e2ap: add generate_subscription_delete_failure

srsgnb/hdr/stack/ric/e2ap.h

@@ -58,6 +58,7 @@ public:
   e2_ap_pdu_c generate_subscription_response(ric_subscription_reponse_t ric_subscription_reponse);
   e2_ap_pdu_c generate_subscription_failure(ric_subscription_reponse_t ric_subscription_reponse);
   e2_ap_pdu_c generate_subscription_delete_response(ric_subscription_reponse_t ric_subscription_reponse);
+  e2_ap_pdu_c generate_subscription_delete_failure(ric_subscription_reponse_t ric_subscription_reponse);
   e2_ap_pdu_c generate_indication(ric_indication_t& ric_indication);
   e2_ap_pdu_c generate_reset_request();
   e2_ap_pdu_c generate_reset_response();

srsgnb/src/stack/ric/e2ap.cc

@@ -153,6 +153,29 @@ e2_ap_pdu_c e2ap::generate_subscription_delete_response(ric_subscription_reponse
   return pdu;
 }
 
+e2_ap_pdu_c e2ap::generate_subscription_delete_failure(ric_subscription_reponse_t ric_subscription_reponse)
+{
+  e2_ap_pdu_c             pdu;
+  unsuccessful_outcome_s& failure = pdu.set_unsuccessful_outcome();
+  failure.load_info_obj(ASN1_E2AP_ID_RICSUBSCRIPTION);
+  failure.crit                            = asn1::crit_opts::reject;
+  ricsubscription_delete_fail_s& sub_resp = failure.value.ricsubscription_delete_fail();
+
+  sub_resp->ri_crequest_id.crit                   = asn1::crit_opts::reject;
+  sub_resp->ri_crequest_id.id                     = ASN1_E2AP_ID_RI_CREQUEST_ID;
+  sub_resp->ri_crequest_id.value.ric_requestor_id = ric_subscription_reponse.ric_requestor_id;
+  sub_resp->ri_crequest_id.value.ric_instance_id  = ric_subscription_reponse.ric_instance_id;
+
+  sub_resp->ra_nfunction_id.crit   = asn1::crit_opts::reject;
+  sub_resp->ra_nfunction_id.id     = ASN1_E2AP_ID_RA_NFUNCTION_ID;
+  sub_resp->ra_nfunction_id->value = ric_subscription_reponse.ra_nfunction_id;
+
+  sub_resp->cause->set_misc(); // TODO: set the cause and crit_diagnostics properly
+  sub_resp->crit_diagnostics_present = false;
+
+  return pdu;
+}
+
 int e2ap::process_setup_response(e2setup_resp_s setup_response)
 {
   if (setup_procedure_transaction_id == setup_response->transaction_id.value.value) {

srsgnb/src/stack/ric/ric_subscription.cc

@@ -127,18 +127,24 @@ void ric_client::ric_subscription::delete_subscription()
     reporting_timer.stop();
   }
 
+  ric_subscription_reponse_t ric_subscription_reponse;
+  ric_subscription_reponse.ric_requestor_id = ric_requestor_id;
+  ric_subscription_reponse.ric_instance_id  = ric_instance_id;
+  ric_subscription_reponse.ra_nfunction_id  = ra_nfunction_id;
+
   // remove registered actions from SM
   if (sm_ptr) {
     for (auto& action : admitted_actions) {
       sm_ptr->remove_ric_action_definition(action);
     }
+  } else {
+    e2_ap_pdu_c send_pdu = parent->e2ap_.generate_subscription_delete_failure(ric_subscription_reponse);
+    parent->queue_send_e2ap_pdu(send_pdu);
+    return;
   }
 
   parent->logger.debug("Send RIC Subscription Delete Response to RIC Requestor ID: %i\n", ric_requestor_id);
-  ric_subscription_reponse_t ric_subscription_reponse;
+
-  ric_subscription_reponse.ric_requestor_id = ric_requestor_id;
-  ric_subscription_reponse.ric_instance_id  = ric_instance_id;
-  ric_subscription_reponse.ra_nfunction_id  = ra_nfunction_id;
   e2_ap_pdu_c send_pdu = parent->e2ap_.generate_subscription_delete_response(ric_subscription_reponse);
   parent->queue_send_e2ap_pdu(send_pdu);
 }