Fix Mobility Registration Update

src/amf-app/amf_n1.cpp

@@ -3373,19 +3373,28 @@ void amf_n1::sha256(
 void amf_n1::run_mobility_registration_update_procedure(
     std::shared_ptr<nas_context>& nc, uint16_t uplink_data_status,
     uint16_t pdu_session_status) {
-  // Encoding REGISTRATION ACCEPT
-  auto reg_accept = std::make_unique<RegistrationAccept>();
-  initialize_registration_accept(reg_accept);
-  reg_accept->Set5gsNetworkFeatureSupport(
-      0x00, 0x00);  // TODO: remove hardcoded values
-
-  std::shared_ptr<pdu_session_context> psc = {};
   std::shared_ptr<ue_context> uc = {};
   if (!find_ue_context(nc, uc)) {
     Logger::amf_n1().warn("Cannot find the UE context");
     return;
   }
 
+  nas_secu_ctx* secu = nc->security_ctx;
+  if (!secu) {
+    Logger::amf_n1().warn("No Security Context found");
+    // Run Registration procedure
+    run_registration_procedure(nc);
+    return;
+  }
+
+  std::shared_ptr<pdu_session_context> psc = {};
+
+  // Encoding REGISTRATION ACCEPT
+  auto reg_accept = std::make_unique<RegistrationAccept>();
+  initialize_registration_accept(reg_accept);
+  reg_accept->Set5gsNetworkFeatureSupport(
+      0x00, 0x00);  // TODO: remove hardcoded values
+
   reg_accept->Set5gGuti(
       amf_cfg.guami.mcc, amf_cfg.guami.mnc, amf_cfg.guami.regionID,
       amf_cfg.guami.AmfSetID, amf_cfg.guami.AmfPointer, uc->tmsi);
@@ -3399,12 +3408,6 @@ void amf_n1::run_mobility_registration_update_procedure(
     return;
   }
 
-  nas_secu_ctx* secu = nc->security_ctx;
-  if (!secu) {
-    Logger::amf_n1().error("No Security Context found");
-    return;
-  }
-
   // protect nas message
   bstring protected_nas = nullptr;
   encode_nas_message_protected(