public NetPacket CreatePacket()
{
NetPacket nPK = new NetPacket();
byte[] PLbytes = _pl.GetBytes();
int counter = 0;
//byte[] rawbytes = new byte[PLbytes.Length + hlen];
nPK.size = PLbytes.Length + hlen;
NetLib.WriteByteArray(nPK.buffer, ref counter, DestinationMAC);
NetLib.WriteByteArray(nPK.buffer, ref counter, SourceMAC);
//
DataLib.WriteUInt16(nPK.buffer, ref counter, proto);
//
NetLib.WriteByteArray(nPK.buffer, ref counter, PLbytes);
return(nPK);
}
public EthernetFrame(NetPacket pkt)
{
_pkt = pkt;
int offset = 0;
NetLib.ReadByteArray(pkt.buffer, ref offset, 6, out DestinationMAC);
//WriteLine("eth dst MAC :" + DestinationMAC[0] + ":" + DestinationMAC[1] + ":" + DestinationMAC[2] + ":" + DestinationMAC[3] + ":" + DestinationMAC[4] + ":" + DestinationMAC[5]);
NetLib.ReadByteArray(pkt.buffer, ref offset, 6, out SourceMAC);
//WriteLine("src MAC :" + SourceMAC[0] + ":" + SourceMAC[1] + ":" + SourceMAC[2] + ":" + SourceMAC[3] + ":" + SourceMAC[4] + ":" + SourceMAC[5]);
hlen = 14; //(6+6+2)
//NOTE: we don't have to worry about the Ethernet Frame CRC as it is not included in the packet
DataLib.ReadUInt16(pkt.buffer, ref offset, out proto);
switch (proto) //Note, Diffrent Edian
{
case (UInt16)EtherFrameType.NULL:
break;
case (UInt16)EtherFrameType.IPv4:
_pl = new IP.IPPacket(this);
break;
case (UInt16)EtherFrameType.ARP:
_pl = new ARP.ARPPacket(this);
break;
case (UInt16)EtherFrameType.VLAN_TAGGED_FRAME:
//Error.WriteLine("VLAN-tagged frame (IEEE 802.1Q)");
//Also check if VLAN-tagged frames trigger oversized
//warnings
throw new NotImplementedException();
//break;
default:
PSE.CLR_PSE_PluginLog.WriteLine(TraceEventType.Error, (int)DEV9LogSources.ETHFrame, "Unkown Ethernet Protocol " + proto.ToString("X4"));
break;
}
}
