From c2930f841ff5056d983e56140fcd0864138436a9 Mon Sep 17 00:00:00 2001
From: Rongli Sun <rongli@google.com>
Date: Wed, 15 Apr 2020 07:56:54 +0800
Subject: [PATCH] [meshcop] avoid unnecessary `RemoveUnsecurePort` (#4821)

---
 src/core/meshcop/joiner_router.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/meshcop/joiner_router.cpp b/src/core/meshcop/joiner_router.cpp
index 1d10c6e38..f3e973bba 100644
--- a/src/core/meshcop/joiner_router.cpp
+++ b/src/core/meshcop/joiner_router.cpp
@@ -91,6 +91,8 @@ void JoinerRouter::HandleStateChanged(otChangedFlags aFlags)
     }
     else
     {
+        VerifyOrExit(mSocket.IsBound());
+
         Get<Ip6::Filter>().RemoveUnsecurePort(mSocket.GetSockName().mPort);
 
         mSocket.Close();