141 lines
3.9 KiB
Go
141 lines
3.9 KiB
Go
package libp2p
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// This file contains all the default configuration options.
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import (
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"crypto/rand"
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crypto "github.com/libp2p/go-libp2p-core/crypto"
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mplex "github.com/libp2p/go-libp2p-mplex"
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pstoremem "github.com/libp2p/go-libp2p-peerstore/pstoremem"
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secio "github.com/libp2p/go-libp2p-secio"
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yamux "github.com/libp2p/go-libp2p-yamux"
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tcp "github.com/libp2p/go-tcp-transport"
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ws "github.com/libp2p/go-ws-transport"
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multiaddr "github.com/multiformats/go-multiaddr"
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)
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// DefaultSecurity is the default security option.
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//
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// Useful when you want to extend, but not replace, the supported transport
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// security protocols.
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var DefaultSecurity = Security(secio.ID, secio.New)
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// DefaultMuxers configures libp2p to use the stream connection multiplexers.
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//
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// Use this option when you want to *extend* the set of multiplexers used by
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// libp2p instead of replacing them.
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var DefaultMuxers = ChainOptions(
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Muxer("/yamux/1.0.0", yamux.DefaultTransport),
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Muxer("/mplex/6.7.0", mplex.DefaultTransport),
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)
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// DefaultTransports are the default libp2p transports.
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//
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// Use this option when you want to *extend* the set of transports used by
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// libp2p instead of replacing them.
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var DefaultTransports = ChainOptions(
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Transport(tcp.NewTCPTransport),
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Transport(ws.New),
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)
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// DefaultPeerstore configures libp2p to use the default peerstore.
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var DefaultPeerstore Option = func(cfg *Config) error {
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return cfg.Apply(Peerstore(pstoremem.NewPeerstore()))
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}
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// RandomIdentity generates a random identity (default behaviour)
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var RandomIdentity = func(cfg *Config) error {
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priv, _, err := crypto.GenerateKeyPairWithReader(crypto.RSA, 2048, rand.Reader)
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if err != nil {
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return err
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}
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return cfg.Apply(Identity(priv))
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}
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// DefaultListenAddrs configures libp2p to use default listen address
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var DefaultListenAddrs = func(cfg *Config) error {
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defaultIP4ListenAddr, err := multiaddr.NewMultiaddr("/ip4/0.0.0.0/tcp/0")
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if err != nil {
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return err
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}
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defaultIP6ListenAddr, err := multiaddr.NewMultiaddr("/ip6/::/tcp/0")
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if err != nil {
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return err
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}
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return cfg.Apply(ListenAddrs(
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defaultIP4ListenAddr,
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defaultIP6ListenAddr,
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))
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}
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// DefaultEnableRelay enables relay dialing and listening by default
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var DefaultEnableRelay = func(cfg *Config) error {
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return cfg.Apply(EnableRelay())
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}
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// Complete list of default options and when to fallback on them.
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//
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// Please *DON'T* specify default options any other way. Putting this all here
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// makes tracking defaults *much* easier.
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var defaults = []struct {
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fallback func(cfg *Config) bool
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opt Option
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}{
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{
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fallback: func(cfg *Config) bool { return cfg.Transports == nil && cfg.ListenAddrs == nil },
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opt: DefaultListenAddrs,
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},
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{
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fallback: func(cfg *Config) bool { return cfg.Transports == nil },
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opt: DefaultTransports,
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},
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{
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fallback: func(cfg *Config) bool { return cfg.Muxers == nil },
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opt: DefaultMuxers,
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},
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{
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fallback: func(cfg *Config) bool { return !cfg.Insecure && cfg.SecurityTransports == nil },
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opt: DefaultSecurity,
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},
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{
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fallback: func(cfg *Config) bool { return cfg.PeerKey == nil },
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opt: RandomIdentity,
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},
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{
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fallback: func(cfg *Config) bool { return cfg.Peerstore == nil },
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opt: DefaultPeerstore,
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},
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{
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fallback: func(cfg *Config) bool { return !cfg.RelayCustom },
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opt: DefaultEnableRelay,
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},
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}
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// Defaults configures libp2p to use the default options. Can be combined with
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// other options to *extend* the default options.
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var Defaults Option = func(cfg *Config) error {
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for _, def := range defaults {
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if err := cfg.Apply(def.opt); err != nil {
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return err
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}
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}
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return nil
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}
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// FallbackDefaults applies default options to the libp2p node if and only if no
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// other relevent options have been applied. will be appended to the options
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// passed into New.
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var FallbackDefaults Option = func(cfg *Config) error {
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for _, def := range defaults {
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if !def.fallback(cfg) {
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continue
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}
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if err := cfg.Apply(def.opt); err != nil {
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return err
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}
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}
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return nil
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}
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