add deregistration process

src/amf-app/amf_n1.cpp

@@ -2714,6 +2714,18 @@ void amf_n1::ue_initiate_de_registration_handle(uint32_t ran_ue_ngap_id,
   bstring b = blk2bstr(buffer, encoded_size);
   itti_send_dl_nas_buffer_to_task_n2(b, ran_ue_ngap_id, amf_ue_ngap_id);
 
+  Logger::ngap().debug("sending itti ue context release command to TASK_AMF_N2"); 
+  itti_ue_context_release_command * itti_msg = new itti_ue_context_release_command(TASK_AMF_N1, TASK_AMF_N2);
+   itti_msg->amf_ue_ngap_id = amf_ue_ngap_id;
+   itti_msg->ran_ue_ngap_id = ran_ue_ngap_id;
+   itti_msg->cause.setChoiceOfCause(Ngap_Cause_PR_nas);
+   itti_msg->cause.setValue(Ngap_CauseNas_deregister);
+   std::shared_ptr<itti_ue_context_release_command> i = std::shared_ptr<itti_ue_context_release_command>(itti_msg); 
+   int ret = itti_inst->send_msg(i); 
+   if (ret != 0) {
+     Logger::ngap().error("Could not send ITTI message %s to task TASK_AMF_N2", i->get_msg_name());
+   }
+
   set_5gmm_state(nc, _5GMM_DEREGISTERED);
   if (nc.get()->is_stacs_available) {
     stacs.update_5gmm_state(nc.get()->imsi, "5GMM-DEREGISTERED");

src/amf-app/amf_n2.cpp

@@ -902,12 +902,12 @@ void amf_n2::handle_itti_message(itti_ue_context_release_command& itti_msg) {
   if (itti_msg.cause.getChoiceOfCause() == Ngap_Cause_PR_nas) {
     ueCtxRelCmd->setCauseNas((e_Ngap_CauseNas) itti_msg.cause.getValue());
   }
-  if (itti_msg.cause.getChoiceOfCause() == Ngap_Cause_PR_radioNetwork) {
+  else if (itti_msg.cause.getChoiceOfCause() == Ngap_Cause_PR_radioNetwork) {
     ueCtxRelCmd->setCauseRadioNetwork(
         (e_Ngap_CauseRadioNetwork) itti_msg.cause.getValue());
   }
-  uint8_t buffer[200];
-  int encoded_size = ueCtxRelCmd->encode2buffer(buffer, 200);
+  uint8_t buffer[BUFFER_SIZE_512];
+  int encoded_size = ueCtxRelCmd->encode2buffer(buffer, BUFFER_SIZE_512);
   delete ueCtxRelCmd;
   bstring b = blk2bstr(buffer, encoded_size);
   sctp_s_38412.sctp_send_msg(