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/types.h>
27 #include <sys/socket.h>
28 #include <netinet/in.h>
29 #include <arpa/inet.h>
31 #include <sys/utsname.h>
38 #include <avahi-common/domain.h>
39 #include <avahi-common/timeval.h>
40 #include <avahi-common/malloc.h>
41 #include <avahi-common/error.h>
49 #include "dns-srv-rr.h"
50 #include "addr-util.h"
51 #include "domain-util.h"
54 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) {
60 if (type == AVAHI_DNS_TYPE_ANY) {
63 for (e = s->entries; e; e = e->entries_next)
65 avahi_entry_is_registered(s, e, i) &&
66 e->record->key->clazz == AVAHI_DNS_CLASS_IN &&
67 avahi_domain_equal(name, e->record->key->name))
68 callback(s, e->record, e->flags & AVAHI_PUBLISH_UNIQUE, userdata);
74 if (!(k = avahi_key_new(name, AVAHI_DNS_CLASS_IN, type)))
77 for (e = avahi_hashmap_lookup(s->entries_by_key, k); e; e = e->by_key_next)
78 if (!e->dead && avahi_entry_is_registered(s, e, i))
79 callback(s, e->record, e->flags & AVAHI_PUBLISH_UNIQUE, userdata);
85 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) {
91 /* Call the specified callback far all records referenced by the one specified in *r */
93 if (r->key->clazz == AVAHI_DNS_CLASS_IN) {
94 if (r->key->type == AVAHI_DNS_TYPE_PTR) {
95 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_SRV, callback, userdata);
96 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_TXT, callback, userdata);
97 } else if (r->key->type == AVAHI_DNS_TYPE_SRV) {
98 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_A, callback, userdata);
99 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_AAAA, callback, userdata);
100 } else if (r->key->type == AVAHI_DNS_TYPE_CNAME)
101 enum_aux_records(s, i, r->data.cname.name, AVAHI_DNS_TYPE_ANY, callback, userdata);
105 void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry *e, int unicast_response, int auxiliary) {
110 avahi_record_list_push(s->record_list, e->record, e->flags & AVAHI_PUBLISH_UNIQUE, unicast_response, auxiliary);
113 void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, int unicast_response) {
118 /* Push all records that match the specified key to the record list */
120 if (avahi_key_is_pattern(k)) {
123 /* Handle ANY query */
125 for (e = s->entries; e; e = e->entries_next)
126 if (!e->dead && avahi_key_pattern_match(k, e->record->key) && avahi_entry_is_registered(s, e, i))
127 avahi_server_prepare_response(s, i, e, unicast_response, 0);
132 /* Handle all other queries */
134 for (e = avahi_hashmap_lookup(s->entries_by_key, k); e; e = e->by_key_next)
135 if (!e->dead && avahi_entry_is_registered(s, e, i))
136 avahi_server_prepare_response(s, i, e, unicast_response, 0);
139 /* Look for CNAME records */
141 if ((k->clazz == AVAHI_DNS_CLASS_IN || k->clazz == AVAHI_DNS_CLASS_ANY)
142 && k->type != AVAHI_DNS_TYPE_CNAME && k->type != AVAHI_DNS_TYPE_ANY) {
146 if (!(cname_key = avahi_key_new(k->name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_CNAME)))
149 avahi_server_prepare_matching_responses(s, i, cname_key, unicast_response);
150 avahi_key_unref(cname_key);
154 static void withdraw_entry(AvahiServer *s, AvahiEntry *e) {
158 /* Withdraw the specified entry, and if is part of an entry group,
159 * put that into COLLISION state */
167 for (k = e->group->entries; k; k = k->by_group_next)
169 avahi_goodbye_entry(s, k, 0, 1);
173 e->group->n_probing = 0;
175 avahi_s_entry_group_change_state(e->group, AVAHI_ENTRY_GROUP_COLLISION);
177 avahi_goodbye_entry(s, e, 0, 1);
181 s->need_entry_cleanup = 1;
184 static void withdraw_rrset(AvahiServer *s, AvahiKey *key) {
190 /* Withdraw an entry RRSset */
192 for (e = avahi_hashmap_lookup(s->entries_by_key, key); e; e = e->by_key_next)
193 withdraw_entry(s, e);
196 static void incoming_probe(AvahiServer *s, AvahiRecord *record, AvahiInterface *i) {
198 int ours = 0, won = 0, lost = 0;
204 /* Handle incoming probes and check if they conflict our own probes */
206 for (e = avahi_hashmap_lookup(s->entries_by_key, record->key); e; e = n) {
213 if ((cmp = avahi_record_lexicographical_compare(e->record, record)) == 0) {
218 if (avahi_entry_is_probing(s, e, i)) {
228 char *t = avahi_record_to_string(record);
231 avahi_log_debug("Received conflicting probe [%s]. Local host won.", t);
233 avahi_log_debug("Received conflicting probe [%s]. Local host lost. Withdrawing.", t);
234 withdraw_rrset(s, record->key);
241 static int handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord *record, int unique) {
242 int valid = 1, ours = 0, conflict = 0, withdraw_immediately = 0;
243 AvahiEntry *e, *n, *conflicting_entry = NULL;
249 /* Check whether an incoming record conflicts with one of our own */
251 for (e = avahi_hashmap_lookup(s->entries_by_key, record->key); e; e = n) {
257 /* Check if the incoming is a goodbye record */
258 if (avahi_record_is_goodbye(record)) {
260 if (avahi_record_equal_no_ttl(e->record, record)) {
264 t = avahi_record_to_string(record);
265 avahi_log_debug("Received goodbye record for one of our records [%s]. Refreshing.", t);
266 avahi_server_prepare_matching_responses(s, i, e->record->key, 0);
273 /* If the goodybe packet doesn't match one of our own RRs, we simply ignore it. */
277 if (!(e->flags & AVAHI_PUBLISH_UNIQUE) && !unique)
280 /* Either our entry or the other is intended to be unique, so let's check */
282 if (avahi_record_equal_no_ttl(e->record, record)) {
283 ours = 1; /* We have an identical record, so this is no conflict */
285 /* Check wheter there is a TTL conflict */
286 if (record->ttl <= e->record->ttl/2 &&
287 avahi_entry_is_registered(s, e, i)) {
290 t = avahi_record_to_string(record);
292 avahi_log_debug("Received record with bad TTL [%s]. Refreshing.", t);
293 avahi_server_prepare_matching_responses(s, i, e->record->key, 0);
299 /* There's no need to check the other entries of this RRset */
304 if (avahi_entry_is_registered(s, e, i)) {
306 /* A conflict => we have to return to probe mode */
308 conflicting_entry = e;
310 } else if (avahi_entry_is_probing(s, e, i)) {
312 /* We are currently registering a matching record, but
313 * someone else already claimed it, so let's
316 withdraw_immediately = 1;
321 if (!ours && conflict) {
326 t = avahi_record_to_string(record);
328 if (withdraw_immediately) {
329 avahi_log_debug("Received conflicting record [%s] with local record to be. Withdrawing.", t);
330 withdraw_rrset(s, record->key);
332 assert(conflicting_entry);
333 avahi_log_debug("Received conflicting record [%s]. Resetting our record.", t);
334 avahi_entry_return_to_initial_state(s, conflicting_entry, i);
336 /* Local unique records are returned to probing
337 * state. Local shared records are reannounced. */
346 static void append_aux_callback(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata) {
347 int *unicast_response = userdata;
351 assert(unicast_response);
353 avahi_record_list_push(s->record_list, r, flush_cache, *unicast_response, 1);
356 static void append_aux_records_to_list(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, int unicast_response) {
360 avahi_server_enumerate_aux_records(s, i, r, append_aux_callback, &unicast_response);
363 void avahi_server_generate_response(AvahiServer *s, AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port, int legacy_unicast, int immediately) {
367 assert(!legacy_unicast || (a && port > 0 && p));
369 if (legacy_unicast) {
370 AvahiDnsPacket *reply;
373 if (!(reply = avahi_dns_packet_new_reply(p, 512 + AVAHI_DNS_PACKET_EXTRA_SIZE /* unicast DNS maximum packet size is 512 */ , 1, 1)))
376 while ((r = avahi_record_list_next(s->record_list, NULL, NULL, NULL))) {
378 append_aux_records_to_list(s, i, r, 0);
380 if (avahi_dns_packet_append_record(reply, r, 0, 10))
381 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
383 char *t = avahi_record_to_string(r);
384 avahi_log_warn("Record [%s] not fitting in legacy unicast packet, dropping.", t);
388 avahi_record_unref(r);
391 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
392 avahi_interface_send_packet_unicast(i, reply, a, port);
394 avahi_dns_packet_free(reply);
397 int unicast_response, flush_cache, auxiliary;
398 AvahiDnsPacket *reply = NULL;
401 /* In case the query packet was truncated never respond
402 immediately, because known answer suppression records might be
403 contained in later packets */
404 int tc = p && !!(avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & AVAHI_DNS_FLAG_TC);
406 while ((r = avahi_record_list_next(s->record_list, &flush_cache, &unicast_response, &auxiliary))) {
408 int im = immediately;
410 /* Only send the response immediately if it contains a
411 * unique entry AND it is not in reply to a truncated
412 * packet AND it is not an auxiliary record AND all other
413 * responses for this record are unique too. */
415 if (flush_cache && !tc && !auxiliary && avahi_record_list_all_flush_cache(s->record_list))
418 if (!avahi_interface_post_response(i, r, flush_cache, a, im) && unicast_response) {
420 /* Due to some reasons the record has not been scheduled.
421 * The client requested an unicast response in that
422 * case. Therefore we prepare such a response */
424 append_aux_records_to_list(s, i, r, unicast_response);
431 if (!(reply = avahi_dns_packet_new_reply(p, i->hardware->mtu, 0, 0)))
435 if (avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
437 /* Appending this record succeeded, so incremeant
438 * the specific header field, and return to the caller */
440 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
444 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
447 /* The record is too large for one packet, so create a larger packet */
449 avahi_dns_packet_free(reply);
450 size = avahi_record_get_estimate_size(r) + AVAHI_DNS_PACKET_HEADER_SIZE;
452 if (!(reply = avahi_dns_packet_new_reply(p, size + AVAHI_DNS_PACKET_EXTRA_SIZE, 0, 1)))
455 if (avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
457 /* Appending this record succeeded, so incremeant
458 * the specific header field, and return to the caller */
460 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
465 /* We completely fucked up, there's
466 * nothing we can do. The RR just doesn't
467 * fit in. Let's ignore it. */
470 avahi_dns_packet_free(reply);
472 t = avahi_record_to_string(r);
473 avahi_log_warn("Record [%s] too large, doesn't fit in any packet!", t);
479 /* Appending the record didn't succeeed, so let's send this packet, and create a new one */
480 avahi_interface_send_packet_unicast(i, reply, a, port);
481 avahi_dns_packet_free(reply);
486 avahi_record_unref(r);
490 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
491 avahi_interface_send_packet_unicast(i, reply, a, port);
492 avahi_dns_packet_free(reply);
496 avahi_record_list_flush(s->record_list);
499 static void reflect_response(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, int flush_cache) {
506 if (!s->config.enable_reflector)
509 for (j = s->monitor->interfaces; j; j = j->interface_next)
510 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol))
511 avahi_interface_post_response(j, r, flush_cache, NULL, 1);
514 static void* reflect_cache_walk_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, void* userdata) {
515 AvahiServer *s = userdata;
522 avahi_record_list_push(s->record_list, e->record, e->cache_flush, 0, 0);
526 static void reflect_query(AvahiServer *s, AvahiInterface *i, AvahiKey *k) {
533 if (!s->config.enable_reflector)
536 for (j = s->monitor->interfaces; j; j = j->interface_next)
537 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol)) {
538 /* Post the query to other networks */
539 avahi_interface_post_query(j, k, 1, NULL);
541 /* Reply from caches of other network. This is needed to
542 * "work around" known answer suppression. */
544 avahi_cache_walk(j->cache, k, reflect_cache_walk_callback, s);
548 static void reflect_probe(AvahiServer *s, AvahiInterface *i, AvahiRecord *r) {
555 if (!s->config.enable_reflector)
558 for (j = s->monitor->interfaces; j; j = j->interface_next)
559 if (j != i && (s->config.reflect_ipv || j->protocol == i->protocol))
560 avahi_interface_post_probe(j, r, 1);
563 static void handle_query_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, uint16_t port, int legacy_unicast, int from_local_iface) {
572 assert(avahi_record_list_is_empty(s->record_list));
574 is_probe = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) > 0;
576 /* Handle the questions */
577 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); n > 0; n --) {
579 int unicast_response = 0;
581 if (!(key = avahi_dns_packet_consume_key(p, &unicast_response))) {
582 avahi_log_warn(__FILE__": Packet too short or invalid while reading question key. (Maybe a UTF-8 problem?)");
586 if (!legacy_unicast && !from_local_iface) {
587 reflect_query(s, i, key);
588 if (!unicast_response)
589 avahi_cache_start_poof(i->cache, key, a);
592 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0 &&
593 !(avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & AVAHI_DNS_FLAG_TC))
594 /* Allow our own queries to be suppressed by incoming
595 * queries only when they do not include known answers */
596 avahi_query_scheduler_incoming(i->query_scheduler, key);
598 avahi_server_prepare_matching_responses(s, i, key, unicast_response);
599 avahi_key_unref(key);
602 if (!legacy_unicast) {
604 /* Known Answer Suppression */
605 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT); n > 0; n --) {
609 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
610 avahi_log_warn(__FILE__": Packet too short or invalid while reading known answer record. (Maybe a UTF-8 problem?)");
614 avahi_response_scheduler_suppress(i->response_scheduler, record, a);
615 avahi_record_list_drop(s->record_list, record);
616 avahi_cache_stop_poof(i->cache, record, a);
618 avahi_record_unref(record);
622 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT); n > 0; n --) {
626 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
627 avahi_log_warn(__FILE__": Packet too short or invalid while reading probe record. (Maybe a UTF-8 problem?)");
631 if (!avahi_key_is_pattern(record->key)) {
632 if (!from_local_iface)
633 reflect_probe(s, i, record);
634 incoming_probe(s, record, i);
637 avahi_record_unref(record);
641 if (!avahi_record_list_is_empty(s->record_list))
642 avahi_server_generate_response(s, i, p, a, port, legacy_unicast, is_probe);
647 avahi_record_list_flush(s->record_list);
650 static void handle_response_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, int from_local_iface) {
658 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
659 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); n > 0; n--) {
664 if (!(record = avahi_dns_packet_consume_record(p, &cache_flush))) {
665 avahi_log_warn(__FILE__": Packet too short or invalid while reading response record. (Maybe a UTF-8 problem?)");
669 if (!avahi_key_is_pattern(record->key)) {
671 if (handle_conflict(s, i, record, cache_flush)) {
672 if (!from_local_iface)
673 reflect_response(s, i, record, cache_flush);
674 avahi_cache_update(i->cache, record, cache_flush, a);
675 avahi_response_scheduler_incoming(i->response_scheduler, record, cache_flush);
679 avahi_record_unref(record);
682 /* If the incoming response contained a conflicting record, some
683 records have been scheduling for sending. We need to flush them
685 if (!avahi_record_list_is_empty(s->record_list))
686 avahi_server_generate_response(s, i, NULL, NULL, 0, 0, 1);
689 static AvahiLegacyUnicastReflectSlot* allocate_slot(AvahiServer *s) {
690 unsigned n, idx = (unsigned) -1;
691 AvahiLegacyUnicastReflectSlot *slot;
695 if (!s->legacy_unicast_reflect_slots)
696 s->legacy_unicast_reflect_slots = avahi_new0(AvahiLegacyUnicastReflectSlot*, AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX);
698 for (n = 0; n < AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX; n++, s->legacy_unicast_reflect_id++) {
699 idx = s->legacy_unicast_reflect_id % AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX;
701 if (!s->legacy_unicast_reflect_slots[idx])
705 if (idx == (unsigned) -1 || s->legacy_unicast_reflect_slots[idx])
708 if (!(slot = avahi_new(AvahiLegacyUnicastReflectSlot, 1)))
709 return NULL; /* OOM */
711 s->legacy_unicast_reflect_slots[idx] = slot;
712 slot->id = s->legacy_unicast_reflect_id++;
718 static void deallocate_slot(AvahiServer *s, AvahiLegacyUnicastReflectSlot *slot) {
724 idx = slot->id % AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX;
726 assert(s->legacy_unicast_reflect_slots[idx] == slot);
728 avahi_time_event_free(slot->time_event);
731 s->legacy_unicast_reflect_slots[idx] = NULL;
734 static void free_slots(AvahiServer *s) {
738 if (!s->legacy_unicast_reflect_slots)
741 for (idx = 0; idx < AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX; idx ++)
742 if (s->legacy_unicast_reflect_slots[idx])
743 deallocate_slot(s, s->legacy_unicast_reflect_slots[idx]);
745 avahi_free(s->legacy_unicast_reflect_slots);
746 s->legacy_unicast_reflect_slots = NULL;
749 static AvahiLegacyUnicastReflectSlot* find_slot(AvahiServer *s, uint16_t id) {
754 if (!s->legacy_unicast_reflect_slots)
757 idx = id % AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX;
759 if (!s->legacy_unicast_reflect_slots[idx] || s->legacy_unicast_reflect_slots[idx]->id != id)
762 return s->legacy_unicast_reflect_slots[idx];
765 static void legacy_unicast_reflect_slot_timeout(AvahiTimeEvent *e, void *userdata) {
766 AvahiLegacyUnicastReflectSlot *slot = userdata;
770 assert(slot->time_event == e);
772 deallocate_slot(slot->server, slot);
775 static void reflect_legacy_unicast_query_packet(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, uint16_t port) {
776 AvahiLegacyUnicastReflectSlot *slot;
784 assert(i->protocol == a->proto);
786 if (!s->config.enable_reflector)
789 /* Reflecting legacy unicast queries is a little more complicated
790 than reflecting normal queries, since we must route the
791 responses back to the right client. Therefore we must store
792 some information for finding the right client contact data for
793 response packets. In contrast to normal queries legacy
794 unicast query and response packets are reflected untouched and
795 are not reassembled into larger packets */
797 if (!(slot = allocate_slot(s))) {
798 /* No slot available, we drop this legacy unicast query */
799 avahi_log_warn("No slot available for legacy unicast reflection, dropping query packet.");
803 slot->original_id = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID);
806 slot->interface = i->hardware->index;
808 avahi_elapse_time(&slot->elapse_time, 2000, 0);
809 slot->time_event = avahi_time_event_new(s->time_event_queue, &slot->elapse_time, legacy_unicast_reflect_slot_timeout, slot);
811 /* Patch the packet with our new locally generatet id */
812 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id);
814 for (j = s->monitor->interfaces; j; j = j->interface_next)
817 (s->config.reflect_ipv || j->protocol == i->protocol)) {
819 if (j->protocol == AVAHI_PROTO_INET && s->fd_legacy_unicast_ipv4 >= 0) {
820 avahi_send_dns_packet_ipv4(s->fd_legacy_unicast_ipv4, j->hardware->index, p, NULL, NULL, 0);
821 } else if (j->protocol == AVAHI_PROTO_INET6 && s->fd_legacy_unicast_ipv6 >= 0)
822 avahi_send_dns_packet_ipv6(s->fd_legacy_unicast_ipv6, j->hardware->index, p, NULL, NULL, 0);
826 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->original_id);
829 static int originates_from_local_legacy_unicast_socket(AvahiServer *s, const AvahiAddress *address, uint16_t port) {
834 if (!s->config.enable_reflector)
837 if (!avahi_address_is_local(s->monitor, address))
840 if (address->proto == AVAHI_PROTO_INET && s->fd_legacy_unicast_ipv4 >= 0) {
841 struct sockaddr_in lsa;
842 socklen_t l = sizeof(lsa);
844 if (getsockname(s->fd_legacy_unicast_ipv4, (struct sockaddr*) &lsa, &l) != 0)
845 avahi_log_warn("getsockname(): %s", strerror(errno));
847 return lsa.sin_port == port;
851 if (address->proto == AVAHI_PROTO_INET6 && s->fd_legacy_unicast_ipv6 >= 0) {
852 struct sockaddr_in6 lsa;
853 socklen_t l = sizeof(lsa);
855 if (getsockname(s->fd_legacy_unicast_ipv6, (struct sockaddr*) &lsa, &l) != 0)
856 avahi_log_warn("getsockname(): %s", strerror(errno));
858 return lsa.sin6_port == port;
864 static int is_mdns_mcast_address(const AvahiAddress *a) {
868 avahi_address_parse(a->proto == AVAHI_PROTO_INET ? AVAHI_IPV4_MCAST_GROUP : AVAHI_IPV6_MCAST_GROUP, a->proto, &b);
869 return avahi_address_cmp(a, &b) == 0;
872 static int originates_from_local_iface(AvahiServer *s, AvahiIfIndex iface, const AvahiAddress *a, uint16_t port) {
874 assert(iface != AVAHI_IF_UNSPEC);
877 /* If it isn't the MDNS port it can't be generated by us */
878 if (port != AVAHI_MDNS_PORT)
881 return avahi_interface_has_address(s->monitor, iface, a);
884 static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const AvahiAddress *src_address, uint16_t port, const AvahiAddress *dst_address, AvahiIfIndex iface, int ttl) {
886 int from_local_iface = 0;
893 assert(src_address->proto == dst_address->proto);
895 if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, src_address->proto)) ||
897 avahi_log_warn("Received packet from invalid interface.");
901 if (avahi_address_is_ipv4_in_ipv6(src_address))
902 /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
905 if (originates_from_local_legacy_unicast_socket(s, src_address, port))
906 /* This originates from our local reflector, so let's ignore it */
909 /* We don't want to reflect local traffic, so we check if this packet is generated locally. */
910 if (s->config.enable_reflector)
911 from_local_iface = originates_from_local_iface(s, iface, src_address, port);
913 if (avahi_dns_packet_check_valid_multicast(p) < 0) {
914 avahi_log_warn("Received invalid packet.");
918 if (avahi_dns_packet_is_query(p)) {
919 int legacy_unicast = 0;
921 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT) != 0) {
922 avahi_log_warn("Invalid query packet.");
926 if (port != AVAHI_MDNS_PORT) {
929 if ((avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) != 0 ||
930 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0)) {
931 avahi_log_warn("Invalid legacy unicast query packet.");
939 reflect_legacy_unicast_query_packet(s, p, i, src_address, port);
941 handle_query_packet(s, p, i, src_address, port, legacy_unicast, from_local_iface);
944 char t[AVAHI_ADDRESS_STR_MAX];
946 if (port != AVAHI_MDNS_PORT) {
947 avahi_log_warn("Received response from host %s with invalid source port %u on interface '%s.%i'", avahi_address_snprint(t, sizeof(t), src_address), port, i->hardware->name, i->protocol);
951 if (ttl != 255 && s->config.check_response_ttl) {
952 avahi_log_warn("Received response from host %s with invalid TTL %u on interface '%s.%i'.", avahi_address_snprint(t, sizeof(t), src_address), ttl, i->hardware->name, i->protocol);
956 if (!is_mdns_mcast_address(dst_address) &&
957 !avahi_interface_address_on_link(i, src_address)) {
959 avahi_log_warn("Received non-local response from host %s on interface '%s.%i'.", avahi_address_snprint(t, sizeof(t), src_address), i->hardware->name, i->protocol);
963 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT) != 0 ||
964 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0 ||
965 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0) {
967 avahi_log_warn("Invalid response packet from host %s.", avahi_address_snprint(t, sizeof(t), src_address));
971 handle_response_packet(s, p, i, src_address, from_local_iface);
975 static void dispatch_legacy_unicast_packet(AvahiServer *s, AvahiDnsPacket *p) {
977 AvahiLegacyUnicastReflectSlot *slot;
982 if (avahi_dns_packet_check_valid(p) < 0 || avahi_dns_packet_is_query(p)) {
983 avahi_log_warn("Received invalid packet.");
987 if (!(slot = find_slot(s, avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID)))) {
988 avahi_log_warn("Received legacy unicast response with unknown id");
992 if (!(j = avahi_interface_monitor_get_interface(s->monitor, slot->interface, slot->address.proto)) ||
996 /* Patch the original ID into this response */
997 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->original_id);
999 /* Forward the response to the correct client */
1000 avahi_interface_send_packet_unicast(j, p, &slot->address, slot->port);
1002 /* Undo changes to packet */
1003 avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id);
1006 static void cleanup_dead(AvahiServer *s) {
1009 avahi_cleanup_dead_entries(s);
1010 avahi_browser_cleanup(s);
1013 static void mcast_socket_event(AvahiWatch *w, int fd, AvahiWatchEvent events, void *userdata) {
1014 AvahiServer *s = userdata;
1015 AvahiAddress dest, src;
1016 AvahiDnsPacket *p = NULL;
1023 assert(events & AVAHI_WATCH_IN);
1025 if (fd == s->fd_ipv4) {
1026 dest.proto = src.proto = AVAHI_PROTO_INET;
1027 p = avahi_recv_dns_packet_ipv4(s->fd_ipv4, &src.data.ipv4, &port, &dest.data.ipv4, &iface, &ttl);
1029 assert(fd == s->fd_ipv6);
1030 dest.proto = src.proto = AVAHI_PROTO_INET6;
1031 p = avahi_recv_dns_packet_ipv6(s->fd_ipv6, &src.data.ipv6, &port, &dest.data.ipv6, &iface, &ttl);
1035 if (iface == AVAHI_IF_UNSPEC)
1036 iface = avahi_find_interface_for_address(s->monitor, &dest);
1038 if (iface != AVAHI_IF_UNSPEC)
1039 dispatch_packet(s, p, &src, port, &dest, iface, ttl);
1041 avahi_log_error("Incoming packet recieved on address that isn't local.");
1043 avahi_dns_packet_free(p);
1049 static void legacy_unicast_socket_event(AvahiWatch *w, int fd, AvahiWatchEvent events, void *userdata) {
1050 AvahiServer *s = userdata;
1051 AvahiDnsPacket *p = NULL;
1055 assert(events & AVAHI_WATCH_IN);
1057 if (fd == s->fd_legacy_unicast_ipv4)
1058 p = avahi_recv_dns_packet_ipv4(s->fd_legacy_unicast_ipv4, NULL, NULL, NULL, NULL, NULL);
1060 assert(fd == s->fd_legacy_unicast_ipv6);
1061 p = avahi_recv_dns_packet_ipv6(s->fd_legacy_unicast_ipv6, NULL, NULL, NULL, NULL, NULL);
1065 dispatch_legacy_unicast_packet(s, p);
1066 avahi_dns_packet_free(p);
1072 static void server_set_state(AvahiServer *s, AvahiServerState state) {
1075 if (s->state == state)
1080 avahi_interface_monitor_update_rrs(s->monitor, 0);
1083 s->callback(s, state, s->userdata);
1086 static void withdraw_host_rrs(AvahiServer *s) {
1089 if (s->hinfo_entry_group)
1090 avahi_s_entry_group_reset(s->hinfo_entry_group);
1092 if (s->browse_domain_entry_group)
1093 avahi_s_entry_group_reset(s->browse_domain_entry_group);
1095 avahi_interface_monitor_update_rrs(s->monitor, 1);
1096 s->n_host_rr_pending = 0;
1099 void avahi_server_decrease_host_rr_pending(AvahiServer *s) {
1102 assert(s->n_host_rr_pending > 0);
1104 if (--s->n_host_rr_pending == 0)
1105 server_set_state(s, AVAHI_SERVER_RUNNING);
1108 void avahi_host_rr_entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) {
1112 if (state == AVAHI_ENTRY_GROUP_REGISTERING &&
1113 s->state == AVAHI_SERVER_REGISTERING)
1114 s->n_host_rr_pending ++;
1116 else if (state == AVAHI_ENTRY_GROUP_COLLISION &&
1117 (s->state == AVAHI_SERVER_REGISTERING || s->state == AVAHI_SERVER_RUNNING)) {
1118 withdraw_host_rrs(s);
1119 server_set_state(s, AVAHI_SERVER_COLLISION);
1121 } else if (state == AVAHI_ENTRY_GROUP_ESTABLISHED &&
1122 s->state == AVAHI_SERVER_REGISTERING)
1123 avahi_server_decrease_host_rr_pending(s);
1126 static void register_hinfo(AvahiServer *s) {
1127 struct utsname utsname;
1132 if (!s->config.publish_hinfo)
1135 if (s->hinfo_entry_group)
1136 assert(avahi_s_entry_group_is_empty(s->hinfo_entry_group));
1138 s->hinfo_entry_group = avahi_s_entry_group_new(s, avahi_host_rr_entry_group_callback, NULL);
1140 if (!s->hinfo_entry_group) {
1141 avahi_log_warn("Failed to create HINFO entry group: %s", avahi_strerror(s->error));
1145 /* Fill in HINFO rr */
1146 if ((r = avahi_record_new_full(s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO, AVAHI_DEFAULT_TTL_HOST_NAME))) {
1148 if (uname(&utsname) < 0)
1149 avahi_log_warn("uname() failed: %s\n", avahi_strerror(errno));
1152 r->data.hinfo.cpu = avahi_strdup(avahi_strup(utsname.machine));
1153 r->data.hinfo.os = avahi_strdup(avahi_strup(utsname.sysname));
1155 avahi_log_info("Registering HINFO record with values '%s'/'%s'.", r->data.hinfo.cpu, r->data.hinfo.os);
1157 if (avahi_server_add(s, s->hinfo_entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_UNIQUE, r) < 0) {
1158 avahi_log_warn("Failed to add HINFO RR: %s", avahi_strerror(s->error));
1163 avahi_record_unref(r);
1166 if (avahi_s_entry_group_commit(s->hinfo_entry_group) < 0)
1167 avahi_log_warn("Failed to commit HINFO entry group: %s", avahi_strerror(s->error));
1171 static void register_localhost(AvahiServer *s) {
1175 /* Add localhost entries */
1176 avahi_address_parse("127.0.0.1", AVAHI_PROTO_INET, &a);
1177 avahi_server_add_address(s, NULL, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_NO_ANNOUNCE, "localhost", &a);
1179 avahi_address_parse("::1", AVAHI_PROTO_INET6, &a);
1180 avahi_server_add_address(s, NULL, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_NO_ANNOUNCE, "ip6-localhost", &a);
1183 static void register_browse_domain(AvahiServer *s) {
1186 if (!s->config.publish_domain)
1189 if (avahi_domain_equal(s->domain_name, "local"))
1192 if (s->browse_domain_entry_group)
1193 assert(avahi_s_entry_group_is_empty(s->browse_domain_entry_group));
1195 s->browse_domain_entry_group = avahi_s_entry_group_new(s, NULL, NULL);
1197 if (!s->browse_domain_entry_group) {
1198 avahi_log_warn("Failed to create browse domain entry group: %s", avahi_strerror(s->error));
1202 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) {
1203 avahi_log_warn("Failed to add browse domain RR: %s", avahi_strerror(s->error));
1207 if (avahi_s_entry_group_commit(s->browse_domain_entry_group) < 0)
1208 avahi_log_warn("Failed to commit browse domain entry group: %s", avahi_strerror(s->error));
1211 static void register_stuff(AvahiServer *s) {
1214 server_set_state(s, AVAHI_SERVER_REGISTERING);
1215 s->n_host_rr_pending ++; /** Make sure that the state isn't changed tp AVAHI_SERVER_RUNNING too early */
1218 register_browse_domain(s);
1219 avahi_interface_monitor_update_rrs(s->monitor, 0);
1221 s->n_host_rr_pending --;
1223 if (s->n_host_rr_pending == 0)
1224 server_set_state(s, AVAHI_SERVER_RUNNING);
1227 static void update_fqdn(AvahiServer *s) {
1231 assert(s->host_name);
1232 assert(s->domain_name);
1234 if (!(n = avahi_strdup_printf("%s.%s", s->host_name, s->domain_name)))
1237 avahi_free(s->host_name_fqdn);
1238 s->host_name_fqdn = n;
1241 int avahi_server_set_host_name(AvahiServer *s, const char *host_name) {
1245 AVAHI_CHECK_VALIDITY(s, !host_name || avahi_is_valid_host_name(host_name), AVAHI_ERR_INVALID_HOST_NAME);
1248 hn = avahi_get_host_name_strdup();
1249 hn[strcspn(hn, ".")] = 0;
1253 if (avahi_domain_equal(s->host_name, host_name) && s->state != AVAHI_SERVER_COLLISION) {
1255 return avahi_server_set_errno(s, AVAHI_ERR_NO_CHANGE);
1258 withdraw_host_rrs(s);
1260 avahi_free(s->host_name);
1261 s->host_name = hn ? hn : avahi_strdup(host_name);
1269 int avahi_server_set_domain_name(AvahiServer *s, const char *domain_name) {
1273 AVAHI_CHECK_VALIDITY(s, !domain_name || avahi_is_valid_domain_name(domain_name), AVAHI_ERR_INVALID_DOMAIN_NAME);
1276 dn = avahi_strdup("local");
1280 if (avahi_domain_equal(s->domain_name, domain_name)) {
1282 return avahi_server_set_errno(s, AVAHI_ERR_NO_CHANGE);
1285 withdraw_host_rrs(s);
1287 avahi_free(s->domain_name);
1288 s->domain_name = avahi_normalize_name_strdup(domain_name);
1297 static int valid_server_config(const AvahiServerConfig *sc) {
1302 if (sc->n_wide_area_servers > AVAHI_WIDE_AREA_SERVERS_MAX)
1303 return AVAHI_ERR_INVALID_CONFIG;
1305 if (sc->host_name && !avahi_is_valid_host_name(sc->host_name))
1306 return AVAHI_ERR_INVALID_HOST_NAME;
1308 if (sc->domain_name && !avahi_is_valid_domain_name(sc->domain_name))
1309 return AVAHI_ERR_INVALID_DOMAIN_NAME;
1311 for (l = sc->browse_domains; l; l = l->next)
1312 if (!avahi_is_valid_domain_name((char*) l->text))
1313 return AVAHI_ERR_INVALID_DOMAIN_NAME;
1318 static int setup_sockets(AvahiServer *s) {
1321 s->fd_ipv4 = s->config.use_ipv4 ? avahi_open_socket_ipv4(s->config.disallow_other_stacks) : -1;
1322 s->fd_ipv6 = s->config.use_ipv6 ? avahi_open_socket_ipv6(s->config.disallow_other_stacks) : -1;
1324 if (s->fd_ipv6 < 0 && s->fd_ipv4 < 0)
1325 return AVAHI_ERR_NO_NETWORK;
1327 if (s->fd_ipv4 < 0 && s->config.use_ipv4)
1328 avahi_log_notice("Failed to create IPv4 socket, proceeding in IPv6 only mode");
1329 else if (s->fd_ipv6 < 0 && s->config.use_ipv6)
1330 avahi_log_notice("Failed to create IPv6 socket, proceeding in IPv4 only mode");
1332 s->fd_legacy_unicast_ipv4 = s->fd_ipv4 >= 0 && s->config.enable_reflector ? avahi_open_unicast_socket_ipv4() : -1;
1333 s->fd_legacy_unicast_ipv6 = s->fd_ipv6 >= 0 && s->config.enable_reflector ? avahi_open_unicast_socket_ipv6() : -1;
1337 s->watch_legacy_unicast_ipv4 =
1338 s->watch_legacy_unicast_ipv6 = NULL;
1340 if (s->fd_ipv4 >= 0)
1341 s->watch_ipv4 = s->poll_api->watch_new(s->poll_api, s->fd_ipv4, AVAHI_WATCH_IN, mcast_socket_event, s);
1342 if (s->fd_ipv6 >= 0)
1343 s->watch_ipv6 = s->poll_api->watch_new(s->poll_api, s->fd_ipv6, AVAHI_WATCH_IN, mcast_socket_event, s);
1345 if (s->fd_legacy_unicast_ipv4 >= 0)
1346 s->watch_legacy_unicast_ipv4 = s->poll_api->watch_new(s->poll_api, s->fd_legacy_unicast_ipv4, AVAHI_WATCH_IN, legacy_unicast_socket_event, s);
1347 if (s->fd_legacy_unicast_ipv6 >= 0)
1348 s->watch_legacy_unicast_ipv6 = s->poll_api->watch_new(s->poll_api, s->fd_legacy_unicast_ipv6, AVAHI_WATCH_IN, legacy_unicast_socket_event, s);
1353 AvahiServer *avahi_server_new(const AvahiPoll *poll_api, const AvahiServerConfig *sc, AvahiServerCallback callback, void* userdata, int *error) {
1357 if (sc && (e = valid_server_config(sc)) < 0) {
1363 if (!(s = avahi_new(AvahiServer, 1))) {
1365 *error = AVAHI_ERR_NO_MEMORY;
1370 s->poll_api = poll_api;
1373 avahi_server_config_copy(&s->config, sc);
1375 avahi_server_config_init(&s->config);
1377 if ((e = setup_sockets(s)) < 0) {
1381 avahi_server_config_free(&s->config);
1387 s->n_host_rr_pending = 0;
1388 s->need_entry_cleanup = 0;
1389 s->need_group_cleanup = 0;
1390 s->need_browser_cleanup = 0;
1391 s->hinfo_entry_group = NULL;
1392 s->browse_domain_entry_group = NULL;
1393 s->error = AVAHI_OK;
1394 s->state = AVAHI_SERVER_INVALID;
1396 s->callback = callback;
1397 s->userdata = userdata;
1399 s->time_event_queue = avahi_time_event_queue_new(poll_api);
1401 s->entries_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL);
1402 AVAHI_LLIST_HEAD_INIT(AvahiEntry, s->entries);
1403 AVAHI_LLIST_HEAD_INIT(AvahiGroup, s->groups);
1405 s->record_browser_hashmap = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL);
1406 AVAHI_LLIST_HEAD_INIT(AvahiSRecordBrowser, s->record_browsers);
1407 AVAHI_LLIST_HEAD_INIT(AvahiSHostNameResolver, s->host_name_resolvers);
1408 AVAHI_LLIST_HEAD_INIT(AvahiSAddressResolver, s->address_resolvers);
1409 AVAHI_LLIST_HEAD_INIT(AvahiSDomainBrowser, s->domain_browsers);
1410 AVAHI_LLIST_HEAD_INIT(AvahiSServiceTypeBrowser, s->service_type_browsers);
1411 AVAHI_LLIST_HEAD_INIT(AvahiSServiceBrowser, s->service_browsers);
1412 AVAHI_LLIST_HEAD_INIT(AvahiSServiceResolver, s->service_resolvers);
1413 AVAHI_LLIST_HEAD_INIT(AvahiSDNSServerBrowser, s->dns_server_browsers);
1415 s->legacy_unicast_reflect_slots = NULL;
1416 s->legacy_unicast_reflect_id = 0;
1418 s->record_list = avahi_record_list_new();
1421 s->host_name = s->config.host_name ? avahi_normalize_name_strdup(s->config.host_name) : avahi_get_host_name_strdup();
1422 s->host_name[strcspn(s->host_name, ".")] = 0;
1423 s->domain_name = s->config.domain_name ? avahi_normalize_name_strdup(s->config.domain_name) : avahi_strdup("local");
1424 s->host_name_fqdn = NULL;
1428 s->local_service_cookie = (uint32_t) rand() * (uint32_t) rand();
1429 } while (s->local_service_cookie == AVAHI_SERVICE_COOKIE_INVALID);
1431 if (s->config.enable_wide_area) {
1432 s->wide_area_lookup_engine = avahi_wide_area_engine_new(s);
1433 avahi_wide_area_set_servers(s->wide_area_lookup_engine, s->config.wide_area_servers, s->config.n_wide_area_servers);
1435 s->wide_area_lookup_engine = NULL;
1437 s->multicast_lookup_engine = avahi_multicast_lookup_engine_new(s);
1439 s->monitor = avahi_interface_monitor_new(s);
1440 avahi_interface_monitor_sync(s->monitor);
1442 register_localhost(s);
1448 void avahi_server_free(AvahiServer* s) {
1451 /* Remove all browsers */
1453 while (s->dns_server_browsers)
1454 avahi_s_dns_server_browser_free(s->dns_server_browsers);
1455 while (s->host_name_resolvers)
1456 avahi_s_host_name_resolver_free(s->host_name_resolvers);
1457 while (s->address_resolvers)
1458 avahi_s_address_resolver_free(s->address_resolvers);
1459 while (s->domain_browsers)
1460 avahi_s_domain_browser_free(s->domain_browsers);
1461 while (s->service_type_browsers)
1462 avahi_s_service_type_browser_free(s->service_type_browsers);
1463 while (s->service_browsers)
1464 avahi_s_service_browser_free(s->service_browsers);
1465 while (s->service_resolvers)
1466 avahi_s_service_resolver_free(s->service_resolvers);
1467 while (s->record_browsers)
1468 avahi_s_record_browser_destroy(s->record_browsers);
1470 /* Remove all locally rgeistered stuff */
1473 avahi_entry_free(s, s->entries);
1475 avahi_interface_monitor_free(s->monitor);
1478 avahi_entry_group_free(s, s->groups);
1482 avahi_hashmap_free(s->entries_by_key);
1483 avahi_record_list_free(s->record_list);
1484 avahi_hashmap_free(s->record_browser_hashmap);
1486 if (s->wide_area_lookup_engine)
1487 avahi_wide_area_engine_free(s->wide_area_lookup_engine);
1488 avahi_multicast_lookup_engine_free(s->multicast_lookup_engine);
1490 avahi_time_event_queue_free(s->time_event_queue);
1495 s->poll_api->watch_free(s->watch_ipv4);
1497 s->poll_api->watch_free(s->watch_ipv6);
1499 if (s->watch_legacy_unicast_ipv4)
1500 s->poll_api->watch_free(s->watch_legacy_unicast_ipv4);
1501 if (s->watch_legacy_unicast_ipv6)
1502 s->poll_api->watch_free(s->watch_legacy_unicast_ipv6);
1506 if (s->fd_ipv4 >= 0)
1508 if (s->fd_ipv6 >= 0)
1511 if (s->fd_legacy_unicast_ipv4 >= 0)
1512 close(s->fd_legacy_unicast_ipv4);
1513 if (s->fd_legacy_unicast_ipv6 >= 0)
1514 close(s->fd_legacy_unicast_ipv6);
1516 /* Free other stuff */
1518 avahi_free(s->host_name);
1519 avahi_free(s->domain_name);
1520 avahi_free(s->host_name_fqdn);
1522 avahi_server_config_free(&s->config);
1527 const char* avahi_server_get_domain_name(AvahiServer *s) {
1530 return s->domain_name;
1533 const char* avahi_server_get_host_name(AvahiServer *s) {
1536 return s->host_name;
1539 const char* avahi_server_get_host_name_fqdn(AvahiServer *s) {
1542 return s->host_name_fqdn;
1545 void* avahi_server_get_data(AvahiServer *s) {
1551 void avahi_server_set_data(AvahiServer *s, void* userdata) {
1554 s->userdata = userdata;
1557 AvahiServerState avahi_server_get_state(AvahiServer *s) {
1563 AvahiServerConfig* avahi_server_config_init(AvahiServerConfig *c) {
1566 memset(c, 0, sizeof(AvahiServerConfig));
1569 c->host_name = NULL;
1570 c->domain_name = NULL;
1571 c->check_response_ttl = 0;
1572 c->publish_hinfo = 1;
1573 c->publish_addresses = 1;
1574 c->publish_workstation = 1;
1575 c->publish_domain = 1;
1576 c->use_iff_running = 0;
1577 c->enable_reflector = 0;
1579 c->add_service_cookie = 0;
1580 c->enable_wide_area = 0;
1581 c->n_wide_area_servers = 0;
1582 c->disallow_other_stacks = 0;
1583 c->browse_domains = NULL;
1584 c->disable_publishing = 0;
1585 c->allow_point_to_point = 0;
1586 c->publish_aaaa_on_ipv4 = 1;
1587 c->publish_a_on_ipv6 = 0;
1592 void avahi_server_config_free(AvahiServerConfig *c) {
1595 avahi_free(c->host_name);
1596 avahi_free(c->domain_name);
1597 avahi_string_list_free(c->browse_domains);
1600 AvahiServerConfig* avahi_server_config_copy(AvahiServerConfig *ret, const AvahiServerConfig *c) {
1601 char *d = NULL, *h = NULL;
1602 AvahiStringList *l = NULL;
1607 if (!(h = avahi_strdup(c->host_name)))
1611 if (!(d = avahi_strdup(c->domain_name))) {
1616 if (!(l = avahi_string_list_copy(c->browse_domains)) && c->browse_domains) {
1624 ret->domain_name = d;
1625 ret->browse_domains = l;
1630 int avahi_server_errno(AvahiServer *s) {
1636 /* Just for internal use */
1637 int avahi_server_set_errno(AvahiServer *s, int error) {
1640 return s->error = error;
1643 uint32_t avahi_server_get_local_service_cookie(AvahiServer *s) {
1646 return s->local_service_cookie;
1649 static AvahiEntry *find_entry(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiKey *key) {
1655 for (e = avahi_hashmap_lookup(s->entries_by_key, key); e; e = e->by_key_next)
1657 if ((e->interface == interface || e->interface <= 0 || interface <= 0) &&
1658 (e->protocol == protocol || e->protocol == AVAHI_PROTO_UNSPEC || protocol == AVAHI_PROTO_UNSPEC) &&
1659 (!e->group || e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED || e->group->state == AVAHI_ENTRY_GROUP_REGISTERING))
1666 int avahi_server_get_group_of_service(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain, AvahiSEntryGroup** ret_group) {
1667 AvahiKey *key = NULL;
1670 char n[AVAHI_DOMAIN_NAME_MAX];
1677 AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
1678 AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
1679 AVAHI_CHECK_VALIDITY(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
1680 AVAHI_CHECK_VALIDITY(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
1681 AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
1683 if ((ret = avahi_service_name_join(n, sizeof(n), name, type, domain) < 0))
1684 return avahi_server_set_errno(s, ret);
1686 if (!(key = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV)))
1687 return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
1689 e = find_entry(s, interface, protocol, key);
1690 avahi_key_unref(key);
1693 *ret_group = e->group;
1697 return avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
1700 int avahi_server_is_service_local(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, const char *name) {
1701 AvahiKey *key = NULL;
1707 if (!s->host_name_fqdn)
1710 if (!(key = avahi_key_new(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV)))
1713 e = find_entry(s, interface, protocol, key);
1714 avahi_key_unref(key);
1719 return avahi_domain_equal(s->host_name_fqdn, e->record->data.srv.name);
1722 int avahi_server_is_record_local(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *record) {
1728 for (e = avahi_hashmap_lookup(s->entries_by_key, record->key); e; e = e->by_key_next)
1730 if ((e->interface == interface || e->interface <= 0 || interface <= 0) &&
1731 (e->protocol == protocol || e->protocol == AVAHI_PROTO_UNSPEC || protocol == AVAHI_PROTO_UNSPEC) &&
1732 (!e->group || e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED || e->group->state == AVAHI_ENTRY_GROUP_REGISTERING) &&
1733 avahi_record_equal_no_ttl(record, e->record))
1739 /** Set the wide area DNS servers */
1740 int avahi_server_set_wide_area_servers(AvahiServer *s, const AvahiAddress *a, unsigned n) {
1743 if (!s->wide_area_lookup_engine)
1744 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_CONFIG);
1746 avahi_wide_area_set_servers(s->wide_area_lookup_engine, a, n);
1750 const AvahiServerConfig* avahi_server_get_config(AvahiServer *s) {
1756 /** Set the browsing domains */
1757 int avahi_server_set_browse_domains(AvahiServer *s, AvahiStringList *domains) {
1762 for (l = s->config.browse_domains; l; l = l->next)
1763 if (!avahi_is_valid_domain_name((char*) l->text))
1764 return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
1766 avahi_string_list_free(s->config.browse_domains);
1767 s->config.browse_domains = avahi_string_list_copy(domains);