Add new test API for clearing Thread stack values (#1624)

Reset Thread cached values:
 -link configuration

Author: Arto Kinnunen

nanostack/net_thread_test.h

@@ -274,6 +274,19 @@ int thread_test_increment_key_sequence_counter(int8_t interface_id);
  */
 int thread_test_key_sequence_counter_update(int8_t interface_id, uint32_t thrKeySequenceCounter);
 
+/**
+ * \brief Resets cached values from stack
+ *
+ Resets link configuration from cache and from  NVM.
+ *
+  *
+ * \param interface_id Network Interface
+  *
+ * \return 0, OK
+ * \return <0 Error
+ */
+int thread_test_stack_cache_reset(int8_t interface_id);
+
 /**
  * \brief Set new Thread key rotation value
  *

source/6LoWPAN/Thread/thread_test_api.c

@@ -47,6 +47,7 @@
 #include "6LoWPAN/Thread/thread_bootstrap.h"
 #include "6LoWPAN/Thread/thread_router_bootstrap.h"
 #include "6LoWPAN/Thread/thread_discovery.h"
+#include "6LoWPAN/Thread/thread_nvm_store.h"
 #include "6LoWPAN/Thread/thread_extension_bootstrap.h"
 #include "MLE/mle.h"
 #include "thread_meshcop_lib.h"
@@ -413,6 +414,27 @@ int thread_test_key_sequence_counter_update(int8_t interface_id, uint32_t thrKey
 #endif
 }
 
+int thread_test_stack_cache_reset(int8_t interface_id)
+{
+#ifdef HAVE_THREAD
+    protocol_interface_info_entry_t *cur;
+
+    cur = protocol_stack_interface_info_get_by_id(interface_id);
+    if (!cur) {
+        tr_warn("Invalid interface id");
+        return -1;
+    }
+
+    // Reset link information
+    (void) thread_nvm_store_link_info_clear();
+
+    return 0;
+#else
+    (void)interface_id;
+    return -1;
+#endif
+}
+
 int thread_test_key_rotation_update(int8_t interface_id, uint32_t thrKeyRotation)
 {
 #ifdef HAVE_THREAD