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dbus: Add D-Bus methods to flush the BSS cache

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Add an "Interface.FlushBSS" method to the new D-Bus API and a "flush"
method to the old API. Both take an age parameter that is a threshold
(in seconds) for selecting entries to evict. Setting this parameter
to zero flushes all entries from the cache.

This mechanism is useful for a connection manager to clear state at
startup and on resume (where the age parameter may be used to hold
onto recent/valid data).
This commit is contained in:
Sam Leffler 2011-03-20 12:02:33 +02:00 • committed by Jouni Malinen
parent d4c1ec56f1
commit 2b65b30da8
8 changed files with 97 additions and 6 deletions
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30
wpa_supplicant/bss.c
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@ -421,9 +421,8 @@ void wpa_bss_update_end(struct wpa_supplicant *wpa_s, struct scan_info *info,
}
static void wpa_bss_timeout(void *eloop_ctx, void *timeout_ctx)
void wpa_bss_flush_by_age(struct wpa_supplicant *wpa_s, int age)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_bss *bss, *n;
struct os_time t;
@ -431,7 +430,7 @@ static void wpa_bss_timeout(void *eloop_ctx, void *timeout_ctx)
return;
os_get_time(&t);
t.sec -= WPA_BSS_EXPIRATION_AGE;
t.sec -= age;
dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list) {
if (wpa_bss_in_use(wpa_s, bss))
@ -444,6 +443,14 @@ static void wpa_bss_timeout(void *eloop_ctx, void *timeout_ctx)
} else
break;
}
}
static void wpa_bss_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_bss_flush_by_age(wpa_s, WPA_BSS_EXPIRATION_AGE);
eloop_register_timeout(WPA_BSS_EXPIRATION_PERIOD, 0,
wpa_bss_timeout, wpa_s, NULL);
}
@ -459,14 +466,25 @@ int wpa_bss_init(struct wpa_supplicant *wpa_s)
}
void wpa_bss_deinit(struct wpa_supplicant *wpa_s)
void wpa_bss_flush(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss, *n;
eloop_cancel_timeout(wpa_bss_timeout, wpa_s, NULL);
if (wpa_s->bss.next == NULL)
return; /* BSS table not yet initialized */
dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list)
dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list) {
if (wpa_bss_in_use(wpa_s, bss))
continue;
wpa_bss_remove(wpa_s, bss);
}
}
void wpa_bss_deinit(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(wpa_bss_timeout, wpa_s, NULL);
wpa_bss_flush(wpa_s);
}