void myConnection_PDURecieved(Pdu pdu)
{
byte[] pdu_bt = pdu.ToBytes();
byte[] data = new byte[pdu_bt.Length + 3]; //+3 Bytes (COTP)
Array.Copy(pdu_bt, 0, data, 3, pdu_bt.Length);
//COTP
data[0] = 2;
data[1] = 0xf0;
data[2] = 0x80;
listBox1.Invoke(
(MethodInvoker) delegate() { listBox1.Items.Add("Send (TCP): " + ByteExtensions.ToHexString(data)); });
myTCPServer.SendData(data);
}
private Pdu ExchangePdu(Pdu myPdu)
{
ushort pduNrInt;
byte[] ret;
lock (lockpdu)
{
pduNr++;
if (pduNr >= ushort.MaxValue)
pduNr = 1;
pduNrInt = pduNr;
myPdu.header.number = pduNr;
//int res;
//*(dc->msgOut + 6) = 0x80;
//*(dc->msgOut + 5) = 0xf0;
//*(dc->msgOut + 4) = 0x02;
//_daveSendISOPacket(dc, 3 + p->hlen + p->plen + p->dlen);
byte[] pdu_b = myPdu.ToBytes();
byte[] _message = new byte[pdu_b.Length + 3];
_message[0] = 0x02;
_message[1] = 0xf0;
_message[2] = 0x80;
Array.Copy(pdu_b, 0, _message, 3, pdu_b.Length);
sendISOPacket(_message);
ret = ReceiveData();
if (ret != null && ret.Length == 7)
{
//if (daveDebug & daveDebugByte)
// LOG1("CPU sends funny 7 byte packets.\n");
ret = ReceiveData();
}
if (ret == null) return new Pdu(); //daveResTimeout;
/*if (daveDebug & daveDebugExchange)
{
LOG3("%s _daveExchangeTCP res from read %d\n", dc->iface->name, res);
}*/
if (ret.Length <= daveConst.ISOTCPminPacketLength) return new Pdu(); //daveResShortPacket;
//Interface.ExchangePdu(myPdu, this);
}
//Todo: maybe implement a Timeout here!
//while (RecievedPdus[pduNrInt] == null)
//{ }
byte[] res = new byte[ret.Length - 7];
Array.Copy(ret, 7, res, 0, ret.Length - 7);
Pdu retVal = new Pdu(res);
//RecievedPdus.Remove(pduNrInt);
return retVal;
}
public void SendPdu(Pdu pdu, Connection connection)
{
if (!Disposed)
{
byte[] pdubytes = pdu.ToBytes();
S7OexchangeBlock fdr = new S7OexchangeBlock();
fdr.user = (ushort) connection.ConnectionNumber;
fdr.subsystem = 64;
fdr.opcode = 6;
fdr.response = 255;
fdr.fill_length_1 = (byte) pdubytes.Length;
fdr.seg_length_1 = (byte) pdubytes.Length;
fdr.application_block_opcode = connection.application_block_opcode;
//if (!connection.ConnectionConfig.ConnectionToEthernet)
fdr.application_block_subsystem = connection.application_block_subsystem;
fdr.headerlength = 80; //Length of the Header (always 80) (but the 4 first unkown bytes are not count)
fdr.rb_type = 2; //rb_type is always 2
fdr.offset_1 = 80; //Offset of the Begin of userdata (but the 4 first unkown bytes are not count)
fdr.user_data_1 = new byte[260];
Array.Copy(pdubytes, fdr.user_data_1, pdubytes.Length);
int len = Marshal.SizeOf(fdr);
byte[] buffer = new byte[len];
IntPtr ptr = Marshal.AllocHGlobal(len);
Marshal.StructureToPtr(fdr, ptr, true);
Marshal.Copy(ptr, buffer, 0, len);
Marshal.FreeHGlobal(ptr);
int ret = SCP_send(_connectionHandle, (ushort)(fdr.seg_length_1 + fdr.headerlength), buffer);
if (ret < 0)
throw new S7OnlineException(SCP_get_errno());
}
else
{
throw new ObjectDisposedException(this.ToString());
}
}