git.meshlink.io Git - catta/blob - subscribe.c

   1 #include "subscribe.h"
   2 #include "util.h"
   3
   4 static void elapse(flxTimeEvent *e, void *userdata) {
   5     flxSubscription *s = userdata;
   6     GTimeVal tv;
   7     gchar *t;
   8
   9     g_assert(s);
  10
  11     flx_server_post_query(s->server, s->interface, s->protocol, s->key);
  12
  13     if (s->n_query++ <= 8)
  14         s->sec_delay *= 2;
  15
  16     g_message("%i. Continuous querying for %s", s->n_query, t = flx_key_to_string(s->key));
  17     g_free(t);
  18
  19
  20     flx_elapse_time(&tv, s->sec_delay*1000, 0);
  21     flx_time_event_queue_update(s->server->time_event_queue, s->time_event, &tv);
  22 }
  23
  24 static void scan_cache_callback(flxInterfaceMonitor *m, flxInterface *i, gpointer userdata) {
  25     flxSubscription *s = userdata;
  26     flxCacheEntry *e;
  27
  28     g_assert(m);
  29     g_assert(i);
  30     g_assert(s);
  31
  32     for (e = flx_cache_lookup_key(i->cache, s->key); e; e = e->by_name_next)
  33         s->callback(s, e->record, i->hardware->index, i->protocol, FLX_SUBSCRIPTION_NEW, s->userdata);
  34 }
  35
  36 flxSubscription *flx_subscription_new(flxServer *server, flxKey *key, gint interface, guchar protocol, flxSubscriptionCallback callback, gpointer userdata) {
  37     flxSubscription *s, *t;
  38     GTimeVal tv;
  39
  40     g_assert(server);
  41     g_assert(key);
  42     g_assert(callback);
  43
  44     s = g_new(flxSubscription, 1);
  45     s->server = server;
  46     s->key = flx_key_ref(key);
  47     s->interface = interface;
  48     s->protocol = protocol;
  49     s->callback = callback;
  50     s->userdata = userdata;
  51     s->n_query = 1;
  52     s->sec_delay = 1;
  53
  54     flx_server_post_query(s->server, s->interface, s->protocol, s->key);
  55
  56     flx_elapse_time(&tv, s->sec_delay*1000, 0);
  57     s->time_event = flx_time_event_queue_add(server->time_event_queue, &tv, elapse, s);
  58
  59     FLX_LLIST_PREPEND(flxSubscription, subscriptions, server->subscriptions, s);
  60
  61     /* Add the new entry to the subscription hash table */
  62     t = g_hash_table_lookup(server->subscription_hashtable, key);
  63     FLX_LLIST_PREPEND(flxSubscription, by_key, t, s);
  64     g_hash_table_replace(server->subscription_hashtable, key, t);
  65
  66     /* Scan the caches */
  67     flx_interface_monitor_walk(s->server->monitor, s->interface, s->protocol, scan_cache_callback, s);
  68
  69     return s;
  70 }
  71
  72 void flx_subscription_free(flxSubscription *s) {
  73     flxSubscription *t;
  74
  75     g_assert(s);
  76
  77     FLX_LLIST_REMOVE(flxSubscription, subscriptions, s->server->subscriptions, s);
  78
  79     t = g_hash_table_lookup(s->server->subscription_hashtable, s->key);
  80     FLX_LLIST_REMOVE(flxSubscription, by_key, t, s);
  81     if (t)
  82         g_hash_table_replace(s->server->subscription_hashtable, t->key, t);
  83     else
  84         g_hash_table_remove(s->server->subscription_hashtable, s->key);
  85
  86     flx_time_event_queue_remove(s->server->time_event_queue, s->time_event);
  87     flx_key_unref(s->key);
  88
  89
  90     g_free(s);
  91 }
  92
  93 void flx_subscription_notify(flxServer *server, flxInterface *i, flxRecord *record, flxSubscriptionEvent event) {
  94     flxSubscription *s;
  95
  96     g_assert(server);
  97     g_assert(record);
  98
  99     for (s = g_hash_table_lookup(server->subscription_hashtable, record->key); s; s = s->by_key_next)
 100         if (flx_interface_match(i, s->interface, s->protocol))
 101             s->callback(s, record, i->hardware->index, i->protocol, event, s->userdata);
 102
 103 }