discover

package
v0.0.0-...-dc4fad8 Latest Latest
Warning

This package is not in the latest version of its module.

Go to latest
Published: Feb 29, 2020 License: GPL-3.0 Imports: 20 Imported by: 0

Documentation

Overview

Package discover implements the Node Discovery Protocol.

The Node Discovery protocol provides a way to find RLPx nodes that can be connected to. It uses a Kademlia-like protocol to maintain a distributed database of the IDs and endpoints of all listening nodes.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Config

type Config struct {
	// These settings are required and configure the UDP listener:
	PrivateKey *ecdsa.PrivateKey
	TCPPort    int    // tcp port
	MagicNetID uint64 // magic net id

	// These settings are optional:
	AnnounceAddr *net.UDPAddr      // local address announced in the DHT
	NodeDBPath   string            // if set, the node database is stored at this filesystem location
	NetRestrict  *netutil.Netlist  // network whitelist
	Bootnodes    []*enode.Node     // list of bootstrap nodes
	Unhandled    chan<- ReadPacket // unhandled packets are sent on this channel
}

Config holds Table-related settings.

type ReadPacket

type ReadPacket struct {
	Data []byte
	Addr *net.UDPAddr
}

ReadPacket is sent to the unhandled channel when it could not be processed

type Table

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

func ListenUDP

func ListenUDP(c conn, cfg Config) (*Table, error)

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

func (*Table) Close

func (tab *Table) Close()

Close terminates the network listener and flushes the node database.

func (*Table) LookupRandom

func (tab *Table) LookupRandom() []*enode.Node

LookupRandom finds random nodes in the network.

func (*Table) ReadRandomNodes

func (tab *Table) ReadRandomNodes(buf []*enode.Node) (n int)

ReadRandomNodes fills the given slice with random nodes from the table. The results are guaranteed to be unique for a single invocation, no node will appear twice.

func (*Table) Resolve

func (tab *Table) Resolve(n *enode.Node) *enode.Node

Resolve searches for a specific node with the given ID. It returns nil if the node could not be found.

func (*Table) SeedNodes

func (tab *Table) SeedNodes() []*enode.Node

SeedNodes return all of the seed nodes

func (*Table) Self

func (tab *Table) Self() *enode.Node

Self returns the local node.

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL