRS && *pp != NULL) { 5557d56d374SYoshinobu Inoue MAPADDR(&addrbuf[naddr], *pp++); 5567d56d374SYoshinobu Inoue addrs[naddr] = (char *)&addrbuf[naddr]; 5577d56d374SYoshinobu Inoue naddr++; 5587d56d374SYoshinobu Inoue } 5597d56d374SYoshinobu Inoue } 5607d56d374SYoshinobu Inoue } 5617d56d374SYoshinobu Inoue addrs[naddr] = NULL; 5623e83e4a3SMichael Bushkov return (_hpcopy(hp, errp)); 5637d56d374SYoshinobu Inoue } 5643e83e4a3SMichael Bushkov #endif 5657d56d374SYoshinobu Inoue 5667d56d374SYoshinobu Inoue /* 5677d56d374SYoshinobu Inoue * _hpmapv6: convert IPv4 hostent into IPv4-mapped IPv6 addresses 5687d56d374SYoshinobu Inoue */ 5697d56d374SYoshinobu Inoue #ifdef INET6 5707d56d374SYoshinobu Inoue static struct hostent * 5717d56d374SYoshinobu Inoue _hpmapv6(struct hostent *hp, int *errp) 5727d56d374SYoshinobu Inoue { 5733e83e4a3SMichael Bushkov struct hostent hp6; 5747d56d374SYoshinobu Inoue 5757d56d374SYoshinobu Inoue if (hp == NULL) 5767d56d374SYoshinobu Inoue return NULL; 5777d56d374SYoshinobu Inoue if (hp->h_addrtype == AF_INET6) 5783e83e4a3SMichael Bushkov return _hpcopy(hp, errp); 5797d56d374SYoshinobu Inoue 5803e83e4a3SMichael Bushkov memset(&hp6, 0, sizeof(struct hostent)); 5813e83e4a3SMichael Bushkov hp6.h_addrtype = AF_INET6; 5823e83e4a3SMichael Bushkov hp6.h_length = sizeof(struct in6_addr); 5833e83e4a3SMichael Bushkov return _hpmerge(&hp6, hp, errp); 5847d56d374SYoshinobu Inoue } 5857d56d374SYoshinobu Inoue #endif 5867d56d374SYoshinobu Inoue 5877d56d374SYoshinobu Inoue /* 5887d56d374SYoshinobu Inoue * _hpsort: sort address by sortlist 5897d56d374SYoshinobu Inoue */ 5907d56d374SYoshinobu Inoue static struct hostent * 5915342d17fSHajimu UMEMOTO _hpsort(struct hostent *hp, res_state statp) 5927d56d374SYoshinobu Inoue { 5937d56d374SYoshinobu Inoue int i, j, n; 5947d56d374SYoshinobu Inoue u_char *ap, *sp, *mp, **pp; 5957d56d374SYoshinobu Inoue char t; 5967d56d374SYoshinobu Inoue char order[MAXADDRS]; 5975342d17fSHajimu UMEMOTO int nsort = statp->nsort; 5987d56d374SYoshinobu Inoue 5997d56d374SYoshinobu Inoue if (hp == NULL || hp->h_addr_list[1] == NULL || nsort == 0) 6007d56d374SYoshinobu Inoue return hp; 6017d56d374SYoshinobu Inoue for (i = 0; (ap = (u_char *)hp->h_addr_list[i]); i++) { 6027d56d374SYoshinobu Inoue for (j = 0; j < nsort; j++) { 6037d56d374SYoshinobu Inoue #ifdef INET6 6045342d17fSHajimu UMEMOTO if (statp->_u._ext.ext->sort_list[j].af != 6055342d17fSHajimu UMEMOTO hp->h_addrtype) 6067d56d374SYoshinobu Inoue continue; 6075342d17fSHajimu UMEMOTO sp = (u_char *)&statp->_u._ext.ext->sort_list[j].addr; 6085342d17fSHajimu UMEMOTO mp = (u_char *)&statp->_u._ext.ext->sort_list[j].mask; 6097d56d374SYoshinobu Inoue #else 6105342d17fSHajimu UMEMOTO sp = (u_char *)&statp->sort_list[j].addr; 6115342d17fSHajimu UMEMOTO mp = (u_char *)&statp->sort_list[j].mask; 6127d56d374SYoshinobu Inoue #endif 6137d56d374SYoshinobu Inoue for (n = 0; n < hp->h_length; n++) { 6147d56d374SYoshinobu Inoue if ((ap[n] & mp[n]) != sp[n]) 6157d56d374SYoshinobu Inoue break; 6167d56d374SYoshinobu Inoue } 6177d56d374SYoshinobu Inoue if (n == hp->h_length) 6187d56d374SYoshinobu Inoue break; 6197d56d374SYoshinobu Inoue } 6207d56d374SYoshinobu Inoue order[i] = j; 6217d56d374SYoshinobu Inoue } 6227d56d374SYoshinobu Inoue n = i; 6237d56d374SYoshinobu Inoue pp = (u_char **)hp->h_addr_list; 6247d56d374SYoshinobu Inoue for (i = 0; i < n - 1; i++) { 6257d56d374SYoshinobu Inoue for (j = i + 1; j < n; j++) { 6267d56d374SYoshinobu Inoue if (order[i] > order[j]) { 6277d56d374SYoshinobu Inoue ap = pp[i]; 6287d56d374SYoshinobu Inoue pp[i] = pp[j]; 6297d56d374SYoshinobu Inoue pp[j] = ap; 6307d56d374SYoshinobu Inoue t = order[i]; 6317d56d374SYoshinobu Inoue order[i] = order[j]; 6327d56d374SYoshinobu Inoue order[j] = t; 6337d56d374SYoshinobu Inoue } 6347d56d374SYoshinobu Inoue } 6357d56d374SYoshinobu Inoue } 6367d56d374SYoshinobu Inoue return hp; 6377d56d374SYoshinobu Inoue } 6387d56d374SYoshinobu Inoue 639f09c52c3SHajimu UMEMOTO #ifdef INET6 6407d56d374SYoshinobu Inoue /* 641b8b31f33SHajimu UMEMOTO * _hpreorder: sort address by default address selection 642b8b31f33SHajimu UMEMOTO */ 643b8b31f33SHajimu UMEMOTO static struct hostent * 644b8b31f33SHajimu UMEMOTO _hpreorder(struct hostent *hp) 645b8b31f33SHajimu UMEMOTO { 646146cd1bcSHajimu UMEMOTO struct hp_order *aio; 647146cd1bcSHajimu UMEMOTO int i, n; 648d6fd3ed8SHajimu UMEMOTO char *ap; 649146cd1bcSHajimu UMEMOTO struct sockaddr *sa; 650b8b31f33SHajimu UMEMOTO struct policyhead policyhead; 651b8b31f33SHajimu UMEMOTO 652146cd1bcSHajimu UMEMOTO if (hp == NULL) 653b8b31f33SHajimu UMEMOTO return hp; 654b8b31f33SHajimu UMEMOTO 655b8b31f33SHajimu UMEMOTO switch (hp->h_addrtype) { 656b8b31f33SHajimu UMEMOTO case AF_INET: 657b8b31f33SHajimu UMEMOTO #ifdef INET6 658b8b31f33SHajimu UMEMOTO case AF_INET6: 659b8b31f33SHajimu UMEMOTO #endif 660146cd1bcSHajimu UMEMOTO break; 661b8b31f33SHajimu UMEMOTO default: 662b8b31f33SHajimu UMEMOTO free_addrselectpolicy(&policyhead); 663b8b31f33SHajimu UMEMOTO return hp; 664b8b31f33SHajimu UMEMOTO } 665b8b31f33SHajimu UMEMOTO 666146cd1bcSHajimu UMEMOTO /* count the number of addrinfo elements for sorting. */ 667146cd1bcSHajimu UMEMOTO for (n = 0; hp->h_addr_list[n] != NULL; n++) 668146cd1bcSHajimu UMEMOTO ; 669146cd1bcSHajimu UMEMOTO 670146cd1bcSHajimu UMEMOTO /* 671146cd1bcSHajimu UMEMOTO * If the number is small enough, we can skip the reordering process. 672146cd1bcSHajimu UMEMOTO */ 673146cd1bcSHajimu UMEMOTO if (n <= 1) 674146cd1bcSHajimu UMEMOTO return hp; 675146cd1bcSHajimu UMEMOTO 676146cd1bcSHajimu UMEMOTO /* allocate a temporary array for sort and initialization of it. */ 677146cd1bcSHajimu UMEMOTO if ((aio = malloc(sizeof(*aio) * n)) == NULL) 678146cd1bcSHajimu UMEMOTO return hp; /* give up reordering */ 679146cd1bcSHajimu UMEMOTO memset(aio, 0, sizeof(*aio) * n); 680146cd1bcSHajimu UMEMOTO 681146cd1bcSHajimu UMEMOTO /* retrieve address selection policy from the kernel */ 682146cd1bcSHajimu UMEMOTO TAILQ_INIT(&policyhead); 683146cd1bcSHajimu UMEMOTO if (!get_addrselectpolicy(&policyhead)) { 684146cd1bcSHajimu UMEMOTO /* no policy is installed into kernel, we don't sort. */ 685146cd1bcSHajimu UMEMOTO free(aio); 686146cd1bcSHajimu UMEMOTO return hp; 687b8b31f33SHajimu UMEMOTO } 688b8b31f33SHajimu UMEMOTO 689146cd1bcSHajimu UMEMOTO for (i = 0; i < n; i++) { 690d6fd3ed8SHajimu UMEMOTO ap = hp->h_addr_list[i]; 691146cd1bcSHajimu UMEMOTO aio[i].aio_h_addr = ap; 692146cd1bcSHajimu UMEMOTO sa = &aio[i].aio_sa; 693146cd1bcSHajimu UMEMOTO switch (hp->h_addrtype) { 694146cd1bcSHajimu UMEMOTO case AF_INET: 695146cd1bcSHajimu UMEMOTO sa->sa_family = AF_INET; 696146cd1bcSHajimu UMEMOTO sa->sa_len = sizeof(struct sockaddr_in); 697146cd1bcSHajimu UMEMOTO memcpy(&((struct sockaddr_in *)sa)->sin_addr, ap, 698146cd1bcSHajimu UMEMOTO sizeof(struct in_addr)); 699146cd1bcSHajimu UMEMOTO break; 700146cd1bcSHajimu UMEMOTO #ifdef INET6 701146cd1bcSHajimu UMEMOTO case AF_INET6: 702146cd1bcSHajimu UMEMOTO if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)ap)) { 703146cd1bcSHajimu UMEMOTO sa->sa_family = AF_INET; 704146cd1bcSHajimu UMEMOTO sa->sa_len = sizeof(struct sockaddr_in); 705146cd1bcSHajimu UMEMOTO memcpy(&((struct sockaddr_in *)sa)->sin_addr, 706146cd1bcSHajimu UMEMOTO &ap[12], sizeof(struct in_addr)); 707146cd1bcSHajimu UMEMOTO } else { 708146cd1bcSHajimu UMEMOTO sa->sa_family = AF_INET6; 709146cd1bcSHajimu UMEMOTO sa->sa_len = sizeof(struct sockaddr_in6); 710146cd1bcSHajimu UMEMOTO memcpy(&((struct sockaddr_in6 *)sa)->sin6_addr, 711146cd1bcSHajimu UMEMOTO ap, sizeof(struct in6_addr)); 712146cd1bcSHajimu UMEMOTO } 713146cd1bcSHajimu UMEMOTO break; 714146cd1bcSHajimu UMEMOTO #endif 715146cd1bcSHajimu UMEMOTO } 716146cd1bcSHajimu UMEMOTO aio[i].aio_dstscope = gai_addr2scopetype(sa); 717146cd1bcSHajimu UMEMOTO aio[i].aio_dstpolicy = match_addrselectpolicy(sa, &policyhead); 718146cd1bcSHajimu UMEMOTO set_source(&aio[i], &policyhead); 719146cd1bcSHajimu UMEMOTO } 720146cd1bcSHajimu UMEMOTO 721146cd1bcSHajimu UMEMOTO /* perform sorting. */ 722146cd1bcSHajimu UMEMOTO qsort(aio, n, sizeof(*aio), comp_dst); 723146cd1bcSHajimu UMEMOTO 724146cd1bcSHajimu UMEMOTO /* reorder the h_addr_list. */ 725146cd1bcSHajimu UMEMOTO for (i = 0; i < n; i++) 726146cd1bcSHajimu UMEMOTO hp->h_addr_list[i] = aio[i].aio_h_addr; 727146cd1bcSHajimu UMEMOTO 728b8b31f33SHajimu UMEMOTO /* cleanup and return */ 729146cd1bcSHajimu UMEMOTO free(aio); 730b8b31f33SHajimu UMEMOTO free_addrselectpolicy(&policyhead); 731b8b31f33SHajimu UMEMOTO return hp; 732b8b31f33SHajimu UMEMOTO } 733b8b31f33SHajimu UMEMOTO 734b8b31f33SHajimu UMEMOTO static int 73590d1d883SHajimu UMEMOTO get_addrselectpolicy(struct policyhead *head) 736b8b31f33SHajimu UMEMOTO { 737b8b31f33SHajimu UMEMOTO #ifdef INET6 738b8b31f33SHajimu UMEMOTO int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_ADDRCTLPOLICY }; 739b8b31f33SHajimu UMEMOTO size_t l; 740b8b31f33SHajimu UMEMOTO char *buf; 741b8b31f33SHajimu UMEMOTO struct in6_addrpolicy *pol, *ep; 742b8b31f33SHajimu UMEMOTO 743b8b31f33SHajimu UMEMOTO if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) 744b8b31f33SHajimu UMEMOTO return (0); 745b8b31f33SHajimu UMEMOTO if ((buf = malloc(l)) == NULL) 746b8b31f33SHajimu UMEMOTO return (0); 747b8b31f33SHajimu UMEMOTO if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) { 748b8b31f33SHajimu UMEMOTO free(buf); 749b8b31f33SHajimu UMEMOTO return (0); 750b8b31f33SHajimu UMEMOTO } 751b8b31f33SHajimu UMEMOTO 752b8b31f33SHajimu UMEMOTO ep = (struct in6_addrpolicy *)(buf + l); 753b8b31f33SHajimu UMEMOTO for (pol = (struct in6_addrpolicy *)buf; pol + 1 <= ep; pol++) { 754b8b31f33SHajimu UMEMOTO struct policyqueue *new; 755b8b31f33SHajimu UMEMOTO 756b8b31f33SHajimu UMEMOTO if ((new = malloc(sizeof(*new))) == NULL) { 757b8b31f33SHajimu UMEMOTO free_addrselectpolicy(head); /* make the list empty */ 758b8b31f33SHajimu UMEMOTO break; 759b8b31f33SHajimu UMEMOTO } 760b8b31f33SHajimu UMEMOTO new->pc_policy = *pol; 761b8b31f33SHajimu UMEMOTO TAILQ_INSERT_TAIL(head, new, pc_entry); 762b8b31f33SHajimu UMEMOTO } 763b8b31f33SHajimu UMEMOTO 764b8b31f33SHajimu UMEMOTO free(buf); 765b8b31f33SHajimu UMEMOTO return (1); 766b8b31f33SHajimu UMEMOTO #else 767b8b31f33SHajimu UMEMOTO return (0); 768b8b31f33SHajimu UMEMOTO #endif 769b8b31f33SHajimu UMEMOTO } 770b8b31f33SHajimu UMEMOTO 771b8b31f33SHajimu UMEMOTO static void 77290d1d883SHajimu UMEMOTO free_addrselectpolicy(struct policyhead *head) 773b8b31f33SHajimu UMEMOTO { 774b8b31f33SHajimu UMEMOTO struct policyqueue *ent, *nent; 775b8b31f33SHajimu UMEMOTO 776b8b31f33SHajimu UMEMOTO for (ent = TAILQ_FIRST(head); ent; ent = nent) { 777b8b31f33SHajimu UMEMOTO nent = TAILQ_NEXT(ent, pc_entry); 778b8b31f33SHajimu UMEMOTO TAILQ_REMOVE(head, ent, pc_entry); 779b8b31f33SHajimu UMEMOTO free(ent); 780b8b31f33SHajimu UMEMOTO } 781b8b31f33SHajimu UMEMOTO } 782b8b31f33SHajimu UMEMOTO 783b8b31f33SHajimu UMEMOTO static struct policyqueue * 78490d1d883SHajimu UMEMOTO match_addrselectpolicy(struct sockaddr *addr, struct policyhead *head) 785b8b31f33SHajimu UMEMOTO { 786b8b31f33SHajimu UMEMOTO #ifdef INET6 787b8b31f33SHajimu UMEMOTO struct policyqueue *ent, *bestent = NULL; 788b8b31f33SHajimu UMEMOTO struct in6_addrpolicy *pol; 789b8b31f33SHajimu UMEMOTO int matchlen, bestmatchlen = -1; 790b8b31f33SHajimu UMEMOTO u_char *mp, *ep, *k, *p, m; 791b8b31f33SHajimu UMEMOTO struct sockaddr_in6 key; 792b8b31f33SHajimu UMEMOTO 793b8b31f33SHajimu UMEMOTO switch(addr->sa_family) { 794b8b31f33SHajimu UMEMOTO case AF_INET6: 795b8b31f33SHajimu UMEMOTO key = *(struct sockaddr_in6 *)addr; 796b8b31f33SHajimu UMEMOTO break; 797b8b31f33SHajimu UMEMOTO case AF_INET: 798b8b31f33SHajimu UMEMOTO /* convert the address into IPv4-mapped IPv6 address. */ 799b8b31f33SHajimu UMEMOTO memset(&key, 0, sizeof(key)); 800b8b31f33SHajimu UMEMOTO key.sin6_family = AF_INET6; 801b8b31f33SHajimu UMEMOTO key.sin6_len = sizeof(key); 802b8b31f33SHajimu UMEMOTO key.sin6_addr.s6_addr[10] = 0xff; 803b8b31f33SHajimu UMEMOTO key.sin6_addr.s6_addr[11] = 0xff; 804b8b31f33SHajimu UMEMOTO memcpy(&key.sin6_addr.s6_addr[12], 805b8b31f33SHajimu UMEMOTO &((struct sockaddr_in *)addr)->sin_addr, 4); 806b8b31f33SHajimu UMEMOTO break; 807b8b31f33SHajimu UMEMOTO default: 808b8b31f33SHajimu UMEMOTO return(NULL); 809b8b31f33SHajimu UMEMOTO } 810b8b31f33SHajimu UMEMOTO 811b8b31f33SHajimu UMEMOTO for (ent = TAILQ_FIRST(head); ent; ent = TAILQ_NEXT(ent, pc_entry)) { 812b8b31f33SHajimu UMEMOTO pol = &ent->pc_policy; 813b8b31f33SHajimu UMEMOTO matchlen = 0; 814b8b31f33SHajimu UMEMOTO 815b8b31f33SHajimu UMEMOTO mp = (u_char *)&pol->addrmask.sin6_addr; 816b8b31f33SHajimu UMEMOTO ep = mp + 16; /* XXX: scope field? */ 817b8b31f33SHajimu UMEMOTO k = (u_char *)&key.sin6_addr; 818b8b31f33SHajimu UMEMOTO p = (u_char *)&pol->addr.sin6_addr; 819b8b31f33SHajimu UMEMOTO for (; mp < ep && *mp; mp++, k++, p++) { 820b8b31f33SHajimu UMEMOTO m = *mp; 821b8b31f33SHajimu UMEMOTO if ((*k & m) != *p) 822b8b31f33SHajimu UMEMOTO goto next; /* not match */ 823b8b31f33SHajimu UMEMOTO if (m == 0xff) /* short cut for a typical case */ 824b8b31f33SHajimu UMEMOTO matchlen += 8; 825b8b31f33SHajimu UMEMOTO else { 826b8b31f33SHajimu UMEMOTO while (m >= 0x80) { 827b8b31f33SHajimu UMEMOTO matchlen++; 828b8b31f33SHajimu UMEMOTO m <<= 1; 829b8b31f33SHajimu UMEMOTO } 830b8b31f33SHajimu UMEMOTO } 831b8b31f33SHajimu UMEMOTO } 832b8b31f33SHajimu UMEMOTO 833b8b31f33SHajimu UMEMOTO /* matched. check if this is better than the current best. */ 834b8b31f33SHajimu UMEMOTO if (matchlen > bestmatchlen) { 835b8b31f33SHajimu UMEMOTO bestent = ent; 836b8b31f33SHajimu UMEMOTO bestmatchlen = matchlen; 837b8b31f33SHajimu UMEMOTO } 838b8b31f33SHajimu UMEMOTO 839b8b31f33SHajimu UMEMOTO next: 840b8b31f33SHajimu UMEMOTO continue; 841b8b31f33SHajimu UMEMOTO } 842b8b31f33SHajimu UMEMOTO 843b8b31f33SHajimu UMEMOTO return(bestent); 844b8b31f33SHajimu UMEMOTO #else 845b8b31f33SHajimu UMEMOTO return(NULL); 846b8b31f33SHajimu UMEMOTO #endif 847b8b31f33SHajimu UMEMOTO 848b8b31f33SHajimu UMEMOTO } 849b8b31f33SHajimu UMEMOTO 850146cd1bcSHajimu UMEMOTO static void 85190d1d883SHajimu UMEMOTO set_source(struct hp_order *aio, struct policyhead *ph) 852146cd1bcSHajimu UMEMOTO { 853146cd1bcSHajimu UMEMOTO struct sockaddr_storage ss = aio->aio_un.aiou_ss; 854943db5a2SHajimu UMEMOTO socklen_t srclen; 855943db5a2SHajimu UMEMOTO int s; 856146cd1bcSHajimu UMEMOTO 857146cd1bcSHajimu UMEMOTO /* set unspec ("no source is available"), just in case */ 858146cd1bcSHajimu UMEMOTO aio->aio_srcsa.sa_family = AF_UNSPEC; 859146cd1bcSHajimu UMEMOTO aio->aio_srcscope = -1; 860146cd1bcSHajimu UMEMOTO 861146cd1bcSHajimu UMEMOTO switch(ss.ss_family) { 862146cd1bcSHajimu UMEMOTO case AF_INET: 863146cd1bcSHajimu UMEMOTO ((struct sockaddr_in *)&ss)->sin_port = htons(1); 864146cd1bcSHajimu UMEMOTO break; 865146cd1bcSHajimu UMEMOTO #ifdef INET6 866146cd1bcSHajimu UMEMOTO case AF_INET6: 867146cd1bcSHajimu UMEMOTO ((struct sockaddr_in6 *)&ss)->sin6_port = htons(1); 868146cd1bcSHajimu UMEMOTO break; 869146cd1bcSHajimu UMEMOTO #endif 870146cd1bcSHajimu UMEMOTO default: /* ignore unsupported AFs explicitly */ 871146cd1bcSHajimu UMEMOTO return; 872146cd1bcSHajimu UMEMOTO } 873146cd1bcSHajimu UMEMOTO 874146cd1bcSHajimu UMEMOTO /* open a socket to get the source address for the given dst */ 875146cd1bcSHajimu UMEMOTO if ((s = _socket(ss.ss_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) 876146cd1bcSHajimu UMEMOTO return; /* give up */ 877146cd1bcSHajimu UMEMOTO if (_connect(s, (struct sockaddr *)&ss, ss.ss_len) < 0) 878146cd1bcSHajimu UMEMOTO goto cleanup; 879146cd1bcSHajimu UMEMOTO srclen = ss.ss_len; 880146cd1bcSHajimu UMEMOTO if (_getsockname(s, &aio->aio_srcsa, &srclen) < 0) { 881146cd1bcSHajimu UMEMOTO aio->aio_srcsa.sa_family = AF_UNSPEC; 882146cd1bcSHajimu UMEMOTO goto cleanup; 883146cd1bcSHajimu UMEMOTO } 884146cd1bcSHajimu UMEMOTO aio->aio_srcscope = gai_addr2scopetype(&aio->aio_srcsa); 885146cd1bcSHajimu UMEMOTO aio->aio_srcpolicy = match_addrselectpolicy(&aio->aio_srcsa, ph); 886146cd1bcSHajimu UMEMOTO aio->aio_matchlen = matchlen(&aio->aio_srcsa, (struct sockaddr *)&ss); 887146cd1bcSHajimu UMEMOTO #ifdef INET6 888146cd1bcSHajimu UMEMOTO if (ss.ss_family == AF_INET6) { 889146cd1bcSHajimu UMEMOTO struct in6_ifreq ifr6; 890146cd1bcSHajimu UMEMOTO u_int32_t flags6; 891146cd1bcSHajimu UMEMOTO 892146cd1bcSHajimu UMEMOTO memset(&ifr6, 0, sizeof(ifr6)); 893146cd1bcSHajimu UMEMOTO memcpy(&ifr6.ifr_addr, &ss, ss.ss_len); 894146cd1bcSHajimu UMEMOTO if (_ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) == 0) { 895146cd1bcSHajimu UMEMOTO flags6 = ifr6.ifr_ifru.ifru_flags6; 896146cd1bcSHajimu UMEMOTO if ((flags6 & IN6_IFF_DEPRECATED)) 897146cd1bcSHajimu UMEMOTO aio->aio_srcflag |= AIO_SRCFLAG_DEPRECATED; 898146cd1bcSHajimu UMEMOTO } 899146cd1bcSHajimu UMEMOTO } 900146cd1bcSHajimu UMEMOTO #endif 901146cd1bcSHajimu UMEMOTO 902146cd1bcSHajimu UMEMOTO cleanup: 903146cd1bcSHajimu UMEMOTO _close(s); 904146cd1bcSHajimu UMEMOTO return; 905146cd1bcSHajimu UMEMOTO } 906146cd1bcSHajimu UMEMOTO 907146cd1bcSHajimu UMEMOTO static int 90890d1d883SHajimu UMEMOTO matchlen(struct sockaddr *src, struct sockaddr *dst) 909146cd1bcSHajimu UMEMOTO { 910146cd1bcSHajimu UMEMOTO int match = 0; 911146cd1bcSHajimu UMEMOTO u_char *s, *d; 912146cd1bcSHajimu UMEMOTO u_char *lim, r; 913146cd1bcSHajimu UMEMOTO int addrlen; 914146cd1bcSHajimu UMEMOTO 915146cd1bcSHajimu UMEMOTO switch (src->sa_family) { 916146cd1bcSHajimu UMEMOTO #ifdef INET6 917146cd1bcSHajimu UMEMOTO case AF_INET6: 918146cd1bcSHajimu UMEMOTO s = (u_char *)&((struct sockaddr_in6 *)src)->sin6_addr; 919146cd1bcSHajimu UMEMOTO d = (u_char *)&((struct sockaddr_in6 *)dst)->sin6_addr; 920146cd1bcSHajimu UMEMOTO addrlen = sizeof(struct in6_addr); 921146cd1bcSHajimu UMEMOTO lim = s + addrlen; 922146cd1bcSHajimu UMEMOTO break; 923146cd1bcSHajimu UMEMOTO #endif 924146cd1bcSHajimu UMEMOTO case AF_INET: 925fd57e549SGeorge V. Neville-Neil s = (u_char *)&((struct sockaddr_in *)src)->sin_addr; 926fd57e549SGeorge V. Neville-Neil d = (u_char *)&((struct sockaddr_in *)dst)->sin_addr; 927146cd1bcSHajimu UMEMOTO addrlen = sizeof(struct in_addr); 928146cd1bcSHajimu UMEMOTO lim = s + addrlen; 929146cd1bcSHajimu UMEMOTO break; 930146cd1bcSHajimu UMEMOTO default: 931146cd1bcSHajimu UMEMOTO return(0); 932146cd1bcSHajimu UMEMOTO } 933146cd1bcSHajimu UMEMOTO 934146cd1bcSHajimu UMEMOTO while (s < lim) 935146cd1bcSHajimu UMEMOTO if ((r = (*d++ ^ *s++)) != 0) { 936146cd1bcSHajimu UMEMOTO while (r < addrlen * 8) { 937146cd1bcSHajimu UMEMOTO match++; 938146cd1bcSHajimu UMEMOTO r <<= 1; 939146cd1bcSHajimu UMEMOTO } 940146cd1bcSHajimu UMEMOTO break; 941146cd1bcSHajimu UMEMOTO } else 942146cd1bcSHajimu UMEMOTO match += 8; 943146cd1bcSHajimu UMEMOTO return(match); 944146cd1bcSHajimu UMEMOTO } 945146cd1bcSHajimu UMEMOTO 946146cd1bcSHajimu UMEMOTO static int 94790d1d883SHajimu UMEMOTO comp_dst(const void *arg1, const void *arg2) 948146cd1bcSHajimu UMEMOTO { 949146cd1bcSHajimu UMEMOTO const struct hp_order *dst1 = arg1, *dst2 = arg2; 950146cd1bcSHajimu UMEMOTO 951146cd1bcSHajimu UMEMOTO /* 952146cd1bcSHajimu UMEMOTO * Rule 1: Avoid unusable destinations. 953146cd1bcSHajimu UMEMOTO * XXX: we currently do not consider if an appropriate route exists. 954146cd1bcSHajimu UMEMOTO */ 955146cd1bcSHajimu UMEMOTO if (dst1->aio_srcsa.sa_family != AF_UNSPEC && 956146cd1bcSHajimu UMEMOTO dst2->aio_srcsa.sa_family == AF_UNSPEC) { 957146cd1bcSHajimu UMEMOTO return(-1); 958146cd1bcSHajimu UMEMOTO } 959146cd1bcSHajimu UMEMOTO if (dst1->aio_srcsa.sa_family == AF_UNSPEC && 960146cd1bcSHajimu UMEMOTO dst2->aio_srcsa.sa_family != AF_UNSPEC) { 961146cd1bcSHajimu UMEMOTO return(1); 962146cd1bcSHajimu UMEMOTO } 963146cd1bcSHajimu UMEMOTO 964146cd1bcSHajimu UMEMOTO /* Rule 2: Prefer matching scope. */ 965146cd1bcSHajimu UMEMOTO if (dst1->aio_dstscope == dst1->aio_srcscope && 966146cd1bcSHajimu UMEMOTO dst2->aio_dstscope != dst2->aio_srcscope) { 967146cd1bcSHajimu UMEMOTO return(-1); 968146cd1bcSHajimu UMEMOTO } 969146cd1bcSHajimu UMEMOTO if (dst1->aio_dstscope != dst1->aio_srcscope && 970146cd1bcSHajimu UMEMOTO dst2->aio_dstscope == dst2->aio_srcscope) { 971146cd1bcSHajimu UMEMOTO return(1); 972146cd1bcSHajimu UMEMOTO } 973146cd1bcSHajimu UMEMOTO 974146cd1bcSHajimu UMEMOTO /* Rule 3: Avoid deprecated addresses. */ 975146cd1bcSHajimu UMEMOTO if (dst1->aio_srcsa.sa_family != AF_UNSPEC && 976146cd1bcSHajimu UMEMOTO dst2->aio_srcsa.sa_family != AF_UNSPEC) { 977146cd1bcSHajimu UMEMOTO if (!(dst1->aio_srcflag & AIO_SRCFLAG_DEPRECATED) && 978146cd1bcSHajimu UMEMOTO (dst2->aio_srcflag & AIO_SRCFLAG_DEPRECATED)) { 979146cd1bcSHajimu UMEMOTO return(-1); 980146cd1bcSHajimu UMEMOTO } 981146cd1bcSHajimu UMEMOTO if ((dst1->aio_srcflag & AIO_SRCFLAG_DEPRECATED) && 982146cd1bcSHajimu UMEMOTO !(dst2->aio_srcflag & AIO_SRCFLAG_DEPRECATED)) { 983146cd1bcSHajimu UMEMOTO return(1); 984146cd1bcSHajimu UMEMOTO } 985146cd1bcSHajimu UMEMOTO } 986146cd1bcSHajimu UMEMOTO 987146cd1bcSHajimu UMEMOTO /* Rule 4: Prefer home addresses. */ 988146cd1bcSHajimu UMEMOTO /* XXX: not implemented yet */ 989146cd1bcSHajimu UMEMOTO 990146cd1bcSHajimu UMEMOTO /* Rule 5: Prefer matching label. */ 991146cd1bcSHajimu UMEMOTO #ifdef INET6 992146cd1bcSHajimu UMEMOTO if (dst1->aio_srcpolicy && dst1->aio_dstpolicy && 993146cd1bcSHajimu UMEMOTO dst1->aio_srcpolicy->pc_policy.label == 994146cd1bcSHajimu UMEMOTO dst1->aio_dstpolicy->pc_policy.label && 995146cd1bcSHajimu UMEMOTO (dst2->aio_srcpolicy == NULL || dst2->aio_dstpolicy == NULL || 996146cd1bcSHajimu UMEMOTO dst2->aio_srcpolicy->pc_policy.label != 997146cd1bcSHajimu UMEMOTO dst2->aio_dstpolicy->pc_policy.label)) { 998146cd1bcSHajimu UMEMOTO return(-1); 999146cd1bcSHajimu UMEMOTO } 1000146cd1bcSHajimu UMEMOTO if (dst2->aio_srcpolicy && dst2->aio_dstpolicy && 1001146cd1bcSHajimu UMEMOTO dst2->aio_srcpolicy->pc_policy.label == 1002146cd1bcSHajimu UMEMOTO dst2->aio_dstpolicy->pc_policy.label && 1003146cd1bcSHajimu UMEMOTO (dst1->aio_srcpolicy == NULL || dst1->aio_dstpolicy == NULL || 1004146cd1bcSHajimu UMEMOTO dst1->aio_srcpolicy->pc_policy.label != 1005146cd1bcSHajimu UMEMOTO dst1->aio_dstpolicy->pc_policy.label)) { 1006146cd1bcSHajimu UMEMOTO return(1); 1007146cd1bcSHajimu UMEMOTO } 1008146cd1bcSHajimu UMEMOTO #endif 1009146cd1bcSHajimu UMEMOTO 1010146cd1bcSHajimu UMEMOTO /* Rule 6: Prefer higher precedence. */ 1011146cd1bcSHajimu UMEMOTO #ifdef INET6 1012146cd1bcSHajimu UMEMOTO if (dst1->aio_dstpolicy && 1013146cd1bcSHajimu UMEMOTO (dst2->aio_dstpolicy == NULL || 1014146cd1bcSHajimu UMEMOTO dst1->aio_dstpolicy->pc_policy.preced > 1015146cd1bcSHajimu UMEMOTO dst2->aio_dstpolicy->pc_policy.preced)) { 1016146cd1bcSHajimu UMEMOTO return(-1); 1017146cd1bcSHajimu UMEMOTO } 1018146cd1bcSHajimu UMEMOTO if (dst2->aio_dstpolicy && 1019146cd1bcSHajimu UMEMOTO (dst1->aio_dstpolicy == NULL || 1020146cd1bcSHajimu UMEMOTO dst2->aio_dstpolicy->pc_policy.preced > 1021146cd1bcSHajimu UMEMOTO dst1->aio_dstpolicy->pc_policy.preced)) { 1022146cd1bcSHajimu UMEMOTO return(1); 1023146cd1bcSHajimu UMEMOTO } 1024146cd1bcSHajimu UMEMOTO #endif 1025146cd1bcSHajimu UMEMOTO 1026146cd1bcSHajimu UMEMOTO /* Rule 7: Prefer native transport. */ 1027146cd1bcSHajimu UMEMOTO /* XXX: not implemented yet */ 1028146cd1bcSHajimu UMEMOTO 1029146cd1bcSHajimu UMEMOTO /* Rule 8: Prefer smaller scope. */ 1030146cd1bcSHajimu UMEMOTO if (dst1->aio_dstscope >= 0 && 1031146cd1bcSHajimu UMEMOTO dst1->aio_dstscope < dst2->aio_dstscope) { 1032146cd1bcSHajimu UMEMOTO return(-1); 1033146cd1bcSHajimu UMEMOTO } 1034146cd1bcSHajimu UMEMOTO if (dst2->aio_dstscope >= 0 && 1035146cd1bcSHajimu UMEMOTO dst2->aio_dstscope < dst1->aio_dstscope) { 1036146cd1bcSHajimu UMEMOTO return(1); 1037146cd1bcSHajimu UMEMOTO } 1038146cd1bcSHajimu UMEMOTO 1039146cd1bcSHajimu UMEMOTO /* 1040146cd1bcSHajimu UMEMOTO * Rule 9: Use longest matching prefix. 1041146cd1bcSHajimu UMEMOTO * We compare the match length in a same AF only. 1042146cd1bcSHajimu UMEMOTO */ 1043146cd1bcSHajimu UMEMOTO if (dst1->aio_sa.sa_family == dst2->aio_sa.sa_family) { 1044146cd1bcSHajimu UMEMOTO if (dst1->aio_matchlen > dst2->aio_matchlen) { 1045146cd1bcSHajimu UMEMOTO return(-1); 1046146cd1bcSHajimu UMEMOTO } 1047146cd1bcSHajimu UMEMOTO if (dst1->aio_matchlen < dst2->aio_matchlen) { 1048146cd1bcSHajimu UMEMOTO return(1); 1049146cd1bcSHajimu UMEMOTO } 1050146cd1bcSHajimu UMEMOTO } 1051146cd1bcSHajimu UMEMOTO 1052146cd1bcSHajimu UMEMOTO /* Rule 10: Otherwise, leave the order unchanged. */ 1053146cd1bcSHajimu UMEMOTO return(-1); 1054146cd1bcSHajimu UMEMOTO } 1055146cd1bcSHajimu UMEMOTO 1056146cd1bcSHajimu UMEMOTO /* 1057146cd1bcSHajimu UMEMOTO * Copy from scope.c. 1058146cd1bcSHajimu UMEMOTO * XXX: we should standardize the functions and link them as standard 1059146cd1bcSHajimu UMEMOTO * library. 1060146cd1bcSHajimu UMEMOTO */ 1061146cd1bcSHajimu UMEMOTO static int 106290d1d883SHajimu UMEMOTO gai_addr2scopetype(struct sockaddr *sa) 1063146cd1bcSHajimu UMEMOTO { 1064146cd1bcSHajimu UMEMOTO #ifdef INET6 1065146cd1bcSHajimu UMEMOTO struct sockaddr_in6 *sa6; 1066146cd1bcSHajimu UMEMOTO #endif 1067146cd1bcSHajimu UMEMOTO struct sockaddr_in *sa4; 1068146cd1bcSHajimu UMEMOTO 1069146cd1bcSHajimu UMEMOTO switch(sa->sa_family) { 1070146cd1bcSHajimu UMEMOTO #ifdef INET6 1071146cd1bcSHajimu UMEMOTO case AF_INET6: 1072146cd1bcSHajimu UMEMOTO sa6 = (struct sockaddr_in6 *)sa; 1073146cd1bcSHajimu UMEMOTO if (IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)) { 1074146cd1bcSHajimu UMEMOTO /* just use the scope field of the multicast address */ 1075146cd1bcSHajimu UMEMOTO return(sa6->sin6_addr.s6_addr[2] & 0x0f); 1076146cd1bcSHajimu UMEMOTO } 1077146cd1bcSHajimu UMEMOTO /* 1078146cd1bcSHajimu UMEMOTO * Unicast addresses: map scope type to corresponding scope 1079146cd1bcSHajimu UMEMOTO * value defined for multcast addresses. 1080146cd1bcSHajimu UMEMOTO * XXX: hardcoded scope type values are bad... 1081146cd1bcSHajimu UMEMOTO */ 1082146cd1bcSHajimu UMEMOTO if (IN6_IS_ADDR_LOOPBACK(&sa6->sin6_addr)) 1083146cd1bcSHajimu UMEMOTO return(1); /* node local scope */ 1084146cd1bcSHajimu UMEMOTO if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) 1085146cd1bcSHajimu UMEMOTO return(2); /* link-local scope */ 1086146cd1bcSHajimu UMEMOTO if (IN6_IS_ADDR_SITELOCAL(&sa6->sin6_addr)) 1087146cd1bcSHajimu UMEMOTO return(5); /* site-local scope */ 1088146cd1bcSHajimu UMEMOTO return(14); /* global scope */ 1089146cd1bcSHajimu UMEMOTO break; 1090146cd1bcSHajimu UMEMOTO #endif 1091146cd1bcSHajimu UMEMOTO case AF_INET: 1092146cd1bcSHajimu UMEMOTO /* 1093146cd1bcSHajimu UMEMOTO * IPv4 pseudo scoping according to RFC 3484. 1094146cd1bcSHajimu UMEMOTO */ 1095146cd1bcSHajimu UMEMOTO sa4 = (struct sockaddr_in *)sa; 1096146cd1bcSHajimu UMEMOTO /* IPv4 autoconfiguration addresses have link-local scope. */ 1097146cd1bcSHajimu UMEMOTO if (((u_char *)&sa4->sin_addr)[0] == 169 && 1098146cd1bcSHajimu UMEMOTO ((u_char *)&sa4->sin_addr)[1] == 254) 1099146cd1bcSHajimu UMEMOTO return(2); 1100146cd1bcSHajimu UMEMOTO /* Private addresses have site-local scope. */ 1101146cd1bcSHajimu UMEMOTO if (((u_char *)&sa4->sin_addr)[0] == 10 || 1102146cd1bcSHajimu UMEMOTO (((u_char *)&sa4->sin_addr)[0] == 172 && 1103146cd1bcSHajimu UMEMOTO (((u_char *)&sa4->sin_addr)[1] & 0xf0) == 16) || 1104146cd1bcSHajimu UMEMOTO (((u_char *)&sa4->sin_addr)[0] == 192 && 1105146cd1bcSHajimu UMEMOTO ((u_char *)&sa4->sin_addr)[1] == 168)) 1106146cd1bcSHajimu UMEMOTO return(14); /* XXX: It should be 5 unless NAT */ 1107146cd1bcSHajimu UMEMOTO /* Loopback addresses have link-local scope. */ 1108146cd1bcSHajimu UMEMOTO if (((u_char *)&sa4->sin_addr)[0] == 127) 1109146cd1bcSHajimu UMEMOTO return(2); 1110146cd1bcSHajimu UMEMOTO return(14); 1111146cd1bcSHajimu UMEMOTO break; 1112146cd1bcSHajimu UMEMOTO default: 1113146cd1bcSHajimu UMEMOTO errno = EAFNOSUPPORT; /* is this a good error? */ 1114146cd1bcSHajimu UMEMOTO return(-1); 1115146cd1bcSHajimu UMEMOTO } 1116146cd1bcSHajimu UMEMOTO } 1117d38f4eadSHajimu UMEMOTO #endif 1118