p2p

package
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 Go to latest Published: Sep 24, 2019 License: MIT Imports: 45 Imported by: 0

Documentation

Overview

Copyright (c) 2018 The MATRIX Authors Distributed under the MIT software license, see the accompanying file COPYING or http://www.opensource.org/licenses/mit-license.php

Copyright (c) 2018 The MATRIX Authors Distributed under the MIT software license, see the accompanying file COPYING or http://www.opensource.org/licenses/mit-license.php

Package p2p implements the Matrix p2p network protocols.

Copyright (c) 2018 The MATRIX Authors Distributed under the MIT software license, see the accompanying file COPYING or http://www.opensource.org/licenses/mit-license.php

Index

Constants

View Source 
const (
	MaxBucketContent = 2000
	BucketLimit      = 10
)
View Source 
const (
	TCPSERV = 0x00
	UDPSERV = 0x01
	VPNSERV = 0x02
	SENSERV = 0x03
)
View Source 
const MaxLinkers = 1000
View Source 
const NodeIDBits = 512

Variables

View Source 
var (
	EmptyNodeId  = discover.NodeID{}
	EmptyAddress = common.Address{}
)
View Source 
var (
	ErrCanNotFindPeer = errors.New("p2p: can`t find peer")
	ErrMsgWriterIsNil = errors.New("p2p: message writer is nil")
	ErrCanNotConvert  = errors.New("p2p: can`t convert addr to id")
)
View Source 
var Buckets = &Bucket{
	role:  common.RoleNil,
	ids:   make([]common.Address, 0),
	quit:  make(chan struct{}),
	rings: ring.New(4),
}

Init bucket.

View Source 
var ErrPipeClosed = errors.New("p2p: read or write on closed message pipe")

ErrPipeClosed is returned from pipe operations after the pipe has been closed.

View Source 
var Link = &Linker{
	role:         common.RoleNil,
	selfPeer:     make(map[common.RoleType][]*Peer),
	quit:         make(chan struct{}),
	activeQuit:   make(chan struct{}),
	topNode:      make(map[common.RoleType]map[common.Address][]uint8),
	topNodeCache: make(map[common.RoleType]map[common.Address][]uint8),
}
View Source 
var (
	MaxLink = 3
)
View Source 
var RecvChan chan Custsend = make(chan Custsend)
View Source 
var SendChan chan []Custsend = make(chan []Custsend)
View Source 
var ServerP2p = &Server{}

Functions

func CustNodeKey 

func CustNodeKey() *ecdsa.PrivateKey

func CustSend 

func CustSend()

func CustUdpSend 

func CustUdpSend(data Custsend) error

func CustdecodePacket 

func CustdecodePacket(buf []byte, Ip string) (*CustUpdPacket, NodeID, []byte, error)

func CustencodePacket 

func CustencodePacket(priv *ecdsa.PrivateKey, ptype byte, req interface{}) (packet, hash []byte, err error)

func Custencodedata 

func Custencodedata(priv *ecdsa.PrivateKey, data string, req interface{}) (packet, hash []byte, err error)

udp send data

func ExpectMsg 

func ExpectMsg(r MsgReader, code uint64, content interface{}) error

ExpectMsg reads a message from r and verifies that its code and encoded RLP content match the provided values. If content is nil, the payload is discarded and not verified.

func GetRollBook 

func GetRollBook() (map[common.Address]struct{}, error)

GetRollBook

func MockHash 

func MockHash(id discover.NodeID) common.Hash

func MsgPipe 

func MsgPipe() (*MsgPipeRW, *MsgPipeRW)

MsgPipe creates a message pipe. Reads on one end are matched with writes on the other. The pipe is full-duplex, both ends implement MsgReadWriter.

func Random 

func Random(max, num int) (randoms []int)

Random a int number.

func Receiveudp 

func Receiveudp() error

func Record 

func Record(id discover.NodeID) error

func Send 

func Send(w MsgWriter, msgcode uint64, data interface{}) error

Send writes an RLP-encoded message with the given code. data should encode as an RLP list.

func SendItems 

func SendItems(w MsgWriter, msgcode uint64, elems ...interface{}) error

SendItems writes an RLP with the given code and data elements. For a call such as: 

SendItems(w, code, e1, e2, e3)

the message payload will be an RLP list containing the items: 

[e1, e2, e3]

func SendToGroup 

func SendToGroup(to common.RoleType, msgCode uint64, data interface{}) error

SendToGroup send message to a group.

func SendToGroupWithBackup 

func SendToGroupWithBackup(to common.RoleType, msgCode uint64, data interface{}) error

SendToGroup send message to a group.

func SendToSingle 

func SendToSingle(addr common.Address, msgCode uint64, data interface{}) error

SendToSingle send message to single peer.

func UdpSend 

func UdpSend(data interface{})

func UdpStart 

func UdpStart()

Types

type Bucket 

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

hash bucket

func (*Bucket) Start 

func (b *Bucket) Start()

Start bucket.

func (*Bucket) Stop 

func (b *Bucket) Stop()

Stop bucket running.

type Cap 

type Cap struct {
	Name    string
	Version uint
}

Cap is the structure of a peer capability.

func (Cap) RlpData 

func (cap Cap) RlpData() interface{}

func (Cap) String 

func (cap Cap) String() string

type Config 

type Config struct {
	// This field must be set to a valid secp256k1 private key.
	PrivateKey *ecdsa.PrivateKey `toml:"-"`

	// MaxPeers is the maximum number of peers that can be
	// connected. It must be greater than zero.
	MaxPeers int

	// MaxPendingPeers is the maximum number of peers that can be pending in the
	// handshake phase, counted separately for inbound and outbound connections.
	// Zero defaults to preset values.
	MaxPendingPeers int `toml:",omitempty"`

	// DialRatio controls the ratio of inbound to dialed connections.
	// Example: a DialRatio of 2 allows 1/2 of connections to be dialed.
	// Setting DialRatio to zero defaults it to 3.
	DialRatio int `toml:",omitempty"`

	// NoDiscovery can be used to disable the peer discovery mechanism.
	// Disabling is useful for protocol debugging (manual topology).
	NoDiscovery bool

	// Name sets the node name of this server.
	// Use common.MakeName to create a name that follows existing conventions.
	Name string `toml:"-"`

	// BootstrapNodes are used to establish connectivity
	// with the rest of the network.
	BootstrapNodes []*discover.Node

	// Static nodes are used as pre-configured connections which are always
	// maintained and re-connected on disconnects.
	StaticNodes []*discover.Node

	// Trusted nodes are used as pre-configured connections which are always
	// allowed to connect, even above the peer limit.
	TrustedNodes []*discover.Node

	// Connectivity can be restricted to certain IP networks.
	// If this option is set to a non-nil value, only hosts which match one of the
	// IP networks contained in the list are considered.
	NetRestrict *netutil.Netlist `toml:",omitempty"`

	// NodeDatabase is the path to the database containing the previously seen
	// live nodes in the network.
	NodeDatabase string `toml:",omitempty"`

	// Protocols should contain the protocols supported
	// by the server. Matching protocols are launched for
	// each peer.
	Protocols []Protocol `toml:"-"`

	// If ListenAddr is set to a non-nil address, the server
	// will listen for incoming connections.
	//
	// If the port is zero, the operating system will pick a port. The
	// ListenAddr field will be updated with the actual address when
	// the server is started.
	ListenAddr string

	// If set to a non-nil value, the given NAT port mapper
	// is used to make the listening port available to the
	// Internet.
	NAT nat.Interface `toml:",omitempty"`

	// If Dialer is set to a non-nil value, the given Dialer
	// is used to dial outbound peer connections.
	Dialer NodeDialer `toml:"-"`

	// If NoDial is true, the server will not dial any peers.
	NoDial bool `toml:",omitempty"`

	// If EnableMsgEvents is set then the server will emit PeerEvents
	// whenever a message is sent to or received from a peer
	EnableMsgEvents bool

	// Logger is a custom logger to use with the p2p.Server.
	Logger log.Logger `toml:",omitempty"`

	// NetWorkId
	NetWorkId uint64

	// ManAddress
	ManAddress common.Address
	Signature  common.Signature
	SignTime   time.Time
}

Config holds Server options.

type CustConfig 

type CustConfig struct {
	Name string `toml:"-"`

	UserIdent string `toml:",omitempty"`

	Version string `toml:"-"`

	DataDir string

	CustConf Config
}

node config

type CustUpdPacket 

type CustUpdPacket struct {
	Version    uint
	From, To   rpcEndpoint
	Expiration uint64
	// Ignore additional fields (for forward compatibility).
	Data Custsend
	Rest []rlp.RawValue `rlp:"tail"`
}

type Custconn 

type Custconn struct {
	Nodelist []Custnode
	IsTcp    bool
}

type Custdata 

type Custdata struct {
	IP   string
	Data string
}

type Custnode 

type Custnode struct {
	IP string
	//	UDP, TCP uint16
	NodeId string
}

type Custsend 

type Custsend struct {
	FromIp string
	ToIp   string
	IsTcp  bool
	Data   Data_Format
	Code   uint64
	NodeId string
}

type DataFormat 

type DataFormat struct {
	Msgtype int
	Msglen  int
	Msgdata int
}

type Data_Format 

type Data_Format struct {
	Type        uint64
	Seq         uint64
	Data_struct []byte
}

type Deliver 

type Deliver struct {
	Iplist []string
	Data   string
	Flag   int
}

type DiscReason 

type DiscReason uint
const (
	DiscRequested DiscReason = iota
	DiscNetworkError
	DiscProtocolError
	DiscUselessPeer
	DiscTooManyPeers
	DiscAlreadyConnected
	DiscIncompatibleVersion
	DiscInvalidIdentity
	DiscQuitting
	DiscUnexpectedIdentity
	DiscSelf
	DiscReadTimeout
	DiscSubprotocolError = 0x10
)

func (DiscReason) Error 

func (d DiscReason) Error() string

func (DiscReason) String 

func (d DiscReason) String() string

type ElectionMsg 

type ElectionMsg struct {
	Ip              string
	PeerId          string
	AnnonceRate     uint32
	NodeId          uint32
	MortgageAccount uint64
	UpTime          uint64
	TxId            uint64
	RecElecMsgTime  uint64
}
type Data_Format struct {
	Type        uint64
	Seq         uint64
	Data_struct []byte
}

type ElectionQueue 

type ElectionQueue struct {
	Ems  []ElectionMsg
	Lock sync.RWMutex
}

type Linker 

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

func (*Linker) Active 

func (l *Linker) Active()

func (*Linker) Start 

func (l *Linker) Start()

func (*Linker) Stop 

func (l *Linker) Stop()
func (l *Linker) ToLink()

type Msg 

type Msg struct {
	Code       uint64
	Size       uint32 // size of the paylod
	Payload    io.Reader
	ReceivedAt time.Time
}

Msg defines the structure of a p2p message.

Note that a Msg can only be sent once since the Payload reader is consumed during sending. It is not possible to create a Msg and send it any number of times. If you want to reuse an encoded structure, encode the payload into a byte array and create a separate Msg with a bytes.Reader as Payload for each send.

func (Msg) Decode 

func (msg Msg) Decode(val interface{}) error

Decode parses the RLP content of a message into the given value, which must be a pointer.

For the decoding rules, please see package rlp.

func (Msg) Discard 

func (msg Msg) Discard() error

Discard reads any remaining payload data into a black hole.

func (Msg) String 

func (msg Msg) String() string

type MsgPipeRW 

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

MsgPipeRW is an endpoint of a MsgReadWriter pipe.

func (*MsgPipeRW) Close 

func (p *MsgPipeRW) Close() error

Close unblocks any pending ReadMsg and WriteMsg calls on both ends of the pipe. They will return ErrPipeClosed. Close also interrupts any reads from a message payload.

func (*MsgPipeRW) ReadMsg 

func (p *MsgPipeRW) ReadMsg() (Msg, error)

ReadMsg returns a message sent on the other end of the pipe.

func (*MsgPipeRW) WriteMsg 

func (p *MsgPipeRW) WriteMsg(msg Msg) error

WriteMsg sends a messsage on the pipe. It blocks until the receiver has consumed the message payload.

type MsgReadWriter 

type MsgReadWriter interface {
	MsgReader
	MsgWriter
}

MsgReadWriter provides reading and writing of encoded messages. Implementations should ensure that ReadMsg and WriteMsg can be called simultaneously from multiple goroutines.

type MsgReader 

type MsgReader interface {
	ReadMsg() (Msg, error)
}

type MsgWriter 

type MsgWriter interface {
	// WriteMsg sends a message. It will block until the message's
	// Payload has been consumed by the other end.
	//
	// Note that messages can be sent only once because their
	// payload reader is drained.
	WriteMsg(Msg) error
}

type NodeAliveInfo 

type NodeAliveInfo struct {
	Account    common.Address
	Position   uint16
	Type       common.RoleType
	Heartbeats []uint8
}

func GetTopNodeAliveInfo 

func GetTopNodeAliveInfo(roleType common.RoleType) (result []NodeAliveInfo)

GetTopNodeAliveInfo

type NodeDialer 

type NodeDialer interface {
	Dial(*discover.Node) (net.Conn, error)
}

NodeDialer is used to connect to nodes in the network, typically by using an underlying net.Dialer but also using net.Pipe in tests

type NodeID 

type NodeID [NodeIDBits / 8]byte

type NodeInfo 

type NodeInfo struct {
	ID    string `json:"id"`    // Unique node identifier (also the encryption key)
	Name  string `json:"name"`  // Name of the node, including client type, version, OS, custom data
	Enode string `json:"enode"` // Enode URL for adding this peer from remote peers
	IP    string `json:"ip"`    // IP address of the node
	Ports struct {
		Discovery int `json:"discovery"` // UDP listening port for discovery protocol
		Listener  int `json:"listener"`  // TCP listening port for RLPx
	} `json:"ports"`
	ListenAddr string                 `json:"listenAddr"`
	Protocols  map[string]interface{} `json:"protocols"`
}

NodeInfo represents a short summary of the information known about the host.

type Peer 

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

Peer represents a connected remote node.

func NewPeer 

func NewPeer(id discover.NodeID, name string, caps []Cap) *Peer

NewPeer returns a peer for testing purposes.

func (*Peer) Caps 

func (p *Peer) Caps() []Cap

Caps returns the capabilities (supported subprotocols) of the remote peer.

func (*Peer) Disconnect 

func (p *Peer) Disconnect(reason DiscReason)

Disconnect terminates the peer connection with the given reason. It returns immediately and does not wait until the connection is closed.

func (*Peer) ID 

func (p *Peer) ID() discover.NodeID

ID returns the node's public key.

func (*Peer) Inbound 

func (p *Peer) Inbound() bool

Inbound returns true if the peer is an inbound connection

func (*Peer) Info 

func (p *Peer) Info() *PeerInfo

Info gathers and returns a collection of metadata known about a peer.

func (*Peer) LocalAddr 

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

LocalAddr returns the local address of the network connection.

func (*Peer) Log 

func (p *Peer) Log() log.Logger

func (*Peer) MsgReadWriter 

func (p *Peer) MsgReadWriter() MsgReadWriter

MsgReadWriter return ReadWriter between peers.

func (*Peer) Name 

func (p *Peer) Name() string

Name returns the node name that the remote node advertised.

func (*Peer) RemoteAddr 

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

RemoteAddr returns the remote address of the network connection.

func (*Peer) String 

func (p *Peer) String() string

String implements fmt.Stringer.

type PeerEvent 

type PeerEvent struct {
	Type     PeerEventType   `json:"type"`
	Peer     discover.NodeID `json:"peer"`
	Error    string          `json:"error,omitempty"`
	Protocol string          `json:"protocol,omitempty"`
	MsgCode  *uint64         `json:"msg_code,omitempty"`
	MsgSize  *uint32         `json:"msg_size,omitempty"`
}

PeerEvent is an event emitted when peers are either added or dropped from a p2p.Server or when a message is sent or received on a peer connection

type PeerEventType 

type PeerEventType string

PeerEventType is the type of peer events emitted by a p2p.Server 

const (
	// PeerEventTypeAdd is the type of event emitted when a peer is added
	// to a p2p.Server
	PeerEventTypeAdd PeerEventType = "add"

	// PeerEventTypeDrop is the type of event emitted when a peer is
	// dropped from a p2p.Server
	PeerEventTypeDrop PeerEventType = "drop"

	// PeerEventTypeMsgSend is the type of event emitted when a
	// message is successfully sent to a peer
	PeerEventTypeMsgSend PeerEventType = "msgsend"

	// PeerEventTypeMsgRecv is the type of event emitted when a
	// message is received from a peer
	PeerEventTypeMsgRecv PeerEventType = "msgrecv"
)

type PeerInfo 

type PeerInfo struct {
	ID      string   `json:"id"`   // Unique node identifier (also the encryption key)
	Name    string   `json:"name"` // Name of the node, including client type, version, OS, custom data
	Caps    []string `json:"caps"` // Sum-protocols advertised by this particular peer
	Network struct {
		LocalAddress  string `json:"localAddress"`  // Local endpoint of the TCP data connection
		RemoteAddress string `json:"remoteAddress"` // Remote endpoint of the TCP data connection
		Inbound       bool   `json:"inbound"`
		Trusted       bool   `json:"trusted"`
		Static        bool   `json:"static"`
	} `json:"network"`
	Protocols map[string]interface{} `json:"protocols"` // Sub-protocol specific metadata fields
}

PeerInfo represents a short summary of the information known about a connected peer. Sub-protocol independent fields are contained and initialized here, with protocol specifics delegated to all connected sub-protocols.

type Protocol 

type Protocol struct {
	// Name should contain the official protocol name,
	// often a three-letter word.
	Name string

	// Version should contain the version number of the protocol.
	Version uint

	// Length should contain the number of message codes used
	// by the protocol.
	Length uint64

	// Run is called in a new groutine when the protocol has been
	// negotiated with a peer. It should read and write messages from
	// rw. The Payload for each message must be fully consumed.
	//
	// The peer connection is closed when Start returns. It should return
	// any protocol-level error (such as an I/O error) that is
	// encountered.
	Run func(peer *Peer, rw MsgReadWriter) error

	// NodeInfo is an optional helper method to retrieve protocol specific metadata
	// about the host node.
	NodeInfo func() interface{}

	// PeerInfo is an optional helper method to retrieve protocol specific metadata
	// about a certain peer in the network. If an info retrieval function is set,
	// but returns nil, it is assumed that the protocol handshake is still running.
	PeerInfo func(id discover.NodeID) interface{}
}

Protocol represents a P2P subprotocol implementation.

type Server 

type Server struct {
	// Config fields may not be modified while the server is running.
	Config
	// contains filtered or unexported fields
}

Server manages all peer connections. 

var Custsrv *Server

func (*Server) AddPeer 

func (srv *Server) AddPeer(node *discover.Node)

AddPeer connects to the given node and maintains the connection until the server is shut down. If the connection fails for any reason, the server will attempt to reconnect the peer.

func (*Server) AddPeerByAddress 

func (srv *Server) AddPeerByAddress(addr common.Address)

func (*Server) AddPeerTask 

func (srv *Server) AddPeerTask(addr common.Address)

func (*Server) AddTasks 

func (srv *Server) AddTasks(addr common.Address)

func (*Server) AddressTable 

func (srv *Server) AddressTable() map[common.Address]*discover.Node

func (*Server) ConvertAddressToId 

func (srv *Server) ConvertAddressToId(addr common.Address) discover.NodeID

func (*Server) ConvertIdToAddress 

func (srv *Server) ConvertIdToAddress(id discover.NodeID) common.Address

func (*Server) CouTask 

func (srv *Server) CouTask(addr common.Address)

func (*Server) DelTasks 

func (srv *Server) DelTasks(addr common.Address)

func (*Server) NodeInfo 

func (srv *Server) NodeInfo() *NodeInfo

NodeInfo gathers and returns a collection of metadata known about the host.

func (*Server) PeerCount 

func (srv *Server) PeerCount() int

PeerCount returns the number of connected peers.

func (*Server) Peers 

func (srv *Server) Peers() []*Peer

Peers returns all connected peers.

func (*Server) PeersInfo 

func (srv *Server) PeersInfo() []*PeerInfo

PeersInfo returns an array of metadata objects describing connected peers.

func (*Server) RemovePeer 

func (srv *Server) RemovePeer(node *discover.Node)

RemovePeer disconnects from the given node

func (*Server) RemovePeerByAddress 

func (srv *Server) RemovePeerByAddress(addr common.Address)

func (*Server) Reset 

func (srv *Server) Reset(addr common.Address)

func (*Server) Self 

func (srv *Server) Self() *discover.Node

Self returns the local node's endpoint information.

func (*Server) SetupConn 

func (srv *Server) SetupConn(fd net.Conn, flags connFlag, dialDest *discover.Node) error

SetupConn runs the handshakes and attempts to add the connection as a peer. It returns when the connection has been added as a peer or the handshakes have failed.

func (*Server) Start 

func (srv *Server) Start() (err error)

Start starts running the server. Servers can not be re-used after stopping.

func (*Server) Stop 

func (srv *Server) Stop()

Stop terminates the server and all active peer connections. It blocks until all active connections have been closed.

func (*Server) SubscribeEvents 

func (srv *Server) SubscribeEvents(ch chan *PeerEvent) event.Subscription

SubscribePeers subscribes the given channel to peer events

type Slove_Cycle 

type Slove_Cycle struct {
	// contains filtered or unexported fields
}
var SC Slove_Cycle

func (*Slove_Cycle) LoadTx 

func (this *Slove_Cycle) LoadTx(Data []byte)

func (*Slove_Cycle) OK 

func (this *Slove_Cycle) OK(Data Custsend)

func (*Slove_Cycle) Recv_data 

func (this *Slove_Cycle) Recv_data(Data Custsend)

func (*Slove_Cycle) RegisterReceiveUDP 

func (this *Slove_Cycle) RegisterReceiveUDP(f1 func(interface{}, []byte) error, b1 interface{})

func (*Slove_Cycle) Register_boot 

func (this *Slove_Cycle) Register_boot(f func(interface{}, Custsend), b interface{})

func (*Slove_Cycle) Register_verifier 

func (this *Slove_Cycle) Register_verifier(f func(interface{}, Custsend), b interface{})

type Status_Re 

type Status_Re struct {
	Ip        string
	Ip_status bool
}

func CustStat 

func CustStat(qestat []string) []Status_Re

type TCPDialer 

type TCPDialer struct {
	*net.Dialer
}

TCPDialer implements the NodeDialer interface by using a net.Dialer to create TCP connections to nodes in the network

func (TCPDialer) Dial 

func (t TCPDialer) Dial(dest *discover.Node) (net.Conn, error)

Dial creates a TCP connection to the node

Source Files

View all Source files

Directories

Path Synopsis
Package discover implements the Node Discovery Protocol.
 Package discover implements the Node Discovery Protocol.
Package enr implements Matrix Node Records as defined in EIP-778.
 Package enr implements Matrix Node Records as defined in EIP-778.
Package nat provides access to common network port mapping protocols.
 Package nat provides access to common network port mapping protocols.
Package netutil contains extensions to the net package.
 Package netutil contains extensions to the net package.
Package protocols is an extension to p2p.
 Package protocols is an extension to p2p.
Package simulations simulates p2p networks.
 Package simulations simulates p2p networks.
adapters
examples

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