--- /dev/null
+/* $Id$ */
+
+/***
+ 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 <avahi-common/malloc.h>
+
+#include "server.h"
+#include "browse.h"
+#include "socket.h"
+#include "log.h"
+#include "hashmap.h"
+#include "multicast-lookup.h"
+
+struct AvahiMulticastLookup {
+ AvahiMulticastLookupEngine *engine;
+ int dead;
+
+ AvahiKey *key, *cname_key;
+
+ AvahiMulticastLookupCallback callback;
+ void *userdata;
+
+ AvahiIfIndex interface;
+ AvahiProtocol protocol;
+
+ int queriers_added;
+
+ AvahiTimeEvent *all_for_now_event;
+
+ AVAHI_LLIST_FIELDS(AvahiMulticastLookup, lookups);
+ AVAHI_LLIST_FIELDS(AvahiMulticastLookup, by_key);
+};
+
+struct AvahiMulticastLookupEngine {
+ AvahiServer *server;
+
+ /* Lookups */
+ AVAHI_LLIST_HEAD(AvahiMulticastLookup, lookups);
+ AvahiHashmap *lookups_by_key;
+
+ int cleanup_dead;
+};
+
+static void all_for_now_callback(AvahiTimeEvent *e, void* userdata) {
+ AvahiMulticastLookup *l = userdata;
+
+ assert(e);
+ assert(l);
+
+ avahi_time_event_free(l->all_for_now_event);
+ l->all_for_now_event = NULL;
+
+ l->callback(l->engine, l->interface, l->protocol, AVAHI_BROWSER_ALL_FOR_NOW, AVAHI_LOOKUP_CALLBACK_MULTICAST, NULL, l->userdata);
+}
+
+AvahiMulticastLookup *avahi_multicast_lookup_new(
+ AvahiMulticastLookupEngine *e,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ AvahiKey *key,
+ AvahiMulticastLookupCallback callback,
+ void *userdata) {
+
+ AvahiMulticastLookup *l, *t;
+ struct timeval ctime;
+
+ assert(e);
+ assert(AVAHI_IF_VALID(interface));
+ assert(AVAHI_PROTO_VALID(protocol));
+ assert(key);
+ assert(callback);
+
+ l = avahi_new(AvahiMulticastLookup, 1);
+ l->engine = e;
+ l->dead = 0;
+ l->key = avahi_key_ref(key);
+ l->cname_key = avahi_key_new_cname(l->key);
+ l->callback = callback;
+ l->userdata = userdata;
+ l->interface = interface;
+ l->protocol = protocol;
+ l->all_for_now_event = NULL;
+ l->queriers_added = 0;
+
+ t = avahi_hashmap_lookup(e->lookups_by_key, l->key);
+ AVAHI_LLIST_PREPEND(AvahiMulticastLookup, by_key, t, l);
+ avahi_hashmap_replace(e->lookups_by_key, avahi_key_ref(l->key), t);
+
+ AVAHI_LLIST_PREPEND(AvahiMulticastLookup, lookups, e->lookups, l);
+
+ avahi_querier_add_for_all(e->server, interface, protocol, l->key, &ctime);
+
+ /* add a second */
+ avahi_timeval_add(&ctime, 1000000);
+
+ l->all_for_now_event = avahi_time_event_new(e->server->time_event_queue, &ctime, all_for_now_callback, l);
+
+ return l;
+}
+
+static void lookup_stop(AvahiMulticastLookup *l) {
+ assert(l);
+
+ l->callback = NULL;
+
+ if (l->queriers_added) {
+ avahi_querier_remove_for_all(l->engine->server, l->interface, l->protocol, l->key);
+ l->queriers_added = 0;
+ }
+
+ if (l->all_for_now_event) {
+ avahi_time_event_free(l->all_for_now_event);
+ l->all_for_now_event = NULL;
+ }
+}
+
+static void lookup_destroy(AvahiMulticastLookup *l) {
+ AvahiMulticastLookup *t;
+ assert(l);
+
+ lookup_stop(l);
+
+ t = avahi_hashmap_lookup(l->engine->lookups_by_key, l->key);
+ AVAHI_LLIST_REMOVE(AvahiMulticastLookup, by_key, t, l);
+ if (t)
+ avahi_hashmap_replace(l->engine->lookups_by_key, avahi_key_ref(l->key), t);
+ else
+ avahi_hashmap_remove(l->engine->lookups_by_key, l->key);
+
+ AVAHI_LLIST_REMOVE(AvahiMulticastLookup, lookups, l->engine->lookups, l);
+
+ if (l->key)
+ avahi_key_unref(l->key);
+
+ if (l->cname_key)
+ avahi_key_unref(l->cname_key);
+
+ avahi_free(l);
+}
+
+void avahi_multicast_lookup_free(AvahiMulticastLookup *l) {
+ assert(l);
+
+ if (l->dead)
+ return;
+
+ l->dead = 1;
+ l->engine->cleanup_dead = 1;
+ lookup_stop(l);
+}
+
+void avahi_multicast_lookup_engine_cleanup(AvahiMulticastLookupEngine *e) {
+ AvahiMulticastLookup *l, *n;
+ assert(e);
+
+ while (e->cleanup_dead) {
+ e->cleanup_dead = 0;
+
+ for (l = e->lookups; l; l = n) {
+ n = l->lookups_next;
+
+ if (l->dead)
+ lookup_destroy(l);
+ }
+ }
+}
+
+struct cbdata {
+ AvahiMulticastLookupEngine *engine;
+ AvahiMulticastLookupCallback callback;
+ void *userdata;
+ AvahiKey *key, *cname_key;
+ AvahiInterface *interface;
+ unsigned n_found;
+};
+
+static void* scan_cache_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, void* userdata) {
+ struct cbdata *cbdata = userdata;
+
+ assert(c);
+ assert(pattern);
+ assert(e);
+ assert(cbdata);
+
+ cbdata->callback(
+ cbdata->engine,
+ cbdata->interface->hardware->index,
+ cbdata->interface->protocol,
+ AVAHI_BROWSER_NEW,
+ AVAHI_LOOKUP_CALLBACK_CACHED|AVAHI_LOOKUP_CALLBACK_MULTICAST,
+ e->record,
+ cbdata->userdata);
+
+ cbdata->n_found ++;
+
+ return NULL;
+}
+
+static void scan_interface_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
+ struct cbdata *cbdata = userdata;
+
+ assert(m);
+ assert(i);
+ assert(cbdata);
+
+ cbdata->interface = i;
+
+ avahi_cache_walk(i->cache, cbdata->key, scan_cache_callback, cbdata);
+
+ if (cbdata->cname_key)
+ avahi_cache_walk(i->cache, cbdata->cname_key, scan_cache_callback, cbdata);
+
+ cbdata->interface = NULL;
+}
+
+unsigned avahi_multicast_lookup_engine_scan_cache(
+ AvahiMulticastLookupEngine *e,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ AvahiKey *key,
+ AvahiMulticastLookupCallback callback,
+ void *userdata) {
+
+ struct cbdata cbdata;
+
+ assert(e);
+ assert(key);
+ assert(callback);
+
+ assert(AVAHI_IF_VALID(interface));
+ assert(AVAHI_PROTO_VALID(protocol));
+
+ cbdata.engine = e;
+ cbdata.key = key;
+ cbdata.cname_key = avahi_key_new_cname(key);
+ cbdata.callback = callback;
+ cbdata.userdata = userdata;
+ cbdata.interface = NULL;
+ cbdata.n_found = 0;
+
+ avahi_interface_monitor_walk(e->server->monitor, interface, protocol, scan_interface_callback, &cbdata);
+
+ if (cbdata.cname_key)
+ avahi_key_unref(cbdata.cname_key);
+
+ return cbdata.n_found;
+}
+
+void avahi_multicast_lookup_engine_new_interface(AvahiMulticastLookupEngine *e, AvahiInterface *i) {
+ AvahiMulticastLookup *l;
+
+ assert(e);
+ assert(i);
+
+ for (l = e->lookups; l; l = l->lookups_next) {
+
+ if (l->dead || !l->callback)
+ continue;
+
+ if (l->queriers_added && avahi_interface_match(i, l->interface, l->protocol))
+ avahi_querier_add(i, l->key, NULL);
+ }
+}
+
+void avahi_multicast_lookup_engine_notify(AvahiMulticastLookupEngine *e, AvahiInterface *i, AvahiRecord *record, AvahiBrowserEvent event) {
+ AvahiMulticastLookup *l;
+
+ assert(e);
+ assert(record);
+ assert(i);
+
+ for (l = avahi_hashmap_lookup(e->lookups_by_key, record->key); l; l = l->by_key_next) {
+ if (l->dead || !l->callback)
+ continue;
+
+ if (avahi_interface_match(i, l->interface, l->protocol))
+ l->callback(e, i->hardware->index, i->protocol, event, AVAHI_LOOKUP_CALLBACK_MULTICAST, record, l->userdata);
+ }
+
+
+ if (record->key->clazz == AVAHI_DNS_CLASS_IN && record->key->type == AVAHI_DNS_TYPE_CNAME) {
+ /* It's a CNAME record, so we have to scan the all lookups to see if one matches */
+
+ for (l = e->lookups; l; l = l->lookups_next) {
+ AvahiKey *key;
+
+ if (l->dead || !l->callback)
+ continue;
+
+ if ((key = avahi_key_new_cname(l->key))) {
+ if (avahi_key_equal(record->key, key))
+ l->callback(e, i->hardware->index, i->protocol, event, AVAHI_LOOKUP_CALLBACK_MULTICAST, record, l->userdata);
+
+ avahi_key_unref(key);
+ }
+ }
+ }
+}
+
+AvahiMulticastLookupEngine *avahi_multicast_lookup_engine_new(AvahiServer *s) {
+ AvahiMulticastLookupEngine *e;
+
+ assert(s);
+
+ e = avahi_new(AvahiMulticastLookupEngine, 1);
+ e->server = s;
+ e->cleanup_dead = 0;
+
+ /* Initialize lookup list */
+ e->lookups_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, (AvahiFreeFunc) avahi_key_unref, NULL);
+ AVAHI_LLIST_HEAD_INIT(AvahiWideAreaLookup, e->lookups);
+
+ return e;
+}
+
+void avahi_multicast_lookup_engine_free(AvahiMulticastLookupEngine *e) {
+ assert(e);
+
+ while (e->lookups)
+ lookup_destroy(e->lookups);
+
+ avahi_hashmap_free(e->lookups_by_key);
+ avahi_free(e);
+}
+
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