internal static void IPv4Handler(byte[] packetData)
{
IPPacket ip_packet = new IPPacket(packetData);
Kernel.debugger.Send("[Received] " + ip_packet.ToString());
if (ip_packet.SourceIP == null)
{
Kernel.debugger.Send("SourceIP null in IPv4Handler!");
}
ARPCache.Update(ip_packet.SourceIP, ip_packet.SourceMAC);
if ((NetworkStack.AddressMap.ContainsKey(ip_packet.DestinationIP.Hash) == true) ||
(ip_packet.DestinationIP.address[3] == 255))
{
switch (ip_packet.Protocol)
{
case 1:
ICMPPacket.ICMPHandler(packetData);
break;
/*case 6:
* TCPPacket.TCPHandler(packetData);
* break;*/
case 17:
UDPPacket.UDPHandler(packetData);
break;
}
}
else if (NetworkStack.MACMap.ContainsKey(ip_packet.DestinationMAC.Hash))
{
DHCPPacket.DHCPHandler(packetData);
}
}
internal static void ICMPHandler(byte[] packetData)
{
Apps.System.Debugger.debugger.Send("ICMP Handler called");
ICMPPacket icmp_packet = new ICMPPacket(packetData);
switch (icmp_packet.ICMP_Type)
{
case 0:
recvd_reply = new ICMPEchoReply(packetData);
Apps.System.Debugger.debugger.Send("Received ICMP Echo reply from " + recvd_reply.SourceIP.ToString());
break;
case 8:
ICMPEchoRequest request = new ICMPEchoRequest(packetData);
Apps.System.Debugger.debugger.Send("Received " + request.ToString());
ICMPEchoReply reply = new ICMPEchoReply(request);
Apps.System.Debugger.debugger.Send("Sending ICMP Echo reply to " + reply.DestinationIP.ToString());
OutgoingBuffer.AddPacket(reply);
NetworkStack.Update();
break;
}
}
