public override void HandleMessage(FunctionCodePrimary fcp, bool isBroadcast, int address, bool fcb, bool fcv, byte[] msg, int userDataStart, int userDataLength)
{
// check frame count bit if fcv == true
if (fcv)
{
if (CheckFCB(fcb) == false)
{
return;
}
}
switch (fcp)
{
case FunctionCodePrimary.REQUEST_LINK_STATUS:
DebugLog("SLL - REQUEST LINK STATUS");
{
bool accessDemand = applicationLayer.IsClass1DataAvailable();
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.STATUS_OF_LINK_OR_ACCESS_DEMAND, linkLayerAddress, accessDemand, false);
}
break;
case FunctionCodePrimary.RESET_REMOTE_LINK:
DebugLog("SLL - RESET REMOTE LINK");
{
expectedFcb = true;
if (linkLayer.linkLayerParameters.UseSingleCharACK)
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, false, false);
}
applicationLayer.ResetCUReceived(false);
}
break;
case FunctionCodePrimary.RESET_FCB:
DebugLog("SLL - RESET FCB");
{
expectedFcb = true;
if (linkLayer.linkLayerParameters.UseSingleCharACK)
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, false, false);
}
applicationLayer.ResetCUReceived(true);
}
break;
case FunctionCodePrimary.REQUEST_USER_DATA_CLASS_2:
DebugLog("SLL - REQUEST USER DATA CLASS 2");
{
BufferFrame asdu = applicationLayer.GetCLass2Data();
bool accessDemand = applicationLayer.IsClass1DataAvailable();
if (asdu != null)
{
linkLayer.SendVariableLengthFrameSecondary(FunctionCodeSecondary.RESP_USER_DATA, linkLayerAddress, accessDemand, false, asdu);
}
else
{
if (linkLayer.linkLayerParameters.UseSingleCharACK && (accessDemand == false))
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.RESP_NACK_NO_DATA, linkLayerAddress, accessDemand, false);
}
}
}
break;
case FunctionCodePrimary.REQUEST_USER_DATA_CLASS_1:
DebugLog("SLL - REQUEST USER DATA CLASS 1");
{
BufferFrame asdu = applicationLayer.GetClass1Data();
bool accessDemand = applicationLayer.IsClass1DataAvailable();
if (asdu != null)
{
linkLayer.SendVariableLengthFrameSecondary(FunctionCodeSecondary.RESP_USER_DATA, linkLayerAddress, accessDemand, false, asdu);
}
else
{
if (linkLayer.linkLayerParameters.UseSingleCharACK && (accessDemand == false))
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.RESP_NACK_NO_DATA, linkLayerAddress, accessDemand, false);
}
}
}
break;
case FunctionCodePrimary.USER_DATA_CONFIRMED:
DebugLog("SLL - USER DATA CONFIRMED");
if (userDataLength > 0)
{
if (applicationLayer.HandleReceivedData(msg, isBroadcast, userDataStart, userDataLength))
{
bool accessDemand = applicationLayer.IsClass1DataAvailable();
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, accessDemand, false);
}
}
break;
case FunctionCodePrimary.USER_DATA_NO_REPLY:
DebugLog("SLL - USER DATA NO REPLY");
if (userDataLength > 0)
{
applicationLayer.HandleReceivedData(msg, isBroadcast, userDataStart, userDataLength);
}
break;
default:
DebugLog("SLL - UNEXPECTED LINK LAYER MESSAGE");
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.LINK_SERVICE_NOT_IMPLEMENTED, linkLayerAddress, false, false);
break;
}
}
public override void HandleMessage(FunctionCodePrimary fcp, bool isBroadcast, bool fcb, bool fcv, byte[] msg, int userDataStart, int userDataLength)
{
if (fcv)
{
if (CheckFCB(fcb) == false)
{
return;
}
}
switch (fcp)
{
case FunctionCodePrimary.RESET_REMOTE_LINK:
expectedFcb = true;
DebugLog("SLL - RECV RESET REMOTE LINK");
if (linkLayer.linkLayerParameters.UseSingleCharACK)
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, false, false);
}
break;
case FunctionCodePrimary.TEST_FUNCTION_FOR_LINK:
DebugLog("SLL -TEST FUNCTION FOR LINK");
// TODO check if DCF has to be sent
if (linkLayer.linkLayerParameters.UseSingleCharACK)
{
linkLayer.SendSingleCharACK();
}
else
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, false, false);
}
break;
case FunctionCodePrimary.USER_DATA_CONFIRMED:
DebugLog("SLL - USER DATA CONFIRMED");
if (userDataLength > 0)
{
if (HandleApplicationLayer(msg, userDataStart, userDataLength))
{
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.ACK, linkLayerAddress, false, false);
}
}
break;
case FunctionCodePrimary.USER_DATA_NO_REPLY:
DebugLog("SLL - USER DATA NO REPLY");
if (userDataLength > 0)
{
HandleApplicationLayer(msg, userDataStart, userDataLength);
}
break;
case FunctionCodePrimary.REQUEST_LINK_STATUS:
DebugLog("SLL - RECV REQUEST LINK STATUS");
SendStatusOfLink(linkLayerAddress);
break;
default:
DebugLog("SLL - UNEXPECTED LINK LAYER MESSAGE");
linkLayer.SendFixedFrameSecondary(FunctionCodeSecondary.LINK_SERVICE_NOT_IMPLEMENTED, linkLayerAddress, false, false);
break;
}
}
