layers

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Versions in this module

v0

v0.0.17

Sep 30, 2025

v0.0.16

Sep 24, 2025

v0.0.14

Aug 12, 2025

Changes in this version

+ var ErrParsingAddress = fmt.Errorf("failed parsing IP address")

+ var ErrSliceBounds = fmt.Errorf("slice bounds out of range")

+ var Layers = []LayerName

+ func GenerateRandomBytes(n int) ([]byte, error)

+ func GenerateRandomUint16BE() (uint16, error)

+ func GenerateRandomUint16LE() (uint16, error)

+ func GenerateRandomUint16NE() (uint16, error)

+ func MustGenerateRandomUint16NE() uint16

type ARPPacket

+ func (ap *ARPPacket) Name() LayerName

type DNSMessage

+ func (d *DNSMessage) MarshalJSON() ([]byte, error)

+ func (d *DNSMessage) Name() LayerName

+ func (d *DNSMessage) UnmarshalBinary(data []byte) error

type EthernetFrame

+ func (ef *EthernetFrame) Name() LayerName

type FTPMessage

+ func (f *FTPMessage) Name() LayerName

type HTTPMessage

+ func (h *HTTPMessage) Name() LayerName

type ICMPSegment

+ func (i *ICMPSegment) Name() LayerName

type ICMPv6Segment

+ func (i *ICMPv6Segment) Name() LayerName

type IPv4Packet

+ func (p *IPv4Packet) Name() LayerName

+ func (p *IPv4Packet) SetPayload(payload []byte)

type IPv6Packet

+ Payload []byte

+ func (p *IPv6Packet) Name() LayerName

type Layer

+ func GetLayer(layer LayerName) Layer

+ func ParseNextLayer(data []byte, src, dst *uint16) Layer

+ Name func() LayerName

+ type LayerName string

+ const LayerARP

+ const LayerDNS

+ const LayerETH

+ const LayerFTP

+ const LayerHTTP

+ const LayerICMP

+ const LayerICMPv6

+ const LayerIPv4

+ const LayerIPv6

+ const LayerSNMP

+ const LayerSSH

+ const LayerTCP

+ const LayerTLS

+ const LayerUDP

type RDataHTTPS

+ Length int

+ SvcParams []*SvcParam

+ SvcPriority uint16

+ TargetName string

type ResourceRecord

+ func (rt *ResourceRecord) Summary() string

type SNMPMessage

+ func (s *SNMPMessage) Name() LayerName

type SSHMessage

+ func (s *SSHMessage) Name() LayerName

+ type SvcParam struct

+ Key *SvcParamKey

+ Length uint16

+ Value []byte

+ func (sp *SvcParam) String() string

+ type SvcParamKey struct

+ Desc string

+ Val uint16

+ func (spk *SvcParamKey) String() string

type TCPSegment

+ Payload []byte

+ func (t *TCPSegment) Name() LayerName

type TLSMessage

+ func (t *TLSMessage) Name() LayerName

type UDPSegment

+ func (u *UDPSegment) Name() LayerName

+ func (u *UDPSegment) SetChecksum(pseudo []byte) error

v0.0.12

Aug 4, 2025

v0.0.11

Aug 4, 2025

v0.0.10

Jul 30, 2025

v0.0.9

Jul 26, 2025

Changes in this version

+ func CalculateIPv4Checksum(data []byte) (uint16, error)

+ func CalculateUDPChecksum(data []byte) (uint16, error)

+ type IPProto uint8

+ const ProtoICMP

+ const ProtoTCP

+ const ProtoUDP

type IPv4Flags

+ Raw uint8

+ func NewIPv4Flags(flags uint8) *IPv4Flags

type IPv4Packet

+ Payload []byte

+ func NewIPv4Packet(srcIP, dstIP netip.Addr, proto IPProto, payload []byte) (*IPv4Packet, error)

+ func (p *IPv4Packet) MarshalBinary() ([]byte, error)

+ func (p *IPv4Packet) PseudoHeader() *IPv4PseudoHeader

+ func (p *IPv4Packet) ToBytes() []byte

+ func (p *IPv4Packet) UnmarshalBinary(data []byte) error

+ type IPv4Proto struct

+ Desc string

+ Val IPProto

+ func (p *IPv4Proto) String() string

+ type IPv4PseudoHeader struct

+ DstIP netip.Addr

+ Protocol *IPv4Proto

+ SrcIP netip.Addr

+ TotalLength uint16

+ func (ph *IPv4PseudoHeader) MarshalBinary() ([]byte, error)

+ func (ph *IPv4PseudoHeader) ToBytes() []byte

type UDPSegment

+ Payload []byte

+ func NewUDPSegment(srcPort, dstPort uint16, payload []byte, pseudo *[]byte) (*UDPSegment, error)

+ func (u *UDPSegment) MarshalBinary() ([]byte, error)

+ func (u *UDPSegment) ToBytes() []byte

+ func (u *UDPSegment) UnmarshalBinary(data []byte) error

v0.0.8

Jul 22, 2025

v0.0.7

Jul 21, 2025

v0.0.6

Jul 12, 2025

Changes in this version

+ var ErrTLSTooShort = fmt.Errorf("tls message too short")

+ type ARPOperation struct

+ Desc string

+ Val Operation

+ func (ao *ARPOperation) String() string

type ARPPacket

+ DstVendor string

+ SrcVendor string

+ func NewARPPacket(op Operation, senderMAC net.HardwareAddr, senderIP netip.Addr, ...) (*ARPPacket, error)

+ func (ap *ARPPacket) MarshalBinary() ([]byte, error)

+ func (ap *ARPPacket) ToBytes() []byte

+ func (ap *ARPPacket) UnmarshalBinary(data []byte) error

+ type EtherType uint16

+ const EtherTypeARP

+ const EtherTypeIPv4

+ const EtherTypeIPv6

type EthernetFrame

+ DstVendor string

+ Payload []byte

+ SrcVendor string

+ func NewEthernetFrame(dstMAC, srcMAC net.HardwareAddr, et EtherType, payload []byte) (*EthernetFrame, error)

+ func (ef *EthernetFrame) MarshalBinary() ([]byte, error)

+ func (ef *EthernetFrame) ToBytes() []byte

+ func (ef *EthernetFrame) UnmarshalBinary(data []byte) error

+ type EthernetType struct

+ Desc string

+ Val EtherType

+ func (et *EthernetType) String() string

+ type Operation uint16

+ const OperationReply

+ const OperationRequest

+ type TCPFlag struct

+ Desc string

+ Val uint8

type TCPFlags

+ Val []*TCPFlag

type TLSVersion

+ Val uint16

v0.0.5

Jul 6, 2025

Changes in this version

+ var TLSTooShortErr = fmt.Errorf("tls message too short")

v0.0.4

Jun 17, 2025

Changes in this version

type HTTPMessage

+ func (h *HTTPMessage) MarshalJSON() ([]byte, error)

+ type HTTPRequest struct

+ ContentLength int

+ Header http.Header

+ Host string

+ Method string

+ Proto string

+ URI string

+ type HTTPRequestWrapper struct

+ Request HTTPRequest

+ type HTTPResponse struct

+ ContentLength int

+ Header http.Header

+ Proto string

+ Status string

+ type HTTPResponseWrapper struct

+ Response HTTPResponse

type TLSClientHello

+ func (tch *TLSClientHello) MarshalJSON() ([]byte, error)

+ type TLSClientHelloRequest struct

+ ALPN []string

+ CipherSuites []string

+ Extensions []string

+ SNI string

+ SessionID string

+ Type string

+ Version string

+ type TLSClientHelloRequestWrapper struct

+ Request TLSClientHelloRequest

type TLSServerHello

+ func (tsh *TLSServerHello) MarshalJSON() ([]byte, error)

+ type TLSServerHelloResponse struct

+ CipherSuite string

+ Extensions []string

+ SessionID string

+ SupportedVersion string

+ Type string

+ Version string

+ type TLSServerHelloResponseWrapper struct

+ Response TLSServerHelloResponse

v0.0.3

Jun 16, 2025

Changes in this version

+ const ClientHelloTLSVal

+ const HandshakeTLSVal

+ const ServerHelloTLSVal

+ type CipherSuite struct

+ Desc string

+ Value uint16

+ func (cs *CipherSuite) String() string

+ type Extension struct

+ Desc string

+ Value uint16

+ func (e *Extension) String() string

+ type HSTLSParser interface

+ ParseHS func(data []byte) error

+ func HSTLSParserByType(hstype uint8) HSTLSParser

type HTTPMessage

+ Request *http.Request

+ Response *http.Response

+ func (h *HTTPMessage) IsEmpty() bool

type Record

+ Data []byte

+ type ServerName struct

+ Length uint16

+ SNListLength uint16

+ SNName string

+ SNNameLength uint16

+ SNType uint8

+ Type uint16

+ func (sn *ServerName) Parse(data []byte) error

+ func (sn *ServerName) String() string

+ type TLSClientHello struct

+ ALPN []string

+ CipherSuites []*CipherSuite

+ CipherSuitesLength uint16

+ CmprMethods []byte

+ CmprMethodsLength uint8

+ ExtensionLength uint16

+ Extensions []*Extension

+ Length int

+ Random []byte

+ ServerName *ServerName

+ SessionID string

+ SessionIDLength uint8

+ Type uint8

+ TypeDesc string

+ Version *TLSVersion

+ func (tch *TLSClientHello) ParseHS(data []byte) error

+ func (tch *TLSClientHello) String() string

+ type TLSServerHello struct

+ CipherSuite *CipherSuite

+ CmprMethod uint8

+ ExtensionLength uint16

+ Extensions []*Extension

+ Length int

+ Random []byte

+ SessionID string

+ SessionIDLength uint8

+ SupportedVersion *TLSVersion

+ Type uint8

+ TypeDesc string

+ Version *TLSVersion

+ func (tsh *TLSServerHello) ParseHS(data []byte) error

+ func (tsh *TLSServerHello) String() string

+ type TLSVersion struct

+ Desc string

+ Value uint16

+ func (tv *TLSVersion) String() string

v0.0.2

Sep 18, 2024

v0.0.1

Sep 17, 2024

Changes in this version

+ var LayerMap = map[string]Layer

+ type ARPPacket struct

+ HardwareType uint16

+ Hlen uint8

+ Op uint16

+ OpDesc string

+ Plen uint8

+ ProtocolType uint16

+ ProtocolTypeDesc string

+ SenderIP netip.Addr

+ SenderMAC net.HardwareAddr

+ TargetIP netip.Addr

+ TargetMAC net.HardwareAddr

+ func (ap *ARPPacket) NextLayer() (layer string, payload []byte)

+ func (ap *ARPPacket) Parse(data []byte) error

+ func (ap *ARPPacket) String() string

+ func (ap *ARPPacket) Summary() string

+ type DNSFlags struct

+ AA uint8

+ AU uint8

+ NA uint8

+ OPCode uint8

+ OPCodeDesc string

+ QR uint8

+ QRDesc string

+ RA uint8

+ RCode uint8

+ RCodeDesc string

+ RD uint8

+ Raw uint16

+ TC uint8

+ Z uint8

+ func (df *DNSFlags) String() string

+ type DNSMessage struct

+ ANCount uint16

+ ARCount uint16

+ AdditionalRRs []*ResourceRecord

+ AnswerRRs []*ResourceRecord

+ AuthorityRRs []*ResourceRecord

+ Flags *DNSFlags

+ NSCount uint16

+ QDCount uint16

+ Questions []*QueryEntry

+ TransactionID uint16

+ func (d *DNSMessage) NextLayer() (layer string, payload []byte)

+ func (d *DNSMessage) Parse(data []byte) error

+ func (d *DNSMessage) String() string

+ func (d *DNSMessage) Summary() string

+ type EthernetFrame struct

+ DstMAC net.HardwareAddr

+ EtherType uint16

+ EtherTypeDesc string

+ SrcMAC net.HardwareAddr

+ func (ef *EthernetFrame) NextLayer() (string, []byte)

+ func (ef *EthernetFrame) Parse(data []byte) error

+ func (ef *EthernetFrame) String() string

+ func (ef *EthernetFrame) Summary() string

+ type FTPMessage struct

+ func (f *FTPMessage) NextLayer() (layer string, payload []byte)

+ func (f *FTPMessage) Parse(data []byte) error

+ func (f *FTPMessage) String() string

+ func (f *FTPMessage) Summary() string

+ type HTTPMessage struct

+ func (h *HTTPMessage) NextLayer() (layer string, payload []byte)

+ func (h *HTTPMessage) Parse(data []byte) error

+ func (h *HTTPMessage) String() string

+ func (h *HTTPMessage) Summary() string

+ type ICMPSegment struct

+ Checksum uint16

+ Code uint8

+ CodeDesc string

+ Data []byte

+ Type uint8

+ TypeDesc string

+ func (i *ICMPSegment) NextLayer() (layer string, payload []byte)

+ func (i *ICMPSegment) Parse(data []byte) error

+ func (i *ICMPSegment) String() string

+ func (i *ICMPSegment) Summary() string

+ type ICMPv6Segment struct

+ Checksum uint16

+ Code uint8

+ CodeDesc string

+ Data []byte

+ Type uint8

+ TypeDesc string

+ func (i *ICMPv6Segment) NextLayer() (layer string, payload []byte)

+ func (i *ICMPv6Segment) Parse(data []byte) error

+ func (i *ICMPv6Segment) String() string

+ func (i *ICMPv6Segment) Summary() string

+ type IPv4Flags struct

+ DF uint8

+ MF uint8

+ Reserved uint8

+ func (i *IPv4Flags) String() string

+ type IPv4Packet struct

+ DSCP uint8

+ DSCPDesc string

+ DstIP netip.Addr

+ ECN uint8

+ Flags *IPv4Flags

+ FragmentOffset uint16

+ HeaderChecksum uint16

+ IHL uint8

+ Identification uint16

+ Options []byte

+ Protocol uint8

+ ProtocolDesc string

+ SrcIP netip.Addr

+ TTL uint8

+ TotalLength uint16

+ Version uint8

+ func (p *IPv4Packet) NextLayer() (string, []byte)

+ func (p *IPv4Packet) Parse(data []byte) error

+ func (p *IPv4Packet) String() string

+ func (p *IPv4Packet) Summary() string

+ type IPv6Packet struct

+ DstIP netip.Addr

+ FlowLabel uint32

+ HopLimit uint8

+ NextHeader uint8

+ NextHeaderDesc string

+ PayloadLength uint16

+ SrcIP netip.Addr

+ TrafficClass *TrafficClass

+ Version uint8

+ func (p *IPv6Packet) NextLayer() (string, []byte)

+ func (p *IPv6Packet) Parse(data []byte) error

+ func (p *IPv6Packet) String() string

+ func (p *IPv6Packet) Summary() string

+ type Layer interface

+ NextLayer func() (layer string, payload []byte)

+ Parse func(data []byte) error

+ Summary func() string

+ type Message struct

+ MesssageType uint8

+ MesssageTypeDesc string

+ PacketLength uint32

+ PaddingLength uint8

+ Payload []byte

+ func (m *Message) String() string

+ type QueryEntry struct

+ Class *RecordClass

+ Name string

+ Type *RecordType

+ func (qe *QueryEntry) String() string

+ type RDataA struct

+ Address netip.Addr

+ func (d *RDataA) String() string

+ type RDataAAAA struct

+ Address netip.Addr

+ func (d *RDataAAAA) String() string

+ type RDataCNAME struct

+ CName string

+ func (d *RDataCNAME) String() string

+ type RDataHTTPS struct

+ Data string

+ func (d *RDataHTTPS) String() string

+ type RDataMX struct

+ Exchange string

+ Preference uint16

+ func (d *RDataMX) String() string

+ type RDataNS struct

+ NsdName string

+ func (d *RDataNS) String() string

+ type RDataOPT struct

+ DataLen uint16

+ EDNSVer uint8

+ HigherBitsExtRCode uint8

+ UDPPayloadSize uint16

+ Z uint16

+ func (d *RDataOPT) String() string

+ type RDataSOA struct

+ ExpireLimit uint32

+ MinimumTTL uint32

+ PrimaryNS string

+ RefreshInterval uint32

+ RespAuthorityMailbox string

+ RetryInterval uint32

+ SerialNumber uint32

+ func (d *RDataSOA) String() string

+ type RDataTXT struct

+ TxtData string

+ func (d *RDataTXT) String() string

+ type RDataUnknown struct

+ Data string

+ func (d *RDataUnknown) String() string

+ type Record struct

+ ContentType uint8

+ ContentTypeDesc string

+ Length uint16

+ Version uint16

+ VersionDesc string

+ func (r *Record) String() string

+ type RecordClass struct

+ Name string

+ Val uint16

+ func (c *RecordClass) String() string

+ type RecordType struct

+ Name string

+ Val uint16

+ func (rt *RecordType) String() string

+ type ResourceRecord struct

+ Class *RecordClass

+ Name string

+ RDLength uint16

+ RData fmt.Stringer

+ TTL uint32

+ Type *RecordType

+ func (rt *ResourceRecord) String() string

+ type SNMPMessage struct

+ Payload []byte

+ func (s *SNMPMessage) NextLayer() (layer string, payload []byte)

+ func (s *SNMPMessage) Parse(data []byte) error

+ func (s *SNMPMessage) String() string

+ func (s *SNMPMessage) Summary() string

+ type SSHMessage struct

+ Messages []*Message

+ Protocol string

+ func (s *SSHMessage) NextLayer() (layer string, payload []byte)

+ func (s *SSHMessage) Parse(data []byte) error

+ func (s *SSHMessage) String() string

+ func (s *SSHMessage) Summary() string

+ type TCPFlags struct

+ ACK uint8

+ CWR uint8

+ ECE uint8

+ FIN uint8

+ PSH uint8

+ RST uint8

+ Raw uint8

+ SYN uint8

+ URG uint8

+ func (t *TCPFlags) String() string

+ type TCPSegment struct

+ AckNumber uint32

+ Checksum uint16

+ DataOffset uint8

+ DstPort uint16

+ Flags *TCPFlags

+ Options []byte

+ Reserved uint8

+ SeqNumber uint32

+ SrcPort uint16

+ UrgentPointer uint16

+ WindowSize uint16

+ func (t *TCPSegment) NextLayer() (string, []byte)

+ func (t *TCPSegment) Parse(data []byte) error

+ func (t *TCPSegment) String() string

+ func (t *TCPSegment) Summary() string

+ type TLSMessage struct

+ Data []byte

+ Records []*Record

+ func (t *TLSMessage) NextLayer() (layer string, payload []byte)

+ func (t *TLSMessage) Parse(data []byte) error

+ func (t *TLSMessage) String() string

+ func (t *TLSMessage) Summary() string

+ type TrafficClass struct

+ DSCP uint8

+ DSCPDesc string

+ ECN uint8

+ Raw uint8

+ func (p *TrafficClass) String() string

+ type UDPSegment struct

+ Checksum uint16

+ DstPort uint16

+ SrcPort uint16

+ UDPLength uint16

+ func (u *UDPSegment) NextLayer() (string, []byte)

+ func (u *UDPSegment) Parse(data []byte) error

+ func (u *UDPSegment) String() string

+ func (u *UDPSegment) Summary() string

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