From ccd3c582807972d69ab3f66a1ea37bb06b72cb60 Mon Sep 17 00:00:00 2001
From: Laurent Deru <laurent.deru@cetic.be>
Date: Sat, 11 Jan 2014 09:00:20 +0100
Subject: [PATCH] rpl_select_parent: Update dag rank according to new parent

---
 core/net/rpl/rpl-dag.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/net/rpl/rpl-dag.c b/core/net/rpl/rpl-dag.c
index 53ba956fa..07364e656 100644
--- a/core/net/rpl/rpl-dag.c
+++ b/core/net/rpl/rpl-dag.c
@@ -741,6 +741,9 @@ rpl_select_parent(rpl_dag_t *dag)
 
   if(best != NULL) {
     rpl_set_preferred_parent(dag, best);
+    dag->rank = dag->instance->of->calculate_rank(dag->preferred_parent, 0);
+  } else {
+    dag->rank = INFINITE_RANK;
   }
 
   return best;