2 This file is part of avahi.
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.
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.
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
31 #include <arpa/inet.h>
33 #include <sys/utsname.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
37 #include <avahi-common/domain.h>
38 #include <avahi-common/timeval.h>
39 #include <avahi-common/malloc.h>
40 #include <avahi-common/error.h>
41 #include <avahi-common/domain.h>
49 #include "dns-srv-rr.h"
51 #include "domain-util.h"
53 static void transport_flags_from_domain(AvahiServer *s, AvahiPublishFlags *flags, const char *domain) {
57 assert(!((*flags & AVAHI_PUBLISH_USE_MULTICAST) && (*flags & AVAHI_PUBLISH_USE_WIDE_AREA)));
59 if (*flags & (AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA))
62 if (!s->wide_area_lookup_engine ||
63 !avahi_wide_area_has_servers(s->wide_area_lookup_engine) ||
64 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_LOCAL) ||
65 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV4) ||
66 avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV6))
67 *flags |= AVAHI_PUBLISH_USE_MULTICAST;
69 *flags |= AVAHI_PUBLISH_USE_WIDE_AREA;
72 void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
78 avahi_goodbye_entry(s, e, 1, 1);
80 /* Remove from linked list */
81 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
83 /* Remove from hash table indexed by name */
84 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
85 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
87 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
89 avahi_hashmap_remove(s->entries_by_key, e->record->key);
91 /* Remove from associated group */
93 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
95 avahi_record_unref(e->record);
99 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
104 avahi_entry_free(s, g->entries);
106 if (g->register_time_event)
107 avahi_time_event_free(g->register_time_event);
109 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
113 void avahi_cleanup_dead_entries(AvahiServer *s) {
116 if (s->need_group_cleanup) {
117 AvahiSEntryGroup *g, *next;
119 for (g = s->groups; g; g = next) {
120 next = g->groups_next;
123 avahi_entry_group_free(s, g);
126 s->need_group_cleanup = 0;
129 if (s->need_entry_cleanup) {
130 AvahiEntry *e, *next;
132 for (e = s->entries; e; e = next) {
133 next = e->entries_next;
136 avahi_entry_free(s, e);
139 s->need_entry_cleanup = 0;
142 if (s->need_browser_cleanup)
143 avahi_browser_cleanup(s);
146 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
152 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
156 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
159 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
162 if (avahi_record_equal_no_ttl(r, e->record)) {
163 /* The records are the same, not a conflict in any case */
167 if ((interface <= 0 ||
169 e->interface == interface) &&
170 (protocol == AVAHI_PROTO_UNSPEC ||
171 e->protocol == AVAHI_PROTO_UNSPEC ||
172 e->protocol == protocol))
180 static AvahiEntry * server_add_internal(
183 AvahiIfIndex interface,
184 AvahiProtocol protocol,
185 AvahiPublishFlags flags,
193 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, s->state != AVAHI_SERVER_FAILURE && s->state != AVAHI_SERVER_INVALID, AVAHI_ERR_BAD_STATE);
194 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
195 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
196 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(
198 AVAHI_PUBLISH_NO_ANNOUNCE|
199 AVAHI_PUBLISH_NO_PROBE|
200 AVAHI_PUBLISH_UNIQUE|
201 AVAHI_PUBLISH_ALLOW_MULTIPLE|
202 AVAHI_PUBLISH_UPDATE|
203 AVAHI_PUBLISH_USE_WIDE_AREA|
204 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
205 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME);
206 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL);
207 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN);
208 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD);
209 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS);
210 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
211 (r->key->type != 0) &&
212 (r->key->type != AVAHI_DNS_TYPE_ANY) &&
213 (r->key->type != AVAHI_DNS_TYPE_OPT) &&
214 (r->key->type != AVAHI_DNS_TYPE_TKEY) &&
215 (r->key->type != AVAHI_DNS_TYPE_TSIG) &&
216 (r->key->type != AVAHI_DNS_TYPE_IXFR) &&
217 (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE);
219 transport_flags_from_domain(s, &flags, r->key->name);
220 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
221 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !s->config.disable_publishing, AVAHI_ERR_NOT_PERMITTED);
222 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
224 (g->state != AVAHI_ENTRY_GROUP_ESTABLISHED && g->state != AVAHI_ENTRY_GROUP_REGISTERING) ||
225 (flags & AVAHI_PUBLISH_UPDATE), AVAHI_ERR_BAD_STATE);
227 if (flags & AVAHI_PUBLISH_UPDATE) {
228 AvahiRecord *old_record;
231 /* Update and existing record */
233 /* Find the first matching entry */
234 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
235 if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
241 /* Hmm, nothing found? */
243 avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
247 /* Update the entry */
248 old_record = e->record;
249 e->record = avahi_record_ref(r);
252 /* Announce our changes when needed */
253 if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
255 /* Remove the old entry from all caches, if needed */
256 if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
257 avahi_goodbye_entry(s, e, 1, 0);
259 /* Reannounce our updated entry */
260 avahi_reannounce_entry(s, e);
263 /* If we were the first entry in the list, we need to update the key */
265 avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
267 avahi_record_unref(old_record);
272 /* Add a new record */
274 if (check_record_conflict(s, interface, protocol, r, flags) < 0) {
275 avahi_server_set_errno(s, AVAHI_ERR_COLLISION);
279 if (!(e = avahi_new(AvahiEntry, 1))) {
280 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
285 e->record = avahi_record_ref(r);
287 e->interface = interface;
288 e->protocol = protocol;
292 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
294 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
296 /* Insert into hash table indexed by name */
297 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
298 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
299 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
301 /* Insert into group list */
303 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
305 avahi_announce_entry(s, e);
311 int avahi_server_add(
314 AvahiIfIndex interface,
315 AvahiProtocol protocol,
316 AvahiPublishFlags flags,
319 if (!server_add_internal(s, g, interface, protocol, flags, r))
320 return avahi_server_errno(s);
325 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
326 AvahiEntry **e = (AvahiEntry**) state;
331 *e = g ? g->entries : s->entries;
333 while (*e && (*e)->dead)
334 *e = g ? (*e)->by_group_next : (*e)->entries_next;
339 return avahi_record_ref((*e)->record);
342 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
348 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
350 for (e = s->entries; e; e = e->entries_next) {
357 if (!(t = avahi_record_to_string(e->record)))
358 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
360 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
363 callback(ln, userdata);
366 avahi_dump_caches(s->monitor, callback, userdata);
368 if (s->wide_area_lookup_engine)
369 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
373 static AvahiEntry *server_add_ptr_internal(
376 AvahiIfIndex interface,
377 AvahiProtocol protocol,
378 AvahiPublishFlags flags,
389 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
390 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME);
393 name = s->host_name_fqdn;
395 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) {
396 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
400 r->data.ptr.name = avahi_normalize_name_strdup(dest);
401 e = server_add_internal(s, g, interface, protocol, flags, r);
402 avahi_record_unref(r);
406 int avahi_server_add_ptr(
409 AvahiIfIndex interface,
410 AvahiProtocol protocol,
411 AvahiPublishFlags flags,
420 if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest)))
421 return avahi_server_errno(s);
426 int avahi_server_add_address(
429 AvahiIfIndex interface,
430 AvahiProtocol protocol,
431 AvahiPublishFlags flags,
435 char n[AVAHI_DOMAIN_NAME_MAX];
437 AvahiEntry *entry = NULL, *reverse = NULL;
443 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
444 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL);
445 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags,
446 AVAHI_PUBLISH_NO_REVERSE|
447 AVAHI_PUBLISH_NO_ANNOUNCE|
448 AVAHI_PUBLISH_NO_PROBE|
449 AVAHI_PUBLISH_UPDATE|
450 AVAHI_PUBLISH_USE_WIDE_AREA|
451 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
452 AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
454 /* Prepare the host naem */
457 name = s->host_name_fqdn;
459 AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n)));
463 transport_flags_from_domain(s, &flags, name);
464 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
466 /* Create the A/AAAA record */
468 if (a->proto == AVAHI_PROTO_INET) {
470 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
471 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
475 r->data.a.address = a->data.ipv4;
478 assert(a->proto == AVAHI_PROTO_INET6);
480 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
481 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
485 r->data.aaaa.address = a->data.ipv6;
488 entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
489 avahi_record_unref(r);
492 ret = avahi_server_errno(s);
496 /* Create the reverse lookup entry */
498 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
499 char reverse_n[AVAHI_DOMAIN_NAME_MAX];
500 avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n));
502 if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) {
503 ret = avahi_server_errno(s);
510 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
512 avahi_entry_free(s, entry);
514 avahi_entry_free(s, reverse);
520 static AvahiEntry *server_add_txt_strlst_nocopy(
523 AvahiIfIndex interface,
524 AvahiProtocol protocol,
525 AvahiPublishFlags flags,
528 AvahiStringList *strlst) {
535 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
536 avahi_string_list_free(strlst);
537 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
541 r->data.txt.string_list = strlst;
542 e = server_add_internal(s, g, interface, protocol, flags, r);
543 avahi_record_unref(r);
548 static AvahiStringList *add_magic_cookie(
550 AvahiStringList *strlst) {
554 if (!s->config.add_service_cookie)
557 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
558 /* This string list already contains a magic cookie */
561 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
564 static int server_add_service_strlst_nocopy(
567 AvahiIfIndex interface,
568 AvahiProtocol protocol,
569 AvahiPublishFlags flags,
575 AvahiStringList *strlst) {
577 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
578 AvahiRecord *r = NULL;
580 AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL;
586 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
587 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
588 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
589 AVAHI_PUBLISH_NO_COOKIE|
590 AVAHI_PUBLISH_UPDATE|
591 AVAHI_PUBLISH_USE_WIDE_AREA|
592 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
593 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
594 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
595 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
596 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_fqdn(host), AVAHI_ERR_INVALID_HOST_NAME);
599 domain = s->domain_name;
602 host = s->host_name_fqdn;
604 transport_flags_from_domain(s, &flags, domain);
605 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
607 if (!(h = avahi_normalize_name_strdup(host))) {
608 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
612 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
613 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
614 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
615 avahi_server_set_errno(s, ret);
619 /* Add service enumeration PTR record */
621 if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) {
622 ret = avahi_server_errno(s);
628 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
629 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
633 r->data.srv.priority = 0;
634 r->data.srv.weight = 0;
635 r->data.srv.port = port;
636 r->data.srv.name = h;
638 srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
639 avahi_record_unref(r);
642 ret = avahi_server_errno(s);
648 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
649 strlst = add_magic_cookie(s, strlst);
651 txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
655 ret = avahi_server_errno(s);
659 /* Add service type enumeration record */
661 if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) {
662 ret = avahi_server_errno(s);
667 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
669 avahi_entry_free(s, srv_entry);
671 avahi_entry_free(s, txt_entry);
673 avahi_entry_free(s, ptr_entry);
675 avahi_entry_free(s, enum_entry);
678 avahi_string_list_free(strlst);
684 int avahi_server_add_service_strlst(
687 AvahiIfIndex interface,
688 AvahiProtocol protocol,
689 AvahiPublishFlags flags,
695 AvahiStringList *strlst) {
701 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
704 int avahi_server_add_service(
707 AvahiIfIndex interface,
708 AvahiProtocol protocol,
709 AvahiPublishFlags flags,
721 ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
727 static int server_update_service_txt_strlst_nocopy(
730 AvahiIfIndex interface,
731 AvahiProtocol protocol,
732 AvahiPublishFlags flags,
736 AvahiStringList *strlst) {
738 char svc_name[AVAHI_DOMAIN_NAME_MAX];
746 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
747 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
748 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
749 AVAHI_PUBLISH_NO_COOKIE|
750 AVAHI_PUBLISH_USE_WIDE_AREA|
751 AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
752 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
753 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
754 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
757 domain = s->domain_name;
759 transport_flags_from_domain(s, &flags, domain);
760 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
762 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
763 avahi_server_set_errno(s, ret);
768 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
769 strlst = add_magic_cookie(s, strlst);
771 e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
775 ret = avahi_server_errno(s);
779 avahi_string_list_free(strlst);
784 int avahi_server_update_service_txt_strlst(
787 AvahiIfIndex interface,
788 AvahiProtocol protocol,
789 AvahiPublishFlags flags,
793 AvahiStringList *strlst) {
795 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
798 /** Update the TXT record for a service with the NULL termonate list of strings */
799 int avahi_server_update_service_txt(
802 AvahiIfIndex interface,
803 AvahiProtocol protocol,
804 AvahiPublishFlags flags,
813 va_start(va, domain);
814 ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
820 int avahi_server_add_service_subtype(
823 AvahiIfIndex interface,
824 AvahiProtocol protocol,
825 AvahiPublishFlags flags,
829 const char *subtype) {
832 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
838 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
839 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
840 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);
841 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
842 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
843 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
844 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
847 domain = s->domain_name;
849 transport_flags_from_domain(s, &flags, domain);
850 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
852 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
853 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
854 avahi_server_set_errno(s, ret);
858 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
866 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
867 static const char hex[] = "0123456789abcdef";
869 const uint8_t *k = p;
871 while (sl > 1 && pl > 0) {
872 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
888 static AvahiEntry *server_add_dns_server_name(
891 AvahiIfIndex interface,
892 AvahiProtocol protocol,
893 AvahiPublishFlags flags,
895 AvahiDNSServerType type,
897 uint16_t port /** should be 53 */) {
900 char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n;
907 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_WIDE_AREA|AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
908 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
909 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT);
910 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
911 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
914 domain = s->domain_name;
916 transport_flags_from_domain(s, &flags, domain);
917 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
919 if (!(n = avahi_normalize_name_strdup(name))) {
920 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
924 AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d)));
926 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d);
928 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
929 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
934 r->data.srv.priority = 0;
935 r->data.srv.weight = 0;
936 r->data.srv.port = port;
937 r->data.srv.name = n;
938 e = server_add_internal(s, g, interface, protocol, 0, r);
939 avahi_record_unref(r);
944 int avahi_server_add_dns_server_address(
947 AvahiIfIndex interface,
948 AvahiProtocol protocol,
949 AvahiPublishFlags flags,
951 AvahiDNSServerType type,
952 const AvahiAddress *address,
953 uint16_t port /** should be 53 */) {
957 AvahiEntry *a_entry, *s_entry;
962 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
963 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL);
964 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
965 AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
966 AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT);
967 AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
970 domain = s->domain_name;
972 transport_flags_from_domain(s, &flags, domain);
973 AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
975 if (address->proto == AVAHI_PROTO_INET) {
976 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
977 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
978 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
979 r->data.a.address = address->data.ipv4;
981 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
982 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
983 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
984 r->data.aaaa.address = address->data.ipv6;
988 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
990 a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
991 avahi_record_unref(r);
994 return avahi_server_errno(s);
996 if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) {
997 if (!(flags & AVAHI_PUBLISH_UPDATE))
998 avahi_entry_free(s, a_entry);
999 return avahi_server_errno(s);
1005 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
1008 if (g->state == state)
1011 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
1013 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
1015 /* If the entry group was established for a time longer then
1016 * 5s, reset the establishment trial counter */
1018 if (avahi_age(&g->established_at) > 5000000)
1019 g->n_register_try = 0;
1020 } else if (g->state == AVAHI_ENTRY_GROUP_REGISTERING) {
1021 if (g->register_time_event) {
1022 avahi_time_event_free(g->register_time_event);
1023 g->register_time_event = NULL;
1027 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
1029 /* If the entry group is now established, remember the time
1032 gettimeofday(&g->established_at, NULL);
1037 g->callback(g->server, g, state, g->userdata);
1040 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
1041 AvahiSEntryGroup *g;
1045 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
1046 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1051 g->callback = callback;
1052 g->userdata = userdata;
1054 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
1056 g->n_register_try = 0;
1057 g->register_time_event = NULL;
1058 g->register_time.tv_sec = 0;
1059 g->register_time.tv_usec = 0;
1060 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
1062 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
1066 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
1072 for (e = g->entries; e; e = e->by_group_next) {
1074 avahi_goodbye_entry(g->server, e, 1, 1);
1079 if (g->register_time_event) {
1080 avahi_time_event_free(g->register_time_event);
1081 g->register_time_event = NULL;
1086 g->server->need_group_cleanup = 1;
1087 g->server->need_entry_cleanup = 1;
1089 avahi_cleanup_dead_entries(g->server);
1092 static void entry_group_commit_real(AvahiSEntryGroup *g) {
1095 gettimeofday(&g->register_time, NULL);
1097 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
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;
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) {
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);
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);
1154 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
1158 for (e = g->entries; e; e = e->by_group_next) {
1160 avahi_goodbye_entry(g->server, e, 1, 1);
1164 g->server->need_entry_cleanup = 1;
1168 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
1170 avahi_cleanup_dead_entries(g->server);
1173 int avahi_entry_is_commited(AvahiEntry *e) {
1178 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1179 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1182 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
1189 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
1192 g->userdata = userdata;
1195 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
1201 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
1205 /* Look for an entry that is not dead */
1206 for (e = g->entries; e; e = e->by_group_next)