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nl80211: Use beacon TSF if it is newer than Probe Response TSF

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cfg80211 sends TSF information with the attribute NL80211_BSS_BEACON_TSF
if the scan results include information from Beacon frame. Probe
Response frame information is included in NL80211_BSS_TSF. If the device
receives only Beacon frames, NL80211_BSS_TSF might not carry updated
TSF, which results an older TSF being used in wpa_supplicant. Fetch both
possible TSF values (if available) and choose the latest TSF for the BSS
entry.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Srinivas Dasari 2015-08-12 15:54:54 +05:30 committed by Jouni Malinen
parent 708ec753bc
commit 75055a538b
1 changed files with 5 additions and 0 deletions
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5
src/drivers/driver_nl80211_scan.c
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@ -586,6 +586,11 @@ int bss_info_handler(struct nl_msg *msg, void *arg)
r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID; r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
if (bss[NL80211_BSS_TSF]) if (bss[NL80211_BSS_TSF])
r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]); r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
if (bss[NL80211_BSS_BEACON_TSF]) {
u64 tsf = nla_get_u64(bss[NL80211_BSS_BEACON_TSF]);
if (tsf > r->tsf)
r->tsf = tsf;
}
if (bss[NL80211_BSS_SEEN_MS_AGO]) if (bss[NL80211_BSS_SEEN_MS_AGO])
r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]); r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
r->ie_len = ie_len; r->ie_len = ie_len;