Allow Option to set quic.Config{}.KeepAlivePeriod

[zeisler]

I'm requesting the ability to set the KeepAlivePeriod for quic connections.

go-libp2p/p2p/transport/quicreuse/config.go

Line 14 in 0385ec9

KeepAlivePeriod: 15 * time.Second,

When rebooting an upstream node and I'd like the downstream node to notice it's disconnected quicker so it can find a new node.

[marten-seemann]

Are you familiar with QUIC Stateless Resets? They should solve this problem: https://quic-go.net/docs/quic/transport/#stateless-reset

[zeisler]

Does this mean that as long as the private key is constant this should already work?

[marten-seemann]

Yes, and the stateless reset key is derived from the node's libp2p (private) key:

go-libp2p/config/quic.go

Lines 19 to 30 in 0385ec9

	func PrivKeyToStatelessResetKey(key crypto.PrivKey) (quic.StatelessResetKey, error) {
	var statelessResetKey quic.StatelessResetKey
	keyBytes, err := key.Raw()
	if err != nil {
	return statelessResetKey, err
	}
	keyReader := hkdf.New(sha256.New, keyBytes, nil, []byte(statelessResetKeyInfo))
	if _, err := io.ReadFull(keyReader, statelessResetKey[:]); err != nil {
	return statelessResetKey, err
	}
	return statelessResetKey, nil
	}