From 5a3ac82923305d21abfc0a924a3621fb34d91245 Mon Sep 17 00:00:00 2001
From: gnawali <gnawali>
Date: Fri, 14 Aug 2009 18:09:43 +0000
Subject: [PATCH] fix bug - testing for large enough packetGap to recompute
 estimate is not enough.  Reported by Mehmet Akif Antepli and Scott Moeller

---
 tos/lib/net/4bitle/LinkEstimatorP.nc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tos/lib/net/4bitle/LinkEstimatorP.nc b/tos/lib/net/4bitle/LinkEstimatorP.nc
index 6738a9f8..130d6415 100644
--- a/tos/lib/net/4bitle/LinkEstimatorP.nc
+++ b/tos/lib/net/4bitle/LinkEstimatorP.nc
@@ -376,7 +376,11 @@ implementation {
       NeighborTable[idx].inquality = 0;
     }
 
-    if (packetGap >= BLQ_PKT_WINDOW) {
+    // The or with packetGap >= BLQ_PKT_WINDOW is needed in case
+    // failcnt gets reset above
+
+    if (((NeighborTable[idx].rcvcnt + NeighborTable[idx].failcnt) >= BLQ_PKT_WINDOW)
+	|| (packetGap >= BLQ_PKT_WINDOW)) {
       updateNeighborTableEst(NeighborTable[idx].ll_addr);
     }
 
-- 
2.39.2