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Documentation

Index

• Constants
• func ListenUDP(priv *ecdsa.PrivateKey, nodeType NodeType, laddr string, natm nat.Interface, ...) (*Table, *EndPoint, error)
• type EndPoint
• type ExtData
• type Node
  • func MustParseNode(rawurl string) *Node
  • func NewNode(id NodeID, ip net.IP, udpPort, tcpPort uint16) *Node
  • func ParseNode(rawurl string) (*Node, error)
  • func (n *Node) Incomplete() bool
  • func (n *Node) MarshalText() ([]byte, error)
  • func (n *Node) String() string
  • func (n *Node) UnmarshalText(text []byte) error
• type NodeID
  • func BytesID(b []byte) (NodeID, error)
  • func HexID(in string) (NodeID, error)
  • func MustBytesID(b []byte) NodeID
  • func MustHexID(in string) NodeID
  • func PubkeyID(pub *ecdsa.PublicKey) NodeID
  • func (n NodeID) Bytes() []byte
  • func (n NodeID) GoString() string
  • func (n NodeID) MarshalText() ([]byte, error)
  • func (id NodeID) Pubkey() (*ecdsa.PublicKey, error)
  • func (n NodeID) String() string
  • func (n NodeID) TerminalString() string
  • func (n *NodeID) UnmarshalText(text []byte) error
• type NodeReq
• type NodeRes
• type NodeType
  • func (nt NodeType) ToString() string
• type RpcNode
  • func NodeToRPC(n *Node) RpcNode
• type Table
  • func (tab *Table) AddNode(node *Node)
  • func (tab *Table) Bondall(nodes []*Node) int
  • func (tab *Table) Close()
  • func (tab *Table) FindNodes() (buf []*Node)
  • func (tab *Table) HasNode(nid NodeID) bool
  • func (tab *Table) RemoveNode(nid NodeID)
  • func (tab *Table) Self() *Node
  • func (tab *Table) SetFallbackNodes(nodes []*Node) error

Constants

const NodeIDBits = 512

const Version = 0x01

Functions

func ListenUDP

func ListenUDP(priv *ecdsa.PrivateKey, nodeType NodeType, laddr string, natm nat.Interface, nodeDBPath string, netrestrict *netutil.Netlist) (*Table, *EndPoint, error)

ListenUDP returns a new table that listens for UDP packets on laddr.

Types

type EndPoint

type EndPoint struct {
	IP  net.IP // len 4 for IPv4 or 16 for IPv6
	UDP uint16 // for discovery protocol
	TCP uint16 // for RLPx protocol
}

type ExtData

type ExtData struct {
	Loacation uint8
}

type Node

type Node struct {
	IP       net.IP // len 4 for IPv4 or 16 for IPv6
	UDP, TCP uint16 // port numbers
	ID       NodeID // the node's public key

	TYPE NodeType
	Ext  ExtData
	// contains filtered or unexported fields
}

Node represents a host on the network. The fields of Node may not be modified.

func MustParseNode

func MustParseNode(rawurl string) *Node

MustParseNode parses a node URL. It panics if the URL is not valid.

func NewNode

func NewNode(id NodeID, ip net.IP, udpPort, tcpPort uint16) *Node

NewNode creates a new node. It is mostly meant to be used for testing purposes.

func ParseNode

func ParseNode(rawurl string) (*Node, error)

ParseNode parses a node designator.

There are two basic forms of node designators

• incomplete nodes, which only have the public key (node ID)
• complete nodes, which contain the public key and IP/Port information

For incomplete nodes, the designator must look like one of these

hnode://<hex node id>&<int8 node role>
<hex node id>&<int8 node role>

For complete nodes, the node ID is encoded in the username portion of the URL, separated from the host by an @ sign. The hostname can only be given as an IP address, DNS domain names are not allowed. The port in the host name section is the TCP listening port. If the TCP and UDP (discovery) ports differ, the UDP port is specified as query parameter "discport".

In the following example, the node URL describes a node with IP address 10.3.58.6, TCP listening port 30303 and UDP discovery port 30301.

hnode://<hex node id>&<int8 node role>@10.3.58.6:30303?discport=30301

func (*Node) Incomplete

func (n *Node) Incomplete() bool

Incomplete returns true for nodes with no IP address.

func (*Node) MarshalText

func (n *Node) MarshalText() ([]byte, error)

MarshalText implements encoding.TextMarshaler.

func (*Node) String

func (n *Node) String() string

The string representation of a Node is a URL. Please see ParseNode for a description of the format.

func (*Node) UnmarshalText

func (n *Node) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler.

type NodeID

type NodeID [NodeIDBits / 8]byte

NodeID is a unique identifier for each node. The node identifier is a marshaled elliptic curve public key.

func BytesID

func BytesID(b []byte) (NodeID, error)

BytesID converts a byte slice to a NodeID

func HexID

func HexID(in string) (NodeID, error)

HexID converts a hex string to a NodeID. The string may be prefixed with 0x.

func MustBytesID

func MustBytesID(b []byte) NodeID

MustBytesID converts a byte slice to a NodeID. It panics if the byte slice is not a valid NodeID.

func MustHexID

func MustHexID(in string) NodeID

MustHexID converts a hex string to a NodeID. It panics if the string is not a valid NodeID.

func PubkeyID

func PubkeyID(pub *ecdsa.PublicKey) NodeID

PubkeyID returns a marshaled representation of the given public key.

func (NodeID) Bytes

func (n NodeID) Bytes() []byte

Bytes returns a byte slice representation of the NodeID

func (NodeID) GoString

func (n NodeID) GoString() string

The Go syntax representation of a NodeID is a call to HexID.

func (NodeID) MarshalText

func (n NodeID) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (NodeID) Pubkey

func (id NodeID) Pubkey() (*ecdsa.PublicKey, error)

Pubkey returns the public key represented by the node ID. It returns an error if the ID is not a point on the curve.

func (NodeID) String

func (n NodeID) String() string

NodeID prints as a long hexadecimal number.

func (NodeID) TerminalString

func (n NodeID) TerminalString() string

TerminalString returns a shortened hex string for terminal logging.

func (*NodeID) UnmarshalText

func (n *NodeID) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

type NodeReq

type NodeReq struct {
	Version    uint
	Expiration uint64
}

getnodes is a query for nodes

type NodeRes

type NodeRes struct {
	Version    uint
	Nodes      []RpcNode
	Expiration uint64
}

reply to getnodes

type NodeType

type NodeType uint8

const (
	SynNode  NodeType = 0x10
	PreNode  NodeType = 0x30
	HpNode   NodeType = 0x60
	BootNode NodeType = 0xA0
)

func (NodeType) ToString

func (nt NodeType) ToString() string

type RpcNode

type RpcNode struct {
	IP  net.IP // len 4 for IPv4 or 16 for IPv6
	UDP uint16 // for discovery protocol
	TCP uint16 // for RLPx protocol
	ID  NodeID
}

func NodeToRPC

func NodeToRPC(n *Node) RpcNode

type Table

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

func (*Table) AddNode

func (tab *Table) AddNode(node *Node)

func (*Table) Bondall

func (tab *Table) Bondall(nodes []*Node) int

func (*Table) Close

func (tab *Table) Close()

Close terminates the network listener and flushes the node database.

func (*Table) FindNodes

func (tab *Table) FindNodes() (buf []*Node)

func (*Table) HasNode

func (tab *Table) HasNode(nid NodeID) bool

func (*Table) RemoveNode

func (tab *Table) RemoveNode(nid NodeID)

func (*Table) Self

func (tab *Table) Self() *Node

Self returns the local node. The returned node should not be modified by the caller.

func (*Table) SetFallbackNodes

func (tab *Table) SetFallbackNodes(nodes []*Node) error