DWST_TU
dw_index = (tsf / ieee80211_tu_to_usec(DWST_TU)) & 0xf;
#define DWST_TSF_MASK (ieee80211_tu_to_usec(DWST_TU) - 1)
#define SLOT_TSF_MASK (ieee80211_tu_to_usec(DWST_TU) - 1)
static_assert(16 * DWST_TU * 1024 == 8192 * 1024);
is_sync_beacon = le16_to_cpu(mgmt->u.beacon.beacon_int) == DWST_TU;
mgmt->u.beacon.beacon_int = cpu_to_le16(is_discovery ? 100 : DWST_TU);