[router-table] remove from MTD build (#4730)

src/core/common/instance.hpp

@@ -416,10 +416,12 @@ template <> inline ChildTable &Instance::Get(void)
     return mThreadNetif.mMleRouter.mChildTable;
 }
 
+#if OPENTHREAD_FTD
 template <> inline RouterTable &Instance::Get(void)
 {
     return mThreadNetif.mMleRouter.mRouterTable;
 }
+#endif
 
 template <> inline Ip6::Netif &Instance::Get(void)
 {

src/core/thread/key_manager.cpp

@@ -124,6 +124,7 @@ otError KeyManager::SetMasterKey(const MasterKey &aKey)
     parent->SetLinkFrameCounter(0);
     parent->SetMleFrameCounter(0);
 
+#if OPENTHREAD_FTD
     // reset router frame counters
     for (RouterTable::Iterator iter(GetInstance()); !iter.IsDone(); iter++)
     {
@@ -131,6 +132,7 @@ otError KeyManager::SetMasterKey(const MasterKey &aKey)
         iter.GetRouter()->SetLinkFrameCounter(0);
         iter.GetRouter()->SetMleFrameCounter(0);
     }
+#endif
 
     // reset child frame counters
     for (ChildTable::Iterator iter(GetInstance(), Child::kInStateAnyExceptInvalid); !iter.IsDone(); iter++)

src/core/thread/mle_router_mtd.hpp

@@ -38,7 +38,6 @@
 
 #include "thread/child_table.hpp"
 #include "thread/mle.hpp"
-#include "thread/router_table.hpp"
 
 namespace ot {
 namespace Mle {
@@ -52,7 +51,6 @@ public:
     explicit MleRouter(Instance &aInstance)
         : Mle(aInstance)
         , mChildTable(aInstance)
-        , mRouterTable(aInstance)
     {
     }
 
@@ -85,8 +83,7 @@ public:
     bool HasSleepyChildrenSubscribed(const Ip6::Address &) { return false; }
 
 private:
-    ChildTable  mChildTable;
-    RouterTable mRouterTable;
+    ChildTable mChildTable;
 };
 
 } // namespace Mle

src/core/thread/router_table.hpp

@@ -29,6 +29,10 @@
 #ifndef ROUTER_TABLE_HPP_
 #define ROUTER_TABLE_HPP_
 
+#include "openthread-core-config.h"
+
+#if OPENTHREAD_FTD
+
 #include "common/encoding.hpp"
 #include "common/locator.hpp"
 #include "mac/mac_types.hpp"
@@ -38,8 +42,6 @@
 
 namespace ot {
 
-#if OPENTHREAD_FTD
-
 class RouterTable : public InstanceLocator
 {
 public:
@@ -361,32 +363,8 @@ private:
     uint8_t     mActiveRouterCount;
 };
 
-#endif // OPENTHREAD_FTD
-
-#if OPENTHREAD_MTD
-
-class RouterTable
-{
-public:
-    class Iterator
-    {
-    public:
-        explicit Iterator(Instance &) {}
-        void    Reset(void) {}
-        bool    IsDone(void) const { return true; }
-        void    Advance(void) {}
-        void    operator++(void) {}
-        void    operator++(int) {}
-        Router *GetRouter(void) { return NULL; }
-    };
-
-    explicit RouterTable(Instance &) {}
-
-    uint8_t GetNeighborCount(void) const { return 0; }
-};
-
-#endif // OPENTHREAD_MTD
-
 } // namespace ot
 
+#endif // OPENTHREAD_FTD
+
 #endif // ROUTER_TABLE_HPP_