tp2p

package
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 Go to latest Published: Jul 31, 2020 License: GPL-3.0 Imports: 20 Imported by: 4

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Index

Constants

View Source 
const (

	// keep at least this many outbound peers
	// TODO: move to config
	DefaultMinNumOutboundPeers = 10
)
View Source 
const IDByteLength = 20

IDByteLength is the length of a crypto.Address. Currently only 20. TODO: support other length addresses ?

Variables

This section is empty.

Functions

func IDAddressString 

func IDAddressString(id ID, hostPort string) string

IDAddressString returns id@hostPort.

func MaxNodeInfoSize 

func MaxNodeInfoSize() int

Max size of the NodeInfo struct

func SplitHostPort 

func SplitHostPort(addr string) (host string, port int)

Types

type AddrBook 

type AddrBook interface {
	AddAddress(addr *NetAddress, src *NetAddress) error
	AddOurAddress(*NetAddress)
	OurAddress(*NetAddress) bool
	MarkGood(*NetAddress)
	RemoveAddress(*NetAddress)
	HasAddress(*NetAddress) bool
	Save()
}

An AddrBook represents an address book from the pex package, which is used to store peer addresses.

type BaseReactor 

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

func NewBaseReactor 

func NewBaseReactor(name string, impl Reactor) *BaseReactor

func (*BaseReactor) AddPeer 

func (*BaseReactor) AddPeer(peer Peer)

func (*BaseReactor) GetChannels 

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

func (*BaseReactor) Receive 

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

func (*BaseReactor) RemovePeer 

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

func (*BaseReactor) SetSwitch 

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

type ChannelDescriptor 

type ChannelDescriptor = conn.ChannelDescriptor

type ConnectionStatus 

type ConnectionStatus = conn.ConnectionStatus

type DefaultListener 

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

DefaultListener is a help.Service, running net.Listener underneath. Optionally, UPnP is used upon calling NewDefaultListener to resolve external address.

func (*DefaultListener) Connections 

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

Connections returns a channel of inbound connections. It gets closed when the listener closes. It is the callers responsibility to close any connections received over this channel.

func (*DefaultListener) ExternalAddress 

func (l *DefaultListener) ExternalAddress() *NetAddress

ExternalAddress returns the external NetAddress (publicly available, determined using either UPnP or local resolver).

func (*DefaultListener) ExternalAddressHost 

func (l *DefaultListener) ExternalAddressHost() string

ExternalAddressHost returns the external NetAddress IP string. If an IP is IPv6, it's wrapped in brackets ("[2001:db8:1f70::999:de8:7648:6e8]").

func (*DefaultListener) InternalAddress 

func (l *DefaultListener) InternalAddress() *NetAddress

InternalAddress returns the internal NetAddress (address used for listening).

func (*DefaultListener) OnStart 

func (l *DefaultListener) OnStart() error

OnStart implements help.Service by spinning a goroutine, listening for new connections.

func (*DefaultListener) OnStop 

func (l *DefaultListener) OnStop()

OnStop implements help.Service by closing the listener.

func (*DefaultListener) String 

func (l *DefaultListener) String() string

type ErrNetAddressInvalid 

type ErrNetAddressInvalid struct {
	Addr string
	Err  error
}

func (ErrNetAddressInvalid) Error 

func (e ErrNetAddressInvalid) Error() string

type ErrNetAddressLookup 

type ErrNetAddressLookup struct {
	Addr string
	Err  error
}

func (ErrNetAddressLookup) Error 

func (e ErrNetAddressLookup) Error() string

type ErrNetAddressNoID 

type ErrNetAddressNoID struct {
	Addr string
}

func (ErrNetAddressNoID) Error 

func (e ErrNetAddressNoID) Error() string

type ErrSwitchAuthenticationFailure 

type ErrSwitchAuthenticationFailure struct {
	Dialed *NetAddress
	Got    ID
}

func (ErrSwitchAuthenticationFailure) Error 

func (e ErrSwitchAuthenticationFailure) Error() string

type ErrSwitchConnectToSelf 

type ErrSwitchConnectToSelf struct {
	Addr *NetAddress
}

ErrSwitchConnectToSelf to be raised when trying to connect to itself.

func (ErrSwitchConnectToSelf) Error 

func (e ErrSwitchConnectToSelf) Error() string

type ErrSwitchDuplicatePeerID 

type ErrSwitchDuplicatePeerID struct {
	ID ID
}

ErrSwitchDuplicatePeerID to be raised when a peer is connecting with a known ID.

func (ErrSwitchDuplicatePeerID) Error 

func (e ErrSwitchDuplicatePeerID) Error() string

type ErrSwitchDuplicatePeerIP 

type ErrSwitchDuplicatePeerIP struct {
	IP net.IP
}

ErrSwitchDuplicatePeerIP to be raised whena a peer is connecting with a known IP.

func (ErrSwitchDuplicatePeerIP) Error 

func (e ErrSwitchDuplicatePeerIP) Error() string

type ID 

type ID string

ID is a hex-encoded crypto.Address

func PubKeyToID 

func PubKeyToID(pubKey crypto.PubKey) ID

PubKeyToID returns the ID corresponding to the given PubKey. It's the hex-encoding of the pubKey.Address(). func PubKeyToID(pubKey crypto.PubKey) ID { func PubKeyToID(pubKey crypto.PubKey) ID {

type IPeerSet 

type IPeerSet interface {
	Has(key ID) bool
	HasIP(ip net.IP) bool
	Get(key ID) 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
	ExternalAddressHost() string
	String() string
	Stop() error
}

Listener is a network listener for stream-oriented protocols, providing convenient methods to get listener's internal and external addresses. Clients are supposed to read incoming connections from a channel, returned by Connections() method.

func NewDefaultListener 

func NewDefaultListener(
	fullListenAddrString string,
	externalAddrString string,
	useUPnP bool,
	logger log.Logger) Listener

NewDefaultListener creates a new DefaultListener on lAddr, optionally trying to determine external address using UPnP.

type NetAddress 

type NetAddress struct {
	ID   ID     `json:"id"`
	IP   net.IP `json:"ip"`
	Port uint16 `json:"port"`
	// contains filtered or unexported fields
}

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

func NewNetAddress 

func NewNetAddress(id ID, 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 "ID@IP:Port". Also resolves the host if host is not an IP. Errors are of type ErrNetAddressXxx where Xxx is in (NoID, Invalid, Lookup)

func NewNetAddressStringWithOptionalID 

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

NewNetAddressStringWithOptionalID returns a new NetAddress using the provided address in the form of "ID@IP:Port", where the ID is optional. 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

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, including their ID, IP, and Port.

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

func (*NetAddress) RFC3849 

func (na *NetAddress) RFC3849() bool

func (*NetAddress) RFC3927 

func (na *NetAddress) RFC3927() bool

func (*NetAddress) RFC3964 

func (na *NetAddress) RFC3964() bool

func (*NetAddress) RFC4193 

func (na *NetAddress) RFC4193() bool

func (*NetAddress) RFC4380 

func (na *NetAddress) RFC4380() bool

func (*NetAddress) RFC4843 

func (na *NetAddress) RFC4843() bool

func (*NetAddress) RFC4862 

func (na *NetAddress) RFC4862() bool

func (*NetAddress) RFC6052 

func (na *NetAddress) RFC6052() bool

func (*NetAddress) RFC6145 

func (na *NetAddress) RFC6145() bool

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) Same 

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

Same returns true is na has the same non-empty ID or DialString as other.

func (*NetAddress) String 

func (na *NetAddress) String() string

String representation: <ID>@<IP>:<PORT>

func (*NetAddress) Valid 

func (na *NetAddress) Valid() bool

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 {
	// Authenticate
	// TODO: replace with NetAddress
	ID         ID     `json:"id"`          // authenticated identifier
	ListenAddr string `json:"listen_addr"` // accepting incoming

	// Check compatibility.
	// Channels are HexBytes so easier to read as JSON
	Network  string        `json:"network"`  // network/chain ID
	Version  string        `json:"version"`  // major.minor.revision
	Channels help.HexBytes `json:"channels"` // channels this node knows about

	// ASCIIText fields
	Moniker string   `json:"moniker"` // arbitrary moniker
	Other   []string `json:"other"`   // other application specific data
}

NodeInfo is the basic node information exchanged between two peers during the taiyuechain P2P handshake.

func (NodeInfo) CompatibleWith 

func (info NodeInfo) CompatibleWith(other NodeInfo) error

CompatibleWith checks if two NodeInfo are compatible with eachother. CONTRACT: two nodes are compatible if the major version matches and network match and they have at least one channel in common.

func (NodeInfo) NetAddress 

func (info NodeInfo) NetAddress() *NetAddress

NetAddress returns a NetAddress derived from the NodeInfo - it includes the authenticated peer ID and the self-reported ListenAddr. Note that the ListenAddr is not authenticated and may not match that address actually dialed if its an outbound peer.

func (NodeInfo) String 

func (info NodeInfo) String() string

func (NodeInfo) Validate 

func (info NodeInfo) Validate() error

Validate checks the self-reported NodeInfo is safe. It returns an error if there are too many Channels, if there are any duplicate Channels, if the ListenAddr is malformed, or if the ListenAddr is a host name that can not be resolved to some IP. TODO: constraints for Moniker/Other? Or is that for the UI ? JAE: It needs to be done on the client, but to prevent ambiguous unicode characters, maybe it's worth sanitizing it here. In the future we might want to validate these, once we have a name-resolution system up. International clients could then use punycode (or we could use url-encoding), and we just need to be careful with how we handle that in our clients. (e.g. off by default).

type NodeKey 

type NodeKey struct {
	PrivKey crypto.PrivKey `json:"priv_key"` // our priv key
}

NodeKey is the persistent peer key. It contains the nodes private key for authentication.

func (*NodeKey) ID 

func (nodeKey *NodeKey) ID() ID

ID returns the peer's canonical ID - the hash of its public key.

func (*NodeKey) PubKey 

func (nodeKey *NodeKey) PubKey() crypto.PubKey

PubKey returns the peer's PubKey func (nodeKey *NodeKey) PubKey() crypto.PubKey {

type Peer 

type Peer interface {
	help.Service

	ID() ID             // peer's cryptographic ID
	RemoteIP() net.IP   // remote IP of the connection
	IsOutbound() bool   // did we dial the peer
	IsPersistent() bool // do we redial this peer when we disconnect
	NodeInfo() NodeInfo // peer's info
	Status() tmconn.ConnectionStatus
	OriginalAddr() *NetAddress

	Send(byte, []byte) bool
	TrySend(byte, []byte) bool

	Set(string, interface{})
	Get(string) interface{}
}

Peer is an interface representing a peer connected on a reactor.

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. It returns an error carrying the reason, if the peer is already present.

func (*PeerSet) Get 

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

Get looks up a peer by the provided peerKey. Returns nil if peer is not found.

func (*PeerSet) Has 

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

Has returns true if the set contains the peer referred to by this peerKey, otherwise false.

func (*PeerSet) HasIP 

func (ps *PeerSet) HasIP(peerIP net.IP) bool

HasIP returns true if the set contains the peer referred to by this IP address, otherwise false.

func (*PeerSet) List 

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

List returns the threadsafe list of peers.

func (*PeerSet) Remove 

func (ps *PeerSet) Remove(peer Peer)

Remove discards peer by its Key, 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 {
	help.Service // Start, Stop

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

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

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

	// 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)
}

type Switch 

type Switch struct {
	help.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 NewSwitch 

func NewSwitch(cfg *config.P2PConfig, hasPeer help.PeerInValidators, options ...SwitchOption) *Switch

NewSwitch creates a new Switch with the given config.

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) AddReactor 

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

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

func (*Switch) Broadcast 

func (sw *Switch) Broadcast(chID byte, msgBytes []byte) chan bool

Broadcast runs a go routine for each attempted send, which will block trying to send for defaultSendTimeoutSeconds. Returns a channel which receives success values for each attempted send (false if times out). Channel will be closed once msg bytes are sent to all peers (or time out).

NOTE: Broadcast uses goroutines, so order of broadcast may not be preserved.

func (*Switch) DialPeerWithAddress 

func (sw *Switch) DialPeerWithAddress(addr *NetAddress, persistent bool) error

DialPeerWithAddress dials the given peer and runs sw.addPeer if it connects and authenticates successfully. If `persistent == true`, the switch will always try to reconnect to this peer if the connection ever fails.

func (*Switch) DialPeersAsync 

func (sw *Switch) DialPeersAsync(addrBook AddrBook, peers []string, persistent bool) error

DialPeersAsync dials a list of peers asynchronously in random order (optionally, making them persistent). Used to dial peers from config on startup or from unsafe-RPC (trusted sources). TODO: remove addrBook arg since it's now set on the switch

func (*Switch) FilterConnByAddr 

func (sw *Switch) FilterConnByAddr(addr net.Addr) error

FilterConnByAddr returns an error if connecting to the given address is forbidden.

func (*Switch) FilterConnByID 

func (sw *Switch) FilterConnByID(id ID) error

FilterConnByID returns an error if connecting to the given peer ID is forbidden.

func (*Switch) GetPeerForID 

func (sw *Switch) GetPeerForID(id string) Peer

func (*Switch) IsDialing 

func (sw *Switch) IsDialing(id ID) bool

IsDialing returns true if the switch is currently dialing the given ID.

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) MarkPeerAsGood 

func (sw *Switch) MarkPeerAsGood(peer Peer)

MarkPeerAsGood marks the given peer as good when it did something useful like contributed to consensus.

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() IPeerSet

Peers returns the set of peers that are connected to the switch.

func (*Switch) Reactor 

func (sw *Switch) Reactor(name string) Reactor

Reactor returns the reactor with the given name. NOTE: Not goroutine safe.

func (*Switch) Reactors 

func (sw *Switch) Reactors() map[string]Reactor

Reactors returns a map of reactors registered on the switch. NOTE: Not goroutine safe.

func (*Switch) ReadPeerList 

func (sw *Switch) ReadPeerList()

func (*Switch) SetAddrBook 

func (sw *Switch) SetAddrBook(addrBook AddrBook)

SetAddrBook allows to set address book on Switch.

func (*Switch) SetAddrFilter 

func (sw *Switch) SetAddrFilter(f func(net.Addr) error)

SetAddrFilter sets the function for filtering connections by address.

func (*Switch) SetIDFilter 

func (sw *Switch) SetIDFilter(f func(ID) error)

SetIDFilter sets the function for filtering connections by peer ID.

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) SetNodeKey 

func (sw *Switch) SetNodeKey(nodeKey *NodeKey)

SetNodeKey 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. If the peer is persistent, it will attempt to reconnect. TODO: make record depending on reason.

func (*Switch) StopPeerGracefully 

func (sw *Switch) StopPeerGracefully(peer Peer)

StopPeerGracefully disconnects from a peer gracefully. TODO: handle graceful disconnects.

type SwitchOption 

type SwitchOption func(*Switch)

SwitchOption sets an optional parameter on the Switch.

Source Files

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Directories

Path Synopsis
Taken from taipei-torrent.
 Taken from taipei-torrent.

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