/// <summary>
 /// Returns if a given filter applies to an offline packet.
 /// </summary>
 /// <returns></returns>
 internal static bool pcap_offline_filter(IntPtr /*bpf_program **/ prog, IntPtr /* pcap_pkthdr* */ header, IntPtr pkt_data)
 {
     return(UseWindows ? Windows.pcap_offline_filter(prog, header, pkt_data) : Unix.pcap_offline_filter(prog, header, pkt_data));
 }