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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
52 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
54 * Permission to use, copy, modify, and distribute this software for any
55 * purpose with or without fee is hereby granted, provided that the above
56 * copyright notice and this permission notice appear in all copies.
58 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
59 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
60 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
61 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
62 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
63 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
64 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
67 #if defined(LIBC_SCCS) && !defined(lint)
68 static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
69 static const char rcsid[] = "$Id: res_init.c,v 1.9.2.5.4.6 2006/08/30 23:23:01 marka Exp $";
70 #endif /* LIBC_SCCS and not lint */
71 #include <sys/cdefs.h>
72 __FBSDID("$FreeBSD$");
74 #include "port_before.h"
76 #include "namespace.h"
78 #include <sys/types.h>
79 #include <sys/param.h>
80 #include <sys/socket.h>
83 #include <netinet/in.h>
84 #include <arpa/inet.h>
85 #include <arpa/nameser.h>
94 #include "un-namespace.h"
96 #include "port_after.h"
98 /* ensure that sockaddr_in6 and IN6ADDR_ANY_INIT are declared / defined */
101 #include "res_private.h"
103 /* Options. Should all be left alone. */
108 #include <sys/systeminfo.h>
111 static void res_setoptions(res_state, const char *, const char *);
114 static const char sort_mask[] = "/&";
115 #define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
116 static u_int32_t net_mask(struct in_addr);
119 #if !defined(isascii) /* XXX - could be a function */
120 # define isascii(c) (!(c & 0200))
124 * Resolver state default settings.
128 * Set up default settings. If the configuration file exist, the values
129 * there will have precedence. Otherwise, the server address is set to
130 * INADDR_ANY and the default domain name comes from the gethostname().
132 * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
133 * rather than INADDR_ANY ("0.0.0.0") as the default name server address
134 * since it was noted that INADDR_ANY actually meant ``the first interface
135 * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
136 * it had to be "up" in order for you to reach your own name server. It
137 * was later decided that since the recommended practice is to always
138 * install local static routes through 127.0.0.1 for all your network
139 * interfaces, that we could solve this problem without a code change.
141 * The configuration file should always be used, since it is the only way
142 * to specify a default domain. If you are running a server on your local
143 * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
144 * in the configuration file.
146 * Return 0 if completes successfully, -1 on error
149 res_ninit(res_state statp) {
150 extern int __res_vinit(res_state, int);
152 return (__res_vinit(statp, 0));
155 /* This function has to be reachable by res_data.c but not publically. */
157 __res_vinit(res_state statp, int preinit) {
162 int nserv = 0; /* number of nameserver records read from file */
170 union res_sockaddr_union u[2];
172 if (statp->_u._ext.ext != NULL)
176 statp->retrans = RES_TIMEOUT;
177 statp->retry = RES_DFLRETRY;
178 statp->options = RES_DEFAULT;
179 statp->id = res_randomid();
182 memset(u, 0, sizeof(u));
184 u[nserv].sin.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
186 u[nserv].sin.sin_addr.s_addr = INADDR_ANY;
188 u[nserv].sin.sin_family = AF_INET;
189 u[nserv].sin.sin_port = htons(NAMESERVER_PORT);
191 u[nserv].sin.sin_len = sizeof(struct sockaddr_in);
194 #ifdef HAS_INET6_STRUCTS
196 u[nserv].sin6.sin6_addr = in6addr_loopback;
198 u[nserv].sin6.sin6_addr = in6addr_any;
200 u[nserv].sin6.sin6_family = AF_INET6;
201 u[nserv].sin6.sin6_port = htons(NAMESERVER_PORT);
203 u[nserv].sin6.sin6_len = sizeof(struct sockaddr_in6);
214 statp->_u._ext.nscount = 0;
215 statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext));
216 if (statp->_u._ext.ext != NULL) {
217 memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext));
218 statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
219 strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
220 strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
226 res_setservers(statp, u, nserv);
230 * The old libresolv derived the defaultdomain from NIS/NIS+.
231 * We want to keep this behaviour
234 char buf[sizeof(statp->defdname)], *cp;
237 if ((ret = sysinfo(SI_SRPC_DOMAIN, buf, sizeof(buf))) > 0 &&
238 (unsigned int)ret <= sizeof(buf)) {
241 cp = strchr(buf, '.');
242 cp = (cp == NULL) ? buf : (cp + 1);
243 if (strlen(cp) >= sizeof(statp->defdname))
245 strcpy(statp->defdname, cp);
248 #endif /* SOLARIS2 */
250 /* Allow user to override the local domain definition */
251 if (issetugid() == 0 && (cp = getenv("LOCALDOMAIN")) != NULL) {
252 (void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
253 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
257 * Set search list to be blank-separated strings
258 * from rest of env value. Permits users of LOCALDOMAIN
259 * to still have a search list, and anyone to set the
260 * one that they want to use as an individual (even more
261 * important now that the rfc1535 stuff restricts searches)
263 cp = statp->defdname;
266 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
267 if (*cp == '\n') /* silly backwards compat */
269 else if (*cp == ' ' || *cp == '\t') {
278 /* null terminate last domain if there are excess */
279 while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
285 #define MATCH(line, name) \
286 (!strncmp(line, name, sizeof(name) - 1) && \
287 (line[sizeof(name) - 1] == ' ' || \
288 line[sizeof(name) - 1] == '\t'))
291 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
292 /* read the config file */
293 while (fgets(buf, sizeof(buf), fp) != NULL) {
295 if (*buf == ';' || *buf == '#')
297 /* read default domain name */
298 if (MATCH(buf, "domain")) {
299 if (haveenv) /* skip if have from environ */
301 cp = buf + sizeof("domain") - 1;
302 while (*cp == ' ' || *cp == '\t')
304 if ((*cp == '\0') || (*cp == '\n'))
306 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
307 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
308 if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
313 /* set search list */
314 if (MATCH(buf, "search")) {
315 if (haveenv) /* skip if have from environ */
317 cp = buf + sizeof("search") - 1;
318 while (*cp == ' ' || *cp == '\t')
320 if ((*cp == '\0') || (*cp == '\n'))
322 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
323 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
324 if ((cp = strchr(statp->defdname, '\n')) != NULL)
327 * Set search list to be blank-separated strings
330 cp = statp->defdname;
333 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
334 if (*cp == ' ' || *cp == '\t') {
342 /* null terminate last domain if there are excess */
343 while (*cp != '\0' && *cp != ' ' && *cp != '\t')
350 /* read nameservers to query */
351 if (MATCH(buf, "nameserver") && nserv < MAXNS) {
352 struct addrinfo hints, *ai;
353 char sbuf[NI_MAXSERV];
354 const size_t minsiz =
355 sizeof(statp->_u._ext.ext->nsaddrs[0]);
357 cp = buf + sizeof("nameserver") - 1;
358 while (*cp == ' ' || *cp == '\t')
360 cp[strcspn(cp, ";# \t\n")] = '\0';
361 if ((*cp != '\0') && (*cp != '\n')) {
362 memset(&hints, 0, sizeof(hints));
363 hints.ai_family = PF_UNSPEC;
364 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
365 hints.ai_flags = AI_NUMERICHOST;
366 sprintf(sbuf, "%u", NAMESERVER_PORT);
367 if (getaddrinfo(cp, sbuf, &hints, &ai) == 0 &&
368 ai->ai_addrlen <= minsiz) {
369 if (statp->_u._ext.ext != NULL) {
370 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
371 ai->ai_addr, ai->ai_addrlen);
373 if (ai->ai_addrlen <=
374 sizeof(statp->nsaddr_list[nserv])) {
375 memcpy(&statp->nsaddr_list[nserv],
376 ai->ai_addr, ai->ai_addrlen);
378 statp->nsaddr_list[nserv].sin_family = 0;
386 if (MATCH(buf, "sortlist")) {
391 struct __res_state_ext *ext = statp->_u._ext.ext;
393 cp = buf + sizeof("sortlist") - 1;
394 while (nsort < MAXRESOLVSORT) {
395 while (*cp == ' ' || *cp == '\t')
397 if (*cp == '\0' || *cp == '\n' || *cp == ';')
400 while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
401 isascii(*cp) && !isspace((unsigned char)*cp))
405 if (inet_aton(net, &a)) {
406 statp->sort_list[nsort].addr = a;
410 while (*cp && *cp != ';' &&
412 !isspace((unsigned char)*cp))
416 if (inet_aton(net, &a)) {
417 statp->sort_list[nsort].mask = a.s_addr;
419 statp->sort_list[nsort].mask =
420 net_mask(statp->sort_list[nsort].addr);
423 statp->sort_list[nsort].mask =
424 net_mask(statp->sort_list[nsort].addr);
426 ext->sort_list[nsort].af = AF_INET;
427 ext->sort_list[nsort].addr.ina =
428 statp->sort_list[nsort].addr;
429 ext->sort_list[nsort].mask.ina.s_addr =
430 statp->sort_list[nsort].mask;
433 else if (inet_pton(AF_INET6, net, &a6) == 1) {
435 ext->sort_list[nsort].af = AF_INET6;
436 ext->sort_list[nsort].addr.in6a = a6;
437 u = (u_char *)&ext->sort_list[nsort].mask.in6a;
440 while (*cp && *cp != ';' &&
441 isascii(*cp) && !isspace(*cp))
451 if (inet_pton(AF_INET6, net, u) == 1) {
457 m = sizeof(struct in6_addr) * CHAR_BIT;
461 for (i = 0; i < sizeof(struct in6_addr); i++) {
473 statp->sort_list[nsort].addr.s_addr =
474 (u_int32_t)0xffffffff;
475 statp->sort_list[nsort].mask =
476 (u_int32_t)0xffffffff;
484 if (MATCH(buf, "options")) {
485 res_setoptions(statp, buf + sizeof("options") - 1, "conf");
490 statp->nscount = nserv;
492 statp->nsort = nsort;
497 * Last chance to get a nameserver. This should not normally
500 #ifdef NO_RESOLV_CONF
502 nserv = get_nameservers(statp);
505 if (statp->defdname[0] == 0 &&
506 gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
507 (cp = strchr(buf, '.')) != NULL)
508 strcpy(statp->defdname, cp + 1);
510 /* find components of local domain that might be searched */
511 if (havesearch == 0) {
513 *pp++ = statp->defdname;
517 for (cp = statp->defdname; *cp; cp++)
518 dots += (*cp == '.');
520 cp = statp->defdname;
521 while (pp < statp->dnsrch + MAXDFLSRCH) {
522 if (dots < LOCALDOMAINPARTS)
524 cp = strchr(cp, '.') + 1; /* we know there is one */
530 if (statp->options & RES_DEBUG) {
531 printf(";; res_init()... default dnsrch list:\n");
532 for (pp = statp->dnsrch; *pp; pp++)
533 printf(";;\t%s\n", *pp);
534 printf(";;\t..END..\n");
540 statp->options |= RES_NOALIASES;
541 else if ((cp = getenv("RES_OPTIONS")) != NULL)
542 res_setoptions(statp, cp, "env");
543 statp->options |= RES_INIT;
548 if (statp->_u._ext.ext != NULL) {
549 free(statp->_u._ext.ext);
550 statp->_u._ext.ext = NULL;
557 res_setoptions(res_state statp, const char *options, const char *source)
559 const char *cp = options;
562 struct __res_state_ext *ext = statp->_u._ext.ext;
566 if (statp->options & RES_DEBUG)
567 printf(";; res_setoptions(\"%s\", \"%s\")...\n",
571 /* skip leading and inner runs of spaces */
572 while (*cp == ' ' || *cp == '\t')
574 /* search for and process individual options */
575 if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
576 i = atoi(cp + sizeof("ndots:") - 1);
577 if (i <= RES_MAXNDOTS)
580 statp->ndots = RES_MAXNDOTS;
582 if (statp->options & RES_DEBUG)
583 printf(";;\tndots=%d\n", statp->ndots);
585 } else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
586 i = atoi(cp + sizeof("timeout:") - 1);
587 if (i <= RES_MAXRETRANS)
590 statp->retrans = RES_MAXRETRANS;
592 if (statp->options & RES_DEBUG)
593 printf(";;\ttimeout=%d\n", statp->retrans);
596 } else if (!strncmp(cp, "retrans:", sizeof("retrans:") - 1)) {
598 * For backward compatibility, 'retrans' is
599 * supported as an alias for 'timeout', though
600 * without an imposed maximum.
602 statp->retrans = atoi(cp + sizeof("retrans:") - 1);
603 } else if (!strncmp(cp, "retry:", sizeof("retry:") - 1)){
605 * For backward compatibility, 'retry' is
606 * supported as an alias for 'attempts', though
607 * without an imposed maximum.
609 statp->retry = atoi(cp + sizeof("retry:") - 1);
610 #endif /* SOLARIS2 */
611 } else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
612 i = atoi(cp + sizeof("attempts:") - 1);
613 if (i <= RES_MAXRETRY)
616 statp->retry = RES_MAXRETRY;
618 if (statp->options & RES_DEBUG)
619 printf(";;\tattempts=%d\n", statp->retry);
621 } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
623 if (!(statp->options & RES_DEBUG)) {
624 printf(";; res_setoptions(\"%s\", \"%s\")..\n",
626 statp->options |= RES_DEBUG;
628 printf(";;\tdebug\n");
630 } else if (!strncmp(cp, "no_tld_query",
631 sizeof("no_tld_query") - 1) ||
632 !strncmp(cp, "no-tld-query",
633 sizeof("no-tld-query") - 1)) {
634 statp->options |= RES_NOTLDQUERY;
635 } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
636 statp->options |= RES_USE_INET6;
637 } else if (!strncmp(cp, "insecure1", sizeof("insecure1") - 1)) {
638 statp->options |= RES_INSECURE1;
639 } else if (!strncmp(cp, "insecure2", sizeof("insecure2") - 1)) {
640 statp->options |= RES_INSECURE2;
641 } else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
642 statp->options |= RES_ROTATE;
643 } else if (!strncmp(cp, "no-check-names",
644 sizeof("no-check-names") - 1)) {
645 statp->options |= RES_NOCHECKNAME;
648 else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
649 statp->options |= RES_USE_EDNS0;
653 else if (!strncmp(cp, "dname", sizeof("dname") - 1)) {
654 statp->options |= RES_USE_DNAME;
656 else if (!strncmp(cp, "nibble:", sizeof("nibble:") - 1)) {
659 cp += sizeof("nibble:") - 1;
660 i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix) - 1);
661 strncpy(ext->nsuffix, cp, i);
662 ext->nsuffix[i] = '\0';
664 else if (!strncmp(cp, "nibble2:", sizeof("nibble2:") - 1)) {
667 cp += sizeof("nibble2:") - 1;
668 i = MIN(strcspn(cp, " \t"), sizeof(ext->nsuffix2) - 1);
669 strncpy(ext->nsuffix2, cp, i);
670 ext->nsuffix2[i] = '\0';
672 else if (!strncmp(cp, "v6revmode:", sizeof("v6revmode:") - 1)) {
673 cp += sizeof("v6revmode:") - 1;
674 /* "nibble" and "bitstring" used to be valid */
675 if (!strncmp(cp, "single", sizeof("single") - 1)) {
676 statp->options |= RES_NO_NIBBLE2;
677 } else if (!strncmp(cp, "both", sizeof("both") - 1)) {
684 /* XXX - print a warning here? */
689 /* skip to next run of spaces */
690 while (*cp && *cp != ' ' && *cp != '\t')
696 /* XXX - should really support CIDR which means explicit masks always. */
698 net_mask(in) /* XXX - should really use system's version of this */
701 u_int32_t i = ntohl(in.s_addr);
704 return (htonl(IN_CLASSA_NET));
705 else if (IN_CLASSB(i))
706 return (htonl(IN_CLASSB_NET));
707 return (htonl(IN_CLASSC_NET));
715 gettimeofday(&now, NULL);
716 return (0xffff & (now.tv_sec ^ now.tv_usec ^ getpid()));
720 * This routine is for closing the socket if a virtual circuit is used and
721 * the program wants to close it. This provides support for endhostent()
722 * which expects to close the socket.
724 * This routine is not expected to be user visible.
727 res_nclose(res_state statp) {
730 if (statp->_vcsock >= 0) {
731 (void) _close(statp->_vcsock);
733 statp->_flags &= ~(RES_F_VC | RES_F_CONN);
735 for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
736 if (statp->_u._ext.nssocks[ns] != -1) {
737 (void) _close(statp->_u._ext.nssocks[ns]);
738 statp->_u._ext.nssocks[ns] = -1;
744 res_ndestroy(res_state statp) {
746 if (statp->_u._ext.ext != NULL)
747 free(statp->_u._ext.ext);
748 statp->options &= ~RES_INIT;
749 statp->_u._ext.ext = NULL;
754 res_get_nibblesuffix(res_state statp) {
755 if (statp->_u._ext.ext)
756 return (statp->_u._ext.ext->nsuffix);
761 res_get_nibblesuffix2(res_state statp) {
762 if (statp->_u._ext.ext)
763 return (statp->_u._ext.ext->nsuffix2);
769 res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt) {
773 /* close open servers */
776 /* cause rtt times to be forgotten */
777 statp->_u._ext.nscount = 0;
780 for (i = 0; i < cnt && nserv < MAXNS; i++) {
781 switch (set->sin.sin_family) {
783 size = sizeof(set->sin);
784 if (statp->_u._ext.ext)
785 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
787 if (size <= sizeof(statp->nsaddr_list[nserv]))
788 memcpy(&statp->nsaddr_list[nserv],
791 statp->nsaddr_list[nserv].sin_family = 0;
795 #ifdef HAS_INET6_STRUCTS
797 size = sizeof(set->sin6);
798 if (statp->_u._ext.ext)
799 memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
801 if (size <= sizeof(statp->nsaddr_list[nserv]))
802 memcpy(&statp->nsaddr_list[nserv],
805 statp->nsaddr_list[nserv].sin_family = 0;
815 statp->nscount = nserv;
820 res_getservers(res_state statp, union res_sockaddr_union *set, int cnt) {
825 for (i = 0; i < statp->nscount && i < cnt; i++) {
826 if (statp->_u._ext.ext)
827 family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family;
829 family = statp->nsaddr_list[i].sin_family;
833 size = sizeof(set->sin);
834 if (statp->_u._ext.ext)
836 &statp->_u._ext.ext->nsaddrs[i],
839 memcpy(&set->sin, &statp->nsaddr_list[i],
843 #ifdef HAS_INET6_STRUCTS
845 size = sizeof(set->sin6);
846 if (statp->_u._ext.ext)
848 &statp->_u._ext.ext->nsaddrs[i],
851 memcpy(&set->sin6, &statp->nsaddr_list[i],
857 set->sin.sin_family = 0;
862 return (statp->nscount);