protected virtual void handleICMPPacket(IPv4Header datagram, NetworkInterface a)
{
switch (datagram.Datagram[0])
{
case 0: // Echo Replys
{
ICMPEchoRequestReply header = new ICMPEchoRequestReply(datagram.Datagram);
OnICMPPacket?.Invoke(datagram, header, header.Code, a);
}
break;
case 8: // Echo Request
if (respondToEcho)
{
ICMPEchoRequestReply header = new ICMPEchoRequestReply(datagram.Datagram);
ICMPEchoRequestReply icmp = new ICMPEchoRequestReply(0, header.Identifier, (UInt16)(header.SequenceNumber + 1));
IPv4Header ipv4 = new IPv4Header(datagram.Identification, false, false, 255, IPv4Header.ProtocolType.ICMP, a.LocalIP, datagram.SourceAddress, null, icmp.ToBytes());
a.SendPacket(ipv4.ToBytes());
}
break;
}
}
public void onPacket(byte[] datagram)
{
if (on)
{
IPv4Header iP = new IPv4Header(datagram);
if (ip)
{
Log("----------------IP----------------");
Log("Version: " + iP.Version);
Log("HeaderLength: " + iP.IHL);
Log("Type Of Service " + iP.TOS);
Log("Total Length " + iP.Length);
Log("Identification " + iP.Identification);
Log("Reserved " + iP.RES);
Log("Don't Fragment " + iP.DF);
Log("More Fragments " + iP.MF);
Log("Fragment Offset " + iP.FragmentOffset);
Log("Time To Live " + iP.TTL);
Log("Protocol " + iP.Protocol);
Log("Checksum " + iP.HeaderChecksum);
Log("Source Address " + iP.SourceAddress);
Log("Destination Address " + iP.DestinationAddress);
Log("----------------------------------------");
}
switch (iP.Protocol)
{
case IPv4Header.ProtocolType.ICMP:
ICMPEchoRequestReply icmp = new ICMPEchoRequestReply(iP.Datagram);
break;
case IPv4Header.ProtocolType.UDP:
UDPHeader uDP = new UDPHeader(iP.Datagram);
if (udp)
{
Log("----------------UDP----------------");
Log("Source Port " + uDP.SourcePort);
Log("Destination Port " + uDP.DestinationPort);
Log("Length " + uDP.Length);
Log("Checksum " + uDP.Checksum);
Log("----------------------------------------");
}
DHCPDatagram dHCP = new DHCPDatagram(uDP.Datagram);
if (dhcp)
{
Log("----------------DHCP----------------");
Log("Op ");
Log("htype ");
Log("hlen ");
Log("hops ");
Log("transaction ID ");
Log("Secconds Elapsed ");
Log("Flags");
Log(" Boradcast ");
Log("Client IP ");
Log("Your IP ");
Log("Server IP ");
Log("Router IP ");
Log("Client MAC ");
Log("Server Host Name ");
Log("Boot File Name ");
Log("Options");
foreach (DHCPOption option in dHCP.options)
{
switch (option.tag)
{
case Tag.subnetmask:
Log(" SubnetMask " + new IP(option.data).ToString());
break;
case Tag.defaultIPTTL:
Log(" Default TTL " + option.data[0]);
break;
case Tag.addressRequest:
Log(" Requested IP " + new IP(option.data).ToString());
break;
case Tag.addressTime:
Log(" Lease Time " + BitConverter.ToUInt16(option.data, 0));
break;
case Tag.router:
Log(" DHCP Message Type " + option.data[0]);
break;
case Tag.paramaterList:
Log(" Paramater List ");
foreach (byte b in option.data)
{
Log(" " + b);
}
break;
}
}
Log("----------------------------------------");
}
break;
}
}
}
