public override void Write(byte[] buffer, int offset, int payloadLength, ILayer previousLayer, ILayer nextLayer)
{
EthernetType ethernetType = EthernetBaseLayer.GetEthernetType(this.EtherType, nextLayer);
MacAddress destination = this.Destination;
IEthernetNextLayer ethernetNextLayer = nextLayer as IEthernetNextLayer;
if (destination == MacAddress.Zero && ethernetNextLayer != null && ethernetNextLayer.PreviousLayerDefaultDestination.HasValue)
{
destination = ethernetNextLayer.PreviousLayerDefaultDestination.Value;
}
EthernetDatagram.WriteHeader(buffer, offset, this.Source, destination, ethernetType);
}
private static void CreateRandomEthernetPayload(Random random, EthernetBaseLayer ethernetBaseLayer, List<ILayer> layers)
{
if (random.NextBool(20))
{
// Finish with payload.
PayloadLayer payloadLayer = random.NextPayloadLayer(random.Next(100));
layers.Add(payloadLayer);
return;
}
ethernetBaseLayer.EtherType = EthernetType.None;
switch (random.NextInt(0, 7))
{
case 0: // VLanTaggedFrame.
case 1:
VLanTaggedFrameLayer vLanTaggedFrameLayer = random.NextVLanTaggedFrameLayer();
layers.Add(vLanTaggedFrameLayer);
CreateRandomEthernetPayload(random, vLanTaggedFrameLayer, layers);
return;
case 2: // ARP.
EthernetLayer ethernetLayer = (ethernetBaseLayer as EthernetLayer);
if (ethernetLayer != null)
ethernetLayer.Destination = MacAddress.Zero;
layers.Add(random.NextArpLayer());
return;
case 3: // IPv4.
case 4:
IpV4Layer ipV4Layer = random.NextIpV4Layer();
layers.Add(ipV4Layer);
CreateRandomIpPayload(random, ipV4Layer, layers);
return;
case 5: // IPv6
case 6:
IpV6Layer ipV6Layer = random.NextIpV6Layer(random.NextBool(20));
layers.Add(ipV6Layer);
CreateRandomIpPayload(random, ipV6Layer, layers);
return;
default:
throw new InvalidOperationException("Invalid value.");
}
}
public override void Write(byte[] buffer, int offset, int payloadLength, ILayer previousLayer, ILayer nextLayer)
{
EthernetType ethernetType = EthernetBaseLayer.GetEthernetType(this.EtherType, nextLayer);
VLanTaggedFrameDatagram.WriteHeader(buffer, offset, this.PriorityCodePoint, this.CanonicalFormatIndicator, this.VLanIdentifier, ethernetType);
}