private void SendARPRequest(IPAddress ipaDestination, IPAddress ipaSource)
{
eExNetworkLibrary.ARP.ARPFrame arpRequest = new eExNetworkLibrary.ARP.ARPFrame();
arpRequest.SourceIP = ipaSource;
arpRequest.SourceMAC = this.PrimaryMACAddress;
arpRequest.DestinationMAC = MACAddress.Empty;
arpRequest.HardwareAddressType = HardwareAddressType.Ethernet;
arpRequest.DestinationIP = ipaDestination;
if (ipaSource.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
arpRequest.ProtocolAddressType = EtherType.IPv4;
}
else if (ipaSource.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
{
arpRequest.ProtocolAddressType = EtherType.IPv6;
}
EthernetFrame ethFrame = new EthernetFrame();
ethFrame.Source = this.PrimaryMACAddress;
ethFrame.Destination = new MACAddress(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF });
ethFrame.EncapsulatedFrame = arpRequest;
ethFrame.EtherType = eExNetworkLibrary.EtherType.ARP;
TrafficDescriptionFrame tdf = new TrafficDescriptionFrame(null, DateTime.Now);
tdf.EncapsulatedFrame = ethFrame;
this.Send(ethFrame);
}
private void AnalyzeICMP(TrafficDescriptionFrame tdf)
{
IPFrame ipFrame = GetIPv6Frame(tdf);
NeighborAdvertisment icmpNeighborAdvertisment = (NeighborAdvertisment)GetFrameByType(tdf, NeighborAdvertisment.DefaultFrameType);
NeighborSolicitation icmpNeighborSolicitation = (NeighborSolicitation)GetFrameByType(tdf, NeighborSolicitation.DefaultFrameType);
if (ipFrame != null && icmpNeighborAdvertisment != null && icmpNeighborAdvertisment.EncapsulatedFrame != null)
{
NeighborDiscoveryOption ndOption = (NeighborDiscoveryOption)GetFrameByType(icmpNeighborAdvertisment, NeighborDiscoveryOption.DefaultFrameType);
if (ndOption.OptionData != null && ndOption.OptionType == NeighborDiscoveryOptionType.TargetLinkLayerAddress)
{
MACAddress macTarget = new MACAddress(ndOption.OptionData);
if (!UsesSpoofedAddress(macTarget))
{
if (!(arpHostTable.Contains(icmpNeighborAdvertisment.TargetAddress) && !icmpNeighborAdvertisment.OverrideFlag))
{
UpdateAddressTable(macTarget, icmpNeighborAdvertisment.TargetAddress);
}
}
}
}
else if (ipFrame != null && icmpNeighborSolicitation != null && icmpNeighborSolicitation.EncapsulatedFrame != null)
{
NeighborDiscoveryOption ndOption = (NeighborDiscoveryOption)GetFrameByType(icmpNeighborSolicitation, NeighborDiscoveryOption.DefaultFrameType);
if (ndOption.OptionData != null && ndOption.OptionType == NeighborDiscoveryOptionType.SourceLinkLayerAddress)
{
MACAddress macTarget = new MACAddress(ndOption.OptionData);
if (!UsesSpoofedAddress(macTarget))
{
UpdateAddressTable(macTarget, ipFrame.SourceAddress);
}
}
}
}
void ProcessReceivedData(byte[] bBacketData, WinPcapCaptureHeader wpcHeader)
{
EthernetFrame fFrame = new EthernetFrame(bBacketData);
if (!(bExcludeLocalHostTraffic && IsLocalHostTraffic(fFrame)) && (bPromiscousMode || IsAddressedForThisInterface(fFrame)))
{
TrafficDescriptionFrame tdf = new TrafficDescriptionFrame(this, wpcHeader.Timestamp);
tdf.EncapsulatedFrame = fFrame;
AnalyzeARP(tdf);
AnalyzeICMP(tdf);
InvokeFrameForwarded();
InvokePacketCaptured(tdf);
if (OutputHandler != null)
{
NotifyNext(tdf);
}
if (AutoAnswerARPRequests)
{
HandleARP(fFrame);
HandleICMP(fFrame);
}
}
}
/// <summary>
/// Clones this frame.
/// </summary>
/// <returns>An identic clone of this frame</returns>
public override Frame Clone()
{
Frame f = new TrafficDescriptionFrame(iSourceInterface, new DateTime(dtCaptureTime.Ticks));
if (this.EncapsulatedFrame != null)
{
f.EncapsulatedFrame = this.EncapsulatedFrame.Clone();
}
return(f);
}
private void MainWorkingLoop()
{
byte[] bFrameBytes = null;
int iCount = 0;
try
{
while (bRun)
{
lock (qFrameQueue)
{
iCount = qFrameQueue.Count;
}
while (iCount > 0)
{
try
{
lock (qFrameQueue)
{
bFrameBytes = qFrameQueue.Dequeue();
}
if (bFrameBytes != null)
{
lock (oInterfaceStartStopLock)
{
wpcDevice.SendPacket(bFrameBytes);
}
}
}
catch (Exception ex)
{
TrafficDescriptionFrame tdf = new TrafficDescriptionFrame(this, DateTime.Now);
tdf.EncapsulatedFrame = new RawDataFrame(bFrameBytes);
PushDroppedFrame(tdf);
InvokeExceptionThrown(ex);
}
lock (qFrameQueue)
{
iCount = qFrameQueue.Count;
}
}
areWorkToDo.WaitOne();
}
}
finally
{
lock (qFrameQueue)
{
qFrameQueue.Clear();
}
}
}
