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
26 #include <sys/socket.h>
27 #include <arpa/inet.h>
29 #include <sys/utsname.h>
36 #include <avahi-common/domain.h>
37 #include <avahi-common/timeval.h>
38 #include <avahi-common/malloc.h>
39 #include <avahi-common/error.h>
48 void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
54 avahi_goodbye_entry(s, e, 1, 1);
56 /* Remove from linked list */
57 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
59 /* Remove from hash table indexed by name */
60 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
61 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
63 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
65 avahi_hashmap_remove(s->entries_by_key, e->record->key);
67 /* Remove from associated group */
69 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
71 avahi_record_unref(e->record);
75 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
80 avahi_entry_free(s, g->entries);
82 if (g->register_time_event)
83 avahi_time_event_free(g->register_time_event);
85 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
89 void avahi_cleanup_dead_entries(AvahiServer *s) {
92 if (s->need_group_cleanup) {
93 AvahiSEntryGroup *g, *next;
95 for (g = s->groups; g; g = next) {
96 next = g->groups_next;
99 avahi_entry_group_free(s, g);
102 s->need_group_cleanup = 0;
105 if (s->need_entry_cleanup) {
106 AvahiEntry *e, *next;
108 for (e = s->entries; e; e = next) {
109 next = e->entries_next;
112 avahi_entry_free(s, e);
115 s->need_entry_cleanup = 0;
118 if (s->need_browser_cleanup)
119 avahi_browser_cleanup(s);
122 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
128 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
132 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
135 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
138 if ((interface <= 0 ||
140 e->interface == interface) &&
141 (protocol == AVAHI_PROTO_UNSPEC ||
142 e->protocol == AVAHI_PROTO_UNSPEC ||
143 e->protocol == protocol))
151 int avahi_server_add(
154 AvahiIfIndex interface,
155 AvahiProtocol protocol,
156 AvahiPublishFlags flags,
162 if (!AVAHI_IF_VALID(interface))
163 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
165 if (!AVAHI_PROTO_VALID(protocol))
166 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
168 if (!AVAHI_FLAGS_VALID(
170 AVAHI_PUBLISH_NO_ANNOUNCE|
171 AVAHI_PUBLISH_NO_PROBE|
172 AVAHI_PUBLISH_UNIQUE|
173 AVAHI_PUBLISH_ALLOW_MULTIPLE|
174 AVAHI_PUBLISH_IS_PROXY|
175 AVAHI_PUBLISH_UPDATE))
176 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
178 if (!avahi_is_valid_domain_name(r->key->name))
179 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
182 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_TTL);
184 if (avahi_key_is_pattern(r->key))
185 return avahi_server_set_errno(s, AVAHI_ERR_IS_PATTERN);
187 if (!avahi_record_is_valid(r))
188 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_RECORD);
190 if (flags & AVAHI_PUBLISH_UPDATE) {
192 AvahiRecord *old_record;
195 /* Update and existing record */
197 /* Find the first matching entry */
198 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
199 if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
205 /* Hmm, nothing found? */
207 return avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
209 /* Update the entry */
210 old_record = e->record;
211 e->record = avahi_record_ref(r);
214 /* Announce our changes when needed */
215 if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
217 /* Remove the old entry from all caches, if needed */
218 if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
219 avahi_goodbye_entry(s, e, 1, 0);
221 /* Reannounce our updated entry */
222 avahi_reannounce_entry(s, e);
225 /* If we were the first entry in the list, we need to update the key */
227 avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
229 avahi_record_unref(old_record);
234 /* Add a new record */
236 if (check_record_conflict(s, interface, protocol, r, flags) < 0)
237 return avahi_server_set_errno(s, AVAHI_ERR_LOCAL_COLLISION);
239 if (!(e = avahi_new(AvahiEntry, 1)))
240 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
243 e->record = avahi_record_ref(r);
245 e->interface = interface;
246 e->protocol = protocol;
250 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
252 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
254 /* Insert into hash table indexed by name */
255 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
256 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
257 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
259 /* Insert into group list */
261 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
263 avahi_announce_entry(s, e);
269 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
270 AvahiEntry **e = (AvahiEntry**) state;
275 *e = g ? g->entries : s->entries;
277 while (*e && (*e)->dead)
278 *e = g ? (*e)->by_group_next : (*e)->entries_next;
283 return avahi_record_ref((*e)->record);
286 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
292 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
294 for (e = s->entries; e; e = e->entries_next) {
301 if (!(t = avahi_record_to_string(e->record)))
302 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
304 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
307 callback(ln, userdata);
310 avahi_dump_caches(s->monitor, callback, userdata);
312 if (s->wide_area_lookup_engine)
313 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
317 int avahi_server_add_ptr(
320 AvahiIfIndex interface,
321 AvahiProtocol protocol,
322 AvahiPublishFlags flags,
333 if ((name && !avahi_is_valid_domain_name(name)) || !avahi_is_valid_domain_name(dest))
334 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
337 name = s->host_name_fqdn;
339 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl)))
340 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
342 r->data.ptr.name = avahi_normalize_name_strdup(dest);
343 ret = avahi_server_add(s, g, interface, protocol, flags, r);
344 avahi_record_unref(r);
348 int avahi_server_add_address(
351 AvahiIfIndex interface,
352 AvahiProtocol protocol,
353 AvahiPublishFlags flags,
363 if (!AVAHI_IF_VALID(interface))
364 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
366 if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(a->proto))
367 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
369 if (!AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_REVERSE|AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_UPDATE))
370 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
372 if (name && !avahi_is_valid_domain_name(name))
373 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
376 name = s->host_name_fqdn;
378 if (!(n = avahi_normalize_name_strdup(name)))
379 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
384 if (a->proto == AVAHI_PROTO_INET) {
387 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
388 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
392 r->data.a.address = a->data.ipv4;
393 ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
394 avahi_record_unref(r);
399 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
402 if (!(reverse = avahi_reverse_lookup_name_ipv4(&a->data.ipv4))) {
403 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
407 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
414 assert(a->proto == AVAHI_PROTO_INET6);
416 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
417 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
421 r->data.aaaa.address = a->data.ipv6;
422 ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
423 avahi_record_unref(r);
428 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
431 if (!(reverse = avahi_reverse_lookup_name_ipv6_arpa(&a->data.ipv6))) {
432 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
436 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
442 if (!(reverse = avahi_reverse_lookup_name_ipv6_int(&a->data.ipv6))) {
443 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
447 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
459 static int server_add_txt_strlst_nocopy(
462 AvahiIfIndex interface,
463 AvahiProtocol protocol,
464 AvahiPublishFlags flags,
467 AvahiStringList *strlst) {
474 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
475 avahi_string_list_free(strlst);
476 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
479 r->data.txt.string_list = strlst;
480 ret = avahi_server_add(s, g, interface, protocol, flags, r);
481 avahi_record_unref(r);
486 int avahi_server_add_txt_strlst(
489 AvahiIfIndex interface,
490 AvahiProtocol protocol,
491 AvahiPublishFlags flags,
494 AvahiStringList *strlst) {
498 return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_copy(strlst));
501 int avahi_server_add_txt_va(
504 AvahiIfIndex interface,
505 AvahiProtocol protocol,
506 AvahiPublishFlags flags,
513 return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_new_va(va));
516 int avahi_server_add_txt(
519 AvahiIfIndex interface,
520 AvahiProtocol protocol,
521 AvahiPublishFlags flags,
532 ret = avahi_server_add_txt_va(s, g, interface, protocol, flags, ttl, name, va);
538 static AvahiStringList *add_magic_cookie(
540 AvahiStringList *strlst) {
544 if (!s->config.add_service_cookie)
547 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
548 /* This string list already contains a magic cookie */
551 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
554 static int server_add_service_strlst_nocopy(
557 AvahiIfIndex interface,
558 AvahiProtocol protocol,
559 AvahiPublishFlags flags,
565 AvahiStringList *strlst) {
567 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
568 AvahiRecord *r = NULL;
575 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
576 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
577 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS);
578 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
579 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
580 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
581 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME);
584 domain = s->domain_name;
587 host = s->host_name_fqdn;
589 if (!(h = avahi_normalize_name_strdup(host))) {
590 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
594 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
595 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
596 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
597 avahi_server_set_errno(s, ret);
601 /* Add service enumeration PTR record */
603 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
608 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
609 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
613 r->data.srv.priority = 0;
614 r->data.srv.weight = 0;
615 r->data.srv.port = port;
616 r->data.srv.name = h;
618 ret = avahi_server_add(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, r);
619 avahi_record_unref(r);
626 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
627 strlst = add_magic_cookie(s, strlst);
629 ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
635 /* Add service type enumeration record */
637 ret = avahi_server_add_ptr(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY), AVAHI_DEFAULT_TTL, enum_ptr, ptr_name);
641 avahi_string_list_free(strlst);
647 int avahi_server_add_service_strlst(
650 AvahiIfIndex interface,
651 AvahiProtocol protocol,
652 AvahiPublishFlags flags,
658 AvahiStringList *strlst) {
664 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
667 int avahi_server_add_service_va(
670 AvahiIfIndex interface,
671 AvahiProtocol protocol,
672 AvahiPublishFlags flags,
684 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
687 int avahi_server_add_service(
690 AvahiIfIndex interface,
691 AvahiProtocol protocol,
692 AvahiPublishFlags flags,
704 ret = avahi_server_add_service_va(s, g, interface, protocol, flags, name, type, domain, host, port, va);
710 static int server_update_service_txt_strlst_nocopy(
713 AvahiIfIndex interface,
714 AvahiProtocol protocol,
715 AvahiPublishFlags flags,
719 AvahiStringList *strlst) {
721 char svc_name[AVAHI_DOMAIN_NAME_MAX];
728 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
729 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
730 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_NO_COOKIE), AVAHI_ERR_INVALID_FLAGS);
731 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
732 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
733 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
736 domain = s->domain_name;
738 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
739 avahi_server_set_errno(s, ret);
744 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
745 strlst = add_magic_cookie(s, strlst);
747 ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
752 avahi_string_list_free(strlst);
757 int avahi_server_update_service_txt_strlst(
760 AvahiIfIndex interface,
761 AvahiProtocol protocol,
762 AvahiPublishFlags flags,
766 AvahiStringList *strlst) {
768 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
771 /** Update the TXT record for a service with the NULL terminated list of strings of the va_list. */
772 int avahi_server_update_service_txt_va(
775 AvahiIfIndex interface,
776 AvahiProtocol protocol,
777 AvahiPublishFlags flags,
783 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
786 /** Update the TXT record for a service with the NULL termonate list of strings */
787 int avahi_server_update_service_txt(
790 AvahiIfIndex interface,
791 AvahiProtocol protocol,
792 AvahiPublishFlags flags,
801 va_start(va, domain);
802 ret = avahi_server_update_service_txt_va(s, g, interface, protocol, flags, name, type, domain, va);
808 int avahi_server_add_service_subtype(
811 AvahiIfIndex interface,
812 AvahiProtocol protocol,
813 AvahiPublishFlags flags,
817 const char *subtype) {
820 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
826 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
827 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
828 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS);
829 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
830 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
831 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
832 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
835 domain = s->domain_name;
837 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
838 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
839 avahi_server_set_errno(s, ret);
843 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
851 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
852 static const char hex[] = "0123456789abcdef";
854 const uint8_t *k = p;
856 while (sl > 1 && pl > 0) {
857 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
873 int avahi_server_add_dns_server_address(
876 AvahiIfIndex interface,
877 AvahiProtocol protocol,
878 AvahiPublishFlags flags,
880 AvahiDNSServerType type,
881 const AvahiAddress *address,
882 uint16_t port /** should be 53 */) {
891 if (!AVAHI_IF_VALID(interface))
892 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
894 if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto))
895 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
897 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
898 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
901 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
903 if (domain && !avahi_is_valid_domain_name(domain))
904 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
907 domain = s->domain_name;
909 if (address->proto == AVAHI_PROTO_INET) {
910 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
911 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
912 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
913 r->data.a.address = address->data.ipv4;
915 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
916 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
917 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
918 r->data.aaaa.address = address->data.ipv6;
922 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
924 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
925 avahi_record_unref(r);
930 return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port);
933 int avahi_server_add_dns_server_name(
936 AvahiIfIndex interface,
937 AvahiProtocol protocol,
938 AvahiPublishFlags flags,
940 AvahiDNSServerType type,
942 uint16_t port /** should be 53 */) {
945 char t[256], *d = NULL, *n = NULL;
951 if (!AVAHI_IF_VALID(interface))
952 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
954 if (!AVAHI_PROTO_VALID(protocol))
955 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
957 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
958 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
961 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
963 if (!avahi_is_valid_domain_name(name))
964 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
966 if (domain && !avahi_is_valid_domain_name(domain))
967 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
970 domain = s->domain_name;
972 if (!(n = avahi_normalize_name_strdup(name)) ||
973 !(d = avahi_normalize_name_strdup(domain))) {
976 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
979 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", d);
982 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
984 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
987 r->data.srv.priority = 0;
988 r->data.srv.weight = 0;
989 r->data.srv.port = port;
990 r->data.srv.name = n;
991 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_NULL, r);
992 avahi_record_unref(r);
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(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)