/// <summary>
/// Marshal this structure into the platform dependent version and return
/// and IntPtr to that memory
///
/// NOTE: IntPtr MUST BE FREED via Marshal.FreeHGlobal()
/// </summary>
/// <returns>
/// A <see cref="IntPtr"/>
/// </returns>
public IntPtr MarshalToIntPtr()
{
IntPtr hdrPtr;
if (Environment.OSVersion.Platform == PlatformID.Unix)
{
// setup the structure to marshal
PcapUnmanagedStructures.pcap_pkthdr_unix pkthdr = new PcapUnmanagedStructures.pcap_pkthdr_unix();
pkthdr.caplen = this.CaptureLength;
pkthdr.len = this.PacketLength;
pkthdr.ts.tv_sec = (IntPtr)this.Seconds;
pkthdr.ts.tv_usec = (IntPtr)this.MicroSeconds;
hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(PcapUnmanagedStructures.pcap_pkthdr_unix)));
Marshal.StructureToPtr(pkthdr, hdrPtr, true);
}
else
{
PcapUnmanagedStructures.pcap_pkthdr_windows pkthdr = new PcapUnmanagedStructures.pcap_pkthdr_windows();
pkthdr.caplen = this.CaptureLength;
pkthdr.len = this.PacketLength;
pkthdr.ts.tv_sec = (int)this.Seconds;
pkthdr.ts.tv_usec = (int)this.MicroSeconds;
hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(PcapUnmanagedStructures.pcap_pkthdr_windows)));
Marshal.StructureToPtr(pkthdr, hdrPtr, true);
}
return(hdrPtr);
}
internal PcapHeader(IntPtr pcap_pkthdr)
{
if (Environment.OSVersion.Platform == PlatformID.Unix)
{
PcapUnmanagedStructures.pcap_pkthdr_unix pkthdr =
(PcapUnmanagedStructures.pcap_pkthdr_unix)Marshal.PtrToStructure(pcap_pkthdr,
typeof(PcapUnmanagedStructures.pcap_pkthdr_unix));
this.CaptureLength = pkthdr.caplen;
this.PacketLength = pkthdr.len;
this.Seconds = (ulong)pkthdr.ts.tv_sec;
this.MicroSeconds = (ulong)pkthdr.ts.tv_usec;
}
else
{
PcapUnmanagedStructures.pcap_pkthdr_windows pkthdr =
(PcapUnmanagedStructures.pcap_pkthdr_windows)Marshal.PtrToStructure(pcap_pkthdr,
typeof(PcapUnmanagedStructures.pcap_pkthdr_windows));
this.CaptureLength = pkthdr.caplen;
this.PacketLength = pkthdr.len;
this.Seconds = (ulong)pkthdr.ts.tv_sec;
this.MicroSeconds = (ulong)pkthdr.ts.tv_usec;
}
}
/// <summary>
/// Marshal this structure into the platform dependent version and return
/// and IntPtr to that memory
///
/// NOTE: IntPtr MUST BE FREED via Marshal.FreeHGlobal()
/// </summary>
/// <returns>
/// A <see cref="IntPtr"/>
/// </returns>
public IntPtr MarshalToIntPtr()
{
IntPtr hdrPtr;
if (Environment.OSVersion.Platform == PlatformID.Unix)
{
// setup the structure to marshal
PcapUnmanagedStructures.pcap_pkthdr_unix pkthdr = new PcapUnmanagedStructures.pcap_pkthdr_unix();
pkthdr.caplen = this.CaptureLength;
pkthdr.len = this.PacketLength;
pkthdr.ts.tv_sec = (IntPtr)this.Seconds;
pkthdr.ts.tv_usec = (IntPtr)this.MicroSeconds;
hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(PcapUnmanagedStructures.pcap_pkthdr_unix)));
Marshal.StructureToPtr(pkthdr, hdrPtr, true);
}
else
{
PcapUnmanagedStructures.pcap_pkthdr_windows pkthdr = new PcapUnmanagedStructures.pcap_pkthdr_windows();
pkthdr.caplen = this.CaptureLength;
pkthdr.len = this.PacketLength;
pkthdr.ts.tv_sec = (int)this.Seconds;
pkthdr.ts.tv_usec = (int)this.MicroSeconds;
hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(PcapUnmanagedStructures.pcap_pkthdr_windows)));
Marshal.StructureToPtr(pkthdr, hdrPtr, true);
}
return hdrPtr;
}
