1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/other-licenses/android/res_init.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,915 @@
1.4 +/* $NetBSD: res_init.c,v 1.8 2006/03/19 03:10:08 christos Exp $ */
1.5 +
1.6 +/*
1.7 + * Copyright (c) 1985, 1989, 1993
1.8 + * The Regents of the University of California. All rights reserved.
1.9 + *
1.10 + * Redistribution and use in source and binary forms, with or without
1.11 + * modification, are permitted provided that the following conditions
1.12 + * are met:
1.13 + * 1. Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + * 2. Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in the
1.17 + * documentation and/or other materials provided with the distribution.
1.18 + * 3. All advertising materials mentioning features or use of this software
1.19 + * must display the following acknowledgement:
1.20 + * This product includes software developed by the University of
1.21 + * California, Berkeley and its contributors.
1.22 + * 4. Neither the name of the University nor the names of its contributors
1.23 + * may be used to endorse or promote products derived from this software
1.24 + * without specific prior written permission.
1.25 + *
1.26 + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.27 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.28 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.29 + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.30 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.31 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.32 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.33 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.34 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.35 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.36 + * SUCH DAMAGE.
1.37 + */
1.38 +
1.39 +/*
1.40 + * Portions Copyright (c) 1993 by Digital Equipment Corporation.
1.41 + *
1.42 + * Permission to use, copy, modify, and distribute this software for any
1.43 + * purpose with or without fee is hereby granted, provided that the above
1.44 + * copyright notice and this permission notice appear in all copies, and that
1.45 + * the name of Digital Equipment Corporation not be used in advertising or
1.46 + * publicity pertaining to distribution of the document or software without
1.47 + * specific, written prior permission.
1.48 + *
1.49 + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
1.50 + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
1.51 + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
1.52 + * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
1.53 + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
1.54 + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
1.55 + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
1.56 + * SOFTWARE.
1.57 + */
1.58 +
1.59 +/*
1.60 + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
1.61 + * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
1.62 + *
1.63 + * Permission to use, copy, modify, and distribute this software for any
1.64 + * purpose with or without fee is hereby granted, provided that the above
1.65 + * copyright notice and this permission notice appear in all copies.
1.66 + *
1.67 + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
1.68 + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.69 + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
1.70 + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1.71 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1.72 + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
1.73 + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.74 + */
1.75 +
1.76 +/*
1.77 + * This version of this file is derived from Android 2.3 "Gingerbread",
1.78 + * which contains uncredited changes by Android/Google developers. It has
1.79 + * been modified in 2011 for use in the Android build of Mozilla Firefox by
1.80 + * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
1.81 + * and Steve Workman <sjhworkman@gmail.com>).
1.82 + * These changes are offered under the same license as the original NetBSD
1.83 + * file, whose copyright and license are unchanged above.
1.84 + */
1.85 +
1.86 +#define ANDROID_CHANGES 1
1.87 +#define MOZILLE_NECKO_EXCLUDE_CODE 1
1.88 +
1.89 +#include <sys/cdefs.h>
1.90 +#if defined(LIBC_SCCS) && !defined(lint)
1.91 +#ifdef notdef
1.92 +static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
1.93 +static const char rcsid[] = "Id: res_init.c,v 1.9.2.5.4.2 2004/03/16 12:34:18 marka Exp";
1.94 +#else
1.95 +__RCSID("$NetBSD: res_init.c,v 1.8 2006/03/19 03:10:08 christos Exp $");
1.96 +#endif
1.97 +#endif /* LIBC_SCCS and not lint */
1.98 +
1.99 +
1.100 +
1.101 +#include <sys/types.h>
1.102 +#include <sys/param.h>
1.103 +#include <sys/socket.h>
1.104 +#include <sys/time.h>
1.105 +
1.106 +#include <netinet/in.h>
1.107 +#include <arpa/inet.h>
1.108 +#include "arpa_nameser.h"
1.109 +
1.110 +#include <ctype.h>
1.111 +#include <stdio.h>
1.112 +#include <stdlib.h>
1.113 +#include <string.h>
1.114 +#include <unistd.h>
1.115 +#include <netdb.h>
1.116 +
1.117 +#ifdef ANDROID_CHANGES
1.118 +#include <sys/system_properties.h>
1.119 +#endif /* ANDROID_CHANGES */
1.120 +
1.121 +#ifndef MIN
1.122 +#define MIN(x,y) ((x)<(y)?(x):(y))
1.123 +#endif
1.124 +
1.125 +/* ensure that sockaddr_in6 and IN6ADDR_ANY_INIT are declared / defined */
1.126 +#ifdef ANDROID_CHANGES
1.127 +#include "resolv_private.h"
1.128 +#define MAX_DNS_PROPERTIES 8
1.129 +#define DNS_PROP_NAME_PREFIX "net.dns"
1.130 +#define DNS_CHANGE_PROP_NAME "net.dnschange"
1.131 +#define DNS_SEARCH_PROP_NAME "net.dns.search"
1.132 +const prop_info *dns_change_prop;
1.133 +int dns_last_change_counter;
1.134 +static int _get_dns_change_count();
1.135 +#else
1.136 +#include <resolv.h>
1.137 +#endif
1.138 +
1.139 +#include "res_private.h"
1.140 +
1.141 +/* Options. Should all be left alone. */
1.142 +#ifndef DEBUG
1.143 +#define DEBUG
1.144 +#endif
1.145 +
1.146 +static void res_setoptions __P((res_state, const char *, const char *));
1.147 +
1.148 +static const char sort_mask[] = "/&";
1.149 +#define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
1.150 +static u_int32_t net_mask __P((struct in_addr));
1.151 +
1.152 +#if !defined(isascii) /* XXX - could be a function */
1.153 +# define isascii(c) (!(c & 0200))
1.154 +#endif
1.155 +
1.156 +/*
1.157 + * Resolver state default settings.
1.158 + */
1.159 +
1.160 +/*
1.161 + * Set up default settings. If the configuration file exist, the values
1.162 + * there will have precedence. Otherwise, the server address is set to
1.163 + * INADDR_ANY and the default domain name comes from the gethostname().
1.164 + *
1.165 + * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
1.166 + * rather than INADDR_ANY ("0.0.0.0") as the default name server address
1.167 + * since it was noted that INADDR_ANY actually meant ``the first interface
1.168 + * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
1.169 + * it had to be "up" in order for you to reach your own name server. It
1.170 + * was later decided that since the recommended practice is to always
1.171 + * install local static routes through 127.0.0.1 for all your network
1.172 + * interfaces, that we could solve this problem without a code change.
1.173 + *
1.174 + * The configuration file should always be used, since it is the only way
1.175 + * to specify a default domain. If you are running a server on your local
1.176 + * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
1.177 + * in the configuration file.
1.178 + *
1.179 + * Return 0 if completes successfully, -1 on error
1.180 + */
1.181 +int
1.182 +res_ninit(res_state statp) {
1.183 + extern int __res_vinit(res_state, int);
1.184 +
1.185 + return (__res_vinit(statp, 0));
1.186 +}
1.187 +
1.188 +#ifdef ANDROID_CHANGES
1.189 +int load_domain_search_list(res_state statp) {
1.190 + char propvalue[PROP_VALUE_MAX];
1.191 + register char *cp, **pp;
1.192 +
1.193 + if(__system_property_get(DNS_SEARCH_PROP_NAME, propvalue) >= 1) {
1.194 + strlcpy(statp->defdname, propvalue, sizeof(statp->defdname));
1.195 + if ((cp = strchr(statp->defdname, '\n')) != NULL)
1.196 + *cp = '\0';
1.197 + cp = statp->defdname;
1.198 + pp = statp->dnsrch;
1.199 + while ( pp < statp->dnsrch + MAXDNSRCH ) {
1.200 + while (*cp == ' ' || *cp == '\t') /* skip leading white space */
1.201 + cp++;
1.202 + if (*cp == '\0') /* stop if nothing more */
1.203 + break;
1.204 + *pp++ = cp; /* record this search domain */
1.205 + while (*cp) { /* zero-terminate it */
1.206 + if (*cp == ' ' || *cp == '\t') {
1.207 + *cp++ = '\0';
1.208 + break;
1.209 + }
1.210 + cp++;
1.211 + }
1.212 + }
1.213 + *pp = NULL; /* statp->dnsrch has MAXDNSRCH+1 items */
1.214 + if (pp > statp->dnsrch)
1.215 + return 1;
1.216 + }
1.217 + statp->defdname[0] = '\0'; /* no default domain name on Android */
1.218 + statp->dnsrch[0] = NULL;
1.219 + return 0;
1.220 +}
1.221 +#endif
1.222 +
1.223 +/* This function has to be reachable by res_data.c but not publicly. */
1.224 +int
1.225 +__res_vinit(res_state statp, int preinit) {
1.226 + register FILE *fp;
1.227 + register char *cp, **pp;
1.228 + register int n;
1.229 + char buf[BUFSIZ];
1.230 + int nserv = 0; /* number of nameserver records read from file */
1.231 + int haveenv = 0;
1.232 + int havesearch = 0;
1.233 + int nsort = 0;
1.234 + char *net;
1.235 + int dots;
1.236 + union res_sockaddr_union u[2];
1.237 +#ifdef ANDROID_CHANGES
1.238 + pid_t mypid = getpid();
1.239 + int use_proc_props = 0;
1.240 + int found_prop;
1.241 + char dnsProperty[PROP_VALUE_MAX];
1.242 +#endif
1.243 +
1.244 + if (!preinit) {
1.245 + statp->retrans = RES_TIMEOUT;
1.246 + statp->retry = RES_DFLRETRY;
1.247 + statp->options = RES_DEFAULT;
1.248 + statp->id = res_randomid();
1.249 + }
1.250 +
1.251 + if ((statp->options & RES_INIT) != 0U)
1.252 + res_ndestroy(statp);
1.253 +
1.254 + memset(u, 0, sizeof(u));
1.255 +#ifdef USELOOPBACK
1.256 + u[nserv].sin.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
1.257 +#else
1.258 + u[nserv].sin.sin_addr.s_addr = INADDR_ANY;
1.259 +#endif
1.260 + u[nserv].sin.sin_family = AF_INET;
1.261 + u[nserv].sin.sin_port = htons(NAMESERVER_PORT);
1.262 +#ifdef HAVE_SA_LEN
1.263 + u[nserv].sin.sin_len = sizeof(struct sockaddr_in);
1.264 +#endif
1.265 + nserv++;
1.266 +#ifdef HAS_INET6_STRUCTS
1.267 +#ifdef USELOOPBACK
1.268 + u[nserv].sin6.sin6_addr = in6addr_loopback;
1.269 +#else
1.270 + u[nserv].sin6.sin6_addr = in6addr_any;
1.271 +#endif
1.272 + u[nserv].sin6.sin6_family = AF_INET6;
1.273 + u[nserv].sin6.sin6_port = htons(NAMESERVER_PORT);
1.274 +#ifdef HAVE_SA_LEN
1.275 + u[nserv].sin6.sin6_len = sizeof(struct sockaddr_in6);
1.276 +#endif
1.277 + nserv++;
1.278 +#endif
1.279 + statp->nscount = 0;
1.280 + statp->ndots = 1;
1.281 + statp->pfcode = 0;
1.282 + statp->_vcsock = -1;
1.283 + statp->_flags = 0;
1.284 + statp->qhook = NULL;
1.285 + statp->rhook = NULL;
1.286 + statp->_u._ext.nscount = 0;
1.287 + statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext));
1.288 + if (statp->_u._ext.ext != NULL) {
1.289 + memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext));
1.290 + statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
1.291 + strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
1.292 + strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
1.293 + }
1.294 + statp->nsort = 0;
1.295 + res_setservers(statp, u, nserv);
1.296 +
1.297 +#if 0 /* IGNORE THE ENVIRONMENT */
1.298 + /* Allow user to override the local domain definition */
1.299 + if ((cp = getenv("LOCALDOMAIN")) != NULL) {
1.300 + (void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
1.301 + statp->defdname[sizeof(statp->defdname) - 1] = '\0';
1.302 + haveenv++;
1.303 +
1.304 + /*
1.305 + * Set search list to be blank-separated strings
1.306 + * from rest of env value. Permits users of LOCALDOMAIN
1.307 + * to still have a search list, and anyone to set the
1.308 + * one that they want to use as an individual (even more
1.309 + * important now that the rfc1535 stuff restricts searches)
1.310 + */
1.311 + cp = statp->defdname;
1.312 + pp = statp->dnsrch;
1.313 + *pp++ = cp;
1.314 + for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
1.315 + if (*cp == '\n') /* silly backwards compat */
1.316 + break;
1.317 + else if (*cp == ' ' || *cp == '\t') {
1.318 + *cp = 0;
1.319 + n = 1;
1.320 + } else if (n) {
1.321 + *pp++ = cp;
1.322 + n = 0;
1.323 + havesearch = 1;
1.324 + }
1.325 + }
1.326 + /* null terminate last domain if there are excess */
1.327 + while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
1.328 + cp++;
1.329 + *cp = '\0';
1.330 + *pp++ = 0;
1.331 + }
1.332 + if (nserv > 0)
1.333 + statp->nscount = nserv;
1.334 +#endif
1.335 +#ifdef ANDROID_CHANGES /* READ FROM SYSTEM PROPERTIES */
1.336 + dns_last_change_counter = _get_dns_change_count();
1.337 +
1.338 + nserv = 0;
1.339 + for(n = 1; n <= MAX_DNS_PROPERTIES && nserv < MAXNS; n++) {
1.340 + char propname[PROP_NAME_MAX];
1.341 + char propvalue[PROP_VALUE_MAX];
1.342 +
1.343 + struct addrinfo hints, *ai;
1.344 + char sbuf[NI_MAXSERV];
1.345 + const size_t minsiz = sizeof(statp->_u._ext.ext->nsaddrs[0]);
1.346 +
1.347 + /*
1.348 + * Check first for process-specific properties, and if those don't
1.349 + * exist, try the generic properties.
1.350 + */
1.351 + found_prop = 0;
1.352 + if (n == 1 || use_proc_props) {
1.353 + snprintf(propname, sizeof(propname), "%s%d.%d", DNS_PROP_NAME_PREFIX, n, mypid);
1.354 + if(__system_property_get(propname, propvalue) < 1) {
1.355 + if (use_proc_props) {
1.356 + break;
1.357 + }
1.358 + } else {
1.359 + found_prop = 1;
1.360 + use_proc_props = 1;
1.361 + }
1.362 + }
1.363 + if (!found_prop) {
1.364 + snprintf(propname, sizeof(propname), "%s%d", DNS_PROP_NAME_PREFIX, n);
1.365 + if(__system_property_get(propname, propvalue) < 1) {
1.366 + break;
1.367 + }
1.368 + }
1.369 +
1.370 + cp = propvalue;
1.371 +
1.372 + while (*cp == ' ' || *cp == '\t')
1.373 + cp++;
1.374 + cp[strcspn(cp, ";# \t\n")] = '\0';
1.375 + if ((*cp != '\0') && (*cp != '\n')) {
1.376 + memset(&hints, 0, sizeof(hints));
1.377 + hints.ai_family = PF_UNSPEC;
1.378 + hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1.379 + hints.ai_flags = AI_NUMERICHOST;
1.380 + sprintf(sbuf, "%u", NAMESERVER_PORT);
1.381 + if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 &&
1.382 + (size_t)ai->ai_addrlen <= minsiz) {
1.383 + if (statp->_u._ext.ext != NULL) {
1.384 + memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
1.385 + ai->ai_addr, ai->ai_addrlen);
1.386 + }
1.387 + if ((size_t)ai->ai_addrlen <=
1.388 + sizeof(statp->nsaddr_list[nserv])) {
1.389 + memcpy(&statp->nsaddr_list[nserv],
1.390 + ai->ai_addr, ai->ai_addrlen);
1.391 + } else {
1.392 + statp->nsaddr_list[nserv].sin_family = 0;
1.393 + }
1.394 + freeaddrinfo(ai);
1.395 + nserv++;
1.396 + }
1.397 + }
1.398 + }
1.399 +
1.400 + /* Add the domain search list */
1.401 + havesearch = load_domain_search_list(statp);
1.402 +#else /* !ANDROID_CHANGES - IGNORE resolv.conf in Android */
1.403 +#define MATCH(line, name) \
1.404 + (!strncmp(line, name, sizeof(name) - 1) && \
1.405 + (line[sizeof(name) - 1] == ' ' || \
1.406 + line[sizeof(name) - 1] == '\t'))
1.407 +
1.408 + nserv = 0;
1.409 + if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
1.410 + /* read the config file */
1.411 + while (fgets(buf, sizeof(buf), fp) != NULL) {
1.412 + /* skip comments */
1.413 + if (*buf == ';' || *buf == '#')
1.414 + continue;
1.415 + /* read default domain name */
1.416 + if (MATCH(buf, "domain")) {
1.417 + if (haveenv) /* skip if have from environ */
1.418 + continue;
1.419 + cp = buf + sizeof("domain") - 1;
1.420 + while (*cp == ' ' || *cp == '\t')
1.421 + cp++;
1.422 + if ((*cp == '\0') || (*cp == '\n'))
1.423 + continue;
1.424 + strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
1.425 + statp->defdname[sizeof(statp->defdname) - 1] = '\0';
1.426 + if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
1.427 + *cp = '\0';
1.428 + havesearch = 0;
1.429 + continue;
1.430 + }
1.431 + /* set search list */
1.432 + if (MATCH(buf, "search")) {
1.433 + if (haveenv) /* skip if have from environ */
1.434 + continue;
1.435 + cp = buf + sizeof("search") - 1;
1.436 + while (*cp == ' ' || *cp == '\t')
1.437 + cp++;
1.438 + if ((*cp == '\0') || (*cp == '\n'))
1.439 + continue;
1.440 + strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
1.441 + statp->defdname[sizeof(statp->defdname) - 1] = '\0';
1.442 + if ((cp = strchr(statp->defdname, '\n')) != NULL)
1.443 + *cp = '\0';
1.444 + /*
1.445 + * Set search list to be blank-separated strings
1.446 + * on rest of line.
1.447 + */
1.448 + cp = statp->defdname;
1.449 + pp = statp->dnsrch;
1.450 + *pp++ = cp;
1.451 + for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
1.452 + if (*cp == ' ' || *cp == '\t') {
1.453 + *cp = 0;
1.454 + n = 1;
1.455 + } else if (n) {
1.456 + *pp++ = cp;
1.457 + n = 0;
1.458 + }
1.459 + }
1.460 + /* null terminate last domain if there are excess */
1.461 + while (*cp != '\0' && *cp != ' ' && *cp != '\t')
1.462 + cp++;
1.463 + *cp = '\0';
1.464 + *pp++ = 0;
1.465 + havesearch = 1;
1.466 + continue;
1.467 + }
1.468 + /* read nameservers to query */
1.469 + if (MATCH(buf, "nameserver") && nserv < MAXNS) {
1.470 + struct addrinfo hints, *ai;
1.471 + char sbuf[NI_MAXSERV];
1.472 + const size_t minsiz =
1.473 + sizeof(statp->_u._ext.ext->nsaddrs[0]);
1.474 +
1.475 + cp = buf + sizeof("nameserver") - 1;
1.476 + while (*cp == ' ' || *cp == '\t')
1.477 + cp++;
1.478 + cp[strcspn(cp, ";# \t\n")] = '\0';
1.479 + if ((*cp != '\0') && (*cp != '\n')) {
1.480 + memset(&hints, 0, sizeof(hints));
1.481 + hints.ai_family = PF_UNSPEC;
1.482 + hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1.483 + hints.ai_flags = AI_NUMERICHOST;
1.484 + sprintf(sbuf, "%u", NAMESERVER_PORT);
1.485 + if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 &&
1.486 + ai->ai_addrlen <= minsiz) {
1.487 + if (statp->_u._ext.ext != NULL) {
1.488 + memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
1.489 + ai->ai_addr, ai->ai_addrlen);
1.490 + }
1.491 + if (ai->ai_addrlen <=
1.492 + sizeof(statp->nsaddr_list[nserv])) {
1.493 + memcpy(&statp->nsaddr_list[nserv],
1.494 + ai->ai_addr, ai->ai_addrlen);
1.495 + } else
1.496 + statp->nsaddr_list[nserv].sin_family = 0;
1.497 + freeaddrinfo(ai);
1.498 + nserv++;
1.499 + }
1.500 + }
1.501 + continue;
1.502 + }
1.503 + if (MATCH(buf, "sortlist")) {
1.504 + struct in_addr a;
1.505 +
1.506 + cp = buf + sizeof("sortlist") - 1;
1.507 + while (nsort < MAXRESOLVSORT) {
1.508 + while (*cp == ' ' || *cp == '\t')
1.509 + cp++;
1.510 + if (*cp == '\0' || *cp == '\n' || *cp == ';')
1.511 + break;
1.512 + net = cp;
1.513 + while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
1.514 + isascii(*cp) && !isspace((unsigned char)*cp))
1.515 + cp++;
1.516 + n = *cp;
1.517 + *cp = 0;
1.518 + if (inet_aton(net, &a)) {
1.519 + statp->sort_list[nsort].addr = a;
1.520 + if (ISSORTMASK(n)) {
1.521 + *cp++ = n;
1.522 + net = cp;
1.523 + while (*cp && *cp != ';' &&
1.524 + isascii(*cp) &&
1.525 + !isspace((unsigned char)*cp))
1.526 + cp++;
1.527 + n = *cp;
1.528 + *cp = 0;
1.529 + if (inet_aton(net, &a)) {
1.530 + statp->sort_list[nsort].mask = a.s_addr;
1.531 + } else {
1.532 + statp->sort_list[nsort].mask =
1.533 + net_mask(statp->sort_list[nsort].addr);
1.534 + }
1.535 + } else {
1.536 + statp->sort_list[nsort].mask =
1.537 + net_mask(statp->sort_list[nsort].addr);
1.538 + }
1.539 + nsort++;
1.540 + }
1.541 + *cp = n;
1.542 + }
1.543 + continue;
1.544 + }
1.545 + if (MATCH(buf, "options")) {
1.546 + res_setoptions(statp, buf + sizeof("options") - 1, "conf");
1.547 + continue;
1.548 + }
1.549 + }
1.550 + if (nserv > 0)
1.551 + statp->nscount = nserv;
1.552 + statp->nsort = nsort;
1.553 + (void) fclose(fp);
1.554 + }
1.555 +#endif /* !ANDROID_CHANGES */
1.556 +/*
1.557 + * Last chance to get a nameserver. This should not normally
1.558 + * be necessary
1.559 + */
1.560 +#ifdef NO_RESOLV_CONF
1.561 + if(nserv == 0)
1.562 + nserv = get_nameservers(statp);
1.563 +#endif
1.564 +
1.565 + if (statp->defdname[0] == 0 &&
1.566 + gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
1.567 + (cp = strchr(buf, '.')) != NULL)
1.568 + strcpy(statp->defdname, cp + 1);
1.569 +
1.570 + /* find components of local domain that might be searched */
1.571 + if (havesearch == 0) {
1.572 + pp = statp->dnsrch;
1.573 + *pp++ = statp->defdname;
1.574 + *pp = NULL;
1.575 +
1.576 + dots = 0;
1.577 + for (cp = statp->defdname; *cp; cp++)
1.578 + dots += (*cp == '.');
1.579 +
1.580 + cp = statp->defdname;
1.581 + while (pp < statp->dnsrch + MAXDFLSRCH) {
1.582 + if (dots < LOCALDOMAINPARTS)
1.583 + break;
1.584 + cp = strchr(cp, '.') + 1; /* we know there is one */
1.585 + *pp++ = cp;
1.586 + dots--;
1.587 + }
1.588 + *pp = NULL;
1.589 +#ifdef DEBUG
1.590 + if (statp->options & RES_DEBUG) {
1.591 + printf(";; res_init()... default dnsrch list:\n");
1.592 + for (pp = statp->dnsrch; *pp; pp++)
1.593 + printf(";;\t%s\n", *pp);
1.594 + printf(";;\t..END..\n");
1.595 + }
1.596 +#endif
1.597 + }
1.598 +
1.599 + if ((cp = getenv("RES_OPTIONS")) != NULL)
1.600 + res_setoptions(statp, cp, "env");
1.601 + if (nserv > 0) {
1.602 + statp->nscount = nserv;
1.603 + statp->options |= RES_INIT;
1.604 + }
1.605 + return (0);
1.606 +}
1.607 +
1.608 +static void
1.609 +res_setoptions(res_state statp, const char *options, const char *source)
1.610 +{
1.611 + const char *cp = options;
1.612 + int i;
1.613 + struct __res_state_ext *ext = statp->_u._ext.ext;
1.614 +
1.615 +#ifdef DEBUG
1.616 + if (statp->options & RES_DEBUG)
1.617 + printf(";; res_setoptions(\"%s\", \"%s\")...\n",
1.618 + options, source);
1.619 +#endif
1.620 + while (*cp) {
1.621 + /* skip leading and inner runs of spaces */
1.622 + while (*cp == ' ' || *cp == '\t')
1.623 + cp++;
1.624 + /* search for and process individual options */
1.625 + if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
1.626 + i = atoi(cp + sizeof("ndots:") - 1);
1.627 + if (i <= RES_MAXNDOTS)
1.628 + statp->ndots = i;
1.629 + else
1.630 + statp->ndots = RES_MAXNDOTS;
1.631 +#ifdef DEBUG
1.632 + if (statp->options & RES_DEBUG)
1.633 + printf(";;\tndots=%d\n", statp->ndots);
1.634 +#endif
1.635 + } else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
1.636 + i = atoi(cp + sizeof("timeout:") - 1);
1.637 + if (i <= RES_MAXRETRANS)
1.638 + statp->retrans = i;
1.639 + else
1.640 + statp->retrans = RES_MAXRETRANS;
1.641 +#ifdef DEBUG
1.642 + if (statp->options & RES_DEBUG)
1.643 + printf(";;\ttimeout=%d\n", statp->retrans);
1.644 +#endif
1.645 + } else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
1.646 + i = atoi(cp + sizeof("attempts:") - 1);
1.647 + if (i <= RES_MAXRETRY)
1.648 + statp->retry = i;
1.649 + else
1.650 + statp->retry = RES_MAXRETRY;
1.651 +#ifdef DEBUG
1.652 + if (statp->options & RES_DEBUG)
1.653 + printf(";;\tattempts=%d\n", statp->retry);
1.654 +#endif
1.655 + } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
1.656 +#ifdef DEBUG
1.657 + if (!(statp->options & RES_DEBUG)) {
1.658 + printf(";; res_setoptions(\"%s\", \"%s\")..\n",
1.659 + options, source);
1.660 + statp->options |= RES_DEBUG;
1.661 + }
1.662 + printf(";;\tdebug\n");
1.663 +#endif
1.664 + } else if (!strncmp(cp, "no_tld_query",
1.665 + sizeof("no_tld_query") - 1) ||
1.666 + !strncmp(cp, "no-tld-query",
1.667 + sizeof("no-tld-query") - 1)) {
1.668 + statp->options |= RES_NOTLDQUERY;
1.669 + } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
1.670 + statp->options |= RES_USE_INET6;
1.671 + } else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
1.672 + statp->options |= RES_ROTATE;
1.673 + } else if (!strncmp(cp, "no-check-names",
1.674 + sizeof("no-check-names") - 1)) {
1.675 + statp->options |= RES_NOCHECKNAME;
1.676 + }
1.677 +#ifdef RES_USE_EDNS0
1.678 + else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
1.679 + statp->options |= RES_USE_EDNS0;
1.680 + }
1.681 +#endif
1.682 + else if (!strncmp(cp, "dname", sizeof("dname") - 1)) {
1.683 + statp->options |= RES_USE_DNAME;
1.684 + }
1.685 + else if (!strncmp(cp, "nibble:", sizeof("nibble:") - 1)) {
1.686 + if (ext == NULL)
1.687 + goto skip;
1.688 + cp += sizeof("nibble:") - 1;
1.689 + i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix) - 1);
1.690 + strncpy(ext->nsuffix, cp, (size_t)i);
1.691 + ext->nsuffix[i] = '\0';
1.692 + }
1.693 + else if (!strncmp(cp, "nibble2:", sizeof("nibble2:") - 1)) {
1.694 + if (ext == NULL)
1.695 + goto skip;
1.696 + cp += sizeof("nibble2:") - 1;
1.697 + i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix2) - 1);
1.698 + strncpy(ext->nsuffix2, cp, (size_t)i);
1.699 + ext->nsuffix2[i] = '\0';
1.700 + }
1.701 + else if (!strncmp(cp, "v6revmode:", sizeof("v6revmode:") - 1)) {
1.702 + cp += sizeof("v6revmode:") - 1;
1.703 + /* "nibble" and "bitstring" used to be valid */
1.704 + if (!strncmp(cp, "single", sizeof("single") - 1)) {
1.705 + statp->options |= RES_NO_NIBBLE2;
1.706 + } else if (!strncmp(cp, "both", sizeof("both") - 1)) {
1.707 + statp->options &=
1.708 + ~RES_NO_NIBBLE2;
1.709 + }
1.710 + }
1.711 + else {
1.712 + /* XXX - print a warning here? */
1.713 + }
1.714 + skip:
1.715 + /* skip to next run of spaces */
1.716 + while (*cp && *cp != ' ' && *cp != '\t')
1.717 + cp++;
1.718 + }
1.719 +}
1.720 +
1.721 +/* XXX - should really support CIDR which means explicit masks always. */
1.722 +static u_int32_t
1.723 +net_mask(in) /* XXX - should really use system's version of this */
1.724 + struct in_addr in;
1.725 +{
1.726 + register u_int32_t i = ntohl(in.s_addr);
1.727 +
1.728 + if (IN_CLASSA(i))
1.729 + return (htonl(IN_CLASSA_NET));
1.730 + else if (IN_CLASSB(i))
1.731 + return (htonl(IN_CLASSB_NET));
1.732 + return (htonl(IN_CLASSC_NET));
1.733 +}
1.734 +
1.735 +u_int
1.736 +res_randomid(void) {
1.737 + struct timeval now;
1.738 +
1.739 + gettimeofday(&now, NULL);
1.740 + return (0xffff & (now.tv_sec ^ now.tv_usec ^ getpid()));
1.741 +}
1.742 +
1.743 +/*
1.744 + * This routine is for closing the socket if a virtual circuit is used and
1.745 + * the program wants to close it. This provides support for endhostent()
1.746 + * which expects to close the socket.
1.747 + *
1.748 + * This routine is not expected to be user visible.
1.749 + */
1.750 +void
1.751 +res_nclose(res_state statp) {
1.752 + int ns;
1.753 +
1.754 + if (statp->_vcsock >= 0) {
1.755 + (void) close(statp->_vcsock);
1.756 + statp->_vcsock = -1;
1.757 + statp->_flags &= ~(RES_F_VC | RES_F_CONN);
1.758 + }
1.759 + for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
1.760 + if (statp->_u._ext.nssocks[ns] != -1) {
1.761 + (void) close(statp->_u._ext.nssocks[ns]);
1.762 + statp->_u._ext.nssocks[ns] = -1;
1.763 + }
1.764 + }
1.765 +}
1.766 +
1.767 +void
1.768 +res_ndestroy(res_state statp) {
1.769 + res_nclose(statp);
1.770 + if (statp->_u._ext.ext != NULL)
1.771 + free(statp->_u._ext.ext);
1.772 + statp->options &= ~RES_INIT;
1.773 + statp->_u._ext.ext = NULL;
1.774 +}
1.775 +
1.776 +const char *
1.777 +res_get_nibblesuffix(res_state statp) {
1.778 + if (statp->_u._ext.ext)
1.779 + return (statp->_u._ext.ext->nsuffix);
1.780 + return ("ip6.arpa");
1.781 +}
1.782 +
1.783 +const char *
1.784 +res_get_nibblesuffix2(res_state statp) {
1.785 + if (statp->_u._ext.ext)
1.786 + return (statp->_u._ext.ext->nsuffix2);
1.787 + return ("ip6.int");
1.788 +}
1.789 +
1.790 +void
1.791 +res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt) {
1.792 + int i, nserv;
1.793 + size_t size;
1.794 +
1.795 + /* close open servers */
1.796 + res_nclose(statp);
1.797 +
1.798 + /* cause rtt times to be forgotten */
1.799 + statp->_u._ext.nscount = 0;
1.800 +
1.801 + nserv = 0;
1.802 + for (i = 0; i < cnt && nserv < MAXNS; i++) {
1.803 + switch (set->sin.sin_family) {
1.804 + case AF_INET:
1.805 + size = sizeof(set->sin);
1.806 + if (statp->_u._ext.ext)
1.807 + memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
1.808 + &set->sin, size);
1.809 + if (size <= sizeof(statp->nsaddr_list[nserv]))
1.810 + memcpy(&statp->nsaddr_list[nserv],
1.811 + &set->sin, size);
1.812 +#ifdef notdef
1.813 + else
1.814 + statp->nsaddr_list[nserv].sin_family = 0;
1.815 +#endif
1.816 + nserv++;
1.817 + break;
1.818 +
1.819 +#ifdef HAS_INET6_STRUCTS
1.820 + case AF_INET6:
1.821 + size = sizeof(set->sin6);
1.822 + if (statp->_u._ext.ext)
1.823 + memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
1.824 + &set->sin6, size);
1.825 + if (size <= sizeof(statp->nsaddr_list[nserv]))
1.826 + memcpy(&statp->nsaddr_list[nserv],
1.827 + &set->sin6, size);
1.828 + else
1.829 + statp->nsaddr_list[nserv].sin_family = 0;
1.830 + nserv++;
1.831 + break;
1.832 +#endif
1.833 +
1.834 + default:
1.835 + break;
1.836 + }
1.837 + set++;
1.838 + }
1.839 + statp->nscount = nserv;
1.840 +
1.841 +}
1.842 +
1.843 +int
1.844 +res_getservers(res_state statp, union res_sockaddr_union *set, int cnt) {
1.845 + int i;
1.846 + size_t size;
1.847 + u_int16_t family;
1.848 +
1.849 + for (i = 0; i < statp->nscount && i < cnt; i++) {
1.850 + if (statp->_u._ext.ext)
1.851 + family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family;
1.852 + else
1.853 + family = statp->nsaddr_list[i].sin_family;
1.854 +
1.855 + switch (family) {
1.856 + case AF_INET:
1.857 + size = sizeof(set->sin);
1.858 + if (statp->_u._ext.ext)
1.859 + memcpy(&set->sin,
1.860 + &statp->_u._ext.ext->nsaddrs[i],
1.861 + size);
1.862 + else
1.863 + memcpy(&set->sin, &statp->nsaddr_list[i],
1.864 + size);
1.865 + break;
1.866 +
1.867 +#ifdef HAS_INET6_STRUCTS
1.868 + case AF_INET6:
1.869 + size = sizeof(set->sin6);
1.870 + if (statp->_u._ext.ext)
1.871 + memcpy(&set->sin6,
1.872 + &statp->_u._ext.ext->nsaddrs[i],
1.873 + size);
1.874 + else
1.875 + memcpy(&set->sin6, &statp->nsaddr_list[i],
1.876 + size);
1.877 + break;
1.878 +#endif
1.879 +
1.880 + default:
1.881 + set->sin.sin_family = 0;
1.882 + break;
1.883 + }
1.884 + set++;
1.885 + }
1.886 + return (statp->nscount);
1.887 +}
1.888 +
1.889 +#ifdef ANDROID_CHANGES
1.890 +static int _get_dns_change_count()
1.891 +{
1.892 + if (dns_change_prop == NULL) {
1.893 + dns_change_prop = __system_property_find(DNS_CHANGE_PROP_NAME);
1.894 + }
1.895 + if (dns_change_prop != NULL) {
1.896 + char propvalue[PROP_VALUE_MAX];
1.897 + if (__system_property_read(dns_change_prop, NULL, propvalue) >= 1) {
1.898 + return atoi(propvalue);
1.899 + }
1.900 + }
1.901 + return -1;
1.902 +}
1.903 +
1.904 +int res_get_dns_changed()
1.905 +{
1.906 + int change_count;
1.907 +
1.908 + change_count = _get_dns_change_count();
1.909 + if (change_count != dns_last_change_counter) {
1.910 + if (change_count != -1) {
1.911 + dns_last_change_counter = change_count;
1.912 + }
1.913 + return 1;
1.914 + } else {
1.915 + return 0;
1.916 + }
1.917 +}
1.918 +#endif /* ANDROID_CHANGES */
