/// <summary>
/// Closes this adapter
/// </summary>
public virtual void Close()
{
if (PcapHandle == IntPtr.Zero)
{
return;
}
if (Started)
{
try
{
StopCapture();
}
catch (Exception) { }
}
LibPcapSafeNativeMethods.pcap_close(PcapHandle);
PcapHandle = IntPtr.Zero;
//Remove event handlers
if (OnPacketArrival != null)
{
foreach (PacketArrivalEventHandler pa in OnPacketArrival.GetInvocationList())
{
OnPacketArrival -= pa;
}
}
}
/// <summary>
/// Returns true if the filter expression was able to be compiled into a
/// program without errors
/// </summary>
public static bool CheckFilter(string filterExpression,
out string errorString)
{
IntPtr fakePcap = LibPcapSafeNativeMethods.pcap_open_dead((int)PacketDotNet.LinkLayers.Ethernet, Pcap.MAX_PACKET_SIZE);
uint mask = 0;
if (!CompileFilter(fakePcap, filterExpression, mask, out IntPtr bpfProgram, out errorString))
{
LibPcapSafeNativeMethods.pcap_close(fakePcap);
return(false);
}
FreeBpfProgram(bpfProgram);
LibPcapSafeNativeMethods.pcap_close(fakePcap);
return(true);
}
private static bool GetIsHardwareAccelerated()
{
var handle = LibPcapSafeNativeMethods.pcap_open_dead(1, 60);
try
{
pcap_send_queue queue = default;
LibPcapSafeNativeMethods.pcap_sendqueue_transmit(handle, ref queue, 0);
return(true);
}
catch (TypeLoadException)
{
// Function pcap_sendqueue_transmit not found
return(false);
}
finally
{
LibPcapSafeNativeMethods.pcap_close(handle);
}
}
/// <summary>
/// Closes this adapter
/// </summary>
public virtual void Close()
{
//Remove event handlers
OnPacketArrival = null;
if (PcapHandle == IntPtr.Zero)
{
return;
}
if (Started)
{
try
{
StopCapture();
}
catch (Exception) { }
}
LibPcapSafeNativeMethods.pcap_close(PcapHandle);
PcapHandle = IntPtr.Zero;
}
protected override bool ReleaseHandle()
{
LibPcapSafeNativeMethods.pcap_close(handle);
return(true);
}