158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/* $NetBSD: gethnamaddr.c,v 1.91 2014/06/19 15:08:18 christos Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ++Copyright++ 1985, 1988, 1993 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1985, 1988, 1993 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * The Regents of the University of California. All rights reserved. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Portions Copyright (c) 1993 by Digital Equipment Corporation. 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Permission to use, copy, modify, and distribute this software for any 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * purpose with or without fee is hereby granted, provided that the above 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * copyright notice and this permission notice appear in all copies, and that 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * the name of Digital Equipment Corporation not be used in advertising or 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * publicity pertaining to distribution of the document or software without 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * specific, written prior permission. 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SOFTWARE. 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * - 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * --Copyright-- 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/cdefs.h> 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/types.h> 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/param.h> 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/socket.h> 59c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk#include <sys/un.h> 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <netinet/in.h> 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <arpa/inet.h> 62569fb9887d00104509df79fa77d92e3cf9afe7dbCalin Juravle#include <arpa/nameser.h> 635240b562e7e9de2f31ba70f71c394c5529aadf0fPaul Jensen#include "NetdClientDispatch.h" 64ea9bf6788144b83cc51c454b2bfe6b980d6e947cSzymon Jakubczak#include "resolv_netid.h" 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "resolv_private.h" 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "resolv_cache.h" 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <assert.h> 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <ctype.h> 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <netdb.h> 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdarg.h> 729773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes#include <stdbool.h> 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 742cc2b2be692f1d559a09d2066e56e450249cc9c0Carl Shapiro#include <strings.h> 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <syslog.h> 76c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk#include <unistd.h> 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 78c20de902875dcaebde0ccd0b7a8351598f254d4cCalin Juravle#define ALIGNBYTES (sizeof(uintptr_t) - 1) 79c20de902875dcaebde0ccd0b7a8351598f254d4cCalin Juravle#define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) &~ ALIGNBYTES) 80c20de902875dcaebde0ccd0b7a8351598f254d4cCalin Juravle 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifndef LOG_AUTH 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project# define LOG_AUTH 0 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define MULTI_PTRS_ARE_ALIASES 1 /* XXX - experimental */ 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "nsswitch.h" 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <string.h> 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 9158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#include "hostent.h" 9258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 9358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#define maybe_ok(res, nm, ok) (((res)->options & RES_NOCHECKNAME) != 0U || \ 9458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (ok)(nm) != 0) 9558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#define maybe_hnok(res, hn) maybe_ok((res), (hn), res_hnok) 9658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#define maybe_dnok(res, dn) maybe_ok((res), (dn), res_dnok) 9758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 9858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#define addalias(d, s, arr, siz) do { \ 9958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (d >= &arr[siz]) { \ 10058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **xptr = realloc(arr, (siz + 10) * sizeof(*arr)); \ 10158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (xptr == NULL) \ 10258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; \ 10358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui d = xptr + (d - arr); \ 10458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui arr = xptr; \ 10558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui siz += 10; \ 10658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } \ 10758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *d++ = s; \ 10858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} while (/*CONSTCOND*/0) 10958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 11058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#define setup(arr, siz) do { \ 11158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui arr = malloc((siz = 10) * sizeof(*arr)); \ 11258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (arr == NULL) \ 11358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; \ 11458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} while (/*CONSTCOND*/0) 11558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 116c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk// This should be synchronized to ResponseCode.h 117c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falkstatic const int DnsProxyQueryResult = 222; 118c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 11968c2755d71750401d82d9aa17774ebd385cb5dc0Elliott Hughesstatic const char AskedForGot[] = 1201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project "gethostby*.getanswer: asked for \"%s\", got \"%s\""; 1211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 12250178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzstatic const struct android_net_context NETCONTEXT_UNSET = { 12350178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz .app_mark = MARK_UNSET, 12450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz .app_netid = NETID_UNSET, 12550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz .dns_mark = MARK_UNSET, 12650178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz .dns_netid = NETID_UNSET, 12750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz .uid = NET_CONTEXT_INVALID_UID 12850178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz}; 12950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz 13047fb0e826dd8c345d9034fda75c3238488a4690cBen Schwartz#define MAXPACKET (8*1024) 1311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttypedef union { 1331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project HEADER hdr; 1341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_char buf[MAXPACKET]; 1351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} querybuf; 1361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttypedef union { 1381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int32_t al; 1391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char ac; 1401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} align; 1411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef DEBUG 14358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistatic void debugprintf(const char *, res_state, ...) 1441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __attribute__((__format__(__printf__, 1, 3))); 1451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 1461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic struct hostent *getanswer(const querybuf *, int, const char *, int, 14758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_state, struct hostent *, char *, size_t, int *); 1481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void map_v4v6_address(const char *, char *); 1491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void map_v4v6_hostent(struct hostent *, char **, char *); 1501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void addrsort(char **, int, res_state); 1511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectvoid ht_sethostent(int); 1531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectvoid ht_endhostent(void); 1541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstruct hostent *ht_gethostbyname(char *); 1551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstruct hostent *ht_gethostbyaddr(const char *, int, int); 1561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectvoid dns_service(void); 1571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#undef dn_skipname 1581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint dn_skipname(const u_char *, const u_char *); 159e5c35e075fad5b5c143971c4401a360f6eaf5470Jim Huangstatic int _dns_gethtbyaddr(void *, void *, va_list); 160e5c35e075fad5b5c143971c4401a360f6eaf5470Jim Huangstatic int _dns_gethtbyname(void *, void *, va_list); 1611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 16258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistatic struct hostent *gethostbyname_internal(const char *, int, res_state, 163dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz struct hostent *, char *, size_t, int *, const struct android_net_context *); 16450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzstatic struct hostent* android_gethostbyaddrfornetcontext_proxy_internal(const void*, socklen_t, 16550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz int, struct hostent *, char *, size_t, int *, const struct android_net_context *); 1661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const ns_src default_dns_files[] = { 1681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { NSSRC_FILES, NS_SUCCESS }, 1691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { NSSRC_DNS, NS_SUCCESS }, 1701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 0, 0 } 1711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project}; 1721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 173bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughesstatic int h_errno_to_result(int* herrno_p) { 174bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes // glibc considers ERANGE a special case (and BSD uses ENOSPC instead). 175bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes if (*herrno_p == NETDB_INTERNAL && errno == ENOSPC) { 176bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes errno = ERANGE; 177bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes return errno; 178bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes } 179bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes // glibc considers HOST_NOT_FOUND not an error for the _r functions' return value. 180bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes return (*herrno_p != HOST_NOT_FOUND) ? *herrno_p : 0; 181bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes} 1821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef DEBUG 1841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void 18558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuidebugprintf(const char *msg, res_state res, ...) 1861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 18758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(msg != NULL); 1881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->options & RES_DEBUG) { 1901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int save = errno; 1911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project va_list ap; 1921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project va_start (ap, res); 1941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project vprintf(msg, ap); 1951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project va_end (ap); 1961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = save; 1981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 2001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 20158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui# define debugprintf(msg, res, num) /*nada*/ 2021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 2031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define BOUNDED_INCR(x) \ 2051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project do { \ 20687c0dba7b1b1754d69cc92f2b400a311d6393eedElliott Hughes BOUNDS_CHECK(cp, x); \ 2071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += (x); \ 2081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } while (/*CONSTCOND*/0) 2091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define BOUNDS_CHECK(ptr, count) \ 2111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project do { \ 21287c0dba7b1b1754d69cc92f2b400a311d6393eedElliott Hughes if (eom - (ptr) < (count)) \ 21358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; \ 2141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } while (/*CONSTCOND*/0) 2151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic struct hostent * 2171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectgetanswer(const querybuf *answer, int anslen, const char *qname, int qtype, 21858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_state res, struct hostent *hent, char *buf, size_t buflen, int *he) 2191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 2201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const HEADER *hp; 2211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const u_char *cp; 2221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int n; 22358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t qlen; 2241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const u_char *eom, *erdata; 2251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *bp, **ap, **hap, *ep; 2261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int type, class, ancount, qdcount; 2271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int haveanswer, had_error; 2281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int toobig = 0; 2291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char tbuf[MAXDNAME]; 23058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **aliases; 23158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t maxaliases; 23258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *addr_ptrs[MAXADDRS]; 2331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *tname; 2341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int (*name_ok)(const char *); 2351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 23658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(answer != NULL); 23758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(qname != NULL); 2381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 2391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tname = qname; 24058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = NULL; 2411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project eom = answer->buf + anslen; 2421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (qtype) { 2431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_A: 2441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_AAAA: 2451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project name_ok = res_hnok; 2461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_PTR: 2481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project name_ok = res_dnok; 2491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 2501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 25158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NO_RECOVERY; 2521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; /* XXX should be abort(); */ 2531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 25458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 25558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui setup(aliases, maxaliases); 2561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 2571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * find first satisfactory answer 2581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 2591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hp = &answer->hdr; 2601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ancount = ntohs(hp->ancount); 2611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project qdcount = ntohs(hp->qdcount); 26258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui bp = buf; 26358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ep = buf + buflen; 2641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp = answer->buf; 2651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project BOUNDED_INCR(HFIXEDSZ); 26658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (qdcount != 1) 26758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 26858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 26958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = dn_expand(answer->buf, eom, cp, bp, (int)(ep - bp)); 27058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((n < 0) || !maybe_ok(res, bp, name_ok)) 27158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 27258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 2731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project BOUNDED_INCR(n + QFIXEDSZ); 2741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (qtype == T_A || qtype == T_AAAA) { 2751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* res_send() has already verified that the query name is the 2761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * same as the one we sent; this just gets the expanded name 2771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * (i.e., with the succeeding search-domain tacked on). 2781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 27958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(bp) + 1; /* for the \0 */ 28058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (n >= MAXHOSTNAMELEN) 28158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 28258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 2831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 2841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* The qname can be abbreviated, but h_name is now absolute. */ 28558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui qname = hent->h_name; 2861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 28758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_aliases = ap = aliases; 28858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_addr_list = hap = addr_ptrs; 2891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *ap = NULL; 2901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *hap = NULL; 2911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project haveanswer = 0; 2921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error = 0; 2931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project while (ancount-- > 0 && cp < eom && !had_error) { 29458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = dn_expand(answer->buf, eom, cp, bp, (int)(ep - bp)); 29558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((n < 0) || !maybe_ok(res, bp, name_ok)) { 2961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 2971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 2981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; /* name */ 3001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ); 3011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project type = _getshort(cp); 3021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += INT16SZ; /* type */ 3031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project class = _getshort(cp); 3041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += INT16SZ + INT32SZ; /* class, TTL */ 3051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project n = _getshort(cp); 3061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += INT16SZ; /* len */ 3071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project BOUNDS_CHECK(cp, n); 3081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project erdata = cp + n; 3091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (class != C_IN) { 3101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* XXX - debug? syslog? */ 3111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 3121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; /* XXX - had_error++ ? */ 3131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) { 31558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = dn_expand(answer->buf, eom, cp, tbuf, 31658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (int)sizeof tbuf); 31758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((n < 0) || !maybe_ok(res, tbuf, name_ok)) { 3181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 32258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != erdata) 32358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 3241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Store alias. */ 32558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addalias(ap, bp, aliases, maxaliases); 32658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(bp) + 1; /* for the \0 */ 3271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n >= MAXHOSTNAMELEN) { 3281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 3321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Get canonical name. */ 33358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(tbuf) + 1; /* for the \0 */ 3341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n > ep - bp || n >= MAXHOSTNAMELEN) { 3351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(bp, tbuf, (size_t)(ep - bp)); 33958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 3401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 3411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (qtype == T_PTR && type == T_CNAME) { 34458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = dn_expand(answer->buf, eom, cp, tbuf, 34558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (int)sizeof tbuf); 34658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (n < 0 || !maybe_dnok(res, tbuf)) { 3471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 35158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != erdata) 35258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 3531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Get canonical name. */ 35458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(tbuf) + 1; /* for the \0 */ 3551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n > ep - bp || n >= MAXHOSTNAMELEN) { 3561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(bp, tbuf, (size_t)(ep - bp)); 3601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tname = bp; 3611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 3621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 3631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (type != qtype) { 3651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (type != T_KEY && type != T_SIG) 3661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project syslog(LOG_NOTICE|LOG_AUTH, 3671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"", 3681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project qname, p_class(C_IN), p_type(qtype), 3691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project p_type(type)); 3701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 3711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; /* XXX - had_error++ ? */ 3721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (type) { 3741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_PTR: 3751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (strcasecmp(tname, bp) != 0) { 3761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project syslog(LOG_NOTICE|LOG_AUTH, 3771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project AskedForGot, qname, bp); 3781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 3791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; /* XXX - had_error++ ? */ 3801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 38158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = dn_expand(answer->buf, eom, cp, bp, (int)(ep - bp)); 38258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((n < 0) || !maybe_hnok(res, bp)) { 3831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 3861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#if MULTI_PTRS_ARE_ALIASES 3871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 38858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != erdata) 38958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 3901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!haveanswer) 39158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 3921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 39358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addalias(ap, bp, aliases, maxaliases); 3941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n != -1) { 39558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(bp) + 1; /* for the \0 */ 3961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n >= MAXHOSTNAMELEN) { 3971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 3981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 3991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 4011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 4031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 40458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 4051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->options & RES_USE_INET6) { 4061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project n = strlen(bp) + 1; /* for the \0 */ 4071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n >= MAXHOSTNAMELEN) { 4081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 4091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 4101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 41258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map_v4v6_hostent(hent, &bp, ep); 4131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 41458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto success; 4151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 4161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_A: 4171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case T_AAAA: 41858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (strcasecmp(hent->h_name, bp) != 0) { 4191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project syslog(LOG_NOTICE|LOG_AUTH, 42058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui AskedForGot, hent->h_name, bp); 4211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 4221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; /* XXX - had_error++ ? */ 4231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 42458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (n != hent->h_length) { 4251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 4261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 4271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (type == T_AAAA) { 4291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct in6_addr in6; 43058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memcpy(&in6, cp, NS_IN6ADDRSZ); 4311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (IN6_IS_ADDR_V4MAPPED(&in6)) { 4321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 4331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 4341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!haveanswer) { 4371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int nn; 4381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 43958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 44058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui nn = (int)strlen(bp) + 1; /* for the \0 */ 4411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += nn; 4421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 4441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += sizeof(align) - 4451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (size_t)((u_long)bp % sizeof(align)); 4461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 44758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (bp + n >= ep) { 44858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui debugprintf("size (%d) too big\n", res, n); 4491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project had_error++; 4501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 4511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 45258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hap >= &addr_ptrs[MAXADDRS - 1]) { 45358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!toobig++) { 45458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui debugprintf("Too many addresses (%d)\n", 4551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res, MAXADDRS); 45658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 4571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 4581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 4591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (void)memcpy(*hap++ = bp, cp, (size_t)n); 4611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 4621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cp += n; 46358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != erdata) 46458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto no_recovery; 4651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 4661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 4671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project abort(); 4681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!had_error) 4701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project haveanswer++; 4711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (haveanswer) { 4731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *ap = NULL; 4741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *hap = NULL; 4751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 4761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Note: we sort even if host can take only one address 4771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * in its return structures - should give it the "best" 4781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * address in that case, not some random one 4791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 4801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->nsort && haveanswer > 1 && qtype == T_A) 48158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addrsort(addr_ptrs, haveanswer, res); 48258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!hent->h_name) { 48358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)strlen(qname) + 1; /* for the \0 */ 4841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n > ep - bp || n >= MAXHOSTNAMELEN) 4851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project goto no_recovery; 4861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(bp, qname, (size_t)(ep - bp)); 48758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_name = bp; 4881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project bp += n; 4891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 4901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->options & RES_USE_INET6) 49158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map_v4v6_hostent(hent, &bp, ep); 49258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto success; 4931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 49458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuino_recovery: 49558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 49658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NO_RECOVERY; 49758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 49858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuisuccess: 49958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui bp = (char *)ALIGN(bp); 50058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)(ap - aliases); 50158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui qlen = (n + 1) * sizeof(*hent->h_aliases); 50258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((size_t)(ep - bp) < qlen) 50358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 50458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_aliases = (void *)bp; 50558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memcpy(bp, aliases, qlen); 50658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 50758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui aliases = NULL; 50858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 50958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui bp += qlen; 51058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = (int)(hap - addr_ptrs); 51158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui qlen = (n + 1) * sizeof(*hent->h_addr_list); 51258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((size_t)(ep - bp) < qlen) 51358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 51458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_addr_list = (void *)bp; 51558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memcpy(bp, addr_ptrs, qlen); 51658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 51758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hent; 51858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 51958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 52058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = ENOSPC; 52158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 5221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 5231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 5241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 52558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/* The prototype of gethostbyname_r is from glibc, not that in netbsd. */ 5261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint 5271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectgethostbyname_r(const char *name, struct hostent *hp, char *buf, size_t buflen, 52858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent **result, int *errorp) 5291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 5301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res_state res = __res_get_state(); 53158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res == NULL) { 532bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes *result = NULL; 53358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *errorp = NETDB_INTERNAL; 53458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return -1; 53558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 5361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 53758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(name != NULL); 5381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 5391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->options & RES_USE_INET6) { 540dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz *result = gethostbyname_internal(name, AF_INET6, res, hp, buf, buflen, errorp, 541dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz &NETCONTEXT_UNSET); 54258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*result) { 5431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 54458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return 0; 5451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 5461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 547dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz *result = gethostbyname_internal(name, AF_INET, res, hp, buf, buflen, errorp, 548dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz &NETCONTEXT_UNSET); 549bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes return h_errno_to_result(errorp); 550c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk} 551c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 55258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/* The prototype of gethostbyname2_r is from glibc, not that in netbsd. */ 55358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiint 55458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyname2_r(const char *name, int af, struct hostent *hp, char *buf, 55558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t buflen, struct hostent **result, int *errorp) 556c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 5571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res_state res = __res_get_state(); 55858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res == NULL) { 55958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *result = NULL; 56058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *errorp = NETDB_INTERNAL; 56158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return -1; 56258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 563dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz *result = gethostbyname_internal(name, af, res, hp, buf, buflen, errorp, 564dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz &NETCONTEXT_UNSET); 565bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes return h_errno_to_result(errorp); 5661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 5671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 5689773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes__LIBC_HIDDEN__ FILE* android_open_proxy() { 5699773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes const char* cache_mode = getenv("ANDROID_DNS_MODE"); 5709773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes bool use_proxy = (cache_mode == NULL || strcmp(cache_mode, "local") != 0); 5719773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (!use_proxy) { 5729773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 5739773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes } 574c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 5759773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes int s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0); 5769773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (s == -1) { 577c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk return NULL; 578c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 579c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 5809773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes const int one = 1; 5819773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); 5829773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 5839773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes struct sockaddr_un proxy_addr; 584c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk memset(&proxy_addr, 0, sizeof(proxy_addr)); 585c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk proxy_addr.sun_family = AF_UNIX; 586c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk strlcpy(proxy_addr.sun_path, "/dev/socket/dnsproxyd", sizeof(proxy_addr.sun_path)); 5879773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 5889773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (TEMP_FAILURE_RETRY(connect(s, (const struct sockaddr*) &proxy_addr, sizeof(proxy_addr))) != 0) { 5899773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes close(s); 590c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk return NULL; 591c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 592c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 5939773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return fdopen(s, "r+"); 594c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk} 595c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 596c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falkstatic struct hostent * 59758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiandroid_read_hostent(FILE* proxy, struct hostent* hp, char* hbuf, size_t hbuflen, int *he) 598c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 599c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk uint32_t size; 600c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk char buf[4]; 601c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(buf, 1, sizeof(buf), proxy) != sizeof(buf)) return NULL; 602c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 6039773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // This is reading serialized data from system/netd/server/DnsProxyListener.cpp 6049773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // and changes here need to be matched there. 605c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk int result_code = strtol(buf, NULL, 10); 606c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (result_code != DnsProxyQueryResult) { 607c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk fread(&size, 1, sizeof(size), proxy); 60858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = HOST_NOT_FOUND; 609c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk return NULL; 610c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 611c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 612c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(&size, 1, sizeof(size), proxy) != sizeof(size)) return NULL; 613c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk size = ntohl(size); 614c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 61558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memset(hp, 0, sizeof(*hp)); 61658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *ptr = hbuf; 61758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *hbuf_end = hbuf + hbuflen; 61858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 61958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ptr + size > hbuf_end) { 62058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 62158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 622c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(ptr, 1, size, proxy) != size) return NULL; 62358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_name = ptr; 624c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk ptr += size; 625c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 62658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *aliases_ptrs[MAXALIASES]; 62758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **aliases = &aliases_ptrs[0]; 62858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 629c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk while (1) { 630c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(&size, 1, sizeof(size), proxy) != sizeof(size)) return NULL; 631c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk size = ntohl(size); 632c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 633c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (size == 0) { 634c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk *aliases = NULL; 635c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk break; 636c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 63758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ptr + size > hbuf_end) { 63858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 63958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 640c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(ptr, 1, size, proxy) != size) return NULL; 64158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (aliases < &aliases_ptrs[MAXALIASES - 1]) { 64258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *aliases++ = ptr; 64358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 644c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk ptr += size; 645c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 646c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 64765dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes // Fix alignment after variable-length data. 64865dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes ptr = (char*)ALIGN(ptr); 64965dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes 65058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int aliases_len = ((int)(aliases - aliases_ptrs) + 1) * sizeof(*hp->h_aliases); 65158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ptr + aliases_len > hbuf_end) { 65258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 65358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 65458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_aliases = (void*)ptr; 65558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memcpy(ptr, aliases_ptrs, aliases_len); 65658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ptr += aliases_len; 65758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 658c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(&size, 1, sizeof(size), proxy) != sizeof(size)) return NULL; 65958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addrtype = ntohl(size); 660c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 661c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(&size, 1, sizeof(size), proxy) != sizeof(size)) return NULL; 66258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = ntohl(size); 66358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 66458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *addr_ptrs[MAXADDRS]; 66558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **addr_p = &addr_ptrs[0]; 666c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 667c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk while (1) { 668c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(&size, 1, sizeof(size), proxy) != sizeof(size)) return NULL; 669c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk size = ntohl(size); 670c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (size == 0) { 67158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *addr_p = NULL; 672c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk break; 673c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 67458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ptr + size > hbuf_end) { 67558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 67658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 677c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fread(ptr, 1, size, proxy) != size) return NULL; 67858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (addr_p < &addr_ptrs[MAXADDRS - 1]) { 67958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *addr_p++ = ptr; 68058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 681c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk ptr += size; 682c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 683c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 68465dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes // Fix alignment after variable-length data. 68565dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes ptr = (char*)ALIGN(ptr); 68665dd858239c4e32a5a1afbc14ac30dbcdd2a50a3Elliott Hughes 68758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int addrs_len = ((int)(addr_p - addr_ptrs) + 1) * sizeof(*hp->h_addr_list); 68858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ptr + addrs_len > hbuf_end) { 68958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 69058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 69158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list = (void*)ptr; 69258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memcpy(ptr, addr_ptrs, addrs_len); 69358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 69458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hp; 695c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 69658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 69758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 69858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = ENOSPC; 69958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 70058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 701c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 7021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic struct hostent * 70358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyname_internal_real(const char *name, int af, res_state res, struct hostent *hp, char *buf, 70458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t buflen, int *he) 7051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 7061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *cp; 70758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr info; 70858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char hbuf[MAXHOSTNAMELEN]; 70958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t size; 7101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project static const ns_dtab dtab[] = { 71158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_FILES_CB(_hf_gethtbyname, NULL) 7121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { NSSRC_DNS, _dns_gethtbyname, NULL }, /* force -DHESIOD */ 71358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_NIS_CB(_yp_gethtbyname, NULL) 71458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_NULL_CB 7151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project }; 7161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 71758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(name != NULL); 7181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 7191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (af) { 7201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 72158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size = NS_INADDRSZ; 7221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 72458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size = NS_IN6ADDRSZ; 7251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 72758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 7281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EAFNOSUPPORT; 7291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 7301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 73158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (buflen < size) 73258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 7331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 73458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addrtype = af; 73558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = (int)size; 7361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 7371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 7381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * if there aren't any dots, it could be a user-level alias. 7391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * this is also done in res_nquery() since we are not the only 7401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * function that looks up host names. 7411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 74258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!strchr(name, '.') && (cp = res_hostalias(res, name, 74358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hbuf, sizeof(hbuf)))) 7441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project name = cp; 7451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 7461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 7471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * disallow names consisting only of digits/dots, unless 7481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * they end in a dot. 7491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 7501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (isdigit((u_char) name[0])) 7511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (cp = name;; ++cp) { 7521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!*cp) { 7531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (*--cp == '.') 7541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 7561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All-numeric, no dot at the end. 7571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Fake up a hostent as if we'd actually 7581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * done a lookup. 7591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 76058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto fake; 7611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 7621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!isdigit((u_char) *cp) && *cp != '.') 7631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 7651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((isxdigit((u_char) name[0]) && strchr(name, ':') != NULL) || 7661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project name[0] == ':') 7671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (cp = name;; ++cp) { 7681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!*cp) { 7691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (*--cp == '.') 7701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 7721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All-IPv6-legal, no dot at the end. 7731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Fake up a hostent as if we'd actually 7741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * done a lookup. 7751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 77658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto fake; 7771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 7781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!isxdigit((u_char) *cp) && *cp != ':' && *cp != '.') 7791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 7801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 7811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 78258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 78358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.hp = hp; 78458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.buf = buf; 78558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.buflen = buflen; 78658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.he = he; 78758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (nsdispatch(&info, dtab, NSDB_HOSTS, "gethostbyname", 78858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui default_dns_files, name, strlen(name), af) != NS_SUCCESS) 78958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 79058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 79158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hp; 79258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 79358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 79458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = ENOSPC; 79558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 79658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuifake: 79758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hp->h_addr_list, 1, buf, buflen); 79858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hp->h_aliases, 0, buf, buflen); 79958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 80058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_aliases[0] = NULL; 80158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (size > buflen) 80258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 80358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 80458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (inet_pton(af, name, buf) <= 0) { 80558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = HOST_NOT_FOUND; 8061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 807c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 80858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list[0] = buf; 80958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list[1] = NULL; 81058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui buf += size; 81158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui buflen -= size; 81258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_SCOPY(hp->h_name, name, buf, buflen); 81358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res->options & RES_USE_INET6) 81458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map_v4v6_hostent(hp, &buf, buf + buflen); 81558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 8161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return hp; 8171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 8181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 819c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk// very similar in proxy-ness to android_getaddrinfo_proxy 820c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falkstatic struct hostent * 82158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyname_internal(const char *name, int af, res_state res, struct hostent *hp, char *hbuf, 822dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz size_t hbuflen, int *errorp, const struct android_net_context *netcontext) 823c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 8249773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes FILE* proxy = android_open_proxy(); 8259773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (proxy == NULL) { 8269773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // Either we're not supposed to be using the proxy or the proxy is unavailable. 82790a83beb4dd3a70aeb512a786e9a79bbd641f4deBen Schwartz res_setnetcontext(res, netcontext); 82858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return gethostbyname_internal_real(name, af, res, hp, hbuf, hbuflen, errorp); 829c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 830c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 831dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz unsigned netid = __netdClientDispatch.netIdForResolv(netcontext->app_netid); 8325240b562e7e9de2f31ba70f71c394c5529aadf0fPaul Jensen 8339773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // This is writing to system/netd/server/DnsProxyListener.cpp and changes 8349773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // here need to be matched there. 835ea9bf6788144b83cc51c454b2bfe6b980d6e947cSzymon Jakubczak if (fprintf(proxy, "gethostbyname %u %s %d", 836ea9bf6788144b83cc51c454b2bfe6b980d6e947cSzymon Jakubczak netid, 837c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk name == NULL ? "^" : name, 838c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk af) < 0) { 839c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk fclose(proxy); 8409773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 841c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 842c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 843c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk if (fputc(0, proxy) == EOF || fflush(proxy) != 0) { 844c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk fclose(proxy); 8459773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 846c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk } 8479773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 84858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent* result = android_read_hostent(proxy, hp, hbuf, hbuflen, errorp); 8499773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes fclose(proxy); 850c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk return result; 851c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk} 852c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk 85358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/* The prototype of gethostbyaddr_r is from glibc, not that in netbsd. */ 85458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiint gethostbyaddr_r(const void *addr, socklen_t len, int af, struct hostent *hp, char *buf, 85558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t buflen, struct hostent **result, int *h_errnop) 85658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 85750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz *result = android_gethostbyaddrfornetcontext_proxy_internal( 85850178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz addr, len, af, hp, buf, buflen, h_errnop, &NETCONTEXT_UNSET); 859bb7d9fb5d438c7477c404f97e07e145d49335947Elliott Hughes return h_errno_to_result(h_errnop); 86058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 8619773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 8629773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughesstatic struct hostent * 86350178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzandroid_gethostbyaddrfornetcontext_real(const void *addr, socklen_t len, int af, struct hostent *hp, 86450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz char *buf, size_t buflen, int *he, 86550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context *netcontext) 86658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 8671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const u_char *uaddr = (const u_char *)addr; 8681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project socklen_t size; 86958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr info; 8701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project static const ns_dtab dtab[] = { 87158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_FILES_CB(_hf_gethtbyaddr, NULL) 8721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { NSSRC_DNS, _dns_gethtbyaddr, NULL }, /* force -DHESIOD */ 87358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_NIS_CB(_yp_gethtbyaddr, NULL) 87458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui NS_NULL_CB 8751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project }; 8761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 87758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(addr != NULL); 8781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 8793e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes if (af == AF_INET6 && len == NS_IN6ADDRSZ && 8803e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes (IN6_IS_ADDR_LINKLOCAL((const struct in6_addr *)addr) || 8813e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes IN6_IS_ADDR_SITELOCAL((const struct in6_addr *)addr))) { 88258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = HOST_NOT_FOUND; 8831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 8841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 8853e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes if (af == AF_INET6 && len == NS_IN6ADDRSZ && 8863e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes (IN6_IS_ADDR_V4MAPPED((const struct in6_addr *)addr) || 8873e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes IN6_IS_ADDR_V4COMPAT((const struct in6_addr *)addr))) { 8881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Unmap. */ 8893e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes uaddr += NS_IN6ADDRSZ - NS_INADDRSZ; 8903e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes addr = uaddr; 8911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project af = AF_INET; 8923e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes len = NS_INADDRSZ; 8931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 8941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (af) { 8951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 8963e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes size = NS_INADDRSZ; 8971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 8981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 8993e5f0c9849bf09ad9a5b1999430aec796276d9f6Elliott Hughes size = NS_IN6ADDRSZ; 9001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 9011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 9021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EAFNOSUPPORT; 90358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 9041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 9051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 9061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (size != len) { 9071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EINVAL; 90858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 9091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 9101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 91158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.hp = hp; 91258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.buf = buf; 91358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.buflen = buflen; 91458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info.he = he; 91558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 91658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (nsdispatch(&info, dtab, NSDB_HOSTS, "gethostbyaddr", 91750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz default_dns_files, uaddr, len, af, netcontext) != NS_SUCCESS) 9181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 91958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 9201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return hp; 9211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 9221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 92358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistatic struct hostent* 92450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzandroid_gethostbyaddrfornetcontext_proxy_internal(const void* addr, socklen_t len, int af, 92558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *hp, char *hbuf, size_t hbuflen, int *he, 92650178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context *netcontext) 92758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 9289773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes FILE* proxy = android_open_proxy(); 9299773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (proxy == NULL) { 9309773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes // Either we're not supposed to be using the proxy or the proxy is unavailable. 93150178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return android_gethostbyaddrfornetcontext_real(addr,len, af, hp, hbuf, hbuflen, he, netcontext); 9329773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes } 9339773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 9349773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes char buf[INET6_ADDRSTRLEN]; //big enough for IPv4 and IPv6 9359773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes const char * addrStr = inet_ntop(af, addr, buf, sizeof(buf)); 9369773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (addrStr == NULL) { 9379773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes fclose(proxy); 9389773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 9399773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes } 9409773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 94150178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz unsigned netid = __netdClientDispatch.netIdForResolv(netcontext->app_netid); 9429773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 9439773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (fprintf(proxy, "gethostbyaddr %s %d %d %u", 9449773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes addrStr, len, af, netid) < 0) { 9459773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes fclose(proxy); 9469773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 9479773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes } 9489773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 9499773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes if (fputc(0, proxy) == EOF || fflush(proxy) != 0) { 9509773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes fclose(proxy); 9519773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return NULL; 9529773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes } 9539773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 95458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *result = android_read_hostent(proxy, hp, hbuf, hbuflen, he); 9559773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes fclose(proxy); 9569773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes return result; 9579773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes} 9589773fa3ffd7c2d1de2431b8ea1eb8043e8959fcbElliott Hughes 95958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent* 96058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinetbsd_gethostent_r(FILE *hf, struct hostent *hent, char *buf, size_t buflen, int *he) 961c63e59039d28c352e3053bb81319e960c392dbd4Mattias Falk{ 96258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *p, *name; 9631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *cp, **q; 9641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int af, len; 96558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t anum; 96658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **aliases; 96758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t maxaliases; 96858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct in6_addr host_addr; 9691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 97058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hf == NULL) { 97158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 97258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = EINVAL; 9731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 9741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 97558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui p = NULL; 97658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui setup(aliases, maxaliases); 97758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 97858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* Allocate a new space to read file lines like upstream does. 97958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * To keep reentrancy we cannot use __res_get_static()->hostbuf here, 98058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * as the buffer may be used to store content for a previous hostent 98158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * returned by non-reentrant functions like gethostbyname(). 98258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui */ 98358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui const size_t line_buf_size = sizeof(__res_get_static()->hostbuf); 98458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((p = malloc(line_buf_size)) == NULL) { 98558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 9861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 98758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui for (;;) { 98858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!fgets(p, line_buf_size, hf)) { 98958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(p); 99058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 99158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = HOST_NOT_FOUND; 9921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NULL; 99358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 99458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*p == '#') { 9951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 9961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 99758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!(cp = strpbrk(p, "#\n"))) { 9981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 9991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 100058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp = '\0'; 100158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!(cp = strpbrk(p, " \t"))) 100258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 100358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 100458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (inet_pton(AF_INET6, p, &host_addr) > 0) { 100558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui af = AF_INET6; 100658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui len = NS_IN6ADDRSZ; 100758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } else { 100858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (inet_pton(AF_INET, p, &host_addr) <= 0) 100958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 10101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 101158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_state res = __res_get_state(); 101258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res == NULL) 101358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 101458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res->options & RES_USE_INET6) { 101558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map_v4v6_address(buf, buf); 101658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui af = AF_INET6; 101758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui len = NS_IN6ADDRSZ; 101858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } else { 101958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui af = AF_INET; 102058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui len = NS_INADDRSZ; 10211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 102258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui __res_put_state(res); 10231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 10241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 102558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* if this is not something we're looking for, skip it. */ 102658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hent->h_addrtype != 0 && hent->h_addrtype != af) 102758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 102858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hent->h_length != 0 && hent->h_length != len) 102958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 10301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 103158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui while (*cp == ' ' || *cp == '\t') 103258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 103358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((cp = strpbrk(name = cp, " \t")) != NULL) 103458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 103558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui q = aliases; 103658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui while (cp && *cp) { 103758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*cp == ' ' || *cp == '\t') { 103858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 103958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 104058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 104158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addalias(q, cp, aliases, maxaliases); 104258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if ((cp = strpbrk(cp, " \t")) != NULL) 104358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 104458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 104558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 10461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 104758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_length = len; 104858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_addrtype = af; 104958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hent->h_addr_list, 1, buf, buflen); 105058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui anum = (size_t)(q - aliases); 105158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hent->h_aliases, anum, buf, buflen); 105258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_COPY(hent->h_addr_list[0], &host_addr, hent->h_length, buf, 105358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui buflen); 105458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_addr_list[1] = NULL; 105558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 105658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_SCOPY(hent->h_name, name, buf, buflen); 105758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui for (size_t i = 0; i < anum; i++) 105858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_SCOPY(hent->h_aliases[i], aliases[i], buf, buflen); 105958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hent->h_aliases[anum] = NULL; 106058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 106158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_SUCCESS; 106258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(p); 106358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 106458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hent; 106558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 106658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(p); 106758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 106858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = ENOSPC; 106958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *he = NETDB_INTERNAL; 107058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 10711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 10721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 10731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void 10741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectmap_v4v6_address(const char *src, char *dst) 10751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 10761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u_char *p = (u_char *)dst; 107758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char tmp[NS_INADDRSZ]; 10781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int i; 10791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 108058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(src != NULL); 108158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(dst != NULL); 10821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 10831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Stash a temporary copy so our caller can update in place. */ 108458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (void)memcpy(tmp, src, NS_INADDRSZ); 10851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Mark this ipv6 addr as a mapped ipv4. */ 10861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (i = 0; i < 10; i++) 10871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *p++ = 0x00; 10881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *p++ = 0xff; 10891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *p++ = 0xff; 10901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Retrieve the saved copy and we're done. */ 109158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (void)memcpy(p, tmp, NS_INADDRSZ); 10921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 10931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 10941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void 10951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectmap_v4v6_hostent(struct hostent *hp, char **bpp, char *ep) 10961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 10971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char **ap; 10981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 109958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(hp != NULL); 110058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(bpp != NULL); 110158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(ep != NULL); 11021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 110358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hp->h_addrtype != AF_INET || hp->h_length != NS_INADDRSZ) 11041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return; 11051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hp->h_addrtype = AF_INET6; 110658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = NS_IN6ADDRSZ; 11071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (ap = hp->h_addr_list; *ap; ap++) { 110858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int i = (int)(sizeof(align) - 110958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (size_t)((u_long)*bpp % sizeof(align))); 11101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 111158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (ep - *bpp < (i + NS_IN6ADDRSZ)) { 11121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Out of memory. Truncate address list here. XXX */ 11131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *ap = NULL; 11141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return; 11151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *bpp += i; 11171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project map_v4v6_address(*ap, *bpp); 11181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *ap = *bpp; 111958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *bpp += NS_IN6ADDRSZ; 11201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 11221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic void 11241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectaddrsort(char **ap, int num, res_state res) 11251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 11261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int i, j; 11271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char **p; 11281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project short aval[MAXADDRS]; 11291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int needsort = 0; 11301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 113158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(ap != NULL); 11321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project p = ap; 11341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (i = 0; i < num; i++, p++) { 11351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (j = 0 ; (unsigned)j < res->nsort; j++) 11361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res->sort_list[j].addr.s_addr == 11371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (((struct in_addr *)(void *)(*p))->s_addr & 11381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res->sort_list[j].mask)) 11391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 11401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project aval[i] = j; 11411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (needsort == 0 && i > 0 && j < aval[i-1]) 11421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project needsort = i; 11431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!needsort) 11451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return; 11461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project while (needsort < num) { 11481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (j = needsort - 1; j >= 0; j--) { 11491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (aval[j] > aval[j+1]) { 11501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *hp; 11511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project i = aval[j]; 11531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project aval[j] = aval[j+1]; 11541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project aval[j+1] = i; 11551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hp = ap[j]; 11571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ap[j] = ap[j+1]; 11581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ap[j+1] = hp; 11591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else 11601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 11611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project needsort++; 11631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 11651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*ARGSUSED*/ 1167e5c35e075fad5b5c143971c4401a360f6eaf5470Jim Huangstatic int 11681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project_dns_gethtbyname(void *rv, void *cb_data, va_list ap) 11691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 11701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project querybuf *buf; 11711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int n, type; 11721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct hostent *hp; 11731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *name; 11741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res_state res; 117558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr *info = rv; 11761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 117758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(rv != NULL); 11781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 11791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project name = va_arg(ap, char *); 118058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* NOSTRICT skip string len */(void)va_arg(ap, int); 118158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->hp->h_addrtype = va_arg(ap, int); 11821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 118358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (info->hp->h_addrtype) { 11841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 118558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->hp->h_length = NS_INADDRSZ; 11861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project type = T_A; 11871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 11881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 118958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->hp->h_length = NS_IN6ADDRSZ; 11901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project type = T_AAAA; 11911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 11921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 11931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_UNAVAIL; 11941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 11951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project buf = malloc(sizeof(*buf)); 11961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (buf == NULL) { 119758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 11981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 11991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res = __res_get_state(); 12011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res == NULL) { 12021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 12031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 120558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = res_nsearch(res, name, C_IN, type, buf->buf, (int)sizeof(buf->buf)); 12061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n < 0) { 12071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 120858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui debugprintf("res_nsearch failed (%d)\n", res, n); 12091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 12101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 121258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = getanswer(buf, n, name, type, res, info->hp, info->buf, 121358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->buflen, info->he); 12141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 12151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 12161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (hp == NULL) 12177069256495ef8a38a16a39a8570800e9e5290004Yabin Cui switch (*info->he) { 12181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case HOST_NOT_FOUND: 12191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case TRY_AGAIN: 12211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_TRYAGAIN; 12221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 12231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_UNAVAIL; 12241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_SUCCESS; 12261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 12271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 12281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*ARGSUSED*/ 1229e5c35e075fad5b5c143971c4401a360f6eaf5470Jim Huangstatic int 12301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project_dns_gethtbyaddr(void *rv, void *cb_data, va_list ap) 12311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 12321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char qbuf[MAXDNAME + 1], *qp, *ep; 12331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int n; 12341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project querybuf *buf; 12351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct hostent *hp; 12361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const unsigned char *uaddr; 123758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int advance; 12381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res_state res; 123958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *bf; 124058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t blen; 124158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr *info = rv; 124250178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context *netcontext; 12431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 124458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(rv != NULL); 12451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 12461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project uaddr = va_arg(ap, unsigned char *); 124758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->hp->h_length = va_arg(ap, int); 124858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->hp->h_addrtype = va_arg(ap, int); 124950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz netcontext = va_arg(ap, const struct android_net_context *); 12501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 125158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (info->hp->h_addrtype) { 12521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 12531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (void)snprintf(qbuf, sizeof(qbuf), "%u.%u.%u.%u.in-addr.arpa", 12541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (uaddr[3] & 0xff), (uaddr[2] & 0xff), 12551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project (uaddr[1] & 0xff), (uaddr[0] & 0xff)); 12561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 12571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 12581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 12591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project qp = qbuf; 12601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ep = qbuf + sizeof(qbuf) - 1; 126158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui for (n = NS_IN6ADDRSZ - 1; n >= 0; n--) { 12621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project advance = snprintf(qp, (size_t)(ep - qp), "%x.%x.", 12631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project uaddr[n] & 0xf, 12641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ((unsigned int)uaddr[n] >> 4) & 0xf); 12651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (advance > 0 && qp + advance < ep) 12661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project qp += advance; 12671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else { 126858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 12691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (strlcat(qbuf, "ip6.arpa", sizeof(qbuf)) >= sizeof(qbuf)) { 127358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 12741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 12771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 127858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_UNAVAIL; 12791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 12811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project buf = malloc(sizeof(*buf)); 12821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (buf == NULL) { 128358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 12841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 12861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project res = __res_get_state(); 12871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (res == NULL) { 12881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 12891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 129190a83beb4dd3a70aeb512a786e9a79bbd641f4deBen Schwartz res_setnetcontext(res, netcontext); 129258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui n = res_nquery(res, qbuf, C_IN, T_PTR, buf->buf, (int)sizeof(buf->buf)); 12931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (n < 0) { 12941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 129558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui debugprintf("res_nquery failed (%d)\n", res, n); 12961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 12971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 12981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 129958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = getanswer(buf, n, qbuf, T_PTR, res, info->hp, info->buf, 130058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui info->buflen, info->he); 13011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project free(buf); 13021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (hp == NULL) { 13031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 130458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (*info->he) { 13051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case HOST_NOT_FOUND: 13061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_NOTFOUND; 13071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case TRY_AGAIN: 13081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_TRYAGAIN; 13091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 13101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_UNAVAIL; 13111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 13121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 131358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 131458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui bf = (void *)(hp->h_addr_list + 2); 131558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui blen = (size_t)(bf - info->buf); 131658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (blen + info->hp->h_length > info->buflen) 131758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 131858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list[0] = bf; 131958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list[1] = NULL; 132058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (void)memcpy(bf, uaddr, (size_t)info->hp->h_length); 132158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (info->hp->h_addrtype == AF_INET && (res->options & RES_USE_INET6)) { 132258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (blen + NS_IN6ADDRSZ > info->buflen) 132358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nospc; 132458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map_v4v6_address(bf, bf); 13251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project hp->h_addrtype = AF_INET6; 132658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = NS_IN6ADDRSZ; 13271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 13281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 13291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __res_put_state(res); 133058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_SUCCESS; 133158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_SUCCESS; 133258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 13337069256495ef8a38a16a39a8570800e9e5290004Yabin Cui errno = ENOSPC; 133458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 133558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_UNAVAIL; 133658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 133758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 133858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#ifdef YP 133958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/*ARGSUSED*/ 134058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistatic struct hostent * 134158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui_yp_hostent(char *line, int af, struct getnamaddr *info) 134258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 134358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct in6_addr host_addrs[MAXADDRS]; 134458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char **aliases; 134558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t maxaliases; 134658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *p = line; 134758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *cp, **q, *ptr; 134858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t len, anum, i; 134958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int addrok; 135058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int more; 135158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui size_t naddrs; 135258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *hp = info->hp; 135358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 135458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(line != NULL); 135558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 135658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_name = NULL; 135758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addrtype = af; 135858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (af) { 135958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui case AF_INET: 136058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = NS_INADDRSZ; 136158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 136258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui case AF_INET6: 136358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_length = NS_IN6ADDRSZ; 136458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 136558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui default: 136658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 136758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 136858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui setup(aliases, maxaliases); 136958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui naddrs = 0; 137058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui q = aliases; 137158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 137258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinextline: 137358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* check for host_addrs overflow */ 137458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (naddrs >= __arraycount(host_addrs)) 137558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto done; 137658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 137758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui more = 0; 137858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp = strpbrk(p, " \t"); 137958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp == NULL) 138058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto done; 138158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 138258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 138358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* p has should have an address */ 138458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addrok = inet_pton(af, p, &host_addrs[naddrs]); 138558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (addrok != 1) { 138658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* skip to the next line */ 138758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui while (cp && *cp) { 138858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*cp == '\n') { 138958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 139058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nextline; 139158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 139258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 139358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 139458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto done; 139558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 139658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui naddrs++; 139758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 139858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui while (*cp == ' ' || *cp == '\t') 139958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 140058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui p = cp; 140158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp = strpbrk(p, " \t\n"); 140258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != NULL) { 140358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*cp == '\n') 140458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui more = 1; 140558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 140658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 140758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!hp->h_name) 140858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_name = p; 140958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui else if (strcmp(hp->h_name, p) == 0) 141058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ; 141158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui else 141258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addalias(q, p, aliases, maxaliases); 141358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui p = cp; 141458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (more) 141558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nextline; 141658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 141758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui while (cp && *cp) { 141858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*cp == ' ' || *cp == '\t') { 141958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 142058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui continue; 142158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 142258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (*cp == '\n') { 142358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp++; 142458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui goto nextline; 142558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 142658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui addalias(q, cp, aliases, maxaliases); 142758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui cp = strpbrk(cp, " \t"); 142858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (cp != NULL) 142958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *cp++ = '\0'; 143058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 143158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 143258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuidone: 143358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hp->h_name == NULL) { 143458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 143558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 143658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 143758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 143858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ptr = info->buf; 143958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui len = info->buflen; 144058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 144158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui anum = (size_t)(q - aliases); 144258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hp->h_addr_list, naddrs, ptr, len); 144358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_ARRAY(hp->h_aliases, anum, ptr, len); 144458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 144558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui for (i = 0; i < naddrs; i++) 144658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_COPY(hp->h_addr_list[i], &host_addrs[i], hp->h_length, 144758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ptr, len); 144858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_addr_list[naddrs] = NULL; 144958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 145058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_SCOPY(hp->h_name, hp->h_name, ptr, len); 145158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 145258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui for (i = 0; i < anum; i++) 145358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui HENT_SCOPY(hp->h_aliases[i], aliases[i], ptr, len); 145458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp->h_aliases[anum] = NULL; 145558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 145658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 145758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hp; 145858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuinospc: 145958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(aliases); 146058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = NETDB_INTERNAL; 146158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui errno = ENOSPC; 146258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 146358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 146458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 146558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/*ARGSUSED*/ 146658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiint 146758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui_yp_gethtbyaddr(void *rv, void *cb_data, va_list ap) 146858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 146958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *hp = NULL; 147058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *ypcurrent; 147158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int ypcurrentlen, r; 147258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char name[INET6_ADDRSTRLEN]; /* XXX enough? */ 147358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui const unsigned char *uaddr; 147458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int af; 147558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui const char *map; 147658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr *info = rv; 147758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 147858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(rv != NULL); 147958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 148058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui uaddr = va_arg(ap, unsigned char *); 148158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* NOSTRICT skip len */(void)va_arg(ap, int); 148258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui af = va_arg(ap, int); 148358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 148458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!__ypdomain) { 148558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (_yp_check(&__ypdomain) == 0) 148658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_UNAVAIL; 148758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 148858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* 148958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * XXX unfortunately, we cannot support IPv6 extended scoped address 149058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * notation here. gethostbyaddr() is not scope-aware. too bad. 149158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui */ 149258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (inet_ntop(af, uaddr, name, (socklen_t)sizeof(name)) == NULL) 149358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_UNAVAIL; 149458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (af) { 149558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui case AF_INET: 149658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map = "hosts.byaddr"; 149758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 149858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui default: 149958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map = "ipnodes.byaddr"; 150058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 150158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 150258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ypcurrent = NULL; 150358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui r = yp_match(__ypdomain, map, name, 150458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (int)strlen(name), &ypcurrent, &ypcurrentlen); 150558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (r == 0) 150658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = _yp_hostent(ypcurrent, af, info); 150758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui else 150858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = NULL; 150958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(ypcurrent); 151058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hp == NULL) { 151158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = HOST_NOT_FOUND; 151258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_NOTFOUND; 151358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 151458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_SUCCESS; 151558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 151658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 151758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/*ARGSUSED*/ 151858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiint 151958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui_yp_gethtbyname(void *rv, void *cb_data, va_list ap) 152058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 152158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *hp; 152258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui char *ypcurrent; 152358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int ypcurrentlen, r; 152458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui const char *name; 152558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui int af; 152658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui const char *map; 152758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct getnamaddr *info = rv; 152858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 152958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui _DIAGASSERT(rv != NULL); 153058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 153158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui name = va_arg(ap, char *); 153258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui /* NOSTRICT skip string len */(void)va_arg(ap, int); 153358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui af = va_arg(ap, int); 153458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 153558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!__ypdomain) { 153658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (_yp_check(&__ypdomain) == 0) 153758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_UNAVAIL; 153858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 153958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui switch (af) { 154058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui case AF_INET: 154158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map = "hosts.byname"; 154258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 154358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui default: 154458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui map = "ipnodes.byname"; 154558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui break; 154658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 154758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui ypcurrent = NULL; 154858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui r = yp_match(__ypdomain, map, name, 154958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui (int)strlen(name), &ypcurrent, &ypcurrentlen); 155058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (r == 0) 155158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = _yp_hostent(ypcurrent, af, info); 155258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui else 155358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = NULL; 155458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui free(ypcurrent); 155558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (hp == NULL) { 155658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui *info->he = HOST_NOT_FOUND; 155758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NS_NOTFOUND; 155858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 15591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return NS_SUCCESS; 15601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 156158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui#endif 156258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 156358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui/* 156458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui * Non-reentrant versions. 156558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui */ 156658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 156758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 156858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyname(const char *name) 156958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 157058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *result = NULL; 157158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_static rs = __res_get_static(); /* Use res_static to provide thread-safety. */ 157258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 157358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui gethostbyname_r(name, &rs->host, rs->hostbuf, sizeof(rs->hostbuf), &result, &h_errno); 157458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return result; 157558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 157658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 157758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 157858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyname2(const char *name, int af) 157958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 158058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *result = NULL; 158158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_static rs = __res_get_static(); /* Use res_static to provide thread-safety. */ 158258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 158358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui gethostbyname2_r(name, af, &rs->host, rs->hostbuf, sizeof(rs->hostbuf), &result, &h_errno); 158458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return result; 158558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 158658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 158750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// android_gethostby*fornet can be called in two different contexts. 158850178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// - In the proxy client context (proxy != NULL), |netid| is |app_netid|. 158950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// - In the proxy listener context (proxy == NULL), |netid| is |dns_netid|. 159050178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// The netcontext is constructed before checking which context we are in. 159150178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// Therefore, we have to populate both fields, and rely on the downstream code to check whether 159250178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz// |proxy == NULL|, and use that info to query the field that matches the caller's intent. 159350178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzstatic struct android_net_context make_context(unsigned netid, unsigned mark) { 159450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz struct android_net_context netcontext = NETCONTEXT_UNSET; 159550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz netcontext.app_netid = netid; 159650178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz netcontext.app_mark = mark; 159750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz netcontext.dns_netid = netid; 159850178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz netcontext.dns_mark = mark; 159950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return netcontext; 160050178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz} 160150178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz 160258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 160358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiandroid_gethostbynamefornet(const char *name, int af, unsigned netid, unsigned mark) 160458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 1605dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz const struct android_net_context netcontext = make_context(netid, mark); 1606dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz return android_gethostbynamefornetcontext(name, af, &netcontext); 1607dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz} 1608dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz 1609dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartzstruct hostent * 1610dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartzandroid_gethostbynamefornetcontext(const char *name, int af, 1611dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz const struct android_net_context *netcontext) 1612dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz{ 161358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui struct hostent *hp; 161458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_state res = __res_get_state(); 161558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (res == NULL) 161658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 161758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_static rs = __res_get_static(); /* Use res_static to provide thread-safety. */ 161858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui hp = gethostbyname_internal(name, af, res, &rs->host, rs->hostbuf, sizeof(rs->hostbuf), 1619dd878fe129bb128fb28577c6ccc3fbf04addf898Ben Schwartz &h_errno, netcontext); 162058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui __res_put_state(res); 162158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return hp; 162258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 162358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 162458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 162558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostbyaddr(const void *addr, socklen_t len, int af) 162658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 162750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return android_gethostbyaddrfornetcontext_proxy(addr, len, af, &NETCONTEXT_UNSET); 162858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 162958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 163058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 163158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuiandroid_gethostbyaddrfornet(const void *addr, socklen_t len, int af, unsigned netid, unsigned mark) 163258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 163350178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context netcontext = make_context(netid, mark); 163450178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return android_gethostbyaddrfornetcontext(addr, len, af, &netcontext); 163550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz} 163650178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz 163750178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzstruct hostent * 163850178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzandroid_gethostbyaddrfornetcontext(const void *addr, socklen_t len, int af, 163950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context *netcontext) 164050178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz{ 164150178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return android_gethostbyaddrfornetcontext_proxy(addr, len, af, netcontext); 164258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 164358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 164458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui__LIBC_HIDDEN__ struct hostent* 164550178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartzandroid_gethostbyaddrfornetcontext_proxy(const void* addr, socklen_t len, int af, 164650178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz const struct android_net_context *netcontext) 164758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 164858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_static rs = __res_get_static(); /* Use res_static to provide thread-safety. */ 164950178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz return android_gethostbyaddrfornetcontext_proxy_internal(addr, len, af, &rs->host, rs->hostbuf, 165050178056f7930a33cb1d0a45c76b3dfbe17c5506Ben Schwartz sizeof(rs->hostbuf), &h_errno, netcontext); 165158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 165258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui 165358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuistruct hostent * 165458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cuigethostent(void) 165558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui{ 165658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui res_static rs = __res_get_static(); 165758d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!rs->hostf) { 165858d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui sethostent_r(&rs->hostf); 165958d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui if (!rs->hostf) { 166058d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui h_errno = NETDB_INTERNAL; 166158d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return NULL; 166258d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 166358d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui } 166458d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui memset(&rs->host, 0, sizeof(rs->host)); 166558d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui return netbsd_gethostent_r(rs->hostf, &rs->host, rs->hostbuf, sizeof(rs->hostbuf), &h_errno); 166658d33a51f336d6823ef1ec915949a5884699ff5fYabin Cui} 1667