From 5c8af41eb2735dec09e7dc5418cdd89d19a1824f Mon Sep 17 00:00:00 2001
From: Abtin Keshavarzian <abtink@google.com>
Date: Mon, 2 Dec 2024 15:21:36 -0800
Subject: [PATCH] [indirect-sender] reset message timestamp on child mode
 change to non-sleepy (#10979)

This commit resets (to now) the timestamp of queued messages for a
previously sleepy child when the child mode changes to non-sleepy.
This ensures that delay-aware queue management is correctly applied
to these messages and avoids them being dropped immediately.
---
 src/core/thread/indirect_sender.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/thread/indirect_sender.cpp b/src/core/thread/indirect_sender.cpp
index b18bbf6ea7b..b465c8de8cf 100644
--- a/src/core/thread/indirect_sender.cpp
+++ b/src/core/thread/indirect_sender.cpp
@@ -205,6 +205,7 @@ void IndirectSender::HandleChildModeChange(Child &aChild, Mle::DeviceMode aOldMo
             {
                 message.GetIndirectTxChildMask().Remove(childIndex);
                 message.SetDirectTransmission();
+                message.SetTimestampToNow();
             }
         }