wire

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 Go to latest Published: Apr 21, 2024 License: MIT Imports: 19 Imported by: 0

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Constants

This section is empty.

Variables

View Source 
var AdditionalTransportParametersClient map[uint64][]byte

AdditionalTransportParametersClient are additional transport parameters that will be added to the client's transport parameters. This is not intended for production use, but _only_ to increase the size of the ClientHello beyond the usual size of less than 1 MTU.

View Source 
var ErrInvalidReservedBits = errors.New("invalid reserved bits")

ErrInvalidReservedBits is returned when the reserved bits are incorrect. When this error is returned, parsing continues, and an ExtendedHeader is returned. This is necessary because we need to decrypt the packet in that case, in order to avoid a timing side-channel.

View Source 
var ErrUnsupportedVersion = errors.New("unsupported version")
View Source 
var MaxDatagramSize protocol.ByteCount = 16383

MaxDatagramSize is the maximum size of a DATAGRAM frame (RFC 9221). By setting it to a large value, we allow all datagrams that fit into a QUIC packet. The value is chosen such that it can still be encoded as a 2 byte varint. This is a var and not a const so it can be set in tests.

Functions

func AppendShortHeader 

func AppendShortHeader(b []byte, connID protocol.ConnectionID, pn protocol.PacketNumber, pnLen protocol.PacketNumberLen, kp protocol.KeyPhaseBit) ([]byte, error)

AppendShortHeader writes a short header.

func ComposeVersionNegotiation 

func ComposeVersionNegotiation(destConnID, srcConnID protocol.ArbitraryLenConnectionID, versions []protocol.Version) []byte

ComposeVersionNegotiation composes a Version Negotiation

func Is0RTTPacket 

func Is0RTTPacket(b []byte) bool

Is0RTTPacket says if this is a 0-RTT packet. A packet sent with a version we don't understand can never be a 0-RTT packet.

func IsLongHeaderPacket 

func IsLongHeaderPacket(firstByte byte) bool

IsLongHeaderPacket says if this is a Long Header packet

func IsPotentialQUICPacket 

func IsPotentialQUICPacket(firstByte byte) bool

func IsVersionNegotiationPacket 

func IsVersionNegotiationPacket(b []byte) bool

IsVersionNegotiationPacket says if this is a version negotiation packet

func LogFrame 

func LogFrame(logger utils.Logger, frame Frame, sent bool)

LogFrame logs a frame, either sent or received

func LogShortHeader 

func LogShortHeader(logger utils.Logger, dest protocol.ConnectionID, pn protocol.PacketNumber, pnLen protocol.PacketNumberLen, kp protocol.KeyPhaseBit)

func ParseArbitraryLenConnectionIDs 

func ParseArbitraryLenConnectionIDs(data []byte) (bytesParsed int, dest, src protocol.ArbitraryLenConnectionID, _ error)

ParseArbitraryLenConnectionIDs parses the most general form of a Long Header packet, using only the version-independent packet format as described in Section 5.1 of RFC 8999: https://datatracker.ietf.org/doc/html/rfc8999#section-5.1. This function should only be called on Long Header packets for which we don't support the version.

func ParseConnectionID 

func ParseConnectionID(data []byte, shortHeaderConnIDLen int) (protocol.ConnectionID, error)

ParseConnectionID parses the destination connection ID of a packet.

func ParseShortHeader 

func ParseShortHeader(data []byte, connIDLen int) (length int, _ protocol.PacketNumber, _ protocol.PacketNumberLen, _ protocol.KeyPhaseBit, _ error)

ParseShortHeader parses a short header packet. It must be called after header protection was removed. Otherwise, the check for the reserved bits will (most likely) fail.

func ParseVersion 

func ParseVersion(data []byte) (protocol.Version, error)

ParseVersion parses the QUIC version. It should only be called for Long Header packets (Short Header packets don't contain a version number).

func ParseVersionNegotiationPacket 

func ParseVersionNegotiationPacket(b []byte) (dest, src protocol.ArbitraryLenConnectionID, _ []protocol.Version, _ error)

ParseVersionNegotiationPacket parses a Version Negotiation packet.

func ShortHeaderLen 

func ShortHeaderLen(dest protocol.ConnectionID, pnLen protocol.PacketNumberLen) protocol.ByteCount

Types

type AckFrame 

type AckFrame struct {
	AckRanges []AckRange // has to be ordered. The highest ACK range goes first, the lowest ACK range goes last
	DelayTime time.Duration

	ECT0, ECT1, ECNCE uint64
}

An AckFrame is an ACK frame

func (*AckFrame) AcksPacket 

func (f *AckFrame) AcksPacket(p protocol.PacketNumber) bool

AcksPacket determines if this ACK frame acks a certain packet number

func (*AckFrame) Append 

func (f *AckFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

Append appends an ACK frame.

func (*AckFrame) HasMissingRanges 

func (f *AckFrame) HasMissingRanges() bool

HasMissingRanges returns if this frame reports any missing packets

func (*AckFrame) LargestAcked 

func (f *AckFrame) LargestAcked() protocol.PacketNumber

LargestAcked is the largest acked packet number

func (*AckFrame) Length 

func (f *AckFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

func (*AckFrame) LowestAcked 

func (f *AckFrame) LowestAcked() protocol.PacketNumber

LowestAcked is the lowest acked packet number

func (*AckFrame) Reset 

func (f *AckFrame) Reset()

func (*AckFrame) UpdateAckRanges 

func (f *AckFrame) UpdateAckRanges(conn packet_setting.QuicConnection)

BPF_MAP_TAG

type AckRange 

type AckRange struct {
	Smallest protocol.PacketNumber
	Largest  protocol.PacketNumber
}

AckRange is an ACK range

func (AckRange) Len 

func (r AckRange) Len() protocol.PacketNumber

Len returns the number of packets contained in this ACK range

type ConnectionCloseFrame 

type ConnectionCloseFrame struct {
	IsApplicationError bool
	ErrorCode          uint64
	FrameType          uint64
	ReasonPhrase       string
}

A ConnectionCloseFrame is a CONNECTION_CLOSE frame

func (*ConnectionCloseFrame) Append 

func (f *ConnectionCloseFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*ConnectionCloseFrame) Length 

func (f *ConnectionCloseFrame) Length(protocol.Version) protocol.ByteCount

Length of a written frame

type CryptoFrame 

type CryptoFrame struct {
	Offset protocol.ByteCount
	Data   []byte
}

A CryptoFrame is a CRYPTO frame

func (*CryptoFrame) Append 

func (f *CryptoFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*CryptoFrame) Length 

func (f *CryptoFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

func (*CryptoFrame) MaxDataLen 

func (f *CryptoFrame) MaxDataLen(maxSize protocol.ByteCount) protocol.ByteCount

MaxDataLen returns the maximum data length

func (*CryptoFrame) MaybeSplitOffFrame 

func (f *CryptoFrame) MaybeSplitOffFrame(maxSize protocol.ByteCount, version protocol.Version) (*CryptoFrame, bool)

MaybeSplitOffFrame splits a frame such that it is not bigger than n bytes. It returns if the frame was actually split. The frame might not be split if: * the size is large enough to fit the whole frame * the size is too small to fit even a 1-byte frame. In that case, the frame returned is nil.

type DataBlockedFrame 

type DataBlockedFrame struct {
	MaximumData protocol.ByteCount
}

A DataBlockedFrame is a DATA_BLOCKED frame

func (*DataBlockedFrame) Append 

func (f *DataBlockedFrame) Append(b []byte, version protocol.Version) ([]byte, error)

func (*DataBlockedFrame) Length 

func (f *DataBlockedFrame) Length(version protocol.Version) protocol.ByteCount

Length of a written frame

type DatagramFrame 

type DatagramFrame struct {
	DataLenPresent bool
	Data           []byte

	// DATAGRAM_PRIO_TAG
	Priority priority_setting.Priority
}

A DatagramFrame is a DATAGRAM frame

func (*DatagramFrame) Append 

func (f *DatagramFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*DatagramFrame) Length 

func (f *DatagramFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

func (*DatagramFrame) MaxDataLen 

func (f *DatagramFrame) MaxDataLen(maxSize protocol.ByteCount, version protocol.Version) protocol.ByteCount

MaxDataLen returns the maximum data length

type ExtendedHeader 

type ExtendedHeader struct {
	Header

	KeyPhase protocol.KeyPhaseBit

	PacketNumberLen protocol.PacketNumberLen
	PacketNumber    protocol.PacketNumber
	// contains filtered or unexported fields
}

ExtendedHeader is the header of a QUIC packet.

func (*ExtendedHeader) Append 

func (h *ExtendedHeader) Append(b []byte, v protocol.Version) ([]byte, error)

Append appends the Header.

func (*ExtendedHeader) GetLength 

func (h *ExtendedHeader) GetLength(_ protocol.Version) protocol.ByteCount

GetLength determines the length of the Header.

func (*ExtendedHeader) Log 

func (h *ExtendedHeader) Log(logger utils.Logger)

Log logs the Header

func (*ExtendedHeader) ParsedLen 

func (h *ExtendedHeader) ParsedLen() protocol.ByteCount

ParsedLen returns the number of bytes that were consumed when parsing the header

type Frame 

type Frame interface {
	Append(b []byte, version protocol.Version) ([]byte, error)
	Length(version protocol.Version) protocol.ByteCount
}

A Frame in QUIC

type FrameParser 

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

The FrameParser parses QUIC frames, one by one.

func NewFrameParser 

func NewFrameParser(supportsDatagrams bool) *FrameParser

NewFrameParser creates a new frame parser.

func (*FrameParser) ParseNext 

func (p *FrameParser) ParseNext(data []byte, encLevel protocol.EncryptionLevel, v protocol.Version) (int, Frame, error)

ParseNext parses the next frame. It skips PADDING frames.

func (*FrameParser) SetAckDelayExponent 

func (p *FrameParser) SetAckDelayExponent(exp uint8)

SetAckDelayExponent sets the acknowledgment delay exponent (sent in the transport parameters). This value is used to scale the ACK Delay field in the ACK frame.

type HandshakeDoneFrame 

type HandshakeDoneFrame struct{}

A HandshakeDoneFrame is a HANDSHAKE_DONE frame

func (*HandshakeDoneFrame) Append 

func (f *HandshakeDoneFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*HandshakeDoneFrame) Length 

func (f *HandshakeDoneFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame 

type Header struct {
	Type protocol.PacketType

	Version          protocol.Version
	SrcConnectionID  protocol.ConnectionID
	DestConnectionID protocol.ConnectionID

	Length protocol.ByteCount

	Token []byte
	// contains filtered or unexported fields
}

The Header is the version independent part of the header

func ParsePacket 

func ParsePacket(data []byte) (*Header, []byte, []byte, error)

ParsePacket parses a packet. If the packet has a long header, the packet is cut according to the length field. If we understand the version, the packet is header up unto the packet number. Otherwise, only the invariant part of the header is parsed.

func (*Header) PacketType 

func (h *Header) PacketType() string

PacketType is the type of the packet, for logging purposes

func (*Header) ParseExtended 

func (h *Header) ParseExtended(b *bytes.Reader, ver protocol.Version) (*ExtendedHeader, error)

ParseExtended parses the version dependent part of the header. The Reader has to be set such that it points to the first byte of the header.

func (*Header) ParsedLen 

func (h *Header) ParsedLen() protocol.ByteCount

ParsedLen returns the number of bytes that were consumed when parsing the header

type MaxDataFrame 

type MaxDataFrame struct {
	MaximumData protocol.ByteCount
}

A MaxDataFrame carries flow control information for the connection

func (*MaxDataFrame) Append 

func (f *MaxDataFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*MaxDataFrame) Length 

func (f *MaxDataFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type MaxStreamDataFrame 

type MaxStreamDataFrame struct {
	StreamID          protocol.StreamID
	MaximumStreamData protocol.ByteCount
}

A MaxStreamDataFrame is a MAX_STREAM_DATA frame

func (*MaxStreamDataFrame) Append 

func (f *MaxStreamDataFrame) Append(b []byte, version protocol.Version) ([]byte, error)

func (*MaxStreamDataFrame) Length 

func (f *MaxStreamDataFrame) Length(version protocol.Version) protocol.ByteCount

Length of a written frame

type MaxStreamsFrame 

type MaxStreamsFrame struct {
	Type         protocol.StreamType
	MaxStreamNum protocol.StreamNum
}

A MaxStreamsFrame is a MAX_STREAMS frame

func (*MaxStreamsFrame) Append 

func (f *MaxStreamsFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*MaxStreamsFrame) Length 

func (f *MaxStreamsFrame) Length(protocol.Version) protocol.ByteCount

Length of a written frame

type NewConnectionIDFrame 

type NewConnectionIDFrame struct {
	SequenceNumber      uint64
	RetirePriorTo       uint64
	ConnectionID        protocol.ConnectionID
	StatelessResetToken protocol.StatelessResetToken
}

A NewConnectionIDFrame is a NEW_CONNECTION_ID frame

func (*NewConnectionIDFrame) Append 

func (f *NewConnectionIDFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*NewConnectionIDFrame) Length 

func (f *NewConnectionIDFrame) Length(protocol.Version) protocol.ByteCount

Length of a written frame

type NewTokenFrame 

type NewTokenFrame struct {
	Token []byte
}

A NewTokenFrame is a NEW_TOKEN frame

func (*NewTokenFrame) Append 

func (f *NewTokenFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*NewTokenFrame) Length 

func (f *NewTokenFrame) Length(protocol.Version) protocol.ByteCount

Length of a written frame

type PathChallengeFrame 

type PathChallengeFrame struct {
	Data [8]byte
}

A PathChallengeFrame is a PATH_CHALLENGE frame

func (*PathChallengeFrame) Append 

func (f *PathChallengeFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*PathChallengeFrame) Length 

func (f *PathChallengeFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type PathResponseFrame 

type PathResponseFrame struct {
	Data [8]byte
}

A PathResponseFrame is a PATH_RESPONSE frame

func (*PathResponseFrame) Append 

func (f *PathResponseFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*PathResponseFrame) Length 

func (f *PathResponseFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type PingFrame 

type PingFrame struct{}

A PingFrame is a PING frame

func (*PingFrame) Append 

func (f *PingFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*PingFrame) Length 

func (f *PingFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type PreferredAddress 

type PreferredAddress struct {
	IPv4, IPv6          netip.AddrPort
	ConnectionID        protocol.ConnectionID
	StatelessResetToken protocol.StatelessResetToken
}

PreferredAddress is the value encoding in the preferred_address transport parameter

type ResetStreamFrame 

type ResetStreamFrame struct {
	StreamID  protocol.StreamID
	ErrorCode qerr.StreamErrorCode
	FinalSize protocol.ByteCount
}

A ResetStreamFrame is a RESET_STREAM frame in QUIC

func (*ResetStreamFrame) Append 

func (f *ResetStreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*ResetStreamFrame) Length 

func (f *ResetStreamFrame) Length(version protocol.Version) protocol.ByteCount

Length of a written frame

type RetireConnectionIDFrame 

type RetireConnectionIDFrame struct {
	SequenceNumber uint64
}

A RetireConnectionIDFrame is a RETIRE_CONNECTION_ID frame

func (*RetireConnectionIDFrame) Append 

func (f *RetireConnectionIDFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*RetireConnectionIDFrame) Length 

func (f *RetireConnectionIDFrame) Length(protocol.Version) protocol.ByteCount

Length of a written frame

type StopSendingFrame 

type StopSendingFrame struct {
	StreamID  protocol.StreamID
	ErrorCode qerr.StreamErrorCode
}

A StopSendingFrame is a STOP_SENDING frame

func (*StopSendingFrame) Append 

func (f *StopSendingFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*StopSendingFrame) Length 

func (f *StopSendingFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type StreamDataBlockedFrame 

type StreamDataBlockedFrame struct {
	StreamID          protocol.StreamID
	MaximumStreamData protocol.ByteCount
}

A StreamDataBlockedFrame is a STREAM_DATA_BLOCKED frame

func (*StreamDataBlockedFrame) Append 

func (f *StreamDataBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*StreamDataBlockedFrame) Length 

func (f *StreamDataBlockedFrame) Length(version protocol.Version) protocol.ByteCount

Length of a written frame

type StreamFrame 

type StreamFrame struct {
	StreamID       protocol.StreamID
	Offset         protocol.ByteCount
	Data           []byte
	Fin            bool
	DataLenPresent bool
	// contains filtered or unexported fields
}

A StreamFrame of QUIC

func GetStreamFrame 

func GetStreamFrame() *StreamFrame

func (*StreamFrame) Append 

func (f *StreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

Write writes a STREAM frame

func (*StreamFrame) DataLen 

func (f *StreamFrame) DataLen() protocol.ByteCount

DataLen gives the length of data in bytes

func (*StreamFrame) Length 

func (f *StreamFrame) Length(version protocol.Version) protocol.ByteCount

Length returns the total length of the STREAM frame

func (*StreamFrame) MaxDataLen 

func (f *StreamFrame) MaxDataLen(maxSize protocol.ByteCount, version protocol.Version) protocol.ByteCount

MaxDataLen returns the maximum data length If 0 is returned, writing will fail (a STREAM frame must contain at least 1 byte of data).

func (*StreamFrame) MaybeSplitOffFrame 

func (f *StreamFrame) MaybeSplitOffFrame(maxSize protocol.ByteCount, version protocol.Version) (*StreamFrame, bool)

MaybeSplitOffFrame splits a frame such that it is not bigger than n bytes. It returns if the frame was actually split. The frame might not be split if: * the size is large enough to fit the whole frame * the size is too small to fit even a 1-byte frame. In that case, the frame returned is nil.

func (*StreamFrame) PutBack 

func (f *StreamFrame) PutBack()

type StreamsBlockedFrame 

type StreamsBlockedFrame struct {
	Type        protocol.StreamType
	StreamLimit protocol.StreamNum
}

A StreamsBlockedFrame is a STREAMS_BLOCKED frame

func (*StreamsBlockedFrame) Append 

func (f *StreamsBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error)

func (*StreamsBlockedFrame) Length 

func (f *StreamsBlockedFrame) Length(_ protocol.Version) protocol.ByteCount

Length of a written frame

type TransportParameters 

type TransportParameters struct {
	InitialMaxStreamDataBidiLocal  protocol.ByteCount
	InitialMaxStreamDataBidiRemote protocol.ByteCount
	InitialMaxStreamDataUni        protocol.ByteCount
	InitialMaxData                 protocol.ByteCount

	MaxAckDelay      time.Duration
	AckDelayExponent uint8

	DisableActiveMigration bool

	MaxUDPPayloadSize protocol.ByteCount

	MaxUniStreamNum  protocol.StreamNum
	MaxBidiStreamNum protocol.StreamNum

	MaxIdleTimeout time.Duration

	PreferredAddress *PreferredAddress

	OriginalDestinationConnectionID protocol.ConnectionID
	InitialSourceConnectionID       protocol.ConnectionID
	RetrySourceConnectionID         *protocol.ConnectionID // use a pointer here to distinguish zero-length connection IDs from missing transport parameters

	StatelessResetToken     *protocol.StatelessResetToken
	ActiveConnectionIDLimit uint64

	MaxDatagramFrameSize protocol.ByteCount
}

TransportParameters are parameters sent to the peer during the handshake

func (*TransportParameters) Marshal 

func (p *TransportParameters) Marshal(pers protocol.Perspective) []byte

Marshal the transport parameters

func (*TransportParameters) MarshalForSessionTicket 

func (p *TransportParameters) MarshalForSessionTicket(b []byte) []byte

MarshalForSessionTicket marshals the transport parameters we save in the session ticket. When sending a 0-RTT enabled TLS session tickets, we need to save the transport parameters. The client will remember the transport parameters used in the last session, and apply those to the 0-RTT data it sends. Saving the transport parameters in the ticket gives the server the option to reject 0-RTT if the transport parameters changed. Since the session ticket is encrypted, the serialization format is defined by the server. For convenience, we use the same format that we also use for sending the transport parameters.

func (*TransportParameters) String 

func (p *TransportParameters) String() string

String returns a string representation, intended for logging.

func (*TransportParameters) Unmarshal 

func (p *TransportParameters) Unmarshal(data []byte, sentBy protocol.Perspective) error

Unmarshal the transport parameters

func (*TransportParameters) UnmarshalFromSessionTicket 

func (p *TransportParameters) UnmarshalFromSessionTicket(r *bytes.Reader) error

UnmarshalFromSessionTicket unmarshals transport parameters from a session ticket.

func (*TransportParameters) ValidFor0RTT 

func (p *TransportParameters) ValidFor0RTT(saved *TransportParameters) bool

ValidFor0RTT checks if the transport parameters match those saved in the session ticket.

func (*TransportParameters) ValidForUpdate 

func (p *TransportParameters) ValidForUpdate(saved *TransportParameters) bool

ValidForUpdate checks that the new transport parameters don't reduce limits after resuming a 0-RTT connection. It is only used on the client side.

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