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station: separate FT-over-DS stages

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FT-over-DS was refactored to separate the FT action frame and
reassociation. From stations standpoint IWD needs to call
netdev_fast_transition_over_ds_action prior to actually roaming.
For now these two stages are being combined and the action
roam happens immediately after the action response callback.
This commit is contained in:
James Prestwood 2021-04-30 10:47:03 -07:00 committed by Denis Kenzior
parent c10b8d42e3
commit 1b5a58233c
1 changed files with 66 additions and 15 deletions
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81
src/station.c
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@ -1582,6 +1582,21 @@ static void station_roamed(struct station *station)
station_enter_state(station, STATION_STATE_CONNECTED);
}
static void station_roam_retry(struct station *station)
{
/*
* If we're still connected to the old BSS, only clear preparing_roam
* and reattempt in 60 seconds if signal level is still low at that
* time.
*/
station->preparing_roam = false;
station->roam_scan_full = false;
station->ap_directed_roaming = false;
if (station->signal_low)
station_roam_timeout_rearm(station, roam_retry_interval);
}
static void station_roam_failed(struct station *station)
{
l_debug("%u", netdev_get_ifindex(station->netdev));
@ -1620,17 +1635,7 @@ static void station_roam_failed(struct station *station)
}
delayed_retry:
/*
* If we're still connected to the old BSS, only clear preparing_roam
* and reattempt in 60 seconds if signal level is still low at that
* time.
*/
station->preparing_roam = false;
station->roam_scan_full = false;
station->ap_directed_roaming = false;
if (station->signal_low)
station_roam_timeout_rearm(station, roam_retry_interval);
station_roam_retry(station);
}
static void station_netconfig_event_handler(enum netconfig_event event,
@ -1713,6 +1718,45 @@ static bool bss_match_bssid(const void *a, const void *b)
return !memcmp(bss->addr, bssid, sizeof(bss->addr));
}
static void station_fast_transition_ds_cb(struct netdev *netdev,
uint16_t status, const uint8_t *bssid,
void *user_data)
{
struct station *station = user_data;
struct scan_bss *bss;
if (status != 0)
goto failed;
/*
* TODO: In the future it may be desired to start sending out these
* FT-over-DS action frames at the time of connecting then be able to
* roam immediately when required. If this is being done we can simply
* bail out now as ft already caches the entires. But since this was
* initiated due to a need to roam, do so now.
*/
/* Make sure we still have our BSS */
bss = l_queue_find(station->bss_list, bss_match_bssid, bssid);
if (!bss)
goto failed;
l_debug("Starting FT-over-DS roam");
if (netdev_fast_transition_over_ds(station->netdev, bss,
station_fast_transition_cb) < 0)
goto failed;
station->connected_bss = bss;
station->preparing_roam = false;
station_enter_state(station, STATION_STATE_ROAMING);
return;
failed:
station_roam_retry(station);
}
static void station_preauthenticate_cb(struct netdev *netdev,
enum netdev_result result,
const uint8_t *pmk, void *user_data)
@ -1810,11 +1854,18 @@ static void station_transition_start(struct station *station,
/* FT-over-DS can be better suited for these situations */
if ((hs->mde[4] & 1) && (station->ap_directed_roaming ||
station->signal_low)) {
if (netdev_fast_transition_over_ds(station->netdev, bss,
station_fast_transition_cb) < 0) {
station_roam_failed(station);
return;
if (netdev_fast_transition_over_ds_action(
station->netdev, bss,
station_fast_transition_ds_cb,
station) < 0) {
station_roam_retry(station);
}
/*
* Set connected_bss/preparing_roam/state only on a
* successful FT-over-DS action frame response
*/
return;
} else {
if (netdev_fast_transition(station->netdev, bss,
station_fast_transition_cb) < 0) {