netresolv/resolv/res_init.c

170 res_ninit(res_state statp) {
171 	return (__res_vinit(statp, 0));
176 __res_vinit(res_state statp, int preinit) {
193 	RES_SET_H_ERRNO(statp, 0);
195 	if ((statp->options & RES_INIT) != 0U)
196 		res_ndestroy(statp);
199 		statp->retrans = RES_TIMEOUT;
200 		statp->retry = RES_DFLRETRY;
201 		statp->options = RES_DEFAULT;
203 	res_rndinit(statp);
204 	statp->id = res_nrandomid(statp);
231 	statp->nscount = 0;
232 	statp->ndots = 1;
233 	statp->pfcode = 0;
234 	statp->_vcsock = -1;
235 	statp->_flags = 0;
236 	statp->qhook = NULL;
237 	statp->rhook = NULL;
238 	statp->_u._ext.nscount = 0;
239 	statp->_u._ext.ext = malloc(sizeof(*statp->_u._ext.ext));
240 	if (statp->_u._ext.ext != NULL) {
241 	        memset(statp->_u._ext.ext, 0, sizeof(*statp->_u._ext.ext));
242 		statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
243 		strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
244 		strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
258 		RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
262 	statp->nsort = 0;
264 	res_setservers(statp, u, nserv);
272 		char buf[sizeof(statp->defdname)], *cp;
281 			(void)strlcpy(statp->defdname, cp,
282 			    sizeof(statp->defdname));
289 		(void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
290 		statp->defdname[sizeof(statp->defdname) - 1] = '\0';
300 		cp = statp->defdname;
301 		pp = statp->dnsrch;
303 		for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
347 		    strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
348 		    statp->defdname[sizeof(statp->defdname) - 1] = '\0';
349 		    if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
363 		    strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
364 		    statp->defdname[sizeof(statp->defdname) - 1] = '\0';
365 		    if ((cp = strchr(statp->defdname, '\n')) != NULL)
371 		    cp = statp->defdname;
372 		    pp = statp->dnsrch;
374 		    for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
396 		        sizeof(statp->_u._ext.ext->nsaddrs[0]);
410 			    if (statp->_u._ext.ext != NULL) {
411 				memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
415 			        sizeof(statp->nsaddr_list[nserv])) {
416 				memcpy(&statp->nsaddr_list[nserv],
419 				statp->nsaddr_list[nserv].sin_family = 0;
443 			    statp->sort_list[nsort].addr = a;
454 				    statp->sort_list[nsort].mask = a.s_addr;
456 				    statp->sort_list[nsort].mask =
457 					net_mask(statp->sort_list[nsort].addr);
460 				statp->sort_list[nsort].mask =
461 				    net_mask(statp->sort_list[nsort].addr);
471 		    res_setoptions(statp, buf + sizeof("options") - 1, "conf");
476 		statp->nscount = nserv;
478 	    statp->nsort = nsort;
480 	    statp->_u._ext.ext->resfd = fcntl(fileno(fp), F_DUPFD_CLOEXEC, 0);
483 	    statp->_u._ext.ext->kq = -1;
484 	    statp->_u._ext.ext->resfd = -1;
492 		nserv = get_nameservers(statp);
495 	if (statp->defdname[0] == 0 &&
496 	    gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
498 		strcpy(statp->defdname, cp + 1);
502 		pp = statp->dnsrch;
503 		*pp++ = statp->defdname;
507 		for (cp = statp->defdname; *cp; cp++)
510 		cp = statp->defdname;
511 		while (pp < statp->dnsrch + MAXDFLSRCH) {
520 		if (statp->options & RES_DEBUG) {
522 			for (pp = statp->dnsrch; *pp; pp++)
530 		res_setoptions(statp, cp, "env");
531 	statp->options |= RES_INIT;
532 	return (statp->res_h_errno);
536 res_setoptions(res_state statp, const char *options, const char *source)
541 	struct __res_state_ext *ext = statp->_u._ext.ext;
544 	if (statp->options & RES_DEBUG)
556 				statp->ndots = i;
558 				statp->ndots = RES_MAXNDOTS;
560 			if (statp->options & RES_DEBUG)
561 				printf(";;\tndots=%d\n", statp->ndots);
566 				statp->retrans = i;
568 				statp->retrans = RES_MAXRETRANS;
570 			if (statp->options & RES_DEBUG)
571 				printf(";;\ttimeout=%d\n", statp->retrans);
580 			statp->retrans = atoi(cp + sizeof("retrans:") - 1);
587 			statp->retry = atoi(cp + sizeof("retry:") - 1);
592 				statp->retry = i;
594 				statp->retry = RES_MAXRETRY;
596 			if (statp->options & RES_DEBUG)
597 				printf(";;\tattempts=%d\n", statp->retry);
601 			if (!(statp->options & RES_DEBUG)) {
604 				statp->options |= RES_DEBUG;
612 			statp->options |= RES_NOTLDQUERY;
614 			statp->options |= RES_USE_INET6;
617 			statp->options |= RES_USE_INET4;
620 			statp->options |= RES_ROTATE;
623 			statp->options |= RES_NOCHECKNAME;
626 			statp->options &= ~RES_NOCHECKNAME;
630 			statp->options |= RES_USE_EDNS0;
634 			statp->options |= RES_USE_DNAME;
656 				statp->options |= RES_NO_NIBBLE2;
658 				statp->options &=
690 res_rndinit(res_state statp)
695 	u_char *rnd = statp->_rnd == NULL ? srnd : statp->_rnd;
709 res_nrandomid(res_state statp)
714 	u_char *rnd = statp->_rnd == NULL ? srnd : statp->_rnd;
740 res_nclose(res_state statp)
744 	if (statp->_vcsock >= 0) {
745 		(void) close(statp->_vcsock);
746 		statp->_vcsock = -1;
747 		statp->_flags &= ~(RES_F_VC | RES_F_CONN);
749 	for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
750 		if (statp->_u._ext.nssocks[ns] != -1) {
751 			(void) close(statp->_u._ext.nssocks[ns]);
752 			statp->_u._ext.nssocks[ns] = -1;
758 res_ndestroy(res_state statp)
760 	struct __res_state_ext *ext = statp->_u._ext.ext;
761 	res_nclose(statp);
768 		statp->_u._ext.ext = NULL;
770 	statp->options &= ~RES_INIT;
774 res_get_nibblesuffix(res_state statp)
776 	if (statp->_u._ext.ext)
777 		return (statp->_u._ext.ext->nsuffix);
782 res_get_nibblesuffix2(res_state statp)
784 	if (statp->_u._ext.ext)
785 		return (statp->_u._ext.ext->nsuffix2);
790 res_setservers(res_state statp, const union res_sockaddr_union *set, int cnt)
796 	res_nclose(statp);
799 	statp->_u._ext.nscount = 0;
806 			if (statp->_u._ext.ext)
807 				memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
809 			if (size <= sizeof(statp->nsaddr_list[nserv]))
810 				memcpy(&statp->nsaddr_list[nserv],
813 				statp->nsaddr_list[nserv].sin_family = 0;
820 			if (statp->_u._ext.ext)
821 				memcpy(&statp->_u._ext.ext->nsaddrs[nserv],
823 			if (size <= sizeof(statp->nsaddr_list[nserv]))
824 				memcpy(&statp->nsaddr_list[nserv],
827 				statp->nsaddr_list[nserv].sin_family = 0;
837 	statp->nscount = nserv;
842 res_getservers(res_state statp, union res_sockaddr_union *set, int cnt)
848 	for (i = 0; i < statp->nscount && i < cnt; i++) {
849 		if (statp->_u._ext.ext)
850 			family = statp->_u._ext.ext->nsaddrs[i].sin.sin_family;
852 			family = statp->nsaddr_list[i].sin_family;
857 			if (statp->_u._ext.ext)
859 				       &statp->_u._ext.ext->nsaddrs[i],
862 				memcpy(&set->sin, &statp->nsaddr_list[i],
869 			if (statp->_u._ext.ext)
871 				       &statp->_u._ext.ext->nsaddrs[i],
874 				memcpy(&set->sin6, &statp->nsaddr_list[i],
885 	return (statp->nscount);