X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Flib%2Fnet%2Fctp%2FCtpForwardingEngineP.nc;h=eac244e8822948bdb8653586b9a376accdfc6e5b;hb=3a90131d2b16435bd233b5d8bdf36b5644fa8957;hp=38609a4ceef84dbbb7b5b238a0ce44923905b967;hpb=ed5c09b9b7f07d0f531a32852bf3e6bd48588046;p=tinyos-2.x.git

diff --git a/tos/lib/net/ctp/CtpForwardingEngineP.nc b/tos/lib/net/ctp/CtpForwardingEngineP.nc
index 38609a4c..eac244e8 100644
--- a/tos/lib/net/ctp/CtpForwardingEngineP.nc
+++ b/tos/lib/net/ctp/CtpForwardingEngineP.nc
@@ -684,9 +684,11 @@ implementation {
         // Loop-detection code:
         if (call CtpInfo.getEtx(&gradient) == SUCCESS) {
           // We only check for loops if we know our own metric
-          if (call CtpPacket.getEtx(m) < gradient) {
-            // The incoming packet's metric (gradient) is less than our
-            // own gradient.  Trigger a route update and backoff.
+          if (call CtpPacket.getEtx(m) <= gradient) {
+            // If our etx metric is less than or equal to the etx value
+	    // on the packet (etx of the previous hop node), then we believe
+	    // we are in a loop.
+	    // Trigger a route update and backoff.
             call CtpInfo.triggerImmediateRouteUpdate();
             startRetxmitTimer(LOOPY_WINDOW, LOOPY_OFFSET);
             call CollectionDebug.logEventMsg(NET_C_FE_LOOP_DETECTED,