WS ARO handler update

Do not accept new childs if temporary not have a any selected parent.

Change-Id: I817dad0144cb614276b3e1847b4057dfa20ca289

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_common.c

@@ -31,6 +31,8 @@
 #include "Service_Libs/etx/etx.h"
 #include "Service_Libs/mac_neighbor_table/mac_neighbor_table.h"
 #include "Service_Libs/blacklist/blacklist.h"
+#include "RPL/rpl_protocol.h"
+#include "RPL/rpl_control.h"
 #include "ws_management_api.h"
 #include "mac_api.h"
 
@@ -404,6 +406,13 @@ bool ws_common_allow_child_registration(protocol_interface_info_entry_t *interfa
         return true;
     }
 
+    //Verify that we have Selected Parent
+    if (interface->bootsrap_mode != ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER && !rpl_control_parent_candidate_list_size(interface, true)) {
+        tr_info("Do not accept new ARO child: no selected parent");
+        return false;
+    }
+
+
     ns_list_foreach_safe(mac_neighbor_table_entry_t, cur, &mac_neighbor_info(interface)->neighbour_list) {
 
         if (ipv6_neighbour_has_registered_by_eui64(&interface->ipv6_neighbour_cache, cur->mac64)) {