Lines Matching defs:*
0 /* $Id$ */
4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19 USA.
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
26 #include <string.h>
27 #include <unistd.h>
28 #include <errno.h>
29 #include <stdio.h>
30 #include <assert.h>
31 #include <stdlib.h>
33 #include <arpa/inet.h>
35 #include <sys/utsname.h>
36 #include <sys/types.h>
37 #include <sys/socket.h>
39 #include <avahi-common/domain.h>
40 #include <avahi-common/timeval.h>
41 #include <avahi-common/malloc.h>
42 #include <avahi-common/error.h>
43 #include <avahi-common/domain.h>
45 #include "internal.h"
46 #include "iface.h"
47 #include "socket.h"
48 #include "browse.h"
49 #include "log.h"
50 #include "util.h"
51 #include "dns-srv-rr.h"
52 #include "rr-util.h"
53 #include "domain-util.h"
55 static void transport_flags_from_domain(AvahiServer *s, AvahiPublishFlags *flags, const char *domain) {
56 assert(flags);
57 assert(domain);
59 assert(!((*flags & AVAHI_PUBLISH_USE_MULTICAST) && (*flags & AVAHI_PUBLISH_USE_WIDE_AREA)));
61 if (*flags & (AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA))
62 return;
64 if (!s->wide_area_lookup_engine ||
65 !avahi_wide_area_has_servers(s->wide_area_lookup_engine) ||
66 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_LOCAL) ||
67 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV4) ||
68 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV6))
69 *flags |= AVAHI_PUBLISH_USE_MULTICAST;
70 else
71 *flags |= AVAHI_PUBLISH_USE_WIDE_AREA;
74 void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
75 AvahiEntry *t;
77 assert(s);
78 assert(e);
80 avahi_goodbye_entry(s, e, 1, 1);
82 /* Remove from linked list */
83 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
85 /* Remove from hash table indexed by name */
86 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
87 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
88 if (t)
89 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
90 else
91 avahi_hashmap_remove(s->entries_by_key, e->record->key);
93 /* Remove from associated group */
94 if (e->group)
95 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
97 avahi_record_unref(e->record);
98 avahi_free(e);
101 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
102 assert(s);
103 assert(g);
105 while (g->entries)
106 avahi_entry_free(s, g->entries);
108 if (g->register_time_event)
109 avahi_time_event_free(g->register_time_event);
111 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
112 avahi_free(g);
115 void avahi_cleanup_dead_entries(AvahiServer *s) {
116 assert(s);
118 if (s->need_group_cleanup) {
119 AvahiSEntryGroup *g, *next;
121 for (g = s->groups; g; g = next) {
122 next = g->groups_next;
124 if (g->dead)
125 avahi_entry_group_free(s, g);
128 s->need_group_cleanup = 0;
131 if (s->need_entry_cleanup) {
132 AvahiEntry *e, *next;
134 for (e = s->entries; e; e = next) {
135 next = e->entries_next;
137 if (e->dead)
138 avahi_entry_free(s, e);
141 s->need_entry_cleanup = 0;
144 if (s->need_browser_cleanup)
145 avahi_browser_cleanup(s);
148 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
149 AvahiEntry *e;
151 assert(s);
152 assert(r);
154 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
155 if (e->dead)
156 continue;
158 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
159 continue;
161 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
162 continue;
164 if (avahi_record_equal_no_ttl(r, e->record)) {
165 /* The records are the same, not a conflict in any case */
166 continue;
169 if ((interface <= 0 ||
170 e->interface <= 0 ||
171 e->interface == interface) &&
172 (protocol == AVAHI_PROTO_UNSPEC ||
173 e->protocol == AVAHI_PROTO_UNSPEC ||
174 e->protocol == protocol))
176 return -1;
179 return 0;
182 static AvahiEntry * server_add_internal(
183 AvahiServer *s,
184 AvahiSEntryGroup *g,
185 AvahiIfIndex interface,
186 AvahiProtocol protocol,
187 AvahiPublishFlags flags,
188 AvahiRecord *r) {
190 AvahiEntry *e;
192 assert(s);
193 assert(r);
195 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, s->state != AVAHI_SERVER_FAILURE && s->state != AVAHI_SERVER_INVALID, AVAHI_ERR_BAD_STATE);
196 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
197 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
198 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(
199 flags,
200 AVAHI_PUBLISH_NO_ANNOUNCE|
201 AVAHI_PUBLISH_NO_PROBE|
202 AVAHI_PUBLISH_UNIQUE|
203 AVAHI_PUBLISH_ALLOW_MULTIPLE|
204 AVAHI_PUBLISH_UPDATE|
205 AVAHI_PUBLISH_USE_WIDE_AREA|
206 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
207 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME);
208 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL);
209 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN);
210 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD);
211 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS);
212 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
213 (r->key->type != 0) &&
214 (r->key->type != AVAHI_DNS_TYPE_ANY) &&
215 (r->key->type != AVAHI_DNS_TYPE_OPT) &&
216 (r->key->type != AVAHI_DNS_TYPE_TKEY) &&
217 (r->key->type != AVAHI_DNS_TYPE_TSIG) &&
218 (r->key->type != AVAHI_DNS_TYPE_IXFR) &&
219 (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE);
221 transport_flags_from_domain(s, &flags, r->key->name);
222 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
223 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !s->config.disable_publishing, AVAHI_ERR_NOT_PERMITTED);
224 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
225 !g ||
226 (g->state != AVAHI_ENTRY_GROUP_ESTABLISHED && g->state != AVAHI_ENTRY_GROUP_REGISTERING) ||
227 (flags & AVAHI_PUBLISH_UPDATE), AVAHI_ERR_BAD_STATE);
229 if (flags & AVAHI_PUBLISH_UPDATE) {
230 AvahiRecord *old_record;
231 int is_first = 1;
233 /* Update and existing record */
235 /* Find the first matching entry */
236 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
237 if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
238 break;
240 is_first = 0;
243 /* Hmm, nothing found? */
244 if (!e) {
245 avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
246 return NULL;
249 /* Update the entry */
250 old_record = e->record;
251 e->record = avahi_record_ref(r);
252 e->flags = flags;
254 /* Announce our changes when needed */
255 if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
257 /* Remove the old entry from all caches, if needed */
258 if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
259 avahi_goodbye_entry(s, e, 1, 0);
261 /* Reannounce our updated entry */
262 avahi_reannounce_entry(s, e);
265 /* If we were the first entry in the list, we need to update the key */
266 if (is_first)
267 avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
269 avahi_record_unref(old_record);
271 } else {
272 AvahiEntry *t;
274 /* Add a new record */
276 if (check_record_conflict(s, interface, protocol, r, flags) < 0) {
277 avahi_server_set_errno(s, AVAHI_ERR_COLLISION);
278 return NULL;
281 if (!(e = avahi_new(AvahiEntry, 1))) {
282 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
283 return NULL;
286 e->server = s;
287 e->record = avahi_record_ref(r);
288 e->group = g;
289 e->interface = interface;
290 e->protocol = protocol;
291 e->flags = flags;
292 e->dead = 0;
294 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
296 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
298 /* Insert into hash table indexed by name */
299 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
300 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
301 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
303 /* Insert into group list */
304 if (g)
305 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
307 avahi_announce_entry(s, e);
310 return e;
313 int avahi_server_add(
314 AvahiServer *s,
315 AvahiSEntryGroup *g,
316 AvahiIfIndex interface,
317 AvahiProtocol protocol,
318 AvahiPublishFlags flags,
319 AvahiRecord *r) {
321 if (!server_add_internal(s, g, interface, protocol, flags, r))
322 return avahi_server_errno(s);
324 return AVAHI_OK;
327 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
328 AvahiEntry **e = (AvahiEntry**) state;
329 assert(s);
330 assert(e);
332 if (!*e)
333 *e = g ? g->entries : s->entries;
335 while (*e && (*e)->dead)
336 *e = g ? (*e)->by_group_next : (*e)->entries_next;
338 if (!*e)
339 return NULL;
341 return avahi_record_ref((*e)->record);
344 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
345 AvahiEntry *e;
347 assert(s);
348 assert(callback);
350 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
352 for (e = s->entries; e; e = e->entries_next) {
353 char *t;
354 char ln[256];
356 if (e->dead)
357 continue;
359 if (!(t = avahi_record_to_string(e->record)))
360 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
362 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
363 avahi_free(t);
365 callback(ln, userdata);
368 avahi_dump_caches(s->monitor, callback, userdata);
370 if (s->wide_area_lookup_engine)
371 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
372 return AVAHI_OK;
375 static AvahiEntry *server_add_ptr_internal(
376 AvahiServer *s,
377 AvahiSEntryGroup *g,
378 AvahiIfIndex interface,
379 AvahiProtocol protocol,
380 AvahiPublishFlags flags,
381 uint32_t ttl,
382 const char *name,
383 const char *dest) {
385 AvahiRecord *r;
386 AvahiEntry *e;
388 assert(s);
389 assert(dest);
391 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
392 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME);
394 if (!name)
395 name = s->host_name_fqdn;
397 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) {
398 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
399 return NULL;
402 r->data.ptr.name = avahi_normalize_name_strdup(dest);
403 e = server_add_internal(s, g, interface, protocol, flags, r);
404 avahi_record_unref(r);
405 return e;
408 int avahi_server_add_ptr(
409 AvahiServer *s,
410 AvahiSEntryGroup *g,
411 AvahiIfIndex interface,
412 AvahiProtocol protocol,
413 AvahiPublishFlags flags,
414 uint32_t ttl,
415 const char *name,
416 const char *dest) {
418 AvahiEntry *e;
420 assert(s);
422 if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest)))
423 return avahi_server_errno(s);
425 return AVAHI_OK;
428 int avahi_server_add_address(
429 AvahiServer *s,
430 AvahiSEntryGroup *g,
431 AvahiIfIndex interface,
432 AvahiProtocol protocol,
433 AvahiPublishFlags flags,
434 const char *name,
435 AvahiAddress *a) {
437 char n[AVAHI_DOMAIN_NAME_MAX];
438 int ret = AVAHI_OK;
439 AvahiEntry *entry = NULL, *reverse = NULL;
440 AvahiRecord *r;
442 assert(s);
443 assert(a);
445 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
446 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL);
447 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags,
448 AVAHI_PUBLISH_NO_REVERSE|
449 AVAHI_PUBLISH_NO_ANNOUNCE|
450 AVAHI_PUBLISH_NO_PROBE|
451 AVAHI_PUBLISH_UPDATE|
452 AVAHI_PUBLISH_USE_WIDE_AREA|
453 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
454 AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
456 /* Prepare the host naem */
458 if (!name)
459 name = s->host_name_fqdn;
460 else {
461 AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n)));
462 name = n;
465 transport_flags_from_domain(s, &flags, name);
466 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
468 /* Create the A/AAAA record */
470 if (a->proto == AVAHI_PROTO_INET) {
472 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
473 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
474 goto finish;
477 r->data.a.address = a->data.ipv4;
479 } else {
480 assert(a->proto == AVAHI_PROTO_INET6);
482 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
483 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
484 goto finish;
487 r->data.aaaa.address = a->data.ipv6;
490 entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
491 avahi_record_unref(r);
493 if (!entry) {
494 ret = avahi_server_errno(s);
495 goto finish;
498 /* Create the reverse lookup entry */
500 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
501 char reverse_n[AVAHI_DOMAIN_NAME_MAX];
502 avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n));
504 if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) {
505 ret = avahi_server_errno(s);
506 goto finish;
510 finish:
512 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
513 if (entry)
514 avahi_entry_free(s, entry);
515 if (reverse)
516 avahi_entry_free(s, reverse);
519 return ret;
522 static AvahiEntry *server_add_txt_strlst_nocopy(
523 AvahiServer *s,
524 AvahiSEntryGroup *g,
525 AvahiIfIndex interface,
526 AvahiProtocol protocol,
527 AvahiPublishFlags flags,
528 uint32_t ttl,
529 const char *name,
530 AvahiStringList *strlst) {
532 AvahiRecord *r;
533 AvahiEntry *e;
535 assert(s);
537 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
538 avahi_string_list_free(strlst);
539 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
540 return NULL;
543 r->data.txt.string_list = strlst;
544 e = server_add_internal(s, g, interface, protocol, flags, r);
545 avahi_record_unref(r);
547 return e;
550 static AvahiStringList *add_magic_cookie(
551 AvahiServer *s,
552 AvahiStringList *strlst) {
554 assert(s);
556 if (!s->config.add_service_cookie)
557 return strlst;
559 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
560 /* This string list already contains a magic cookie */
561 return strlst;
563 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
566 static int server_add_service_strlst_nocopy(
567 AvahiServer *s,
568 AvahiSEntryGroup *g,
569 AvahiIfIndex interface,
570 AvahiProtocol protocol,
571 AvahiPublishFlags flags,
572 const char *name,
573 const char *type,
574 const char *domain,
575 const char *host,
576 uint16_t port,
577 AvahiStringList *strlst) {
579 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
580 AvahiRecord *r = NULL;
581 int ret = AVAHI_OK;
582 AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL;
584 assert(s);
585 assert(type);
586 assert(name);
588 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
589 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
590 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
591 AVAHI_PUBLISH_NO_COOKIE|
592 AVAHI_PUBLISH_UPDATE|
593 AVAHI_PUBLISH_USE_WIDE_AREA|
594 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
595 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
596 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
597 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
598 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_fqdn(host), AVAHI_ERR_INVALID_HOST_NAME);
600 if (!domain)
601 domain = s->domain_name;
603 if (!host)
604 host = s->host_name_fqdn;
606 transport_flags_from_domain(s, &flags, domain);
607 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
609 if (!(h = avahi_normalize_name_strdup(host))) {
610 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
611 goto fail;
614 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
615 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
616 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
617 avahi_server_set_errno(s, ret);
618 goto fail;
621 /* Add service enumeration PTR record */
623 if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) {
624 ret = avahi_server_errno(s);
625 goto fail;
628 /* Add SRV record */
630 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
631 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
632 goto fail;
635 r->data.srv.priority = 0;
636 r->data.srv.weight = 0;
637 r->data.srv.port = port;
638 r->data.srv.name = h;
639 h = NULL;
640 srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
641 avahi_record_unref(r);
643 if (!srv_entry) {
644 ret = avahi_server_errno(s);
645 goto fail;
648 /* Add TXT record */
650 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
651 strlst = add_magic_cookie(s, strlst);
653 txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
654 strlst = NULL;
656 if (!txt_entry) {
657 ret = avahi_server_errno(s);
658 goto fail;
661 /* Add service type enumeration record */
663 if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) {
664 ret = avahi_server_errno(s);
665 goto fail;
668 fail:
669 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
670 if (srv_entry)
671 avahi_entry_free(s, srv_entry);
672 if (txt_entry)
673 avahi_entry_free(s, txt_entry);
674 if (ptr_entry)
675 avahi_entry_free(s, ptr_entry);
676 if (enum_entry)
677 avahi_entry_free(s, enum_entry);
680 avahi_string_list_free(strlst);
681 avahi_free(h);
683 return ret;
686 int avahi_server_add_service_strlst(
687 AvahiServer *s,
688 AvahiSEntryGroup *g,
689 AvahiIfIndex interface,
690 AvahiProtocol protocol,
691 AvahiPublishFlags flags,
692 const char *name,
693 const char *type,
694 const char *domain,
695 const char *host,
696 uint16_t port,
697 AvahiStringList *strlst) {
699 assert(s);
700 assert(type);
701 assert(name);
703 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
706 int avahi_server_add_service(
707 AvahiServer *s,
708 AvahiSEntryGroup *g,
709 AvahiIfIndex interface,
710 AvahiProtocol protocol,
711 AvahiPublishFlags flags,
712 const char *name,
713 const char *type,
714 const char *domain,
715 const char *host,
716 uint16_t port,
717 ... ){
719 va_list va;
720 int ret;
722 va_start(va, port);
723 ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
724 va_end(va);
726 return ret;
729 static int server_update_service_txt_strlst_nocopy(
730 AvahiServer *s,
731 AvahiSEntryGroup *g,
732 AvahiIfIndex interface,
733 AvahiProtocol protocol,
734 AvahiPublishFlags flags,
735 const char *name,
736 const char *type,
737 const char *domain,
738 AvahiStringList *strlst) {
740 char svc_name[AVAHI_DOMAIN_NAME_MAX];
741 int ret = AVAHI_OK;
742 AvahiEntry *e;
744 assert(s);
745 assert(type);
746 assert(name);
748 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
749 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
750 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
751 AVAHI_PUBLISH_NO_COOKIE|
752 AVAHI_PUBLISH_USE_WIDE_AREA|
753 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
754 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
755 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
756 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
758 if (!domain)
759 domain = s->domain_name;
761 transport_flags_from_domain(s, &flags, domain);
762 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
764 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
765 avahi_server_set_errno(s, ret);
766 goto fail;
769 /* Add TXT record */
770 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
771 strlst = add_magic_cookie(s, strlst);
773 e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
774 strlst = NULL;
776 if (!e)
777 ret = avahi_server_errno(s);
779 fail:
781 avahi_string_list_free(strlst);
783 return ret;
786 int avahi_server_update_service_txt_strlst(
787 AvahiServer *s,
788 AvahiSEntryGroup *g,
789 AvahiIfIndex interface,
790 AvahiProtocol protocol,
791 AvahiPublishFlags flags,
792 const char *name,
793 const char *type,
794 const char *domain,
795 AvahiStringList *strlst) {
797 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
800 /** Update the TXT record for a service with the NULL termonate list of strings */
801 int avahi_server_update_service_txt(
802 AvahiServer *s,
803 AvahiSEntryGroup *g,
804 AvahiIfIndex interface,
805 AvahiProtocol protocol,
806 AvahiPublishFlags flags,
807 const char *name,
808 const char *type,
809 const char *domain,
810 ...) {
812 va_list va;
813 int ret;
815 va_start(va, domain);
816 ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
817 va_end(va);
819 return ret;
822 int avahi_server_add_service_subtype(
823 AvahiServer *s,
824 AvahiSEntryGroup *g,
825 AvahiIfIndex interface,
826 AvahiProtocol protocol,
827 AvahiPublishFlags flags,
828 const char *name,
829 const char *type,
830 const char *domain,
831 const char *subtype) {
833 int ret = AVAHI_OK;
834 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
836 assert(name);
837 assert(type);
838 assert(subtype);
840 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
841 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
842 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
843 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
844 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
845 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
846 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
848 if (!domain)
849 domain = s->domain_name;
851 transport_flags_from_domain(s, &flags, domain);
852 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
854 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
855 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
856 avahi_server_set_errno(s, ret);
857 goto fail;
860 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
861 goto fail;
863 fail:
865 return ret;
868 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
869 static const char hex[] = "0123456789abcdef";
870 int b = 0;
871 const uint8_t *k = p;
873 while (sl > 1 && pl > 0) {
874 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
876 if (b) {
877 k++;
878 pl--;
881 b = !b;
883 sl--;
886 if (sl > 0)
887 *s = 0;
890 static AvahiEntry *server_add_dns_server_name(
891 AvahiServer *s,
892 AvahiSEntryGroup *g,
893 AvahiIfIndex interface,
894 AvahiProtocol protocol,
895 AvahiPublishFlags flags,
896 const char *domain,
897 AvahiDNSServerType type,
898 const char *name,
899 uint16_t port /** should be 53 */) {
901 AvahiEntry *e;
902 char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n;
904 AvahiRecord *r;
906 assert(s);
907 assert(name);
909 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_WIDE_AREA|AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
910 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
911 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT);
912 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
913 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
915 if (!domain)
916 domain = s->domain_name;
918 transport_flags_from_domain(s, &flags, domain);
919 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
921 if (!(n = avahi_normalize_name_strdup(name))) {
922 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
923 return NULL;
926 AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d)));
928 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d);
930 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
931 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
932 avahi_free(n);
933 return NULL;
936 r->data.srv.priority = 0;
937 r->data.srv.weight = 0;
938 r->data.srv.port = port;
939 r->data.srv.name = n;
940 e = server_add_internal(s, g, interface, protocol, 0, r);
941 avahi_record_unref(r);
943 return e;
946 int avahi_server_add_dns_server_address(
947 AvahiServer *s,
948 AvahiSEntryGroup *g,
949 AvahiIfIndex interface,
950 AvahiProtocol protocol,
951 AvahiPublishFlags flags,
952 const char *domain,
953 AvahiDNSServerType type,
954 const AvahiAddress *address,
955 uint16_t port /** should be 53 */) {
957 AvahiRecord *r;
958 char n[64], h[64];
959 AvahiEntry *a_entry, *s_entry;
961 assert(s);
962 assert(address);
964 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
965 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL);
966 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
967 AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
968 AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT);
969 AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
971 if (!domain)
972 domain = s->domain_name;
974 transport_flags_from_domain(s, &flags, domain);
975 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
977 if (address->proto == AVAHI_PROTO_INET) {
978 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
979 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
980 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
981 r->data.a.address = address->data.ipv4;
982 } else {
983 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
984 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
985 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
986 r->data.aaaa.address = address->data.ipv6;
989 if (!r)
990 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
992 a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
993 avahi_record_unref(r);
995 if (!a_entry)
996 return avahi_server_errno(s);
998 if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) {
999 if (!(flags & AVAHI_PUBLISH_UPDATE))
1000 avahi_entry_free(s, a_entry);
1001 return avahi_server_errno(s);
1004 return AVAHI_OK;
1007 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
1008 assert(g);
1010 if (g->state == state)
1011 return;
1013 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
1015 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
1017 /* If the entry group was established for a time longer then
1018 * 5s, reset the establishment trial counter */
1020 if (avahi_age(&g->established_at) > 5000000)
1021 g->n_register_try = 0;
1022 } else if (g->state == AVAHI_ENTRY_GROUP_REGISTERING) {
1023 if (g->register_time_event) {
1024 avahi_time_event_free(g->register_time_event);
1025 g->register_time_event = NULL;
1029 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
1031 /* If the entry group is now established, remember the time
1032 * this happened */
1034 gettimeofday(&g->established_at, NULL);
1036 g->state = state;
1038 if (g->callback)
1039 g->callback(g->server, g, state, g->userdata);
1042 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
1043 AvahiSEntryGroup *g;
1045 assert(s);
1047 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
1048 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1049 return NULL;
1052 g->server = s;
1053 g->callback = callback;
1054 g->userdata = userdata;
1055 g->dead = 0;
1056 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
1057 g->n_probing = 0;
1058 g->n_register_try = 0;
1059 g->register_time_event = NULL;
1060 g->register_time.tv_sec = 0;
1061 g->register_time.tv_usec = 0;
1062 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
1064 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
1065 return g;
1068 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
1069 AvahiEntry *e;
1071 assert(g);
1072 assert(g->server);
1074 for (e = g->entries; e; e = e->by_group_next) {
1075 if (!e->dead) {
1076 avahi_goodbye_entry(g->server, e, 1, 1);
1077 e->dead = 1;
1081 if (g->register_time_event) {
1082 avahi_time_event_free(g->register_time_event);
1083 g->register_time_event = NULL;
1086 g->dead = 1;
1088 g->server->need_group_cleanup = 1;
1089 g->server->need_entry_cleanup = 1;
1092 static void entry_group_commit_real(AvahiSEntryGroup *g) {
1093 assert(g);
1095 gettimeofday(&g->register_time, NULL);
1097 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1099 if (g->dead)
1100 return;
1102 avahi_announce_group(g->server, g);
1103 avahi_s_entry_group_check_probed(g, 0);
1106 static void entry_group_register_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) {
1107 AvahiSEntryGroup *g = userdata;
1108 assert(g);
1110 avahi_time_event_free(g->register_time_event);
1111 g->register_time_event = NULL;
1113 /* Holdoff time passed, so let's start probing */
1114 entry_group_commit_real(g);
1117 int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
1118 struct timeval now;
1120 assert(g);
1121 assert(!g->dead);
1123 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
1124 return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
1126 if (avahi_s_entry_group_is_empty(g))
1127 return avahi_server_set_errno(g->server, AVAHI_ERR_IS_EMPTY);
1129 g->n_register_try++;
1131 avahi_timeval_add(&g->register_time,
1132 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
1133 AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
1134 AVAHI_RR_HOLDOFF_MSEC));
1136 gettimeofday(&now, NULL);
1138 if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
1140 /* Holdoff time passed, so let's start probing */
1141 entry_group_commit_real(g);
1142 } else {
1144 /* Holdoff time has not yet passed, so let's wait */
1145 assert(!g->register_time_event);
1146 g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
1148 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1151 return AVAHI_OK;
1154 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
1155 AvahiEntry *e;
1156 assert(g);
1158 for (e = g->entries; e; e = e->by_group_next) {
1159 if (!e->dead) {
1160 avahi_goodbye_entry(g->server, e, 1, 1);
1161 e->dead = 1;
1164 g->server->need_entry_cleanup = 1;
1166 g->n_probing = 0;
1168 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
1171 int avahi_entry_is_commited(AvahiEntry *e) {
1172 assert(e);
1173 assert(!e->dead);
1175 return !e->group ||
1176 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1177 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1180 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
1181 assert(g);
1182 assert(!g->dead);
1184 return g->state;
1187 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
1188 assert(g);
1190 g->userdata = userdata;
1193 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
1194 assert(g);
1196 return g->userdata;
1199 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
1200 AvahiEntry *e;
1201 assert(g);
1203 /* Look for an entry that is not dead */
1204 for (e = g->entries; e; e = e->by_group_next)
1205 if (!e->dead)
1206 return 0;
1208 return 1;