kadv6

package
v0.1.0 Latest Latest
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 Go to latest Published: Jul 29, 2026 License: MIT Imports: 7 Imported by: 0

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Index

Constants

View Source 
const (
	BootstrapReqOp     byte = 0x01
	BootstrapResOp     byte = 0x09
	HelloReqOp         byte = 0x11
	HelloResOp         byte = 0x19
	FindNodeReqOp      byte = 0x21
	FindNodeResOp      byte = 0x29
	SearchKeysReqOp    byte = 0x33
	SearchSrcReqOp     byte = 0x34
	SearchNotesReqOp   byte = 0x35
	SearchResOp        byte = 0x3B
	PublishKeysReqOp   byte = 0x43
	PublishSourceReqOp byte = 0x44
	PublishNotesReqOp  byte = 0x45
	PublishResOp       byte = 0x4B
	PingOp             byte = 0x60
	PongOp             byte = 0x61

	FindValue byte = 0x02
	Store     byte = 0x04
	FindNode  byte = 0x0B
)
View Source 
const (
	// ProtocolHeader marks KADV6 UDP packets.
	ProtocolHeader byte = 0xE6
	// KademliaVersion is the first published KADV6 protocol version.
	KademliaVersion byte = 0x01

	// Tag types use a simpler typed tag encoding than legacy Kad.
	TagTypeString byte = 0x02
	TagTypeUint32 byte = 0x03
	TagTypeUint16 byte = 0x08
	TagTypeUint8  byte = 0x09
	TagTypeUint64 byte = 0x0B
	TagTypeBytes  byte = 0x0C

	// Source-related tag identifiers.
	TagName          byte = 0x01
	TagFileSize      byte = 0xD3
	TagAddrFamily    byte = 0xEE
	TagSourceIP6     byte = 0xF0
	TagSourceUDPPort byte = 0xFC
	TagSourcePort    byte = 0xFD
	TagSourceType    byte = 0xFF

	// Supported address family in KADV6.
	AddrFamilyIPv6 byte = 6
)

Variables

This section is empty.

Functions

func DecodePacket 

func DecodePacket(packet []byte) (byte, []byte, error)

DecodePacket extracts the opcode and payload from a packet.

func DistanceCompare 

func DistanceCompare(a, b, target ID) int

DistanceCompare compares XOR distances to the target.

Types

type BootstrapReq 

type BootstrapReq struct{}

BootstrapReq asks a known node for contacts.

func (BootstrapReq) Pack 

func (BootstrapReq) Pack() ([]byte, error)

Pack encodes the request.

type BootstrapRes 

type BootstrapRes struct {
	ID       ID
	TCPPort  uint16
	Version  byte
	Contacts []EntryV6
}

BootstrapRes returns contacts near the responder.

func (BootstrapRes) Pack 

func (b BootstrapRes) Pack() ([]byte, error)

Pack encodes the response payload.

func (*BootstrapRes) Unpack 

func (b *BootstrapRes) Unpack(payload []byte) error

Unpack decodes the response payload.

type EndpointV6 

type EndpointV6 struct {
	IP      [16]byte
	UDPPort uint16
	TCPPort uint16
}

EndpointV6 stores a native IPv6 endpoint for KADV6 contacts.

func EndpointFromIP 

func EndpointFromIP(ip net.IP, udpPort, tcpPort uint16) (EndpointV6, error)

EndpointFromIP builds an endpoint from a native IPv6 address.

func EndpointFromUDPAddr 

func EndpointFromUDPAddr(addr *net.UDPAddr, tcpPort uint16) (EndpointV6, error)

EndpointFromUDPAddr builds an endpoint from a UDP address plus advertised TCP port.

func (*EndpointV6) Get 

func (e *EndpointV6) Get(src *bytes.Reader) error

Get decodes the endpoint from a reader.

func (EndpointV6) IPNet 

func (e EndpointV6) IPNet() net.IP

IPNet returns a copy of the stored IPv6 address as net.IP.

func (EndpointV6) Put 

func (e EndpointV6) Put(dst *bytes.Buffer) error

Put encodes the endpoint into a buffer.

func (EndpointV6) String 

func (e EndpointV6) String() string

String renders the endpoint in bracketed IPv6 form.

func (EndpointV6) TCPAddr 

func (e EndpointV6) TCPAddr() *net.TCPAddr

TCPAddr converts the endpoint to a TCP address.

func (EndpointV6) UDPAddr 

func (e EndpointV6) UDPAddr() *net.UDPAddr

UDPAddr converts the endpoint to a UDP address.

func (EndpointV6) Validate 

func (e EndpointV6) Validate() error

Validate checks whether the endpoint can be routed inside KADV6.

type EntryV6 

type EntryV6 struct {
	ID       ID
	Endpoint EndpointV6
	Version  byte
	Verified bool
}

EntryV6 is a KADV6 routing entry.

func (*EntryV6) Get 

func (e *EntryV6) Get(src *bytes.Reader) error

Get decodes an entry from a reader.

func (EntryV6) Put 

func (e EntryV6) Put(dst *bytes.Buffer) error

Put encodes an entry into a buffer.

type FindNodeReq 

type FindNodeReq struct {
	SearchType byte
	Target     ID
	Receiver   ID
}

FindNodeReq asks for closer contacts to a target id.

func (FindNodeReq) Pack 

func (r FindNodeReq) Pack() ([]byte, error)

Pack encodes a find-node request.

func (*FindNodeReq) Unpack 

func (r *FindNodeReq) Unpack(payload []byte) error

Unpack decodes a find-node request.

type FindNodeRes 

type FindNodeRes struct {
	Target  ID
	Results []EntryV6
}

FindNodeRes returns contacts for a target id.

func (FindNodeRes) Pack 

func (r FindNodeRes) Pack() ([]byte, error)

Pack encodes a find-node response.

func (*FindNodeRes) Unpack 

func (r *FindNodeRes) Unpack(payload []byte) error

Unpack decodes a find-node response.

type Hello 

type Hello struct {
	ID      ID
	TCPPort uint16
	Version byte
	Tags    []Tag
}

Hello confirms node identity and service port.

func (Hello) Pack 

func (h Hello) Pack(opcode byte) ([]byte, error)

Pack encodes the hello payload with the given opcode.

func (*Hello) Unpack 

func (h *Hello) Unpack(payload []byte) error

Unpack decodes a hello payload.

type ID 

type ID struct {
	protocol.Hash
}

ID is the KADV6 node identifier.

func NewID 

func NewID(hash protocol.Hash) ID

NewID wraps a protocol hash as a KADV6 node id.

func (*ID) Get 

func (i *ID) Get(src *bytes.Reader) error

Get decodes the node id from a reader.

func (ID) Put 

func (i ID) Put(dst *bytes.Buffer) error

Put encodes the node id into a buffer.

type NodesDat 

type NodesDat struct {
	Version          uint32
	BootstrapEdition uint32
	Contacts         []EntryV6
}

NodesDat stores bootstrap contacts for KADV6.

func LoadNodesDat 

func LoadNodesDat(path string) (*NodesDat, error)

LoadNodesDat loads and parses a KADV6 nodes file from disk.

func ParseNodesDat 

func ParseNodesDat(raw []byte) (*NodesDat, error)

ParseNodesDat decodes a KADV6 nodes file from raw bytes.

func (NodesDat) Pack 

func (n NodesDat) Pack() ([]byte, error)

Pack encodes the nodes6.dat payload.

func (*NodesDat) Unpack 

func (n *NodesDat) Unpack(payload []byte) error

Unpack decodes the binary nodes6.dat payload.

type PacketCombiner 

type PacketCombiner struct{}

PacketCombiner packs and unpacks KADV6 packets by opcode.

func (PacketCombiner) Pack 

func (PacketCombiner) Pack(packet any, extra ...byte) ([]byte, error)

Pack encodes a typed message into a full packet.

func (PacketCombiner) Unpack 

func (PacketCombiner) Unpack(packet []byte) (byte, any, error)

Unpack decodes a full packet into a typed message.

type Ping 

type Ping struct{}

Ping is an empty liveness probe.

func (Ping) Pack 

func (Ping) Pack() ([]byte, error)

Pack encodes a ping packet.

type Pong 

type Pong struct {
	UDPPort uint16
}

Pong returns the active UDP port.

func (Pong) Pack 

func (p Pong) Pack() ([]byte, error)

Pack encodes a pong payload.

func (*Pong) Unpack 

func (p *Pong) Unpack(payload []byte) error

Unpack decodes a pong payload.

type PublishKeysReq 

type PublishKeysReq struct {
	KeywordID ID
	Sources   []SearchEntry
}

PublishKeysReq publishes keyword records.

func (PublishKeysReq) Pack 

func (p PublishKeysReq) Pack() ([]byte, error)

Pack encodes a keyword publish request.

func (*PublishKeysReq) Unpack 

func (p *PublishKeysReq) Unpack(payload []byte) error

Unpack decodes a keyword publish request.

type PublishNotesReq 

type PublishNotesReq struct {
	FileID ID
	Notes  []SearchEntry
}

PublishNotesReq publishes note records.

func (PublishNotesReq) Pack 

func (p PublishNotesReq) Pack() ([]byte, error)

Pack encodes a notes publish request.

func (*PublishNotesReq) Unpack 

func (p *PublishNotesReq) Unpack(payload []byte) error

Unpack decodes a notes publish request.

type PublishRes 

type PublishRes struct {
	FileID ID
	Count  byte
}

PublishRes acknowledges one or more published records.

func (PublishRes) Pack 

func (p PublishRes) Pack() ([]byte, error)

Pack encodes a publish response.

func (*PublishRes) Unpack 

func (p *PublishRes) Unpack(payload []byte) error

Unpack decodes a publish response.

type PublishSourcesReq 

type PublishSourcesReq struct {
	FileID ID
	Source SearchEntry
}

PublishSourcesReq publishes one source record.

func (PublishSourcesReq) Pack 

func (p PublishSourcesReq) Pack() ([]byte, error)

Pack encodes a source publish request.

func (*PublishSourcesReq) Unpack 

func (p *PublishSourcesReq) Unpack(payload []byte) error

Unpack decodes a source publish request.

type SearchEntry 

type SearchEntry struct {
	ID   ID
	Tags []Tag
}

SearchEntry stores source, keyword, or note metadata.

func (SearchEntry) BytesTag 

func (s SearchEntry) BytesTag(id byte) ([]byte, bool)

BytesTag returns the first matching raw-bytes tag.

func (*SearchEntry) Get 

func (s *SearchEntry) Get(src *bytes.Reader) error

Get decodes a search entry from a reader.

func (SearchEntry) Put 

func (s SearchEntry) Put(dst *bytes.Buffer) error

Put encodes a search entry into a buffer.

func (SearchEntry) SourceAddr 

func (s SearchEntry) SourceAddr() (*net.TCPAddr, bool)

SourceAddr extracts a direct IPv6 TCP source from the search entry.

func (SearchEntry) StringTag 

func (s SearchEntry) StringTag(id byte) (string, bool)

StringTag returns the first matching string tag.

func (SearchEntry) UIntTag 

func (s SearchEntry) UIntTag(id byte) (uint64, bool)

UIntTag returns the first matching unsigned integer tag.

type SearchKeysReq 

type SearchKeysReq struct {
	Target   ID
	StartPos uint16
}

SearchKeysReq requests keyword records.

func (SearchKeysReq) Pack 

func (s SearchKeysReq) Pack() ([]byte, error)

Pack encodes a keyword search request.

func (*SearchKeysReq) Unpack 

func (s *SearchKeysReq) Unpack(payload []byte) error

Unpack decodes a keyword search request.

type SearchNotesReq 

type SearchNotesReq struct {
	Target   ID
	StartPos uint16
}

SearchNotesReq requests note records.

func (SearchNotesReq) Pack 

func (s SearchNotesReq) Pack() ([]byte, error)

Pack encodes a notes search request.

func (*SearchNotesReq) Unpack 

func (s *SearchNotesReq) Unpack(payload []byte) error

Unpack decodes a notes search request.

type SearchRes 

type SearchRes struct {
	Source  ID
	Target  ID
	Results []SearchEntry
}

SearchRes returns search entries for a target.

func (SearchRes) Pack 

func (s SearchRes) Pack() ([]byte, error)

Pack encodes a search response.

func (*SearchRes) Unpack 

func (s *SearchRes) Unpack(payload []byte) error

Unpack decodes a search response.

type SearchSourcesReq 

type SearchSourcesReq struct {
	Target   ID
	StartPos uint16
	Size     uint64
}

SearchSourcesReq requests source records for a file.

func (SearchSourcesReq) Pack 

func (s SearchSourcesReq) Pack() ([]byte, error)

Pack encodes a source search request.

func (*SearchSourcesReq) Unpack 

func (s *SearchSourcesReq) Unpack(payload []byte) error

Unpack decodes a source search request.

type Tag 

type Tag struct {
	Type   byte
	ID     byte
	UInt64 uint64
	String string
	Bytes  []byte
}

Tag stores one typed metadata value.

func (*Tag) Get 

func (t *Tag) Get(src *bytes.Reader) error

Get decodes a tag from a reader.

func (Tag) Put 

func (t Tag) Put(dst *bytes.Buffer) error

Put encodes a tag into a buffer.

Source Files

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