gopacket

package module

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Versions in this module

v1

v1.5.0

Nov 2, 2025

v1.4.0

Aug 1, 2025

v1.3.1

Nov 11, 2024

v1.3.0

Aug 24, 2024

v1.2.0

Nov 25, 2023

Changes in this version

+ func ComputeChecksum(data []byte, csum uint32) uint32

+ func FoldChecksum(csum uint32) uint16

+ type ChecksumMismatch struct

+ Layer Layer

+ LayerIndex int

+ type ChecksumVerificationResult struct

+ Actual uint32

+ Correct uint32

+ Valid bool

+ type LayerWithChecksum interface

+ VerifyChecksum func() (error, ChecksumVerificationResult)

type Packet

+ VerifyChecksums func() (error, []ChecksumMismatch)

v1.1.1

Jun 27, 2023

v1.1.0

Mar 25, 2023

Changes in this version

+ var ErrNoLayersAdded = errors.New("NextDecoder called, but no layers added yet")

+ func WithDecodeStreamsAsDatagrams(decodeStreamsAsDatagrams bool) packetSourceOptionFunc

+ func WithLazy(lazy bool) packetSourceOptionFunc

+ func WithNoCopy(noCopy bool) packetSourceOptionFunc

+ func WithPool(pool bool) packetSourceOptionFunc

+ func WithSkipDecodeRecovery(skipDecodeRecovery bool) packetSourceOptionFunc

type DecodeOptions

+ Pool bool

type PacketSource

+ func NewZeroCopyPacketSource(source ZeroCopyPacketDataSource, decoder Decoder, opts ...PacketSourceOption) *PacketSource

+ func (p *PacketSource) PacketsCtx(ctx context.Context) chan Packet

+ type PacketSourceOption interface

+ type PooledPacket interface

+ Dispose func()

v1.0.0

Jan 20, 2023

v0

v0.1.0

Oct 6, 2022

Changes in this version

+ const MaxEndpointSize

+ var DecodeStreamsAsDatagrams = DecodeOptions

+ var DecodersByLayerName = map[string]Decoder

+ var Default = DecodeOptions

+ var EndpointInvalid = RegisterEndpointType(0, EndpointTypeMetadata{ ... })

+ var InvalidEndpoint = NewEndpoint(EndpointInvalid, nil)

+ var InvalidFlow = NewFlow(EndpointInvalid, nil, nil)

+ var LayerTypeDecodeFailure = RegisterLayerType(1, LayerTypeMetadata{ ... })

+ var LayerTypeFragment = RegisterLayerType(3, LayerTypeMetadata{ ... })

+ var LayerTypePayload = RegisterLayerType(2, LayerTypeMetadata{ ... })

+ var LayerTypeZero = RegisterLayerType(0, LayerTypeMetadata{ ... })

+ var Lazy = DecodeOptions

+ var NoCopy = DecodeOptions

+ var TimestampResolutionCaptureInfo = TimestampResolutionNanosecond

+ var TimestampResolutionInvalid = TimestampResolution

+ var TimestampResolutionMicrosecond = TimestampResolution

+ var TimestampResolutionMillisecond = TimestampResolution

+ var TimestampResolutionNTP = TimestampResolution

+ var TimestampResolutionNanosecond = TimestampResolution

+ func LayerDump(l Layer) string

+ func LayerGoString(l Layer) string

+ func LayerString(l Layer) string

+ func LongBytesGoString(buf []byte) string

+ func SerializeLayers(w SerializeBuffer, opts SerializeOptions, layers ...SerializableLayer) error

+ func SerializePacket(buf SerializeBuffer, opts SerializeOptions, packet Packet) error

+ type ApplicationLayer interface

+ Payload func() []byte

+ type CaptureInfo struct

+ AncillaryData []interface{}

+ CaptureLength int

+ InterfaceIndex int

+ Length int

+ Timestamp time.Time

+ type DecodeFailure struct

+ func (d *DecodeFailure) Dump() (s string)

+ func (d *DecodeFailure) Error() error

+ func (d *DecodeFailure) LayerContents() []byte

+ func (d *DecodeFailure) LayerPayload() []byte

+ func (d *DecodeFailure) LayerType() LayerType

+ func (d *DecodeFailure) String() string

+ type DecodeFeedback interface

+ SetTruncated func()

+ var NilDecodeFeedback DecodeFeedback = nilDecodeFeedback{}

+ type DecodeFunc func([]byte, PacketBuilder) error

+ func (d DecodeFunc) Decode(data []byte, p PacketBuilder) error

+ type DecodeOptions struct

+ DecodeStreamsAsDatagrams bool

+ Lazy bool

+ NoCopy bool

+ SkipDecodeRecovery bool

+ type Decoder interface

+ Decode func([]byte, PacketBuilder) error

+ var DecodeFragment Decoder = DecodeFunc(decodeFragment)

+ var DecodePayload Decoder = DecodeFunc(decodePayload)

+ var DecodeUnknown Decoder = DecodeFunc(decodeUnknown)

+ type DecodingLayer interface

+ CanDecode func() LayerClass

+ DecodeFromBytes func(data []byte, df DecodeFeedback) error

+ LayerPayload func() []byte

+ NextLayerType func() LayerType

+ type DecodingLayerArray []decodingLayerElem

+ func (dl DecodingLayerArray) Decoder(typ LayerType) (DecodingLayer, bool)

+ func (dl DecodingLayerArray) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc

+ func (dl DecodingLayerArray) Put(d DecodingLayer) DecodingLayerContainer

+ type DecodingLayerContainer interface

+ Decoder func(LayerType) (DecodingLayer, bool)

+ LayersDecoder func(first LayerType, df DecodeFeedback) DecodingLayerFunc

+ Put func(DecodingLayer) DecodingLayerContainer

+ type DecodingLayerFunc func([]byte, *[]LayerType) (LayerType, error)

+ func LayersDecoder(dl DecodingLayerContainer, first LayerType, df DecodeFeedback) DecodingLayerFunc

+ type DecodingLayerMap map[LayerType]DecodingLayer

+ func (dl DecodingLayerMap) Decoder(typ LayerType) (DecodingLayer, bool)

+ func (dl DecodingLayerMap) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc

+ func (dl DecodingLayerMap) Put(d DecodingLayer) DecodingLayerContainer

+ type DecodingLayerParser struct

+ Truncated bool

+ func NewDecodingLayerParser(first LayerType, decoders ...DecodingLayer) *DecodingLayerParser

+ func (l *DecodingLayerParser) AddDecodingLayer(d DecodingLayer)

+ func (l *DecodingLayerParser) DecodeLayers(data []byte, decoded *[]LayerType) (err error)

+ func (l *DecodingLayerParser) SetDecodingLayerContainer(dlc DecodingLayerContainer)

+ func (l *DecodingLayerParser) SetTruncated()

+ type DecodingLayerParserOptions struct

+ IgnorePanic bool

+ IgnoreUnsupported bool

+ type DecodingLayerSparse []DecodingLayer

+ func (dl DecodingLayerSparse) Decoder(typ LayerType) (DecodingLayer, bool)

+ func (dl DecodingLayerSparse) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc

+ func (dl DecodingLayerSparse) Put(d DecodingLayer) DecodingLayerContainer

+ type Dumper interface

+ Dump func() string

+ type Endpoint struct

+ func NewEndpoint(typ EndpointType, raw []byte) (e Endpoint)

+ func (a Endpoint) EndpointType() EndpointType

+ func (a Endpoint) FastHash() (h uint64)

+ func (a Endpoint) LessThan(b Endpoint) bool

+ func (a Endpoint) Raw() []byte

+ func (a Endpoint) String() string

+ type EndpointType int64

+ func RegisterEndpointType(num int, meta EndpointTypeMetadata) EndpointType

+ func (e EndpointType) String() string

+ type EndpointTypeMetadata struct

+ Formatter func([]byte) string

+ Name string

+ type ErrorLayer interface

+ Error func() error

+ type Flow struct

+ func FlowFromEndpoints(src, dst Endpoint) (_ Flow, err error)

+ func NewFlow(t EndpointType, src, dst []byte) (f Flow)

+ func (f Flow) Dst() (dst Endpoint)

+ func (f Flow) EndpointType() EndpointType

+ func (f Flow) Endpoints() (src, dst Endpoint)

+ func (f Flow) FastHash() (h uint64)

+ func (f Flow) Reverse() Flow

+ func (f Flow) Src() (src Endpoint)

+ func (f Flow) String() string

+ type Fragment []byte

+ func (p *Fragment) CanDecode() LayerClass

+ func (p *Fragment) DecodeFromBytes(data []byte, df DecodeFeedback) error

+ func (p *Fragment) LayerContents() []byte

+ func (p *Fragment) LayerPayload() []byte

+ func (p *Fragment) LayerType() LayerType

+ func (p *Fragment) NextLayerType() LayerType

+ func (p *Fragment) Payload() []byte

+ func (p *Fragment) SerializeTo(b SerializeBuffer, opts SerializeOptions) error

+ func (p *Fragment) String() string

+ type Layer interface

+ LayerContents func() []byte

+ LayerPayload func() []byte

+ LayerType func() LayerType

+ type LayerClass interface

+ Contains func(LayerType) bool

+ LayerTypes func() []LayerType

+ func NewLayerClass(types []LayerType) LayerClass

+ type LayerClassMap map[LayerType]bool

+ func NewLayerClassMap(types []LayerType) LayerClassMap

+ func (m LayerClassMap) Contains(t LayerType) bool

+ func (m LayerClassMap) LayerTypes() (all []LayerType)

+ type LayerClassSlice []bool

+ func NewLayerClassSlice(types []LayerType) LayerClassSlice

+ func (s LayerClassSlice) Contains(t LayerType) bool

+ func (s LayerClassSlice) LayerTypes() (all []LayerType)

+ type LayerType int64

+ func OverrideLayerType(num int, meta LayerTypeMetadata) LayerType

+ func RegisterLayerType(num int, meta LayerTypeMetadata) LayerType

+ func (l LayerType) Contains(a LayerType) bool

+ func (l LayerType) LayerTypes() []LayerType

+ func (t LayerType) Decode(data []byte, c PacketBuilder) error

+ func (t LayerType) String() (s string)

+ type LayerTypeMetadata struct

+ Decoder Decoder

+ Name string

+ type LinkLayer interface

+ LinkFlow func() Flow

+ type NetworkLayer interface

+ NetworkFlow func() Flow

+ type Packet interface

+ ApplicationLayer func() ApplicationLayer

+ Data func() []byte

+ Dump func() string

+ ErrorLayer func() ErrorLayer

+ Layer func(LayerType) Layer

+ LayerClass func(LayerClass) Layer

+ Layers func() []Layer

+ LinkLayer func() LinkLayer

+ Metadata func() *PacketMetadata

+ NetworkLayer func() NetworkLayer

+ String func() string

+ TransportLayer func() TransportLayer

+ func NewPacket(data []byte, firstLayerDecoder Decoder, options DecodeOptions) Packet

+ type PacketBuilder interface

+ AddLayer func(l Layer)

+ DecodeOptions func() *DecodeOptions

+ DumpPacketData func()

+ NextDecoder func(next Decoder) error

+ SetApplicationLayer func(ApplicationLayer)

+ SetErrorLayer func(ErrorLayer)

+ SetLinkLayer func(LinkLayer)

+ SetNetworkLayer func(NetworkLayer)

+ SetTransportLayer func(TransportLayer)

+ type PacketDataSource interface

+ ReadPacketData func() (data []byte, ci CaptureInfo, err error)

+ func ConcatFinitePacketDataSources(pds ...PacketDataSource) PacketDataSource

+ type PacketMetadata struct

+ Truncated bool

+ type PacketSource struct

+ func NewPacketSource(source PacketDataSource, decoder Decoder) *PacketSource

+ func (p *PacketSource) NextPacket() (Packet, error)

+ func (p *PacketSource) Packets() chan Packet

+ type PacketSourceResolution interface

+ Resolution func() TimestampResolution

+ type Payload []byte

+ func (p *Payload) DecodeFromBytes(data []byte, df DecodeFeedback) error

+ func (p Payload) CanDecode() LayerClass

+ func (p Payload) GoString() string

+ func (p Payload) LayerContents() []byte

+ func (p Payload) LayerPayload() []byte

+ func (p Payload) LayerType() LayerType

+ func (p Payload) NextLayerType() LayerType

+ func (p Payload) Payload() []byte

+ func (p Payload) SerializeTo(b SerializeBuffer, opts SerializeOptions) error

+ func (p Payload) String() string

+ type SerializableLayer interface

+ LayerType func() LayerType

+ SerializeTo func(b SerializeBuffer, opts SerializeOptions) error

+ type SerializeBuffer interface

+ AppendBytes func(num int) ([]byte, error)

+ Bytes func() []byte

+ Clear func() error

+ Layers func() []LayerType

+ PrependBytes func(num int) ([]byte, error)

+ PushLayer func(LayerType)

+ func NewSerializeBuffer() SerializeBuffer

+ func NewSerializeBufferExpectedSize(expectedPrependLength, expectedAppendLength int) SerializeBuffer

+ type SerializeOptions struct

+ ComputeChecksums bool

+ FixLengths bool

+ type TimestampResolution struct

+ Base int

+ Exponent int

+ func (t TimestampResolution) String() string

+ func (t TimestampResolution) ToDuration() time.Duration

+ type TransportLayer interface

+ TransportFlow func() Flow

+ type UnsupportedLayerType LayerType

+ func (e UnsupportedLayerType) Error() string

+ type ZeroCopyPacketDataSource interface

+ ZeroCopyReadPacketData func() (data []byte, ci CaptureInfo, err error)

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