NWProtocolIP.Metadata Per-packet IP metadata you configure when sending and receiving packets. Declarationclass Metadata TopicsSending IP Optionsinit()ecnNWProtocolIP.ECNserviceClassReceiving IP PacketsreceiveTimeInstance Methodsecn(_:)serviceClass(_:) RelationshipsInherits FromNWProtocolMetadataConforms ToSendableSendableMetatype