P2P: Fix default p2p_group_idle timeout for P2P client role

Commit 0d30cc240fa36905b034dc9676f9d8da0ac18e56 forced
wpa_s->current_ssid to be cleared in wpa_supplicant_mark_disassoc()
which gets called from wpa_supplicant_event_disassoc(). This breaks the
P2P group idle mechanism for the case where p2p_group_idle is not set
(i.e., is the default 0) since wpas_p2p_group_idle_timeout() ignores the
timeout in that case if the interface is not recognized as a client
interface (which was based on wpa_s->current_ssid being set).

Fix this by making wpas_p2p_is_client() default to client case if
wpa_s->current_ssid is NULL. This is much more likely case since the P2P
GO mode operation would not really clear the pointer without explicit
request to disconnect.

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

wpa_supplicant/p2p_supplicant.c

@@ -4593,8 +4593,15 @@ int wpas_p2p_ext_listen(struct wpa_supplicant *wpa_s, unsigned int period,
 
 static int wpas_p2p_is_client(struct wpa_supplicant *wpa_s)
 {
-	return wpa_s->current_ssid != NULL &&
-		wpa_s->current_ssid->p2p_group &&
+	if (wpa_s->current_ssid == NULL) {
+		/*
+		 * current_ssid can be clearead when P2P client interface gets
+		 * disconnected, so assume this interface was used as P2P
+		 * client.
+		 */
+		return 1;
+	}
+	return wpa_s->current_ssid->p2p_group &&
 		wpa_s->current_ssid->mode == WPAS_MODE_INFRA;
 }