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wifi: fix removal of APs from the scan list when it doesn't change

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Due to an omission in the port to the new supplicant D-Bus API
during the 0.9 cycle, if the scan list didn't change, APs may
not have been removed properly from the scan list.
This commit is contained in:
Dan Williams 2012-02-16 12:12:47 -06:00
parent 4f166d719b
commit 836f7d177e
1 changed files with 40 additions and 38 deletions
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78
src/nm-device-wifi.c
View file

@ -141,6 +141,7 @@ struct _NMDeviceWifiPrivate {
glong scheduled_scan_time;
guint8 scan_interval; /* seconds */
guint pending_scan_id;
guint scanlist_cull_id;
Supplicant supplicant;
WifiData * wifi_data;
@ -180,7 +181,7 @@ static void supplicant_iface_notify_scanning_cb (NMSupplicantInterface * iface,
GParamSpec * pspec,
NMDeviceWifi * self);
static void cull_scan_list (NMDeviceWifi *self);
static void schedule_scanlist_cull (NMDeviceWifi *self);
/*****************************************************************/
@ -418,6 +419,11 @@ supplicant_interface_release (NMDeviceWifi *self)
}
memset (priv->supplicant.sig_ids, 0, sizeof (priv->supplicant.sig_ids));
if (priv->scanlist_cull_id) {
g_source_remove (priv->scanlist_cull_id);
priv->scanlist_cull_id = 0;
}
if (priv->supplicant.iface) {
/* Tell the supplicant to disconnect from the current AP */
nm_supplicant_interface_disconnect (priv->supplicant.iface);
@ -1555,15 +1561,10 @@ supplicant_iface_scan_done_cb (NMSupplicantInterface *iface,
if (check_scanning_allowed (self))
schedule_scan (self, TRUE);
#if 0
if (num_results == 0) {
/* ensure that old APs get culled, which otherwise only
* happens when there are actual scan results to process.
*/
cull_scan_list (self);
ap_list_dump (self);
}
#endif
/* Ensure that old APs get removed, which otherwise only
* happens when there are new BSSes.
*/
schedule_scanlist_cull (self);
}
@ -1670,25 +1671,16 @@ merge_scanned_ap (NMDeviceWifi *self,
}
}
static void
static gboolean
cull_scan_list (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv;
GTimeVal cur_time;
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
GTimeVal now;
GSList *outdated_list = NULL;
GSList *elt;
NMActRequest *req;
const char *cur_ap_path = NULL;
guint32 removed = 0, total = 0;
g_return_if_fail (self != NULL);
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
g_get_current_time (&cur_time);
req = nm_device_get_act_request (NM_DEVICE (self));
if (req)
cur_ap_path = nm_active_connection_get_specific_object (NM_ACTIVE_CONNECTION (req));
priv->scanlist_cull_id = 0;
nm_log_dbg (LOGD_WIFI_SCAN, "(%s): checking scan list for outdated APs",
nm_device_get_iface (NM_DEVICE (self)));
@ -1696,19 +1688,16 @@ cull_scan_list (NMDeviceWifi *self)
/* Walk the access point list and remove any access points older than
* three times the inactive scan interval.
*/
g_get_current_time (&now);
for (elt = priv->ap_list; elt; elt = g_slist_next (elt), total++) {
NMAccessPoint * ap = NM_AP (elt->data);
const glong ap_time = nm_ap_get_last_seen (ap);
gboolean keep = FALSE;
const guint prune_interval_s = SCAN_INTERVAL_MAX * 3;
NMAccessPoint *ap = elt->data;
const guint prune_interval_s = SCAN_INTERVAL_MAX * 3;
/* Don't ever prune the AP we're currently associated with */
if (cur_ap_path && !strcmp (cur_ap_path, nm_ap_get_dbus_path (ap)))
keep = TRUE;
if (nm_ap_get_fake (ap))
keep = TRUE;
/* Don't cull the associated AP or manually created APs */
if (ap == priv->current_ap || nm_ap_get_fake (ap))
continue;
if (!keep && (ap_time + prune_interval_s < cur_time.tv_sec))
if (nm_ap_get_last_seen (ap) + prune_interval_s < now.tv_sec)
outdated_list = g_slist_append (outdated_list, ap);
}
@ -1739,6 +1728,21 @@ cull_scan_list (NMDeviceWifi *self)
nm_log_dbg (LOGD_WIFI_SCAN, "(%s): removed %d APs (of %d)",
nm_device_get_iface (NM_DEVICE (self)),
removed, total);
ap_list_dump (self);
return FALSE;
}
static void
schedule_scanlist_cull (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
/* Cull the scan list after the last request for it has come in */
if (priv->scanlist_cull_id)
g_source_remove (priv->scanlist_cull_id);
priv->scanlist_cull_id = g_timeout_add_seconds (4, (GSourceFunc) cull_scan_list, self);
}
static void
@ -1765,15 +1769,13 @@ supplicant_iface_new_bss_cb (NMSupplicantInterface *iface,
/* Add the AP to the device's AP list */
merge_scanned_ap (self, ap);
g_object_unref (ap);
/* Remove outdated access points */
cull_scan_list (self);
ap_list_dump (self);
} else {
nm_log_warn (LOGD_WIFI_SCAN, "(%s): invalid AP properties received",
nm_device_get_iface (NM_DEVICE (self)));
}
/* Remove outdated access points */
schedule_scanlist_cull (self);
}