Aro Registation and Dao update

Aro registration stop Active DAO process.

DAO transit build set fully path controller bit's.

Change-Id: Id692dc51611aa3a4c4df6668d0a4bfc11e454f67

source/RPL/rpl_downward.c

@@ -545,8 +545,7 @@ static rpl_dao_target_t *rpl_instance_choose_target_to_assign(rpl_instance_t *in
              */
             ns_list_foreach(rpl_neighbour_t, neighbour, &instance->candidate_neighbours) {
                 if (neighbour->dao_path_control & unassigned_pc) {
-                    unassigned_pc &= neighbour->dao_path_control;
-                    *path_control = unassigned_pc;
+                    *path_control = neighbour->dao_path_control;
                     *parent = neighbour;
                     return target;
                 }
@@ -561,14 +560,7 @@ static rpl_dao_target_t *rpl_instance_choose_target_to_assign(rpl_instance_t *in
             }
         }
 
-        /* If looking for a follow-up target, final path control must match */
-        if (t1) {
-            if (unassigned_pc != *path_control) {
-                continue;
-            }
-        } else {
-            *path_control = unassigned_pc;
-        }
+        *path_control = target->path_control;
         return target;
     }
 
@@ -1811,6 +1803,8 @@ static void rpl_instance_address_registration_cancel(rpl_instance_t *instance)
     instance->wait_response = NULL;
     instance->pending_neighbour_confirmation = false;
     instance->delay_dao_timer = 0;
+    instance->dao_in_transit = false;
+    instance->dao_retry_timer = 0;
 }
 
 void rpl_instance_parent_address_reg_timer_update(rpl_instance_t *instance, uint16_t seconds)