From 48fb9dda9e2ea52a818e595ea98a90d6483c2278 Mon Sep 17 00:00:00 2001
From: Joakim Eriksson <joakime@sics.se>
Date: Sun, 13 Feb 2011 11:25:53 +0100
Subject: [PATCH] fixed of0 to respect min hop rank increase

---
 core/net/rpl/rpl-of0.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/core/net/rpl/rpl-of0.c b/core/net/rpl/rpl-of0.c
index daec2104c..a108acc45 100644
--- a/core/net/rpl/rpl-of0.c
+++ b/core/net/rpl/rpl-of0.c
@@ -69,6 +69,7 @@ reset(rpl_dag_t *dag)
 static rpl_rank_t
 calculate_rank(rpl_parent_t *p, rpl_rank_t base_rank)
 {
+  rpl_rank_t increment;
   if(base_rank == 0) {
     if(p == NULL) {
       return INFINITE_RANK;
@@ -76,12 +77,14 @@ calculate_rank(rpl_parent_t *p, rpl_rank_t base_rank)
     base_rank = p->rank;
   }
 
-  if((rpl_rank_t)(base_rank + DEFAULT_RANK_INCREMENT) < base_rank) {
+  increment = p != NULL ? p->dag->min_hoprankinc : DEFAULT_RANK_INCREMENT;
+
+  if((rpl_rank_t)(base_rank + increment) < base_rank) {
     PRINTF("RPL: OF0 rank %d incremented to infinite rank due to wrapping\n",
         base_rank);
     return INFINITE_RANK;
   }
-  return base_rank + DEFAULT_RANK_INCREMENT;
+  return base_rank + increment;
 
 }