UDP is a simple stateless transport layer (AKA OSI layer 4) protocol, one of the core Internet protocols. It provides source and destination ports, basic checksumming, but provides not guarantees of delivery, order of packets, or duplicate delivery.
This page hosts a formal specification of UDP (User Datagram Protocol) datagram using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
// Code generated by kaitai-struct-compiler from a .ksy source file. DO NOT EDIT.
import "github.com/kaitai-io/kaitai_struct_go_runtime/kaitai"
/**
* UDP is a simple stateless transport layer (AKA OSI layer 4)
* protocol, one of the core Internet protocols. It provides source and
* destination ports, basic checksumming, but provides not guarantees
* of delivery, order of packets, or duplicate delivery.
*/
type UdpDatagram struct {
SrcPort uint16
DstPort uint16
Length uint16
Checksum uint16
Body []byte
_io *kaitai.Stream
_root *UdpDatagram
_parent interface{}
}
func NewUdpDatagram() *UdpDatagram {
return &UdpDatagram{
}
}
func (this *UdpDatagram) Read(io *kaitai.Stream, parent interface{}, root *UdpDatagram) (err error) {
this._io = io
this._parent = parent
this._root = root
tmp1, err := this._io.ReadU2be()
if err != nil {
return err
}
this.SrcPort = uint16(tmp1)
tmp2, err := this._io.ReadU2be()
if err != nil {
return err
}
this.DstPort = uint16(tmp2)
tmp3, err := this._io.ReadU2be()
if err != nil {
return err
}
this.Length = uint16(tmp3)
tmp4, err := this._io.ReadU2be()
if err != nil {
return err
}
this.Checksum = uint16(tmp4)
tmp5, err := this._io.ReadBytes(int((this.Length - 8)))
if err != nil {
return err
}
tmp5 = tmp5
this.Body = tmp5
return err
}