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>
47 #include "dns-srv-rr.h"
49 void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
55 avahi_goodbye_entry(s, e, 1, 1);
57 /* Remove from linked list */
58 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
60 /* Remove from hash table indexed by name */
61 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
62 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
64 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
66 avahi_hashmap_remove(s->entries_by_key, e->record->key);
68 /* Remove from associated group */
70 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
72 avahi_record_unref(e->record);
76 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
81 avahi_entry_free(s, g->entries);
83 if (g->register_time_event)
84 avahi_time_event_free(g->register_time_event);
86 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
90 void avahi_cleanup_dead_entries(AvahiServer *s) {
93 if (s->need_group_cleanup) {
94 AvahiSEntryGroup *g, *next;
96 for (g = s->groups; g; g = next) {
97 next = g->groups_next;
100 avahi_entry_group_free(s, g);
103 s->need_group_cleanup = 0;
106 if (s->need_entry_cleanup) {
107 AvahiEntry *e, *next;
109 for (e = s->entries; e; e = next) {
110 next = e->entries_next;
113 avahi_entry_free(s, e);
116 s->need_entry_cleanup = 0;
119 if (s->need_browser_cleanup)
120 avahi_browser_cleanup(s);
123 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
129 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
133 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
136 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
139 if ((interface <= 0 ||
141 e->interface == interface) &&
142 (protocol == AVAHI_PROTO_UNSPEC ||
143 e->protocol == AVAHI_PROTO_UNSPEC ||
144 e->protocol == protocol))
152 int avahi_server_add(
155 AvahiIfIndex interface,
156 AvahiProtocol protocol,
157 AvahiPublishFlags flags,
163 if (!AVAHI_IF_VALID(interface))
164 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
166 if (!AVAHI_PROTO_VALID(protocol))
167 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
169 if (!AVAHI_FLAGS_VALID(
171 AVAHI_PUBLISH_NO_ANNOUNCE|
172 AVAHI_PUBLISH_NO_PROBE|
173 AVAHI_PUBLISH_UNIQUE|
174 AVAHI_PUBLISH_ALLOW_MULTIPLE|
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(&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);
448 static int server_add_txt_strlst_nocopy(
451 AvahiIfIndex interface,
452 AvahiProtocol protocol,
453 AvahiPublishFlags flags,
456 AvahiStringList *strlst) {
463 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
464 avahi_string_list_free(strlst);
465 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
468 r->data.txt.string_list = strlst;
469 ret = avahi_server_add(s, g, interface, protocol, flags, r);
470 avahi_record_unref(r);
475 static AvahiStringList *add_magic_cookie(
477 AvahiStringList *strlst) {
481 if (!s->config.add_service_cookie)
484 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
485 /* This string list already contains a magic cookie */
488 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
491 static int server_add_service_strlst_nocopy(
494 AvahiIfIndex interface,
495 AvahiProtocol protocol,
496 AvahiPublishFlags flags,
502 AvahiStringList *strlst) {
504 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
505 AvahiRecord *r = NULL;
512 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
513 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
514 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS);
515 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
516 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
517 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
518 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME);
521 domain = s->domain_name;
524 host = s->host_name_fqdn;
526 if (!(h = avahi_normalize_name_strdup(host))) {
527 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
531 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
532 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
533 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
534 avahi_server_set_errno(s, ret);
538 /* Add service enumeration PTR record */
540 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
545 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
546 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
550 r->data.srv.priority = 0;
551 r->data.srv.weight = 0;
552 r->data.srv.port = port;
553 r->data.srv.name = h;
555 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
556 avahi_record_unref(r);
563 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
564 strlst = add_magic_cookie(s, strlst);
566 ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
572 /* Add service type enumeration record */
574 ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name);
578 avahi_string_list_free(strlst);
584 int avahi_server_add_service_strlst(
587 AvahiIfIndex interface,
588 AvahiProtocol protocol,
589 AvahiPublishFlags flags,
595 AvahiStringList *strlst) {
601 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
604 int avahi_server_add_service(
607 AvahiIfIndex interface,
608 AvahiProtocol protocol,
609 AvahiPublishFlags flags,
621 ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
627 static int server_update_service_txt_strlst_nocopy(
630 AvahiIfIndex interface,
631 AvahiProtocol protocol,
632 AvahiPublishFlags flags,
636 AvahiStringList *strlst) {
638 char svc_name[AVAHI_DOMAIN_NAME_MAX];
645 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
646 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
647 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE), AVAHI_ERR_INVALID_FLAGS);
648 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
649 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
650 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
653 domain = s->domain_name;
655 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
656 avahi_server_set_errno(s, ret);
661 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
662 strlst = add_magic_cookie(s, strlst);
664 ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
669 avahi_string_list_free(strlst);
674 int avahi_server_update_service_txt_strlst(
677 AvahiIfIndex interface,
678 AvahiProtocol protocol,
679 AvahiPublishFlags flags,
683 AvahiStringList *strlst) {
685 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
688 /** Update the TXT record for a service with the NULL termonate list of strings */
689 int avahi_server_update_service_txt(
692 AvahiIfIndex interface,
693 AvahiProtocol protocol,
694 AvahiPublishFlags flags,
703 va_start(va, domain);
704 ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
710 int avahi_server_add_service_subtype(
713 AvahiIfIndex interface,
714 AvahiProtocol protocol,
715 AvahiPublishFlags flags,
719 const char *subtype) {
722 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_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, 0), 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);
734 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
737 domain = s->domain_name;
739 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
740 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
741 avahi_server_set_errno(s, ret);
745 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
753 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
754 static const char hex[] = "0123456789abcdef";
756 const uint8_t *k = p;
758 while (sl > 1 && pl > 0) {
759 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
775 int avahi_server_add_dns_server_address(
778 AvahiIfIndex interface,
779 AvahiProtocol protocol,
780 AvahiPublishFlags flags,
782 AvahiDNSServerType type,
783 const AvahiAddress *address,
784 uint16_t port /** should be 53 */) {
793 if (!AVAHI_IF_VALID(interface))
794 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
796 if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto))
797 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
799 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
800 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
803 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
805 if (domain && !avahi_is_valid_domain_name(domain))
806 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
809 domain = s->domain_name;
811 if (address->proto == AVAHI_PROTO_INET) {
812 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
813 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
814 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
815 r->data.a.address = address->data.ipv4;
817 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
818 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
819 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
820 r->data.aaaa.address = address->data.ipv6;
824 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
826 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
827 avahi_record_unref(r);
832 return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port);
835 int avahi_server_add_dns_server_name(
838 AvahiIfIndex interface,
839 AvahiProtocol protocol,
840 AvahiPublishFlags flags,
842 AvahiDNSServerType type,
844 uint16_t port /** should be 53 */) {
847 char t[256], *d = NULL, *n = NULL;
853 if (!AVAHI_IF_VALID(interface))
854 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
856 if (!AVAHI_PROTO_VALID(protocol))
857 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
859 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
860 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
863 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
865 if (!avahi_is_valid_domain_name(name))
866 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
868 if (domain && !avahi_is_valid_domain_name(domain))
869 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
872 domain = s->domain_name;
874 if (!(n = avahi_normalize_name_strdup(name)) ||
875 !(d = avahi_normalize_name_strdup(domain))) {
878 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
881 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", d);
884 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
886 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
889 r->data.srv.priority = 0;
890 r->data.srv.weight = 0;
891 r->data.srv.port = port;
892 r->data.srv.name = n;
893 ret = avahi_server_add(s, g, interface, protocol, 0, r);
894 avahi_record_unref(r);
899 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
902 if (g->state == state)
905 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
907 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
909 /* If the entry group was established for a time longer then
910 * 5s, reset the establishment trial counter */
912 if (avahi_age(&g->established_at) > 5000000)
913 g->n_register_try = 0;
916 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
918 /* If the entry group is now established, remember the time
921 gettimeofday(&g->established_at, NULL);
926 g->callback(g->server, g, state, g->userdata);
929 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
934 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
935 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
940 g->callback = callback;
941 g->userdata = userdata;
943 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
945 g->n_register_try = 0;
946 g->register_time_event = NULL;
947 g->register_time.tv_sec = 0;
948 g->register_time.tv_usec = 0;
949 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
951 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
955 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
961 for (e = g->entries; e; e = e->by_group_next) {
963 avahi_goodbye_entry(g->server, e, 1, 1);
968 if (g->register_time_event) {
969 avahi_time_event_free(g->register_time_event);
970 g->register_time_event = NULL;
975 g->server->need_group_cleanup = 1;
976 g->server->need_entry_cleanup = 1;
979 static void entry_group_commit_real(AvahiSEntryGroup *g) {
982 gettimeofday(&g->register_time, NULL);
984 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
987 avahi_announce_group(g->server, g);
988 avahi_s_entry_group_check_probed(g, 0);
992 static void entry_group_register_time_event_callback(AvahiTimeEvent *e, void* userdata) {
993 AvahiSEntryGroup *g = userdata;
996 /* avahi_log_debug("Holdoff passed, waking up and going on."); */
998 avahi_time_event_free(g->register_time_event);
999 g->register_time_event = NULL;
1001 /* Holdoff time passed, so let's start probing */
1002 entry_group_commit_real(g);
1005 int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
1011 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
1012 return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
1014 g->n_register_try++;
1016 avahi_timeval_add(&g->register_time,
1017 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
1018 AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
1019 AVAHI_RR_HOLDOFF_MSEC));
1021 gettimeofday(&now, NULL);
1023 if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
1024 /* Holdoff time passed, so let's start probing */
1025 /* avahi_log_debug("Holdoff passed, directly going on."); */
1027 entry_group_commit_real(g);
1029 /* avahi_log_debug("Holdoff not passed, sleeping."); */
1031 /* Holdoff time has not yet passed, so let's wait */
1032 assert(!g->register_time_event);
1033 g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
1035 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1041 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
1045 for (e = g->entries; e; e = e->by_group_next) {
1047 avahi_goodbye_entry(g->server, e, 1, 1);
1051 g->server->need_entry_cleanup = 1;
1053 if (g->register_time_event) {
1054 avahi_time_event_free(g->register_time_event);
1055 g->register_time_event = NULL;
1060 gettimeofday(&g->register_time, NULL);
1062 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
1065 int avahi_entry_is_commited(AvahiEntry *e) {
1070 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1071 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1074 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
1081 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
1084 g->userdata = userdata;
1087 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
1093 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
1097 /* Look for an entry that is not dead */
1098 for (e = g->entries; e; e = e->by_group_next)