fix divide by zero

m-lab · Nov 19, 2021 · a06b4d0 · a06b4d0
1 parent fe4b616
commit a06b4d0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tcp/tcp.go b/tcp/tcp.go
@@ -296,7 +296,7 @@ func (jt *JitterTracker) Add(tsval uint32, pktTime time.Time) {
 	if !jt.initialized {
 		jt.firstTSVal = tsval
 		jt.firstPktTime = pktTime
-		if !jt.lastPktTime.IsZero() {
+		if !jt.lastPktTime.IsZero() && (jt.lastTSVal != jt.firstTSVal) {
 			jt.tickRate = jt.lastPktTime.Sub(pktTime) / time.Duration(jt.lastTSVal-jt.firstTSVal)
 		} else {
 			jt.tickRate = time.Millisecond