p2p

package
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 Go to latest Published: Aug 6, 2021 License: MIT Imports: 29 Imported by: 0

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Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrDuplicatePeer     = errors.New("Duplicate peer")
	ErrConnectSelf       = errors.New("Connect self")
	ErrConnectBannedPeer = errors.New("Connect banned peer")
	ErrConnectBannedIP   = errors.New("Connect banned ip")
	ErrConnectSpvPeer    = errors.New("Outbound connect spv peer")
)

pre-define errors for connecting fail

View Source 
var PanicOnAddPeerErr = false

PanicOnAddPeerErr add peer error

Functions

func Connect2Switches 

func Connect2Switches(switches []*Switch, i, j int)

Connect2Switches will connect switches i and j via net.Pipe() Blocks until a conection is established. NOTE: caller ensures i and j are within bounds

Types

type BaseReactor 

type BaseReactor struct {
	cmn.BaseService // Provides Start, Stop, .Quit
	Switch          *Switch
}

BaseReactor base service of a reactor

func NewBaseReactor 

func NewBaseReactor(name string, impl Reactor) *BaseReactor

NewBaseReactor create new base Reactor

func (*BaseReactor) AddPeer 

func (*BaseReactor) AddPeer(peer *Peer)

AddPeer is called by the switch when a new peer is added

func (*BaseReactor) GetChannels 

func (*BaseReactor) GetChannels() []*connection.ChannelDescriptor

GetChannels returns the list of channel descriptors

func (*BaseReactor) Receive 

func (*BaseReactor) Receive(chID byte, peer *Peer, msgBytes []byte)

Receive is called when msgBytes is received from peer

func (*BaseReactor) RemovePeer 

func (*BaseReactor) RemovePeer(peer *Peer, reason interface{})

RemovePeer is called by the switch when the peer is stopped (due to error or other reason)

func (*BaseReactor) SetSwitch 

func (br *BaseReactor) SetSwitch(sw *Switch)

SetSwitch setting a switch for reactor

type DefaultListener 

type DefaultListener struct {
	cmn.BaseService
	// contains filtered or unexported fields
}

DefaultListener Implements mass server Listener

func (*DefaultListener) Connections 

func (l *DefaultListener) Connections() <-chan net.Conn

Connections a channel of inbound connections. It gets closed when the listener closes.

func (*DefaultListener) ExternalAddress 

func (l *DefaultListener) ExternalAddress() *NetAddress

ExternalAddress listener external address for remote peer dial

func (*DefaultListener) InternalAddress 

func (l *DefaultListener) InternalAddress() *NetAddress

InternalAddress listener internal address

func (*DefaultListener) NetListener 

func (l *DefaultListener) NetListener() net.Listener

NetListener the returned listener is already Accept()'ing. So it's not suitable to pass into http.Serve().

func (*DefaultListener) OnStart 

func (l *DefaultListener) OnStart() error

OnStart start listener

func (*DefaultListener) OnStop 

func (l *DefaultListener) OnStop()

OnStop stop listener

func (*DefaultListener) String 

func (l *DefaultListener) String() string

String string of default listener

type IPResult 

type IPResult struct {
	Success bool
	IP      string
}

IPResult is the ip check response

func GetIP 

func GetIP() *IPResult

GetIP return the ip of the current host

type IPeerSet 

type IPeerSet interface {
	Has(key string) bool
	Get(key string) *Peer
	List() []*Peer
	Size() int
}

IPeerSet has a (immutable) subset of the methods of PeerSet.

type Listener 

type Listener interface {
	Connections() <-chan net.Conn
	InternalAddress() *NetAddress
	ExternalAddress() *NetAddress
	String() string
	Stop() bool
}

Listener subset of the methods of DefaultListener

func NewDefaultListener 

func NewDefaultListener(cfg *config.Config) (Listener, bool)

NewDefaultListener create a default listener

type NetAddress 

type NetAddress struct {
	IP   net.IP
	Port uint16
	// contains filtered or unexported fields
}

NetAddress defines information about a peer on the network including its IP address, and port.

func CreateRoutableAddr 

func CreateRoutableAddr() (addr string, netAddr *NetAddress)

func NewNetAddress 

func NewNetAddress(addr net.Addr) *NetAddress

NewNetAddress returns a new NetAddress using the provided TCP address. When testing, other net.Addr (except TCP) will result in using 0.0.0.0:0. When normal run, other net.Addr (except TCP) will panic. TODO: socks proxies?

func NewNetAddressIPPort 

func NewNetAddressIPPort(ip net.IP, port uint16) *NetAddress

NewNetAddressIPPort returns a new NetAddress using the provided IP and port number.

func NewNetAddressString 

func NewNetAddressString(addr string) (*NetAddress, error)

NewNetAddressString returns a new NetAddress using the provided address in the form of "IP:Port". Also resolves the host if host is not an IP.

func NewNetAddressStrings 

func NewNetAddressStrings(addrs []string) ([]*NetAddress, error)

NewNetAddressStrings returns an array of NetAddress'es build using the provided strings.

func (*NetAddress) Dial 

func (na *NetAddress) Dial() (net.Conn, error)

Dial calls net.Dial on the address.

func (*NetAddress) DialString 

func (na *NetAddress) DialString() string

DialString dial address string representation

func (*NetAddress) DialTimeout 

func (na *NetAddress) DialTimeout(timeout time.Duration) (net.Conn, error)

DialTimeout calls net.DialTimeout on the address.

func (*NetAddress) Equals 

func (na *NetAddress) Equals(other interface{}) bool

Equals reports whether na and other are the same addresses.

func (*NetAddress) Local 

func (na *NetAddress) Local() bool

Local returns true if it is a local address.

func (*NetAddress) RFC1918 

func (na *NetAddress) RFC1918() bool

RFC1918 IPv4 Private networks (10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12)

func (*NetAddress) RFC3849 

func (na *NetAddress) RFC3849() bool

RFC3849 IPv6 Documentation address (2001:0DB8::/32)

func (*NetAddress) RFC3927 

func (na *NetAddress) RFC3927() bool

RFC3927 IPv4 Autoconfig (169.254.0.0/16)

func (*NetAddress) RFC3964 

func (na *NetAddress) RFC3964() bool

RFC3964 IPv6 6to4 (2002::/16)

func (*NetAddress) RFC4193 

func (na *NetAddress) RFC4193() bool

RFC4193 IPv6 unique local (FC00::/7)

func (*NetAddress) RFC4380 

func (na *NetAddress) RFC4380() bool

RFC4380 IPv6 Teredo tunneling (2001::/32)

func (*NetAddress) RFC4843 

func (na *NetAddress) RFC4843() bool

RFC4843 IPv6 ORCHID: (2001:10::/28)

func (*NetAddress) RFC4862 

func (na *NetAddress) RFC4862() bool

RFC4862 IPv6 Autoconfig (FE80::/64)

func (*NetAddress) RFC6052 

func (na *NetAddress) RFC6052() bool

RFC6052 IPv6 well known prefix (64:FF9B::/96)

func (*NetAddress) RFC6145 

func (na *NetAddress) RFC6145() bool

RFC6145 IPv6 IPv4 translated address ::FFFF:0:0:0/96

func (*NetAddress) ReachabilityTo 

func (na *NetAddress) ReachabilityTo(o *NetAddress) int

ReachabilityTo checks whenever o can be reached from na.

func (*NetAddress) Routable 

func (na *NetAddress) Routable() bool

Routable returns true if the address is routable.

func (*NetAddress) String 

func (na *NetAddress) String() string

String representation.

func (*NetAddress) Valid 

func (na *NetAddress) Valid() bool

Valid For IPv4 these are either a 0 or all bits set address. For IPv6 a zero address or one that matches the RFC3849 documentation address format.

type NodeInfo 

type NodeInfo struct {
	PubKey     crypto.PubKeyEd25519 `json:"pub_key"`
	Moniker    string               `json:"moniker"`
	Network    string               `json:"network"`
	RemoteAddr string               `json:"remote_addr"`
	ListenAddr string               `json:"listen_addr"`
	Version    string               `json:"version"` // major.minor.revision
	Other      []string             `json:"other"`   // other application specific data
}

NodeInfo peer node info

func (*NodeInfo) CompatibleWith 

func (info *NodeInfo) CompatibleWith(other *NodeInfo) error

CompatibleWith checks if two NodeInfo are compatible with each other.

func (*NodeInfo) ListenHost 

func (info *NodeInfo) ListenHost() string

ListenHost peer listener ip address

func (*NodeInfo) ListenPort 

func (info *NodeInfo) ListenPort() int

ListenPort peer listener port

func (*NodeInfo) RemoteAddrHost 

func (info *NodeInfo) RemoteAddrHost() string

RemoteAddrHost peer external ip address

func (NodeInfo) String 

func (info NodeInfo) String() string

String representation

type Peer 

type Peer struct {
	cmn.BaseService
	*NodeInfo

	Key string
	// contains filtered or unexported fields
}

Peer represent a mass network node

func CreateRandomPeer 

func CreateRandomPeer(outbound bool) *Peer

func (*Peer) Addr 

func (p *Peer) Addr() net.Addr

Addr returns peer's remote network address.

func (*Peer) CanSend 

func (p *Peer) CanSend(chID byte) bool

CanSend returns true if the send queue is not full, false otherwise.

func (Peer) CloseConn 

func (pc Peer) CloseConn()

CloseConn should be used when the peer was created, but never started.

func (*Peer) Equals 

func (p *Peer) Equals(other *Peer) bool

Equals reports whenever 2 peers are actually represent the same node.

func (Peer) HandshakeTimeout 

func (pc Peer) HandshakeTimeout(ourNodeInfo *NodeInfo, timeout time.Duration) (*NodeInfo, error)

HandshakeTimeout performs a handshake between a given node and the peer. NOTE: blocking

func (*Peer) ID 

func (p *Peer) ID() string

func (*Peer) IsOutbound 

func (p *Peer) IsOutbound() bool

IsOutbound returns true if the connection is outbound, false otherwise.

func (*Peer) IsTrustworthy 

func (p *Peer) IsTrustworthy() bool

func (*Peer) OnStart 

func (p *Peer) OnStart() error

OnStart implements BaseService.

func (*Peer) OnStop 

func (p *Peer) OnStop()

OnStop implements BaseService.

func (*Peer) PubKey 

func (p *Peer) PubKey() gocrypto.PubKeyEd25519

PubKey returns peer's public key.

func (*Peer) Send 

func (p *Peer) Send(chID byte, msg interface{}) bool

Send msg to the channel identified by chID byte. Returns false if the send queue is full after timeout, specified by MConnection.

func (*Peer) ServiceFlag 

func (p *Peer) ServiceFlag() consensus.ServiceFlag

func (*Peer) String 

func (p *Peer) String() string

String representation.

func (*Peer) TrySend 

func (p *Peer) TrySend(chID byte, msg interface{}) bool

TrySend msg to the channel identified by chID byte. Immediately returns false if the send queue is full.

type PeerConfig 

type PeerConfig struct {
	HandshakeTimeout time.Duration           `mapstructure:"handshake_timeout"` // times are in seconds
	DialTimeout      time.Duration           `mapstructure:"dial_timeout"`
	MConfig          *connection.MConnConfig `mapstructure:"connection"`
}

PeerConfig is a Peer configuration.

func DefaultPeerConfig 

func DefaultPeerConfig(config *config.Config) *PeerConfig

DefaultPeerConfig returns the default config.

type PeerSet 

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

PeerSet is a special structure for keeping a table of peers. Iteration over the peers is super fast and thread-safe.

func NewPeerSet 

func NewPeerSet() *PeerSet

NewPeerSet creates a new peerSet with a list of initial capacity of 256 items.

func (*PeerSet) Add 

func (ps *PeerSet) Add(peer *Peer) error

Add adds the peer to the PeerSet. Returns false if peer with key (PubKeyEd25519) is already set

func (*PeerSet) Get 

func (ps *PeerSet) Get(peerKey string) *Peer

Get looks up a peer by the provided peerKey.

func (*PeerSet) Has 

func (ps *PeerSet) Has(peerKey string) bool

Has returns true if the PeerSet contains the peer referred to by this peerKey.

func (*PeerSet) List 

func (ps *PeerSet) List() []*Peer

List threadsafe list of peers.

func (*PeerSet) Remove 

func (ps *PeerSet) Remove(peer *Peer)

Remove discards peer if the peer was previously memoized.

func (*PeerSet) Size 

func (ps *PeerSet) Size() int

Size returns the number of unique items in the peerSet.

type Reactor 

type Reactor interface {
	cmn.Service // Start, Stop

	// SetSwitch allows setting a switch.
	SetSwitch(*Switch)

	// GetChannels returns the list of channel descriptors.
	GetChannels() []*connection.ChannelDescriptor

	// AddPeer is called by the switch when a new peer is added.
	AddPeer(peer *Peer) error

	// RemovePeer is called by the switch when the peer is stopped (due to error
	// or other reason).
	RemovePeer(peer *Peer, reason interface{})

	// Receive is called when msgBytes is received from peer.
	//
	// NOTE reactor can not keep msgBytes around after Receive completes without
	// copying.
	//
	// CONTRACT: msgBytes are not nil.
	Receive(chID byte, peer *Peer, msgBytes []byte)
}

Reactor is responsible for handling incoming messages of one or more `Channels`

type Switch 

type Switch struct {
	cmn.BaseService
	// contains filtered or unexported fields
}

Switch handles peer connections and exposes an API to receive incoming messages on `Reactors`. Each `Reactor` is responsible for handling incoming messages of one or more `Channels`. So while sending outgoing messages is typically performed on the peer, incoming messages are received on the reactor.

func MakeConnectedSwitches 

func MakeConnectedSwitches(cfg *config.Config, n int, initSwitch func(int, *Switch) *Switch, connect func([]*Switch, int, int)) []*Switch

MakeConnectedSwitches switches connected via arbitrary net.Conn; useful for testing Returns n switches, connected according to the connect func. If connect==Connect2Switches, the switches will be fully connected. initSwitch defines how the ith switch should be initialized (ie. with what reactors). NOTE: panics if any switch fails to start.

func MakeSwitch 

func MakeSwitch(cfg *config.Config, i int, network, version string, initSwitch func(int, *Switch) *Switch) (*Switch, error)

func NewSwitch 

func NewSwitch(conf *config.Config) (*Switch, error)

NewSwitch creates a new Switch with the given config.

func (*Switch) AddBannedPeer 

func (sw *Switch) AddBannedPeer(peerID, ip string) error

AddBannedPeer add peer to blacklist

func (*Switch) AddListener 

func (sw *Switch) AddListener(l Listener)

AddListener adds the given listener to the switch for listening to incoming peer connections. NOTE: Not goroutine safe.

func (*Switch) AddPeer 

func (sw *Switch) AddPeer(pc *peerConn) error

AddPeer performs the P2P handshake with a peer that already has a SecretConnection. If all goes well, it starts the peer and adds it to the switch. NOTE: This performs a blocking handshake before the peer is added. CONTRACT: If error is returned, peer is nil, and conn is immediately closed.

func (*Switch) AddReactor 

func (sw *Switch) AddReactor(name string, reactor Reactor) Reactor

AddReactor adds the given reactor to the switch. NOTE: Not goroutine safe.

func (*Switch) DialPeerWithAddress 

func (sw *Switch) DialPeerWithAddress(addr *NetAddress) error

DialPeerWithAddress dial node from net address

func (*Switch) IsDialing 

func (sw *Switch) IsDialing(addr *NetAddress) bool

IsDialing prevent duplicate dialing

func (*Switch) IsListening 

func (sw *Switch) IsListening() bool

IsListening returns true if the switch has at least one listener. NOTE: Not goroutine safe.

func (*Switch) Listeners 

func (sw *Switch) Listeners() []Listener

Listeners returns the list of listeners the switch listens on. NOTE: Not goroutine safe.

func (*Switch) NodeInfo 

func (sw *Switch) NodeInfo() *NodeInfo

NodeInfo returns the switch's NodeInfo. NOTE: Not goroutine safe.

func (*Switch) NumPeers 

func (sw *Switch) NumPeers() (outbound, inbound, dialing int)

NumPeers Returns the count of outbound/inbound and outbound-dialing peers.

func (*Switch) OnStart 

func (sw *Switch) OnStart() error

OnStart implements BaseService. It starts all the reactors, peers, and listeners.

func (*Switch) OnStop 

func (sw *Switch) OnStop()

OnStop implements BaseService. It stops all listeners, peers, and reactors.

func (*Switch) Peers 

func (sw *Switch) Peers() *PeerSet

Peers return switch peerset

func (*Switch) SetNodeInfo 

func (sw *Switch) SetNodeInfo(nodeInfo *NodeInfo)

SetNodeInfo sets the switch's NodeInfo for checking compatibility and handshaking with other nodes. NOTE: Not goroutine safe.

func (*Switch) SetNodePrivKey 

func (sw *Switch) SetNodePrivKey(nodePrivKey crypto.PrivKeyEd25519)

SetNodePrivKey sets the switch's private key for authenticated encryption. NOTE: Not goroutine safe.

func (*Switch) StopPeerForError 

func (sw *Switch) StopPeerForError(peer *Peer, reason interface{})

StopPeerForError disconnects from a peer due to external error.

func (*Switch) StopPeerGracefully 

func (sw *Switch) StopPeerGracefully(peerID string)

StopPeerGracefully disconnect from a peer gracefully.

Source Files

View all Source files

Directories

Path Synopsis
Package discv5 implements the RLPx v5 Topic Discovery Protocol.
 Package discv5 implements the RLPx v5 Topic Discovery Protocol.
Package netutil contains extensions to the net package.
 Package netutil contains extensions to the net package.
Taken from taipei-torrent Just enough UPnP to be able to forward ports
 Taken from taipei-torrent Just enough UPnP to be able to forward ports

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