dhcpmsg

Documentation

Index

• Constants
• type DHCPOpt
  • func OptionClientIdentifier(hwaddr net.HardwareAddr) DHCPOpt
  • func OptionDNS(ip ...net.IP) DHCPOpt
  • func OptionDomainName(n string) DHCPOpt
  • func OptionHostname(n string) DHCPOpt
  • func OptionIPAddressLeaseDuration(d time.Duration) DHCPOpt
  • func OptionInterfaceMTU(size uint16) DHCPOpt
  • func OptionMaxMessageSize(size uint16) DHCPOpt
  • func OptionNTP(ip ...net.IP) DHCPOpt
  • func OptionParametersList(params ...uint8) DHCPOpt
  • func OptionRequestedIP(ip net.IP) DHCPOpt
  • func OptionRouter(ip net.IP) DHCPOpt
  • func OptionServerIdentifier(ip net.IP) DHCPOpt
  • func OptionSubnetMask(mask net.IPMask) DHCPOpt
  • func OptionType(t uint8) DHCPOpt
• type DecodedOptions
  • func DecodeOptions(opts []DHCPOpt) DecodedOptions
• type Message
  • func Decode(b []byte) (*Message, error)
  • func (msg Message) Assemble() []byte

Constants

const (
	OpRequest = 1
	OpReply   = 2
)

const (
	MsgTypeDiscover = 1
	MsgTypeOffer    = 2
	MsgTypeRequest  = 3
	MsgTypeAck      = 5
	MsgTypeNack     = 6
)

const (
	OptPadding                = 0
	OptSubnetMask             = 1
	OptRouter                 = 3
	OptDNS                    = 6
	OptHostname               = 12
	OptDomainName             = 15
	OptInterfaceMTU           = 26
	OptBroadcastAddress       = 28
	OptNTP                    = 42
	OptRequestedIP            = 50
	OptIPAddressLeaseDuration = 51
	OptMessageType            = 53
	OptServerIdentifier       = 54
	OptParametersList         = 55
	OptMessage                = 56
	OptMaxMessageSize         = 57
	OptRenewalDuration        = 58
	OptRebindDuration         = 59
	OptClientIdentifier       = 61
	OptEnd                    = 255
)

const (
	DHCPCookie = 0x63825363
)

const (
	FlagBroadcast = 1 << 15
)

const (
	HtypeETHER = 1
)

Types

type DHCPOpt

type DHCPOpt struct {
	Option uint8
	Data   []byte
}

func OptionClientIdentifier

func OptionClientIdentifier(hwaddr net.HardwareAddr) DHCPOpt

func OptionDNS

func OptionDNS(ip ...net.IP) DHCPOpt

func OptionDomainName

func OptionDomainName(n string) DHCPOpt

func OptionHostname

func OptionHostname(n string) DHCPOpt

func OptionIPAddressLeaseDuration

func OptionIPAddressLeaseDuration(d time.Duration) DHCPOpt

func OptionInterfaceMTU

func OptionInterfaceMTU(size uint16) DHCPOpt

func OptionMaxMessageSize

func OptionMaxMessageSize(size uint16) DHCPOpt

func OptionNTP

func OptionNTP(ip ...net.IP) DHCPOpt

func OptionParametersList

func OptionParametersList(params ...uint8) DHCPOpt

func OptionRequestedIP

func OptionRequestedIP(ip net.IP) DHCPOpt

func OptionRouter

func OptionRouter(ip net.IP) DHCPOpt

func OptionServerIdentifier

func OptionServerIdentifier(ip net.IP) DHCPOpt

func OptionSubnetMask

func OptionSubnetMask(mask net.IPMask) DHCPOpt

func OptionType

func OptionType(t uint8) DHCPOpt

type DecodedOptions

type DecodedOptions struct {
	MessageType            uint8
	MaxMessageSize         uint16
	InterfaceMTU           uint16
	RequestedIP            net.IP
	ServerIdentifier       net.IP
	BroadcastAddress       net.IP
	SubnetMask             net.IPMask
	Routers                []net.IP
	DNS                    []net.IP
	IPAddressLeaseDuration time.Duration
	RenewalDuration        time.Duration
	RebindDuration         time.Duration
	DomainName             string
	ClientIdentifier       []byte
	Message                string
	ParametersList         []uint8
}

func DecodeOptions

func DecodeOptions(opts []DHCPOpt) DecodedOptions

type Message

type Message struct {
	Op             uint8
	Htype          uint8
	Hops           uint8
	Xid            uint32
	Secs           uint16
	Flags          uint16
	ClientIP       net.IP
	YourIP         net.IP
	NextIP         net.IP
	RelayIP        net.IP
	ClientMAC      net.HardwareAddr
	ServerHostName [64]byte
	BootFilename   [128]byte
	Cookie         uint32
	Options        []DHCPOpt
}

func Decode

func Decode(b []byte) (*Message, error)

func (Message) Assemble

func (msg Message) Assemble() []byte

Assemble assembles a dhcp message into raw bytes.