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 "subscribe.h"
38 static void free_entry(AvahiServer*s, AvahiEntry *e) {
44 avahi_goodbye_entry(s, e, TRUE);
46 /* Remove from linked list */
47 AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
49 /* Remove from hash table indexed by name */
50 t = g_hash_table_lookup(s->entries_by_key, e->record->key);
51 AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
53 g_hash_table_replace(s->entries_by_key, t->record->key, t);
55 g_hash_table_remove(s->entries_by_key, e->record->key);
57 /* Remove from associated group */
59 AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
61 avahi_record_unref(e->record);
65 static void free_group(AvahiServer *s, AvahiEntryGroup *g) {
70 free_entry(s, g->entries);
72 AVAHI_LLIST_REMOVE(AvahiEntryGroup, groups, s->groups, g);
76 static void cleanup_dead(AvahiServer *s) {
77 AvahiEntryGroup *g, *ng;
82 if (s->need_group_cleanup) {
83 for (g = s->groups; g; g = ng) {
90 s->need_group_cleanup = FALSE;
93 if (s->need_entry_cleanup) {
94 for (e = s->entries; e; e = ne) {
101 s->need_entry_cleanup = FALSE;
105 static void enum_aux_records(AvahiServer *s, AvahiInterface *i, const gchar *name, guint16 type, void (*callback)(AvahiServer *s, AvahiRecord *r, gboolean flush_cache, gpointer userdata), gpointer userdata) {
114 g_assert(type != AVAHI_DNS_TYPE_ANY);
116 k = avahi_key_new(name, AVAHI_DNS_CLASS_IN, type);
118 for (e = g_hash_table_lookup(s->entries_by_key, k); e; e = e->by_key_next)
119 if (!e->dead && avahi_entry_registered(s, e, i))
120 callback(s, e->record, e->flags & AVAHI_ENTRY_UNIQUE, userdata);
125 void avahi_server_enumerate_aux_records(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, void (*callback)(AvahiServer *s, AvahiRecord *r, gboolean flush_cache, gpointer userdata), gpointer userdata) {
131 if (r->key->class == AVAHI_DNS_CLASS_IN) {
132 if (r->key->type == AVAHI_DNS_TYPE_PTR) {
133 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_SRV, callback, userdata);
134 enum_aux_records(s, i, r->data.ptr.name, AVAHI_DNS_TYPE_TXT, callback, userdata);
135 } else if (r->key->type == AVAHI_DNS_TYPE_SRV) {
136 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_A, callback, userdata);
137 enum_aux_records(s, i, r->data.srv.name, AVAHI_DNS_TYPE_AAAA, callback, userdata);
142 void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry *e, gboolean unicast_response, gboolean auxiliary) {
147 avahi_record_list_push(s->record_list, e->record, e->flags & AVAHI_ENTRY_UNIQUE, unicast_response, auxiliary);
150 void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, gboolean unicast_response) {
158 /* g_message("Posting responses matching [%s]", txt = avahi_key_to_string(k)); */
161 if (avahi_key_is_pattern(k)) {
163 /* Handle ANY query */
165 for (e = s->entries; e; e = e->entries_next)
166 if (!e->dead && avahi_key_pattern_match(k, e->record->key) && avahi_entry_registered(s, e, i))
167 avahi_server_prepare_response(s, i, e, unicast_response, FALSE);
171 /* Handle all other queries */
173 for (e = g_hash_table_lookup(s->entries_by_key, k); e; e = e->by_key_next)
174 if (!e->dead && avahi_entry_registered(s, e, i))
175 avahi_server_prepare_response(s, i, e, unicast_response, FALSE);
179 static void withdraw_entry(AvahiServer *s, AvahiEntry *e) {
186 for (k = e->group->entries; k; k = k->by_group_next) {
187 avahi_goodbye_entry(s, k, FALSE);
191 avahi_entry_group_change_state(e->group, AVAHI_ENTRY_GROUP_COLLISION);
193 avahi_goodbye_entry(s, e, FALSE);
197 s->need_entry_cleanup = TRUE;
200 static void withdraw_rrset(AvahiServer *s, AvahiKey *key) {
206 for (e = g_hash_table_lookup(s->entries_by_key, key); e; e = e->by_key_next)
207 withdraw_entry(s, e);
210 static void incoming_probe(AvahiServer *s, AvahiRecord *record, AvahiInterface *i) {
213 gboolean ours = FALSE, won = FALSE, lost = FALSE;
219 for (e = g_hash_table_lookup(s->entries_by_key, record->key); e; e = n) {
223 if (e->dead || !avahi_entry_probing(s, e, i))
226 if ((cmp = avahi_record_lexicographical_compare(e->record, record)) == 0) {
235 t = avahi_record_to_string(record);
240 g_message("Recieved conflicting probe [%s]. Local host won.", t);
242 g_message("Recieved conflicting probe [%s]. Local host lost. Withdrawing.", t);
243 withdraw_rrset(s, record->key);
250 static gboolean handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord *record, gboolean unique, const AvahiAddress *a) {
251 gboolean valid = TRUE, ours = FALSE, conflict = FALSE, withdraw_immediately = FALSE;
252 AvahiEntry *e, *n, *conflicting_entry = NULL;
259 t = avahi_record_to_string(record);
261 /* g_message("CHECKING FOR CONFLICT: [%s]", t); */
263 for (e = g_hash_table_lookup(s->entries_by_key, record->key); e; e = n) {
266 if (e->dead || (!(e->flags & AVAHI_ENTRY_UNIQUE) && !unique))
269 /* Either our entry or the other is intended to be unique, so let's check */
271 if (avahi_entry_registered(s, e, i)) {
273 if (avahi_record_equal_no_ttl(e->record, record)) {
274 ours = TRUE; /* We have an identical record, so this is no conflict */
276 /* Check wheter there is a TTL conflict */
277 if (record->ttl <= e->record->ttl/2) {
279 g_message("Recieved record with bad TTL [%s]. Refreshing.", t);
280 avahi_interface_post_response(i, e->record, FALSE, NULL, TRUE);
284 /* There's no need to check the other entries of this RRset */
287 /* A conflict => we have to return to probe mode */
289 conflicting_entry = e;
292 } else if (avahi_entry_probing(s, e, i)) {
294 if (!avahi_record_equal_no_ttl(record, e->record)) {
296 /* We are currently registering a matching record, but
297 * someone else already claimed it, so let's
300 withdraw_immediately = TRUE;
305 /* g_message("ours=%i conflict=%i", ours, conflict); */
307 if (!ours && conflict) {
310 if (withdraw_immediately) {
311 g_message("Recieved conflicting record [%s] with local record to be. Withdrawing.", t);
312 withdraw_rrset(s, record->key);
314 g_assert(conflicting_entry);
315 g_message("Recieved conflicting record [%s]. Resetting our record.", t);
316 avahi_entry_return_to_initial_state(s, conflicting_entry, i);
318 /* Local unique records are returned to probin
319 * state. Local shared records are reannounced. */
328 static void append_aux_callback(AvahiServer *s, AvahiRecord *r, gboolean flush_cache, gpointer userdata) {
329 gboolean *unicast_response = userdata;
333 g_assert(unicast_response);
335 avahi_record_list_push(s->record_list, r, flush_cache, *unicast_response, TRUE);
338 static void append_aux_records_to_list(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, gboolean unicast_response) {
342 avahi_server_enumerate_aux_records(s, i, r, append_aux_callback, &unicast_response);
345 void avahi_server_generate_response(AvahiServer *s, AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, guint16 port, gboolean legacy_unicast) {
349 g_assert(!legacy_unicast || (a && port > 0 && p));
351 if (legacy_unicast) {
352 AvahiDnsPacket *reply;
355 reply = avahi_dns_packet_new_reply(p, 512 /* unicast DNS maximum packet size is 512 */ , TRUE, TRUE);
357 while ((r = avahi_record_list_next(s->record_list, NULL, NULL, NULL))) {
359 append_aux_records_to_list(s, i, r, FALSE);
361 if (avahi_dns_packet_append_record(reply, r, FALSE, 10))
362 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
364 gchar *t = avahi_record_to_string(r);
365 g_warning("Record [%s] not fitting in legacy unicast packet, dropping.", t);
369 avahi_record_unref(r);
372 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
373 avahi_interface_send_packet_unicast(i, reply, a, port);
375 avahi_dns_packet_free(reply);
378 gboolean unicast_response, flush_cache, auxiliary;
379 AvahiDnsPacket *reply = NULL;
382 while ((r = avahi_record_list_next(s->record_list, &flush_cache, &unicast_response, &auxiliary))) {
385 if (!avahi_interface_post_response(i, r, flush_cache, a, flush_cache && !auxiliary) && unicast_response) {
387 append_aux_records_to_list(s, i, r, unicast_response);
389 /* Due to some reasons the record has not been scheduled.
390 * The client requested an unicast response in that
391 * case. Therefore we prepare such a response */
397 reply = avahi_dns_packet_new_reply(p, i->hardware->mtu, FALSE, FALSE);
400 if (avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
402 /* Appending this record succeeded, so incremeant
403 * the specific header field, and return to the caller */
405 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
410 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
413 /* The record is too large for one packet, so create a larger packet */
415 avahi_dns_packet_free(reply);
416 size = avahi_record_get_estimate_size(r) + AVAHI_DNS_PACKET_HEADER_SIZE;
417 if (size > AVAHI_DNS_PACKET_MAX_SIZE)
418 size = AVAHI_DNS_PACKET_MAX_SIZE;
419 reply = avahi_dns_packet_new_reply(p, size, FALSE, TRUE);
421 if (!avahi_dns_packet_append_record(reply, r, flush_cache, 0)) {
422 avahi_dns_packet_free(reply);
424 gchar *t = avahi_record_to_string(r);
425 g_warning("Record [%s] too large, doesn't fit in any packet!", t);
429 avahi_dns_packet_inc_field(reply, AVAHI_DNS_FIELD_ANCOUNT);
432 /* Appending the record didn't succeeed, so let's send this packet, and create a new one */
433 avahi_interface_send_packet_unicast(i, reply, a, port);
434 avahi_dns_packet_free(reply);
439 avahi_record_unref(r);
443 if (avahi_dns_packet_get_field(reply, AVAHI_DNS_FIELD_ANCOUNT) != 0)
444 avahi_interface_send_packet_unicast(i, reply, a, port);
445 avahi_dns_packet_free(reply);
449 avahi_record_list_flush(s->record_list);
452 static void handle_query(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a, guint16 port, gboolean legacy_unicast) {
460 /* g_message("query"); */
462 g_assert(avahi_record_list_empty(s->record_list));
464 /* Handle the questions */
465 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); n > 0; n --) {
467 gboolean unicast_response = FALSE;
469 if (!(key = avahi_dns_packet_consume_key(p, &unicast_response))) {
470 g_warning("Packet too short (1)");
474 avahi_query_scheduler_incoming(i->query_scheduler, key);
475 avahi_server_prepare_matching_responses(s, i, key, unicast_response);
476 avahi_key_unref(key);
479 /* Known Answer Suppression */
480 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT); n > 0; n --) {
482 gboolean unique = FALSE;
484 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
485 g_warning("Packet too short (2)");
489 if (handle_conflict(s, i, record, unique, a)) {
490 avahi_response_scheduler_suppress(i->response_scheduler, record, a);
491 avahi_record_list_drop(s->record_list, record);
494 avahi_record_unref(record);
498 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT); n > 0; n --) {
500 gboolean unique = FALSE;
502 if (!(record = avahi_dns_packet_consume_record(p, &unique))) {
503 g_warning("Packet too short (3)");
507 if (record->key->type != AVAHI_DNS_TYPE_ANY)
508 incoming_probe(s, record, i);
510 avahi_record_unref(record);
513 if (!avahi_record_list_empty(s->record_list))
514 avahi_server_generate_response(s, i, p, a, port, legacy_unicast);
519 avahi_record_list_flush(s->record_list);
523 static void handle_response(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i, const AvahiAddress *a) {
531 /* g_message("response"); */
533 for (n = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
534 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); n > 0; n--) {
536 gboolean cache_flush = FALSE;
539 if (!(record = avahi_dns_packet_consume_record(p, &cache_flush))) {
540 g_warning("Packet too short (4)");
544 if (record->key->type != AVAHI_DNS_TYPE_ANY) {
546 /* g_message("Handling response: %s", txt = avahi_record_to_string(record)); */
549 if (handle_conflict(s, i, record, cache_flush, a)) {
550 avahi_cache_update(i->cache, record, cache_flush, a);
551 avahi_response_scheduler_incoming(i->response_scheduler, record, cache_flush);
555 avahi_record_unref(record);
559 static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, struct sockaddr *sa, gint iface, gint ttl) {
569 if (!(i = avahi_interface_monitor_get_interface(s->monitor, iface, sa->sa_family)) ||
570 !avahi_interface_relevant(i)) {
571 g_warning("Recieved packet from invalid interface.");
575 /* g_message("new packet recieved on interface '%s.%i'.", i->hardware->name, i->protocol); */
577 if (sa->sa_family == AF_INET6) {
578 static const guint8 ipv4_in_ipv6[] = {
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00,
581 0xFF, 0xFF, 0xFF, 0xFF };
583 /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
585 if (memcmp(((struct sockaddr_in6*) sa)->sin6_addr.s6_addr, ipv4_in_ipv6, sizeof(ipv4_in_ipv6)) == 0)
589 if (avahi_dns_packet_check_valid(p) < 0) {
590 g_warning("Recieved invalid packet.");
594 port = avahi_port_from_sockaddr(sa);
595 avahi_address_from_sockaddr(sa, &a);
597 if (avahi_dns_packet_is_query(p)) {
598 gboolean legacy_unicast = FALSE;
600 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT) != 0) {
601 g_warning("Invalid query packet.");
605 if (port != AVAHI_MDNS_PORT) {
608 if ((avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) != 0 ||
609 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0)) {
610 g_warning("Invalid legacy unicast query packet.");
614 legacy_unicast = TRUE;
617 handle_query(s, p, i, &a, port, legacy_unicast);
619 /* g_message("Handled query"); */
622 if (port != AVAHI_MDNS_PORT) {
623 g_warning("Recieved repsonse with invalid source port %u on interface '%s.%i'", port, i->hardware->name, i->protocol);
628 g_warning("Recieved response with invalid TTL %u on interface '%s.%i'.", ttl, i->hardware->name, i->protocol);
629 if (s->config.check_response_ttl)
633 if (avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT) != 0 ||
634 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0 ||
635 avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) != 0) {
636 g_warning("Invalid response packet.");
640 handle_response(s, p, i, &a);
641 /* g_message("Handled response"); */
645 static void work(AvahiServer *s) {
646 struct sockaddr_in6 sa6;
647 struct sockaddr_in sa;
654 if (s->pollfd_ipv4.revents & G_IO_IN) {
655 if ((p = avahi_recv_dns_packet_ipv4(s->fd_ipv4, &sa, &iface, &ttl))) {
656 dispatch_packet(s, p, (struct sockaddr*) &sa, iface, ttl);
657 avahi_dns_packet_free(p);
661 if (s->pollfd_ipv6.revents & G_IO_IN) {
662 if ((p = avahi_recv_dns_packet_ipv6(s->fd_ipv6, &sa6, &iface, &ttl))) {
663 dispatch_packet(s, p, (struct sockaddr*) &sa6, iface, ttl);
664 avahi_dns_packet_free(p);
669 static gboolean prepare_func(GSource *source, gint *timeout) {
677 static gboolean check_func(GSource *source) {
681 s = *((AvahiServer**) (((guint8*) source) + sizeof(GSource)));
684 return (s->pollfd_ipv4.revents | s->pollfd_ipv6.revents) & (G_IO_IN | G_IO_HUP | G_IO_ERR);
687 static gboolean dispatch_func(GSource *source, GSourceFunc callback, gpointer user_data) {
691 s = *((AvahiServer**) (((guint8*) source) + sizeof(GSource)));
700 static void server_set_state(AvahiServer *s, AvahiServerState state) {
703 if (s->state == state)
709 s->callback(s, state, s->userdata);
712 static void withdraw_host_rrs(AvahiServer *s) {
715 if (s->hinfo_entry_group) {
716 avahi_entry_group_free(s->hinfo_entry_group);
717 s->hinfo_entry_group = NULL;
720 avahi_update_host_rrs(s->monitor, TRUE);
721 s->n_host_rr_pending = 0;
724 void avahi_server_decrease_host_rr_pending(AvahiServer *s) {
727 g_assert(s->n_host_rr_pending > 0);
729 if (--s->n_host_rr_pending == 0)
730 server_set_state(s, AVAHI_SERVER_RUNNING);
733 void avahi_server_increase_host_rr_pending(AvahiServer *s) {
736 s->n_host_rr_pending ++;
739 void avahi_host_rr_entry_group_callback(AvahiServer *s, AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
743 if (state == AVAHI_ENTRY_GROUP_REGISTERING &&
744 s->state == AVAHI_SERVER_REGISTERING)
745 avahi_server_increase_host_rr_pending(s);
746 else if (state == AVAHI_ENTRY_GROUP_COLLISION) {
747 withdraw_host_rrs(s);
748 server_set_state(s, AVAHI_SERVER_COLLISION);
749 } else if (state == AVAHI_ENTRY_GROUP_ESTABLISHED &&
750 s->state == AVAHI_SERVER_REGISTERING)
751 avahi_server_decrease_host_rr_pending(s);
754 static void register_hinfo(AvahiServer *s) {
755 struct utsname utsname;
760 if (!s->config.register_hinfo || s->hinfo_entry_group)
763 s->hinfo_entry_group = avahi_entry_group_new(s, avahi_host_rr_entry_group_callback, NULL);
765 /* Fill in HINFO rr */
766 r = avahi_record_new_full(s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO);
768 r->data.hinfo.cpu = g_strdup(g_strup(utsname.machine));
769 r->data.hinfo.os = g_strdup(g_strup(utsname.sysname));
770 avahi_server_add(s, s->hinfo_entry_group, 0, AF_UNSPEC, AVAHI_ENTRY_UNIQUE, r);
771 avahi_record_unref(r);
773 avahi_entry_group_commit(s->hinfo_entry_group);
776 static void register_localhost(AvahiServer *s) {
780 /* Add localhost entries */
781 avahi_address_parse("127.0.0.1", AF_INET, &a);
782 avahi_server_add_address(s, NULL, 0, AF_UNSPEC, AVAHI_ENTRY_NOPROBE|AVAHI_ENTRY_NOANNOUNCE, "localhost", &a);
784 avahi_address_parse("::1", AF_INET6, &a);
785 avahi_server_add_address(s, NULL, 0, AF_UNSPEC, AVAHI_ENTRY_NOPROBE|AVAHI_ENTRY_NOANNOUNCE, "ip6-localhost", &a);
788 static void register_stuff(AvahiServer *s) {
791 server_set_state(s, AVAHI_SERVER_REGISTERING);
793 avahi_update_host_rrs(s->monitor, FALSE);
795 if (s->n_host_rr_pending == 0)
796 server_set_state(s, AVAHI_SERVER_RUNNING);
799 static void update_fqdn(AvahiServer *s) {
802 g_assert(s->host_name);
803 g_assert(s->domain_name);
805 g_free(s->host_name_fqdn);
806 s->host_name_fqdn = g_strdup_printf("%s.%s", s->host_name, s->domain_name);
809 void avahi_server_set_host_name(AvahiServer *s, const gchar *host_name) {
813 withdraw_host_rrs(s);
815 g_free(s->host_name);
816 s->host_name = host_name ? avahi_normalize_name(host_name) : avahi_get_host_name();
817 s->host_name[strcspn(s->host_name, ".")] = 0;
823 void avahi_server_set_domain_name(AvahiServer *s, const gchar *domain_name) {
825 g_assert(domain_name);
827 withdraw_host_rrs(s);
829 g_free(s->domain_name);
830 s->domain_name = domain_name ? avahi_normalize_name(domain_name) : g_strdup("local.");
836 AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc, AvahiServerCallback callback, gpointer userdata) {
839 static GSourceFuncs source_funcs = {
848 s = g_new(AvahiServer, 1);
849 s->n_host_rr_pending = 0;
850 s->need_entry_cleanup = s->need_group_cleanup = FALSE;
853 avahi_server_config_copy(&s->config, sc);
855 avahi_server_config_init(&s->config);
857 s->fd_ipv4 = s->config.use_ipv4 ? avahi_open_socket_ipv4() : -1;
858 s->fd_ipv6 = s->config.use_ipv6 ? avahi_open_socket_ipv6() : -1;
860 if (s->fd_ipv6 < 0 && s->fd_ipv4 < 0) {
861 g_critical("Selected neither IPv6 nor IPv4 support, aborting.\n");
862 avahi_server_config_free(&s->config);
867 if (s->fd_ipv4 < 0 && s->config.use_ipv4)
868 g_message("Failed to create IPv4 socket, proceeding in IPv6 only mode");
869 else if (s->fd_ipv6 < 0 && s->config.use_ipv6)
870 g_message("Failed to create IPv6 socket, proceeding in IPv4 only mode");
873 g_main_context_ref(s->context = c);
875 s->context = g_main_context_default();
877 /* Prepare IO source registration */
878 s->source = g_source_new(&source_funcs, sizeof(GSource) + sizeof(AvahiServer*));
879 *((AvahiServer**) (((guint8*) s->source) + sizeof(GSource))) = s;
881 memset(&s->pollfd_ipv4, 0, sizeof(s->pollfd_ipv4));
882 s->pollfd_ipv4.fd = s->fd_ipv4;
883 s->pollfd_ipv4.events = G_IO_IN|G_IO_ERR|G_IO_HUP;
884 g_source_add_poll(s->source, &s->pollfd_ipv4);
886 memset(&s->pollfd_ipv6, 0, sizeof(s->pollfd_ipv6));
887 s->pollfd_ipv6.fd = s->fd_ipv6;
888 s->pollfd_ipv6.events = G_IO_IN|G_IO_ERR|G_IO_HUP;
889 g_source_add_poll(s->source, &s->pollfd_ipv6);
891 g_source_attach(s->source, s->context);
893 s->callback = callback;
894 s->userdata = userdata;
896 AVAHI_LLIST_HEAD_INIT(AvahiEntry, s->entries);
897 s->entries_by_key = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal);
898 AVAHI_LLIST_HEAD_INIT(AvahiGroup, s->groups);
900 AVAHI_LLIST_HEAD_INIT(AvahiSubscription, s->subscriptions);
901 s->subscription_hashtable = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal);
904 s->host_name = s->config.host_name ? avahi_normalize_name(s->config.host_name) : avahi_get_host_name();
905 s->host_name[strcspn(s->host_name, ".")] = 0;
906 s->domain_name = s->config.domain_name ? avahi_normalize_name(s->config.domain_name) : g_strdup("local.");
907 s->host_name_fqdn = NULL;
910 s->record_list = avahi_record_list_new();
912 s->time_event_queue = avahi_time_event_queue_new(s->context, G_PRIORITY_DEFAULT+10); /* Slightly less priority than the FDs */
914 s->state = AVAHI_SERVER_INVALID;
916 s->monitor = avahi_interface_monitor_new(s);
917 avahi_interface_monitor_sync(s->monitor);
919 register_localhost(s);
921 s->hinfo_entry_group = NULL;
927 void avahi_server_free(AvahiServer* s) {
931 free_entry(s, s->entries);
933 avahi_interface_monitor_free(s->monitor);
936 free_group(s, s->groups);
938 while (s->subscriptions)
939 avahi_subscription_free(s->subscriptions);
940 g_hash_table_destroy(s->subscription_hashtable);
942 g_hash_table_destroy(s->entries_by_key);
944 avahi_time_event_queue_free(s->time_event_queue);
946 avahi_record_list_free(s->record_list);
953 g_free(s->host_name);
954 g_free(s->domain_name);
955 g_free(s->host_name_fqdn);
957 g_source_destroy(s->source);
958 g_source_unref(s->source);
959 g_main_context_unref(s->context);
961 avahi_server_config_free(&s->config);
966 void avahi_server_add(
971 AvahiEntryFlags flags,
978 g_assert(r->key->type != AVAHI_DNS_TYPE_ANY);
980 e = g_new(AvahiEntry, 1);
982 e->record = avahi_record_ref(r);
984 e->interface = interface;
985 e->protocol = protocol;
989 AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, e->announcements);
991 AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
993 /* Insert into hash table indexed by name */
994 t = g_hash_table_lookup(s->entries_by_key, e->record->key);
995 AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
996 g_hash_table_replace(s->entries_by_key, e->record->key, t);
998 /* Insert into group list */
1000 AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
1002 avahi_announce_entry(s, e);
1004 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiEntryGroup *g, void **state) {
1005 AvahiEntry **e = (AvahiEntry**) state;
1010 *e = g ? g->entries : s->entries;
1012 while (*e && (*e)->dead)
1013 *e = g ? (*e)->by_group_next : (*e)->entries_next;
1018 return avahi_record_ref((*e)->record);
1021 void avahi_server_dump(AvahiServer *s, FILE *f) {
1026 fprintf(f, "\n;;; ZONE DUMP FOLLOWS ;;;\n");
1028 for (e = s->entries; e; e = e->entries_next) {
1034 t = avahi_record_to_string(e->record);
1035 fprintf(f, "%s ; iface=%i proto=%i\n", t, e->interface, e->protocol);
1039 avahi_dump_caches(s->monitor, f);
1042 void avahi_server_add_ptr(
1047 AvahiEntryFlags flags,
1049 const gchar *dest) {
1055 r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR);
1056 r->data.ptr.name = avahi_normalize_name(dest);
1057 avahi_server_add(s, g, interface, protocol, flags, r);
1058 avahi_record_unref(r);
1061 void avahi_server_add_address(
1066 AvahiEntryFlags flags,
1074 name = name ? (n = avahi_normalize_name(name)) : s->host_name_fqdn;
1076 if (a->family == AF_INET) {
1080 r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
1081 r->data.a.address = a->data.ipv4;
1082 avahi_server_add(s, g, interface, protocol, flags | AVAHI_ENTRY_UNIQUE, r);
1083 avahi_record_unref(r);
1085 reverse = avahi_reverse_lookup_name_ipv4(&a->data.ipv4);
1086 avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_ENTRY_UNIQUE, reverse, name);
1093 r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
1094 r->data.aaaa.address = a->data.ipv6;
1095 avahi_server_add(s, g, interface, protocol, flags | AVAHI_ENTRY_UNIQUE, r);
1096 avahi_record_unref(r);
1098 reverse = avahi_reverse_lookup_name_ipv6_arpa(&a->data.ipv6);
1099 avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_ENTRY_UNIQUE, reverse, name);
1102 reverse = avahi_reverse_lookup_name_ipv6_int(&a->data.ipv6);
1103 avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_ENTRY_UNIQUE, reverse, name);
1110 void avahi_server_add_text_strlst(
1115 AvahiEntryFlags flags,
1117 AvahiStringList *strlst) {
1123 r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT);
1124 r->data.txt.string_list = strlst;
1125 avahi_server_add(s, g, interface, protocol, flags, r);
1126 avahi_record_unref(r);
1129 void avahi_server_add_text_va(
1134 AvahiEntryFlags flags,
1140 avahi_server_add_text_strlst(s, g, interface, protocol, flags, name, avahi_string_list_new_va(va));
1143 void avahi_server_add_text(
1148 AvahiEntryFlags flags,
1157 avahi_server_add_text_va(s, g, interface, protocol, flags, name, va);
1161 static void escape_service_name(gchar *d, guint size, const gchar *s) {
1166 while (*s && size >= 2) {
1167 if (*s == '.' || *s == '\\') {
1183 void avahi_server_add_service_strlst(
1190 const gchar *domain,
1193 AvahiStringList *strlst) {
1195 gchar ptr_name[256], svc_name[256], ename[64], enum_ptr[256];
1202 escape_service_name(ename, sizeof(ename), name);
1205 while (domain[0] == '.')
1211 host = s->host_name_fqdn;
1213 snprintf(ptr_name, sizeof(ptr_name), "%s.%s", type, domain);
1214 snprintf(svc_name, sizeof(svc_name), "%s.%s.%s", ename, type, domain);
1216 avahi_server_add_ptr(s, g, interface, protocol, AVAHI_ENTRY_NULL, ptr_name, svc_name);
1218 r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV);
1219 r->data.srv.priority = 0;
1220 r->data.srv.weight = 0;
1221 r->data.srv.port = port;
1222 r->data.srv.name = avahi_normalize_name(host);
1223 avahi_server_add(s, g, interface, protocol, AVAHI_ENTRY_UNIQUE, r);
1224 avahi_record_unref(r);
1226 avahi_server_add_text_strlst(s, g, interface, protocol, AVAHI_ENTRY_UNIQUE, svc_name, strlst);
1228 snprintf(enum_ptr, sizeof(enum_ptr), "_services._dns-sd._udp.%s", domain);
1229 avahi_server_add_ptr(s, g, interface, protocol, AVAHI_ENTRY_NULL, enum_ptr, ptr_name);
1232 void avahi_server_add_service_va(
1239 const gchar *domain,
1248 avahi_server_add_service_strlst(s, g, interface, protocol, type, name, domain, host, port, avahi_string_list_new_va(va));
1251 void avahi_server_add_service(
1258 const gchar *domain,
1270 avahi_server_add_service_va(s, g, interface, protocol, type, name, domain, host, port, va);
1274 static void post_query_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, gpointer userdata) {
1275 AvahiKey *k = userdata;
1281 avahi_interface_post_query(i, k, FALSE);
1284 void avahi_server_post_query(AvahiServer *s, gint interface, guchar protocol, AvahiKey *key) {
1288 avahi_interface_monitor_walk(s->monitor, interface, protocol, post_query_callback, key);
1291 void avahi_entry_group_change_state(AvahiEntryGroup *g, AvahiEntryGroupState state) {
1294 if (g->state == state)
1300 g->callback(g->server, g, state, g->userdata);
1305 AvahiEntryGroup *avahi_entry_group_new(AvahiServer *s, AvahiEntryGroupCallback callback, gpointer userdata) {
1310 g = g_new(AvahiEntryGroup, 1);
1312 g->callback = callback;
1313 g->userdata = userdata;
1315 g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
1317 AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
1319 AVAHI_LLIST_PREPEND(AvahiEntryGroup, groups, s->groups, g);
1323 void avahi_entry_group_free(AvahiEntryGroup *g) {
1325 g_assert(g->server);
1328 g->server->need_group_cleanup = TRUE;
1331 void avahi_entry_group_commit(AvahiEntryGroup *g) {
1335 if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)
1338 avahi_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
1339 avahi_announce_group(g->server, g);
1340 avahi_entry_group_check_probed(g, FALSE);
1343 gboolean avahi_entry_commited(AvahiEntry *e) {
1348 e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
1349 e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
1352 AvahiEntryGroupState avahi_entry_group_get_state(AvahiEntryGroup *g) {
1359 void avahi_entry_group_set_data(AvahiEntryGroup *g, gpointer userdata) {
1362 g->userdata = userdata;
1365 gpointer avahi_entry_group_get_data(AvahiEntryGroup *g) {
1371 const gchar* avahi_server_get_domain_name(AvahiServer *s) {
1374 return s->domain_name;
1377 const gchar* avahi_server_get_host_name(AvahiServer *s) {
1380 return s->host_name;
1383 const gchar* avahi_server_get_host_name_fqdn(AvahiServer *s) {
1386 return s->host_name_fqdn;
1389 gpointer avahi_server_get_data(AvahiServer *s) {
1395 void avahi_server_set_data(AvahiServer *s, gpointer userdata) {
1398 s->userdata = userdata;
1401 AvahiServerState avhai_server_get_state(AvahiServer *s) {
1407 AvahiServerConfig* avahi_server_config_init(AvahiServerConfig *c) {
1410 memset(c, 0, sizeof(AvahiServerConfig));
1411 c->register_hinfo = TRUE;
1412 c->register_addresses = TRUE;
1415 c->host_name = NULL;
1416 c->domain_name = NULL;
1417 c->check_response_ttl = TRUE;
1422 void avahi_server_config_free(AvahiServerConfig *c) {
1425 g_assert(c->host_name);
1426 g_assert(c->domain_name);
1430 AvahiServerConfig* avahi_server_config_copy(AvahiServerConfig *ret, const AvahiServerConfig *c) {
1436 ret->host_name = g_strdup(c->host_name);
1437 ret->domain_name = g_strdup(c->domain_name);