batching

type Conn interface {
	nettype.PacketConn
	// ReadBatch reads messages from [Conn] into msgs. It returns the number of
	// messages the caller should evaluate for nonzero len, as a zero len
	// message may fall on either side of a nonzero.
	//
	// Each [ipv6.Message.OOB] must be sized to at least MinControlMessageSize().
	ReadBatch(msgs []ipv6.Message, flags int) (n int, err error)
	// WriteBatchTo writes buffs to addr.
	//
	// If geneve.VNI.IsSet(), then geneve is encoded into the space preceding
	// offset, and offset must equal [packet.GeneveFixedHeaderLength]. If
	// !geneve.VNI.IsSet() then the space preceding offset is ignored.
	//
	// len(buffs) must be <= batchSize supplied in TryUpgradeToConn().
	//
	// WriteBatchTo may return a [neterror.ErrUDPGSODisabled] error if UDP GSO
	// was disabled as a result of a send error.
	WriteBatchTo(buffs [][]byte, addr netip.AddrPort, geneve packet.GeneveHeader, offset int) error
}