diff options
Diffstat (limited to 'avahi-core/resolve.c')
-rw-r--r-- | avahi-core/resolve.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/avahi-core/resolve.c b/avahi-core/resolve.c new file mode 100644 index 0000000..7d0f068 --- /dev/null +++ b/avahi-core/resolve.c @@ -0,0 +1,158 @@ +/* $Id$ */ + +/*** + 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 "resolve.h" +#include "util.h" + +static void elapse(AvahiTimeEvent *e, void *userdata) { + AvahiRecordResolver *s = userdata; + GTimeVal tv; +/* gchar *t; */ + + g_assert(s); + + avahi_server_post_query(s->server, s->interface, s->protocol, s->key); + + if (s->n_query++ <= 8) + s->sec_delay *= 2; + +/* g_message("%i. Continuous querying for %s", s->n_query, t = avahi_key_to_string(s->key)); */ +/* g_free(t); */ + + avahi_elapse_time(&tv, s->sec_delay*1000, 0); + avahi_time_event_queue_update(s->server->time_event_queue, s->time_event, &tv); +} + +struct cbdata { + AvahiRecordResolver *record_resolver; + AvahiInterface *interface; +}; + +static gpointer scan_cache_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, gpointer userdata) { + struct cbdata *cbdata = userdata; + + g_assert(c); + g_assert(pattern); + g_assert(e); + g_assert(cbdata); + + cbdata->record_resolver->callback( + cbdata->record_resolver, + cbdata->interface->hardware->index, + cbdata->interface->protocol, + AVAHI_BROWSER_NEW, + e->record, + cbdata->record_resolver->userdata); + + return NULL; +} + +static void scan_interface_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, gpointer userdata) { + AvahiRecordResolver *s = userdata; + struct cbdata cbdata = { s, i }; + + g_assert(m); + g_assert(i); + g_assert(s); + + avahi_cache_walk(i->cache, s->key, scan_cache_callback, &cbdata); +} + +AvahiRecordResolver *avahi_record_resolver_new(AvahiServer *server, gint interface, guchar protocol, AvahiKey *key, AvahiRecordResolverCallback callback, gpointer userdata) { + AvahiRecordResolver *s, *t; + GTimeVal tv; + + g_assert(server); + g_assert(key); + g_assert(callback); + + g_assert(!avahi_key_is_pattern(key)); + + s = g_new(AvahiRecordResolver, 1); + s->server = server; + s->key = avahi_key_ref(key); + s->interface = interface; + s->protocol = protocol; + s->callback = callback; + s->userdata = userdata; + s->n_query = 1; + s->sec_delay = 1; + + avahi_server_post_query(s->server, s->interface, s->protocol, s->key); + + avahi_elapse_time(&tv, s->sec_delay*1000, 0); + s->time_event = avahi_time_event_queue_add(server->time_event_queue, &tv, elapse, s); + + AVAHI_LLIST_PREPEND(AvahiRecordResolver, resolver, server->record_resolvers, s); + + /* Add the new entry to the record_resolver hash table */ + t = g_hash_table_lookup(server->record_resolver_hashtable, key); + AVAHI_LLIST_PREPEND(AvahiRecordResolver, by_key, t, s); + g_hash_table_replace(server->record_resolver_hashtable, key, t); + + /* Scan the caches */ + avahi_interface_monitor_walk(s->server->monitor, s->interface, s->protocol, scan_interface_callback, s); + + return s; +} + +void avahi_record_resolver_free(AvahiRecordResolver *s) { + AvahiRecordResolver *t; + + g_assert(s); + + AVAHI_LLIST_REMOVE(AvahiRecordResolver, resolver, s->server->record_resolvers, s); + + t = g_hash_table_lookup(s->server->record_resolver_hashtable, s->key); + AVAHI_LLIST_REMOVE(AvahiRecordResolver, by_key, t, s); + if (t) + g_hash_table_replace(s->server->record_resolver_hashtable, t->key, t); + else + g_hash_table_remove(s->server->record_resolver_hashtable, s->key); + + avahi_time_event_queue_remove(s->server->time_event_queue, s->time_event); + avahi_key_unref(s->key); + + + g_free(s); +} + +void avahi_resolver_notify(AvahiServer *server, AvahiInterface *i, AvahiRecord *record, AvahiBrowserEvent event) { + AvahiRecordResolver *s; + + g_assert(server); + g_assert(record); + + for (s = g_hash_table_lookup(server->record_resolver_hashtable, record->key); s; s = s->by_key_next) + if (avahi_interface_match(i, s->interface, s->protocol)) + s->callback(s, i->hardware->index, i->protocol, event, record, s->userdata); +} + +gboolean avahi_is_subscribed(AvahiServer *server, AvahiKey *k) { + g_assert(server); + g_assert(k); + + return !!g_hash_table_lookup(server->record_resolver_hashtable, k); +} |