2 * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000-2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: lwresd.c,v 1.60 2009/09/02 23:48:01 tbox Exp $ */
22 * Main program for the Lightweight Resolver Daemon.
24 * To paraphrase the old saying about X11, "It's not a lightweight deamon
25 * for resolvers, it's a deamon for lightweight resolvers".
34 #include <isc/magic.h>
37 #include <isc/print.h>
38 #include <isc/socket.h>
42 #include <isccfg/namedconf.h>
45 #include <dns/result.h>
48 #include <named/config.h>
49 #include <named/globals.h>
50 #include <named/log.h>
51 #include <named/lwaddr.h>
52 #include <named/lwresd.h>
53 #include <named/lwdclient.h>
54 #include <named/lwsearch.h>
55 #include <named/server.h>
57 #define LWRESD_MAGIC ISC_MAGIC('L', 'W', 'R', 'D')
58 #define VALID_LWRESD(l) ISC_MAGIC_VALID(l, LWRESD_MAGIC)
60 #define LWRESLISTENER_MAGIC ISC_MAGIC('L', 'W', 'R', 'L')
61 #define VALID_LWRESLISTENER(l) ISC_MAGIC_VALID(l, LWRESLISTENER_MAGIC)
64 * The total number of clients we can handle will be NTASKS * NRECVS.
66 #define NTASKS 2 /*%< tasks to create to handle lwres queries */
67 #define NRECVS 2 /*%< max clients per task */
69 typedef ISC_LIST(ns_lwreslistener_t) ns_lwreslistenerlist_t;
71 static ns_lwreslistenerlist_t listeners;
72 static isc_mutex_t listeners_lock;
73 static isc_once_t once = ISC_ONCE_INIT;
77 initialize_mutex(void) {
78 RUNTIME_CHECK(isc_mutex_init(&listeners_lock) == ISC_R_SUCCESS);
83 * Wrappers around our memory management stuff, for the lwres functions.
86 ns__lwresd_memalloc(void *arg, size_t size) {
87 return (isc_mem_get(arg, size));
91 ns__lwresd_memfree(void *arg, void *mem, size_t size) {
92 isc_mem_put(arg, mem, size);
98 if (result != ISC_R_SUCCESS) goto cleanup; \
102 buffer_putstr(isc_buffer_t *b, const char *s) {
103 unsigned int len = strlen(s);
104 if (isc_buffer_availablelength(b) <= len)
105 return (ISC_R_NOSPACE);
106 isc_buffer_putmem(b, (const unsigned char *)s, len);
107 return (ISC_R_SUCCESS);
111 * Convert a resolv.conf file into a config structure.
114 ns_lwresd_parseeresolvconf(isc_mem_t *mctx, cfg_parser_t *pctx,
120 lwres_context_t *lwctx = NULL;
121 lwres_conf_t *lwc = NULL;
126 lwres_result_t lwresult;
129 lwresult = lwres_context_create(&lwctx, mctx, ns__lwresd_memalloc,
131 LWRES_CONTEXT_SERVERMODE);
132 if (lwresult != LWRES_R_SUCCESS) {
133 result = ISC_R_NOMEMORY;
137 lwresult = lwres_conf_parse(lwctx, lwresd_g_resolvconffile);
138 if (lwresult != LWRES_R_SUCCESS) {
139 result = DNS_R_SYNTAX;
143 lwc = lwres_conf_get(lwctx);
146 isc_buffer_init(&b, text, sizeof(text));
148 CHECK(buffer_putstr(&b, "options {\n"));
151 * Build the list of forwarders.
153 if (lwc->nsnext > 0) {
154 CHECK(buffer_putstr(&b, "\tforwarders {\n"));
156 for (i = 0; i < lwc->nsnext; i++) {
157 CHECK(lwaddr_sockaddr_fromlwresaddr(
159 &lwc->nameservers[i],
161 isc_netaddr_fromsockaddr(&na, &sa);
162 CHECK(buffer_putstr(&b, "\t\t"));
163 CHECK(isc_netaddr_totext(&na, &b));
164 CHECK(buffer_putstr(&b, ";\n"));
166 CHECK(buffer_putstr(&b, "\t};\n"));
172 if (lwc->sortlistnxt > 0) {
173 CHECK(buffer_putstr(&b, "\tsortlist {\n"));
174 CHECK(buffer_putstr(&b, "\t\t{\n"));
175 CHECK(buffer_putstr(&b, "\t\t\tany;\n"));
176 CHECK(buffer_putstr(&b, "\t\t\t{\n"));
177 for (i = 0; i < lwc->sortlistnxt; i++) {
178 lwres_addr_t *lwaddr = &lwc->sortlist[i].addr;
179 lwres_addr_t *lwmask = &lwc->sortlist[i].mask;
182 CHECK(lwaddr_sockaddr_fromlwresaddr(&sa, lwmask, 0));
183 isc_netaddr_fromsockaddr(&na, &sa);
184 result = isc_netaddr_masktoprefixlen(&na, &mask);
185 if (result != ISC_R_SUCCESS) {
186 char addrtext[ISC_NETADDR_FORMATSIZE];
187 isc_netaddr_format(&na, addrtext,
189 isc_log_write(ns_g_lctx,
190 NS_LOGCATEGORY_GENERAL,
193 "processing sortlist: '%s' is "
194 "not a valid netmask",
199 CHECK(lwaddr_sockaddr_fromlwresaddr(&sa, lwaddr, 0));
200 isc_netaddr_fromsockaddr(&na, &sa);
202 CHECK(buffer_putstr(&b, "\t\t\t\t"));
203 CHECK(isc_netaddr_totext(&na, &b));
204 snprintf(str, sizeof(str), "%u", mask);
205 CHECK(buffer_putstr(&b, "/"));
206 CHECK(buffer_putstr(&b, str));
207 CHECK(buffer_putstr(&b, ";\n"));
209 CHECK(buffer_putstr(&b, "\t\t\t};\n"));
210 CHECK(buffer_putstr(&b, "\t\t};\n"));
211 CHECK(buffer_putstr(&b, "\t};\n"));
214 CHECK(buffer_putstr(&b, "};\n\n"));
216 CHECK(buffer_putstr(&b, "lwres {\n"));
219 * Build the search path
221 if (lwc->searchnxt > 0) {
222 if (lwc->searchnxt > 0) {
223 CHECK(buffer_putstr(&b, "\tsearch {\n"));
224 for (i = 0; i < lwc->searchnxt; i++) {
225 CHECK(buffer_putstr(&b, "\t\t\""));
226 CHECK(buffer_putstr(&b, lwc->search[i]));
227 CHECK(buffer_putstr(&b, "\";\n"));
229 CHECK(buffer_putstr(&b, "\t};\n"));
234 * Build the ndots line
236 if (lwc->ndots != 1) {
237 CHECK(buffer_putstr(&b, "\tndots "));
238 snprintf(str, sizeof(str), "%u", lwc->ndots);
239 CHECK(buffer_putstr(&b, str));
240 CHECK(buffer_putstr(&b, ";\n"));
244 * Build the listen-on line
246 if (lwc->lwnext > 0) {
247 CHECK(buffer_putstr(&b, "\tlisten-on {\n"));
249 for (i = 0; i < lwc->lwnext; i++) {
250 CHECK(lwaddr_sockaddr_fromlwresaddr(&sa,
253 isc_netaddr_fromsockaddr(&na, &sa);
254 CHECK(buffer_putstr(&b, "\t\t"));
255 CHECK(isc_netaddr_totext(&na, &b));
256 CHECK(buffer_putstr(&b, ";\n"));
258 CHECK(buffer_putstr(&b, "\t};\n"));
261 CHECK(buffer_putstr(&b, "};\n"));
265 (int)isc_buffer_usedlength(&b),
266 (char *)isc_buffer_base(&b));
269 lwres_conf_clear(lwctx);
270 lwres_context_destroy(&lwctx);
272 return (cfg_parse_buffer(pctx, &b, &cfg_type_namedconf, configp));
277 lwres_conf_clear(lwctx);
278 lwres_context_destroy(&lwctx);
286 * Handle lwresd manager objects
289 ns_lwdmanager_create(isc_mem_t *mctx, const cfg_obj_t *lwres,
290 ns_lwresd_t **lwresdp)
294 dns_rdataclass_t vclass;
295 const cfg_obj_t *obj, *viewobj, *searchobj;
296 const cfg_listelt_t *element;
299 INSIST(lwresdp != NULL && *lwresdp == NULL);
301 lwresd = isc_mem_get(mctx, sizeof(ns_lwresd_t));
303 return (ISC_R_NOMEMORY);
306 isc_mem_attach(mctx, &lwresd->mctx);
308 lwresd->search = NULL;
312 (void)cfg_map_get(lwres, "ndots", &obj);
314 lwresd->ndots = cfg_obj_asuint32(obj);
318 RUNTIME_CHECK(isc_mutex_init(&lwresd->lock) == ISC_R_SUCCESS);
320 lwresd->shutting_down = ISC_FALSE;
323 (void)cfg_map_get(lwres, "view", &viewobj);
324 if (viewobj != NULL) {
325 vname = cfg_obj_asstring(cfg_tuple_get(viewobj, "name"));
326 obj = cfg_tuple_get(viewobj, "class");
327 result = ns_config_getclass(obj, dns_rdataclass_in, &vclass);
328 if (result != ISC_R_SUCCESS)
332 vclass = dns_rdataclass_in;
335 result = dns_viewlist_find(&ns_g_server->viewlist, vname, vclass,
337 if (result != ISC_R_SUCCESS) {
338 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
339 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
340 "couldn't find view %s", vname);
345 (void)cfg_map_get(lwres, "search", &searchobj);
346 if (searchobj != NULL) {
347 lwresd->search = NULL;
348 result = ns_lwsearchlist_create(lwresd->mctx,
350 if (result != ISC_R_SUCCESS) {
351 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
352 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
353 "couldn't create searchlist");
356 for (element = cfg_list_first(searchobj);
358 element = cfg_list_next(element))
360 const cfg_obj_t *search;
361 const char *searchstr;
362 isc_buffer_t namebuf;
363 dns_fixedname_t fname;
366 search = cfg_listelt_value(element);
367 searchstr = cfg_obj_asstring(search);
369 dns_fixedname_init(&fname);
370 name = dns_fixedname_name(&fname);
371 isc_buffer_init(&namebuf, searchstr,
373 isc_buffer_add(&namebuf, strlen(searchstr));
374 result = dns_name_fromtext(name, &namebuf,
375 dns_rootname, 0, NULL);
376 if (result != ISC_R_SUCCESS) {
377 isc_log_write(ns_g_lctx,
378 NS_LOGCATEGORY_GENERAL,
381 "invalid name %s in searchlist",
386 result = ns_lwsearchlist_append(lwresd->search, name);
387 if (result != ISC_R_SUCCESS) {
388 isc_log_write(ns_g_lctx,
389 NS_LOGCATEGORY_GENERAL,
392 "couldn't update searchlist");
398 lwresd->magic = LWRESD_MAGIC;
401 return (ISC_R_SUCCESS);
404 if (lwresd->view != NULL)
405 dns_view_detach(&lwresd->view);
406 if (lwresd->search != NULL)
407 ns_lwsearchlist_detach(&lwresd->search);
408 if (lwresd->mctx != NULL)
409 isc_mem_detach(&lwresd->mctx);
410 isc_mem_put(mctx, lwresd, sizeof(ns_lwresd_t));
415 ns_lwdmanager_attach(ns_lwresd_t *source, ns_lwresd_t **targetp) {
416 INSIST(VALID_LWRESD(source));
417 INSIST(targetp != NULL && *targetp == NULL);
421 UNLOCK(&source->lock);
427 ns_lwdmanager_detach(ns_lwresd_t **lwresdp) {
430 isc_boolean_t done = ISC_FALSE;
432 INSIST(lwresdp != NULL && *lwresdp != NULL);
433 INSIST(VALID_LWRESD(*lwresdp));
439 INSIST(lwresd->refs > 0);
441 if (lwresd->refs == 0)
443 UNLOCK(&lwresd->lock);
448 dns_view_detach(&lwresd->view);
449 if (lwresd->search != NULL)
450 ns_lwsearchlist_detach(&lwresd->search);
453 isc_mem_put(mctx, lwresd, sizeof(*lwresd));
454 isc_mem_detach(&mctx);
459 * Handle listener objects
462 ns_lwreslistener_attach(ns_lwreslistener_t *source,
463 ns_lwreslistener_t **targetp)
465 INSIST(VALID_LWRESLISTENER(source));
466 INSIST(targetp != NULL && *targetp == NULL);
470 UNLOCK(&source->lock);
476 ns_lwreslistener_detach(ns_lwreslistener_t **listenerp) {
477 ns_lwreslistener_t *listener;
479 isc_boolean_t done = ISC_FALSE;
481 INSIST(listenerp != NULL && *listenerp != NULL);
482 INSIST(VALID_LWRESLISTENER(*listenerp));
484 listener = *listenerp;
486 LOCK(&listener->lock);
487 INSIST(listener->refs > 0);
489 if (listener->refs == 0)
491 UNLOCK(&listener->lock);
496 if (listener->manager != NULL)
497 ns_lwdmanager_detach(&listener->manager);
499 if (listener->sock != NULL)
500 isc_socket_detach(&listener->sock);
503 mctx = listener->mctx;
504 isc_mem_put(mctx, listener, sizeof(*listener));
505 isc_mem_detach(&mctx);
510 listener_create(isc_mem_t *mctx, ns_lwresd_t *lwresd,
511 ns_lwreslistener_t **listenerp)
513 ns_lwreslistener_t *listener;
516 REQUIRE(listenerp != NULL && *listenerp == NULL);
518 listener = isc_mem_get(mctx, sizeof(ns_lwreslistener_t));
519 if (listener == NULL)
520 return (ISC_R_NOMEMORY);
522 result = isc_mutex_init(&listener->lock);
523 if (result != ISC_R_SUCCESS) {
524 isc_mem_put(mctx, listener, sizeof(ns_lwreslistener_t));
528 listener->magic = LWRESLISTENER_MAGIC;
531 listener->sock = NULL;
533 listener->manager = NULL;
534 ns_lwdmanager_attach(lwresd, &listener->manager);
536 listener->mctx = NULL;
537 isc_mem_attach(mctx, &listener->mctx);
539 ISC_LINK_INIT(listener, link);
540 ISC_LIST_INIT(listener->cmgrs);
542 *listenerp = listener;
543 return (ISC_R_SUCCESS);
547 listener_bind(ns_lwreslistener_t *listener, isc_sockaddr_t *address) {
548 isc_socket_t *sock = NULL;
549 isc_result_t result = ISC_R_SUCCESS;
552 pf = isc_sockaddr_pf(address);
553 if ((pf == AF_INET && isc_net_probeipv4() != ISC_R_SUCCESS) ||
554 (pf == AF_INET6 && isc_net_probeipv6() != ISC_R_SUCCESS))
555 return (ISC_R_FAMILYNOSUPPORT);
557 listener->address = *address;
559 if (isc_sockaddr_getport(&listener->address) == 0) {
561 port = lwresd_g_listenport;
563 port = LWRES_UDP_PORT;
564 isc_sockaddr_setport(&listener->address, port);
568 result = isc_socket_create(ns_g_socketmgr, pf,
569 isc_sockettype_udp, &sock);
570 if (result != ISC_R_SUCCESS) {
571 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
572 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
573 "failed to create lwres socket: %s",
574 isc_result_totext(result));
578 result = isc_socket_bind(sock, &listener->address,
579 ISC_SOCKET_REUSEADDRESS);
580 if (result != ISC_R_SUCCESS) {
581 char socktext[ISC_SOCKADDR_FORMATSIZE];
582 isc_sockaddr_format(&listener->address, socktext,
584 isc_socket_detach(&sock);
585 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
586 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
587 "failed to add lwres socket: %s: %s",
588 socktext, isc_result_totext(result));
591 listener->sock = sock;
592 return (ISC_R_SUCCESS);
596 listener_copysock(ns_lwreslistener_t *oldlistener,
597 ns_lwreslistener_t *newlistener)
599 newlistener->address = oldlistener->address;
600 isc_socket_attach(oldlistener->sock, &newlistener->sock);
604 listener_startclients(ns_lwreslistener_t *listener) {
605 ns_lwdclientmgr_t *cm;
610 * Create the client managers.
612 result = ISC_R_SUCCESS;
613 for (i = 0; i < NTASKS && result == ISC_R_SUCCESS; i++)
614 result = ns_lwdclientmgr_create(listener, NRECVS,
618 * Ensure that we have created at least one.
620 if (ISC_LIST_EMPTY(listener->cmgrs))
624 * Walk the list of clients and start each one up.
626 LOCK(&listener->lock);
627 cm = ISC_LIST_HEAD(listener->cmgrs);
629 result = ns_lwdclient_startrecv(cm);
630 if (result != ISC_R_SUCCESS)
631 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
632 NS_LOGMODULE_LWRESD, ISC_LOG_ERROR,
633 "could not start lwres "
634 "client handler: %s",
635 isc_result_totext(result));
636 cm = ISC_LIST_NEXT(cm, link);
638 UNLOCK(&listener->lock);
640 return (ISC_R_SUCCESS);
644 listener_shutdown(ns_lwreslistener_t *listener) {
645 ns_lwdclientmgr_t *cm;
647 cm = ISC_LIST_HEAD(listener->cmgrs);
649 isc_task_shutdown(cm->task);
650 cm = ISC_LIST_NEXT(cm, link);
655 find_listener(isc_sockaddr_t *address, ns_lwreslistener_t **listenerp) {
656 ns_lwreslistener_t *listener;
658 INSIST(listenerp != NULL && *listenerp == NULL);
660 for (listener = ISC_LIST_HEAD(listeners);
662 listener = ISC_LIST_NEXT(listener, link))
664 if (!isc_sockaddr_equal(address, &listener->address))
666 *listenerp = listener;
667 return (ISC_R_SUCCESS);
669 return (ISC_R_NOTFOUND);
673 ns_lwreslistener_unlinkcm(ns_lwreslistener_t *listener, ns_lwdclientmgr_t *cm)
675 REQUIRE(VALID_LWRESLISTENER(listener));
677 LOCK(&listener->lock);
678 ISC_LIST_UNLINK(listener->cmgrs, cm, link);
679 UNLOCK(&listener->lock);
683 ns_lwreslistener_linkcm(ns_lwreslistener_t *listener, ns_lwdclientmgr_t *cm) {
684 REQUIRE(VALID_LWRESLISTENER(listener));
687 * This does no locking, since it's called early enough that locking
690 ISC_LIST_APPEND(listener->cmgrs, cm, link);
694 configure_listener(isc_sockaddr_t *address, ns_lwresd_t *lwresd,
695 isc_mem_t *mctx, ns_lwreslistenerlist_t *newlisteners)
697 ns_lwreslistener_t *listener, *oldlistener = NULL;
698 char socktext[ISC_SOCKADDR_FORMATSIZE];
701 (void)find_listener(address, &oldlistener);
703 result = listener_create(mctx, lwresd, &listener);
704 if (result != ISC_R_SUCCESS) {
705 isc_sockaddr_format(address, socktext, sizeof(socktext));
706 isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
707 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
708 "lwres failed to configure %s: %s",
709 socktext, isc_result_totext(result));
714 * If there's already a listener, don't rebind the socket.
716 if (oldlistener == NULL) {
717 result = listener_bind(listener, address);
718 if (result != ISC_R_SUCCESS) {
719 ns_lwreslistener_detach(&listener);
720 return (ISC_R_SUCCESS);
723 listener_copysock(oldlistener, listener);
725 result = listener_startclients(listener);
726 if (result != ISC_R_SUCCESS) {
727 isc_sockaddr_format(address, socktext, sizeof(socktext));
728 isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
729 NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
730 "lwres: failed to start %s: %s", socktext,
731 isc_result_totext(result));
732 ns_lwreslistener_detach(&listener);
733 return (ISC_R_SUCCESS);
736 if (oldlistener != NULL) {
738 * Remove the old listener from the old list and shut it down.
740 ISC_LIST_UNLINK(listeners, oldlistener, link);
741 listener_shutdown(oldlistener);
742 ns_lwreslistener_detach(&oldlistener);
744 isc_sockaddr_format(address, socktext, sizeof(socktext));
745 isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
746 NS_LOGMODULE_LWRESD, ISC_LOG_NOTICE,
747 "lwres listening on %s", socktext);
750 ISC_LIST_APPEND(*newlisteners, listener, link);
755 ns_lwresd_configure(isc_mem_t *mctx, const cfg_obj_t *config) {
756 const cfg_obj_t *lwreslist = NULL;
757 const cfg_obj_t *lwres = NULL;
758 const cfg_obj_t *listenerslist = NULL;
759 const cfg_listelt_t *element = NULL;
760 ns_lwreslistener_t *listener;
761 ns_lwreslistenerlist_t newlisteners;
763 char socktext[ISC_SOCKADDR_FORMATSIZE];
764 isc_sockaddr_t *addrs = NULL;
765 ns_lwresd_t *lwresd = NULL;
766 isc_uint32_t count = 0;
768 REQUIRE(mctx != NULL);
769 REQUIRE(config != NULL);
771 RUNTIME_CHECK(isc_once_do(&once, initialize_mutex) == ISC_R_SUCCESS);
773 ISC_LIST_INIT(newlisteners);
775 result = cfg_map_get(config, "lwres", &lwreslist);
776 if (result != ISC_R_SUCCESS)
777 return (ISC_R_SUCCESS);
779 LOCK(&listeners_lock);
781 * Run through the new lwres address list, noting sockets that
782 * are already being listened on and moving them to the new list.
784 * Identifying duplicates addr/port combinations is left to either
785 * the underlying config code, or to the bind attempt getting an
786 * address-in-use error.
788 for (element = cfg_list_first(lwreslist);
790 element = cfg_list_next(element))
794 lwres = cfg_listelt_value(element);
795 CHECK(ns_lwdmanager_create(mctx, lwres, &lwresd));
797 port = lwresd_g_listenport;
799 port = LWRES_UDP_PORT;
801 listenerslist = NULL;
802 (void)cfg_map_get(lwres, "listen-on", &listenerslist);
803 if (listenerslist == NULL) {
804 struct in_addr localhost;
805 isc_sockaddr_t address;
807 localhost.s_addr = htonl(INADDR_LOOPBACK);
808 isc_sockaddr_fromin(&address, &localhost, port);
809 CHECK(configure_listener(&address, lwresd, mctx,
814 CHECK(ns_config_getiplist(config, listenerslist,
815 port, mctx, &addrs, &count));
816 for (i = 0; i < count; i++)
817 CHECK(configure_listener(&addrs[i], lwresd,
818 mctx, &newlisteners));
819 ns_config_putiplist(mctx, &addrs, count);
821 ns_lwdmanager_detach(&lwresd);
825 * Shutdown everything on the listeners list, and remove them from
826 * the list. Then put all of the new listeners on it.
829 while (!ISC_LIST_EMPTY(listeners)) {
830 listener = ISC_LIST_HEAD(listeners);
831 ISC_LIST_UNLINK(listeners, listener, link);
833 isc_sockaddr_format(&listener->address,
834 socktext, sizeof(socktext));
836 listener_shutdown(listener);
837 ns_lwreslistener_detach(&listener);
839 isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
840 NS_LOGMODULE_LWRESD, ISC_LOG_NOTICE,
841 "lwres no longer listening on %s", socktext);
845 ISC_LIST_APPENDLIST(listeners, newlisteners, link);
848 ns_config_putiplist(mctx, &addrs, count);
851 ns_lwdmanager_detach(&lwresd);
853 UNLOCK(&listeners_lock);
859 ns_lwresd_shutdown(void) {
860 ns_lwreslistener_t *listener;
862 RUNTIME_CHECK(isc_once_do(&once, initialize_mutex) == ISC_R_SUCCESS);
864 while (!ISC_LIST_EMPTY(listeners)) {
865 listener = ISC_LIST_HEAD(listeners);
866 ISC_LIST_UNLINK(listeners, listener, link);
867 ns_lwreslistener_detach(&listener);