2 * Copyright (c) 1985, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies, and that
40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
42 * specific, written prior permission.
44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
55 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
56 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
58 * Permission to use, copy, modify, and distribute this software for any
59 * purpose with or without fee is hereby granted, provided that the above
60 * copyright notice and this permission notice appear in all copies.
62 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
63 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
64 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
65 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
66 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
67 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
68 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
71 #if defined(LIBC_SCCS) && !defined(lint)
72 static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
73 static const char rcsid[] = "$Id: res_init.c,v 1.9.2.5.4.6 2006/08/30 23:23:01 marka Exp $";
74 #endif /* LIBC_SCCS and not lint */
76 #include "port_before.h"
79 #include "namespace.h"
81 #include <sys/types.h>
82 #include <sys/param.h>
83 #include <sys/socket.h>
86 #include <netinet/in.h>
87 #include <arpa/inet.h>
88 #include <arpa/nameser.h>
97 #include "un-namespace.h"
99 #include "port_after.h"
101 /* ensure that sockaddr_in6 and IN6ADDR_ANY_INIT are declared / defined */
104 #include "res_private.h"
106 /* Options. Should all be left alone. */
111 #include <sys/systeminfo.h>
114 static void res_setoptions __P((res_state, const char *, const char *));
117 static const char sort_mask[] = "/&";
118 #define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
119 static u_int32_t net_mask __P((struct in_addr));
122 #if !defined(isascii) /* XXX - could be a function */
123 # define isascii(c) (!(c & 0200))
127 * Resolver state default settings.
131 * Set up default settings. If the configuration file exist, the values
132 * there will have precedence. Otherwise, the server address is set to
133 * INADDR_ANY and the default domain name comes from the gethostname().
135 * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
136 * rather than INADDR_ANY ("0.0.0.0") as the default name server address
137 * since it was noted that INADDR_ANY actually meant ``the first interface
138 * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
139 * it had to be "up" in order for you to reach your own name server. It
140 * was later decided that since the recommended practice is to always
141 * install local static routes through 127.0.0.1 for all your network
142 * interfaces, that we could solve this problem without a code change.
144 * The configuration file should always be used, since it is the only way
145 * to specify a default domain. If you are running a server on your local
146 * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
147 * in the configuration file.
149 * Return 0 if completes successfully, -1 on error
152 res_ninit(res_state statp) {
153 extern int __res_vinit(res_state, int);
155 return (__res_vinit(statp, 0));
158 /* This function has to be reachable by res_data.c but not publically. */
160 __res_vinit(res_state statp, int preinit) {
162 register char *cp, **pp;
165 int nserv = 0; /* number of nameserver records read from file */
173 union res_sockaddr_union u[2];
175 if (statp->_u._ext.ext != NULL)
179 statp->retrans = RES_TIMEOUT;
180 statp->retry = RES_DFLRETRY;
181 statp->options = RES_DEFAULT;
182 statp->id = res_randomid();
185 memset(u, 0, sizeof(u));
187 u[nserv].sin.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
189 u[nserv].sin.sin_addr.s_addr = INADDR_ANY;
191 u[nserv].sin.sin_family = AF_INET;
192 u[nserv].sin.sin_port = htons(NAMESERVER_PORT);
194 u[nserv].sin.sin_len = sizeof(struct sockaddr_in);
197 #ifdef HAS_INET6_STRUCTS
199 u[nserv].sin6.sin6_addr = in6addr_loopback;
201 u[nserv].sin6.sin6_addr = in6addr_any;
203 u[nserv].sin6.sin6_family = AF_INET6;
204 u[nserv].sin6.sin6_port = htons(NAMESERVER_PORT);
206 u[nserv].sin6.sin6_len = sizeof(struct sockaddr_in6);
217 statp->_u._ext.nscount = 0;
218 statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext));
219 if (statp->_u._ext.ext != NULL) {
220 memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext));
221 statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
222 strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
223 strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
229 res_setservers(statp, u, nserv);
233 * The old libresolv derived the defaultdomain from NIS/NIS+.
234 * We want to keep this behaviour
237 char buf[sizeof(statp->defdname)], *cp;
240 if ((ret = sysinfo(SI_SRPC_DOMAIN, buf, sizeof(buf))) > 0 &&
241 (unsigned int)ret <= sizeof(buf)) {
244 cp = strchr(buf, '.');
245 cp = (cp == NULL) ? buf : (cp + 1);
246 if (strlen(cp) >= sizeof(statp->defdname))
248 strcpy(statp->defdname, cp);
251 #endif /* SOLARIS2 */
253 /* Allow user to override the local domain definition */
254 if (issetugid() == 0 && (cp = getenv("LOCALDOMAIN")) != NULL) {
255 (void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
256 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
260 * Set search list to be blank-separated strings
261 * from rest of env value. Permits users of LOCALDOMAIN
262 * to still have a search list, and anyone to set the
263 * one that they want to use as an individual (even more
264 * important now that the rfc1535 stuff restricts searches)
266 cp = statp->defdname;
269 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
270 if (*cp == '\n') /* silly backwards compat */
272 else if (*cp == ' ' || *cp == '\t') {
281 /* null terminate last domain if there are excess */
282 while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
288 #define MATCH(line, name) \
289 (!strncmp(line, name, sizeof(name) - 1) && \
290 (line[sizeof(name) - 1] == ' ' || \
291 line[sizeof(name) - 1] == '\t'))
294 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
295 /* read the config file */
296 while (fgets(buf, sizeof(buf), fp) != NULL) {
298 if (*buf == ';' || *buf == '#')
300 /* read default domain name */
301 if (MATCH(buf, "domain")) {
302 if (haveenv) /* skip if have from environ */
304 cp = buf + sizeof("domain") - 1;
305 while (*cp == ' ' || *cp == '\t')
307 if ((*cp == '\0') || (*cp == '\n'))
309 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
310 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
311 if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
316 /* set search list */
317 if (MATCH(buf, "search")) {
318 if (haveenv) /* skip if have from environ */
320 cp = buf + sizeof("search") - 1;
321 while (*cp == ' ' || *cp == '\t')
323 if ((*cp == '\0') || (*cp == '\n'))
325 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
326 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
327 if ((cp = strchr(statp->defdname, '\n')) != NULL)
330 * Set search list to be blank-separated strings
333 cp = statp->defdname;
336 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
337 if (*cp == ' ' || *cp == '\t') {
345 /* null terminate last domain if there are excess */
346 while (*cp != '\0' && *cp != ' ' && *cp != '\t')
353 /* read nameservers to query */
354 if (MATCH(buf, "nameserver") && nserv < MAXNS) {
355 struct addrinfo hints, *ai;
356 char sbuf[NI_MAXSERV];
357 const size_t minsiz =
358 sizeof(statp->_u._ext.ext->nsaddrs[0]);
360 cp = buf + sizeof("nameserver") - 1;
361 while (*cp == ' ' || *cp == '\t')
363 cp[strcspn(cp, ";# \t\n")] = '\0';
364 if ((*cp != '\0') && (*cp != '\n')) {
365 memset(&hints, 0, sizeof(hints));
366 hints.ai_family = PF_UNSPEC;
367 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
368 hints.ai_flags = AI_NUMERICHOST;
369 sprintf(sbuf, "%u", NAMESERVER_PORT);
370 if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 &&
371 ai->ai_addrlen <= minsiz) {
372 if (statp->_u._ext.ext != NULL) {
373 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
374 ai->ai_addr, ai->ai_addrlen);
376 if (ai->ai_addrlen <=
377 sizeof(statp->nsaddr_list[nserv])) {
378 memcpy(&statp->nsaddr_list[nserv],
379 ai->ai_addr, ai->ai_addrlen);
381 statp->nsaddr_list[nserv].sin_family = 0;
389 if (MATCH(buf, "sortlist")) {
394 struct __res_state_ext *ext = statp->_u._ext.ext;
396 cp = buf + sizeof("sortlist") - 1;
397 while (nsort < MAXRESOLVSORT) {
398 while (*cp == ' ' || *cp == '\t')
400 if (*cp == '\0' || *cp == '\n' || *cp == ';')
403 while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
404 isascii(*cp) && !isspace((unsigned char)*cp))
408 if (inet_aton(net, &a)) {
409 statp->sort_list[nsort].addr = a;
413 while (*cp && *cp != ';' &&
415 !isspace((unsigned char)*cp))
419 if (inet_aton(net, &a)) {
420 statp->sort_list[nsort].mask = a.s_addr;
422 statp->sort_list[nsort].mask =
423 net_mask(statp->sort_list[nsort].addr);
426 statp->sort_list[nsort].mask =
427 net_mask(statp->sort_list[nsort].addr);
429 ext->sort_list[nsort].af = AF_INET;
430 ext->sort_list[nsort].addr.ina =
431 statp->sort_list[nsort].addr;
432 ext->sort_list[nsort].mask.ina.s_addr =
433 statp->sort_list[nsort].mask;
436 else if (inet_pton(AF_INET6, net, &a6) == 1) {
438 ext->sort_list[nsort].af = AF_INET6;
439 ext->sort_list[nsort].addr.in6a = a6;
440 u = (u_char *)&ext->sort_list[nsort].mask.in6a;
443 while (*cp && *cp != ';' &&
444 isascii(*cp) && !isspace(*cp))
454 if (inet_pton(AF_INET6, net, u) == 1) {
460 m = sizeof(struct in6_addr) * CHAR_BIT;
464 for (i = 0; i < sizeof(struct in6_addr); i++) {
476 statp->sort_list[nsort].addr.s_addr =
477 (u_int32_t)0xffffffff;
478 statp->sort_list[nsort].mask =
479 (u_int32_t)0xffffffff;
487 if (MATCH(buf, "options")) {
488 res_setoptions(statp, buf + sizeof("options") - 1, "conf");
493 statp->nscount = nserv;
495 statp->nsort = nsort;
500 * Last chance to get a nameserver. This should not normally
503 #ifdef NO_RESOLV_CONF
505 nserv = get_nameservers(statp);
508 if (statp->defdname[0] == 0 &&
509 gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
510 (cp = strchr(buf, '.')) != NULL)
511 strcpy(statp->defdname, cp + 1);
513 /* find components of local domain that might be searched */
514 if (havesearch == 0) {
516 *pp++ = statp->defdname;
520 for (cp = statp->defdname; *cp; cp++)
521 dots += (*cp == '.');
523 cp = statp->defdname;
524 while (pp < statp->dnsrch + MAXDFLSRCH) {
525 if (dots < LOCALDOMAINPARTS)
527 cp = strchr(cp, '.') + 1; /* we know there is one */
533 if (statp->options & RES_DEBUG) {
534 printf(";; res_init()... default dnsrch list:\n");
535 for (pp = statp->dnsrch; *pp; pp++)
536 printf(";;\t%s\n", *pp);
537 printf(";;\t..END..\n");
543 statp->options |= RES_NOALIASES;
544 else if ((cp = getenv("RES_OPTIONS")) != NULL)
545 res_setoptions(statp, cp, "env");
546 statp->options |= RES_INIT;
551 if (statp->_u._ext.ext != NULL) {
552 free(statp->_u._ext.ext);
553 statp->_u._ext.ext = NULL;
560 res_setoptions(res_state statp, const char *options, const char *source)
562 const char *cp = options;
565 struct __res_state_ext *ext = statp->_u._ext.ext;
569 if (statp->options & RES_DEBUG)
570 printf(";; res_setoptions(\"%s\", \"%s\")...\n",
574 /* skip leading and inner runs of spaces */
575 while (*cp == ' ' || *cp == '\t')
577 /* search for and process individual options */
578 if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
579 i = atoi(cp + sizeof("ndots:") - 1);
580 if (i <= RES_MAXNDOTS)
583 statp->ndots = RES_MAXNDOTS;
585 if (statp->options & RES_DEBUG)
586 printf(";;\tndots=%d\n", statp->ndots);
588 } else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
589 i = atoi(cp + sizeof("timeout:") - 1);
590 if (i <= RES_MAXRETRANS)
593 statp->retrans = RES_MAXRETRANS;
595 if (statp->options & RES_DEBUG)
596 printf(";;\ttimeout=%d\n", statp->retrans);
599 } else if (!strncmp(cp, "retrans:", sizeof("retrans:") - 1)) {
601 * For backward compatibility, 'retrans' is
602 * supported as an alias for 'timeout', though
603 * without an imposed maximum.
605 statp->retrans = atoi(cp + sizeof("retrans:") - 1);
606 } else if (!strncmp(cp, "retry:", sizeof("retry:") - 1)){
608 * For backward compatibility, 'retry' is
609 * supported as an alias for 'attempts', though
610 * without an imposed maximum.
612 statp->retry = atoi(cp + sizeof("retry:") - 1);
613 #endif /* SOLARIS2 */
614 } else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
615 i = atoi(cp + sizeof("attempts:") - 1);
616 if (i <= RES_MAXRETRY)
619 statp->retry = RES_MAXRETRY;
621 if (statp->options & RES_DEBUG)
622 printf(";;\tattempts=%d\n", statp->retry);
624 } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
626 if (!(statp->options & RES_DEBUG)) {
627 printf(";; res_setoptions(\"%s\", \"%s\")..\n",
629 statp->options |= RES_DEBUG;
631 printf(";;\tdebug\n");
633 } else if (!strncmp(cp, "no_tld_query",
634 sizeof("no_tld_query") - 1) ||
635 !strncmp(cp, "no-tld-query",
636 sizeof("no-tld-query") - 1)) {
637 statp->options |= RES_NOTLDQUERY;
638 } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
639 statp->options |= RES_USE_INET6;
640 } else if (!strncmp(cp, "insecure1", sizeof("insecure1") - 1)) {
641 statp->options |= RES_INSECURE1;
642 } else if (!strncmp(cp, "insecure2", sizeof("insecure2") - 1)) {
643 statp->options |= RES_INSECURE2;
644 } else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
645 statp->options |= RES_ROTATE;
646 } else if (!strncmp(cp, "no-check-names",
647 sizeof("no-check-names") - 1)) {
648 statp->options |= RES_NOCHECKNAME;
651 else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
652 statp->options |= RES_USE_EDNS0;
656 else if (!strncmp(cp, "dname", sizeof("dname") - 1)) {
657 statp->options |= RES_USE_DNAME;
659 else if (!strncmp(cp, "nibble:", sizeof("nibble:") - 1)) {
662 cp += sizeof("nibble:") - 1;
663 i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix) - 1);
664 strncpy(ext->nsuffix, cp, i);
665 ext->nsuffix[i] = '\0';
667 else if (!strncmp(cp, "nibble2:", sizeof("nibble2:") - 1)) {
670 cp += sizeof("nibble2:") - 1;
671 i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix2) - 1);
672 strncpy(ext->nsuffix2, cp, i);
673 ext->nsuffix2[i] = '\0';
675 else if (!strncmp(cp, "v6revmode:", sizeof("v6revmode:") - 1)) {
676 cp += sizeof("v6revmode:") - 1;
677 /* "nibble" and "bitstring" used to be valid */
678 if (!strncmp(cp, "single", sizeof("single") - 1)) {
679 statp->options |= RES_NO_NIBBLE2;
680 } else if (!strncmp(cp, "both", sizeof("both") - 1)) {
687 /* XXX - print a warning here? */
692 /* skip to next run of spaces */
693 while (*cp && *cp != ' ' && *cp != '\t')
699 /* XXX - should really support CIDR which means explicit masks always. */
701 net_mask(in) /* XXX - should really use system's version of this */
704 register u_int32_t i = ntohl(in.s_addr);
707 return (htonl(IN_CLASSA_NET));
708 else if (IN_CLASSB(i))
709 return (htonl(IN_CLASSB_NET));
710 return (htonl(IN_CLASSC_NET));
718 gettimeofday(&now, NULL);
719 return (0xffff & (now.tv_sec ^ now.tv_usec ^ getpid()));
723 * This routine is for closing the socket if a virtual circuit is used and
724 * the program wants to close it. This provides support for endhostent()
725 * which expects to close the socket.
727 * This routine is not expected to be user visible.
730 res_nclose(res_state statp) {
733 if (statp->_vcsock >= 0) {
735 (void) close(statp->_vcsock);
737 _close(statp->_vcsock);
740 statp->_flags &= ~(RES_F_VC | RES_F_CONN);
742 for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
743 if (statp->_u._ext.nssocks[ns] != -1) {
745 (void) close(statp->_u._ext.nssocks[ns]);
747 _close(statp->_u._ext.nssocks[ns]);
749 statp->_u._ext.nssocks[ns] = -1;
755 res_ndestroy(res_state statp) {
757 if (statp->_u._ext.ext != NULL)
758 free(statp->_u._ext.ext);
759 statp->options &= ~RES_INIT;
760 statp->_u._ext.ext = NULL;
765 res_get_nibblesuffix(res_state statp) {
766 if (statp->_u._ext.ext)
767 return (statp->_u._ext.ext->nsuffix);
772 res_get_nibblesuffix2(res_state statp) {
773 if (statp->_u._ext.ext)
774 return (statp->_u._ext.ext->nsuffix2);
780 res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt) {
784 /* close open servers */
787 /* cause rtt times to be forgotten */
788 statp->_u._ext.nscount = 0;
791 for (i = 0; i < cnt && nserv < MAXNS; i++) {
792 switch (set->sin.sin_family) {
794 size = sizeof(set->sin);
795 if (statp->_u._ext.ext)
796 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
798 if (size <= sizeof(statp->nsaddr_list[nserv]))
799 memcpy(&statp->nsaddr_list[nserv],
802 statp->nsaddr_list[nserv].sin_family = 0;
806 #ifdef HAS_INET6_STRUCTS
808 size = sizeof(set->sin6);
809 if (statp->_u._ext.ext)
810 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
812 if (size <= sizeof(statp->nsaddr_list[nserv]))
813 memcpy(&statp->nsaddr_list[nserv],
816 statp->nsaddr_list[nserv].sin_family = 0;
826 statp->nscount = nserv;
831 res_getservers(res_state statp, union res_sockaddr_union *set, int cnt) {
836 for (i = 0; i < statp->nscount && i < cnt; i++) {
837 if (statp->_u._ext.ext)
838 family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family;
840 family = statp->nsaddr_list[i].sin_family;
844 size = sizeof(set->sin);
845 if (statp->_u._ext.ext)
847 &statp->_u._ext.ext->nsaddrs[i],
850 memcpy(&set->sin, &statp->nsaddr_list[i],
854 #ifdef HAS_INET6_STRUCTS
856 size = sizeof(set->sin6);
857 if (statp->_u._ext.ext)
859 &statp->_u._ext.ext->nsaddrs[i],
862 memcpy(&set->sin6, &statp->nsaddr_list[i],
868 set->sin.sin_family = 0;
873 return (statp->nscount);