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device: change scan command logic

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This patch allows alternating between the passive and active
scans taking into consideration an existence of the known
hidden networks and previous observation of them in the scan
results, as well as an ability to randomize the MAC address.
This commit is contained in:
Tim Kourt 2018-06-27 16:33:05 -07:00 committed by Denis Kenzior
parent 5828073cd5
commit 27e305c9d2
1 changed files with 21 additions and 12 deletions
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33
src/device.c
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@ -1759,7 +1759,6 @@ static struct l_dbus_message *device_scan(struct l_dbus *dbus,
void *user_data)
{
struct device *device = user_data;
uint32_t id;
l_debug("Scan called from DBus");
@ -1773,19 +1772,29 @@ static struct l_dbus_message *device_scan(struct l_dbus *dbus,
device->scan_pending = l_dbus_message_ref(message);
/*
* If device is not connected to a BSS use a passive scan to
* avoid advertising our address until we support address
* randomization (on the devices that support it).
* If we're not connected and no hidden networks are seen & configured,
* use passive scanning to hide our MAC address
*/
if (!device->connected_bss)
id = scan_passive(device->index, device_scan_triggered,
new_scan_results, device, NULL);
else
id = scan_active(device->index, NULL, 0, device_scan_triggered,
new_scan_results, device, NULL);
if (!device->connected_bss &&
!(device->seen_hidden_networks &&
network_info_has_hidden())) {
if (!scan_passive(device->index, device_scan_triggered,
new_scan_results, device, NULL))
return dbus_error_failed(message);
} else {
struct scan_parameters params;
if (!id)
return dbus_error_failed(message);
memset(&params, 0, sizeof(params));
/* If we're connected, HW cannot randomize our MAC */
if (!device->connected_bss)
params.randomize_mac_addr_hint = true;
if (!scan_active_full(device->index, &params,
device_scan_triggered,
new_scan_results, device, NULL))
return dbus_error_failed(message);
}
return NULL;
}