nl80211: Do not for station mode on hostapd deinit

If hostapd was started with the interface already in AP mode, leave the
interface in AP mode on deinit instead of unconditionally forcing it to
station mode.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/drivers/driver_nl80211.c

@@ -298,6 +298,7 @@ struct wpa_driver_nl80211_data {
 	unsigned int ignore_next_local_disconnect:1;
 	unsigned int allow_p2p_device:1;
 	unsigned int hostapd:1;
+	unsigned int start_mode_ap:1;
 
 	u64 remain_on_chan_cookie;
 	u64 send_action_cookie;
@@ -340,7 +341,7 @@ static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
 				       enum nl80211_iftype nlmode);
 static int
 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
-				   const u8 *set_addr);
+				   const u8 *set_addr, int first);
 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 				   const u8 *addr, int cmd, u16 reason_code,
 				   int local_state_change);
@@ -1092,7 +1093,7 @@ static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 	if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 		wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 			   "interface");
-		wpa_driver_nl80211_finish_drv_init(drv, NULL);
+		wpa_driver_nl80211_finish_drv_init(drv, NULL, 0);
 		return 1;
 	}
 
@@ -3755,7 +3756,7 @@ static void * wpa_driver_nl80211_drv_init(void *ctx, const char *ifname,
 		os_free(rcfg);
 	}
 
-	if (wpa_driver_nl80211_finish_drv_init(drv, set_addr))
+	if (wpa_driver_nl80211_finish_drv_init(drv, set_addr, 1))
 		goto failed;
 
 	drv->eapol_tx_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
@@ -4156,7 +4157,7 @@ static int i802_set_iface_flags(struct i802_bss *bss, int up)
 
 static int
 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
-				   const u8 *set_addr)
+				   const u8 *set_addr, int first)
 {
 	struct i802_bss *bss = drv->first_bss;
 	int send_rfkill_event = 0;
@@ -4183,6 +4184,9 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
 				set_addr)))
 		return -1;
 
+	if (first && nl80211_get_ifmode(bss) == NL80211_IFTYPE_AP)
+		drv->start_mode_ap = 1;
+
 	if (drv->hostapd)
 		nlmode = NL80211_IFTYPE_AP;
 	else if (bss->if_dynamic)
@@ -4311,7 +4315,9 @@ static void wpa_driver_nl80211_deinit(struct i802_bss *bss)
 
 	(void) i802_set_iface_flags(bss, 0);
 	if (drv->nlmode != NL80211_IFTYPE_P2P_DEVICE) {
-		wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION);
+		if (!drv->hostapd || !drv->start_mode_ap)
+			wpa_driver_nl80211_set_mode(bss,
+						    NL80211_IFTYPE_STATION);
 		nl80211_mgmt_unsubscribe(bss, "deinit");
 	} else {
 		nl80211_mgmt_unsubscribe(bss, "deinit");