udp

Documentation

Overview

Package udp implements the UDP header support in Lucius.

Index

• type UDP
  • func (udp *UDP) Field(id fwdpacket.FieldID) ([]byte, error)
  • func (udp *UDP) Header() []byte
  • func (UDP) ID(int) fwdpb.PacketHeaderId
  • func (UDP) Modify(_ fwdpb.PacketHeaderId) error
  • func (udp *UDP) Rebuild() error
  • func (udp *UDP) Remove(id fwdpb.PacketHeaderId) error
  • func (UDP) Trailer() []byte
  • func (udp *UDP) UpdateField(id fwdpacket.FieldID, op int, arg []byte) (bool, error)

Types

type UDP

type UDP struct {
	// contains filtered or unexported fields
}

An UDP represents a UDP header in the packet. It can add, remove and update the UDP header. The UDP payload is treated as OPAQUE.

func (*UDP) Field

func (udp *UDP) Field(id fwdpacket.FieldID) ([]byte, error)

Field finds bytes within the UDP header.

func (*UDP) Header

func (udp *UDP) Header() []byte

Header returns the UDP header.

func (UDP) ID

func (UDP) ID(int) fwdpb.PacketHeaderId

ID returns the UDP protocol header ID.

func (UDP) Modify

func (UDP) Modify(_ fwdpb.PacketHeaderId) error

Modify returns an error as the UDP header has not extensions.

func (*UDP) Rebuild

func (udp *UDP) Rebuild() error

Rebuild updates the UDP header length and csum (if over IPv6).

func (*UDP) Remove

func (udp *UDP) Remove(id fwdpb.PacketHeaderId) error

Remove removes the UDP header.

func (UDP) Trailer

func (UDP) Trailer() []byte

Trailer returns the no trailing bytes.

func (*UDP) UpdateField

func (udp *UDP) UpdateField(id fwdpacket.FieldID, op int, arg []byte) (bool, error)

UpdateField sets bytes within the UDP header.