[mle] MTD to handle udp time sync message (#9978)

This commit add the possibility to handle a udp time sync message when
configured as MTD.

4 files changed, 46 insertions, 38 deletions

diff --git a/src/core/thread/mle.cpp b/src/core/thread/mle.cpp
index 7ba5d8705..99e6809f8 100644
--- a/src/core/thread/mle.cpp
+++ b/src/core/thread/mle.cpp
@@ -2652,13 +2652,13 @@ void Mle::HandleUdpReceive(Message &aMessage, const Ip6::MessageInfo &aMessageIn
     case kCommandChildIdRequest:
         Get<MleRouter>().HandleChildIdRequest(rxInfo);
         break;
+#endif // OPENTHREAD_FTD
 
 #if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
     case kCommandTimeSync:
-        Get<MleRouter>().HandleTimeSync(rxInfo);
+        HandleTimeSync(rxInfo);
         break;
 #endif
-#endif // OPENTHREAD_FTD
 
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
     case kCommandLinkMetricsManagementRequest:
@@ -3791,6 +3791,22 @@ exit:
 }
 #endif
 
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+void Mle::HandleTimeSync(RxInfo &aRxInfo)
+{
+    Log(kMessageReceive, kTypeTimeSync, aRxInfo.mMessageInfo.GetPeerAddr());
+
+    VerifyOrExit(aRxInfo.IsNeighborStateValid());
+
+    aRxInfo.mClass = RxInfo::kPeerMessage;
+
+    Get<TimeSync>().HandleTimeSyncMessage(aRxInfo.mMessage);
+
+exit:
+    return;
+}
+#endif
+
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE
 void Mle::HandleLinkMetricsManagementResponse(RxInfo &aRxInfo)
 {
@@ -4110,14 +4126,14 @@ const char *Mle::MessageTypeToString(MessageType aType)
         "Link Reject",             // (25) kTypeLinkReject
         "Link Request",            // (26) kTypeLinkRequest
         "Parent Request",          // (27) kTypeParentRequest
-#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-        "Time Sync", // (28) kTypeTimeSync
-#endif
 #endif
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE || OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
-        "Link Metrics Management Request",  // (29) kTypeLinkMetricsManagementRequest
-        "Link Metrics Management Response", // (30) kTypeLinkMetricsManagementResponse
-        "Link Probe",                       // (31) kTypeLinkProbe
+        "Link Metrics Management Request",  // (28) kTypeLinkMetricsManagementRequest
+        "Link Metrics Management Response", // (29) kTypeLinkMetricsManagementResponse
+        "Link Probe",                       // (30) kTypeLinkProbe
+#endif
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+        "Time Sync", // (31) kTypeTimeSync
 #endif
     };
 
@@ -4150,25 +4166,30 @@ const char *Mle::MessageTypeToString(MessageType aType)
     static_assert(kTypeLinkReject == 25, "kTypeLinkReject value is incorrect");
     static_assert(kTypeLinkRequest == 26, "kTypeLinkRequest value is incorrect");
     static_assert(kTypeParentRequest == 27, "kTypeParentRequest value is incorrect");
-#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-    static_assert(kTypeTimeSync == 28, "kTypeTimeSync value is incorrect");
-#if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE || OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
-    static_assert(kTypeLinkMetricsManagementRequest == 29, "kTypeLinkMetricsManagementRequest value is incorrect)");
-    static_assert(kTypeLinkMetricsManagementResponse == 30, "kTypeLinkMetricsManagementResponse value is incorrect)");
-    static_assert(kTypeLinkProbe == 31, "kTypeLinkProbe value is incorrect)");
-#endif
-#else // OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE || OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
     static_assert(kTypeLinkMetricsManagementRequest == 28, "kTypeLinkMetricsManagementRequest value is incorrect)");
     static_assert(kTypeLinkMetricsManagementResponse == 29, "kTypeLinkMetricsManagementResponse value is incorrect)");
     static_assert(kTypeLinkProbe == 30, "kTypeLinkProbe value is incorrect)");
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+    static_assert(kTypeTimeSync == 31, "kTypeTimeSync value is incorrect");
 #endif
-#endif // OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-#else  // OPENTHREAD_FTD
+#else
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+    static_assert(kTypeTimeSync == 28, "kTypeTimeSync value is incorrect");
+#endif
+#endif
+#else // OPENTHREAD_FTD
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE || OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
     static_assert(kTypeLinkMetricsManagementRequest == 16, "kTypeLinkMetricsManagementRequest value is incorrect)");
     static_assert(kTypeLinkMetricsManagementResponse == 17, "kTypeLinkMetricsManagementResponse value is incorrect)");
     static_assert(kTypeLinkProbe == 18, "kTypeLinkProbe value is incorrect)");
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+    static_assert(kTypeTimeSync == 19, "kTypeTimeSync value is incorrect");
+#endif
+#else
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+    static_assert(kTypeTimeSync == 16, "kTypeTimeSync value is incorrect");
+#endif
 #endif
 #endif // OPENTHREAD_FTD
 
diff --git a/src/core/thread/mle.hpp b/src/core/thread/mle.hpp
index 208922bcd..873e33835 100644
--- a/src/core/thread/mle.hpp
+++ b/src/core/thread/mle.hpp
@@ -973,15 +973,15 @@ private:
         kTypeLinkReject,
         kTypeLinkRequest,
         kTypeParentRequest,
-#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-        kTypeTimeSync,
-#endif
 #endif
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_INITIATOR_ENABLE || OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
         kTypeLinkMetricsManagementRequest,
         kTypeLinkMetricsManagementResponse,
         kTypeLinkProbe,
 #endif
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+        kTypeTimeSync,
+#endif
     };
 
     //------------------------------------------------------------------------------------------------------------------
@@ -1313,6 +1313,10 @@ private:
     void         UpdateServiceAlocs(void);
 #endif
 
+#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
+    void HandleTimeSync(RxInfo &aRxInfo);
+#endif
+
 #if OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
     void  HandleLinkMetricsManagementRequest(RxInfo &aRxInfo);
     void  HandleLinkProbe(RxInfo &aRxInfo);
diff --git a/src/core/thread/mle_router.cpp b/src/core/thread/mle_router.cpp
index b7489e651..b55341f9b 100644
--- a/src/core/thread/mle_router.cpp
+++ b/src/core/thread/mle_router.cpp
@@ -3891,20 +3891,6 @@ exit:
 }
 
 #if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-void MleRouter::HandleTimeSync(RxInfo &aRxInfo)
-{
-    Log(kMessageReceive, kTypeTimeSync, aRxInfo.mMessageInfo.GetPeerAddr());
-
-    VerifyOrExit(aRxInfo.IsNeighborStateValid());
-
-    aRxInfo.mClass = RxInfo::kPeerMessage;
-
-    Get<TimeSync>().HandleTimeSyncMessage(aRxInfo.mMessage);
-
-exit:
-    return;
-}
-
 Error MleRouter::SendTimeSync(void)
 {
     Error        error = kErrorNone;
diff --git a/src/core/thread/mle_router.hpp b/src/core/thread/mle_router.hpp
index 3deda33dc..955674c42 100644
--- a/src/core/thread/mle_router.hpp
+++ b/src/core/thread/mle_router.hpp
@@ -649,9 +649,6 @@ private:
     void  HandleDataRequest(RxInfo &aRxInfo);
     void  HandleNetworkDataUpdateRouter(void);
     void  HandleDiscoveryRequest(RxInfo &aRxInfo);
-#if OPENTHREAD_CONFIG_TIME_SYNC_ENABLE
-    void HandleTimeSync(RxInfo &aRxInfo);
-#endif
 
     Error ProcessRouteTlv(const RouteTlv &aRouteTlv, RxInfo &aRxInfo);
     Error ReadAndProcessRouteTlvOnFed(RxInfo &aRxInfo, uint8_t aParentId);