diff options
Diffstat (limited to 'libc/netbsd/resolv/res_init.c')
| -rw-r--r-- | libc/netbsd/resolv/res_init.c | 863 |
1 files changed, 0 insertions, 863 deletions
diff --git a/libc/netbsd/resolv/res_init.c b/libc/netbsd/resolv/res_init.c deleted file mode 100644 index fc0272c..0000000 --- a/libc/netbsd/resolv/res_init.c +++ /dev/null @@ -1,863 +0,0 @@ -/* $NetBSD: res_init.c,v 1.8 2006/03/19 03:10:08 christos Exp $ */ - -/* - * Copyright (c) 1985, 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Portions Copyright (c) 1993 by Digital Equipment Corporation. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies, and that - * the name of Digital Equipment Corporation not be used in advertising or - * publicity pertaining to distribution of the document or software without - * specific, written prior permission. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL - * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT - * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -/* - * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") - * Portions Copyright (c) 1996-1999 by Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT - * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#include <sys/cdefs.h> -#if defined(LIBC_SCCS) && !defined(lint) -#ifdef notdef -static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93"; -static const char rcsid[] = "Id: res_init.c,v 1.9.2.5.4.2 2004/03/16 12:34:18 marka Exp"; -#else -__RCSID("$NetBSD: res_init.c,v 1.8 2006/03/19 03:10:08 christos Exp $"); -#endif -#endif /* LIBC_SCCS and not lint */ - - - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/time.h> - -#include <netinet/in.h> -#include <arpa/inet.h> -#include "arpa_nameser.h" - -#include <ctype.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <netdb.h> - -#ifdef ANDROID_CHANGES -#include <sys/system_properties.h> -#endif /* ANDROID_CHANGES */ - -#ifndef MIN -#define MIN(x,y) ((x)<(y)?(x):(y)) -#endif - -/* ensure that sockaddr_in6 and IN6ADDR_ANY_INIT are declared / defined */ -#ifdef ANDROID_CHANGES -#include "resolv_private.h" -#define MAX_DNS_PROPERTIES 8 -#define DNS_PROP_NAME_PREFIX "net.dns" -#define DNS_CHANGE_PROP_NAME "net.dnschange" -const prop_info *dns_change_prop; -int dns_last_change_counter; -static int _get_dns_change_count(); -#else -#include <resolv.h> -#endif - -#include "res_private.h" - -/* Options. Should all be left alone. */ -#ifndef DEBUG -#define DEBUG -#endif - -static void res_setoptions __P((res_state, const char *, const char *)); - -static const char sort_mask[] = "/&"; -#define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL) -static u_int32_t net_mask __P((struct in_addr)); - -#if !defined(isascii) /* XXX - could be a function */ -# define isascii(c) (!(c & 0200)) -#endif - -/* - * Resolver state default settings. - */ - -/* - * Set up default settings. If the configuration file exist, the values - * there will have precedence. Otherwise, the server address is set to - * INADDR_ANY and the default domain name comes from the gethostname(). - * - * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1 - * rather than INADDR_ANY ("0.0.0.0") as the default name server address - * since it was noted that INADDR_ANY actually meant ``the first interface - * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface, - * it had to be "up" in order for you to reach your own name server. It - * was later decided that since the recommended practice is to always - * install local static routes through 127.0.0.1 for all your network - * interfaces, that we could solve this problem without a code change. - * - * The configuration file should always be used, since it is the only way - * to specify a default domain. If you are running a server on your local - * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1" - * in the configuration file. - * - * Return 0 if completes successfully, -1 on error - */ -int -res_ninit(res_state statp) { - extern int __res_vinit(res_state, int); - - return (__res_vinit(statp, 0)); -} - -/* This function has to be reachable by res_data.c but not publicly. */ -int -__res_vinit(res_state statp, int preinit) { - register FILE *fp; - register char *cp, **pp; - register int n; - char buf[BUFSIZ]; - int nserv = 0; /* number of nameserver records read from file */ - int haveenv = 0; - int havesearch = 0; - int nsort = 0; - char *net; - int dots; - union res_sockaddr_union u[2]; -#ifdef ANDROID_CHANGES - pid_t mypid = getpid(); - int use_proc_props = 0; - int found_prop; - char dnsProperty[PROP_VALUE_MAX]; -#endif - - if (!preinit) { - statp->retrans = RES_TIMEOUT; - statp->retry = RES_DFLRETRY; - statp->options = RES_DEFAULT; - statp->id = res_randomid(); - } - - if ((statp->options & RES_INIT) != 0U) - res_ndestroy(statp); - - memset(u, 0, sizeof(u)); -#ifdef USELOOPBACK - u[nserv].sin.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1); -#else - u[nserv].sin.sin_addr.s_addr = INADDR_ANY; -#endif - u[nserv].sin.sin_family = AF_INET; - u[nserv].sin.sin_port = htons(NAMESERVER_PORT); -#ifdef HAVE_SA_LEN - u[nserv].sin.sin_len = sizeof(struct sockaddr_in); -#endif - nserv++; -#ifdef HAS_INET6_STRUCTS -#ifdef USELOOPBACK - u[nserv].sin6.sin6_addr = in6addr_loopback; -#else - u[nserv].sin6.sin6_addr = in6addr_any; -#endif - u[nserv].sin6.sin6_family = AF_INET6; - u[nserv].sin6.sin6_port = htons(NAMESERVER_PORT); -#ifdef HAVE_SA_LEN - u[nserv].sin6.sin6_len = sizeof(struct sockaddr_in6); -#endif - nserv++; -#endif - statp->nscount = 0; - statp->ndots = 1; - statp->pfcode = 0; - statp->_vcsock = -1; - statp->_flags = 0; - statp->qhook = NULL; - statp->rhook = NULL; - statp->_u._ext.nscount = 0; - statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext)); - if (statp->_u._ext.ext != NULL) { - memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext)); - statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr; - strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa"); - strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int"); - } - statp->nsort = 0; - res_setservers(statp, u, nserv); - -#if 0 /* IGNORE THE ENVIRONMENT */ - /* Allow user to override the local domain definition */ - if ((cp = getenv("LOCALDOMAIN")) != NULL) { - (void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1); - statp->defdname[sizeof(statp->defdname) - 1] = '\0'; - haveenv++; - - /* - * Set search list to be blank-separated strings - * from rest of env value. Permits users of LOCALDOMAIN - * to still have a search list, and anyone to set the - * one that they want to use as an individual (even more - * important now that the rfc1535 stuff restricts searches) - */ - cp = statp->defdname; - pp = statp->dnsrch; - *pp++ = cp; - for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) { - if (*cp == '\n') /* silly backwards compat */ - break; - else if (*cp == ' ' || *cp == '\t') { - *cp = 0; - n = 1; - } else if (n) { - *pp++ = cp; - n = 0; - havesearch = 1; - } - } - /* null terminate last domain if there are excess */ - while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n') - cp++; - *cp = '\0'; - *pp++ = 0; - } - if (nserv > 0) - statp->nscount = nserv; -#endif -#ifdef ANDROID_CHANGES /* READ FROM SYSTEM PROPERTIES */ - dns_last_change_counter = _get_dns_change_count(); - - nserv = 0; - for(n = 1; n <= MAX_DNS_PROPERTIES && nserv < MAXNS; n++) { - char propname[PROP_NAME_MAX]; - char propvalue[PROP_VALUE_MAX]; - - struct addrinfo hints, *ai; - char sbuf[NI_MAXSERV]; - const size_t minsiz = sizeof(statp->_u._ext.ext->nsaddrs[0]); - - /* - * Check first for process-specific properties, and if those don't - * exist, try the generic properties. - */ - found_prop = 0; - if (n == 1 || use_proc_props) { - snprintf(propname, sizeof(propname), "%s%d.%d", DNS_PROP_NAME_PREFIX, n, mypid); - if(__system_property_get(propname, propvalue) < 1) { - if (use_proc_props) { - break; - } - } else { - found_prop = 1; - use_proc_props = 1; - } - } - if (!found_prop) { - snprintf(propname, sizeof(propname), "%s%d", DNS_PROP_NAME_PREFIX, n); - if(__system_property_get(propname, propvalue) < 1) { - break; - } - } - - cp = propvalue; - - while (*cp == ' ' || *cp == '\t') - cp++; - cp[strcspn(cp, ";# \t\n")] = '\0'; - if ((*cp != '\0') && (*cp != '\n')) { - memset(&hints, 0, sizeof(hints)); - hints.ai_family = PF_UNSPEC; - hints.ai_socktype = SOCK_DGRAM; /*dummy*/ - hints.ai_flags = AI_NUMERICHOST; - sprintf(sbuf, "%u", NAMESERVER_PORT); - if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 && - (size_t)ai->ai_addrlen <= minsiz) { - if (statp->_u._ext.ext != NULL) { - memcpy(&statp->_u._ext.ext->nsaddrs[nserv], - ai->ai_addr, ai->ai_addrlen); - } - if ((size_t)ai->ai_addrlen <= - sizeof(statp->nsaddr_list[nserv])) { - memcpy(&statp->nsaddr_list[nserv], - ai->ai_addr, ai->ai_addrlen); - } else { - statp->nsaddr_list[nserv].sin_family = 0; - } - freeaddrinfo(ai); - nserv++; - } - } - } -#else /* IGNORE resolv.conf */ -#define MATCH(line, name) \ - (!strncmp(line, name, sizeof(name) - 1) && \ - (line[sizeof(name) - 1] == ' ' || \ - line[sizeof(name) - 1] == '\t')) - - nserv = 0; - if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) { - /* read the config file */ - while (fgets(buf, sizeof(buf), fp) != NULL) { - /* skip comments */ - if (*buf == ';' || *buf == '#') - continue; - /* read default domain name */ - if (MATCH(buf, "domain")) { - if (haveenv) /* skip if have from environ */ - continue; - cp = buf + sizeof("domain") - 1; - while (*cp == ' ' || *cp == '\t') - cp++; - if ((*cp == '\0') || (*cp == '\n')) - continue; - strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1); - statp->defdname[sizeof(statp->defdname) - 1] = '\0'; - if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL) - *cp = '\0'; - havesearch = 0; - continue; - } - /* set search list */ - if (MATCH(buf, "search")) { - if (haveenv) /* skip if have from environ */ - continue; - cp = buf + sizeof("search") - 1; - while (*cp == ' ' || *cp == '\t') - cp++; - if ((*cp == '\0') || (*cp == '\n')) - continue; - strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1); - statp->defdname[sizeof(statp->defdname) - 1] = '\0'; - if ((cp = strchr(statp->defdname, '\n')) != NULL) - *cp = '\0'; - /* - * Set search list to be blank-separated strings - * on rest of line. - */ - cp = statp->defdname; - pp = statp->dnsrch; - *pp++ = cp; - for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) { - if (*cp == ' ' || *cp == '\t') { - *cp = 0; - n = 1; - } else if (n) { - *pp++ = cp; - n = 0; - } - } - /* null terminate last domain if there are excess */ - while (*cp != '\0' && *cp != ' ' && *cp != '\t') - cp++; - *cp = '\0'; - *pp++ = 0; - havesearch = 1; - continue; - } - /* read nameservers to query */ - if (MATCH(buf, "nameserver") && nserv < MAXNS) { - struct addrinfo hints, *ai; - char sbuf[NI_MAXSERV]; - const size_t minsiz = - sizeof(statp->_u._ext.ext->nsaddrs[0]); - - cp = buf + sizeof("nameserver") - 1; - while (*cp == ' ' || *cp == '\t') - cp++; - cp[strcspn(cp, ";# \t\n")] = '\0'; - if ((*cp != '\0') && (*cp != '\n')) { - memset(&hints, 0, sizeof(hints)); - hints.ai_family = PF_UNSPEC; - hints.ai_socktype = SOCK_DGRAM; /*dummy*/ - hints.ai_flags = AI_NUMERICHOST; - sprintf(sbuf, "%u", NAMESERVER_PORT); - if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 && - ai->ai_addrlen <= minsiz) { - if (statp->_u._ext.ext != NULL) { - memcpy(&statp->_u._ext.ext->nsaddrs[nserv], - ai->ai_addr, ai->ai_addrlen); - } - if (ai->ai_addrlen <= - sizeof(statp->nsaddr_list[nserv])) { - memcpy(&statp->nsaddr_list[nserv], - ai->ai_addr, ai->ai_addrlen); - } else - statp->nsaddr_list[nserv].sin_family = 0; - freeaddrinfo(ai); - nserv++; - } - } - continue; - } - if (MATCH(buf, "sortlist")) { - struct in_addr a; - - cp = buf + sizeof("sortlist") - 1; - while (nsort < MAXRESOLVSORT) { - while (*cp == ' ' || *cp == '\t') - cp++; - if (*cp == '\0' || *cp == '\n' || *cp == ';') - break; - net = cp; - while (*cp && !ISSORTMASK(*cp) && *cp != ';' && - isascii(*cp) && !isspace((unsigned char)*cp)) - cp++; - n = *cp; - *cp = 0; - if (inet_aton(net, &a)) { - statp->sort_list[nsort].addr = a; - if (ISSORTMASK(n)) { - *cp++ = n; - net = cp; - while (*cp && *cp != ';' && - isascii(*cp) && - !isspace((unsigned char)*cp)) - cp++; - n = *cp; - *cp = 0; - if (inet_aton(net, &a)) { - statp->sort_list[nsort].mask = a.s_addr; - } else { - statp->sort_list[nsort].mask = - net_mask(statp->sort_list[nsort].addr); - } - } else { - statp->sort_list[nsort].mask = - net_mask(statp->sort_list[nsort].addr); - } - nsort++; - } - *cp = n; - } - continue; - } - if (MATCH(buf, "options")) { - res_setoptions(statp, buf + sizeof("options") - 1, "conf"); - continue; - } - } - if (nserv > 0) - statp->nscount = nserv; - statp->nsort = nsort; - (void) fclose(fp); - } -#endif /* ANDROID_CHANGES */ -/* - * Last chance to get a nameserver. This should not normally - * be necessary - */ -#ifdef NO_RESOLV_CONF - if(nserv == 0) - nserv = get_nameservers(statp); -#endif - - if (statp->defdname[0] == 0 && - gethostname(buf, sizeof(statp->defdname) - 1) == 0 && - (cp = strchr(buf, '.')) != NULL) - strcpy(statp->defdname, cp + 1); - - /* find components of local domain that might be searched */ - if (havesearch == 0) { - pp = statp->dnsrch; - *pp++ = statp->defdname; - *pp = NULL; - - dots = 0; - for (cp = statp->defdname; *cp; cp++) - dots += (*cp == '.'); - - cp = statp->defdname; - while (pp < statp->dnsrch + MAXDFLSRCH) { - if (dots < LOCALDOMAINPARTS) - break; - cp = strchr(cp, '.') + 1; /* we know there is one */ - *pp++ = cp; - dots--; - } - *pp = NULL; -#ifdef DEBUG - if (statp->options & RES_DEBUG) { - printf(";; res_init()... default dnsrch list:\n"); - for (pp = statp->dnsrch; *pp; pp++) - printf(";;\t%s\n", *pp); - printf(";;\t..END..\n"); - } -#endif - } - - if ((cp = getenv("RES_OPTIONS")) != NULL) - res_setoptions(statp, cp, "env"); - if (nserv > 0) { - statp->nscount = nserv; - statp->options |= RES_INIT; - } - return (0); -} - -static void -res_setoptions(res_state statp, const char *options, const char *source) -{ - const char *cp = options; - int i; - struct __res_state_ext *ext = statp->_u._ext.ext; - -#ifdef DEBUG - if (statp->options & RES_DEBUG) - printf(";; res_setoptions(\"%s\", \"%s\")...\n", - options, source); -#endif - while (*cp) { - /* skip leading and inner runs of spaces */ - while (*cp == ' ' || *cp == '\t') - cp++; - /* search for and process individual options */ - if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) { - i = atoi(cp + sizeof("ndots:") - 1); - if (i <= RES_MAXNDOTS) - statp->ndots = i; - else - statp->ndots = RES_MAXNDOTS; -#ifdef DEBUG - if (statp->options & RES_DEBUG) - printf(";;\tndots=%d\n", statp->ndots); -#endif - } else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) { - i = atoi(cp + sizeof("timeout:") - 1); - if (i <= RES_MAXRETRANS) - statp->retrans = i; - else - statp->retrans = RES_MAXRETRANS; -#ifdef DEBUG - if (statp->options & RES_DEBUG) - printf(";;\ttimeout=%d\n", statp->retrans); -#endif - } else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){ - i = atoi(cp + sizeof("attempts:") - 1); - if (i <= RES_MAXRETRY) - statp->retry = i; - else - statp->retry = RES_MAXRETRY; -#ifdef DEBUG - if (statp->options & RES_DEBUG) - printf(";;\tattempts=%d\n", statp->retry); -#endif - } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) { -#ifdef DEBUG - if (!(statp->options & RES_DEBUG)) { - printf(";; res_setoptions(\"%s\", \"%s\")..\n", - options, source); - statp->options |= RES_DEBUG; - } - printf(";;\tdebug\n"); -#endif - } else if (!strncmp(cp, "no_tld_query", - sizeof("no_tld_query") - 1) || - !strncmp(cp, "no-tld-query", - sizeof("no-tld-query") - 1)) { - statp->options |= RES_NOTLDQUERY; - } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) { - statp->options |= RES_USE_INET6; - } else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) { - statp->options |= RES_ROTATE; - } else if (!strncmp(cp, "no-check-names", - sizeof("no-check-names") - 1)) { - statp->options |= RES_NOCHECKNAME; - } -#ifdef RES_USE_EDNS0 - else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) { - statp->options |= RES_USE_EDNS0; - } -#endif - else if (!strncmp(cp, "dname", sizeof("dname") - 1)) { - statp->options |= RES_USE_DNAME; - } - else if (!strncmp(cp, "nibble:", sizeof("nibble:") - 1)) { - if (ext == NULL) - goto skip; - cp += sizeof("nibble:") - 1; - i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix) - 1); - strncpy(ext->nsuffix, cp, (size_t)i); - ext->nsuffix[i] = '\0'; - } - else if (!strncmp(cp, "nibble2:", sizeof("nibble2:") - 1)) { - if (ext == NULL) - goto skip; - cp += sizeof("nibble2:") - 1; - i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix2) - 1); - strncpy(ext->nsuffix2, cp, (size_t)i); - ext->nsuffix2[i] = '\0'; - } - else if (!strncmp(cp, "v6revmode:", sizeof("v6revmode:") - 1)) { - cp += sizeof("v6revmode:") - 1; - /* "nibble" and "bitstring" used to be valid */ - if (!strncmp(cp, "single", sizeof("single") - 1)) { - statp->options |= RES_NO_NIBBLE2; - } else if (!strncmp(cp, "both", sizeof("both") - 1)) { - statp->options &= - ~RES_NO_NIBBLE2; - } - } - else { - /* XXX - print a warning here? */ - } - skip: - /* skip to next run of spaces */ - while (*cp && *cp != ' ' && *cp != '\t') - cp++; - } -} - -/* XXX - should really support CIDR which means explicit masks always. */ -static u_int32_t -net_mask(in) /* XXX - should really use system's version of this */ - struct in_addr in; -{ - register u_int32_t i = ntohl(in.s_addr); - - if (IN_CLASSA(i)) - return (htonl(IN_CLASSA_NET)); - else if (IN_CLASSB(i)) - return (htonl(IN_CLASSB_NET)); - return (htonl(IN_CLASSC_NET)); -} - -u_int -res_randomid(void) { - struct timeval now; - - gettimeofday(&now, NULL); - return (0xffff & (now.tv_sec ^ now.tv_usec ^ getpid())); -} - -/* - * This routine is for closing the socket if a virtual circuit is used and - * the program wants to close it. This provides support for endhostent() - * which expects to close the socket. - * - * This routine is not expected to be user visible. - */ -void -res_nclose(res_state statp) { - int ns; - - if (statp->_vcsock >= 0) { - (void) close(statp->_vcsock); - statp->_vcsock = -1; - statp->_flags &= ~(RES_F_VC | RES_F_CONN); - } - for (ns = 0; ns < statp->_u._ext.nscount; ns++) { - if (statp->_u._ext.nssocks[ns] != -1) { - (void) close(statp->_u._ext.nssocks[ns]); - statp->_u._ext.nssocks[ns] = -1; - } - } -} - -void -res_ndestroy(res_state statp) { - res_nclose(statp); - if (statp->_u._ext.ext != NULL) - free(statp->_u._ext.ext); - statp->options &= ~RES_INIT; - statp->_u._ext.ext = NULL; -} - -const char * -res_get_nibblesuffix(res_state statp) { - if (statp->_u._ext.ext) - return (statp->_u._ext.ext->nsuffix); - return ("ip6.arpa"); -} - -const char * -res_get_nibblesuffix2(res_state statp) { - if (statp->_u._ext.ext) - return (statp->_u._ext.ext->nsuffix2); - return ("ip6.int"); -} - -void -res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt) { - int i, nserv; - size_t size; - - /* close open servers */ - res_nclose(statp); - - /* cause rtt times to be forgotten */ - statp->_u._ext.nscount = 0; - - nserv = 0; - for (i = 0; i < cnt && nserv < MAXNS; i++) { - switch (set->sin.sin_family) { - case AF_INET: - size = sizeof(set->sin); - if (statp->_u._ext.ext) - memcpy(&statp->_u._ext.ext->nsaddrs[nserv], - &set->sin, size); - if (size <= sizeof(statp->nsaddr_list[nserv])) - memcpy(&statp->nsaddr_list[nserv], - &set->sin, size); -#ifdef notdef - else - statp->nsaddr_list[nserv].sin_family = 0; -#endif - nserv++; - break; - -#ifdef HAS_INET6_STRUCTS - case AF_INET6: - size = sizeof(set->sin6); - if (statp->_u._ext.ext) - memcpy(&statp->_u._ext.ext->nsaddrs[nserv], - &set->sin6, size); - if (size <= sizeof(statp->nsaddr_list[nserv])) - memcpy(&statp->nsaddr_list[nserv], - &set->sin6, size); - else - statp->nsaddr_list[nserv].sin_family = 0; - nserv++; - break; -#endif - - default: - break; - } - set++; - } - statp->nscount = nserv; - -} - -int -res_getservers(res_state statp, union res_sockaddr_union *set, int cnt) { - int i; - size_t size; - u_int16_t family; - - for (i = 0; i < statp->nscount && i < cnt; i++) { - if (statp->_u._ext.ext) - family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family; - else - family = statp->nsaddr_list[i].sin_family; - - switch (family) { - case AF_INET: - size = sizeof(set->sin); - if (statp->_u._ext.ext) - memcpy(&set->sin, - &statp->_u._ext.ext->nsaddrs[i], - size); - else - memcpy(&set->sin, &statp->nsaddr_list[i], - size); - break; - -#ifdef HAS_INET6_STRUCTS - case AF_INET6: - size = sizeof(set->sin6); - if (statp->_u._ext.ext) - memcpy(&set->sin6, - &statp->_u._ext.ext->nsaddrs[i], - size); - else - memcpy(&set->sin6, &statp->nsaddr_list[i], - size); - break; -#endif - - default: - set->sin.sin_family = 0; - break; - } - set++; - } - return (statp->nscount); -} - -#ifdef ANDROID_CHANGES -static int _get_dns_change_count() -{ - if (dns_change_prop == NULL) { - dns_change_prop = __system_property_find(DNS_CHANGE_PROP_NAME); - } - if (dns_change_prop != NULL) { - char propvalue[PROP_VALUE_MAX]; - if (__system_property_read(dns_change_prop, NULL, propvalue) >= 1) { - return atoi(propvalue); - } - } - return -1; -} - -int res_get_dns_changed() -{ - int change_count; - - change_count = _get_dns_change_count(); - if (change_count != dns_last_change_counter) { - if (change_count != -1) { - dns_last_change_counter = change_count; - } - return 1; - } else { - return 0; - } -} -#endif /* ANDROID_CHANGES */ |