mac80211: Support a scan request for a specific BSSID

If the cfg80211 scan trigger operation specifies a single BSSID, use
that value instead of the wildcard BSSID in the Probe Request frames.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/scan.c

@@ -305,6 +305,7 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_local *local)
 	ether_addr_copy(local->hw_scan_req->req.mac_addr, req->mac_addr);
 	ether_addr_copy(local->hw_scan_req->req.mac_addr_mask,
 			req->mac_addr_mask);
+	ether_addr_copy(local->hw_scan_req->req.bssid, req->bssid);
 
 	return true;
 }
@@ -499,7 +500,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
 
 	for (i = 0; i < scan_req->n_ssids; i++)
 		ieee80211_send_probe_req(
-			sdata, local->scan_addr, NULL,
+			sdata, local->scan_addr, scan_req->bssid,
 			scan_req->ssids[i].ssid, scan_req->ssids[i].ssid_len,
 			scan_req->ie, scan_req->ie_len,
 			scan_req->rates[band], false,
@@ -564,6 +565,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
 			req->n_channels * sizeof(req->channels[0]);
 		local->hw_scan_req->req.ie = ies;
 		local->hw_scan_req->req.flags = req->flags;
+		eth_broadcast_addr(local->hw_scan_req->req.bssid);
 
 		local->hw_scan_band = 0;