# NetworkingDriverKit Structures ## Topics ### Structures [`struct IOUserNetworkHardwareCounts;`](/documentation/NetworkingDriverKit/IOUserNetworkHardwareCounts) [`struct IOUserNetworkKeepAliveOffloadFrame;`](/documentation/NetworkingDriverKit/IOUserNetworkKeepAliveOffloadFrame) [`struct IOUserNetworkLinkLayerReachabilityInfo;`](/documentation/NetworkingDriverKit/IOUserNetworkLinkLayerReachabilityInfo) [`struct IOUserNetworkPacketBufferPoolOptions;`](/documentation/NetworkingDriverKit/IOUserNetworkPacketBufferPoolOptions) [`struct IOUserNetworkPacketDescriptor;`](/documentation/NetworkingDriverKit/IOUserNetworkPacketDescriptor) [`struct IOUserNetworkPacketPollerParameters;`](/documentation/NetworkingDriverKit/IOUserNetworkPacketPollerParameters) [`struct IOUserNetworkPacketQueue_IVars;`](/documentation/NetworkingDriverKit/IOUserNetworkPacketQueue_IVars) [`struct IOUserNetworkRxCompletionQueue_IVars;`](/documentation/NetworkingDriverKit/IOUserNetworkRxCompletionQueue_IVars) [`struct IOUserNetworkRxSubmissionQueue_IVars;`](/documentation/NetworkingDriverKit/IOUserNetworkRxSubmissionQueue_IVars) [`struct IOUserNetworkStatistics;`](/documentation/NetworkingDriverKit/IOUserNetworkStatistics) [`struct IOUserNetworkTSOOptions;`](/documentation/NetworkingDriverKit/IOUserNetworkTSOOptions) [`struct IOUserNetworkTxCompletionQueue_IVars;`](/documentation/NetworkingDriverKit/IOUserNetworkTxCompletionQueue_IVars) [`struct IOUserNetworkTxSubmissionQueue_IVars;`](/documentation/NetworkingDriverKit/IOUserNetworkTxSubmissionQueue_IVars) [`struct nicproxy_inet_info_s;`](/documentation/NetworkingDriverKit/nicproxy_inet_info_s) [`struct nicproxy_info_s;`](/documentation/NetworkingDriverKit/nicproxy_info_s) [`struct nicproxy_keep_alive_info_s;`](/documentation/NetworkingDriverKit/nicproxy_keep_alive_info_s) [`struct nicproxy_limits_info_s;`](/documentation/NetworkingDriverKit/nicproxy_limits_info_s) [`struct nicproxy_port_info_s;`](/documentation/NetworkingDriverKit/nicproxy_port_info_s) [`struct nicproxy_rr_info_s;`](/documentation/NetworkingDriverKit/nicproxy_rr_info_s) [`struct nicproxy_v4_keep_alive_s;`](/documentation/NetworkingDriverKit/nicproxy_v4_keep_alive_s) [`struct nicproxy_v6_keep_alive_s;`](/documentation/NetworkingDriverKit/nicproxy_v6_keep_alive_s) [`struct rr_null_record_s;`](/documentation/NetworkingDriverKit/rr_null_record_s) [`struct rr_ptr_record_s;`](/documentation/NetworkingDriverKit/rr_ptr_record_s) [`struct rr_srv_record_s;`](/documentation/NetworkingDriverKit/rr_srv_record_s) [`struct rr_sub_type_s;`](/documentation/NetworkingDriverKit/rr_sub_type_s) [`struct rr_txt_record_s;`](/documentation/NetworkingDriverKit/rr_txt_record_s) [`union rr_record_s;`](/documentation/NetworkingDriverKit/rr_record_s) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)