/// <summary>
/// Invoked on behalf of PHY whenever new data has been received.
/// </summary>
/// <param name="data">The data that was received.</param>
void OnDataReceived(byte[] data)
{
data.ThrowIfNull("data");
var frame = Frame.Deserialize(data);
WriteMac("Received an Ethernet frame.");
// Compute checksum and compare to the one contained in the frame.
var fcs = Frame.ComputeCheckSequence(frame);
if (fcs != frame.CheckSequence)
{
WriteMac("Detected a bad frame check sequence, discarding.");
return;
}
// Drop our own frames.
if (frame.Source == MacAddress)
{
return;
}
// Examine the frame and see if it's for us; If not, discard it.
if (frame.Destination != MacAddress &&
frame.Destination != broadcastAddress)
{
WriteMac("Recipient mismatch, discarding.");
return;
}
//Extract the payload and hand it up to the Network layer.
InterruptReason = Lan.Interrupt.DataReceived;
Interrupt.RaiseEvent(this,
new DataReceivedEventArgs(frame.Payload, frame.Type));
}
/// <summary>
/// Invoked on behalf of PHY whenever new data has been received.
/// </summary>
/// <param name="connector"></param>
/// <param name="data">The data that was received.</param>
void OnDataReceived(Connector connector, byte[] data)
{
data.ThrowIfNull("data");
WriteMac("Received an Ethernet frame.");
waitTime[connector] = Simulation.Time + interframeGapTime(connector);
var frame = Frame.Deserialize(data);
// Compute checksum and compare to the one contained in the frame.
var fcs = Frame.ComputeCheckSequence(frame);
if (fcs != frame.CheckSequence)
{
WriteMac("Detected a bad frame check sequence, discarding.");
return;
}
// Remember the port through which the frame came in.
forwardTable[frame.Source] = connector;
// If we know the destination and it's on the same port as the
// source, discard the frame.
if (forwardTable.ContainsKey(frame.Destination))
{
if (forwardTable[frame.Source] == forwardTable[frame.Destination])
{
return;
}
}
// Start emptying the FIFO, if we're not already doing it.
if (emptyingFifos == false)
{
Simulation.Callback(0, EmptyFifos);
}
// Enqueue the data.
inputFifo[connector].Enqueue(frame);
}