2 * Copyright (C) 2004-2008 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 1.55.130.3 2008/07/23 23:31:17 marka 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
, ISC_FALSE
,
377 if (result
!= ISC_R_SUCCESS
) {
378 isc_log_write(ns_g_lctx
,
379 NS_LOGCATEGORY_GENERAL
,
382 "invalid name %s in searchlist",
387 result
= ns_lwsearchlist_append(lwresd
->search
, name
);
388 if (result
!= ISC_R_SUCCESS
) {
389 isc_log_write(ns_g_lctx
,
390 NS_LOGCATEGORY_GENERAL
,
393 "couldn't update searchlist");
399 lwresd
->magic
= LWRESD_MAGIC
;
402 return (ISC_R_SUCCESS
);
405 if (lwresd
->view
!= NULL
)
406 dns_view_detach(&lwresd
->view
);
407 if (lwresd
->search
!= NULL
)
408 ns_lwsearchlist_detach(&lwresd
->search
);
409 if (lwresd
->mctx
!= NULL
)
410 isc_mem_detach(&lwresd
->mctx
);
411 isc_mem_put(mctx
, lwresd
, sizeof(ns_lwresd_t
));
416 ns_lwdmanager_attach(ns_lwresd_t
*source
, ns_lwresd_t
**targetp
) {
417 INSIST(VALID_LWRESD(source
));
418 INSIST(targetp
!= NULL
&& *targetp
== NULL
);
422 UNLOCK(&source
->lock
);
428 ns_lwdmanager_detach(ns_lwresd_t
**lwresdp
) {
431 isc_boolean_t done
= ISC_FALSE
;
433 INSIST(lwresdp
!= NULL
&& *lwresdp
!= NULL
);
434 INSIST(VALID_LWRESD(*lwresdp
));
440 INSIST(lwresd
->refs
> 0);
442 if (lwresd
->refs
== 0)
444 UNLOCK(&lwresd
->lock
);
449 dns_view_detach(&lwresd
->view
);
450 if (lwresd
->search
!= NULL
)
451 ns_lwsearchlist_detach(&lwresd
->search
);
454 isc_mem_put(mctx
, lwresd
, sizeof(*lwresd
));
455 isc_mem_detach(&mctx
);
460 * Handle listener objects
463 ns_lwreslistener_attach(ns_lwreslistener_t
*source
,
464 ns_lwreslistener_t
**targetp
)
466 INSIST(VALID_LWRESLISTENER(source
));
467 INSIST(targetp
!= NULL
&& *targetp
== NULL
);
471 UNLOCK(&source
->lock
);
477 ns_lwreslistener_detach(ns_lwreslistener_t
**listenerp
) {
478 ns_lwreslistener_t
*listener
;
480 isc_boolean_t done
= ISC_FALSE
;
482 INSIST(listenerp
!= NULL
&& *listenerp
!= NULL
);
483 INSIST(VALID_LWRESLISTENER(*listenerp
));
485 listener
= *listenerp
;
487 LOCK(&listener
->lock
);
488 INSIST(listener
->refs
> 0);
490 if (listener
->refs
== 0)
492 UNLOCK(&listener
->lock
);
497 if (listener
->manager
!= NULL
)
498 ns_lwdmanager_detach(&listener
->manager
);
500 if (listener
->sock
!= NULL
)
501 isc_socket_detach(&listener
->sock
);
504 mctx
= listener
->mctx
;
505 isc_mem_put(mctx
, listener
, sizeof(*listener
));
506 isc_mem_detach(&mctx
);
511 listener_create(isc_mem_t
*mctx
, ns_lwresd_t
*lwresd
,
512 ns_lwreslistener_t
**listenerp
)
514 ns_lwreslistener_t
*listener
;
517 REQUIRE(listenerp
!= NULL
&& *listenerp
== NULL
);
519 listener
= isc_mem_get(mctx
, sizeof(ns_lwreslistener_t
));
520 if (listener
== NULL
)
521 return (ISC_R_NOMEMORY
);
523 result
= isc_mutex_init(&listener
->lock
);
524 if (result
!= ISC_R_SUCCESS
) {
525 isc_mem_put(mctx
, listener
, sizeof(ns_lwreslistener_t
));
529 listener
->magic
= LWRESLISTENER_MAGIC
;
532 listener
->sock
= NULL
;
534 listener
->manager
= NULL
;
535 ns_lwdmanager_attach(lwresd
, &listener
->manager
);
537 listener
->mctx
= NULL
;
538 isc_mem_attach(mctx
, &listener
->mctx
);
540 ISC_LINK_INIT(listener
, link
);
541 ISC_LIST_INIT(listener
->cmgrs
);
543 *listenerp
= listener
;
544 return (ISC_R_SUCCESS
);
548 listener_bind(ns_lwreslistener_t
*listener
, isc_sockaddr_t
*address
) {
549 isc_socket_t
*sock
= NULL
;
550 isc_result_t result
= ISC_R_SUCCESS
;
553 pf
= isc_sockaddr_pf(address
);
554 if ((pf
== AF_INET
&& isc_net_probeipv4() != ISC_R_SUCCESS
) ||
555 (pf
== AF_INET6
&& isc_net_probeipv6() != ISC_R_SUCCESS
))
556 return (ISC_R_FAMILYNOSUPPORT
);
558 listener
->address
= *address
;
560 if (isc_sockaddr_getport(&listener
->address
) == 0) {
562 port
= lwresd_g_listenport
;
564 port
= LWRES_UDP_PORT
;
565 isc_sockaddr_setport(&listener
->address
, port
);
569 result
= isc_socket_create(ns_g_socketmgr
, pf
,
570 isc_sockettype_udp
, &sock
);
571 if (result
!= ISC_R_SUCCESS
) {
572 isc_log_write(ns_g_lctx
, NS_LOGCATEGORY_GENERAL
,
573 NS_LOGMODULE_LWRESD
, ISC_LOG_WARNING
,
574 "failed to create lwres socket: %s",
575 isc_result_totext(result
));
579 result
= isc_socket_bind(sock
, &listener
->address
,
580 ISC_SOCKET_REUSEADDRESS
);
581 if (result
!= ISC_R_SUCCESS
) {
582 char socktext
[ISC_SOCKADDR_FORMATSIZE
];
583 isc_sockaddr_format(&listener
->address
, socktext
,
585 isc_socket_detach(&sock
);
586 isc_log_write(ns_g_lctx
, NS_LOGCATEGORY_GENERAL
,
587 NS_LOGMODULE_LWRESD
, ISC_LOG_WARNING
,
588 "failed to add lwres socket: %s: %s",
589 socktext
, isc_result_totext(result
));
592 listener
->sock
= sock
;
593 return (ISC_R_SUCCESS
);
597 listener_copysock(ns_lwreslistener_t
*oldlistener
,
598 ns_lwreslistener_t
*newlistener
)
600 newlistener
->address
= oldlistener
->address
;
601 isc_socket_attach(oldlistener
->sock
, &newlistener
->sock
);
605 listener_startclients(ns_lwreslistener_t
*listener
) {
606 ns_lwdclientmgr_t
*cm
;
611 * Create the client managers.
613 result
= ISC_R_SUCCESS
;
614 for (i
= 0; i
< NTASKS
&& result
== ISC_R_SUCCESS
; i
++)
615 result
= ns_lwdclientmgr_create(listener
, NRECVS
,
619 * Ensure that we have created at least one.
621 if (ISC_LIST_EMPTY(listener
->cmgrs
))
625 * Walk the list of clients and start each one up.
627 LOCK(&listener
->lock
);
628 cm
= ISC_LIST_HEAD(listener
->cmgrs
);
630 result
= ns_lwdclient_startrecv(cm
);
631 if (result
!= ISC_R_SUCCESS
)
632 isc_log_write(ns_g_lctx
, NS_LOGCATEGORY_GENERAL
,
633 NS_LOGMODULE_LWRESD
, ISC_LOG_ERROR
,
634 "could not start lwres "
635 "client handler: %s",
636 isc_result_totext(result
));
637 cm
= ISC_LIST_NEXT(cm
, link
);
639 UNLOCK(&listener
->lock
);
641 return (ISC_R_SUCCESS
);
645 listener_shutdown(ns_lwreslistener_t
*listener
) {
646 ns_lwdclientmgr_t
*cm
;
648 cm
= ISC_LIST_HEAD(listener
->cmgrs
);
650 isc_task_shutdown(cm
->task
);
651 cm
= ISC_LIST_NEXT(cm
, link
);
656 find_listener(isc_sockaddr_t
*address
, ns_lwreslistener_t
**listenerp
) {
657 ns_lwreslistener_t
*listener
;
659 INSIST(listenerp
!= NULL
&& *listenerp
== NULL
);
661 for (listener
= ISC_LIST_HEAD(listeners
);
663 listener
= ISC_LIST_NEXT(listener
, link
))
665 if (!isc_sockaddr_equal(address
, &listener
->address
))
667 *listenerp
= listener
;
668 return (ISC_R_SUCCESS
);
670 return (ISC_R_NOTFOUND
);
674 ns_lwreslistener_unlinkcm(ns_lwreslistener_t
*listener
, ns_lwdclientmgr_t
*cm
)
676 REQUIRE(VALID_LWRESLISTENER(listener
));
678 LOCK(&listener
->lock
);
679 ISC_LIST_UNLINK(listener
->cmgrs
, cm
, link
);
680 UNLOCK(&listener
->lock
);
684 ns_lwreslistener_linkcm(ns_lwreslistener_t
*listener
, ns_lwdclientmgr_t
*cm
) {
685 REQUIRE(VALID_LWRESLISTENER(listener
));
688 * This does no locking, since it's called early enough that locking
691 ISC_LIST_APPEND(listener
->cmgrs
, cm
, link
);
695 configure_listener(isc_sockaddr_t
*address
, ns_lwresd_t
*lwresd
,
696 isc_mem_t
*mctx
, ns_lwreslistenerlist_t
*newlisteners
)
698 ns_lwreslistener_t
*listener
, *oldlistener
= NULL
;
699 char socktext
[ISC_SOCKADDR_FORMATSIZE
];
702 (void)find_listener(address
, &oldlistener
);
704 result
= listener_create(mctx
, lwresd
, &listener
);
705 if (result
!= ISC_R_SUCCESS
) {
706 isc_sockaddr_format(address
, socktext
, sizeof(socktext
));
707 isc_log_write(ns_g_lctx
, ISC_LOGCATEGORY_GENERAL
,
708 NS_LOGMODULE_LWRESD
, ISC_LOG_WARNING
,
709 "lwres failed to configure %s: %s",
710 socktext
, isc_result_totext(result
));
715 * If there's already a listener, don't rebind the socket.
717 if (oldlistener
== NULL
) {
718 result
= listener_bind(listener
, address
);
719 if (result
!= ISC_R_SUCCESS
) {
720 ns_lwreslistener_detach(&listener
);
721 return (ISC_R_SUCCESS
);
724 listener_copysock(oldlistener
, listener
);
726 result
= listener_startclients(listener
);
727 if (result
!= ISC_R_SUCCESS
) {
728 isc_sockaddr_format(address
, socktext
, sizeof(socktext
));
729 isc_log_write(ns_g_lctx
, ISC_LOGCATEGORY_GENERAL
,
730 NS_LOGMODULE_LWRESD
, ISC_LOG_WARNING
,
731 "lwres: failed to start %s: %s", socktext
,
732 isc_result_totext(result
));
733 ns_lwreslistener_detach(&listener
);
734 return (ISC_R_SUCCESS
);
737 if (oldlistener
!= NULL
) {
739 * Remove the old listener from the old list and shut it down.
741 ISC_LIST_UNLINK(listeners
, oldlistener
, link
);
742 listener_shutdown(oldlistener
);
743 ns_lwreslistener_detach(&oldlistener
);
745 isc_sockaddr_format(address
, socktext
, sizeof(socktext
));
746 isc_log_write(ns_g_lctx
, ISC_LOGCATEGORY_GENERAL
,
747 NS_LOGMODULE_LWRESD
, ISC_LOG_NOTICE
,
748 "lwres listening on %s", socktext
);
751 ISC_LIST_APPEND(*newlisteners
, listener
, link
);
756 ns_lwresd_configure(isc_mem_t
*mctx
, const cfg_obj_t
*config
) {
757 const cfg_obj_t
*lwreslist
= NULL
;
758 const cfg_obj_t
*lwres
= NULL
;
759 const cfg_obj_t
*listenerslist
= NULL
;
760 const cfg_listelt_t
*element
= NULL
;
761 ns_lwreslistener_t
*listener
;
762 ns_lwreslistenerlist_t newlisteners
;
764 char socktext
[ISC_SOCKADDR_FORMATSIZE
];
765 isc_sockaddr_t
*addrs
= NULL
;
766 ns_lwresd_t
*lwresd
= NULL
;
767 isc_uint32_t count
= 0;
769 REQUIRE(mctx
!= NULL
);
770 REQUIRE(config
!= NULL
);
772 RUNTIME_CHECK(isc_once_do(&once
, initialize_mutex
) == ISC_R_SUCCESS
);
774 ISC_LIST_INIT(newlisteners
);
776 result
= cfg_map_get(config
, "lwres", &lwreslist
);
777 if (result
!= ISC_R_SUCCESS
)
778 return (ISC_R_SUCCESS
);
780 LOCK(&listeners_lock
);
782 * Run through the new lwres address list, noting sockets that
783 * are already being listened on and moving them to the new list.
785 * Identifying duplicates addr/port combinations is left to either
786 * the underlying config code, or to the bind attempt getting an
787 * address-in-use error.
789 for (element
= cfg_list_first(lwreslist
);
791 element
= cfg_list_next(element
))
795 lwres
= cfg_listelt_value(element
);
796 CHECK(ns_lwdmanager_create(mctx
, lwres
, &lwresd
));
798 port
= lwresd_g_listenport
;
800 port
= LWRES_UDP_PORT
;
802 listenerslist
= NULL
;
803 (void)cfg_map_get(lwres
, "listen-on", &listenerslist
);
804 if (listenerslist
== NULL
) {
805 struct in_addr localhost
;
806 isc_sockaddr_t address
;
808 localhost
.s_addr
= htonl(INADDR_LOOPBACK
);
809 isc_sockaddr_fromin(&address
, &localhost
, port
);
810 CHECK(configure_listener(&address
, lwresd
, mctx
,
815 CHECK(ns_config_getiplist(config
, listenerslist
,
816 port
, mctx
, &addrs
, &count
));
817 for (i
= 0; i
< count
; i
++)
818 CHECK(configure_listener(&addrs
[i
], lwresd
,
819 mctx
, &newlisteners
));
820 ns_config_putiplist(mctx
, &addrs
, count
);
822 ns_lwdmanager_detach(&lwresd
);
826 * Shutdown everything on the listeners list, and remove them from
827 * the list. Then put all of the new listeners on it.
830 while (!ISC_LIST_EMPTY(listeners
)) {
831 listener
= ISC_LIST_HEAD(listeners
);
832 ISC_LIST_UNLINK(listeners
, listener
, link
);
834 isc_sockaddr_format(&listener
->address
,
835 socktext
, sizeof(socktext
));
837 listener_shutdown(listener
);
838 ns_lwreslistener_detach(&listener
);
840 isc_log_write(ns_g_lctx
, ISC_LOGCATEGORY_GENERAL
,
841 NS_LOGMODULE_LWRESD
, ISC_LOG_NOTICE
,
842 "lwres no longer listening on %s", socktext
);
846 ISC_LIST_APPENDLIST(listeners
, newlisteners
, link
);
849 ns_config_putiplist(mctx
, &addrs
, count
);
852 ns_lwdmanager_detach(&lwresd
);
854 UNLOCK(&listeners_lock
);
860 ns_lwresd_shutdown(void) {
861 ns_lwreslistener_t
*listener
;
863 RUNTIME_CHECK(isc_once_do(&once
, initialize_mutex
) == ISC_R_SUCCESS
);
865 while (!ISC_LIST_EMPTY(listeners
)) {
866 listener
= ISC_LIST_HEAD(listeners
);
867 ISC_LIST_UNLINK(listeners
, listener
, link
);
868 ns_lwreslistener_detach(&listener
);