#include "cache.h"
#include "log.h"
-#define AVAHI_MAX_CACHE_ENTRIES 200
+#define AVAHI_MAX_CACHE_ENTRIES 500
static void remove_entry(AvahiCache *c, AvahiCacheEntry *e) {
AvahiCacheEntry *t;
if (e->time_event)
avahi_time_event_free(e->time_event);
- avahi_browser_notify(c->server, c->interface, e->record, AVAHI_BROWSER_REMOVE);
-
+ avahi_multicast_lookup_engine_notify(c->server->multicast_lookup_engine, c->interface, e->record, AVAHI_BROWSER_REMOVE);
+
avahi_record_unref(e->record);
avahi_free(e);
static void elapse_func(AvahiTimeEvent *t, void *userdata) {
AvahiCacheEntry *e = userdata;
/* char *txt; */
+ unsigned percent = 0;
assert(t);
assert(e);
/* txt = avahi_record_to_string(e->record); */
- if (e->state == AVAHI_CACHE_FINAL) {
- remove_entry(e->cache, e);
+ switch (e->state) {
+
+ case AVAHI_CACHE_EXPIRY_FINAL:
+ case AVAHI_CACHE_POOF_FINAL:
+ case AVAHI_CACHE_GOODBYE_FINAL:
+ case AVAHI_CACHE_REPLACE_FINAL:
+
+ remove_entry(e->cache, e);
+
+ e = NULL;
/* avahi_log_debug("Removing entry from cache due to expiration (%s)", txt); */
- } else {
- unsigned percent = 0;
-
- switch (e->state) {
- case AVAHI_CACHE_VALID:
- e->state = AVAHI_CACHE_EXPIRY1;
- percent = 85;
- break;
-
- case AVAHI_CACHE_EXPIRY1:
- e->state = AVAHI_CACHE_EXPIRY2;
- percent = 90;
- break;
- case AVAHI_CACHE_EXPIRY2:
- e->state = AVAHI_CACHE_EXPIRY3;
- percent = 95;
- break;
+ break;
+
+ case AVAHI_CACHE_VALID:
+ case AVAHI_CACHE_POOF:
+ e->state = AVAHI_CACHE_EXPIRY1;
+ percent = 85;
+ break;
- case AVAHI_CACHE_EXPIRY3:
- e->state = AVAHI_CACHE_FINAL;
- percent = 100;
- break;
+ case AVAHI_CACHE_EXPIRY1:
+ e->state = AVAHI_CACHE_EXPIRY2;
+ percent = 90;
+ break;
+ case AVAHI_CACHE_EXPIRY2:
+ e->state = AVAHI_CACHE_EXPIRY3;
+ percent = 95;
+ break;
+
+ case AVAHI_CACHE_EXPIRY3:
+ e->state = AVAHI_CACHE_EXPIRY_FINAL;
+ percent = 100;
+ break;
+ }
- default:
- ;
- }
+ if (e) {
assert(percent > 0);
/* Request a cache update, if we are subscribed to this entry */
- if (avahi_is_subscribed(e->cache->server, e->cache->interface, e->record->key)) {
+ if (avahi_querier_exists(e->cache->interface, e->record->key)) {
/* avahi_log_debug("Requesting cache entry update at %i%% for %s.", percent, txt); */
avahi_interface_post_query(e->cache->interface, e->record->key, 1);
}
-
+
/* Check again later */
next_expiry(e->cache, e, percent);
+
}
/* avahi_free(txt); */
update_time_event(c, e);
}
-static void expire_in_one_second(AvahiCache *c, AvahiCacheEntry *e) {
+static void expire_in_one_second(AvahiCache *c, AvahiCacheEntry *e, AvahiCacheEntryState state) {
assert(c);
assert(e);
- e->state = AVAHI_CACHE_FINAL;
+ e->state = state;
gettimeofday(&e->expiry, NULL);
avahi_timeval_add(&e->expiry, 1000000); /* 1s */
update_time_event(c, e);
AvahiCacheEntry *e;
if ((e = avahi_cache_lookup_record(c, r)))
- expire_in_one_second(c, e);
+ expire_in_one_second(c, e, AVAHI_CACHE_GOODBYE_FINAL);
} else {
AvahiCacheEntry *e = NULL, *first;
t = avahi_timeval_diff(&now, &e->timestamp);
if (t > 1000000)
- expire_in_one_second(c, e);
+ expire_in_one_second(c, e, AVAHI_CACHE_REPLACE_FINAL);
}
}
c->n_entries++;
/* Notify subscribers */
- avahi_browser_notify(c->server, c->interface, e->record, AVAHI_BROWSER_NEW);
+ avahi_multicast_lookup_engine_notify(c->server->multicast_lookup_engine, c->interface, e->record, AVAHI_BROWSER_NEW);
}
e->origin = *a;
while (c->entries)
remove_entry(c, c->entries);
}
+
+/*** Passive observation of failure ***/
+
+static void* start_poof_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, void *userdata) {
+ AvahiAddress *a = userdata;
+
+ assert(c);
+ assert(pattern);
+ assert(e);
+ assert(a);
+
+ switch (e->state) {
+ case AVAHI_CACHE_VALID:
+
+ /* The entry was perfectly valid till, now, so let's enter
+ * POOF mode */
+
+ e->state = AVAHI_CACHE_POOF;
+ e->poof_address = *a;
+
+ break;
+
+ case AVAHI_CACHE_POOF:
+
+ /* This is the second time we got no response, so let's
+ * fucking remove this entry. */
+
+ expire_in_one_second(c, e, AVAHI_CACHE_POOF_FINAL);
+ break;
+
+ default:
+ ;
+ }
+
+ return NULL;
+}
+
+void avahi_cache_start_poof(AvahiCache *c, AvahiKey *key, const AvahiAddress *a) {
+ assert(c);
+ assert(key);
+
+ avahi_cache_walk(c, key, start_poof_callback, a);
+}
+
+void avahi_cache_stop_poof(AvahiCache *c, AvahiRecord *record, const AvahiAddress *a) {
+ AvahiCacheEntry *e;
+
+ assert(c);
+ assert(record);
+ assert(a);
+
+ if (!(e = avahi_cache_lookup_record(c, record)))
+ return;
+
+ /* This function is called for each response suppression
+ record. If the matching cache entry is in POOF state and the
+ query address is the same, we put it back into valid mode */
+
+ if (e->state == AVAHI_CACHE_POOF || e->state == AVAHI_CACHE_POOF_FINAL)
+ if (avahi_address_cmp(a, &e->poof_address) == 0) {
+ e->state = AVAHI_CACHE_VALID;
+ next_expiry(c, e, 80);
+ }
+}
+
+
+