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);
}
/// <summary>
/// Checks for available ARP messages and updates the ARP table.
/// </summary>
/// <param name="fInputFrame">A frame to analyze.</param>
private void AnalyzeARP(Frame fInputFrame)
{
ARP.ARPFrame fArpFrame = GetARPFrame(fInputFrame);
if (fArpFrame != null)
{
MACAddress macMacAddress = fArpFrame.SourceMAC;
IPAddress ipAddress = fArpFrame.SourceIP;
if (!macMacAddress.IsEmpty) //Check the addresses
{
if (!this.UsesSpoofedAddress(macMacAddress)) //If none of the addresses is contained in the spoof lists
{
UpdateAddressTable(macMacAddress, ipAddress);
}
}
}
}