From 9390e390de5df6a16c6d862ecad74e6c788cecde Mon Sep 17 00:00:00 2001
From: gnawali <gnawali>
Date: Fri, 21 Dec 2007 04:36:42 +0000
Subject: [PATCH] alpha=9; bug fix for getlinkquality - return infinity if not
 a mature link

---
 tos/lib/net/4bitle/LinkEstimatorP.nc | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tos/lib/net/4bitle/LinkEstimatorP.nc b/tos/lib/net/4bitle/LinkEstimatorP.nc
index b35e1f4c..c428df1b 100644
--- a/tos/lib/net/4bitle/LinkEstimatorP.nc
+++ b/tos/lib/net/4bitle/LinkEstimatorP.nc
@@ -70,7 +70,7 @@ implementation {
     INFINITY = 0xff,
     // decay the link estimate using this alpha
     // we use a denominator of 10, so this corresponds to 0.2
-    ALPHA = 2,
+    ALPHA = 9,
     // number of packets to wait before computing a new
     // DLQ (Data-driven Link Quality)
     DLQ_PKT_WINDOW = 5,
@@ -443,8 +443,12 @@ implementation {
     if (idx == INVALID_RVAL) {
       return INFINITY;
     } else {
-      return NeighborTable[idx].eetx;
-    };
+      if (NeighborTable[idx].flags & MATURE_ENTRY) {
+	return NeighborTable[idx].eetx;
+      } else {
+	return INFINITY;
+      }
+    }
   }
 
   // insert the neighbor at any cost (if there is a room for it)
-- 
2.39.2