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
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>
51 #include "dns-srv-rr.h"
53 #include "domain-util.h"
55 static void transport_flags_from_domain(AvahiServer *s, AvahiPublishFlags *flags, const char *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))
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;
71 *flags |= AVAHI_PUBLISH_USE_WIDE_AREA;
74 void avahi_entry_free(AvahiServer*s, AvahiEntry *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);
89 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
91 avahi_hashmap_remove(s->entries_by_key, e->record->key);
93 /* Remove from associated group */
95 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
97 avahi_record_unref(e->record);
101 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
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);
115 void avahi_cleanup_dead_entries(AvahiServer *s) {
118 if (s->need_group_cleanup) {
119 AvahiSEntryGroup *g, *next;
121 for (g = s->groups; g; g = next) {
122 next = g->groups_next;
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;
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) {
154 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
158 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
161 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
164 if ((interface <= 0 ||
166 e->interface == interface) &&
167 (protocol == AVAHI_PROTO_UNSPEC ||
168 e->protocol == AVAHI_PROTO_UNSPEC ||
169 e->protocol == protocol))
177 static AvahiEntry * server_add_internal(
180 AvahiIfIndex interface,
181 AvahiProtocol protocol,
182 AvahiPublishFlags flags,
190 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
191 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
192 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(
194 AVAHI_PUBLISH_NO_ANNOUNCE|
195 AVAHI_PUBLISH_NO_PROBE|
196 AVAHI_PUBLISH_UNIQUE|
197 AVAHI_PUBLISH_ALLOW_MULTIPLE|
198 AVAHI_PUBLISH_UPDATE|
199 AVAHI_PUBLISH_USE_WIDE_AREA|
200 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
201 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME);
202 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL);
203 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN);
204 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD);
205 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS);
206 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
207 (r->key->type != 0) &&
208 (r->key->type != AVAHI_DNS_TYPE_ANY) &&
209 (r->key->type != AVAHI_DNS_TYPE_OPT) &&
210 (r->key->type != AVAHI_DNS_TYPE_TKEY) &&
211 (r->key->type != AVAHI_DNS_TYPE_TSIG) &&
212 (r->key->type != AVAHI_DNS_TYPE_IXFR) &&
213 (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE);
215 transport_flags_from_domain(s, &flags, r->key->name);
216 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
217 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !s->config.disable_publishing, AVAHI_ERR_NOT_PERMITTED);
219 if (flags & AVAHI_PUBLISH_UPDATE) {
220 AvahiRecord *old_record;
223 /* Update and existing record */
225 /* Find the first matching entry */
226 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
227 if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
233 /* Hmm, nothing found? */
235 avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
239 /* Update the entry */
240 old_record = e->record;
241 e->record = avahi_record_ref(r);
244 /* Announce our changes when needed */
245 if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
247 /* Remove the old entry from all caches, if needed */
248 if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
249 avahi_goodbye_entry(s, e, 1, 0);
251 /* Reannounce our updated entry */
252 avahi_reannounce_entry(s, e);
255 /* If we were the first entry in the list, we need to update the key */
257 avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
259 avahi_record_unref(old_record);
264 /* Add a new record */
266 if (check_record_conflict(s, interface, protocol, r, flags) < 0) {
267 avahi_server_set_errno(s, AVAHI_ERR_COLLISION);
271 if (!(e = avahi_new(AvahiEntry, 1))) {
272 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
277 e->record = avahi_record_ref(r);
279 e->interface = interface;
280 e->protocol = protocol;
284 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
286 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
288 /* Insert into hash table indexed by name */
289 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
290 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
291 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
293 /* Insert into group list */
295 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
297 avahi_announce_entry(s, e);
303 int avahi_server_add(
306 AvahiIfIndex interface,
307 AvahiProtocol protocol,
308 AvahiPublishFlags flags,
311 if (!server_add_internal(s, g, interface, protocol, flags, r))
312 return avahi_server_errno(s);
317 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
318 AvahiEntry **e = (AvahiEntry**) state;
323 *e = g ? g->entries : s->entries;
325 while (*e && (*e)->dead)
326 *e = g ? (*e)->by_group_next : (*e)->entries_next;
331 return avahi_record_ref((*e)->record);
334 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
340 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
342 for (e = s->entries; e; e = e->entries_next) {
349 if (!(t = avahi_record_to_string(e->record)))
350 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
352 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
355 callback(ln, userdata);
358 avahi_dump_caches(s->monitor, callback, userdata);
360 if (s->wide_area_lookup_engine)
361 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
365 static AvahiEntry *server_add_ptr_internal(
368 AvahiIfIndex interface,
369 AvahiProtocol protocol,
370 AvahiPublishFlags flags,
381 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
382 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME);
385 name = s->host_name_fqdn;
387 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) {
388 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
392 r->data.ptr.name = avahi_normalize_name_strdup(dest);
393 e = server_add_internal(s, g, interface, protocol, flags, r);
394 avahi_record_unref(r);
398 int avahi_server_add_ptr(
401 AvahiIfIndex interface,
402 AvahiProtocol protocol,
403 AvahiPublishFlags flags,
412 if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest)))
413 return avahi_server_errno(s);
418 int avahi_server_add_address(
421 AvahiIfIndex interface,
422 AvahiProtocol protocol,
423 AvahiPublishFlags flags,
427 char n[AVAHI_DOMAIN_NAME_MAX];
429 AvahiEntry *entry = NULL, *reverse = NULL;
435 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
436 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL);
437 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags,
438 AVAHI_PUBLISH_NO_REVERSE|
439 AVAHI_PUBLISH_NO_ANNOUNCE|
440 AVAHI_PUBLISH_NO_PROBE|
441 AVAHI_PUBLISH_UPDATE|
442 AVAHI_PUBLISH_USE_WIDE_AREA|
443 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
444 AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
446 /* Prepare the host naem */
449 name = s->host_name_fqdn;
451 AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n)));
455 transport_flags_from_domain(s, &flags, name);
456 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
458 /* Create the A/AAAA record */
460 if (a->proto == AVAHI_PROTO_INET) {
462 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
463 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
467 r->data.a.address = a->data.ipv4;
470 assert(a->proto == AVAHI_PROTO_INET6);
472 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
473 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
477 r->data.aaaa.address = a->data.ipv6;
480 entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
481 avahi_record_unref(r);
484 ret = avahi_server_errno(s);
488 /* Create the reverse lookup entry */
490 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
491 char reverse_n[AVAHI_DOMAIN_NAME_MAX];
492 avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n));
494 if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) {
495 ret = avahi_server_errno(s);
502 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
504 avahi_entry_free(s, entry);
506 avahi_entry_free(s, reverse);
512 static AvahiEntry *server_add_txt_strlst_nocopy(
515 AvahiIfIndex interface,
516 AvahiProtocol protocol,
517 AvahiPublishFlags flags,
520 AvahiStringList *strlst) {
527 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
528 avahi_string_list_free(strlst);
529 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
533 r->data.txt.string_list = strlst;
534 e = server_add_internal(s, g, interface, protocol, flags, r);
535 avahi_record_unref(r);
540 static AvahiStringList *add_magic_cookie(
542 AvahiStringList *strlst) {
546 if (!s->config.add_service_cookie)
549 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
550 /* This string list already contains a magic cookie */
553 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
556 static int server_add_service_strlst_nocopy(
559 AvahiIfIndex interface,
560 AvahiProtocol protocol,
561 AvahiPublishFlags flags,
567 AvahiStringList *strlst) {
569 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
570 AvahiRecord *r = NULL;
572 AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL;
578 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
579 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
580 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
581 AVAHI_PUBLISH_NO_COOKIE|
582 AVAHI_PUBLISH_UPDATE|
583 AVAHI_PUBLISH_USE_WIDE_AREA|
584 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
585 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
586 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
587 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
588 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME);
591 domain = s->domain_name;
594 host = s->host_name_fqdn;
596 transport_flags_from_domain(s, &flags, domain);
597 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
599 if (!(h = avahi_normalize_name_strdup(host))) {
600 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
604 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
605 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
606 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
607 avahi_server_set_errno(s, ret);
611 /* Add service enumeration PTR record */
613 if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) {
614 ret = avahi_server_errno(s);
620 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
621 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
625 r->data.srv.priority = 0;
626 r->data.srv.weight = 0;
627 r->data.srv.port = port;
628 r->data.srv.name = h;
630 srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
631 avahi_record_unref(r);
634 ret = avahi_server_errno(s);
640 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
641 strlst = add_magic_cookie(s, strlst);
643 txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
647 ret = avahi_server_errno(s);
651 /* Add service type enumeration record */
653 if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) {
654 ret = avahi_server_errno(s);
659 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
661 avahi_entry_free(s, srv_entry);
663 avahi_entry_free(s, txt_entry);
665 avahi_entry_free(s, ptr_entry);
667 avahi_entry_free(s, enum_entry);
670 avahi_string_list_free(strlst);
676 int avahi_server_add_service_strlst(
679 AvahiIfIndex interface,
680 AvahiProtocol protocol,
681 AvahiPublishFlags flags,
687 AvahiStringList *strlst) {
693 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
696 int avahi_server_add_service(
699 AvahiIfIndex interface,
700 AvahiProtocol protocol,
701 AvahiPublishFlags flags,
713 ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
719 static int server_update_service_txt_strlst_nocopy(
722 AvahiIfIndex interface,
723 AvahiProtocol protocol,
724 AvahiPublishFlags flags,
728 AvahiStringList *strlst) {
730 char svc_name[AVAHI_DOMAIN_NAME_MAX];
738 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
739 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
740 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
741 AVAHI_PUBLISH_NO_COOKIE|
742 AVAHI_PUBLISH_USE_WIDE_AREA|
743 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
744 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
745 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
746 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
749 domain = s->domain_name;
751 transport_flags_from_domain(s, &flags, domain);
752 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
754 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
755 avahi_server_set_errno(s, ret);
760 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
761 strlst = add_magic_cookie(s, strlst);
763 e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
767 ret = avahi_server_errno(s);
771 avahi_string_list_free(strlst);
776 int avahi_server_update_service_txt_strlst(
779 AvahiIfIndex interface,
780 AvahiProtocol protocol,
781 AvahiPublishFlags flags,
785 AvahiStringList *strlst) {
787 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
790 /** Update the TXT record for a service with the NULL termonate list of strings */
791 int avahi_server_update_service_txt(
794 AvahiIfIndex interface,
795 AvahiProtocol protocol,
796 AvahiPublishFlags flags,
805 va_start(va, domain);
806 ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
812 int avahi_server_add_service_subtype(
815 AvahiIfIndex interface,
816 AvahiProtocol protocol,
817 AvahiPublishFlags flags,
821 const char *subtype) {
824 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
830 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
831 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
832 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);
833 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
834 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
835 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
836 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
839 domain = s->domain_name;
841 transport_flags_from_domain(s, &flags, domain);
842 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
844 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
845 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
846 avahi_server_set_errno(s, ret);
850 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
858 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
859 static const char hex[] = "0123456789abcdef";
861 const uint8_t *k = p;
863 while (sl > 1 && pl > 0) {
864 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
880 static AvahiEntry *server_add_dns_server_name(
883 AvahiIfIndex interface,
884 AvahiProtocol protocol,
885 AvahiPublishFlags flags,
887 AvahiDNSServerType type,
889 uint16_t port /** should be 53 */) {
892 char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n;
899 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_WIDE_AREA|AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
900 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
901 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT);
902 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
903 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
906 domain = s->domain_name;
908 transport_flags_from_domain(s, &flags, domain);
909 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
911 if (!(n = avahi_normalize_name_strdup(name))) {
912 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
916 AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d)));
918 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d);
920 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
921 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
926 r->data.srv.priority = 0;
927 r->data.srv.weight = 0;
928 r->data.srv.port = port;
929 r->data.srv.name = n;
930 e = server_add_internal(s, g, interface, protocol, 0, r);
931 avahi_record_unref(r);
936 int avahi_server_add_dns_server_address(
939 AvahiIfIndex interface,
940 AvahiProtocol protocol,
941 AvahiPublishFlags flags,
943 AvahiDNSServerType type,
944 const AvahiAddress *address,
945 uint16_t port /** should be 53 */) {
949 AvahiEntry *a_entry, *s_entry;
954 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
955 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL);
956 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
957 AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
958 AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT);
959 AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
962 domain = s->domain_name;
964 transport_flags_from_domain(s, &flags, domain);
965 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
967 if (address->proto == AVAHI_PROTO_INET) {
968 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
969 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
970 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
971 r->data.a.address = address->data.ipv4;
973 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
974 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
975 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
976 r->data.aaaa.address = address->data.ipv6;
980 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
982 a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
983 avahi_record_unref(r);
986 return avahi_server_errno(s);
988 if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) {
989 if (!(flags & AVAHI_PUBLISH_UPDATE))
990 avahi_entry_free(s, a_entry);
991 return avahi_server_errno(s);
997 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
1000 if (g->state == state)
1003 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
1005 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
1007 /* If the entry group was established for a time longer then
1008 * 5s, reset the establishment trial counter */
1010 if (avahi_age(&g->established_at) > 5000000)
1011 g->n_register_try = 0;
1014 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
1016 /* If the entry group is now established, remember the time
1019 gettimeofday(&g->established_at, NULL);
1024 g->callback(g->server, g, state, g->userdata);
1027 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
1028 AvahiSEntryGroup *g;
1032 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
1033 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1038 g->callback = callback;
1039 g->userdata = userdata;
1041 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
1043 g->n_register_try = 0;
1044 g->register_time_event = NULL;
1045 g->register_time.tv_sec = 0;
1046 g->register_time.tv_usec = 0;
1047 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
1049 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
1053 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
1059 for (e = g->entries; e; e = e->by_group_next) {
1061 avahi_goodbye_entry(g->server, e, 1, 1);
1066 if (g->register_time_event) {
1067 avahi_time_event_free(g->register_time_event);
1068 g->register_time_event = NULL;
1073 g->server->need_group_cleanup = 1;
1074 g->server->need_entry_cleanup = 1;
1077 static void entry_group_commit_real(AvahiSEntryGroup *g) {
1080 gettimeofday(&g->register_time, NULL);
1082 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1085 avahi_announce_group(g->server, g);
1086 avahi_s_entry_group_check_probed(g, 0);
1090 static void entry_group_register_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) {
1091 AvahiSEntryGroup *g = userdata;
1094 /* avahi_log_debug("Holdoff passed, waking up and going on."); */
1096 avahi_time_event_free(g->register_time_event);
1097 g->register_time_event = NULL;
1099 /* Holdoff time passed, so let's start probing */
1100 entry_group_commit_real(g);
1103 int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
1109 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
1110 return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
1112 g->n_register_try++;
1114 avahi_timeval_add(&g->register_time,
1115 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
1116 AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
1117 AVAHI_RR_HOLDOFF_MSEC));
1119 gettimeofday(&now, NULL);
1121 if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
1122 /* Holdoff time passed, so let's start probing */
1123 /* avahi_log_debug("Holdoff passed, directly going on."); */
1125 entry_group_commit_real(g);
1127 /* avahi_log_debug("Holdoff not passed, sleeping."); */
1129 /* Holdoff time has not yet passed, so let's wait */
1130 assert(!g->register_time_event);
1131 g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
1133 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1139 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
1143 for (e = g->entries; e; e = e->by_group_next) {
1145 avahi_goodbye_entry(g->server, e, 1, 1);
1149 g->server->need_entry_cleanup = 1;
1151 if (g->register_time_event) {
1152 avahi_time_event_free(g->register_time_event);
1153 g->register_time_event = NULL;
1158 gettimeofday(&g->register_time, NULL);
1160 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
1163 int avahi_entry_is_commited(AvahiEntry *e) {
1168 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1169 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1172 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
1179 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
1182 g->userdata = userdata;
1185 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
1191 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
1195 /* Look for an entry that is not dead */
1196 for (e = g->entries; e; e = e->by_group_next)