| /*** |
| This file is part of avahi. |
| |
| avahi is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| avahi is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General |
| Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with avahi; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| USA. |
| ***/ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <string.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <assert.h> |
| #include <stdlib.h> |
| |
| #include <arpa/inet.h> |
| |
| #include <sys/utsname.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| #include <avahi-common/domain.h> |
| #include <avahi-common/timeval.h> |
| #include <avahi-common/malloc.h> |
| #include <avahi-common/error.h> |
| #include <avahi-common/domain.h> |
| |
| #include "internal.h" |
| #include "iface.h" |
| #include "socket.h" |
| #include "browse.h" |
| #include "log.h" |
| #include "util.h" |
| #include "dns-srv-rr.h" |
| #include "rr-util.h" |
| #include "domain-util.h" |
| |
| static void transport_flags_from_domain(AvahiServer *s, AvahiPublishFlags *flags, const char *domain) { |
| assert(flags); |
| assert(domain); |
| |
| assert(!((*flags & AVAHI_PUBLISH_USE_MULTICAST) && (*flags & AVAHI_PUBLISH_USE_WIDE_AREA))); |
| |
| if (*flags & (AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA)) |
| return; |
| |
| if (!s->wide_area_lookup_engine || |
| !avahi_wide_area_has_servers(s->wide_area_lookup_engine) || |
| avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_LOCAL) || |
| avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV4) || |
| avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV6)) |
| *flags |= AVAHI_PUBLISH_USE_MULTICAST; |
| else |
| *flags |= AVAHI_PUBLISH_USE_WIDE_AREA; |
| } |
| |
| void avahi_entry_free(AvahiServer*s, AvahiEntry *e) { |
| AvahiEntry *t; |
| |
| assert(s); |
| assert(e); |
| |
| avahi_goodbye_entry(s, e, 1, 1); |
| |
| /* Remove from linked list */ |
| AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e); |
| |
| /* Remove from hash table indexed by name */ |
| t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); |
| AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e); |
| if (t) |
| avahi_hashmap_replace(s->entries_by_key, t->record->key, t); |
| else |
| avahi_hashmap_remove(s->entries_by_key, e->record->key); |
| |
| /* Remove from associated group */ |
| if (e->group) |
| AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e); |
| |
| avahi_record_unref(e->record); |
| avahi_free(e); |
| } |
| |
| void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) { |
| assert(s); |
| assert(g); |
| |
| while (g->entries) |
| avahi_entry_free(s, g->entries); |
| |
| if (g->register_time_event) |
| avahi_time_event_free(g->register_time_event); |
| |
| AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g); |
| avahi_free(g); |
| } |
| |
| void avahi_cleanup_dead_entries(AvahiServer *s) { |
| assert(s); |
| |
| if (s->need_group_cleanup) { |
| AvahiSEntryGroup *g, *next; |
| |
| for (g = s->groups; g; g = next) { |
| next = g->groups_next; |
| |
| if (g->dead) |
| avahi_entry_group_free(s, g); |
| } |
| |
| s->need_group_cleanup = 0; |
| } |
| |
| if (s->need_entry_cleanup) { |
| AvahiEntry *e, *next; |
| |
| for (e = s->entries; e; e = next) { |
| next = e->entries_next; |
| |
| if (e->dead) |
| avahi_entry_free(s, e); |
| } |
| |
| s->need_entry_cleanup = 0; |
| } |
| |
| if (s->need_browser_cleanup) |
| avahi_browser_cleanup(s); |
| |
| if (s->cleanup_time_event) { |
| avahi_time_event_free(s->cleanup_time_event); |
| s->cleanup_time_event = NULL; |
| } |
| } |
| |
| static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) { |
| AvahiEntry *e; |
| |
| assert(s); |
| assert(r); |
| |
| for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { |
| if (e->dead) |
| continue; |
| |
| if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE)) |
| continue; |
| |
| if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) ) |
| continue; |
| |
| if (avahi_record_equal_no_ttl(r, e->record)) { |
| /* The records are the same, not a conflict in any case */ |
| continue; |
| } |
| |
| if ((interface <= 0 || |
| e->interface <= 0 || |
| e->interface == interface) && |
| (protocol == AVAHI_PROTO_UNSPEC || |
| e->protocol == AVAHI_PROTO_UNSPEC || |
| e->protocol == protocol)) |
| |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static AvahiEntry * server_add_internal( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| AvahiRecord *r) { |
| |
| AvahiEntry *e; |
| |
| assert(s); |
| assert(r); |
| |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, s->state != AVAHI_SERVER_FAILURE && s->state != AVAHI_SERVER_INVALID, AVAHI_ERR_BAD_STATE); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID( |
| flags, |
| AVAHI_PUBLISH_NO_ANNOUNCE| |
| AVAHI_PUBLISH_NO_PROBE| |
| AVAHI_PUBLISH_UNIQUE| |
| AVAHI_PUBLISH_ALLOW_MULTIPLE| |
| AVAHI_PUBLISH_UPDATE| |
| AVAHI_PUBLISH_USE_WIDE_AREA| |
| AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, |
| (r->key->type != 0) && |
| (r->key->type != AVAHI_DNS_TYPE_ANY) && |
| (r->key->type != AVAHI_DNS_TYPE_OPT) && |
| (r->key->type != AVAHI_DNS_TYPE_TKEY) && |
| (r->key->type != AVAHI_DNS_TYPE_TSIG) && |
| (r->key->type != AVAHI_DNS_TYPE_IXFR) && |
| (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE); |
| |
| transport_flags_from_domain(s, &flags, r->key->name); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !s->config.disable_publishing, AVAHI_ERR_NOT_PERMITTED); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, |
| !g || |
| (g->state != AVAHI_ENTRY_GROUP_ESTABLISHED && g->state != AVAHI_ENTRY_GROUP_REGISTERING) || |
| (flags & AVAHI_PUBLISH_UPDATE), AVAHI_ERR_BAD_STATE); |
| |
| if (flags & AVAHI_PUBLISH_UPDATE) { |
| AvahiRecord *old_record; |
| int is_first = 1; |
| |
| /* Update and existing record */ |
| |
| /* Find the first matching entry */ |
| for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { |
| if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol) |
| break; |
| |
| is_first = 0; |
| } |
| |
| /* Hmm, nothing found? */ |
| if (!e) { |
| avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND); |
| return NULL; |
| } |
| |
| /* Update the entry */ |
| old_record = e->record; |
| e->record = avahi_record_ref(r); |
| e->flags = flags; |
| |
| /* Announce our changes when needed */ |
| if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) { |
| |
| /* Remove the old entry from all caches, if needed */ |
| if (!(e->flags & AVAHI_PUBLISH_UNIQUE)) |
| avahi_goodbye_entry(s, e, 1, 0); |
| |
| /* Reannounce our updated entry */ |
| avahi_reannounce_entry(s, e); |
| } |
| |
| /* If we were the first entry in the list, we need to update the key */ |
| if (is_first) |
| avahi_hashmap_replace(s->entries_by_key, e->record->key, e); |
| |
| avahi_record_unref(old_record); |
| |
| } else { |
| AvahiEntry *t; |
| |
| /* Add a new record */ |
| |
| if (check_record_conflict(s, interface, protocol, r, flags) < 0) { |
| avahi_server_set_errno(s, AVAHI_ERR_COLLISION); |
| return NULL; |
| } |
| |
| if (!(e = avahi_new(AvahiEntry, 1))) { |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| e->server = s; |
| e->record = avahi_record_ref(r); |
| e->group = g; |
| e->interface = interface; |
| e->protocol = protocol; |
| e->flags = flags; |
| e->dead = 0; |
| |
| AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers); |
| |
| AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e); |
| |
| /* Insert into hash table indexed by name */ |
| t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); |
| AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e); |
| avahi_hashmap_replace(s->entries_by_key, e->record->key, t); |
| |
| /* Insert into group list */ |
| if (g) |
| AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e); |
| |
| avahi_announce_entry(s, e); |
| } |
| |
| return e; |
| } |
| |
| int avahi_server_add( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| AvahiRecord *r) { |
| |
| if (!server_add_internal(s, g, interface, protocol, flags, r)) |
| return avahi_server_errno(s); |
| |
| return AVAHI_OK; |
| } |
| |
| const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) { |
| AvahiEntry **e = (AvahiEntry**) state; |
| assert(s); |
| assert(e); |
| |
| if (!*e) |
| *e = g ? g->entries : s->entries; |
| |
| while (*e && (*e)->dead) |
| *e = g ? (*e)->by_group_next : (*e)->entries_next; |
| |
| if (!*e) |
| return NULL; |
| |
| return avahi_record_ref((*e)->record); |
| } |
| |
| int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) { |
| AvahiEntry *e; |
| |
| assert(s); |
| assert(callback); |
| |
| callback(";;; ZONE DUMP FOLLOWS ;;;", userdata); |
| |
| for (e = s->entries; e; e = e->entries_next) { |
| char *t; |
| char ln[256]; |
| |
| if (e->dead) |
| continue; |
| |
| if (!(t = avahi_record_to_string(e->record))) |
| return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| |
| snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol); |
| avahi_free(t); |
| |
| callback(ln, userdata); |
| } |
| |
| avahi_dump_caches(s->monitor, callback, userdata); |
| |
| if (s->wide_area_lookup_engine) |
| avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata); |
| return AVAHI_OK; |
| } |
| |
| static AvahiEntry *server_add_ptr_internal( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| uint32_t ttl, |
| const char *name, |
| const char *dest) { |
| |
| AvahiRecord *r; |
| AvahiEntry *e; |
| |
| assert(s); |
| assert(dest); |
| |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME); |
| |
| if (!name) |
| name = s->host_name_fqdn; |
| |
| if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) { |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| r->data.ptr.name = avahi_normalize_name_strdup(dest); |
| e = server_add_internal(s, g, interface, protocol, flags, r); |
| avahi_record_unref(r); |
| return e; |
| } |
| |
| int avahi_server_add_ptr( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| uint32_t ttl, |
| const char *name, |
| const char *dest) { |
| |
| AvahiEntry *e; |
| |
| assert(s); |
| |
| if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest))) |
| return avahi_server_errno(s); |
| |
| return AVAHI_OK; |
| } |
| |
| int avahi_server_add_address( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| AvahiAddress *a) { |
| |
| char n[AVAHI_DOMAIN_NAME_MAX]; |
| int ret = AVAHI_OK; |
| AvahiEntry *entry = NULL, *reverse = NULL; |
| AvahiRecord *r; |
| |
| assert(s); |
| assert(a); |
| |
| AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, |
| AVAHI_PUBLISH_NO_REVERSE| |
| AVAHI_PUBLISH_NO_ANNOUNCE| |
| AVAHI_PUBLISH_NO_PROBE| |
| AVAHI_PUBLISH_UPDATE| |
| AVAHI_PUBLISH_USE_WIDE_AREA| |
| AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME); |
| |
| /* Prepare the host naem */ |
| |
| if (!name) |
| name = s->host_name_fqdn; |
| else { |
| AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n))); |
| name = n; |
| } |
| |
| transport_flags_from_domain(s, &flags, name); |
| AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| /* Create the A/AAAA record */ |
| |
| if (a->proto == AVAHI_PROTO_INET) { |
| |
| if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) { |
| ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| goto finish; |
| } |
| |
| r->data.a.address = a->data.ipv4; |
| |
| } else { |
| assert(a->proto == AVAHI_PROTO_INET6); |
| |
| if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) { |
| ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| goto finish; |
| } |
| |
| r->data.aaaa.address = a->data.ipv6; |
| } |
| |
| entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); |
| avahi_record_unref(r); |
| |
| if (!entry) { |
| ret = avahi_server_errno(s); |
| goto finish; |
| } |
| |
| /* Create the reverse lookup entry */ |
| |
| if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) { |
| char reverse_n[AVAHI_DOMAIN_NAME_MAX]; |
| avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n)); |
| |
| if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) { |
| ret = avahi_server_errno(s); |
| goto finish; |
| } |
| } |
| |
| finish: |
| |
| if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) { |
| if (entry) |
| avahi_entry_free(s, entry); |
| if (reverse) |
| avahi_entry_free(s, reverse); |
| } |
| |
| return ret; |
| } |
| |
| static AvahiEntry *server_add_txt_strlst_nocopy( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| uint32_t ttl, |
| const char *name, |
| AvahiStringList *strlst) { |
| |
| AvahiRecord *r; |
| AvahiEntry *e; |
| |
| assert(s); |
| |
| if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) { |
| avahi_string_list_free(strlst); |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| r->data.txt.string_list = strlst; |
| e = server_add_internal(s, g, interface, protocol, flags, r); |
| avahi_record_unref(r); |
| |
| return e; |
| } |
| |
| static AvahiStringList *add_magic_cookie( |
| AvahiServer *s, |
| AvahiStringList *strlst) { |
| |
| assert(s); |
| |
| if (!s->config.add_service_cookie) |
| return strlst; |
| |
| if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE)) |
| /* This string list already contains a magic cookie */ |
| return strlst; |
| |
| return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie); |
| } |
| |
| static int server_add_service_strlst_nocopy( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| const char *host, |
| uint16_t port, |
| AvahiStringList *strlst) { |
| |
| char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL; |
| AvahiRecord *r = NULL; |
| int ret = AVAHI_OK; |
| AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL; |
| |
| assert(s); |
| assert(type); |
| assert(name); |
| |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, |
| AVAHI_PUBLISH_NO_COOKIE| |
| AVAHI_PUBLISH_UPDATE| |
| AVAHI_PUBLISH_USE_WIDE_AREA| |
| AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_fqdn(host), AVAHI_ERR_INVALID_HOST_NAME); |
| |
| if (!domain) |
| domain = s->domain_name; |
| |
| if (!host) |
| host = s->host_name_fqdn; |
| |
| transport_flags_from_domain(s, &flags, domain); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| if (!(h = avahi_normalize_name_strdup(host))) { |
| ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || |
| (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 || |
| (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) { |
| avahi_server_set_errno(s, ret); |
| goto fail; |
| } |
| |
| /* Add service enumeration PTR record */ |
| |
| if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) { |
| ret = avahi_server_errno(s); |
| goto fail; |
| } |
| |
| /* Add SRV record */ |
| |
| if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { |
| ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| r->data.srv.priority = 0; |
| r->data.srv.weight = 0; |
| r->data.srv.port = port; |
| r->data.srv.name = h; |
| h = NULL; |
| srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r); |
| avahi_record_unref(r); |
| |
| if (!srv_entry) { |
| ret = avahi_server_errno(s); |
| goto fail; |
| } |
| |
| /* Add TXT record */ |
| |
| if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) |
| strlst = add_magic_cookie(s, strlst); |
| |
| txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst); |
| strlst = NULL; |
| |
| if (!txt_entry) { |
| ret = avahi_server_errno(s); |
| goto fail; |
| } |
| |
| /* Add service type enumeration record */ |
| |
| if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) { |
| ret = avahi_server_errno(s); |
| goto fail; |
| } |
| |
| fail: |
| if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) { |
| if (srv_entry) |
| avahi_entry_free(s, srv_entry); |
| if (txt_entry) |
| avahi_entry_free(s, txt_entry); |
| if (ptr_entry) |
| avahi_entry_free(s, ptr_entry); |
| if (enum_entry) |
| avahi_entry_free(s, enum_entry); |
| } |
| |
| avahi_string_list_free(strlst); |
| avahi_free(h); |
| |
| return ret; |
| } |
| |
| int avahi_server_add_service_strlst( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| const char *host, |
| uint16_t port, |
| AvahiStringList *strlst) { |
| |
| assert(s); |
| assert(type); |
| assert(name); |
| |
| return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst)); |
| } |
| |
| int avahi_server_add_service( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| const char *host, |
| uint16_t port, |
| ... ){ |
| |
| va_list va; |
| int ret; |
| |
| va_start(va, port); |
| ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va)); |
| va_end(va); |
| |
| return ret; |
| } |
| |
| static int server_update_service_txt_strlst_nocopy( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| AvahiStringList *strlst) { |
| |
| char svc_name[AVAHI_DOMAIN_NAME_MAX]; |
| int ret = AVAHI_OK; |
| AvahiEntry *e; |
| |
| assert(s); |
| assert(type); |
| assert(name); |
| |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, |
| AVAHI_PUBLISH_NO_COOKIE| |
| AVAHI_PUBLISH_USE_WIDE_AREA| |
| AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| |
| if (!domain) |
| domain = s->domain_name; |
| |
| transport_flags_from_domain(s, &flags, domain); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) { |
| avahi_server_set_errno(s, ret); |
| goto fail; |
| } |
| |
| /* Add TXT record */ |
| if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) |
| strlst = add_magic_cookie(s, strlst); |
| |
| e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst); |
| strlst = NULL; |
| |
| if (!e) |
| ret = avahi_server_errno(s); |
| |
| fail: |
| |
| avahi_string_list_free(strlst); |
| |
| return ret; |
| } |
| |
| int avahi_server_update_service_txt_strlst( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| AvahiStringList *strlst) { |
| |
| return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst)); |
| } |
| |
| /** Update the TXT record for a service with the NULL termonate list of strings */ |
| int avahi_server_update_service_txt( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| ...) { |
| |
| va_list va; |
| int ret; |
| |
| va_start(va, domain); |
| ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va)); |
| va_end(va); |
| |
| return ret; |
| } |
| |
| int avahi_server_add_service_subtype( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *name, |
| const char *type, |
| const char *domain, |
| const char *subtype) { |
| |
| int ret = AVAHI_OK; |
| char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX]; |
| |
| assert(name); |
| assert(type); |
| assert(subtype); |
| |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE); |
| |
| if (!domain) |
| domain = s->domain_name; |
| |
| transport_flags_from_domain(s, &flags, domain); |
| AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || |
| (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) { |
| avahi_server_set_errno(s, ret); |
| goto fail; |
| } |
| |
| if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0) |
| goto fail; |
| |
| fail: |
| |
| return ret; |
| } |
| |
| static void hexstring(char *s, size_t sl, const void *p, size_t pl) { |
| static const char hex[] = "0123456789abcdef"; |
| int b = 0; |
| const uint8_t *k = p; |
| |
| while (sl > 1 && pl > 0) { |
| *(s++) = hex[(b ? *k : *k >> 4) & 0xF]; |
| |
| if (b) { |
| k++; |
| pl--; |
| } |
| |
| b = !b; |
| |
| sl--; |
| } |
| |
| if (sl > 0) |
| *s = 0; |
| } |
| |
| static AvahiEntry *server_add_dns_server_name( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *domain, |
| AvahiDNSServerType type, |
| const char *name, |
| uint16_t port /** should be 53 */) { |
| |
| AvahiEntry *e; |
| char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n; |
| |
| AvahiRecord *r; |
| |
| assert(s); |
| assert(name); |
| |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_WIDE_AREA|AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| |
| if (!domain) |
| domain = s->domain_name; |
| |
| transport_flags_from_domain(s, &flags, domain); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| if (!(n = avahi_normalize_name_strdup(name))) { |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d))); |
| |
| snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d); |
| |
| if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| avahi_free(n); |
| return NULL; |
| } |
| |
| r->data.srv.priority = 0; |
| r->data.srv.weight = 0; |
| r->data.srv.port = port; |
| r->data.srv.name = n; |
| e = server_add_internal(s, g, interface, protocol, 0, r); |
| avahi_record_unref(r); |
| |
| return e; |
| } |
| |
| int avahi_server_add_dns_server_address( |
| AvahiServer *s, |
| AvahiSEntryGroup *g, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiPublishFlags flags, |
| const char *domain, |
| AvahiDNSServerType type, |
| const AvahiAddress *address, |
| uint16_t port /** should be 53 */) { |
| |
| AvahiRecord *r; |
| char n[64], h[64]; |
| AvahiEntry *a_entry, *s_entry; |
| |
| assert(s); |
| assert(address); |
| |
| AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT); |
| AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| |
| if (!domain) |
| domain = s->domain_name; |
| |
| transport_flags_from_domain(s, &flags, domain); |
| AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED); |
| |
| if (address->proto == AVAHI_PROTO_INET) { |
| hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address)); |
| snprintf(n, sizeof(n), "ip-%s.%s", h, domain); |
| r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME); |
| r->data.a.address = address->data.ipv4; |
| } else { |
| hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address)); |
| snprintf(n, sizeof(n), "ip6-%s.%s", h, domain); |
| r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME); |
| r->data.aaaa.address = address->data.ipv6; |
| } |
| |
| if (!r) |
| return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| |
| a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); |
| avahi_record_unref(r); |
| |
| if (!a_entry) |
| return avahi_server_errno(s); |
| |
| if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) { |
| if (!(flags & AVAHI_PUBLISH_UPDATE)) |
| avahi_entry_free(s, a_entry); |
| return avahi_server_errno(s); |
| } |
| |
| return AVAHI_OK; |
| } |
| |
| void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) { |
| assert(g); |
| |
| if (g->state == state) |
| return; |
| |
| assert(state <= AVAHI_ENTRY_GROUP_COLLISION); |
| |
| if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) { |
| |
| /* If the entry group was established for a time longer then |
| * 5s, reset the establishment trial counter */ |
| |
| if (avahi_age(&g->established_at) > 5000000) |
| g->n_register_try = 0; |
| } else if (g->state == AVAHI_ENTRY_GROUP_REGISTERING) { |
| if (g->register_time_event) { |
| avahi_time_event_free(g->register_time_event); |
| g->register_time_event = NULL; |
| } |
| } |
| |
| if (state == AVAHI_ENTRY_GROUP_ESTABLISHED) |
| |
| /* If the entry group is now established, remember the time |
| * this happened */ |
| |
| gettimeofday(&g->established_at, NULL); |
| |
| g->state = state; |
| |
| if (g->callback) |
| g->callback(g->server, g, state, g->userdata); |
| } |
| |
| AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) { |
| AvahiSEntryGroup *g; |
| |
| assert(s); |
| |
| if (!(g = avahi_new(AvahiSEntryGroup, 1))) { |
| avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| g->server = s; |
| g->callback = callback; |
| g->userdata = userdata; |
| g->dead = 0; |
| g->state = AVAHI_ENTRY_GROUP_UNCOMMITED; |
| g->n_probing = 0; |
| g->n_register_try = 0; |
| g->register_time_event = NULL; |
| g->register_time.tv_sec = 0; |
| g->register_time.tv_usec = 0; |
| AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries); |
| |
| AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g); |
| return g; |
| } |
| |
| static void cleanup_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) { |
| AvahiServer *s = userdata; |
| |
| assert(s); |
| |
| avahi_cleanup_dead_entries(s); |
| } |
| |
| static void schedule_cleanup(AvahiServer *s) { |
| struct timeval tv; |
| |
| assert(s); |
| |
| if (!s->cleanup_time_event) |
| s->cleanup_time_event = avahi_time_event_new(s->time_event_queue, avahi_elapse_time(&tv, 1000, 0), &cleanup_time_event_callback, s); |
| } |
| |
| void avahi_s_entry_group_free(AvahiSEntryGroup *g) { |
| AvahiEntry *e; |
| |
| assert(g); |
| assert(g->server); |
| |
| for (e = g->entries; e; e = e->by_group_next) { |
| if (!e->dead) { |
| avahi_goodbye_entry(g->server, e, 1, 1); |
| e->dead = 1; |
| } |
| } |
| |
| if (g->register_time_event) { |
| avahi_time_event_free(g->register_time_event); |
| g->register_time_event = NULL; |
| } |
| |
| g->dead = 1; |
| |
| g->server->need_group_cleanup = 1; |
| g->server->need_entry_cleanup = 1; |
| |
| schedule_cleanup(g->server); |
| } |
| |
| static void entry_group_commit_real(AvahiSEntryGroup *g) { |
| assert(g); |
| |
| gettimeofday(&g->register_time, NULL); |
| |
| avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); |
| |
| if (g->dead) |
| return; |
| |
| avahi_announce_group(g->server, g); |
| avahi_s_entry_group_check_probed(g, 0); |
| } |
| |
| static void entry_group_register_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) { |
| AvahiSEntryGroup *g = userdata; |
| assert(g); |
| |
| avahi_time_event_free(g->register_time_event); |
| g->register_time_event = NULL; |
| |
| /* Holdoff time passed, so let's start probing */ |
| entry_group_commit_real(g); |
| } |
| |
| int avahi_s_entry_group_commit(AvahiSEntryGroup *g) { |
| struct timeval now; |
| |
| assert(g); |
| assert(!g->dead); |
| |
| if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION) |
| return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE); |
| |
| if (avahi_s_entry_group_is_empty(g)) |
| return avahi_server_set_errno(g->server, AVAHI_ERR_IS_EMPTY); |
| |
| g->n_register_try++; |
| |
| avahi_timeval_add(&g->register_time, |
| 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ? |
| AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT : |
| AVAHI_RR_HOLDOFF_MSEC)); |
| |
| gettimeofday(&now, NULL); |
| |
| if (avahi_timeval_compare(&g->register_time, &now) <= 0) { |
| |
| /* Holdoff time passed, so let's start probing */ |
| entry_group_commit_real(g); |
| } else { |
| |
| /* Holdoff time has not yet passed, so let's wait */ |
| assert(!g->register_time_event); |
| g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g); |
| |
| avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); |
| } |
| |
| return AVAHI_OK; |
| } |
| |
| void avahi_s_entry_group_reset(AvahiSEntryGroup *g) { |
| AvahiEntry *e; |
| assert(g); |
| |
| for (e = g->entries; e; e = e->by_group_next) { |
| if (!e->dead) { |
| avahi_goodbye_entry(g->server, e, 1, 1); |
| e->dead = 1; |
| } |
| } |
| g->server->need_entry_cleanup = 1; |
| |
| g->n_probing = 0; |
| |
| avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED); |
| |
| schedule_cleanup(g->server); |
| } |
| |
| int avahi_entry_is_commited(AvahiEntry *e) { |
| assert(e); |
| assert(!e->dead); |
| |
| return !e->group || |
| e->group->state == AVAHI_ENTRY_GROUP_REGISTERING || |
| e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED; |
| } |
| |
| AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) { |
| assert(g); |
| assert(!g->dead); |
| |
| return g->state; |
| } |
| |
| void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) { |
| assert(g); |
| |
| g->userdata = userdata; |
| } |
| |
| void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) { |
| assert(g); |
| |
| return g->userdata; |
| } |
| |
| int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) { |
| AvahiEntry *e; |
| assert(g); |
| |
| /* Look for an entry that is not dead */ |
| for (e = g->entries; e; e = e->by_group_next) |
| if (!e->dead) |
| return 0; |
| |
| return 1; |
| } |