From 9a74ada90c02a13787b413313fa76812a9b5ce68 Mon Sep 17 00:00:00 2001
From: Adam Dunkels <adam@thingsquare.com>
Date: Sun, 11 Aug 2013 23:50:37 +0200
Subject: [PATCH] Added a function rpl_get_parent_link_metric() for obtaining
 the link metric of a given parent

---
 core/net/rpl/rpl-dag.c | 11 +++++++++++
 core/net/rpl/rpl.h     |  3 ++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/core/net/rpl/rpl-dag.c b/core/net/rpl/rpl-dag.c
index 379461a0b..826c7152b 100644
--- a/core/net/rpl/rpl-dag.c
+++ b/core/net/rpl/rpl-dag.c
@@ -95,6 +95,17 @@ rpl_get_parent_rank(uip_lladdr_t *addr)
   }
 }
 /*---------------------------------------------------------------------------*/
+uint16_t
+rpl_get_parent_link_metric(uip_lladdr_t *addr)
+{
+  rpl_parent_t *p = nbr_table_get_from_lladdr(rpl_parents, (rimeaddr_t *)addr);
+  if(p != NULL) {
+    return p->link_metric;
+  } else {
+    return 0;
+  }
+}
+/*---------------------------------------------------------------------------*/
 uip_ipaddr_t *
 rpl_get_parent_ipaddr(rpl_parent_t *p)
 {
diff --git a/core/net/rpl/rpl.h b/core/net/rpl/rpl.h
index 6109874ef..689e2063b 100644
--- a/core/net/rpl/rpl.h
+++ b/core/net/rpl/rpl.h
@@ -244,6 +244,7 @@ void rpl_remove_header(void);
 uint8_t rpl_invert_header(void);
 uip_ipaddr_t *rpl_get_parent_ipaddr(rpl_parent_t *nbr);
 rpl_rank_t rpl_get_parent_rank(uip_lladdr_t *addr);
-void rpl_dag_init();
+uint16_t rpl_get_parent_link_metric(uip_lladdr_t *addr);
+void rpl_dag_init(void);
 /*---------------------------------------------------------------------------*/
 #endif /* RPL_H */