From 583873c1339d22e4dc9bd6a08b36db648c454aa9 Mon Sep 17 00:00:00 2001
From: Abtin Keshavarzian <abtink@google.com>
Date: Thu, 16 Jan 2020 18:55:49 -0800
Subject: [PATCH] [mle] log rloc16 changes (#4486)

---
 src/core/thread/mle.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/core/thread/mle.cpp b/src/core/thread/mle.cpp
index 4285a04e2..e2983de3f 100644
--- a/src/core/thread/mle.cpp
+++ b/src/core/thread/mle.cpp
@@ -962,6 +962,13 @@ uint16_t Mle::GetRloc16(void) const
 
 void Mle::SetRloc16(uint16_t aRloc16)
 {
+    uint16_t oldRloc16 = GetRloc16();
+
+    if (aRloc16 != oldRloc16)
+    {
+        otLogNoteMle("RLOC16 %04x -> %04x", oldRloc16, aRloc16);
+    }
+
     Get<ThreadNetif>().RemoveUnicastAddress(mMeshLocal16);
 
     Get<Mac::Mac>().SetShortAddress(aRloc16);