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