nl80211: Ignore deauth/disassoc event during Connect reassociation

cfg80211 reports a deauth/disassoc event when internally clearing
connection with the previous BSS. Ignore that event to allow the new
connect command to complete.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/drivers/driver_nl80211.c

@@ -4841,12 +4841,14 @@ static int nl80211_connect_common(struct wpa_driver_nl80211_data *drv,
 			return -1;
 	}
 
+	drv->connect_reassoc = 0;
 	if (params->prev_bssid) {
 		wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
 			   MAC2STR(params->prev_bssid));
 		if (nla_put(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
 			    params->prev_bssid))
 			return -1;
+		drv->connect_reassoc = 1;
 	}
 
 	return 0;

src/drivers/driver_nl80211.h

@@ -151,6 +151,7 @@ struct wpa_driver_nl80211_data {
 	unsigned int get_pref_freq_list:1;
 	unsigned int set_prob_oper_freq:1;
 	unsigned int scan_vendor_cmd_avail:1;
+	unsigned int connect_reassoc:1;
 
 	u64 vendor_scan_cookie;
 	u64 remain_on_chan_cookie;

src/drivers/driver_nl80211_event.c

@@ -285,6 +285,8 @@ static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 		return;
 	}
 
+	drv->connect_reassoc = 0;
+
 	status_code = status ? nla_get_u16(status) : WLAN_STATUS_SUCCESS;
 
 	if (cmd == NL80211_CMD_CONNECT) {
@@ -670,6 +672,24 @@ static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 			return;
 		}
 
+		if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME) &&
+		    drv->connect_reassoc && drv->associated &&
+		    os_memcmp(bssid, drv->prev_bssid, ETH_ALEN) == 0 &&
+		    os_memcmp(bssid, drv->auth_attempt_bssid, ETH_ALEN) != 0) {
+			/*
+			 * Avoid issues with some roaming cases where
+			 * disconnection event for the old AP may show up after
+			 * we have started connection with the new AP.
+			 */
+			 wpa_printf(MSG_DEBUG,
+				    "nl80211: Ignore deauth/disassoc event from old AP "
+				    MACSTR
+				    " when already connecting with " MACSTR,
+				    MAC2STR(bssid),
+				    MAC2STR(drv->auth_attempt_bssid));
+			return;
+		}
+
 		if (drv->associated != 0 &&
 		    os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 		    os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {