pub(all) struct LldpNeighbor {
  chassis_id : String
  port_id : String
  ttl : Int
  system_name : String
  system_description : String
  port_description : String
  management_address : String
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

pub(all) struct LldpTlv {
  tlv_type : Int
  length : Int
  value : Bytes
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

fn build_lldp_frame(chassis_id : Bytes, port_id : Bytes, ttl : Int, system_name? : String) -> Bytes

fn encode_tlv(tlv_type : Int, value : Bytes) -> Bytes

let ether_type_lldp : Int

fn extract_neighbor(tlvs : Array[LldpTlv]) -> LldpNeighbor

fn format_neighbor(n : LldpNeighbor) -> String

let lldp_multicast_mac : String

let oui_ieee_802_1 : Bytes

let oui_ieee_802_3 : Bytes

let oui_profinet : Bytes

fn parse_lldp_tlvs(data : Bytes, offset : Int) -> Array[LldpTlv] raise 
@mokomoking2501/profinet_master/frame.FrameError
FrameError

let tlv_type_chassis_id : Int

let tlv_type_end : Int

fn tlv_type_label(tlv_type : Int) -> String

let tlv_type_management_address : Int

let tlv_type_port_description : Int

let tlv_type_port_id : Int

let tlv_type_system_capabilities : Int

let tlv_type_system_description : Int

let tlv_type_system_name : Int

let tlv_type_ttl : Int