try to fix issue for recovery_time_stamp when testing with dsTester (UPF)

src/smf_app/smf_n4.cpp

@@ -215,7 +215,12 @@ smf_n4::smf_n4()
       std::chrono::system_clock::now();
   std::time_t now_c = std::chrono::system_clock::to_time_t(now);
   std::time_t ellapsed = now_c - time_epoch;
-  recovery_time_stamp = ellapsed;
+  //recovery_time_stamp = ellapsed;
+
+  //test new way to calculate recovery_time_stamp
+  std::time_t time_epoch_ntp = std::time(nullptr);
+  uint64_t tv_ntp = time_epoch_ntp + SECONDS_SINCE_FIRST_EPOCH;
+  recovery_time_stamp = tv_ntp;
   
   // TODO may load this from config
   cp_function_features = { };
@@ -560,9 +565,12 @@ void smf_n4::send_n4_msg(itti_n4_session_report_response &i) {
 
 //------------------------------------------------------------------------------
 void smf_n4::send_heartbeat_request(std::shared_ptr<pfcp_association> &a) {
+  std::time_t time_epoch = std::time(nullptr);
+  uint64_t tv_ntp = time_epoch + SECONDS_SINCE_FIRST_EPOCH;
+
   pfcp::pfcp_heartbeat_request h = { };
   pfcp::recovery_time_stamp_t r = { .recovery_time_stamp =
-      (uint32_t) recovery_time_stamp };
+      (uint32_t) tv_ntp };
   h.set(r);
 
   pfcp::node_id_t &node_id = a->node_id;

src/smf_app/smf_procedure.cpp

@@ -1346,9 +1346,11 @@ void session_release_sm_context_procedure::handle_itti_msg(
     problem_details.setCause(
         pdu_session_application_error_e2str[PDU_SESSION_APPLICATION_ERROR_NETWORK_FAILURE]);
     //trigger to send reply to AMF
+    /*
     smf_app_inst->trigger_http_response(
     http_status_code_e::HTTP_STATUS_CODE_406_NOT_ACCEPTABLE,
     n11_triggered_pending->pid, N11_SESSION_RELEASE_SM_CONTEXT_RESPONSE);
+    */
   }
 
   //TODO: