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>
50 #include "dns-srv-rr.h"
53 void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
59 avahi_goodbye_entry(s, e, 1, 1);
61 /* Remove from linked list */
62 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
64 /* Remove from hash table indexed by name */
65 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
66 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
68 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
70 avahi_hashmap_remove(s->entries_by_key, e->record->key);
72 /* Remove from associated group */
74 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
76 avahi_record_unref(e->record);
80 void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
85 avahi_entry_free(s, g->entries);
87 if (g->register_time_event)
88 avahi_time_event_free(g->register_time_event);
90 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
94 void avahi_cleanup_dead_entries(AvahiServer *s) {
97 if (s->need_group_cleanup) {
98 AvahiSEntryGroup *g, *next;
100 for (g = s->groups; g; g = next) {
101 next = g->groups_next;
104 avahi_entry_group_free(s, g);
107 s->need_group_cleanup = 0;
110 if (s->need_entry_cleanup) {
111 AvahiEntry *e, *next;
113 for (e = s->entries; e; e = next) {
114 next = e->entries_next;
117 avahi_entry_free(s, e);
120 s->need_entry_cleanup = 0;
123 if (s->need_browser_cleanup)
124 avahi_browser_cleanup(s);
127 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
133 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
137 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
140 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
143 if ((interface <= 0 ||
145 e->interface == interface) &&
146 (protocol == AVAHI_PROTO_UNSPEC ||
147 e->protocol == AVAHI_PROTO_UNSPEC ||
148 e->protocol == protocol))
156 static AvahiEntry * server_add_internal(
159 AvahiIfIndex interface,
160 AvahiProtocol protocol,
161 AvahiPublishFlags flags,
169 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
170 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
171 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(
173 AVAHI_PUBLISH_NO_ANNOUNCE|
174 AVAHI_PUBLISH_NO_PROBE|
175 AVAHI_PUBLISH_UNIQUE|
176 AVAHI_PUBLISH_ALLOW_MULTIPLE|
177 AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS);
178 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME);
179 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL);
180 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN);
181 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD);
182 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS);
183 AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
184 (r->key->type != 0) &&
185 (r->key->type != AVAHI_DNS_TYPE_ANY) &&
186 (r->key->type != AVAHI_DNS_TYPE_OPT) &&
187 (r->key->type != AVAHI_DNS_TYPE_TKEY) &&
188 (r->key->type != AVAHI_DNS_TYPE_TSIG) &&
189 (r->key->type != AVAHI_DNS_TYPE_IXFR) &&
190 (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE);
192 if (flags & AVAHI_PUBLISH_UPDATE) {
193 AvahiRecord *old_record;
196 /* Update and existing record */
198 /* Find the first matching entry */
199 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
200 if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
206 /* Hmm, nothing found? */
208 avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
212 /* Update the entry */
213 old_record = e->record;
214 e->record = avahi_record_ref(r);
217 /* Announce our changes when needed */
218 if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
220 /* Remove the old entry from all caches, if needed */
221 if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
222 avahi_goodbye_entry(s, e, 1, 0);
224 /* Reannounce our updated entry */
225 avahi_reannounce_entry(s, e);
228 /* If we were the first entry in the list, we need to update the key */
230 avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
232 avahi_record_unref(old_record);
237 /* Add a new record */
239 if (check_record_conflict(s, interface, protocol, r, flags) < 0) {
240 avahi_server_set_errno(s, AVAHI_ERR_COLLISION);
244 if (!(e = avahi_new(AvahiEntry, 1))) {
245 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
250 e->record = avahi_record_ref(r);
252 e->interface = interface;
253 e->protocol = protocol;
257 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
259 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
261 /* Insert into hash table indexed by name */
262 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
263 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
264 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
266 /* Insert into group list */
268 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
270 avahi_announce_entry(s, e);
276 int avahi_server_add(
279 AvahiIfIndex interface,
280 AvahiProtocol protocol,
281 AvahiPublishFlags flags,
284 if (!server_add_internal(s, g, interface, protocol, flags, r))
285 return avahi_server_errno(s);
290 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
291 AvahiEntry **e = (AvahiEntry**) state;
296 *e = g ? g->entries : s->entries;
298 while (*e && (*e)->dead)
299 *e = g ? (*e)->by_group_next : (*e)->entries_next;
304 return avahi_record_ref((*e)->record);
307 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
313 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
315 for (e = s->entries; e; e = e->entries_next) {
322 if (!(t = avahi_record_to_string(e->record)))
323 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
325 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
328 callback(ln, userdata);
331 avahi_dump_caches(s->monitor, callback, userdata);
333 if (s->wide_area_lookup_engine)
334 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
338 static AvahiEntry *server_add_ptr_internal(
341 AvahiIfIndex interface,
342 AvahiProtocol protocol,
343 AvahiPublishFlags flags,
354 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
355 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME);
358 name = s->host_name_fqdn;
360 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) {
361 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
365 r->data.ptr.name = avahi_normalize_name_strdup(dest);
366 e = server_add_internal(s, g, interface, protocol, flags, r);
367 avahi_record_unref(r);
371 int avahi_server_add_ptr(
374 AvahiIfIndex interface,
375 AvahiProtocol protocol,
376 AvahiPublishFlags flags,
385 if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest)))
386 return avahi_server_errno(s);
391 int avahi_server_add_address(
394 AvahiIfIndex interface,
395 AvahiProtocol protocol,
396 AvahiPublishFlags flags,
400 char n[AVAHI_DOMAIN_NAME_MAX];
402 AvahiEntry *entry = NULL, *reverse = NULL;
408 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
409 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL);
410 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_REVERSE|AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS);
411 AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
413 /* Prepare the host naem */
416 name = s->host_name_fqdn;
418 AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n)));
422 /* Create the A/AAAA record */
424 if (a->proto == AVAHI_PROTO_INET) {
426 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
427 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
431 r->data.a.address = a->data.ipv4;
434 assert(a->proto == AVAHI_PROTO_INET6);
436 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
437 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
441 r->data.aaaa.address = a->data.ipv6;
444 entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
445 avahi_record_unref(r);
448 ret = avahi_server_errno(s);
452 /* Create the reverse lookup entry */
454 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
455 char reverse_n[AVAHI_DOMAIN_NAME_MAX];
456 avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n));
458 if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) {
459 ret = avahi_server_errno(s);
466 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
468 avahi_entry_free(s, entry);
470 avahi_entry_free(s, reverse);
476 static AvahiEntry *server_add_txt_strlst_nocopy(
479 AvahiIfIndex interface,
480 AvahiProtocol protocol,
481 AvahiPublishFlags flags,
484 AvahiStringList *strlst) {
491 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
492 avahi_string_list_free(strlst);
493 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
497 r->data.txt.string_list = strlst;
498 e = server_add_internal(s, g, interface, protocol, flags, r);
499 avahi_record_unref(r);
504 static AvahiStringList *add_magic_cookie(
506 AvahiStringList *strlst) {
510 if (!s->config.add_service_cookie)
513 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
514 /* This string list already contains a magic cookie */
517 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
520 static int server_add_service_strlst_nocopy(
523 AvahiIfIndex interface,
524 AvahiProtocol protocol,
525 AvahiPublishFlags flags,
531 AvahiStringList *strlst) {
533 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
534 AvahiRecord *r = NULL;
536 AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL;
542 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
543 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
544 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS);
545 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
546 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
547 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
548 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME);
551 domain = s->domain_name;
554 host = s->host_name_fqdn;
556 if (!(h = avahi_normalize_name_strdup(host))) {
557 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
561 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
562 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
563 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
564 avahi_server_set_errno(s, ret);
568 /* Add service enumeration PTR record */
570 if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) {
571 ret = avahi_server_errno(s);
577 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
578 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
582 r->data.srv.priority = 0;
583 r->data.srv.weight = 0;
584 r->data.srv.port = port;
585 r->data.srv.name = h;
587 srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
588 avahi_record_unref(r);
591 ret = avahi_server_errno(s);
597 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
598 strlst = add_magic_cookie(s, strlst);
600 txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
604 ret = avahi_server_errno(s);
608 /* Add service type enumeration record */
610 if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) {
611 ret = avahi_server_errno(s);
616 if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
618 avahi_entry_free(s, srv_entry);
620 avahi_entry_free(s, txt_entry);
622 avahi_entry_free(s, ptr_entry);
624 avahi_entry_free(s, enum_entry);
627 avahi_string_list_free(strlst);
633 int avahi_server_add_service_strlst(
636 AvahiIfIndex interface,
637 AvahiProtocol protocol,
638 AvahiPublishFlags flags,
644 AvahiStringList *strlst) {
650 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
653 int avahi_server_add_service(
656 AvahiIfIndex interface,
657 AvahiProtocol protocol,
658 AvahiPublishFlags flags,
670 ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
676 static int server_update_service_txt_strlst_nocopy(
679 AvahiIfIndex interface,
680 AvahiProtocol protocol,
681 AvahiPublishFlags flags,
685 AvahiStringList *strlst) {
687 char svc_name[AVAHI_DOMAIN_NAME_MAX];
695 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
696 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
697 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE), AVAHI_ERR_INVALID_FLAGS);
698 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
699 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
700 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
703 domain = s->domain_name;
705 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
706 avahi_server_set_errno(s, ret);
711 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
712 strlst = add_magic_cookie(s, strlst);
714 e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
718 ret = avahi_server_errno(s);
722 avahi_string_list_free(strlst);
727 int avahi_server_update_service_txt_strlst(
730 AvahiIfIndex interface,
731 AvahiProtocol protocol,
732 AvahiPublishFlags flags,
736 AvahiStringList *strlst) {
738 return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
741 /** Update the TXT record for a service with the NULL termonate list of strings */
742 int avahi_server_update_service_txt(
745 AvahiIfIndex interface,
746 AvahiProtocol protocol,
747 AvahiPublishFlags flags,
756 va_start(va, domain);
757 ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
763 int avahi_server_add_service_subtype(
766 AvahiIfIndex interface,
767 AvahiProtocol protocol,
768 AvahiPublishFlags flags,
772 const char *subtype) {
775 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
781 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
782 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
783 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS);
784 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
785 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
786 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
787 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
790 domain = s->domain_name;
792 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
793 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
794 avahi_server_set_errno(s, ret);
798 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
806 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
807 static const char hex[] = "0123456789abcdef";
809 const uint8_t *k = p;
811 while (sl > 1 && pl > 0) {
812 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
828 static AvahiEntry * server_add_dns_server_name(
831 AvahiIfIndex interface,
832 AvahiProtocol protocol,
833 AvahiPublishFlags flags,
835 AvahiDNSServerType type,
837 uint16_t port /** should be 53 */) {
840 char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n;
847 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS);
848 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
849 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT);
850 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
851 AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
854 domain = s->domain_name;
856 if (!(n = avahi_normalize_name_strdup(name))) {
857 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
861 AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d)));
863 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d);
865 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
866 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
871 r->data.srv.priority = 0;
872 r->data.srv.weight = 0;
873 r->data.srv.port = port;
874 r->data.srv.name = n;
875 e = server_add_internal(s, g, interface, protocol, 0, r);
876 avahi_record_unref(r);
881 int avahi_server_add_dns_server_address(
884 AvahiIfIndex interface,
885 AvahiProtocol protocol,
886 AvahiPublishFlags flags,
888 AvahiDNSServerType type,
889 const AvahiAddress *address,
890 uint16_t port /** should be 53 */) {
894 AvahiEntry *a_entry, *s_entry;
899 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
900 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL);
901 AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS);
902 AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
903 AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT);
904 AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), 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 a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
925 avahi_record_unref(r);
928 return avahi_server_errno(s);
930 if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) {
931 if (!(flags & AVAHI_PUBLISH_UPDATE))
932 avahi_entry_free(s, a_entry);
933 return avahi_server_errno(s);
939 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
942 if (g->state == state)
945 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
947 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
949 /* If the entry group was established for a time longer then
950 * 5s, reset the establishment trial counter */
952 if (avahi_age(&g->established_at) > 5000000)
953 g->n_register_try = 0;
956 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
958 /* If the entry group is now established, remember the time
961 gettimeofday(&g->established_at, NULL);
966 g->callback(g->server, g, state, g->userdata);
969 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
974 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
975 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
980 g->callback = callback;
981 g->userdata = userdata;
983 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
985 g->n_register_try = 0;
986 g->register_time_event = NULL;
987 g->register_time.tv_sec = 0;
988 g->register_time.tv_usec = 0;
989 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
991 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
995 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
1001 for (e = g->entries; e; e = e->by_group_next) {
1003 avahi_goodbye_entry(g->server, e, 1, 1);
1008 if (g->register_time_event) {
1009 avahi_time_event_free(g->register_time_event);
1010 g->register_time_event = NULL;
1015 g->server->need_group_cleanup = 1;
1016 g->server->need_entry_cleanup = 1;
1019 static void entry_group_commit_real(AvahiSEntryGroup *g) {
1022 gettimeofday(&g->register_time, NULL);
1024 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1027 avahi_announce_group(g->server, g);
1028 avahi_s_entry_group_check_probed(g, 0);
1032 static void entry_group_register_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) {
1033 AvahiSEntryGroup *g = userdata;
1036 /* avahi_log_debug("Holdoff passed, waking up and going on."); */
1038 avahi_time_event_free(g->register_time_event);
1039 g->register_time_event = NULL;
1041 /* Holdoff time passed, so let's start probing */
1042 entry_group_commit_real(g);
1045 int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
1051 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
1052 return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
1054 g->n_register_try++;
1056 avahi_timeval_add(&g->register_time,
1057 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
1058 AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
1059 AVAHI_RR_HOLDOFF_MSEC));
1061 gettimeofday(&now, NULL);
1063 if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
1064 /* Holdoff time passed, so let's start probing */
1065 /* avahi_log_debug("Holdoff passed, directly going on."); */
1067 entry_group_commit_real(g);
1069 /* avahi_log_debug("Holdoff not passed, sleeping."); */
1071 /* Holdoff time has not yet passed, so let's wait */
1072 assert(!g->register_time_event);
1073 g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
1075 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1081 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
1085 for (e = g->entries; e; e = e->by_group_next) {
1087 avahi_goodbye_entry(g->server, e, 1, 1);
1091 g->server->need_entry_cleanup = 1;
1093 if (g->register_time_event) {
1094 avahi_time_event_free(g->register_time_event);
1095 g->register_time_event = NULL;
1100 gettimeofday(&g->register_time, NULL);
1102 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
1105 int avahi_entry_is_commited(AvahiEntry *e) {
1110 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1111 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1114 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
1121 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
1124 g->userdata = userdata;
1127 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
1133 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
1137 /* Look for an entry that is not dead */
1138 for (e = g->entries; e; e = e->by_group_next)