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