From 90634468bb1f9b7daf22b653b40cc4c637789ff3 Mon Sep 17 00:00:00 2001
From: Chan Ruihua <chenrh20@mails.tsinghua.edu.cn>
Date: Sun, 11 Sep 2022 17:16:20 +0000
Subject: [PATCH] tcp: (fixes #735) BBR fails to discard invalid samples

---
 src/internet/model/tcp-bbr.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/internet/model/tcp-bbr.cc b/src/internet/model/tcp-bbr.cc
index 8227dd1c5..889e66f03 100644
--- a/src/internet/model/tcp-bbr.cc
+++ b/src/internet/model/tcp-bbr.cc
@@ -615,7 +615,7 @@ TcpBbr::UpdateBottleneckBandwidth(Ptr<TcpSocketState> tcb, const TcpRateOps::Tcp
 {
     NS_LOG_FUNCTION(this << tcb << rs);
 
-    if (rs.m_deliveryRate == 0)
+    if (rs.m_delivered < 0 || rs.m_interval.IsZero())
     {
         return;
     }