//dirt simple is the name of the game
public static void ProcessIncomingPacket(Bytes packet, IAdapter adapter)
{
IpHeader ipHeader = new IpHeader(packet, EthernetHeader.Size);
//since we apparently don't support fragments yet.
if (ipHeader.MoreFragmentsFollowing() == true)
{
DebugPrint("ACK! ip fragmentation!\n");
return;
}
// DebugStub.Assert(ipHeader.MoreFragmentsFollowing() == false);
//VTable.Assert(ipHeader.MoreFragmentsFollowing() == false);
if (ipHeader.IsChecksumValid() == false)
{
DebugPrint("ProcessIncomingPacket: bad checksum...dropping packets\n");
//delete packet;
return;
}
//make sure the address is 'local'
if (hostConfiguration == null)
{
DebugPrint("ACK hostConfiguration is NULL\n");
return;
}
if ((hostConfiguration.IsLocalAddress(ipHeader.destAddress) == false) &&
(ipHeader.destAddress != IPv4.Broadcast))
{
// DebugPrint("ProcessIncomingPacket: wrong address ...dropping packets\n");
// DebugPrint("Dest address {0}\n", ipHeader.destAddress);
//delete packet;
return;
}
try {
//figure out to which protocol the packet belongs
switch (ipHeader.protocol)
{
case IpHeader.TCP:
DebugPrint("ProcessIncomingPacket: Got TCP packet\n");
//TCP.ProcessIncomingPacket(packet, ipHeader);
break;
case IpHeader.UDP:
//DebugPrint("ProcessIncomingPacket: Got UDP packet\n");
UDP.ProcessIncomingPacket(packet, ipHeader);
break;
case IpHeader.ICMP:
DebugPrint("ProcessIncomingPacket: Got ICMP packet\n");
//delete packet;
break;
default:
DebugPrint("Got unexpected packet!!\n");
//delete packet;
DebugStub.Break();
break;
}
}
catch (Exception e) {
DebugStub.Print("Caught exception {0}\n", DebugStub.ArgList(e));
DebugStub.Break();
}
}
