dep2p

README

DeP2P

DeP2P(Decentralized peer-to-peer) 去中心化对等网络，是用 Go（golang）编写的一种 P2P 对等网络的便捷实现。

该项目目前正在积极开发中，处于 Alpha 状态。

这是一个完全独立的版本，将在底层架构进行更深层的内聚，更好的满足 web3.0 对于去中心化网络基础设施的需求。

文档

该文档正在编写中……

Documentation

Index

• Variables
• func New(opts ...Option) (host.Host, error)
• func NewWithoutDefaults(opts ...Option) (host.Host, error)
• func SetDefaultServiceLimits(config *rcmgr.ScalingLimitConfig)
• type Config
• type Option
  • func AddrsFactory(factory config.AddrsFactory) Option
  • func AutoNATServiceRateLimit(global, perPeer int, interval time.Duration) Option
  • func BandwidthReporter(rep metrics.Reporter) Option
  • func ChainOptions(opts ...Option) Option
  • func ConnectionGater(cg connmgr.ConnectionGater) Option
  • func ConnectionManager(connman connmgr.ConnManager) Option
  • func DialRanker(d network.DialRanker) Option
  • func DisableMetrics() Option
  • func DisableRelay() Option
  • func EnableAutoRelay(opts ...autorelay.Option) Option
  • func EnableAutoRelayWithPeerSource(peerSource autorelay.PeerSource, opts ...autorelay.Option) Option
  • func EnableAutoRelayWithStaticRelays(static []peer.AddrInfo, opts ...autorelay.Option) Option
  • func EnableHolePunching(opts ...holepunch.Option) Option
  • func EnableNATService() Option
  • func EnableRelay() Option
  • func EnableRelayService(opts ...relayv2.Option) Option
  • func ForceReachabilityPrivate() Option
  • func ForceReachabilityPublic() Option
  • func Identity(sk crypto.PrivKey) Option
  • func ListenAddrStrings(s ...string) Option
  • func ListenAddrs(addrs ...ma.Multiaddr) Option
  • func MultiaddrResolver(rslv *madns.Resolver) Option
  • func Muxer(name string, muxer network.Multiplexer) Option
  • func NATManager(nm config.NATManagerC) Option
  • func NATPortMap() Option
  • func Peerstore(ps peerstore.Peerstore) Option
  • func Ping(enable bool) Option
  • func PrivateNetwork(psk pnet.PSK) Option
  • func PrometheusRegisterer(reg prometheus.Registerer) Option
  • func ProtocolVersion(s string) Option
  • func QUICReuse(constructor interface{}, opts ...quicreuse.Option) Option
  • func ResourceManager(rcmgr network.ResourceManager) Option
  • func Routing(rt config.RoutingC) Option
  • func Security(name string, constructor interface{}) Option
  • func SwarmOpts(opts ...swarm.Option) Option
  • func Transport(constructor interface{}, opts ...interface{}) Option
  • func UserAgent(userAgent string) Option
  • func WithDialTimeout(t time.Duration) Option

Variables

var DefaultConnectionManager = func(cfg *Config) error {
	mgr, err := connmgr.NewConnManager(160, 192)
	if err != nil {
		return err
	}

	return cfg.Apply(ConnectionManager(mgr))
}

DefaultConnectionManager creates a default connection manager

var DefaultEnableRelay = func(cfg *Config) error {
	return cfg.Apply(EnableRelay())
}

DefaultEnableRelay enables relay dialing and listening by default.

var DefaultListenAddrs = func(cfg *Config) error {
	addrs := []string{
		"/ip4/0.0.0.0/tcp/0",
		"/ip4/0.0.0.0/udp/0/quic-v1",
		"/ip4/0.0.0.0/udp/0/quic-v1/webtransport",
		"/ip6/::/tcp/0",
		"/ip6/::/udp/0/quic-v1",
		"/ip6/::/udp/0/quic-v1/webtransport",
	}
	listenAddrs := make([]multiaddr.Multiaddr, 0, len(addrs))
	for _, s := range addrs {
		addr, err := multiaddr.NewMultiaddr(s)
		if err != nil {
			return err
		}
		listenAddrs = append(listenAddrs, addr)
	}
	return cfg.Apply(ListenAddrs(listenAddrs...))
}

DefaultListenAddrs configures dep2p to use default listen address.

var DefaultMultiaddrResolver = func(cfg *Config) error {
	return cfg.Apply(MultiaddrResolver(madns.DefaultResolver))
}

DefaultMultiaddrResolver creates a default connection manager

var DefaultMuxers = Muxer(yamux.ID, yamux.DefaultTransport)

DefaultMuxers configures dep2p to use the stream connection multiplexers.

Use this option when you want to *extend* the set of multiplexers used by dep2p instead of replacing them.

var DefaultPrivateTransports = ChainOptions(
	Transport(tcp.NewTCPTransport),
	Transport(ws.New),
)

DefaultPrivateTransports are the default dep2p transports when a PSK is supplied.

Use this option when you want to *extend* the set of transports used by dep2p instead of replacing them.

var DefaultPrometheusRegisterer = func(cfg *Config) error {
	return cfg.Apply(PrometheusRegisterer(prometheus.DefaultRegisterer))
}

DefaultPrometheusRegisterer configures dep2p to use the default registerer

var DefaultResourceManager = func(cfg *Config) error {

	limits := rcmgr.DefaultLimits
	SetDefaultServiceLimits(&limits)
	mgr, err := rcmgr.NewResourceManager(rcmgr.NewFixedLimiter(limits.AutoScale()))
	if err != nil {
		return err
	}

	return cfg.Apply(ResourceManager(mgr))
}

var DefaultSecurity = ChainOptions(
	Security(noise.ID, noise.New),
	Security(tls.ID, tls.New),
)

DefaultSecurity is the default security option.

Useful when you want to extend, but not replace, the supported transport security protocols.

var DefaultTransports = ChainOptions(
	Transport(tcp.NewTCPTransport),
	Transport(quic.NewTransport),
	Transport(ws.New),
	Transport(webtransport.New),
)

DefaultTransports are the default dep2p transports.

Use this option when you want to *extend* the set of transports used by dep2p instead of replacing them.

var NoListenAddrs = func(cfg *Config) error {
	cfg.ListenAddrs = []ma.Multiaddr{}
	if !cfg.RelayCustom {
		cfg.RelayCustom = true
		cfg.Relay = false
	}
	return nil
}

NoListenAddrs will configure dep2p to not listen by default.

This will both clear any configured listen addrs and prevent dep2p from applying the default listen address option. It also disables relay, unless the user explicitly specifies with an option, as the transport creates an implicit listen address that would make the node dialable through any relay it was connected to.

var NoTransports = func(cfg *Config) error {
	cfg.Transports = []fx.Option{}
	return nil
}

NoTransports will configure dep2p to not enable any transports.

This will both clear any configured transports (specified in prior dep2p options) and prevent dep2p from applying the default transports.

var RandomIdentity = func(cfg *Config) error {
	priv, _, err := crypto.GenerateEd25519Key(rand.Reader)
	if err != nil {
		return err
	}
	return cfg.Apply(Identity(priv))
}

RandomIdentity generates a random identity. (default behaviour)

Functions

func New

func New(opts ...Option) (host.Host, error)

New constructs a new dep2p node with the given options, falling back on reasonable defaults. The defaults are:

- If no transport and listen addresses are provided, the node listens to the multiaddresses "/ip4/0.0.0.0/tcp/0" and "/ip6/::/tcp/0";

- If no transport options are provided, the node uses TCP, websocket and QUIC transport protocols;

- If no multiplexer configuration is provided, the node is configured by default to use yamux;

- If no security transport is provided, the host uses the dep2p's noise and/or tls encrypted transport to encrypt all traffic;

- If no peer identity is provided, it generates a random Ed25519 key-pair and derives a new identity from it;

- If no peerstore is provided, the host is initialized with an empty peerstore.

To stop/shutdown the returned dep2p node, the user needs to cancel the passed context and call `Close` on the returned Host.

func NewWithoutDefaults

func NewWithoutDefaults(opts ...Option) (host.Host, error)

NewWithoutDefaults constructs a new dep2p node with the given options but *without* falling back on reasonable defaults.

Warning: This function should not be considered a stable interface. We may choose to add required services at any time and, by using this function, you opt-out of any defaults we may provide.

func SetDefaultServiceLimits

func SetDefaultServiceLimits(config *rcmgr.ScalingLimitConfig)

SetDefaultServiceLimits sets the default limits for bundled dep2p services

Types

type Config

type Config = config.Config

Config describes a set of settings for a dep2p node.

type Option

type Option = config.Option

Option is a dep2p config option that can be given to the dep2p constructor (`dep2p.New`).

var DefaultPeerstore Option = func(cfg *Config) error {
	ps, err := pstoremem.NewPeerstore()
	if err != nil {
		return err
	}
	return cfg.Apply(Peerstore(ps))
}

DefaultPeerstore configures dep2p to use the default peerstore.

var Defaults Option = func(cfg *Config) error {
	for _, def := range defaults {
		if err := cfg.Apply(def.opt); err != nil {
			return err
		}
	}
	return nil
}

Defaults configures dep2p to use the default options. Can be combined with other options to *extend* the default options.

var FallbackDefaults Option = func(cfg *Config) error {
	for _, def := range defaults {
		if !def.fallback(cfg) {
			continue
		}
		if err := cfg.Apply(def.opt); err != nil {
			return err
		}
	}
	return nil
}

FallbackDefaults applies default options to the dep2p node if and only if no other relevant options have been applied. will be appended to the options passed into New.

var NoSecurity Option = func(cfg *Config) error {
	if len(cfg.SecurityTransports) > 0 {
		return fmt.Errorf("cannot use security transports with an insecure dep2p configuration")
	}
	cfg.Insecure = true
	return nil
}

NoSecurity is an option that completely disables all transport security. It's incompatible with all other transport security protocols.

func AddrsFactory

func AddrsFactory(factory config.AddrsFactory) Option

AddrsFactory configures dep2p to use the given address factory.

func AutoNATServiceRateLimit

func AutoNATServiceRateLimit(global, perPeer int, interval time.Duration) Option

AutoNATServiceRateLimit changes the default rate limiting configured in helping other peers determine their reachability status. When set, the host will limit the number of requests it responds to in each 60 second period to the set numbers. A value of '0' disables throttling.

func BandwidthReporter

func BandwidthReporter(rep metrics.Reporter) Option

BandwidthReporter configures dep2p to use the given bandwidth reporter.

func ChainOptions

func ChainOptions(opts ...Option) Option

ChainOptions chains multiple options into a single option.

func ConnectionGater

func ConnectionGater(cg connmgr.ConnectionGater) Option

ConnectionGater configures dep2p to use the given ConnectionGater to actively reject inbound/outbound connections based on the lifecycle stage of the connection.

For more information, refer to dep2p/core.ConnectionGater.

func ConnectionManager

func ConnectionManager(connman connmgr.ConnManager) Option

ConnectionManager configures dep2p to use the given connection manager.

func DialRanker

func DialRanker(d network.DialRanker) Option

DialRanker configures dep2p to use d as the dial ranker. To enable smart dialing use `swarm.DefaultDialRanker`. use `swarm.NoDelayDialRanker` to disable smart dialing.

Deprecated: use SwarmOpts(swarm.WithDialRanker(d)) instead

func DisableMetrics

func DisableMetrics() Option

DisableMetrics configures dep2p to disable prometheus metrics

func DisableRelay

func DisableRelay() Option

DisableRelay configures dep2p to disable the relay transport.

func EnableAutoRelay

func EnableAutoRelay(opts ...autorelay.Option) Option

EnableAutoRelay configures dep2p to enable the AutoRelay subsystem.

Dependencies:

• Relay (enabled by default)
• Either: 1. A list of static relays 2. A PeerSource function that provides a chan of relays. See `autorelay.WithPeerSource`

This subsystem performs automatic address rewriting to advertise relay addresses when it detects that the node is publicly unreachable (e.g. behind a NAT).

Deprecated: Use EnableAutoRelayWithStaticRelays or EnableAutoRelayWithPeerSource

func EnableAutoRelayWithPeerSource

func EnableAutoRelayWithPeerSource(peerSource autorelay.PeerSource, opts ...autorelay.Option) Option

EnableAutoRelayWithPeerSource configures dep2p to enable the AutoRelay subsystem using the provided PeerSource callback to get more relay candidates. This subsystem performs automatic address rewriting to advertise relay addresses when it detects that the node is publicly unreachable (e.g. behind a NAT).

func EnableAutoRelayWithStaticRelays

func EnableAutoRelayWithStaticRelays(static []peer.AddrInfo, opts ...autorelay.Option) Option

EnableAutoRelayWithStaticRelays configures dep2p to enable the AutoRelay subsystem using the provided relays as relay candidates. This subsystem performs automatic address rewriting to advertise relay addresses when it detects that the node is publicly unreachable (e.g. behind a NAT).

func EnableHolePunching

func EnableHolePunching(opts ...holepunch.Option) Option

Experimental EnableHolePunching enables NAT traversal by enabling NATT'd peers to both initiate and respond to hole punching attempts to create direct/NAT-traversed connections with other peers. (default: disabled)

Dependencies:

• Relay (enabled by default)

This subsystem performs two functions:

1. On receiving an inbound Relay connection, it attempts to create a direct connection with the remote peer by initiating and co-ordinating a hole punch over the Relayed connection.
2. If a peer sees a request to co-ordinate a hole punch on an outbound Relay connection, it will participate in the hole-punch to create a direct connection with the remote peer.

If the hole punch is successful, all new streams will thereafter be created on the hole-punched connection. The Relayed connection will eventually be closed after a grace period.

All existing indefinite long-lived streams on the Relayed connection will have to re-opened on the hole-punched connection by the user. Users can make use of the `Connected`/`Disconnected` notifications emitted by the Network for this purpose.

It is not mandatory but nice to also enable the `AutoRelay` option (See `EnableAutoRelay`) so the peer can discover and connect to Relay servers if it discovers that it is NATT'd and has private reachability via AutoNAT. This will then enable it to advertise Relay addresses which can be used to accept inbound Relay connections to then co-ordinate a hole punch.

If `EnableAutoRelay` is configured and the user is confident that the peer has private reachability/is NATT'd, the `ForceReachabilityPrivate` option can be configured to short-circuit reachability discovery via AutoNAT so the peer can immediately start connecting to Relay servers.

If `EnableAutoRelay` is configured, the `StaticRelays` option can be used to configure a static set of Relay servers for `AutoRelay` to connect to so that it does not need to discover Relay servers via Routing.

func EnableNATService

func EnableNATService() Option

EnableNATService configures dep2p to provide a service to peers for determining their reachability status. When enabled, the host will attempt to dial back to peers, and then tell them if it was successful in making such connections.

func EnableRelay

func EnableRelay() Option

EnableRelay configures dep2p to enable the relay transport. This option only configures dep2p to accept inbound connections from relays and make outbound connections_through_ relays when requested by the remote peer. This option supports both circuit v1 and v2 connections. (default: enabled)

func EnableRelayService

func EnableRelayService(opts ...relayv2.Option) Option

EnableRelayService configures dep2p to run a circuit v2 relay, if we detect that we're publicly reachable.

func ForceReachabilityPrivate

func ForceReachabilityPrivate() Option

ForceReachabilityPrivate overrides automatic reachability detection in the AutoNAT subsystem, forceing the local node to believe it is behind a NAT and not reachable externally.

func ForceReachabilityPublic

func ForceReachabilityPublic() Option

ForceReachabilityPublic overrides automatic reachability detection in the AutoNAT subsystem, forcing the local node to believe it is reachable externally.

func Identity

func Identity(sk crypto.PrivKey) Option

Identity configures dep2p to use the given private key to identify itself.

func ListenAddrStrings

func ListenAddrStrings(s ...string) Option

ListenAddrStrings configures dep2p to listen on the given (unparsed) addresses.

func ListenAddrs

func ListenAddrs(addrs ...ma.Multiaddr) Option

ListenAddrs configures dep2p to listen on the given addresses.

func MultiaddrResolver

func MultiaddrResolver(rslv *madns.Resolver) Option

MultiaddrResolver sets the dep2p dns resolver

func Muxer

func Muxer(name string, muxer network.Multiplexer) Option

Muxer configures dep2p to use the given stream multiplexer. name is the protocol name.

func NATManager

func NATManager(nm config.NATManagerC) Option

NATManager will configure dep2p to use the requested NATManager. This function should be passed a NATManager *constructor* that takes a dep2p Network.

func NATPortMap

func NATPortMap() Option

NATPortMap configures dep2p to use the default NATManager. The default NATManager will attempt to open a port in your network's firewall using UPnP.

func Peerstore

func Peerstore(ps peerstore.Peerstore) Option

Peerstore configures dep2p to use the given peerstore.

func Ping

func Ping(enable bool) Option

Ping will configure dep2p to support the ping service; enable by default.

func PrivateNetwork

func PrivateNetwork(psk pnet.PSK) Option

PrivateNetwork configures dep2p to use the given private network protector.

func PrometheusRegisterer

func PrometheusRegisterer(reg prometheus.Registerer) Option

PrometheusRegisterer configures dep2p to use reg as the Registerer for all metrics subsystems

func ProtocolVersion

func ProtocolVersion(s string) Option

ProtocolVersion sets the protocolVersion string required by the dep2p Identify protocol.

func QUICReuse

func QUICReuse(constructor interface{}, opts ...quicreuse.Option) Option

func ResourceManager

func ResourceManager(rcmgr network.ResourceManager) Option

ResourceManager configures dep2p to use the given ResourceManager. When using the p2p/host/resource-manager implementation of the ResourceManager interface, it is recommended to set limits for dep2p protocol by calling SetDefaultServiceLimits.

func Routing

func Routing(rt config.RoutingC) Option

Routing will configure dep2p to use routing.

func Security

func Security(name string, constructor interface{}) Option

Security configures dep2p to use the given security transport (or transport constructor).

Name is the protocol name.

The transport can be a constructed security.Transport or a function taking any subset of this dep2p node's: * Public key * Private key * Peer ID * Host * Network * Peerstore

func SwarmOpts

func SwarmOpts(opts ...swarm.Option) Option

SwarmOpts configures dep2p to use swarm with opts

func Transport

func Transport(constructor interface{}, opts ...interface{}) Option

Transport configures dep2p to use the given transport (or transport constructor).

The transport can be a constructed transport.Transport or a function taking any subset of this dep2p node's: * Transport Upgrader (*tptu.Upgrader) * Host * Stream muxer (muxer.Transport) * Security transport (security.Transport) * Private network protector (pnet.Protector) * Peer ID * Private Key * Public Key * Address filter (filter.Filter) * Peerstore

func UserAgent

func UserAgent(userAgent string) Option

UserAgent sets the dep2p user-agent sent along with the identify protocol

func WithDialTimeout

func WithDialTimeout(t time.Duration) Option