Enum libp2p_swarm::NetworkBehaviourAction

pub enum NetworkBehaviourAction<TInEvent, TOutEvent> {
    GenerateEvent(TOutEvent),
    DialAddress {
        address: Multiaddr,
    },
    DialPeer {
        peer_id: PeerId,
        condition: DialPeerCondition,
    },
    NotifyHandler {
        peer_id: PeerId,
        handler: NotifyHandler,
        event: TInEvent,
    },
    ReportObservedAddr {
        address: Multiaddr,
        score: AddressScore,
    },
}

An action that a NetworkBehaviour can trigger in the Swarm in whose context it is executing.

Variants

GenerateEvent(TOutEvent)

Instructs the Swarm to return an event when it is being polled.

DialAddress

Fields

address: Multiaddr

The address to dial.

Instructs the swarm to dial the given multiaddress, with no knowledge of the PeerId that may be reached.

DialPeer

Fields

peer_id: PeerId

The peer to try reach.

condition: DialPeerCondition

The condition for initiating a new dialing attempt.

Instructs the swarm to dial a known PeerId.

The addresses_of_peer method is called to determine which addresses to attempt to reach.

If we were already trying to dial this node, the addresses that are not yet in the queue of addresses to try are added back to this queue.

On success, NetworkBehaviour::inject_connected is invoked. On failure, NetworkBehaviour::inject_dial_failure is invoked.

NotifyHandler

Fields

peer_id: PeerId

The peer for whom a ProtocolsHandler should be notified.

handler: NotifyHandler

The options w.r.t. which connection handler to notify of the event.

event: TInEvent

The event to send.

Instructs the Swarm to send an event to the handler dedicated to a connection with a peer.

If the Swarm is connected to the peer, the message is delivered to the ProtocolsHandler instance identified by the peer ID and connection ID.

If the specified connection no longer exists, the event is silently dropped.

Typically the connection ID given is the same as the one passed to NetworkBehaviour::inject_event, i.e. whenever the behaviour wishes to respond to a request on the same connection (and possibly the same substream, as per the implementation of ProtocolsHandler).

Note that even if the peer is currently connected, connections can get closed at any time and thus the event may not reach a handler.

ReportObservedAddr

Fields

address: Multiaddr

The observed address of the local node.

score: AddressScore

The score to associate with this observation, i.e. an indicator for the trusworthiness of this address relative to other observed addresses.

Informs the Swarm about an address observed by a remote for the local node by which the local node is supposedly publicly reachable.

It is advisable to issue ReportObservedAddr actions at a fixed frequency per node. This way address information will be more accurate over time and individual outliers carry less weight.

Implementations

impl<TInEvent, TOutEvent> NetworkBehaviourAction<TInEvent, TOutEvent>

pub fn map_in<E>(
    self,
    f: impl FnOnce(TInEvent) -> E
) -> NetworkBehaviourAction<E, TOutEvent>

Map the handler event.

pub fn map_out<E>(
    self,
    f: impl FnOnce(TOutEvent) -> E
) -> NetworkBehaviourAction<TInEvent, E>

Map the event the swarm will return.

Trait Implementations

impl<TInEvent: Debug, TOutEvent: Debug> Debug for NetworkBehaviourAction<TInEvent, TOutEvent>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.