message

package
v0.0.0-...-48a15a0 Latest Latest
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 Go to latest Published: Aug 14, 2022 License: 0BSD Imports: 14 Imported by: 0

Documentation

Overview

message contains SOCKS 6 wireformat parser and serializer

Index

Constants

View Source 
const (
	Socks5Version = 5
	MaxOptionSize = 20 * 1024
)
View Source 
const (
	// lv1.
	StackOptionIPTOS          = int(StackOptionLevelIP)*256 + int(StackOptionCodeTOS)
	StackOptionIPHappyEyeball = int(StackOptionLevelIP)*256 + int(StackOptionCodeHappyEyeball)
	StackOptionIPTTL          = int(StackOptionLevelIP)*256 + int(StackOptionCodeTTL)
	StackOptionIPNoFragment   = int(StackOptionLevelIP)*256 + int(StackOptionCodeNoFragment)
	// lv4.
	StackOptionTCPTFO       = int(StackOptionLevelTCP)*256 + int(StackOptionCodeTFO)
	StackOptionTCPMultipath = int(StackOptionLevelTCP)*256 + int(StackOptionCodeMultipath)
	StackOptionTCPBacklog   = int(StackOptionLevelTCP)*256 + int(StackOptionCodeBacklog)
	// lv5.
	StackOptionUDPUDPError   = int(StackOptionLevelUDP)*256 + int(StackOptionCodeUDPError)
	StackOptionUDPPortParity = int(StackOptionLevelUDP)*256 + int(StackOptionCodePortParity)
)
View Source 
const (
	StackPortParityOptionParityNo   byte = 0
	StackPortParityOptionParityEven byte = 1
	StackPortParityOptionParityOdd  byte = 2
)

Variables

View Source 
var ErrAddressTypeNotSupport = common.LeveledError{
	Message: "unsupported address type",
	Base:    ErrMessageProcess,
	Level:   lg.LvError,
}
View Source 
var ErrBufferSize = common.LeveledError{
	Message: "invalid buffer size",
	Base:    ErrMessageProcess,
	Level:   lg.LvWarning,
}
View Source 
var ErrEnumValue = common.LeveledError{
	Message: "invalid enum value",
	Base:    ErrMessageProcess,
	Level:   lg.LvError,
}
View Source 
var ErrFormat = common.LeveledError{
	Message: "format error",
	Base:    ErrMessageProcess,
	Level:   lg.LvError,
}
View Source 
var ErrMessageProcess = errors.New("message error")
View Source 
var ErrOptionTooLong = common.LeveledError{
	Message: "option too long",
	Base:    ErrMessageProcess,
	Level:   lg.LvWarning,
}
View Source 
var ErrStackOptionNoLeg = common.LeveledError{
	Message: "stack option should have at least one leg",
	Base:    ErrMessageProcess,
	Level:   lg.LvWarning,
}

Functions

func ConvertNetIPAddrPort 

func ConvertNetIPAddrPort(addr net.Addr) netip.AddrPort

ConvertNetIPAddrPort convert net.Addr to netip.AddrPort, when fail, return default netip.AddrPort.

func GetAssociationID 

func GetAssociationID(b []byte) uint64

func NewErrVersionMismatch 

func NewErrVersionMismatch(v int, b []byte) error

func SetOptionDataParser 

func SetOptionDataParser(kind OptionKind, fn func([]byte) (OptionData, error))

SetOptionDataParser set the option data parse function for given kind to fn set fn to nil to clear parser.

func SetStackOptionDataParser 

func SetStackOptionDataParser(lv StackOptionLevel, code StackOptionCode, fn func([]byte) (StackOptionData, error))

SetStackOptionDataParser set the stack option data parse function for given level and code to fn set fn to nil to clear parser.

func SplitStackOptionID 

func SplitStackOptionID(id int) (StackOptionLevel, StackOptionCode)

func StackOptionID 

func StackOptionID(level StackOptionLevel, code StackOptionCode) int

Types

type AddressType 

type AddressType byte
const (
	AddressTypeIPv4       AddressType = 1
	AddressTypeDomainName AddressType = 3
	AddressTypeIPv6       AddressType = 4
)

type AuthenticationDataOptionData 

type AuthenticationDataOptionData struct {
	Method byte
	Data   []byte
}

func (AuthenticationDataOptionData) Len 

func (s AuthenticationDataOptionData) Len() uint16

func (AuthenticationDataOptionData) Marshal 

func (s AuthenticationDataOptionData) Marshal() []byte

type AuthenticationMethodAdvertisementOptionData 

type AuthenticationMethodAdvertisementOptionData struct {
	InitialDataLength uint16
	Methods           []byte
}

func (AuthenticationMethodAdvertisementOptionData) Len 

func (a AuthenticationMethodAdvertisementOptionData) Len() uint16

func (AuthenticationMethodAdvertisementOptionData) Marshal 

func (a AuthenticationMethodAdvertisementOptionData) Marshal() []byte

type AuthenticationMethodSelectionOptionData 

type AuthenticationMethodSelectionOptionData struct {
	Method byte
}

func (AuthenticationMethodSelectionOptionData) Marshal 

func (s AuthenticationMethodSelectionOptionData) Marshal() []byte

type AuthenticationReply 

type AuthenticationReply struct {
	Type    AuthenticationReplyType
	Options *OptionSet
}

func NewAuthenticationReply 

func NewAuthenticationReply() *AuthenticationReply

func NewAuthenticationReplyWithType 

func NewAuthenticationReplyWithType(typ AuthenticationReplyType) *AuthenticationReply

func ParseAuthenticationReplyFrom 

func ParseAuthenticationReplyFrom(b io.Reader) (*AuthenticationReply, error)

func (*AuthenticationReply) Marshal 

func (a *AuthenticationReply) Marshal() []byte

type AuthenticationReplyType 

type AuthenticationReplyType byte
const (
	AuthenticationReplySuccess AuthenticationReplyType = 0
	AuthenticationReplyFail    AuthenticationReplyType = 1
)

type BacklogOptionData 

type BacklogOptionData struct {
	Backlog uint16
}

func (BacklogOptionData) GetData 

func (t BacklogOptionData) GetData() interface{}

func (BacklogOptionData) Len 

func (t BacklogOptionData) Len() uint16

func (BacklogOptionData) Marshal 

func (t BacklogOptionData) Marshal() []byte

func (*BacklogOptionData) SetData 

func (t *BacklogOptionData) SetData(d interface{})

func (*BacklogOptionData) SetUint16 

func (t *BacklogOptionData) SetUint16(b uint16)

type BaseStackOptionData 

type BaseStackOptionData struct {
	ClientLeg bool
	RemoteLeg bool
	Level     StackOptionLevel
	Code      StackOptionCode
	Data      StackOptionData
}

func (BaseStackOptionData) Len 

func (s BaseStackOptionData) Len() uint16

func (BaseStackOptionData) Marshal 

func (s BaseStackOptionData) Marshal() []byte

type CommandCode 

type CommandCode byte

CommandCode is SOCKS 6 request command code. 

const (
	CommandNoop CommandCode = iota
	CommandConnect
	CommandBind
	CommandUDPAssociate
)

type Handshake 

type Handshake struct {
	Methods []byte
}

func ParseHandshake5From 

func ParseHandshake5From(b io.Reader) (*Handshake, error)

func (*Handshake) Marshal5 

func (h *Handshake) Marshal5() []byte

type HappyEyeballOptionData 

type HappyEyeballOptionData struct {
	Availability bool
}

func (HappyEyeballOptionData) GetData 

func (t HappyEyeballOptionData) GetData() interface{}

func (HappyEyeballOptionData) Len 

func (t HappyEyeballOptionData) Len() uint16

func (HappyEyeballOptionData) Marshal 

func (t HappyEyeballOptionData) Marshal() []byte

func (*HappyEyeballOptionData) SetBool 

func (t *HappyEyeballOptionData) SetBool(b bool)

func (*HappyEyeballOptionData) SetData 

func (t *HappyEyeballOptionData) SetData(d interface{})

type IdempotenceAcceptedOptionData 

type IdempotenceAcceptedOptionData struct{}

func (IdempotenceAcceptedOptionData) Marshal 

func (s IdempotenceAcceptedOptionData) Marshal() []byte

type IdempotenceExpenditureOptionData 

type IdempotenceExpenditureOptionData struct {
	Token uint32
}

func (IdempotenceExpenditureOptionData) Marshal 

func (s IdempotenceExpenditureOptionData) Marshal() []byte

type IdempotenceRejectedOptionData 

type IdempotenceRejectedOptionData struct{}

func (IdempotenceRejectedOptionData) Marshal 

func (s IdempotenceRejectedOptionData) Marshal() []byte

type IdempotenceWindowOptionData 

type IdempotenceWindowOptionData struct {
	WindowBase uint32
	WindowSize uint32
}

func (IdempotenceWindowOptionData) Marshal 

func (s IdempotenceWindowOptionData) Marshal() []byte

type MethodSelection 

type MethodSelection struct {
	Method byte
}

func ParseMethodSelection5From 

func ParseMethodSelection5From(b io.Reader) (*MethodSelection, error)

func (*MethodSelection) Marshal5 

func (h *MethodSelection) Marshal5() []byte

type MultipathOptionData 

type MultipathOptionData struct {
	Availability bool
}

func (MultipathOptionData) GetData 

func (t MultipathOptionData) GetData() interface{}

func (MultipathOptionData) Len 

func (t MultipathOptionData) Len() uint16

func (MultipathOptionData) Marshal 

func (t MultipathOptionData) Marshal() []byte

func (*MultipathOptionData) SetBool 

func (t *MultipathOptionData) SetBool(b bool)

func (*MultipathOptionData) SetData 

func (t *MultipathOptionData) SetData(d interface{})

type NoFragmentationOptionData 

type NoFragmentationOptionData struct {
	Availability bool
}

func (NoFragmentationOptionData) GetData 

func (t NoFragmentationOptionData) GetData() interface{}

func (NoFragmentationOptionData) Len 

func (t NoFragmentationOptionData) Len() uint16

func (NoFragmentationOptionData) Marshal 

func (t NoFragmentationOptionData) Marshal() []byte

func (*NoFragmentationOptionData) SetBool 

func (t *NoFragmentationOptionData) SetBool(b bool)

func (*NoFragmentationOptionData) SetData 

func (t *NoFragmentationOptionData) SetData(d interface{})

type OperationReply 

type OperationReply struct {
	ReplyCode ReplyCode
	Endpoint  SocksAddr
	Options   *OptionSet
}

func NewOperationReply 

func NewOperationReply() *OperationReply

func NewOperationReplyWithCode 

func NewOperationReplyWithCode(code ReplyCode) *OperationReply

func ParseOperationReply5From 

func ParseOperationReply5From(b io.Reader) (*OperationReply, error)

func ParseOperationReplyFrom 

func ParseOperationReplyFrom(b io.Reader) (*OperationReply, error)

func (*OperationReply) Marshal 

func (o *OperationReply) Marshal() []byte

func (*OperationReply) Marshal5 

func (o *OperationReply) Marshal5() []byte

type Option 

type Option struct {
	Kind   OptionKind
	Length uint16
	Data   OptionData
}

Option represent a SOCKS6 option.

func GetCombinedStackOptions 

func GetCombinedStackOptions(client StackOptionInfo, remote StackOptionInfo) []Option

func NewAuthenticationDataOption 

func NewAuthenticationDataOption(method byte, data []byte) Option

func NewAuthenticationMethodAdvertisementOption 

func NewAuthenticationMethodAdvertisementOption(methods []byte, dataLen uint16) Option

func NewAuthenticationMethodSelectionOption 

func NewAuthenticationMethodSelectionOption(method byte) Option

func NewBacklogOption 

func NewBacklogOption(backlog uint16) Option

func NewIdempotenceAcceptedOption 

func NewIdempotenceAcceptedOption() Option

func NewIdempotenceExpenditureOption 

func NewIdempotenceExpenditureOption(token uint32) Option

func NewIdempotenceRejectedOption 

func NewIdempotenceRejectedOption() Option

func NewIdempotenceWindowOption 

func NewIdempotenceWindowOption(base, size uint32) Option

func NewPortParityOption 

func NewPortParityOption(parity byte, reserve bool) Option

func NewSessionIDOption 

func NewSessionIDOption(id []byte) Option

func NewSessionInvalidOption 

func NewSessionInvalidOption() Option

func NewSessionOKOption 

func NewSessionOKOption() Option

func NewSessionRequestOption 

func NewSessionRequestOption() Option

func NewSessionTeardownOption 

func NewSessionTeardownOption() Option

func NewTOSOption 

func NewTOSOption(client bool, tos byte) Option

func NewTTLOption 

func NewTTLOption(client bool, ttl byte) Option

func NewTokenRequestOption 

func NewTokenRequestOption(size uint32) Option

func NewUDPErrorOption 

func NewUDPErrorOption(availability bool) Option

func ParseOptionFrom 

func ParseOptionFrom(b io.Reader) (Option, error)

ParseOptionFrom parses b as a SOCKS6 option.

func (*Option) Marshal 

func (o *Option) Marshal() []byte

Marshal return option's binary encoding When encoding, it will always use OptionData provided length, option's Length field is ignored and updated by actual length.

type OptionData 

type OptionData interface {
	Marshal() []byte
}

type OptionKind 

type OptionKind uint16
const (
	OptionKindStack OptionKind
	OptionKindAuthenticationMethodAdvertisement
	OptionKindAuthenticationMethodSelection
	OptionKindAuthenticationData
	OptionKindSessionRequest
	OptionKindSessionID

	OptionKindSessionOK
	OptionKindSessionInvalid
	OptionKindSessionTeardown
	OptionKindTokenRequest
	OptionKindIdempotenceWindow
	OptionKindIdempotenceExpenditure
	OptionKindIdempotenceAccepted
	OptionKindIdempotenceRejected
)
const OptionKindStreamID OptionKind = 0xfd10

type OptionSet 

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

func NewOptionSet 

func NewOptionSet() *OptionSet

func ParseOptionSetFrom 

func ParseOptionSetFrom(b io.Reader, limit int) (*OptionSet, error)

func (*OptionSet) Add 

func (s *OptionSet) Add(o ...Option)

func (*OptionSet) GetData 

func (s *OptionSet) GetData(kind OptionKind) (OptionData, bool)

func (*OptionSet) GetDataF 

func (s *OptionSet) GetDataF(kind OptionKind, fn func(Option) bool) (OptionData, bool)

func (*OptionSet) GetKind 

func (s *OptionSet) GetKind(kind OptionKind) []Option

func (*OptionSet) GetKindF 

func (s *OptionSet) GetKindF(kind OptionKind, fn func(Option) bool) []Option

func (*OptionSet) Len 

func (s *OptionSet) Len() int

func (*OptionSet) Marshal 

func (s *OptionSet) Marshal() []byte

func (OptionSet) String 

func (s OptionSet) String() string

type PortParityOptionData 

type PortParityOptionData struct {
	Parity  byte
	Reserve bool
}

func (PortParityOptionData) GetData 

func (t PortParityOptionData) GetData() interface{}

func (PortParityOptionData) Len 

func (t PortParityOptionData) Len() uint16

func (PortParityOptionData) Marshal 

func (t PortParityOptionData) Marshal() []byte

func (*PortParityOptionData) SetData 

func (t *PortParityOptionData) SetData(d interface{})

type RawOptionData 

type RawOptionData struct {
	Data []byte
}

func (RawOptionData) GetData 

func (r RawOptionData) GetData() interface{}

func (RawOptionData) Len 

func (r RawOptionData) Len() uint16

func (*RawOptionData) Marshal 

func (r *RawOptionData) Marshal() []byte

func (*RawOptionData) SetData 

func (r *RawOptionData) SetData(d interface{})

type ReplyCode 

type ReplyCode byte
const (
	OperationReplySuccess ReplyCode = iota
	OperationReplyServerFailure
	OperationReplyNotAllowedByRule
	OperationReplyNetworkUnreachable
	OperationReplyHostUnreachable
	OperationReplyConnectionRefused
	OperationReplyTTLExpired
	OperationReplyCommandNotSupported
	OperationReplyAddressNotSupported
	OperationReplyTimeout
)

type Request 

type Request struct {
	CommandCode CommandCode
	Endpoint    SocksAddr
	Options     *OptionSet
}

func NewRequest 

func NewRequest() *Request

func ParseRequest5From 

func ParseRequest5From(b io.Reader) (*Request, error)

func ParseRequestFrom 

func ParseRequestFrom(b io.Reader) (*Request, error)

func (*Request) Marshal 

func (r *Request) Marshal() []byte

func (*Request) Marshal5 

func (r *Request) Marshal5() []byte

type SessionIDOptionData 

type SessionIDOptionData struct {
	ID []byte
}

func (SessionIDOptionData) Marshal 

func (s SessionIDOptionData) Marshal() []byte

type SessionInvalidOptionData 

type SessionInvalidOptionData struct{}

func (SessionInvalidOptionData) Marshal 

func (s SessionInvalidOptionData) Marshal() []byte

type SessionOKOptionData 

type SessionOKOptionData struct{}

func (SessionOKOptionData) Marshal 

func (s SessionOKOptionData) Marshal() []byte

type SessionRequestOptionData 

type SessionRequestOptionData struct{}

func (SessionRequestOptionData) Marshal 

func (s SessionRequestOptionData) Marshal() []byte

type SessionTeardownOptionData 

type SessionTeardownOptionData struct{}

func (SessionTeardownOptionData) Marshal 

func (s SessionTeardownOptionData) Marshal() []byte

type SocksAddr 

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

SocksAddr is address and port used in SOCKS6 protocol. 

var AddrIPv4Zero SocksAddr = SocksAddr{
	// contains filtered or unexported fields
}

AddrIPv4Zero is 0.0.0.0:0 in SocksAddr format. 

var AddrIPv6Zero SocksAddr = SocksAddr{
	// contains filtered or unexported fields
}

AddrIPv6Zero is [::]:0 in SocksAddr format. 

var DefaultAddr SocksAddr = AddrIPv4Zero

DefaultAddr is 0.0.0.0:0 in SocksAddr format.

func AddrFromNetIPAddrPort 

func AddrFromNetIPAddrPort(a netip.AddrPort) SocksAddr

func ConvertSocksAddr 

func ConvertSocksAddr(addr net.Addr) SocksAddr

ConvertSocksAddr try to convert net.Addr to SocksAddr.

func MustParseAddr 

func MustParseAddr(addr string) SocksAddr

MustParseAddr parse address string to SocksAddr panic when error.

func ParseAddr 

func ParseAddr(address string) (SocksAddr, error)

ParseAddr parse address string to SocksAddr.

func ParseSocksAddr5From 

func ParseSocksAddr5From(b io.Reader) (SocksAddr, error)

func ParseSocksAddr6From 

func ParseSocksAddr6From(b io.Reader) (address SocksAddr, padding byte, nConsume int, err error)

ParseSocksAddr6FromWithLimit parse socks 6 address with border set to 260 byte.

func ParseSocksAddr6FromWithLimit 

func ParseSocksAddr6FromWithLimit(b io.Reader, limit int) (address SocksAddr, padding byte, nConsume int, err error)

ParseSocksAddr6FromWithLimit parse socks 6 address with border check.

func (SocksAddr) AddrPort 

func (a SocksAddr) AddrPort() netip.AddrPort

func (SocksAddr) AddressType 

func (a SocksAddr) AddressType() AddressType

func (SocksAddr) Domain 

func (a SocksAddr) Domain() string

func (SocksAddr) IP 

func (a SocksAddr) IP() netip.Addr

func (SocksAddr) IsIP 

func (a SocksAddr) IsIP() bool

func (SocksAddr) Marshal5 

func (a SocksAddr) Marshal5() []byte

func (*SocksAddr) Marshal6 

func (a *SocksAddr) Marshal6(pad byte) []byte

Marshal6 serialize to socks 6 wireformat.

func (SocksAddr) Network 

func (a SocksAddr) Network() string

Network implements net.Addr, always return "socks".

func (SocksAddr) Port 

func (a SocksAddr) Port() uint16

func (SocksAddr) String 

func (a SocksAddr) String() string

String implements net.Addr.

type StackOptionCode 

type StackOptionCode byte
const (
	// lv1.
	StackOptionCodeTOS          StackOptionCode = 1
	StackOptionCodeHappyEyeball StackOptionCode = 2
	StackOptionCodeTTL          StackOptionCode = 3
	StackOptionCodeNoFragment   StackOptionCode = 4
	// lv4.
	StackOptionCodeTFO       StackOptionCode = 1
	StackOptionCodeMultipath StackOptionCode = 2
	StackOptionCodeBacklog   StackOptionCode = 3

	StackOptionCodeUDPError   StackOptionCode = 1
	StackOptionCodePortParity StackOptionCode = 2
)

type StackOptionData 

type StackOptionData interface {
	OptionData
	Len() uint16
	GetData() interface{}
	SetData(interface{})
}

type StackOptionInfo 

type StackOptionInfo map[int]interface{}

func GetStackOptionInfo 

func GetStackOptionInfo(ops *OptionSet, clientLeg bool) StackOptionInfo

func (*StackOptionInfo) Add 

func (s *StackOptionInfo) Add(d ...Option)

func (*StackOptionInfo) Combine 

func (s *StackOptionInfo) Combine(s2 StackOptionInfo)

func (StackOptionInfo) Filter 

func (s StackOptionInfo) Filter(s2 StackOptionInfo) StackOptionInfo

func (StackOptionInfo) GetOptions 

func (s StackOptionInfo) GetOptions(clientLeg bool, remoteLeg bool) []Option

type StackOptionLevel 

type StackOptionLevel byte
const (
	StackOptionLevelIP StackOptionLevel
	StackOptionLevelIPv4
	StackOptionLevelIPv6
	StackOptionLevelTCP
	StackOptionLevelUDP
)

type StreamIDOptionData 

type StreamIDOptionData struct {
	ID uint32
}

func (StreamIDOptionData) Marshal 

func (s StreamIDOptionData) Marshal() []byte

type TFOOptionData 

type TFOOptionData struct {
	PayloadSize uint16
}

func (TFOOptionData) GetData 

func (t TFOOptionData) GetData() interface{}

func (TFOOptionData) Len 

func (t TFOOptionData) Len() uint16

func (TFOOptionData) Marshal 

func (t TFOOptionData) Marshal() []byte

func (*TFOOptionData) SetData 

func (t *TFOOptionData) SetData(d interface{})

func (*TFOOptionData) SetUint16 

func (t *TFOOptionData) SetUint16(b uint16)

type TOSOptionData 

type TOSOptionData struct {
	TOS byte
}

func (TOSOptionData) GetData 

func (t TOSOptionData) GetData() interface{}

func (TOSOptionData) Len 

func (t TOSOptionData) Len() uint16

func (TOSOptionData) Marshal 

func (t TOSOptionData) Marshal() []byte

func (*TOSOptionData) SetData 

func (t *TOSOptionData) SetData(d interface{})

func (*TOSOptionData) SetUint8 

func (t *TOSOptionData) SetUint8(b byte)

type TTLOptionData 

type TTLOptionData struct {
	TTL byte
}

func (TTLOptionData) GetData 

func (t TTLOptionData) GetData() interface{}

func (TTLOptionData) Len 

func (t TTLOptionData) Len() uint16

func (TTLOptionData) Marshal 

func (t TTLOptionData) Marshal() []byte

func (*TTLOptionData) SetData 

func (t *TTLOptionData) SetData(d interface{})

func (*TTLOptionData) SetUint8 

func (t *TTLOptionData) SetUint8(b byte)

type TokenRequestOptionData 

type TokenRequestOptionData struct {
	WindowSize uint32
}

func (TokenRequestOptionData) Marshal 

func (s TokenRequestOptionData) Marshal() []byte

type UDPErrorOptionData 

type UDPErrorOptionData struct {
	Availability bool
}

func (UDPErrorOptionData) GetData 

func (t UDPErrorOptionData) GetData() interface{}

func (UDPErrorOptionData) Len 

func (t UDPErrorOptionData) Len() uint16

func (UDPErrorOptionData) Marshal 

func (t UDPErrorOptionData) Marshal() []byte

func (*UDPErrorOptionData) SetBool 

func (t *UDPErrorOptionData) SetBool(b bool)

func (*UDPErrorOptionData) SetData 

func (t *UDPErrorOptionData) SetData(d interface{})

type UDPErrorType 

type UDPErrorType byte
const (
	UDPErrorNetworkUnreachable UDPErrorType
	UDPErrorHostUnreachable
	UDPErrorTTLExpired
	UDPErrorDatagramTooBig
)

type UDPHeaderType 

type UDPHeaderType byte
const (
	UDPMessageAssociationInit UDPHeaderType
	UDPMessageAssociationAck
	UDPMessageDatagram
	UDPMessageError
)

type UDPMessage 

type UDPMessage struct {
	Type          UDPHeaderType
	AssociationID uint64
	// dgram & icmp
	Endpoint SocksAddr
	// icmp
	ErrorEndpoint netip.Addr
	ErrorCode     UDPErrorType
	// dgram
	Data []byte
}

func ParseUDPMessage5From 

func ParseUDPMessage5From(b io.Reader) (*UDPMessage, error)

func ParseUDPMessageFrom 

func ParseUDPMessageFrom(b io.Reader) (*UDPMessage, error)

func (*UDPMessage) Marshal 

func (u *UDPMessage) Marshal() []byte

func (*UDPMessage) Marshal5 

func (u *UDPMessage) Marshal5() []byte

type VersionMismatchError 

type VersionMismatchError struct {
	Version       int
	ConsumedBytes []byte
}

func (VersionMismatchError) Error 

func (e VersionMismatchError) Error() string

func (VersionMismatchError) Is 

func (e VersionMismatchError) Is(e2 error) bool

func (VersionMismatchError) Unwrap 

func (e VersionMismatchError) Unwrap() error

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