From cf8ef91a295fda5f4c63f67ee440b3767ebceba6 Mon Sep 17 00:00:00 2001
From: Stefano Avallone <stavallo@unina.it>
Date: Wed, 20 Oct 2021 12:08:08 +0200
Subject: [PATCH] wifi: Do not check lifetime expiration when dequeuing frames

Frames are dequeued when they have been acknowledged, dropped
or are going to be replaced by other frames. In all such cases,
it is not needed to check for lifetime expiration. This check instead
causes troubles when the lifetime of a frame expires while receiving
the acknowledgment (a BAR may be scheduled unnecessarily).
---
 src/wifi/model/wifi-mac-queue.cc | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/wifi/model/wifi-mac-queue.cc b/src/wifi/model/wifi-mac-queue.cc
index 2ca1369ad..33dbbfcc9 100644
--- a/src/wifi/model/wifi-mac-queue.cc
+++ b/src/wifi/model/wifi-mac-queue.cc
@@ -550,12 +550,6 @@ WifiMacQueue::DoDequeue (ConstIterator pos)
 {
   NS_LOG_FUNCTION (this);
 
-  if (TtlExceeded (pos, Simulator::Now ()))
-    {
-      NS_LOG_DEBUG ("Packet lifetime expired");
-      return nullptr;
-    }
-
   Ptr<WifiMacQueueItem> item = Queue<WifiMacQueueItem>::DoDequeue (pos);
 
   if (item != 0 && item->GetHeader ().IsQosData ())