v5wire

package
v1.0.3 Latest Latest
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 Go to latest Published: Sep 9, 2024 License: GPL-3.0 Imports: 22 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	PingMsg byte = iota + 1
	PongMsg
	FindnodeMsg
	NodesMsg
	TalkRequestMsg
	TalkResponseMsg
	RequestTicketMsg
	TicketMsg

	UnknownPacket   = byte(255) // any non-decryptable packet
	WhoareyouPacket = byte(254) // the WHOAREYOU packet
)

Message types.

Variables

View Source 
var DefaultProtocolID = [6]byte{'d', 'i', 's', 'c', 'v', '5'}
View Source 
var (
	// ErrInvalidReqID represents error when the ID is invalid.
	ErrInvalidReqID = errors.New("request ID larger than 8 bytes")
)

Public errors.

Functions

func DecodePubkey 

func DecodePubkey(curve elliptic.Curve, e []byte) (*ecdsa.PublicKey, error)

DecodePubkey decodes a public key in compressed format.

func EncodePubkey 

func EncodePubkey(key *ecdsa.PublicKey) []byte

EncodePubkey encodes a public key.

func IsInvalidHeader 

func IsInvalidHeader(err error) bool

IsInvalidHeader reports whether 'err' is related to an invalid packet header. When it returns false, it is pretty certain that the packet causing the error does not belong to discv5.

Types

type Codec 

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

Codec encodes and decodes Discovery v5 packets. This type is not safe for concurrent use.

func NewCodec 

func NewCodec(ln *enode.LocalNode, key *ecdsa.PrivateKey, clock mclock.Clock, protocolID *[6]byte) *Codec

NewCodec creates a wire codec.

func (*Codec) Decode 

func (c *Codec) Decode(inputData []byte, addr string) (src enode.ID, n *enode.Node, p Packet, err error)

Decode decodes a discovery packet.

func (*Codec) Encode 

func (c *Codec) Encode(id enode.ID, addr string, packet Packet, challenge *Whoareyou) ([]byte, Nonce, error)

Encode encodes a packet to a node. 'id' and 'addr' specify the destination node. The 'challenge' parameter should be the most recently received WHOAREYOU packet from that node.

func (*Codec) EncodeRaw 

func (c *Codec) EncodeRaw(id enode.ID, head Header, msgdata []byte) ([]byte, error)

EncodeRaw encodes a packet with the given header.

type Findnode 

type Findnode struct {
	ReqID     []byte
	Distances []uint

	// OpID is for debugging purposes and is not part of the packet encoding.
	// It identifies the 'operation' on behalf of which the request was sent.
	OpID uint64 `rlp:"-"`
}

FINDNODE is a query for nodes in the given bucket.

func (*Findnode) AppendLogInfo 

func (p *Findnode) AppendLogInfo(ctx []interface{}) []interface{}

func (*Findnode) Kind 

func (p *Findnode) Kind() byte

func (*Findnode) Name 

func (p *Findnode) Name() string

func (*Findnode) RequestID 

func (p *Findnode) RequestID() []byte

func (*Findnode) SetRequestID 

func (p *Findnode) SetRequestID(id []byte)
type Header struct {
	IV [sizeofMaskingIV]byte
	StaticHeader
	AuthData []byte
	// contains filtered or unexported fields
}

Header represents a packet header.

type Nodes 

type Nodes struct {
	ReqID     []byte
	RespCount uint8 // total number of responses to the request
	Nodes     []*enr.Record
}

NODES is a response to FINDNODE.

func (*Nodes) AppendLogInfo 

func (p *Nodes) AppendLogInfo(ctx []interface{}) []interface{}

func (*Nodes) Kind 

func (*Nodes) Kind() byte

func (*Nodes) Name 

func (*Nodes) Name() string

func (*Nodes) RequestID 

func (p *Nodes) RequestID() []byte

func (*Nodes) SetRequestID 

func (p *Nodes) SetRequestID(id []byte)

type Nonce 

type Nonce [gcmNonceSize]byte

Nonce represents a nonce used for AES/GCM.

type Packet 

type Packet interface {
	Name() string        // Name returns a string corresponding to the message type.
	Kind() byte          // Kind returns the message type.
	RequestID() []byte   // Returns the request ID.
	SetRequestID([]byte) // Sets the request ID.

	// AppendLogInfo returns its argument 'ctx' with additional fields
	// appended for logging purposes.
	AppendLogInfo(ctx []interface{}) []interface{}
}

Packet is implemented by all message types.

func DecodeMessage 

func DecodeMessage(ptype byte, body []byte) (Packet, error)

DecodeMessage decodes the message body of a packet.

type Ping 

type Ping struct {
	ReqID  []byte
	ENRSeq uint64
}

PING is sent during liveness checks.

func (*Ping) AppendLogInfo 

func (p *Ping) AppendLogInfo(ctx []interface{}) []interface{}

func (*Ping) Kind 

func (*Ping) Kind() byte

func (*Ping) Name 

func (*Ping) Name() string

func (*Ping) RequestID 

func (p *Ping) RequestID() []byte

func (*Ping) SetRequestID 

func (p *Ping) SetRequestID(id []byte)

type Pong 

type Pong struct {
	ReqID  []byte
	ENRSeq uint64
	ToIP   net.IP // These fields should mirror the UDP envelope address of the ping
	ToPort uint16 // packet, which provides a way to discover the external address (after NAT).
}

PONG is the reply to PING.

func (*Pong) AppendLogInfo 

func (p *Pong) AppendLogInfo(ctx []interface{}) []interface{}

func (*Pong) Kind 

func (*Pong) Kind() byte

func (*Pong) Name 

func (*Pong) Name() string

func (*Pong) RequestID 

func (p *Pong) RequestID() []byte

func (*Pong) SetRequestID 

func (p *Pong) SetRequestID(id []byte)

type SessionCache 

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

The SessionCache keeps negotiated encryption keys and state for in-progress handshakes in the Discovery v5 wire protocol.

func NewSessionCache 

func NewSessionCache(maxItems int, clock mclock.Clock) *SessionCache

type StaticHeader 

type StaticHeader struct {
	ProtocolID [6]byte
	Version    uint16
	Flag       byte
	Nonce      Nonce
	AuthSize   uint16
}

StaticHeader contains the static fields of a packet header.

type TalkRequest 

type TalkRequest struct {
	ReqID    []byte
	Protocol string
	Message  []byte
}

TALKREQ is an application-level request.

func (*TalkRequest) AppendLogInfo 

func (p *TalkRequest) AppendLogInfo(ctx []interface{}) []interface{}

func (*TalkRequest) Kind 

func (*TalkRequest) Kind() byte

func (*TalkRequest) Name 

func (*TalkRequest) Name() string

func (*TalkRequest) RequestID 

func (p *TalkRequest) RequestID() []byte

func (*TalkRequest) SetRequestID 

func (p *TalkRequest) SetRequestID(id []byte)

type TalkResponse 

type TalkResponse struct {
	ReqID   []byte
	Message []byte
}

TALKRESP is the reply to TALKREQ.

func (*TalkResponse) AppendLogInfo 

func (p *TalkResponse) AppendLogInfo(ctx []interface{}) []interface{}

func (*TalkResponse) Kind 

func (*TalkResponse) Kind() byte

func (*TalkResponse) Name 

func (*TalkResponse) Name() string

func (*TalkResponse) RequestID 

func (p *TalkResponse) RequestID() []byte

func (*TalkResponse) SetRequestID 

func (p *TalkResponse) SetRequestID(id []byte)

type Unknown 

type Unknown struct {
	Nonce Nonce
}

Unknown represents any packet that can't be decrypted.

func (*Unknown) AppendLogInfo 

func (*Unknown) AppendLogInfo(ctx []interface{}) []interface{}

func (*Unknown) Kind 

func (*Unknown) Kind() byte

func (*Unknown) Name 

func (*Unknown) Name() string

func (*Unknown) RequestID 

func (*Unknown) RequestID() []byte

func (*Unknown) SetRequestID 

func (*Unknown) SetRequestID([]byte)

type Whoareyou 

type Whoareyou struct {
	ChallengeData []byte   // Encoded challenge
	Nonce         Nonce    // Nonce of request packet
	IDNonce       [16]byte // Identity proof data
	RecordSeq     uint64   // ENR sequence number of recipient

	// Node is the locally known node record of recipient.
	// This must be set by the caller of Encode.
	Node *enode.Node
	// contains filtered or unexported fields
}

WHOAREYOU contains the handshake challenge.

func (*Whoareyou) AppendLogInfo 

func (*Whoareyou) AppendLogInfo(ctx []interface{}) []interface{}

func (*Whoareyou) Kind 

func (*Whoareyou) Kind() byte

func (*Whoareyou) Name 

func (*Whoareyou) Name() string

func (*Whoareyou) RequestID 

func (*Whoareyou) RequestID() []byte

func (*Whoareyou) SetRequestID 

func (*Whoareyou) SetRequestID([]byte)

Source Files

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