connection

package
v0.32.11-verification-... Latest Latest
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 Go to latest Published: Dec 22, 2023 License: AGPL-3.0 Imports: 25 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	// PruningEnabled is a boolean flag to enable pruning of connections to peers that are not part of
	// the explicit update list.
	// If set to true, the connector will prune connections to peers that are not part of the explicit update list.
	PruningEnabled = true

	// PruningDisabled is a boolean flag to disable pruning of connections to peers that are not part of
	// the explicit update list.
	// If set to false, the connector will not prune connections to peers that are not part of the explicit update list.
	PruningDisabled = false
)

Variables

View Source 
var DefaultPeerUpdateInterval = time.Second

DefaultPeerUpdateInterval is default duration for which the peer manager waits in between attempts to update peer connections. We set it to 1 second to be aligned with the heartbeat intervals of libp2p, alsp, and gossipsub.

Functions

func DefaultLibp2pBackoffConnectorFactory added in v0.31.0 

func DefaultLibp2pBackoffConnectorFactory() p2p.ConnectorFactory

DefaultLibp2pBackoffConnectorFactory is a factory function to create a new BackoffConnector. It uses the default values for the backoff connector. (https://github.com/libp2p/go-libp2p-pubsub/blob/master/discovery.go#L34)

Types

type ConnGater 

type ConnGater struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

ConnGater is the implementation of the libp2p connmgr.ConnectionGater interface It provides node allowlisting by libp2p peer.ID which is derived from the node public networking key

func NewConnGater 

func NewConnGater(log zerolog.Logger, identityProvider module.IdentityProvider, opts ...ConnGaterOption) *ConnGater

func (*ConnGater) InterceptAccept 

func (c *ConnGater) InterceptAccept(cm network.ConnMultiaddrs) bool

InterceptAccept is not used. Currently, allowlisting is only implemented by Peer IDs and not multi-addresses

func (*ConnGater) InterceptAddrDial 

func (c *ConnGater) InterceptAddrDial(_ peer.ID, ma multiaddr.Multiaddr) bool

InterceptAddrDial is not used. Currently, allowlisting is only implemented by Peer IDs and not multi-addresses

func (*ConnGater) InterceptPeerDial 

func (c *ConnGater) InterceptPeerDial(p peer.ID) bool

InterceptPeerDial - a callback which allows or disallows outbound connection

func (*ConnGater) InterceptSecured 

func (c *ConnGater) InterceptSecured(dir network.Direction, p peer.ID, addr network.ConnMultiaddrs) bool

InterceptSecured a callback executed after the libp2p security handshake. It tests whether to accept or reject an inbound connection based on its peer id.

func (*ConnGater) InterceptUpgraded 

func (c *ConnGater) InterceptUpgraded(network.Conn) (allow bool, reason control.DisconnectReason)

InterceptUpgraded decision to continue or drop the connection should have been made before this call

func (*ConnGater) SetDisallowListOracle added in v0.32.0 

func (c *ConnGater) SetDisallowListOracle(oracle p2p.DisallowListOracle)

SetDisallowListOracle sets the disallow list oracle for the connection gater. If one is set, the oracle is consulted upon every incoming or outgoing connection attempt, and the connection is only allowed if the remote peer is not on the disallow list. In Flow blockchain, it is not optional to dismiss the disallow list oracle, and if one is not set the connection gater will panic. Also, it follows a dependency injection pattern and does not allow to set the disallow list oracle more than once, any subsequent calls to this method will result in a panic. Args: 

oracle: the disallow list oracle to set.

Returns: 

none

Panics: 

if the disallow list oracle is already set.

type ConnGaterOption 

type ConnGaterOption func(*ConnGater)

ConnGaterOption allow the connection gater to be configured with a list of PeerFilter funcs for a specific conn gater callback. In the current implementation of the ConnGater the following callbacks can be configured with peer filters. * InterceptPeerDial - peer filters can be configured with WithOnInterceptPeerDialFilters which will allow or disallow outbound connections. * InterceptSecured - peer filters can be configured with WithOnInterceptSecuredFilters which will allow or disallow inbound connections after libP2P security handshake.

func WithOnInterceptPeerDialFilters 

func WithOnInterceptPeerDialFilters(filters []p2p.PeerFilter) ConnGaterOption

WithOnInterceptPeerDialFilters sets peer filters for outbound connections.

func WithOnInterceptSecuredFilters 

func WithOnInterceptSecuredFilters(filters []p2p.PeerFilter) ConnGaterOption

WithOnInterceptSecuredFilters sets peer filters for inbound secured connections.

type ConnManager 

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

ConnManager provides an implementation of Libp2p's ConnManager interface (https://pkg.go.dev/github.com/libp2p/go-libp2p/core/connmgr#ConnManager) It is called back by libp2p when certain events occur such as opening/closing a stream, opening/closing connection etc. Current implementation primarily acts as a wrapper around libp2p's BasicConnMgr (https://pkg.go.dev/github.com/libp2p/go-libp2p/p2p/net/connmgr#BasicConnMgr). However, we override the notifiee callback to add additional functionality so that it provides metrics and logging instrumentation for Flow.

func NewConnManager 

func NewConnManager(logger zerolog.Logger, metric module.LibP2PConnectionMetrics, cfg *netconf.ConnectionManagerConfig) (*ConnManager, error)

NewConnManager creates a new connection manager. It errors if creating the basic connection manager of libp2p fails. The error is not benign, and we should crash the node if it happens. It is a malpractice to start the node without connection manager.

func (*ConnManager) Close added in v0.30.0 

func (cm *ConnManager) Close() error

func (*ConnManager) GetTagInfo added in v0.30.0 

func (cm *ConnManager) GetTagInfo(p peer.ID) *connmgr.TagInfo

func (*ConnManager) IsProtected 

func (cm *ConnManager) IsProtected(id peer.ID, tag string) bool

func (*ConnManager) Notifee 

func (cm *ConnManager) Notifee() network.Notifiee

func (*ConnManager) Protect 

func (cm *ConnManager) Protect(id peer.ID, tag string)

func (*ConnManager) TagPeer added in v0.30.0 

func (cm *ConnManager) TagPeer(id peer.ID, s string, i int)

func (*ConnManager) TrimOpenConns added in v0.30.0 

func (cm *ConnManager) TrimOpenConns(ctx context.Context)

func (*ConnManager) Unprotect 

func (cm *ConnManager) Unprotect(id peer.ID, tag string) bool

func (*ConnManager) UntagPeer added in v0.30.0 

func (cm *ConnManager) UntagPeer(p peer.ID, tag string)

func (*ConnManager) UpsertTag added in v0.30.0 

func (cm *ConnManager) UpsertTag(p peer.ID, tag string, upsert func(int) int)

type ConnectorHost added in v0.31.0 

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

ConnectorHost is a wrapper around the libp2p host.Host interface to provide the required functionality for the Connector interface.

func NewConnectorHost added in v0.31.0 

func NewConnectorHost(h host.Host) *ConnectorHost

func (*ConnectorHost) ClosePeer added in v0.31.0 

func (c *ConnectorHost) ClosePeer(id peer.ID) error

ClosePeer closes the connection to the given peer.ID. Args: 

id: peer.ID for which the connection is to be closed

Returns: 

error if there is any error while closing the connection to the given peer.ID. All errors are benign.

func (*ConnectorHost) Connections added in v0.31.0 

func (c *ConnectorHost) Connections() []network.Conn

Connections returns all the connections of the underlying host.

func (*ConnectorHost) ID added in v0.31.0 

func (c *ConnectorHost) ID() peer.ID

ID returns the peer.ID of the underlying host. Returns: 

peer.ID of the underlying host.

ID returns the peer.ID of the underlying host.

func (*ConnectorHost) IsConnectedTo added in v0.32.0 

func (c *ConnectorHost) IsConnectedTo(peerID peer.ID) bool

IsConnectedTo returns true if the given peer.ID is connected to the underlying host. Args: 

peerID: peer.ID for which the connection status is requested

Returns: 

true if the given peer.ID is connected to the underlying host.

func (*ConnectorHost) IsProtected added in v0.31.0 

func (c *ConnectorHost) IsProtected(id peer.ID) bool

IsProtected returns true if the given peer.ID is protected from pruning. Args: 

id: peer.ID for which the protection status is requested

Returns: 

true if the given peer.ID is protected from pruning

func (*ConnectorHost) PeerInfo added in v0.31.0 

func (c *ConnectorHost) PeerInfo(id peer.ID) peer.AddrInfo

PeerInfo returns the peer.AddrInfo for the given peer.ID. Args: 

id: peer.ID for which the peer.AddrInfo is requested

Returns: 

peer.AddrInfo for the given peer.ID

type PeerManager 

type PeerManager struct {
	component.Component
	// contains filtered or unexported fields
}

PeerManager adds and removes connections to peers periodically and on request

func NewPeerManager 

func NewPeerManager(logger zerolog.Logger, updateInterval time.Duration, connector p2p.PeerUpdater) *PeerManager

NewPeerManager creates a new peer manager which calls the peersProvider callback to get a list of peers to connect to and it uses the connector to actually connect or disconnect from peers.

func (*PeerManager) ForceUpdatePeers 

func (pm *PeerManager) ForceUpdatePeers(ctx context.Context)

ForceUpdatePeers initiates an update to the peer connections of this node immediately

func (*PeerManager) OnRateLimitedPeer added in v0.30.0 

func (pm *PeerManager) OnRateLimitedPeer(pid peer.ID, role, msgType, topic, reason string)

OnRateLimitedPeer rate limiter distributor consumer func that will be called when a peer is rate limited, the rate limited peer is disconnected immediately after being rate limited.

func (*PeerManager) RequestPeerUpdate 

func (pm *PeerManager) RequestPeerUpdate()

RequestPeerUpdate requests an update to the peer connections of this node. If a peer update has already been requested (either as a periodic request or an on-demand request) and is outstanding, then this call is a no-op.

func (*PeerManager) SetPeersProvider 

func (pm *PeerManager) SetPeersProvider(peersProvider p2p.PeersProvider)

SetPeersProvider sets the peers provider SetPeersProvider may be called at most once

type PeerUpdater added in v0.32.0 

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

PeerUpdater is a connector that connects to a list of peers and disconnects from any other connection that the libp2p node might have.

func NewPeerUpdater added in v0.32.0 

func NewPeerUpdater(cfg *PeerUpdaterConfig) (*PeerUpdater, error)

NewPeerUpdater creates a new libp2p based connector Args:

  • cfg: configuration for the connector

Returns:

  • *PeerUpdater: a new libp2p based connector
  • error: an error if there is any error while creating the connector. The errors are irrecoverable and unexpected.

func (*PeerUpdater) UpdatePeers added in v0.32.0 

func (l *PeerUpdater) UpdatePeers(ctx context.Context, peerIDs peer.IDSlice)

UpdatePeers is the implementation of the Connector.UpdatePeers function. It connects to all of the ids and disconnects from any other connection that the libp2p node might have.

type PeerUpdaterConfig added in v0.32.0 

type PeerUpdaterConfig struct {
	// PruneConnections is a boolean flag to enable pruning of connections to peers that are not part of the explicit update list.
	PruneConnections bool

	// Logger is the logger to be used by the connector
	Logger zerolog.Logger

	// Host is the libp2p host to be used by the connector.
	Host p2p.ConnectorHost

	// ConnectorFactory is a factory function to create a new connector.
	Connector p2p.Connector
}

PeerUpdaterConfig is the configuration for the libp2p based connector.

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