R: rbc_ctc_alarm_event_t; rbc_ctc_cmd_assign_train_describer_t; rbc_ctc_cmd_emergency_stop_t; rbc_ctc_cmd_revoke_emergency_stop_t; rbc_ctc_cmd_revoke_tsr_t; rbc_ctc_cmd_set_tsr_t; rbc_ctc_command_t; rbc_ctc_header_t; rbc_ctc_ind_alarm_t; rbc_ctc_ind_health_t; rbc_ctc_ind_ma_status_t; rbc_ctc_ind_train_connected_t; rbc_ctc_ind_train_disconnected_t; rbc_ctc_ind_train_telemetry_t; rbc_ctc_indication_t; rbc_ctc_train_describer_t; rbc_ctc_train_telemetry_t; rbc_ctc_tsr_command_t; rbc_il_header_t; rbc_il_inbound_msg_t; rbc_il_lx_status_t; rbc_il_msg_emergency_stop_t; rbc_il_msg_keepalive_t; rbc_il_msg_lx_status_t; rbc_il_msg_ma_confirmation_t; rbc_il_msg_point_status_t; rbc_il_msg_route_status_t; rbc_il_msg_section_release_request_t; rbc_il_msg_signal_aspect_t; rbc_il_msg_track_occupancy_t; rbc_il_msg_train_footprint_t; rbc_il_outbound_msg_t; rbc_il_point_status_t; rbc_il_route_info_t; rbc_il_section_status_t; rbc_il_signal_status_t; rbc_nid_lrbg_t

U: rbc_ctc_command_t::[union].payload; rbc_ctc_indication_t::[union].payload; rbc_il_inbound_msg_t::[union].payload; rbc_il_outbound_msg_t::[union].payload