gossip

Documentation

Index

• Variables
• func GetAddress(p *peer.Peer) string
• func IsSupported(p *peer.Peer) bool
• type Events
• type LoadMessageFunc
• type Manager
  • func NewManager(local *peer.Local, f LoadMessageFunc, log *logger.Logger) *Manager
  • func (m *Manager) AddInbound(p *peer.Peer) error
  • func (m *Manager) AddOutbound(p *peer.Peer) error
  • func (m *Manager) AllNeighbors() []*Neighbor
  • func (m *Manager) Close()
  • func (m *Manager) DropNeighbor(id identity.ID) error
  • func (m *Manager) Events() Events
  • func (m *Manager) MessageRequestWorkerPoolStatus() (name string, load int)
  • func (m *Manager) MessageWorkerPoolStatus() (name string, load int)
  • func (m *Manager) RequestMessage(messageID []byte, to ...identity.ID)
  • func (m *Manager) SendMessage(msgData []byte, to ...identity.ID)
  • func (m *Manager) Start(srv *server.TCP)
• type MessageReceivedEvent
• type Neighbor
  • func NewNeighbor(peer *peer.Peer, conn net.Conn, log *logger.Logger) *Neighbor
  • func (n *Neighbor) Close() error
  • func (n *Neighbor) ConnectionEstablished() time.Time
  • func (n *Neighbor) IsOutbound() bool
  • func (n *Neighbor) Listen()
  • func (n *Neighbor) Write(b []byte) (int, error)

Variables

var (
	// ErrNotRunning is returned when a neighbor is added to a stopped or not yet started gossip manager.
	ErrNotRunning = errors.New("manager not running")
	// ErrUnknownNeighbor is returned when the specified neighbor is not known to the gossip manager.
	ErrUnknownNeighbor = errors.New("unknown neighbor")
	// ErrLoopbackNeighbor is returned when the own peer is specified as a neighbor.
	ErrLoopbackNeighbor = errors.New("loopback connection not allowed")
	// ErrDuplicateNeighbor is returned when the same peer is added more than once as a neighbor.
	ErrDuplicateNeighbor = errors.New("already connected")
	// ErrInvalidPacket is returned when the gossip manager receives an invalid packet.
	ErrInvalidPacket = errors.New("invalid packet")
	// ErrNeighborQueueFull is returned when the send queue is already full.
	ErrNeighborQueueFull = errors.New("send queue is full")
)

Functions

func GetAddress

func GetAddress(p *peer.Peer) string

GetAddress returns the address of the gossip service.

func IsSupported

func IsSupported(p *peer.Peer) bool

IsSupported returns whether the peer supports the gossip service.

Types

type Events

type Events struct {
	// Fired when an attempt to build a connection to a neighbor has failed.
	ConnectionFailed *events.Event
	// Fired when a neighbor connection has been established.
	NeighborAdded *events.Event
	// Fired when a neighbor has been removed.
	NeighborRemoved *events.Event
	// Fired when a new message was received via the gossip protocol.
	MessageReceived *events.Event
}

Events defines all the events related to the gossip protocol.

type LoadMessageFunc

type LoadMessageFunc func(messageId tangle.MessageID) ([]byte, error)

LoadMessageFunc defines a function that returns the message for the given id.

type Manager

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

The Manager handles the connected neighbors.

func NewManager

func NewManager(local *peer.Local, f LoadMessageFunc, log *logger.Logger) *Manager

NewManager creates a new Manager.

func (*Manager) AddInbound

func (m *Manager) AddInbound(p *peer.Peer) error

AddInbound tries to add a neighbor by accepting an incoming connection from that peer.

func (*Manager) AddOutbound

func (m *Manager) AddOutbound(p *peer.Peer) error

AddOutbound tries to add a neighbor by connecting to that peer.

func (*Manager) AllNeighbors

func (m *Manager) AllNeighbors() []*Neighbor

AllNeighbors returns all the neighbors that are currently connected.

func (*Manager) Close

func (m *Manager) Close()

Close stops the manager and closes all established connections.

func (*Manager) DropNeighbor

func (m *Manager) DropNeighbor(id identity.ID) error

DropNeighbor disconnects the neighbor with the given ID.

func (*Manager) Events

func (m *Manager) Events() Events

Events returns the events related to the gossip protocol.

func (*Manager) MessageRequestWorkerPoolStatus

func (m *Manager) MessageRequestWorkerPoolStatus() (name string, load int)

MessageRequestWorkerPoolStatus returns the name and the load of the workerpool.

func (*Manager) MessageWorkerPoolStatus

func (m *Manager) MessageWorkerPoolStatus() (name string, load int)

MessageWorkerPoolStatus returns the name and the load of the workerpool.

func (*Manager) RequestMessage

func (m *Manager) RequestMessage(messageID []byte, to ...identity.ID)

RequestMessage requests the message with the given id from the neighbors. If no peer is provided, all neighbors are queried.

func (*Manager) SendMessage

func (m *Manager) SendMessage(msgData []byte, to ...identity.ID)

SendMessage adds the given message the send queue of the neighbors. The actual send then happens asynchronously. If no peer is provided, it is send to all neighbors.

func (*Manager) Start

func (m *Manager) Start(srv *server.TCP)

Start starts the manager for the given TCP server.

type MessageReceivedEvent

type MessageReceivedEvent struct {
	// The raw message.
	Data []byte
	// The sender of the message.
	Peer *peer.Peer
}

MessageReceivedEvent holds data about a message received event.

type Neighbor

type Neighbor struct {
	*peer.Peer
	*buffconn.BufferedConnection
	// contains filtered or unexported fields
}

Neighbor describes the established gossip connection to another peer.

func NewNeighbor

func NewNeighbor(peer *peer.Peer, conn net.Conn, log *logger.Logger) *Neighbor

NewNeighbor creates a new neighbor from the provided peer and connection.

func (*Neighbor) Close

func (n *Neighbor) Close() error

Close closes the connection to the neighbor and stops all communication.

func (*Neighbor) ConnectionEstablished

func (n *Neighbor) ConnectionEstablished() time.Time

ConnectionEstablished returns the connection established.

func (*Neighbor) IsOutbound

func (n *Neighbor) IsOutbound() bool

IsOutbound returns true if the neighbor is an outbound neighbor.

func (*Neighbor) Listen

func (n *Neighbor) Listen()

Listen starts the communication to the neighbor.

func (*Neighbor) Write

func (n *Neighbor) Write(b []byte) (int, error)