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 #define AVAHI_RR_HOLDOFF_MSEC 1000
49 #define AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT 60000
50 #define AVAHI_RR_RATE_LIMIT_COUNT 15
52 static void free_entry(AvahiServer*s, AvahiEntry *e) {
58 avahi_goodbye_entry(s, e, 1);
60 /* Remove from linked list */
61 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
63 /* Remove from hash table indexed by name */
64 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
65 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
67 avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
69 avahi_hashmap_remove(s->entries_by_key, e->record->key);
71 /* Remove from associated group */
73 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
75 avahi_record_unref(e->record);
79 static void free_group(AvahiServer *s, AvahiSEntryGroup *g) {
84 free_entry(s, g->entries);
86 if (g->register_time_event)
87 avahi_time_event_free(g->register_time_event);
89 AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
93 static void cleanup_dead(AvahiServer *s) {
96 if (s->need_group_cleanup) {
97 AvahiSEntryGroup *g, *next;
99 for (g = s->groups; g; g = next) {
100 next = g->groups_next;
106 s->need_group_cleanup = 0;
109 if (s->need_entry_cleanup) {
110 AvahiEntry *e, *next;
112 for (e = s->entries; e; e = next) {
113 next = e->entries_next;
119 s->need_entry_cleanup = 0;
122 if (s->need_browser_cleanup)
123 avahi_browser_cleanup(s);
126 static void enum_aux_records(AvahiServer *s, AvahiInterface *i, const char *name, uint16_t type, void (*callback)(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata), void* userdata) {
135 assert(type != AVAHI_DNS_TYPE_ANY);
137 if (!(k = avahi_key_new(name, AVAHI_DNS_CLASS_IN, type)))
140 for (e = avahi_hashmap_lookup(s->entries_by_key, k); e; e = e->by_key_next)
141 if (!e->dead && avahi_entry_is_registered(s, e, i))
142 callback(s, e->record, e->flags & AVAHI_PUBLISH_UNIQUE, userdata);
147 void avahi_server_enumerate_aux_records(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, void (*callback)(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata), void* userdata) {
153 if (r->key->clazz == AVAHI_DNS_CLASS_IN) {
154 if (r->key->type == AVAHI_DNS_TYPE_PTR) {
155 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_SRV, callback, userdata);
156 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_TXT, callback, userdata);
157 } else if (r->key->type == AVAHI_DNS_TYPE_SRV) {
158 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_A, callback, userdata);
159 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_AAAA, callback, userdata);
164 void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry *e, int unicast_response, int auxiliary) {
169 avahi_record_list_push(s->record_list, e->record, e->flags & AVAHI_PUBLISH_UNIQUE, unicast_response, auxiliary);
172 void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, int unicast_response) {
180 /* avahi_log_debug("Posting responses matching [%s]", txt = avahi_key_to_string(k)); */
181 /* avahi_free(txt); */
183 if (avahi_key_is_pattern(k)) {
185 /* Handle ANY query */
187 for (e = s->entries; e; e = e->entries_next)
188 if (!e->dead && avahi_key_pattern_match(k, e->record->key) && avahi_entry_is_registered(s, e, i))
189 avahi_server_prepare_response(s, i, e, unicast_response, 0);
193 /* Handle all other queries */
195 for (e = avahi_hashmap_lookup(s->entries_by_key, k); e; e = e->by_key_next)
196 if (!e->dead && avahi_entry_is_registered(s, e, i))
197 avahi_server_prepare_response(s, i, e, unicast_response, 0);
201 static void withdraw_entry(AvahiServer *s, AvahiEntry *e) {
208 for (k = e->group->entries; k; k = k->by_group_next) {
210 avahi_goodbye_entry(s, k, 0);
215 e->group->n_probing = 0;
217 avahi_s_entry_group_change_state(e->group, AVAHI_ENTRY_GROUP_COLLISION);
219 avahi_goodbye_entry(s, e, 0);
223 s->need_entry_cleanup = 1;
226 static void withdraw_rrset(AvahiServer *s, AvahiKey *key) {
232 for (e = avahi_hashmap_lookup(s->entries_by_key, key); e; e = e->by_key_next)
234 withdraw_entry(s, e);
237 static void incoming_probe(AvahiServer *s, AvahiRecord *record, AvahiInterface *i) {
240 int ours = 0, won = 0, lost = 0;
246 t = avahi_record_to_string(record);
248 /* avahi_log_debug("incoming_probe()"); */
250 for (e = avahi_hashmap_lookup(s->entries_by_key, record->key); e; e = n) {
257 if ((cmp = avahi_record_lexicographical_compare(e->record, record)) == 0) {
262 if (avahi_entry_is_probing(s, e, i)) {
274 avahi_log_debug("Recieved conflicting probe [%s]. Local host won.", t);
276 avahi_log_debug("Recieved conflicting probe [%s]. Local host lost. Withdrawing.", t);
277 withdraw_rrset(s, record->key);
279 /* avahi_log_debug("Not conflicting probe"); */
285 static int handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord *record, int unique, const AvahiAddress *a) {
286 int valid = 1, ours = 0, conflict = 0, withdraw_immediately = 0;
287 AvahiEntry *e, *n, *conflicting_entry = NULL;
294 /* avahi_log_debug("CHECKING FOR CONFLICT: [%s]", t); */
296 for (e = avahi_hashmap_lookup(s->entries_by_key, record->key); e; e = n) {
302 /* Check if the incoming is a goodbye record */
303 if (avahi_record_is_goodbye(record)) {
305 if (avahi_record_equal_no_ttl(e->record, record)) {
309 t = avahi_record_to_string(record);
310 avahi_log_debug("Recieved goodbye record for one of our records [%s]. Refreshing.", t);
311 avahi_server_prepare_matching_responses(s, i, e->record->key, 0);
318 /* If the goodybe packet doesn't match one of our own RRs, we simply ignore it. */
322 if (!(e->flags & AVAHI_PUBLISH_UNIQUE) && !unique)
325 /* Either our entry or the other is intended to be unique, so let's check */
327 if (avahi_record_equal_no_ttl(e->record, record)) {
328 ours = 1; /* We have an identical record, so this is no conflict */
330 /* Check wheter there is a TTL conflict */
331 if (record->ttl <= e->record->ttl/2 &&
332 avahi_entry_is_registered(s, e, i)) {
335 t = avahi_record_to_string(record);
337 avahi_log_debug("Recieved record with bad TTL [%s]. Refreshing.", t);
338 avahi_server_prepare_matching_responses(s, i, e->record->key, 0);
344 /* There's no need to check the other entries of this RRset */
349 if (avahi_entry_is_registered(s, e, i)) {
351 /* A conflict => we have to return to probe mode */
353 conflicting_entry = e;
355 } else if (avahi_entry_is_probing(s, e, i)) {
357 /* We are currently registering a matching record, but
358 * someone else already claimed it, so let's
361 withdraw_immediately = 1;
366 /* avahi_log_debug("ours=%i conflict=%i", ours, conflict); */
368 if (!ours && conflict) {
373 t = avahi_record_to_string(record);
375 if (withdraw_immediately) {
376 avahi_log_debug("Recieved conflicting record [%s] with local record to be. Withdrawing.", t);
377 withdraw_rrset(s, record->key);
379 assert(conflicting_entry);
380 avahi_log_debug("Recieved conflicting record [%s]. Resetting our record.", t);
381 avahi_entry_return_to_initial_state(s, conflicting_entry, i);
383 /* Local unique records are returned to probing
384 * state. Local shared records are reannounced. */
393 static void append_aux_callback(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata) {
394 int *unicast_response = userdata;
398 assert(unicast_response);
400 avahi_record_list_push(s->record_list, r, flush_cache, *unicast_response, 1);
403 static void append_aux_records_to_list(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, int unicast_response) {
407 avahi_server_enumerate_aux_records(s, i, r, append_aux_callback, &unicast_response);
410 void avahi_server_generate_response(AvahiServer *s, AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port, int legacy_unicast, int immediately) {
414 assert(!legacy_unicast || (a && port > 0 && p));
416 if (legacy_unicast) {
417 AvahiDnsPacket *reply;
420 if (!(reply = avahi_dns_packet_new_reply(p, 512 /* unicast DNS maximum packet size is 512 */ , 1, 1)))
423 while ((r = avahi_record_list_next(s->record_list, NULL, NULL, NULL))) {
425 append_aux_records_to_list(s, i, r, 0);
427 if (avahi_dns_packet_append_record(reply, r, 0, 10))
428 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
430 char *t = avahi_record_to_string(r);
431 avahi_log_warn("Record [%s] not fitting in legacy unicast packet, dropping.", t);
435 avahi_record_unref(r);
438 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
439 avahi_interface_send_packet_unicast(i, reply, a, port);
441 avahi_dns_packet_free(reply);
444 int unicast_response, flush_cache, auxiliary;
445 AvahiDnsPacket *reply = NULL;
448 /* In case the query packet was truncated never respond
449 immediately, because known answer suppression records might be
450 contained in later packets */
451 int tc = p && !!(avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & AVAHI_DNS_FLAG_TC);
453 while ((r = avahi_record_list_next(s->record_list, &flush_cache, &unicast_response, &auxiliary))) {
455 if (!avahi_interface_post_response(i, r, flush_cache, a, immediately || (flush_cache && !tc && !auxiliary)) && unicast_response) {
457 append_aux_records_to_list(s, i, r, unicast_response);
459 /* Due to some reasons the record has not been scheduled.
460 * The client requested an unicast response in that
461 * case. Therefore we prepare such a response */
468 if (!(reply = avahi_dns_packet_new_reply(p, i->hardware->mtu, 0, 0)))
472 if (avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
474 /* Appending this record succeeded, so incremeant
475 * the specific header field, and return to the caller */
477 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
482 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
485 /* The record is too large for one packet, so create a larger packet */
487 avahi_dns_packet_free(reply);
488 size = avahi_record_get_estimate_size(r) + AVAHI_DNS_PACKET_HEADER_SIZE;
489 if (size > AVAHI_DNS_PACKET_MAX_SIZE)
490 size = AVAHI_DNS_PACKET_MAX_SIZE;
492 if (!(reply = avahi_dns_packet_new_reply(p, size, 0, 1)))
495 if (!avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
497 avahi_dns_packet_free(reply);
498 t = avahi_record_to_string(r);
499 avahi_log_warn("Record [%s] too large, doesn't fit in any packet!", t);
503 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
506 /* Appending the record didn't succeeed, so let's send this packet, and create a new one */
507 avahi_interface_send_packet_unicast(i, reply, a, port);
508 avahi_dns_packet_free(reply);
513 avahi_record_unref(r);
517 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
518 avahi_interface_send_packet_unicast(i, reply, a, port);
519 avahi_dns_packet_free(reply);
523 avahi_record_list_flush(s->record_list);
527 static void reflect_response(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, int flush_cache) {
534 if (!s->config.enable_reflector)
537 for (j = s->monitor->interfaces; j; j = j->interface_next)
538 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol))
539 avahi_interface_post_response(j, r, flush_cache, NULL, 1);
542 static void* reflect_cache_walk_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, void* userdata) {
543 AvahiServer *s = userdata;
550 avahi_record_list_push(s->record_list, e->record, e->cache_flush, 0, 0);
554 static void reflect_query(AvahiServer *s, AvahiInterface *i, AvahiKey *k) {
561 if (!s->config.enable_reflector)
564 for (j = s->monitor->interfaces; j; j = j->interface_next)
565 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol)) {
566 /* Post the query to other networks */
567 avahi_interface_post_query(j, k, 1);
569 /* Reply from caches of other network. This is needed to
570 * "work around" known answer suppression. */
572 avahi_cache_walk(j->cache, k, reflect_cache_walk_callback, s);
576 static void reflect_probe(AvahiServer *s, AvahiInterface *i, AvahiRecord *r) {
583 if (!s->config.enable_reflector)
586 for (j = s->monitor->interfaces; j; j = j->interface_next)
587 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol))
588 avahi_interface_post_probe(j, r, 1);
591 static void handle_query_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, uint16_t port, int legacy_unicast, int from_local_iface) {
600 /* avahi_log_debug("query"); */
602 assert(avahi_record_list_is_empty(s->record_list));
604 is_probe = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) > 0;
606 /* Handle the questions */
607 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); n > 0; n --) {
609 int unicast_response = 0;
611 if (!(key = avahi_dns_packet_consume_key(p, &unicast_response))) {
612 avahi_log_warn("Packet too short (1)");
616 if (!legacy_unicast && !from_local_iface) {
617 reflect_query(s, i, key);
618 avahi_cache_start_poof(i->cache, key, a);
621 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0 &&
622 !(avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & AVAHI_DNS_FLAG_TC))
623 /* Allow our own queries to be suppressed by incoming
624 * queries only when they do not include known answers */
625 avahi_query_scheduler_incoming(i->query_scheduler, key);
627 avahi_server_prepare_matching_responses(s, i, key, unicast_response);
628 avahi_key_unref(key);
631 if (!legacy_unicast) {
633 /* Known Answer Suppression */
634 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT); n > 0; n --) {
638 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
639 avahi_log_warn("Packet too short (2)");
643 if (handle_conflict(s, i, record, unique, a)) {
644 avahi_response_scheduler_suppress(i->response_scheduler, record, a);
645 avahi_record_list_drop(s->record_list, record);
646 avahi_cache_stop_poof(i->cache, record, a);
649 avahi_record_unref(record);
653 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT); n > 0; n --) {
657 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
658 avahi_log_warn("Packet too short (3)");
662 if (!avahi_key_is_pattern(record->key)) {
663 if (!from_local_iface)
664 reflect_probe(s, i, record);
665 incoming_probe(s, record, i);
668 avahi_record_unref(record);
672 if (!avahi_record_list_is_empty(s->record_list))
673 avahi_server_generate_response(s, i, p, a, port, legacy_unicast, is_probe);
678 avahi_record_list_flush(s->record_list);
681 static void handle_response_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, int from_local_iface) {
689 /* avahi_log_debug("response"); */
691 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
692 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); n > 0; n--) {
697 if (!(record = avahi_dns_packet_consume_record(p, &cache_flush))) {
698 avahi_log_warn("Packet too short (4)");
702 if (!avahi_key_is_pattern(record->key)) {
704 /* avahi_log_debug("Handling response: %s", txt = avahi_record_to_string(record)); */
705 /* avahi_free(txt); */
707 if (handle_conflict(s, i, record, cache_flush, a)) {
708 if (!from_local_iface)
709 reflect_response(s, i, record, cache_flush);
710 avahi_cache_update(i->cache, record, cache_flush, a);
711 avahi_response_scheduler_incoming(i->response_scheduler, record, cache_flush);
715 avahi_record_unref(record);
718 /* If the incoming response contained a conflicting record, some
719 records have been scheduling for sending. We need to flush them
721 if (!avahi_record_list_is_empty(s->record_list))
722 avahi_server_generate_response(s, i, NULL, NULL, 0, 0, 1);
725 static AvahiLegacyUnicastReflectSlot* allocate_slot(AvahiServer *s) {
726 unsigned n, idx = (unsigned) -1;
727 AvahiLegacyUnicastReflectSlot *slot;
731 if (!s->legacy_unicast_reflect_slots)
732 s->legacy_unicast_reflect_slots = avahi_new0(AvahiLegacyUnicastReflectSlot*, AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS);
734 for (n = 0; n < AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS; n++, s->legacy_unicast_reflect_id++) {
735 idx = s->legacy_unicast_reflect_id % AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS;
737 if (!s->legacy_unicast_reflect_slots[idx])
741 if (idx == (unsigned) -1 || s->legacy_unicast_reflect_slots[idx])
744 if (!(slot = avahi_new(AvahiLegacyUnicastReflectSlot, 1)))
745 return NULL; /* OOM */
747 s->legacy_unicast_reflect_slots[idx] = slot;
748 slot->id = s->legacy_unicast_reflect_id++;
754 static void deallocate_slot(AvahiServer *s, AvahiLegacyUnicastReflectSlot *slot) {
760 idx = slot->id % AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS;
762 assert(s->legacy_unicast_reflect_slots[idx] == slot);
764 avahi_time_event_free(slot->time_event);
767 s->legacy_unicast_reflect_slots[idx] = NULL;
770 static void free_slots(AvahiServer *s) {
774 if (!s->legacy_unicast_reflect_slots)
777 for (idx = 0; idx < AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS; idx ++)
778 if (s->legacy_unicast_reflect_slots[idx])
779 deallocate_slot(s, s->legacy_unicast_reflect_slots[idx]);
781 avahi_free(s->legacy_unicast_reflect_slots);
782 s->legacy_unicast_reflect_slots = NULL;
785 static AvahiLegacyUnicastReflectSlot* find_slot(AvahiServer *s, uint16_t id) {
790 if (!s->legacy_unicast_reflect_slots)
793 idx = id % AVAHI_MAX_LEGACY_UNICAST_REFLECT_SLOTS;
795 if (!s->legacy_unicast_reflect_slots[idx] || s->legacy_unicast_reflect_slots[idx]->id != id)
798 return s->legacy_unicast_reflect_slots[idx];
801 static void legacy_unicast_reflect_slot_timeout(AvahiTimeEvent *e, void *userdata) {
802 AvahiLegacyUnicastReflectSlot *slot = userdata;
806 assert(slot->time_event == e);
808 deallocate_slot(slot->server, slot);
811 static void reflect_legacy_unicast_query_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, uint16_t port) {
812 AvahiLegacyUnicastReflectSlot *slot;
820 assert(i->protocol == a->proto);
822 if (!s->config.enable_reflector)
825 /* avahi_log_debug("legacy unicast reflector"); */
827 /* Reflecting legacy unicast queries is a little more complicated
828 than reflecting normal queries, since we must route the
829 responses back to the right client. Therefore we must store
830 some information for finding the right client contact data for
831 response packets. In contrast to normal queries legacy
832 unicast query and response packets are reflected untouched and
833 are not reassembled into larger packets */
835 if (!(slot = allocate_slot(s))) {
836 /* No slot available, we drop this legacy unicast query */
837 avahi_log_warn("No slot available for legacy unicast reflection, dropping query packet.");
841 slot->original_id = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID);
844 slot->interface = i->hardware->index;
846 avahi_elapse_time(&slot->elapse_time, 2000, 0);
847 slot->time_event = avahi_time_event_new(s->time_event_queue, &slot->elapse_time, legacy_unicast_reflect_slot_timeout, slot);
849 /* Patch the packet with our new locally generatedt id */
850 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id);
852 for (j = s->monitor->interfaces; j; j = j->interface_next)
853 if (avahi_interface_is_relevant(j) &&
855 (s->config.reflect_ipv || j->protocol == i->protocol)) {
857 if (j->protocol == AVAHI_PROTO_INET && s->fd_legacy_unicast_ipv4 >= 0) {
858 avahi_send_dns_packet_ipv4(s->fd_legacy_unicast_ipv4, j->hardware->index, p, NULL, 0);
859 } else if (j->protocol == AVAHI_PROTO_INET6 && s->fd_legacy_unicast_ipv6 >= 0)
860 avahi_send_dns_packet_ipv6(s->fd_legacy_unicast_ipv6, j->hardware->index, p, NULL, 0);
864 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->original_id);
867 static int originates_from_local_legacy_unicast_socket(AvahiServer *s, const struct sockaddr *sa) {
872 if (!s->config.enable_reflector)
875 avahi_address_from_sockaddr(sa, &a);
877 if (!avahi_address_is_local(s->monitor, &a))
880 if (sa->sa_family == AF_INET && s->fd_legacy_unicast_ipv4 >= 0) {
881 struct sockaddr_in lsa;
882 socklen_t l = sizeof(lsa);
884 if (getsockname(s->fd_legacy_unicast_ipv4, (struct sockaddr*) &lsa, &l) != 0)
885 avahi_log_warn("getsockname(): %s", strerror(errno));
887 return lsa.sin_port == ((const struct sockaddr_in*) sa)->sin_port;
891 if (sa->sa_family == AF_INET6 && s->fd_legacy_unicast_ipv6 >= 0) {
892 struct sockaddr_in6 lsa;
893 socklen_t l = sizeof(lsa);
895 if (getsockname(s->fd_legacy_unicast_ipv6, (struct sockaddr*) &lsa, &l) != 0)
896 avahi_log_warn("getsockname(): %s", strerror(errno));
898 return lsa.sin6_port == ((const struct sockaddr_in6*) sa)->sin6_port;
904 static int is_mdns_mcast_address(const AvahiAddress *a) {
908 avahi_address_parse(a->proto == AVAHI_PROTO_INET ? AVAHI_IPV4_MCAST_GROUP : AVAHI_IPV6_MCAST_GROUP, a->proto, &b);
909 return avahi_address_cmp(a, &b) == 0;
912 static int originates_from_local_iface(AvahiServer *s, AvahiIfIndex iface, const AvahiAddress *a, uint16_t port) {
914 assert(iface != AVAHI_IF_UNSPEC);
917 /* If it isn't the MDNS port it can't be generated by us */
918 if (port != AVAHI_MDNS_PORT)
921 return avahi_interface_has_address(s->monitor, iface, a);
924 static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const struct sockaddr *sa, AvahiAddress *dest, AvahiIfIndex iface, int ttl) {
928 int from_local_iface = 0;
936 if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, avahi_af_to_proto(sa->sa_family))) ||
937 !avahi_interface_is_relevant(i)) {
938 avahi_log_warn("Recieved packet from invalid interface.");
942 /* avahi_log_debug("new packet recieved on interface '%s.%i'.", i->hardware->name, i->protocol); */
944 port = avahi_port_from_sockaddr(sa);
945 avahi_address_from_sockaddr(sa, &a);
947 if (avahi_address_is_ipv4_in_ipv6(&a))
948 /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
951 if (originates_from_local_legacy_unicast_socket(s, sa))
952 /* This originates from our local reflector, so let's ignore it */
955 /* We don't want to reflect local traffic, so we check if this packet is generated locally. */
956 if (s->config.enable_reflector)
957 from_local_iface = originates_from_local_iface(s, iface, &a, port);
959 if (avahi_dns_packet_check_valid_multicast(p) < 0) {
960 avahi_log_warn("Recieved invalid packet.");
964 if (avahi_dns_packet_is_query(p)) {
965 int legacy_unicast = 0;
967 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT) != 0) {
968 avahi_log_warn("Invalid query packet.");
972 if (port != AVAHI_MDNS_PORT) {
975 if ((avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) != 0 ||
976 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0)) {
977 avahi_log_warn("Invalid legacy unicast query packet.");
985 reflect_legacy_unicast_query_packet(s, p, i, &a, port);
987 handle_query_packet(s, p, i, &a, port, legacy_unicast, from_local_iface);
989 /* avahi_log_debug("Handled query"); */
991 if (port != AVAHI_MDNS_PORT) {
992 avahi_log_warn("Recieved repsonse with invalid source port %u on interface '%s.%i'", port, i->hardware->name, i->protocol);
996 if (ttl != 255 && s->config.check_response_ttl) {
997 avahi_log_warn("Recieved response with invalid TTL %u on interface '%s.%i'.", ttl, i->hardware->name, i->protocol);
1001 if (!is_mdns_mcast_address(dest) &&
1002 !avahi_interface_address_on_link(i, &a)) {
1003 avahi_log_warn("Recivied non-local response on interface '%s.%i'.", i->hardware->name, i->protocol);
1007 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT) != 0 ||
1008 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0 ||
1009 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0) {
1010 avahi_log_warn("Invalid response packet.");
1014 handle_response_packet(s, p, i, &a, from_local_iface);
1015 /* avahi_log_debug("Handled response"); */
1019 static void dispatch_legacy_unicast_packet(AvahiServer *s, AvahiDnsPacket *p, const struct sockaddr *sa, AvahiIfIndex iface) {
1020 AvahiInterface *i, *j;
1022 AvahiLegacyUnicastReflectSlot *slot;
1029 if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, avahi_af_to_proto(sa->sa_family))) ||
1030 !avahi_interface_is_relevant(i)) {
1031 avahi_log_warn("Recieved packet from invalid interface.");
1035 /* avahi_log_debug("new legacy unicast packet recieved on interface '%s.%i'.", i->hardware->name, i->protocol); */
1037 avahi_address_from_sockaddr(sa, &a);
1039 if (avahi_address_is_ipv4_in_ipv6(&a))
1040 /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
1043 if (avahi_dns_packet_check_valid(p) < 0 || avahi_dns_packet_is_query(p)) {
1044 avahi_log_warn("Recieved invalid packet.");
1048 if (!(slot = find_slot(s, avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID)))) {
1049 avahi_log_warn("Recieved legacy unicast response with unknown id");
1053 if (!(j = avahi_interface_monitor_get_interface(s->monitor, slot->interface, slot->address.proto)) ||
1054 !avahi_interface_is_relevant(j))
1057 /* Patch the original ID into this response */
1058 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->original_id);
1060 /* Forward the response to the correct client */
1061 avahi_interface_send_packet_unicast(j, p, &slot->address, slot->port);
1063 /* Undo changes to packet */
1064 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id);
1067 static void socket_event(AvahiWatch *w, int fd, AvahiWatchEvent events, void *userdata) {
1068 AvahiServer *s = userdata;
1073 struct sockaddr_in sa;
1074 struct sockaddr_in6 sa6;
1079 if (events & AVAHI_WATCH_IN) {
1081 if (fd == s->fd_ipv4) {
1082 dest.proto = AVAHI_PROTO_INET;
1083 if ((p = avahi_recv_dns_packet_ipv4(s->fd_ipv4, &sa, &dest.data.ipv4, &iface, &ttl))) {
1084 dispatch_packet(s, p, (struct sockaddr*) &sa, &dest, iface, ttl);
1085 avahi_dns_packet_free(p);
1087 } else if (fd == s->fd_ipv6) {
1088 dest.proto = AVAHI_PROTO_INET6;
1090 if ((p = avahi_recv_dns_packet_ipv6(s->fd_ipv6, &sa6, &dest.data.ipv6, &iface, &ttl))) {
1091 dispatch_packet(s, p, (struct sockaddr*) &sa6, &dest, iface, ttl);
1092 avahi_dns_packet_free(p);
1094 } else if (fd == s->fd_legacy_unicast_ipv4) {
1095 dest.proto = AVAHI_PROTO_INET;
1097 if ((p = avahi_recv_dns_packet_ipv4(s->fd_legacy_unicast_ipv4, &sa, &dest.data.ipv4, &iface, &ttl))) {
1098 dispatch_legacy_unicast_packet(s, p, (struct sockaddr*) &sa, iface);
1099 avahi_dns_packet_free(p);
1101 } else if (fd == s->fd_legacy_unicast_ipv6) {
1102 dest.proto = AVAHI_PROTO_INET6;
1104 if ((p = avahi_recv_dns_packet_ipv6(s->fd_legacy_unicast_ipv6, &sa6, &dest.data.ipv6, &iface, &ttl))) {
1105 dispatch_legacy_unicast_packet(s, p, (struct sockaddr*) &sa6, iface);
1106 avahi_dns_packet_free(p);
1115 static void server_set_state(AvahiServer *s, AvahiServerState state) {
1118 if (s->state == state)
1124 s->callback(s, state, s->userdata);
1127 static void withdraw_host_rrs(AvahiServer *s) {
1130 if (s->hinfo_entry_group)
1131 avahi_s_entry_group_reset(s->hinfo_entry_group);
1133 if (s->browse_domain_entry_group)
1134 avahi_s_entry_group_reset(s->browse_domain_entry_group);
1136 avahi_interface_monitor_update_rrs(s->monitor, 1);
1137 s->n_host_rr_pending = 0;
1140 void avahi_server_decrease_host_rr_pending(AvahiServer *s) {
1143 assert(s->n_host_rr_pending > 0);
1145 if (--s->n_host_rr_pending == 0)
1146 server_set_state(s, AVAHI_SERVER_RUNNING);
1149 void avahi_server_increase_host_rr_pending(AvahiServer *s) {
1152 s->n_host_rr_pending ++;
1155 void avahi_host_rr_entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
1159 if (state == AVAHI_ENTRY_GROUP_REGISTERING &&
1160 s->state == AVAHI_SERVER_REGISTERING)
1161 avahi_server_increase_host_rr_pending(s);
1163 else if (state == AVAHI_ENTRY_GROUP_COLLISION &&
1164 (s->state == AVAHI_SERVER_REGISTERING || s->state == AVAHI_SERVER_RUNNING)) {
1165 withdraw_host_rrs(s);
1166 server_set_state(s, AVAHI_SERVER_COLLISION);
1168 } else if (state == AVAHI_ENTRY_GROUP_ESTABLISHED &&
1169 s->state == AVAHI_SERVER_REGISTERING)
1170 avahi_server_decrease_host_rr_pending(s);
1173 static void register_hinfo(AvahiServer *s) {
1174 struct utsname utsname;
1179 if (!s->config.publish_hinfo)
1182 if (s->hinfo_entry_group)
1183 assert(avahi_s_entry_group_is_empty(s->hinfo_entry_group));
1185 s->hinfo_entry_group = avahi_s_entry_group_new(s, avahi_host_rr_entry_group_callback, NULL);
1187 if (!s->hinfo_entry_group) {
1188 avahi_log_warn("Failed to create HINFO entry group: %s", avahi_strerror(s->error));
1192 /* Fill in HINFO rr */
1193 if ((r = avahi_record_new_full(s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO, AVAHI_DEFAULT_TTL_HOST_NAME))) {
1195 r->data.hinfo.cpu = avahi_strdup(avahi_strup(utsname.machine));
1196 r->data.hinfo.os = avahi_strdup(avahi_strup(utsname.sysname));
1198 if (avahi_server_add(s, s->hinfo_entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_UNIQUE, r) < 0) {
1199 avahi_log_warn("Failed to add HINFO RR: %s", avahi_strerror(s->error));
1203 avahi_record_unref(r);
1206 if (avahi_s_entry_group_commit(s->hinfo_entry_group) < 0)
1207 avahi_log_warn("Failed to commit HINFO entry group: %s", avahi_strerror(s->error));
1211 static void register_localhost(AvahiServer *s) {
1215 /* Add localhost entries */
1216 avahi_address_parse("127.0.0.1", AVAHI_PROTO_INET, &a);
1217 avahi_server_add_address(s, NULL, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_NO_ANNOUNCE, "localhost", &a);
1219 avahi_address_parse("::1", AVAHI_PROTO_INET6, &a);
1220 avahi_server_add_address(s, NULL, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_NO_ANNOUNCE, "ip6-localhost", &a);
1223 static void register_browse_domain(AvahiServer *s) {
1226 if (!s->config.publish_domain)
1229 if (s->browse_domain_entry_group)
1230 assert(avahi_s_entry_group_is_empty(s->browse_domain_entry_group));
1232 s->browse_domain_entry_group = avahi_s_entry_group_new(s, NULL, NULL);
1234 if (!s->browse_domain_entry_group) {
1235 avahi_log_warn("Failed to create browse domain entry group: %s", avahi_strerror(s->error));
1239 if (avahi_server_add_ptr(s, s->browse_domain_entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, AVAHI_DEFAULT_TTL, "b._dns-sd._udp.local", s->domain_name) < 0) {
1240 avahi_log_warn("Failed to add browse domain RR: %s", avahi_strerror(s->error));
1244 if (avahi_s_entry_group_commit(s->browse_domain_entry_group) < 0)
1245 avahi_log_warn("Failed to commit browse domain entry group: %s", avahi_strerror(s->error));
1248 static void register_stuff(AvahiServer *s) {
1251 server_set_state(s, AVAHI_SERVER_REGISTERING);
1252 s->n_host_rr_pending ++; /** Make sure that the state isn't changed tp AVAHI_SERVER_RUNNING too early */
1255 register_browse_domain(s);
1256 avahi_interface_monitor_update_rrs(s->monitor, 0);
1258 s->n_host_rr_pending --;
1260 if (s->n_host_rr_pending == 0)
1261 server_set_state(s, AVAHI_SERVER_RUNNING);
1264 static void update_fqdn(AvahiServer *s) {
1268 assert(s->host_name);
1269 assert(s->domain_name);
1271 if (!(n = avahi_strdup_printf("%s.%s", s->host_name, s->domain_name)))
1274 avahi_free(s->host_name_fqdn);
1275 s->host_name_fqdn = n;
1278 int avahi_server_set_host_name(AvahiServer *s, const char *host_name) {
1282 if (host_name && !avahi_is_valid_host_name(host_name))
1283 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
1285 withdraw_host_rrs(s);
1287 avahi_free(s->host_name);
1288 s->host_name = host_name ? avahi_normalize_name_strdup(host_name) : avahi_get_host_name_strdup();
1289 s->host_name[strcspn(s->host_name, ".")] = 0;
1296 int avahi_server_set_domain_name(AvahiServer *s, const char *domain_name) {
1298 assert(domain_name);
1300 if (domain_name && !avahi_is_valid_domain_name(domain_name))
1301 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
1303 withdraw_host_rrs(s);
1305 avahi_free(s->domain_name);
1306 s->domain_name = domain_name ? avahi_normalize_name_strdup(domain_name) : avahi_strdup("local");
1313 static int valid_server_config(const AvahiServerConfig *sc) {
1315 if (sc->host_name && !avahi_is_valid_host_name(sc->host_name))
1316 return AVAHI_ERR_INVALID_HOST_NAME;
1318 if (sc->domain_name && !avahi_is_valid_domain_name(sc->domain_name))
1319 return AVAHI_ERR_INVALID_DOMAIN_NAME;
1324 static int setup_sockets(AvahiServer *s) {
1327 s->fd_ipv4 = s->config.use_ipv4 ? avahi_open_socket_ipv4(s->config.disallow_other_stacks) : -1;
1328 s->fd_ipv6 = s->config.use_ipv6 ? avahi_open_socket_ipv6(s->config.disallow_other_stacks) : -1;
1330 if (s->fd_ipv6 < 0 && s->fd_ipv4 < 0)
1331 return AVAHI_ERR_NO_NETWORK;
1333 if (s->fd_ipv4 < 0 && s->config.use_ipv4)
1334 avahi_log_notice("Failed to create IPv4 socket, proceeding in IPv6 only mode");
1335 else if (s->fd_ipv6 < 0 && s->config.use_ipv6)
1336 avahi_log_notice("Failed to create IPv6 socket, proceeding in IPv4 only mode");
1338 s->fd_legacy_unicast_ipv4 = s->fd_ipv4 >= 0 && s->config.enable_reflector ? avahi_open_unicast_socket_ipv4() : -1;
1339 s->fd_legacy_unicast_ipv6 = s->fd_ipv6 >= 0 && s->config.enable_reflector ? avahi_open_unicast_socket_ipv6() : -1;
1343 s->watch_legacy_unicast_ipv4 =
1344 s->watch_legacy_unicast_ipv6 = NULL;
1346 if (s->fd_ipv4 >= 0)
1347 s->watch_ipv4 = s->poll_api->watch_new(s->poll_api, s->fd_ipv4, AVAHI_WATCH_IN, socket_event, s);
1348 if (s->fd_ipv6 >= 0)
1349 s->watch_ipv6 = s->poll_api->watch_new(s->poll_api, s->fd_ipv6, AVAHI_WATCH_IN, socket_event, s);
1351 if (s->fd_legacy_unicast_ipv4 >= 0)
1352 s->watch_legacy_unicast_ipv4 = s->poll_api->watch_new(s->poll_api, s->fd_legacy_unicast_ipv4, AVAHI_WATCH_IN, socket_event, s);
1353 if (s->fd_legacy_unicast_ipv6 >= 0)
1354 s->watch_legacy_unicast_ipv6 = s->poll_api->watch_new(s->poll_api, s->fd_legacy_unicast_ipv6, AVAHI_WATCH_IN, socket_event, s);
1359 AvahiServer *avahi_server_new(const AvahiPoll *poll_api, const AvahiServerConfig *sc, AvahiServerCallback callback, void* userdata, int *error) {
1363 if (sc && (e = valid_server_config(sc)) < 0) {
1369 if (!(s = avahi_new(AvahiServer, 1))) {
1371 *error = AVAHI_ERR_NO_MEMORY;
1376 s->poll_api = poll_api;
1379 avahi_server_config_copy(&s->config, sc);
1381 avahi_server_config_init(&s->config);
1383 if ((e = setup_sockets(s)) < 0) {
1387 avahi_server_config_free(&s->config);
1394 s->n_host_rr_pending = 0;
1395 s->need_entry_cleanup = 0;
1396 s->need_group_cleanup = 0;
1397 s->need_browser_cleanup = 0;
1399 s->time_event_queue = avahi_time_event_queue_new(poll_api);
1401 s->callback = callback;
1402 s->userdata = userdata;
1404 s->entries_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL);
1405 AVAHI_LLIST_HEAD_INIT(AvahiEntry, s->entries);
1406 AVAHI_LLIST_HEAD_INIT(AvahiGroup, s->groups);
1408 s->record_browser_hashmap = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL);
1409 AVAHI_LLIST_HEAD_INIT(AvahiSRecordBrowser, s->record_browsers);
1410 AVAHI_LLIST_HEAD_INIT(AvahiSHostNameResolver, s->host_name_resolvers);
1411 AVAHI_LLIST_HEAD_INIT(AvahiSAddressResolver, s->address_resolvers);
1412 AVAHI_LLIST_HEAD_INIT(AvahiSDomainBrowser, s->domain_browsers);
1413 AVAHI_LLIST_HEAD_INIT(AvahiSServiceTypeBrowser, s->service_type_browsers);
1414 AVAHI_LLIST_HEAD_INIT(AvahiSServiceBrowser, s->service_browsers);
1415 AVAHI_LLIST_HEAD_INIT(AvahiSServiceResolver, s->service_resolvers);
1416 AVAHI_LLIST_HEAD_INIT(AvahiSDNSServerBrowser, s->dns_server_browsers);
1418 s->legacy_unicast_reflect_slots = NULL;
1419 s->legacy_unicast_reflect_id = 0;
1421 if (s->config.enable_wide_area) {
1422 s->wide_area_lookup_engine = avahi_wide_area_engine_new(s);
1423 avahi_wide_area_set_servers(s->wide_area_lookup_engine, s->config.wide_area_servers, s->config.n_wide_area_servers);
1425 s->wide_area_lookup_engine = NULL;
1427 s->multicast_lookup_engine = avahi_multicast_lookup_engine_new(s);
1430 s->local_service_cookie = (uint32_t) rand() * (uint32_t) rand();
1431 } while (s->local_service_cookie == AVAHI_SERVICE_COOKIE_INVALID);
1434 s->host_name = s->config.host_name ? avahi_normalize_name_strdup(s->config.host_name) : avahi_get_host_name_strdup();
1435 s->host_name[strcspn(s->host_name, ".")] = 0;
1436 s->domain_name = s->config.domain_name ? avahi_normalize_name_strdup(s->config.domain_name) : avahi_strdup("local");
1437 s->host_name_fqdn = NULL;
1440 s->record_list = avahi_record_list_new();
1442 s->state = AVAHI_SERVER_INVALID;
1444 s->monitor = avahi_interface_monitor_new(s);
1445 avahi_interface_monitor_sync(s->monitor);
1447 register_localhost(s);
1449 s->hinfo_entry_group = NULL;
1450 s->browse_domain_entry_group = NULL;
1453 s->error = AVAHI_OK;
1458 void avahi_server_free(AvahiServer* s) {
1461 /* Remove all browsers */
1463 while (s->dns_server_browsers)
1464 avahi_s_dns_server_browser_free(s->dns_server_browsers);
1465 while (s->host_name_resolvers)
1466 avahi_s_host_name_resolver_free(s->host_name_resolvers);
1467 while (s->address_resolvers)
1468 avahi_s_address_resolver_free(s->address_resolvers);
1469 while (s->domain_browsers)
1470 avahi_s_domain_browser_free(s->domain_browsers);
1471 while (s->service_type_browsers)
1472 avahi_s_service_type_browser_free(s->service_type_browsers);
1473 while (s->service_browsers)
1474 avahi_s_service_browser_free(s->service_browsers);
1475 while (s->service_resolvers)
1476 avahi_s_service_resolver_free(s->service_resolvers);
1477 while (s->record_browsers)
1478 avahi_s_record_browser_destroy(s->record_browsers);
1480 /* Remove all locally rgeistered stuff */
1483 free_entry(s, s->entries);
1485 avahi_interface_monitor_free(s->monitor);
1488 free_group(s, s->groups);
1492 avahi_hashmap_free(s->entries_by_key);
1493 avahi_record_list_free(s->record_list);
1494 avahi_hashmap_free(s->record_browser_hashmap);
1496 if (s->wide_area_lookup_engine)
1497 avahi_wide_area_engine_free(s->wide_area_lookup_engine);
1498 avahi_multicast_lookup_engine_free(s->multicast_lookup_engine);
1500 avahi_time_event_queue_free(s->time_event_queue);
1505 s->poll_api->watch_free(s->watch_ipv4);
1507 s->poll_api->watch_free(s->watch_ipv6);
1509 if (s->watch_legacy_unicast_ipv4)
1510 s->poll_api->watch_free(s->watch_legacy_unicast_ipv4);
1511 if (s->watch_legacy_unicast_ipv6)
1512 s->poll_api->watch_free(s->watch_legacy_unicast_ipv6);
1516 if (s->fd_ipv4 >= 0)
1518 if (s->fd_ipv6 >= 0)
1521 if (s->fd_legacy_unicast_ipv4 >= 0)
1522 close(s->fd_legacy_unicast_ipv4);
1523 if (s->fd_legacy_unicast_ipv6 >= 0)
1524 close(s->fd_legacy_unicast_ipv6);
1526 /* Free other stuff */
1528 avahi_free(s->host_name);
1529 avahi_free(s->domain_name);
1530 avahi_free(s->host_name_fqdn);
1532 avahi_server_config_free(&s->config);
1537 static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
1543 for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
1547 if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
1550 if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
1553 if ((interface <= 0 ||
1554 e->interface <= 0 ||
1555 e->interface == interface) &&
1556 (protocol == AVAHI_PROTO_UNSPEC ||
1557 e->protocol == AVAHI_PROTO_UNSPEC ||
1558 e->protocol == protocol))
1566 int avahi_server_add(
1568 AvahiSEntryGroup *g,
1569 AvahiIfIndex interface,
1570 AvahiProtocol protocol,
1571 AvahiPublishFlags flags,
1579 if (!AVAHI_IF_VALID(interface))
1580 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
1582 if (!AVAHI_PROTO_VALID(protocol))
1583 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
1585 if (!AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_UNIQUE|AVAHI_PUBLISH_ALLOW_MULTIPLE|AVAHI_PUBLISH_IS_PROXY))
1586 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
1588 if (!avahi_is_valid_domain_name(r->key->name))
1589 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
1592 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_TTL);
1594 if (avahi_key_is_pattern(r->key))
1595 return avahi_server_set_errno(s, AVAHI_ERR_IS_PATTERN);
1597 if (!avahi_record_is_valid(r))
1598 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_RECORD);
1600 if (check_record_conflict(s, interface, protocol, r, flags) < 0)
1601 return avahi_server_set_errno(s, AVAHI_ERR_LOCAL_COLLISION);
1603 if (!(e = avahi_new(AvahiEntry, 1)))
1604 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1607 e->record = avahi_record_ref(r);
1609 e->interface = interface;
1610 e->protocol = protocol;
1614 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, e->announcements);
1616 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
1618 /* Insert into hash table indexed by name */
1619 t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
1620 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
1621 avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
1623 /* Insert into group list */
1625 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
1627 avahi_announce_entry(s, e);
1632 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
1633 AvahiEntry **e = (AvahiEntry**) state;
1638 *e = g ? g->entries : s->entries;
1640 while (*e && (*e)->dead)
1641 *e = g ? (*e)->by_group_next : (*e)->entries_next;
1646 return avahi_record_ref((*e)->record);
1649 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
1655 callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
1657 for (e = s->entries; e; e = e->entries_next) {
1664 if (!(t = avahi_record_to_string(e->record)))
1665 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1667 snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
1670 callback(ln, userdata);
1673 avahi_dump_caches(s->monitor, callback, userdata);
1675 if (s->wide_area_lookup_engine)
1676 avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
1680 int avahi_server_add_ptr(
1682 AvahiSEntryGroup *g,
1683 AvahiIfIndex interface,
1684 AvahiProtocol protocol,
1685 AvahiPublishFlags flags,
1696 if ((name && !avahi_is_valid_domain_name(name)) || !avahi_is_valid_domain_name(dest))
1697 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
1700 name = s->host_name_fqdn;
1702 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl)))
1703 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1705 r->data.ptr.name = avahi_normalize_name_strdup(dest);
1706 ret = avahi_server_add(s, g, interface, protocol, flags, r);
1707 avahi_record_unref(r);
1711 int avahi_server_add_address(
1713 AvahiSEntryGroup *g,
1714 AvahiIfIndex interface,
1715 AvahiProtocol protocol,
1716 AvahiPublishFlags flags,
1726 if (!AVAHI_IF_VALID(interface))
1727 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
1729 if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(a->proto))
1730 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
1732 if (!AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_REVERSE|AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE))
1733 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
1735 if (name && !avahi_is_valid_domain_name(name))
1736 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
1739 name = s->host_name_fqdn;
1741 if (!(n = avahi_normalize_name_strdup(name)))
1742 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1747 if (a->proto == AVAHI_PROTO_INET) {
1750 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
1751 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1755 r->data.a.address = a->data.ipv4;
1756 ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
1757 avahi_record_unref(r);
1762 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
1765 if (!(reverse = avahi_reverse_lookup_name_ipv4(&a->data.ipv4))) {
1766 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1770 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
1771 avahi_free(reverse);
1777 assert(a->proto == AVAHI_PROTO_INET6);
1779 if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
1780 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1784 r->data.aaaa.address = a->data.ipv6;
1785 ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
1786 avahi_record_unref(r);
1791 if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
1794 if (!(reverse = avahi_reverse_lookup_name_ipv6_arpa(&a->data.ipv6))) {
1795 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1799 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
1800 avahi_free(reverse);
1805 if (!(reverse = avahi_reverse_lookup_name_ipv6_int(&a->data.ipv6))) {
1806 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1810 ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name);
1811 avahi_free(reverse);
1822 static int server_add_txt_strlst_nocopy(
1824 AvahiSEntryGroup *g,
1825 AvahiIfIndex interface,
1826 AvahiProtocol protocol,
1827 AvahiPublishFlags flags,
1830 AvahiStringList *strlst) {
1837 if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
1838 avahi_string_list_free(strlst);
1839 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1842 r->data.txt.string_list = strlst;
1843 ret = avahi_server_add(s, g, interface, protocol, flags, r);
1844 avahi_record_unref(r);
1849 int avahi_server_add_txt_strlst(
1851 AvahiSEntryGroup *g,
1852 AvahiIfIndex interface,
1853 AvahiProtocol protocol,
1854 AvahiPublishFlags flags,
1857 AvahiStringList *strlst) {
1861 return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_copy(strlst));
1864 int avahi_server_add_txt_va(
1866 AvahiSEntryGroup *g,
1867 AvahiIfIndex interface,
1868 AvahiProtocol protocol,
1869 AvahiPublishFlags flags,
1876 return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_new_va(va));
1879 int avahi_server_add_txt(
1881 AvahiSEntryGroup *g,
1882 AvahiIfIndex interface,
1883 AvahiProtocol protocol,
1884 AvahiPublishFlags flags,
1895 ret = avahi_server_add_txt_va(s, g, interface, protocol, flags, ttl, name, va);
1901 static AvahiStringList *add_magic_cookie(
1903 AvahiStringList *strlst) {
1907 if (!s->config.add_service_cookie)
1910 if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
1911 /* This string list already contains a magic cookie */
1914 return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
1917 static int server_add_service_strlst_nocopy(
1919 AvahiSEntryGroup *g,
1920 AvahiIfIndex interface,
1921 AvahiProtocol protocol,
1922 AvahiPublishFlags flags,
1928 AvahiStringList *strlst) {
1930 char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
1931 AvahiRecord *r = NULL;
1938 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
1939 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
1940 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_IS_PROXY), AVAHI_ERR_INVALID_FLAGS);
1941 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
1942 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
1943 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
1944 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME);
1947 domain = s->domain_name;
1950 host = s->host_name_fqdn;
1952 if (!(h = avahi_normalize_name_strdup(host))) {
1953 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1957 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
1958 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
1959 (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
1960 avahi_server_set_errno(s, ret);
1964 /* Add service enumeration PTR record */
1966 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
1969 /* Add SRV record */
1971 if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
1972 ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1976 r->data.srv.priority = 0;
1977 r->data.srv.weight = 0;
1978 r->data.srv.port = port;
1979 r->data.srv.name = h;
1981 ret = avahi_server_add(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, r);
1982 avahi_record_unref(r);
1987 /* Add TXT record */
1989 if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
1990 strlst = add_magic_cookie(s, strlst);
1992 ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
1998 /* Add service type enumeration record */
2000 ret = avahi_server_add_ptr(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY), AVAHI_DEFAULT_TTL, enum_ptr, ptr_name);
2004 avahi_string_list_free(strlst);
2010 int avahi_server_add_service_strlst(
2012 AvahiSEntryGroup *g,
2013 AvahiIfIndex interface,
2014 AvahiProtocol protocol,
2015 AvahiPublishFlags flags,
2021 AvahiStringList *strlst) {
2027 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
2030 int avahi_server_add_service_va(
2032 AvahiSEntryGroup *g,
2033 AvahiIfIndex interface,
2034 AvahiProtocol protocol,
2035 AvahiPublishFlags flags,
2047 return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
2050 int avahi_server_add_service(
2052 AvahiSEntryGroup *g,
2053 AvahiIfIndex interface,
2054 AvahiProtocol protocol,
2055 AvahiPublishFlags flags,
2071 ret = avahi_server_add_service_va(s, g, interface, protocol, flags, name, type, domain, host, port, va);
2077 int avahi_server_add_service_subtype(
2079 AvahiSEntryGroup *g,
2080 AvahiIfIndex interface,
2081 AvahiProtocol protocol,
2082 AvahiPublishFlags flags,
2086 const char *subtype) {
2089 char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
2095 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
2096 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
2097 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS);
2098 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
2099 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
2100 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
2101 AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
2104 domain = s->domain_name;
2106 if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
2107 (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
2108 avahi_server_set_errno(s, ret);
2112 if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
2120 static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
2121 static const char hex[] = "0123456789abcdef";
2123 const uint8_t *k = p;
2125 while (sl > 1 && pl > 0) {
2126 *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
2142 int avahi_server_add_dns_server_address(
2144 AvahiSEntryGroup *g,
2145 AvahiIfIndex interface,
2146 AvahiProtocol protocol,
2147 AvahiPublishFlags flags,
2149 AvahiDNSServerType type,
2150 const AvahiAddress *address,
2151 uint16_t port /** should be 53 */) {
2160 if (!AVAHI_IF_VALID(interface))
2161 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
2163 if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto))
2164 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
2166 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
2167 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
2170 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
2172 if (domain && !avahi_is_valid_domain_name(domain))
2173 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
2176 domain = s->domain_name;
2178 if (address->proto == AVAHI_PROTO_INET) {
2179 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
2180 snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
2181 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
2182 r->data.a.address = address->data.ipv4;
2184 hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
2185 snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
2186 r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
2187 r->data.aaaa.address = address->data.ipv6;
2191 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
2193 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
2194 avahi_record_unref(r);
2199 return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port);
2202 int avahi_server_add_dns_server_name(
2204 AvahiSEntryGroup *g,
2205 AvahiIfIndex interface,
2206 AvahiProtocol protocol,
2207 AvahiPublishFlags flags,
2209 AvahiDNSServerType type,
2211 uint16_t port /** should be 53 */) {
2214 char t[256], *d = NULL, *n = NULL;
2220 if (!AVAHI_IF_VALID(interface))
2221 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
2223 if (!AVAHI_PROTO_VALID(protocol))
2224 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
2226 if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
2227 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
2230 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
2232 if (!avahi_is_valid_domain_name(name))
2233 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME);
2235 if (domain && !avahi_is_valid_domain_name(domain))
2236 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
2239 domain = s->domain_name;
2241 if (!(n = avahi_normalize_name_strdup(name)) ||
2242 !(d = avahi_normalize_name_strdup(domain))) {
2245 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
2248 snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", d);
2251 if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
2253 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
2256 r->data.srv.priority = 0;
2257 r->data.srv.weight = 0;
2258 r->data.srv.port = port;
2259 r->data.srv.name = n;
2260 ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_NULL, r);
2261 avahi_record_unref(r);
2266 static void post_query_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
2267 AvahiKey *k = userdata;
2273 avahi_interface_post_query(i, k, 0);
2276 void avahi_server_post_query(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiKey *key) {
2280 avahi_interface_monitor_walk(s->monitor, interface, protocol, post_query_callback, key);
2283 void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
2286 if (g->state == state)
2289 assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
2291 if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
2293 /* If the entry group was established for a time longer then
2294 * 5s, reset the establishment trial counter */
2296 if (avahi_age(&g->established_at) > 5000000)
2297 g->n_register_try = 0;
2300 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
2302 /* If the entry group is now established, remember the time
2305 gettimeofday(&g->established_at, NULL);
2310 g->callback(g->server, g, state, g->userdata);
2313 AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
2314 AvahiSEntryGroup *g;
2318 if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
2319 avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
2324 g->callback = callback;
2325 g->userdata = userdata;
2327 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
2329 g->n_register_try = 0;
2330 g->register_time_event = NULL;
2331 g->register_time.tv_sec = 0;
2332 g->register_time.tv_usec = 0;
2333 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
2335 AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
2339 void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
2345 for (e = g->entries; e; e = e->by_group_next) {
2347 avahi_goodbye_entry(g->server, e, 1);
2352 if (g->register_time_event) {
2353 avahi_time_event_free(g->register_time_event);
2354 g->register_time_event = NULL;
2359 g->server->need_group_cleanup = 1;
2360 g->server->need_entry_cleanup = 1;
2363 static void entry_group_commit_real(AvahiSEntryGroup *g) {
2366 gettimeofday(&g->register_time, NULL);
2368 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
2371 avahi_announce_group(g->server, g);
2372 avahi_s_entry_group_check_probed(g, 0);
2376 static void entry_group_register_time_event_callback(AvahiTimeEvent *e, void* userdata) {
2377 AvahiSEntryGroup *g = userdata;
2380 /* avahi_log_debug("Holdoff passed, waking up and going on."); */
2382 avahi_time_event_free(g->register_time_event);
2383 g->register_time_event = NULL;
2385 /* Holdoff time passed, so let's start probing */
2386 entry_group_commit_real(g);
2389 int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
2395 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
2396 return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
2398 g->n_register_try++;
2400 avahi_timeval_add(&g->register_time,
2401 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
2402 AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
2403 AVAHI_RR_HOLDOFF_MSEC));
2405 gettimeofday(&now, NULL);
2407 if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
2408 /* Holdoff time passed, so let's start probing */
2409 /* avahi_log_debug("Holdoff passed, directly going on."); */
2411 entry_group_commit_real(g);
2413 /* avahi_log_debug("Holdoff not passed, sleeping."); */
2415 /* Holdoff time has not yet passed, so let's wait */
2416 assert(!g->register_time_event);
2417 g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
2419 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
2425 void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
2429 for (e = g->entries; e; e = e->by_group_next) {
2431 avahi_goodbye_entry(g->server, e, 1);
2435 g->server->need_entry_cleanup = 1;
2437 if (g->register_time_event) {
2438 avahi_time_event_free(g->register_time_event);
2439 g->register_time_event = NULL;
2444 gettimeofday(&g->register_time, NULL);
2446 avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
2449 int avahi_entry_is_commited(AvahiEntry *e) {
2454 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
2455 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
2458 AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
2465 void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
2468 g->userdata = userdata;
2471 void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
2477 int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
2481 /* Look for an entry that is not dead */
2482 for (e = g->entries; e; e = e->by_group_next)
2489 const char* avahi_server_get_domain_name(AvahiServer *s) {
2492 return s->domain_name;
2495 const char* avahi_server_get_host_name(AvahiServer *s) {
2498 return s->host_name;
2501 const char* avahi_server_get_host_name_fqdn(AvahiServer *s) {
2504 return s->host_name_fqdn;
2507 void* avahi_server_get_data(AvahiServer *s) {
2513 void avahi_server_set_data(AvahiServer *s, void* userdata) {
2516 s->userdata = userdata;
2519 AvahiServerState avahi_server_get_state(AvahiServer *s) {
2525 AvahiServerConfig* avahi_server_config_init(AvahiServerConfig *c) {
2528 memset(c, 0, sizeof(AvahiServerConfig));
2531 c->host_name = NULL;
2532 c->domain_name = NULL;
2533 c->check_response_ttl = 0;
2534 c->publish_hinfo = 1;
2535 c->publish_addresses = 1;
2536 c->publish_workstation = 1;
2537 c->publish_domain = 1;
2538 c->use_iff_running = 0;
2539 c->enable_reflector = 0;
2541 c->add_service_cookie = 1;
2542 c->enable_wide_area = 0;
2543 c->n_wide_area_servers = 0;
2544 c->disallow_other_stacks = 0;
2549 void avahi_server_config_free(AvahiServerConfig *c) {
2552 avahi_free(c->host_name);
2553 avahi_free(c->domain_name);
2556 AvahiServerConfig* avahi_server_config_copy(AvahiServerConfig *ret, const AvahiServerConfig *c) {
2557 char *d = NULL, *h = NULL;
2562 if (!(h = avahi_strdup(c->host_name)))
2566 if (!(d = avahi_strdup(c->domain_name))) {
2573 ret->domain_name = d;
2578 int avahi_server_errno(AvahiServer *s) {
2584 /* Just for internal use */
2585 int avahi_server_set_errno(AvahiServer *s, int error) {
2588 return s->error = error;
2591 uint32_t avahi_server_get_local_service_cookie(AvahiServer *s) {
2594 return s->local_service_cookie;
2597 int avahi_server_is_service_local(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char*domain) {
2598 AvahiKey *key = NULL;
2608 if (!avahi_is_valid_service_name(name))
2609 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_SERVICE_NAME);
2611 if (!avahi_is_valid_service_type_strict(type))
2612 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_SERVICE_TYPE);
2614 if (domain && !avahi_is_valid_domain_name(domain))
2615 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
2617 if ((ret = avahi_service_name_join(n, sizeof(n), name, type, domain) < 0))
2618 return avahi_server_set_errno(s, ret);
2620 if (!(key = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV)))
2621 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
2625 for (e = avahi_hashmap_lookup(s->entries_by_key, key); e; e = e->by_key_next) {
2627 if ((e->interface == interface || e->interface <= 0 || interface <= 0) &&
2628 (e->protocol == protocol || e->protocol == AVAHI_PROTO_UNSPEC || protocol == AVAHI_PROTO_UNSPEC) &&
2629 !(e->flags & AVAHI_PUBLISH_IS_PROXY)) {
2635 avahi_key_unref(key);
2640 /** Set the wide area DNS servers */
2641 int avahi_server_set_wide_area_servers(AvahiServer *s, const AvahiAddress *a, unsigned n) {
2644 if (!s->wide_area_lookup_engine)
2645 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_CONFIG);
2647 avahi_wide_area_set_servers(s->wide_area_lookup_engine, a, n);