dhcpd

Documentation

Overview

Package dhcpd contains snippets from MIT-licensed coredhcp project at https://github.com/coredhcp/coredhcp

Package dhcpd contains snippets from MIT-licensed coredhcp project at https://github.com/coredhcp/coredhcp

Index

• Constants
• func InjectArp(ip net.IP, mac net.HardwareAddr, flags int32, dev string) (err error)
• func InjectArpFd(fd uintptr, ip net.IP, mac net.HardwareAddr, flags int32, dev string) (err error)
• type Server
  • func NewServer(addr, ifname string, store *store.Store) (server *Server, err error)
  • func (server *Server) HandleMsg4(buf []byte, oob *ipv4.ControlMessage, peer net.Addr)
  • func (server *Server) Serve()
• type Uint8
  • func (o *Uint8) FromBytes(data []byte) error
  • func (o Uint8) String() string
  • func (o Uint8) ToBytes() []byte

Constants

const (
	// completed entry (ha valid)
	ATF_COM = 0x02
	// permanent entry
	ATF_PERM = 0x04
	// publish entry
	ATF_PUBL = 0x08
	// has requested trailers
	ATF_USETRAILERS = 0x10
	// want to use a netmask (only for proxy entries)
	ATF_NETMASK = 0x20
	// don't answer this addresses
	ATF_DONTPUB = 0x40
)

ARP Flag values these are not in golang.org/x/sys/unix

const MaxDatagram = 1 << 16

MaxDatagram is the maximum length of message that can be received.

Functions

func InjectArp

func InjectArp(ip net.IP, mac net.HardwareAddr, flags int32, dev string) (err error)

syscalls roughly based on https://www.unix.com/302447674-post3.html see:

https://github.com/torvalds/linux/blob/8cf8821e15cd553339a5b48ee555a0439c2b2742/net/ipv4/arp.c#L1179
https://github.com/torvalds/linux/blob/8cf8821e15cd553339a5b48ee555a0439c2b2742/net/ipv4/arp.c#L1024

func InjectArpFd

func InjectArpFd(fd uintptr, ip net.IP, mac net.HardwareAddr, flags int32, dev string) (err error)

Types

type Server

type Server struct {
	UdpConn *net.UDPConn
	*ipv4.PacketConn
	net.Interface
	// contains filtered or unexported fields
}

func NewServer

func NewServer(addr, ifname string, store *store.Store) (server *Server, err error)

func (*Server) HandleMsg4

func (server *Server) HandleMsg4(buf []byte, oob *ipv4.ControlMessage, peer net.Addr)

func (*Server) Serve

func (server *Server) Serve()

type Uint8

type Uint8 uint8

Uint8 mirrors dhcpv4.Uint16

func (*Uint8) FromBytes

func (o *Uint8) FromBytes(data []byte) error

FromBytes decodes data into o as per RFC 2132, Section 9.10.

func (Uint8) String

func (o Uint8) String() string

String returns a human-readable string for this option.

func (Uint8) ToBytes

func (o Uint8) ToBytes() []byte

ToBytes returns a serialized stream of bytes for this option.