-/* $Id$ */
-
/***
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
unsigned post_id;
int post_id_valid;
-
+
AVAHI_LLIST_FIELDS(AvahiQuerier, queriers);
};
avahi_key_unref(q->key);
avahi_time_event_free(q->time_event);
-
+
avahi_free(q);
}
static void querier_elapse_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void *userdata) {
AvahiQuerier *q = userdata;
struct timeval tv;
-
+
assert(q);
if (q->n_used <= 0) {
/* The queue accepted our query. We store the query id here,
* that allows us to drop the query at a later point if the
* query is very short-lived. */
-
+
q->post_id_valid = 1;
}
q->sec_delay *= 2;
-
+
if (q->sec_delay >= 60*60) /* 1h */
q->sec_delay = 60*60;
-
+
avahi_elapse_time(&tv, q->sec_delay*1000, 0);
avahi_time_event_update(q->time_event, &tv);
}
void avahi_querier_add(AvahiInterface *i, AvahiKey *key, struct timeval *ret_ctime) {
AvahiQuerier *q;
struct timeval tv;
-
+
assert(i);
assert(key);
-
+
if ((q = avahi_hashmap_lookup(i->queriers_by_key, key))) {
-
+
/* Someone is already browsing for records of this RR key */
q->n_used++;
/* No one is browsing for this RR key, so we add a new querier */
if (!(q = avahi_new(AvahiQuerier, 1)))
return; /* OOM */
-
+
q->key = avahi_key_ref(key);
q->interface = i;
q->n_used = 1;
void avahi_querier_remove(AvahiInterface *i, AvahiKey *key) {
AvahiQuerier *q;
- if (!(q = avahi_hashmap_lookup(i->queriers_by_key, key)) || q->n_used <= 0) {
- /* There was no querier for this RR key, or it wasn't referenced by anyone */
- avahi_log_warn(__FILE__": querier_remove() called but no querier to remove.");
+ /* There was no querier for this RR key, or it wasn't referenced
+ * by anyone. */
+ if (!(q = avahi_hashmap_lookup(i->queriers_by_key, key)) || q->n_used <= 0)
return;
- }
if ((--q->n_used) <= 0) {
void avahi_querier_remove_for_all(AvahiServer *s, AvahiIfIndex idx, AvahiProtocol protocol, AvahiKey *key) {
assert(s);
assert(key);
-
+
avahi_interface_monitor_walk(s->monitor, idx, protocol, remove_querier_callback, key);
}
static void add_querier_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
struct cbdata *cbdata = userdata;
-
+
assert(m);
assert(i);
assert(cbdata);
void avahi_querier_add_for_all(AvahiServer *s, AvahiIfIndex idx, AvahiProtocol protocol, AvahiKey *key, struct timeval *ret_ctime) {
struct cbdata cbdata;
-
+
assert(s);
assert(key);
if (ret_ctime)
ret_ctime->tv_sec = ret_ctime->tv_usec = 0;
-
+
avahi_interface_monitor_walk(s->monitor, idx, protocol, add_querier_callback, &cbdata);
}
int avahi_querier_shall_refresh_cache(AvahiInterface *i, AvahiKey *key) {
AvahiQuerier *q;
-
+
assert(i);
assert(key);
/* This key is currently not subscribed at all, so no cache
* refresh is needed */
return 0;
-
+
if (q->n_used <= 0) {
/* If this is an entry nobody references right now, don't
* consider it "existing". */
-
+
/* Remove this querier since it is referenced by nobody
* and the cached data will soon be out of date */
avahi_querier_free(q);
/* Tell the cache that no refresh is needed */
return 0;
-
+
} else {
struct timeval tv;
void avahi_querier_free_all(AvahiInterface *i) {
assert(i);
- while (i->queriers)
+ while (i->queriers)
avahi_querier_free(i->queriers);
}