1 /***
2 This file is part of avahi.
3
4 avahi is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 avahi is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12 Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with avahi; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 USA.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <stdlib.h>
25
26 #include <avahi-common/timeval.h>
27 #include "avahi-common/avahi-malloc.h"
28 #include <avahi-common/error.h>
29 #include <avahi-common/domain.h>
30 #include <avahi-common/rlist.h>
31 #include <avahi-common/address.h>
32
33 #include "browse.h"
34 #include "log.h"
35 #include "querier.h"
36 #include "domain-util.h"
37 #include "rr-util.h"
38
39 #define AVAHI_LOOKUPS_PER_BROWSER_MAX 15
40
41 struct AvahiSRBLookup {
42 AvahiSRecordBrowser *record_browser;
43
44 unsigned ref;
45
46 AvahiIfIndex interface;
47 AvahiProtocol protocol;
48 AvahiLookupFlags flags;
49
50 AvahiKey *key;
51
52 AvahiWideAreaLookup *wide_area;
53 AvahiMulticastLookup *multicast;
54
55 AvahiRList *cname_lookups;
56
57 AVAHI_LLIST_FIELDS(AvahiSRBLookup, lookups);
58 };
59
60 static void lookup_handle_cname(AvahiSRBLookup *l, AvahiIfIndex interface, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiRecord *r);
61 static void lookup_drop_cname(AvahiSRBLookup *l, AvahiIfIndex interface, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiRecord *r);
62
transport_flags_from_domain(AvahiServer * s,AvahiLookupFlags * flags,const char * domain)63 static void transport_flags_from_domain(AvahiServer *s, AvahiLookupFlags *flags, const char *domain) {
64 assert(flags);
65 assert(domain);
66
67 assert(!((*flags & AVAHI_LOOKUP_USE_MULTICAST) && (*flags & AVAHI_LOOKUP_USE_WIDE_AREA)));
68
69 if (*flags & (AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_USE_WIDE_AREA))
70 return;
71
72 if (!s->wide_area_lookup_engine ||
73 !avahi_wide_area_has_servers(s->wide_area_lookup_engine) ||
74 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_LOCAL) ||
75 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV4) ||
76 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV6))
77 *flags |= AVAHI_LOOKUP_USE_MULTICAST;
78 else
79 *flags |= AVAHI_LOOKUP_USE_WIDE_AREA;
80 }
81
lookup_new(AvahiSRecordBrowser * b,AvahiIfIndex interface,AvahiProtocol protocol,AvahiLookupFlags flags,AvahiKey * key)82 static AvahiSRBLookup* lookup_new(
83 AvahiSRecordBrowser *b,
84 AvahiIfIndex interface,
85 AvahiProtocol protocol,
86 AvahiLookupFlags flags,
87 AvahiKey *key) {
88
89 AvahiSRBLookup *l;
90
91 assert(b);
92 assert(AVAHI_IF_VALID(interface));
93 assert(AVAHI_PROTO_VALID(protocol));
94
95 if (b->n_lookups >= AVAHI_LOOKUPS_PER_BROWSER_MAX)
96 /* We don't like cyclic CNAMEs */
97 return NULL;
98
99 if (!(l = avahi_new(AvahiSRBLookup, 1)))
100 return NULL;
101
102 l->ref = 1;
103 l->record_browser = b;
104 l->interface = interface;
105 l->protocol = protocol;
106 l->key = avahi_key_ref(key);
107 l->wide_area = NULL;
108 l->multicast = NULL;
109 l->cname_lookups = NULL;
110 l->flags = flags;
111
112 transport_flags_from_domain(b->server, &l->flags, key->name);
113
114 AVAHI_LLIST_PREPEND(AvahiSRBLookup, lookups, b->lookups, l);
115
116 b->n_lookups ++;
117
118 return l;
119 }
120
lookup_unref(AvahiSRBLookup * l)121 static void lookup_unref(AvahiSRBLookup *l) {
122 assert(l);
123 assert(l->ref >= 1);
124
125 if (--l->ref >= 1)
126 return;
127
128 AVAHI_LLIST_REMOVE(AvahiSRBLookup, lookups, l->record_browser->lookups, l);
129 l->record_browser->n_lookups --;
130
131 if (l->wide_area) {
132 avahi_wide_area_lookup_free(l->wide_area);
133 l->wide_area = NULL;
134 }
135
136 if (l->multicast) {
137 avahi_multicast_lookup_free(l->multicast);
138 l->multicast = NULL;
139 }
140
141 while (l->cname_lookups) {
142 lookup_unref(l->cname_lookups->data);
143 l->cname_lookups = avahi_rlist_remove_by_link(l->cname_lookups, l->cname_lookups);
144 }
145
146 avahi_key_unref(l->key);
147 avahi_free(l);
148 }
149
lookup_ref(AvahiSRBLookup * l)150 static AvahiSRBLookup* lookup_ref(AvahiSRBLookup *l) {
151 assert(l);
152 assert(l->ref >= 1);
153
154 l->ref++;
155 return l;
156 }
157
lookup_find(AvahiSRecordBrowser * b,AvahiIfIndex interface,AvahiProtocol protocol,AvahiLookupFlags flags,AvahiKey * key)158 static AvahiSRBLookup *lookup_find(
159 AvahiSRecordBrowser *b,
160 AvahiIfIndex interface,
161 AvahiProtocol protocol,
162 AvahiLookupFlags flags,
163 AvahiKey *key) {
164
165 AvahiSRBLookup *l;
166
167 assert(b);
168
169 for (l = b->lookups; l; l = l->lookups_next) {
170
171 if ((l->interface == AVAHI_IF_UNSPEC || l->interface == interface) &&
172 (l->interface == AVAHI_PROTO_UNSPEC || l->protocol == protocol) &&
173 l->flags == flags &&
174 avahi_key_equal(l->key, key))
175
176 return l;
177 }
178
179 return NULL;
180 }
181
browser_cancel(AvahiSRecordBrowser * b)182 static void browser_cancel(AvahiSRecordBrowser *b) {
183 assert(b);
184
185 if (b->root_lookup) {
186 lookup_unref(b->root_lookup);
187 b->root_lookup = NULL;
188 }
189
190 if (b->defer_time_event) {
191 avahi_time_event_free(b->defer_time_event);
192 b->defer_time_event = NULL;
193 }
194 }
195
lookup_wide_area_callback(AvahiWideAreaLookupEngine * e,AvahiBrowserEvent event,AvahiLookupResultFlags flags,AvahiRecord * r,void * userdata)196 static void lookup_wide_area_callback(
197 AvahiWideAreaLookupEngine *e,
198 AvahiBrowserEvent event,
199 AvahiLookupResultFlags flags,
200 AvahiRecord *r,
201 void *userdata) {
202
203 AvahiSRBLookup *l = userdata;
204 AvahiSRecordBrowser *b;
205
206 assert(e);
207 assert(l);
208 assert(l->ref >= 1);
209
210 b = l->record_browser;
211
212 if (b->dead)
213 return;
214
215 lookup_ref(l);
216
217 switch (event) {
218 case AVAHI_BROWSER_NEW:
219 assert(r);
220
221 if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
222 r->key->type == AVAHI_DNS_TYPE_CNAME)
223 /* It's a CNAME record, so let's follow it. We only follow it on wide area DNS! */
224 lookup_handle_cname(l, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_WIDE_AREA, r);
225 else {
226 /* It's a normal record, so let's call the user callback */
227 assert(avahi_key_equal(r->key, l->key));
228
229 b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, r, flags, b->userdata);
230 }
231 break;
232
233 case AVAHI_BROWSER_REMOVE:
234 case AVAHI_BROWSER_CACHE_EXHAUSTED:
235 /* Not defined for wide area DNS */
236 abort();
237
238 case AVAHI_BROWSER_ALL_FOR_NOW:
239 case AVAHI_BROWSER_FAILURE:
240
241 b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, NULL, flags, b->userdata);
242 break;
243 }
244
245 lookup_unref(l);
246
247 }
248
lookup_multicast_callback(AvahiMulticastLookupEngine * e,AvahiIfIndex interface,AvahiProtocol protocol,AvahiBrowserEvent event,AvahiLookupResultFlags flags,AvahiRecord * r,void * userdata)249 static void lookup_multicast_callback(
250 AvahiMulticastLookupEngine *e,
251 AvahiIfIndex interface,
252 AvahiProtocol protocol,
253 AvahiBrowserEvent event,
254 AvahiLookupResultFlags flags,
255 AvahiRecord *r,
256 void *userdata) {
257
258 AvahiSRBLookup *l = userdata;
259 AvahiSRecordBrowser *b;
260
261 assert(e);
262 assert(l);
263
264 b = l->record_browser;
265
266 if (b->dead)
267 return;
268
269 lookup_ref(l);
270
271 switch (event) {
272 case AVAHI_BROWSER_NEW:
273 assert(r);
274
275 if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
276 r->key->type == AVAHI_DNS_TYPE_CNAME)
277 /* It's a CNAME record, so let's follow it. We allow browsing on both multicast and wide area. */
278 lookup_handle_cname(l, interface, protocol, b->flags, r);
279 else {
280 /* It's a normal record, so let's call the user callback */
281
282 if (avahi_server_is_record_local(b->server, interface, protocol, r))
283 flags |= AVAHI_LOOKUP_RESULT_LOCAL;
284
285 b->callback(b, interface, protocol, event, r, flags, b->userdata);
286 }
287 break;
288
289 case AVAHI_BROWSER_REMOVE:
290 assert(r);
291
292 if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
293 r->key->type == AVAHI_DNS_TYPE_CNAME)
294 /* It's a CNAME record, so let's drop that query! */
295 lookup_drop_cname(l, interface, protocol, 0, r);
296 else {
297 /* It's a normal record, so let's call the user callback */
298 assert(avahi_key_equal(b->key, l->key));
299
300 b->callback(b, interface, protocol, event, r, flags, b->userdata);
301 }
302 break;
303
304 case AVAHI_BROWSER_ALL_FOR_NOW:
305
306 b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, NULL, flags, b->userdata);
307 break;
308
309 case AVAHI_BROWSER_CACHE_EXHAUSTED:
310 case AVAHI_BROWSER_FAILURE:
311 /* Not defined for multicast DNS */
312 abort();
313
314 }
315
316 lookup_unref(l);
317 }
318
lookup_start(AvahiSRBLookup * l)319 static int lookup_start(AvahiSRBLookup *l) {
320 assert(l);
321
322 assert(!(l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) != !(l->flags & AVAHI_LOOKUP_USE_MULTICAST));
323 assert(!l->wide_area && !l->multicast);
324
325 if (l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) {
326
327 if (!(l->wide_area = avahi_wide_area_lookup_new(l->record_browser->server->wide_area_lookup_engine, l->key, lookup_wide_area_callback, l)))
328 return -1;
329
330 } else {
331 assert(l->flags & AVAHI_LOOKUP_USE_MULTICAST);
332
333 if (!(l->multicast = avahi_multicast_lookup_new(l->record_browser->server->multicast_lookup_engine, l->interface, l->protocol, l->key, lookup_multicast_callback, l)))
334 return -1;
335 }
336
337 return 0;
338 }
339
lookup_scan_cache(AvahiSRBLookup * l)340 static int lookup_scan_cache(AvahiSRBLookup *l) {
341 int n = 0;
342
343 assert(l);
344
345 assert(!(l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) != !(l->flags & AVAHI_LOOKUP_USE_MULTICAST));
346
347
348 if (l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) {
349 n = (int) avahi_wide_area_scan_cache(l->record_browser->server->wide_area_lookup_engine, l->key, lookup_wide_area_callback, l);
350
351 } else {
352 assert(l->flags & AVAHI_LOOKUP_USE_MULTICAST);
353 n = (int) avahi_multicast_lookup_engine_scan_cache(l->record_browser->server->multicast_lookup_engine, l->interface, l->protocol, l->key, lookup_multicast_callback, l);
354 }
355
356 return n;
357 }
358
lookup_add(AvahiSRecordBrowser * b,AvahiIfIndex interface,AvahiProtocol protocol,AvahiLookupFlags flags,AvahiKey * key)359 static AvahiSRBLookup* lookup_add(AvahiSRecordBrowser *b, AvahiIfIndex interface, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiKey *key) {
360 AvahiSRBLookup *l;
361
362 assert(b);
363 assert(!b->dead);
364
365 if ((l = lookup_find(b, interface, protocol, flags, key)))
366 return lookup_ref(l);
367
368 if (!(l = lookup_new(b, interface, protocol, flags, key)))
369 return NULL;
370
371 return l;
372 }
373
lookup_go(AvahiSRBLookup * l)374 static int lookup_go(AvahiSRBLookup *l) {
375 int n = 0;
376 assert(l);
377
378 if (l->record_browser->dead)
379 return 0;
380
381 lookup_ref(l);
382
383 /* Browse the cache for the root request */
384 n = lookup_scan_cache(l);
385
386 /* Start the lookup */
387 if (!l->record_browser->dead && l->ref > 1) {
388
389 if ((l->flags & AVAHI_LOOKUP_USE_MULTICAST) || n == 0)
390 /* We do no start a query if the cache contained entries and we're on wide area */
391
392 if (lookup_start(l) < 0)
393 n = -1;
394 }
395
396 lookup_unref(l);
397
398 return n;
399 }
400
lookup_handle_cname(AvahiSRBLookup * l,AvahiIfIndex interface,AvahiProtocol protocol,AvahiLookupFlags flags,AvahiRecord * r)401 static void lookup_handle_cname(AvahiSRBLookup *l, AvahiIfIndex interface, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiRecord *r) {
402 AvahiKey *k;
403 AvahiSRBLookup *n;
404
405 assert(l);
406 assert(r);
407
408 assert(r->key->clazz == AVAHI_DNS_CLASS_IN);
409 assert(r->key->type == AVAHI_DNS_TYPE_CNAME);
410
411 k = avahi_key_new(r->data.ptr.name, l->record_browser->key->clazz, l->record_browser->key->type);
412 n = lookup_add(l->record_browser, interface, protocol, flags, k);
413 avahi_key_unref(k);
414
415 if (!n) {
416 avahi_log_debug(__FILE__": Failed to create SRBLookup.");
417 return;
418 }
419
420 l->cname_lookups = avahi_rlist_prepend(l->cname_lookups, lookup_ref(n));
421
422 lookup_go(n);
423 lookup_unref(n);
424 }
425
lookup_drop_cname(AvahiSRBLookup * l,AvahiIfIndex interface,AvahiProtocol protocol,AvahiLookupFlags flags,AvahiRecord * r)426 static void lookup_drop_cname(AvahiSRBLookup *l, AvahiIfIndex interface, AvahiProtocol protocol, AvahiLookupFlags flags, AvahiRecord *r) {
427 AvahiKey *k;
428 AvahiSRBLookup *n = NULL;
429 AvahiRList *rl;
430
431 assert(r->key->clazz == AVAHI_DNS_CLASS_IN);
432 assert(r->key->type == AVAHI_DNS_TYPE_CNAME);
433
434 k = avahi_key_new(r->data.ptr.name, l->record_browser->key->clazz, l->record_browser->key->type);
435
436 for (rl = l->cname_lookups; rl; rl = rl->rlist_next) {
437 n = rl->data;
438
439 assert(n);
440
441 if ((n->interface == AVAHI_IF_UNSPEC || n->interface == interface) &&
442 (n->interface == AVAHI_PROTO_UNSPEC || n->protocol == protocol) &&
443 n->flags == flags &&
444 avahi_key_equal(n->key, k))
445 break;
446 }
447
448 avahi_key_unref(k);
449
450 if (rl) {
451 l->cname_lookups = avahi_rlist_remove_by_link(l->cname_lookups, rl);
452 lookup_unref(n);
453 }
454 }
455
defer_callback(AVAHI_GCC_UNUSED AvahiTimeEvent * e,void * userdata)456 static void defer_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void *userdata) {
457 AvahiSRecordBrowser *b = userdata;
458 int n;
459
460 assert(b);
461 assert(!b->dead);
462
463 /* Remove the defer timeout */
464 if (b->defer_time_event) {
465 avahi_time_event_free(b->defer_time_event);
466 b->defer_time_event = NULL;
467 }
468
469 /* Create initial query */
470 assert(!b->root_lookup);
471 b->root_lookup = lookup_add(b, b->interface, b->protocol, b->flags, b->key);
472 assert(b->root_lookup);
473
474 n = lookup_go(b->root_lookup);
475
476 if (b->dead)
477 return;
478
479 if (n < 0) {
480 /* sending of the initial query failed */
481
482 avahi_server_set_errno(b->server, AVAHI_ERR_FAILURE);
483
484 b->callback(
485 b, b->interface, b->protocol, AVAHI_BROWSER_FAILURE, NULL,
486 b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA : AVAHI_LOOKUP_RESULT_MULTICAST,
487 b->userdata);
488
489 browser_cancel(b);
490 return;
491 }
492
493 /* Tell the client that we're done with the cache */
494 b->callback(
495 b, b->interface, b->protocol, AVAHI_BROWSER_CACHE_EXHAUSTED, NULL,
496 b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA : AVAHI_LOOKUP_RESULT_MULTICAST,
497 b->userdata);
498
499 if (!b->dead && b->root_lookup && b->root_lookup->flags & AVAHI_LOOKUP_USE_WIDE_AREA && n > 0) {
500
501 /* If we do wide area lookups and the the cache contained
502 * entries, we assume that it is complete, and tell the user
503 * so by firing ALL_FOR_NOW. */
504
505 b->callback(b, b->interface, b->protocol, AVAHI_BROWSER_ALL_FOR_NOW, NULL, AVAHI_LOOKUP_RESULT_WIDE_AREA, b->userdata);
506 }
507 }
508
avahi_s_record_browser_restart(AvahiSRecordBrowser * b)509 void avahi_s_record_browser_restart(AvahiSRecordBrowser *b) {
510 assert(b);
511 assert(!b->dead);
512
513 browser_cancel(b);
514
515 /* Request a new iteration of the cache scanning */
516 if (!b->defer_time_event) {
517 b->defer_time_event = avahi_time_event_new(b->server->time_event_queue, NULL, defer_callback, b);
518 assert(b->defer_time_event);
519 }
520 }
521
avahi_s_record_browser_new(AvahiServer * server,AvahiIfIndex interface,AvahiProtocol protocol,AvahiKey * key,AvahiLookupFlags flags,AvahiSRecordBrowserCallback callback,void * userdata)522 AvahiSRecordBrowser *avahi_s_record_browser_new(
523 AvahiServer *server,
524 AvahiIfIndex interface,
525 AvahiProtocol protocol,
526 AvahiKey *key,
527 AvahiLookupFlags flags,
528 AvahiSRecordBrowserCallback callback,
529 void* userdata) {
530
531 AvahiSRecordBrowser *b;
532
533 assert(server);
534 assert(key);
535 assert(callback);
536
537 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
538 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
539 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !avahi_key_is_pattern(key), AVAHI_ERR_IS_PATTERN);
540 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_key_is_valid(key), AVAHI_ERR_INVALID_KEY);
541 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
542 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !(flags & AVAHI_LOOKUP_USE_WIDE_AREA) || !(flags & AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
543
544 if (!(b = avahi_new(AvahiSRecordBrowser, 1))) {
545 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
546 return NULL;
547 }
548
549 b->dead = 0;
550 b->server = server;
551 b->interface = interface;
552 b->protocol = protocol;
553 b->key = avahi_key_ref(key);
554 b->flags = flags;
555 b->callback = callback;
556 b->userdata = userdata;
557 b->n_lookups = 0;
558 AVAHI_LLIST_HEAD_INIT(AvahiSRBLookup, b->lookups);
559 b->root_lookup = NULL;
560
561 AVAHI_LLIST_PREPEND(AvahiSRecordBrowser, browser, server->record_browsers, b);
562
563 /* The currently cached entries are scanned a bit later, and than we will start querying, too */
564 b->defer_time_event = avahi_time_event_new(server->time_event_queue, NULL, defer_callback, b);
565 assert(b->defer_time_event);
566
567 return b;
568 }
569
avahi_s_record_browser_free(AvahiSRecordBrowser * b)570 void avahi_s_record_browser_free(AvahiSRecordBrowser *b) {
571 assert(b);
572 assert(!b->dead);
573
574 b->dead = 1;
575 b->server->need_browser_cleanup = 1;
576
577 browser_cancel(b);
578 }
579
avahi_s_record_browser_destroy(AvahiSRecordBrowser * b)580 void avahi_s_record_browser_destroy(AvahiSRecordBrowser *b) {
581 assert(b);
582
583 browser_cancel(b);
584
585 AVAHI_LLIST_REMOVE(AvahiSRecordBrowser, browser, b->server->record_browsers, b);
586
587 avahi_key_unref(b->key);
588
589 avahi_free(b);
590 }
591
avahi_browser_cleanup(AvahiServer * server)592 void avahi_browser_cleanup(AvahiServer *server) {
593 AvahiSRecordBrowser *b;
594 AvahiSRecordBrowser *n;
595
596 assert(server);
597
598 while (server->need_browser_cleanup) {
599 server->need_browser_cleanup = 0;
600
601 for (b = server->record_browsers; b; b = n) {
602 n = b->browser_next;
603
604 if (b->dead)
605 avahi_s_record_browser_destroy(b);
606 }
607 }
608
609 if (server->wide_area_lookup_engine)
610 avahi_wide_area_cleanup(server->wide_area_lookup_engine);
611 avahi_multicast_lookup_engine_cleanup(server->multicast_lookup_engine);
612 }
613
614