libc/resolv/res_init.c

164 res_ninit(res_state statp) {
167 	return (__res_vinit(statp, 0));
172 __res_vinit(res_state statp, int preinit) {
188 	RES_SET_H_ERRNO(statp, 0);
189 	if (statp->_u._ext.ext != NULL)
190 		res_ndestroy(statp);
193 		statp->retrans = RES_TIMEOUT;
194 		statp->retry = RES_DFLRETRY;
195 		statp->options = RES_DEFAULT;
198 	statp->_rnd = malloc(16);
199 	res_rndinit(statp);
200 	statp->id = res_nrandomid(statp);
227 	statp->nscount = 0;
228 	statp->ndots = 1;
229 	statp->pfcode = 0;
230 	statp->_vcsock = -1;
231 	statp->_flags = 0;
232 	statp->qhook = NULL;
233 	statp->rhook = NULL;
234 	statp->_u._ext.nscount = 0;
235 	statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext));
236 	if (statp->_u._ext.ext != NULL) {
237 	        memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext));
238 		statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
239 		strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
240 		strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
241 		statp->_u._ext.ext->reload_period = 2;
255 		RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
259 	statp->nsort = 0;
261 	res_setservers(statp, u, nserv);
269 		char buf[sizeof(statp->defdname)], *cp;
278 			strncpy(statp->defdname, cp,
279 				sizeof(statp->defdname) - 1);
280 			statp->defdname[sizeof(statp->defdname) - 1] = '\0';
287 		(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
288 		statp->defdname[sizeof(statp->defdname) - 1] = '\0';
298 		cp = statp->defdname;
299 		pp = statp->dnsrch;
301 		for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
330 	    if (statp->_u._ext.ext != NULL) {
332 		    statp->_u._ext.ext->conf_mtim = sb.st_mtim;
334 			statp->_u._ext.ext->conf_stat = now.tv_sec;
353 		    strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
354 		    statp->defdname[sizeof(statp->defdname) - 1] = '\0';
355 		    if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
369 		    strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
370 		    statp->defdname[sizeof(statp->defdname) - 1] = '\0';
371 		    if ((cp = strchr(statp->defdname, '\n')) != NULL)
377 		    cp = statp->defdname;
378 		    pp = statp->dnsrch;
380 		    for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
402 		        sizeof(statp->_u._ext.ext->nsaddrs[0]);
416 				if (statp->_u._ext.ext != NULL) {
417 				    memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
421 				    sizeof(statp->nsaddr_list[nserv])) {
422 				    memcpy(&statp->nsaddr_list[nserv],
425 				    statp->nsaddr_list[nserv].sin_family = 0;
439 		    struct __res_state_ext *ext = statp->_u._ext.ext;
454 			    statp->sort_list[nsort].addr = a;
465 				    statp->sort_list[nsort].mask = a.s_addr;
467 				    statp->sort_list[nsort].mask =
468 					net_mask(statp->sort_list[nsort].addr);
471 				statp->sort_list[nsort].mask =
472 				    net_mask(statp->sort_list[nsort].addr);
476 				statp->sort_list[nsort].addr;
478 				statp->sort_list[nsort].mask;
521 			    statp->sort_list[nsort].addr.s_addr =
523 			    statp->sort_list[nsort].mask =
533 		    res_setoptions(statp, buf + sizeof("options") - 1, "conf");
538 		statp->nscount = nserv;
540 	    statp->nsort = nsort;
550 		nserv = get_nameservers(statp);
553 	if (statp->defdname[0] == 0 &&
554 	    gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
556 		strcpy(statp->defdname, cp + 1);
560 		pp = statp->dnsrch;
561 		*pp++ = statp->defdname;
565 		for (cp = statp->defdname; *cp; cp++)
568 		cp = statp->defdname;
569 		while (pp < statp->dnsrch + MAXDFLSRCH) {
578 		if (statp->options & RES_DEBUG) {
580 			for (pp = statp->dnsrch; *pp; pp++)
588 		statp->options |= RES_NOALIASES;
590 		res_setoptions(statp, cp, "env");
591 	statp->options |= RES_INIT;
592 	return (statp->res_h_errno);
596 res_setoptions(res_state statp, const char *options, const char *source)
600 	struct __res_state_ext *ext = statp->_u._ext.ext;
603 	if (statp->options & RES_DEBUG)
615 				statp->ndots = i;
617 				statp->ndots = RES_MAXNDOTS;
619 			if (statp->options & RES_DEBUG)
620 				printf(";;\tndots=%d\n", statp->ndots);
625 				statp->retrans = i;
627 				statp->retrans = RES_MAXRETRANS;
629 			if (statp->options & RES_DEBUG)
630 				printf(";;\ttimeout=%d\n", statp->retrans);
639 			statp->retrans = atoi(cp + sizeof("retrans:") - 1);
646 			statp->retry = atoi(cp + sizeof("retry:") - 1);
651 				statp->retry = i;
653 				statp->retry = RES_MAXRETRY;
655 			if (statp->options & RES_DEBUG)
656 				printf(";;\tattempts=%d\n", statp->retry);
660 			if (!(statp->options & RES_DEBUG)) {
663 				statp->options |= RES_DEBUG;
671 			statp->options |= RES_NOTLDQUERY;
673 			statp->options |= RES_USE_INET6;
675 		       statp->options |= RES_INSECURE1;
677 		       statp->options |= RES_INSECURE2;
679 			statp->options |= RES_ROTATE;
681 			statp->options |= RES_USEVC;
684 			statp->options |= RES_NOCHECKNAME;
694 			statp->options |= RES_USE_EDNS0;
699 			statp->options |= RES_USE_DNAME;
721 				statp->options |= RES_NO_NIBBLE2;
723 				statp->options &=
758 res_rndinit(res_state statp)
763 	u_char *rnd = statp->_rnd == NULL ? srnd : statp->_rnd;
777 res_nrandomid(res_state statp) {
781 	u_char *rnd = statp->_rnd == NULL ? srnd : statp->_rnd;
807 res_nclose(res_state statp) {
810 	if (statp->_vcsock >= 0) {
811 		(void) _close(statp->_vcsock);
812 		statp->_vcsock = -1;
813 		statp->_flags &= ~(RES_F_VC | RES_F_CONN);
815 	for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
816 		if (statp->_u._ext.nssocks[ns] != -1) {
817 			(void) _close(statp->_u._ext.nssocks[ns]);
818 			statp->_u._ext.nssocks[ns] = -1;
824 res_ndestroy(res_state statp) {
825 	res_nclose(statp);
826 	if (statp->_u._ext.ext != NULL) {
827 		free(statp->_u._ext.ext);
828 		statp->_u._ext.ext = NULL;
830 	if (statp->_rnd != NULL) {
831 		free(statp->_rnd);
832 		statp->_rnd = NULL;
834 	statp->options &= ~RES_INIT;
839 res_get_nibblesuffix(res_state statp) {
840 	if (statp->_u._ext.ext)
841 		return (statp->_u._ext.ext->nsuffix);
846 res_get_nibblesuffix2(res_state statp) {
847 	if (statp->_u._ext.ext)
848 		return (statp->_u._ext.ext->nsuffix2);
854 res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt) {
859 	res_nclose(statp);
862 	statp->_u._ext.nscount = 0;
869 			if (statp->_u._ext.ext)
870 				memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
872 			if (size <= sizeof(statp->nsaddr_list[nserv]))
873 				memcpy(&statp->nsaddr_list[nserv],
876 				statp->nsaddr_list[nserv].sin_family = 0;
883 			if (statp->_u._ext.ext)
884 				memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
886 			if (size <= sizeof(statp->nsaddr_list[nserv]))
887 				memcpy(&statp->nsaddr_list[nserv],
890 				statp->nsaddr_list[nserv].sin_family = 0;
900 	statp->nscount = nserv;
905 res_getservers(res_state statp, union res_sockaddr_union *set, int cnt) {
910 	for (i = 0; i < statp->nscount && i < cnt; i++) {
911 		if (statp->_u._ext.ext)
912 			family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family;
914 			family = statp->nsaddr_list[i].sin_family;
919 			if (statp->_u._ext.ext)
921 				       &statp->_u._ext.ext->nsaddrs[i],
924 				memcpy(&set->sin, &statp->nsaddr_list[i],
931 			if (statp->_u._ext.ext)
933 				       &statp->_u._ext.ext->nsaddrs[i],
936 				memcpy(&set->sin6, &statp->nsaddr_list[i],
947 	return (statp->nscount);