private static List <WinPcapDevice> Devices(string rpcapString,
RemoteAuthentication remoteAuthentication)
{
var retval = new List <WinPcapDevice>();
var devicePtr = IntPtr.Zero;
var errorBuffer = new StringBuilder(Pcap.PCAP_ERRBUF_SIZE); //will hold errors
// convert the remote authentication structure to unmanaged memory if
// one was specified
IntPtr rmAuthPointer;
if (remoteAuthentication == null)
{
rmAuthPointer = IntPtr.Zero;
}
else
{
rmAuthPointer = remoteAuthentication.GetUnmanaged();
}
int result = SafeNativeMethods.pcap_findalldevs_ex(rpcapString,
rmAuthPointer,
ref devicePtr,
errorBuffer);
// free the memory if any was allocated
if (rmAuthPointer != IntPtr.Zero)
{
Marshal.FreeHGlobal(rmAuthPointer);
}
if (result < 0)
{
throw new PcapException(errorBuffer.ToString());
}
IntPtr nextDevPtr = devicePtr;
while (nextDevPtr != IntPtr.Zero)
{
// Marshal pointer into a struct
var pcap_if_unmanaged =
(LibPcap.PcapUnmanagedStructures.pcap_if)Marshal.PtrToStructure(nextDevPtr,
typeof(LibPcap.PcapUnmanagedStructures.pcap_if));
LibPcap.PcapInterface pcap_if = new LibPcap.PcapInterface(pcap_if_unmanaged);
retval.Add(new WinPcapDevice(pcap_if));
nextDevPtr = pcap_if_unmanaged.Next;
}
LibPcap.LibPcapSafeNativeMethods.pcap_freealldevs(devicePtr); // Free unmanaged memory allocation.
return(retval);
}
private static List <NPcapDevice> BuildDeviceList(IntPtr devicePtr)
{
var retval = new List <NPcapDevice>();
IntPtr nextDevPtr = devicePtr;
while (nextDevPtr != IntPtr.Zero)
{
// Marshal pointer into a struct
var pcap_if_unmanaged =
(LibPcap.PcapUnmanagedStructures.pcap_if)Marshal.PtrToStructure(nextDevPtr,
typeof(LibPcap.PcapUnmanagedStructures.pcap_if));
LibPcap.PcapInterface pcap_if = new LibPcap.PcapInterface(pcap_if_unmanaged);
retval.Add(new NPcapDevice(pcap_if));
nextDevPtr = pcap_if_unmanaged.Next;
}
return(retval);
}
