P2P: Add deinit_p2p_cli op to clear P2P client driver state

On P2P group removal, the GO is deinitialized correctly (and the vif
mode is set back to sta in case of nl80211), but the P2P client mode
wasn't deinitialized, and the nl80211 vif stays in P2P client mode.

Add a new deinit_p2p_cli op (similar to deinit_ap), which currently only
sets the interface back to station mode.

Signed-hostap: Eliad Peller <eliad@wizery.com>
intended-for: hostap-1

src/drivers/driver.h

@@ -2018,6 +2018,16 @@ struct wpa_driver_ops {
 	 */
 	int (*deinit_ap)(void *priv);
 
+	/**
+	 * deinit_p2p_cli - Deinitialize P2P client mode
+	 * @priv: Private driver interface data
+	 * Returns: 0 on success, -1 on failure (or if not supported)
+	 *
+	 * This optional function can be used to disable P2P client mode. It
+	 * can be used to change the interface type back to station mode.
+	 */
+	int (*deinit_p2p_cli)(void *priv);
+
 	/**
 	 * suspend - Notification on system suspend/hibernate event
 	 * @priv: Private driver interface data

src/drivers/driver_nl80211.c

@@ -8303,6 +8303,16 @@ static int wpa_driver_nl80211_deinit_ap(void *priv)
 }
 
 
+static int wpa_driver_nl80211_deinit_p2p_cli(void *priv)
+{
+	struct i802_bss *bss = priv;
+	struct wpa_driver_nl80211_data *drv = bss->drv;
+	if (drv->nlmode != NL80211_IFTYPE_P2P_CLIENT)
+		return -1;
+	return wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_STATION);
+}
+
+
 static void wpa_driver_nl80211_resume(void *priv)
 {
 	struct i802_bss *bss = priv;
@@ -9028,6 +9038,7 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
 	wpa_driver_nl80211_cancel_remain_on_channel,
 	.probe_req_report = wpa_driver_nl80211_probe_req_report,
 	.deinit_ap = wpa_driver_nl80211_deinit_ap,
+	.deinit_p2p_cli = wpa_driver_nl80211_deinit_p2p_cli,
 	.resume = wpa_driver_nl80211_resume,
 	.send_ft_action = nl80211_send_ft_action,
 	.signal_monitor = nl80211_signal_monitor,

wpa_supplicant/driver_i.h

@@ -427,6 +427,13 @@ static inline int wpa_drv_deinit_ap(struct wpa_supplicant *wpa_s)
 	return 0;
 }
 
+static inline int wpa_drv_deinit_p2p_cli(struct wpa_supplicant *wpa_s)
+{
+	if (wpa_s->driver->deinit_p2p_cli)
+		return wpa_s->driver->deinit_p2p_cli(wpa_s->drv_priv);
+	return 0;
+}
+
 static inline void wpa_drv_suspend(struct wpa_supplicant *wpa_s)
 {
 	if (wpa_s->driver->suspend)

wpa_supplicant/p2p_supplicant.c

@@ -311,7 +311,10 @@ static void wpas_p2p_group_delete(struct wpa_supplicant *wpa_s)
 		wpa_printf(MSG_DEBUG, "P2P: Temporary group network not "
 			   "found");
 	}
-	wpa_supplicant_ap_deinit(wpa_s);
+	if (wpa_s->ap_iface)
+		wpa_supplicant_ap_deinit(wpa_s);
+	else
+		wpa_drv_deinit_p2p_cli(wpa_s);
 }