From 85af5f196393110287904b3a2bb432e25d99d961 Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@google.com>
Date: Fri, 17 Jul 2020 08:50:09 -0700
Subject: [PATCH] [meshcop] do not allow timestamp rollback on leader (#5249)

---
 src/core/meshcop/dataset_manager.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/meshcop/dataset_manager.cpp b/src/core/meshcop/dataset_manager.cpp
index 71efbd9d0..16c1eb41d 100644
--- a/src/core/meshcop/dataset_manager.cpp
+++ b/src/core/meshcop/dataset_manager.cpp
@@ -169,6 +169,7 @@ otError DatasetManager::Save(const Dataset &aDataset)
     }
     else if (compare < 0)
     {
+        VerifyOrExit(!Get<Mle::MleRouter>().IsLeader(), error = OT_ERROR_INVALID_STATE);
         SendSet();
     }