public Packet(int fragments)
{
this.toDeviceFlags = 0;
this.fromDeviceFlags = 0;
this.fragments = new PacketFragment[fragments];
for (int i = 0; i < fragments; i++)
{
this.fragments[i] = new PacketFragment();
}
}
private FromDeviceFlags GetRecvPktFlags(uint stat_err_flags)
{
FromDeviceFlags fromDevFlags = 0;
if (((RxErrStatFields.CRC_ERROR | RxErrStatFields.SYMBOL_ERROR |
RxErrStatFields.SEQUENCE_ERROR | RxErrStatFields.CARRIER_EXT_ERROR |
RxErrStatFields.RX_DATA_ERROR) & stat_err_flags) != 0)
{
Intel.DebugPrint("Packet Rsv Error\n");
fromDevFlags |= FromDeviceFlags.ReceiveError;
}
else
{
fromDevFlags |= FromDeviceFlags.ReceiveSuccess;
}
if (((stat_err_flags & RxErrStatFields.IGNORE_CHECKSUM) == 0) &&
((stat_err_flags & RxErrStatFields.IP_CHECKSUM_CALC) != 0))
{
if ((stat_err_flags & RxErrStatFields.IP_CHECKSUM_ERROR) != 0)
{
Intel.DebugPrint("Bad Ip Checksum\n");
fromDevFlags |= FromDeviceFlags.BadIp4Checksum;
}
else
{
// Good IP checksum flag???
}
}
if (((stat_err_flags & RxErrStatFields.IGNORE_CHECKSUM) == 0) &&
((stat_err_flags & RxErrStatFields.TCP_CHECKSUM_CALC) != 0))
{
if ((stat_err_flags & RxErrStatFields.TCP_CHECKSUM_ERROR) != 0)
{
fromDevFlags |= (FromDeviceFlags.BadTcp4Checksum |
FromDeviceFlags.BadUdp4Checksum);
// don't know if UDP or TCP
Intel.DebugPrint("Bad TCP/UDP Checksum\n");
}
else
{
fromDevFlags |= (FromDeviceFlags.GoodTcp4Checksum |
FromDeviceFlags.GoodUdp4Checksum);
}
}
//DebugStub.Assert((fromDevFlags == (FromDeviceFlags.ReceiveSuccess)) || (fromDevFlags == (FromDeviceFlags.ReceiveSuccess | FromDeviceFlags.GoodTcp4Checksum | FromDeviceFlags.GoodUdp4Checksum)));
return(fromDevFlags);
}
// Get the received packets from the adapter
void DeMuxReceivedPackets()
{
//Grab the latest set of packets
RxExchange();
PacketFifo newPackets = this.rxFifo.Acquire();
try {
int count = newPackets.Count;
for (int i = 0; i < count; i++)
{
Packet packet = newPackets.Pop();
// If packet from device has an error
// recycle it right away.
FromDeviceFlags fromFlags = packet.FromDeviceFlags;
if ((fromFlags & FromDeviceFlags.ReceiveError) != 0)
{
DebugStub.Print("Packet had error???\n");
newPackets.Push(packet);
continue;
}
Bytes data = packet.ReleaseFragment(0);
Ethernet.ProcessIncomingPacket(data, this);
#if false
if (filterAdapter == null ||
filterAdapter.ProcessIncomingPacket(data))
{
Ethernet.ProcessIncomingPacket(data, this);
}
else
{
//delete data;
}
#endif
//XXX Totally inefficient first try immediately replaces
//the lost data.
Bytes nxtPacket = new Bytes(new byte[this.mtu]);
packet.SetFragment(0, nxtPacket);
newPackets.Push(packet);
}
}
finally {
this.rxFifo.Release(newPackets);
}
}
