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wifi: cfg80211: Handle specific BSSID in 6GHz scanning

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When the scan parameters for a 6GHz scan specify a unicast
BSSID address, and the corresponding AP is found in the scan
list, add a corresponding entry in the collocated AP list,
so this AP would be directly probed even if it was not
advertised as a collocated AP.

This is needed for handling a scan request that is intended
for a ML probe flow, where user space can requests a scan
to retrieve information for other links in the AP MLD.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230928172905.54b954bc02ad.I1c072793d3d77a4c8fbbc64b4db5cce1bbb00382@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2023-09-28 17:35:30 +03:00 committed by Johannes Berg
parent c00de1c492
commit 0fca7784b7
1 changed files with 37 additions and 0 deletions
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37
net/wireless/scan.c
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@ -830,10 +830,47 @@ static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev)
list_for_each_entry(intbss, &rdev->bss_list, list) {
struct cfg80211_bss *res = &intbss->pub;
const struct cfg80211_bss_ies *ies;
const struct element *ssid_elem;
struct cfg80211_colocated_ap *entry;
u32 s_ssid_tmp;
int ret;
ies = rcu_access_pointer(res->ies);
count += cfg80211_parse_colocated_ap(ies,
&coloc_ap_list);
/* In case the scan request specified a specific BSSID
* and the BSS is found and operating on 6GHz band then
* add this AP to the collocated APs list.
* This is relevant for ML probe requests when the lower
* band APs have not been discovered.
*/
if (is_broadcast_ether_addr(rdev_req->bssid) ||
!ether_addr_equal(rdev_req->bssid, res->bssid) ||
res->channel->band != NL80211_BAND_6GHZ)
continue;
ret = cfg80211_calc_short_ssid(ies, &ssid_elem,
&s_ssid_tmp);
if (ret)
continue;
entry = kzalloc(sizeof(*entry) + IEEE80211_MAX_SSID_LEN,
GFP_ATOMIC);
if (!entry)
continue;
memcpy(entry->bssid, res->bssid, ETH_ALEN);
entry->short_ssid = s_ssid_tmp;
memcpy(entry->ssid, ssid_elem->data,
ssid_elem->datalen);
entry->ssid_len = ssid_elem->datalen;
entry->short_ssid_valid = true;
entry->center_freq = res->channel->center_freq;
list_add_tail(&entry->list, &coloc_ap_list);
count++;
}
spin_unlock_bh(&rdev->bss_lock);
}