public void RunStateMachine()
{
PrimaryLinkLayerState newState = primaryState;
long currentTime = SystemUtils.currentTimeMillis();
switch (primaryState)
{
case PrimaryLinkLayerState.IDLE:
waitingForResponse = false;
originalSendTime = 0;
lastSendTime = 0;
sendLinkLayerTestFunction = false;
newState = PrimaryLinkLayerState.EXECUTE_REQUEST_STATUS_OF_LINK;
break;
case PrimaryLinkLayerState.EXECUTE_REQUEST_STATUS_OF_LINK:
if (waitingForResponse)
{
if (currentTime > (lastSendTime + linkLayer.TimeoutForACK))
{
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_LINK_STATUS, address, false, false);
lastSendTime = SystemUtils.currentTimeMillis();
}
}
else
{
DebugLog("[SLAVE " + address + "] PLL - SEND RESET REMOTE LINK");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.RESET_REMOTE_LINK, address, false, false);
lastSendTime = currentTime;
originalSendTime = lastSendTime;
waitingForResponse = true;
nextFcb = true;
newState = PrimaryLinkLayerState.EXECUTE_RESET_REMOTE_LINK;
}
break;
case PrimaryLinkLayerState.EXECUTE_RESET_REMOTE_LINK:
if (waitingForResponse)
{
if (currentTime > (lastSendTime + linkLayer.TimeoutForACK))
{
waitingForResponse = false;
newState = PrimaryLinkLayerState.IDLE;
SetState(LinkLayerState.ERROR);
}
}
else
{
newState = PrimaryLinkLayerState.LINK_LAYERS_AVAILABLE;
SetState(LinkLayerState.AVAILABLE);
}
break;
case PrimaryLinkLayerState.LINK_LAYERS_AVAILABLE:
if (sendLinkLayerTestFunction)
{
DebugLog("[SLAVE " + address + "] PLL - SEND TEST LINK");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.TEST_FUNCTION_FOR_LINK, address, nextFcb, true);
nextFcb = !nextFcb;
lastSendTime = currentTime;
originalSendTime = lastSendTime;
waitingForResponse = true;
newState = PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM;
}
else if (requestClass1Data || requestClass2Data)
{
if (requestClass1Data)
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 10 - REQ UD 1");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_USER_DATA_CLASS_1, address, nextFcb, true);
}
else
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 11 - REQ UD 2");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_USER_DATA_CLASS_2, address, nextFcb, true);
}
nextFcb = !nextFcb;
lastSendTime = currentTime;
originalSendTime = lastSendTime;
waitingForResponse = true;
newState = PrimaryLinkLayerState.EXECUTE_SERVICE_REQUEST_RESPOND;
}
else
{
if (dontSendMessages == false)
{
BufferFrame asdu = nextMessage;
if (asdu != null)
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 03 - USER DATA CONFIRMED");
linkLayer.SendVariableLengthFramePrimary(FunctionCodePrimary.USER_DATA_CONFIRMED, address, nextFcb, true, asdu);
lastSentASDU = nextMessage;
nextMessage = null;
nextFcb = !nextFcb;
lastSendTime = currentTime;
originalSendTime = lastSendTime;
waitingForResponse = true;
newState = PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM;
}
}
}
break;
case PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM:
if (currentTime > (lastSendTime + linkLayer.TimeoutForACK))
{
if (currentTime > (originalSendTime + linkLayer.TimeoutRepeat))
{
DebugLog("[SLAVE " + address + "] TIMEOUT SC: ASDU not confirmed after repeated transmission");
newState = PrimaryLinkLayerState.IDLE;
SetState(LinkLayerState.ERROR);
}
else
{
DebugLog("[SLAVE " + address + "] TIMEOUT SC: 1 ASDU not confirmed");
if (sendLinkLayerTestFunction)
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 02 - RESET REMOTE LINK [REPEAT]");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.TEST_FUNCTION_FOR_LINK, address, !nextFcb, true);
}
else
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 03 - USER DATA CONFIRMED [REPEAT]");
linkLayer.SendVariableLengthFramePrimary(FunctionCodePrimary.USER_DATA_CONFIRMED, address, !nextFcb, true, lastSentASDU);
}
lastSendTime = currentTime;
}
}
break;
case PrimaryLinkLayerState.EXECUTE_SERVICE_REQUEST_RESPOND:
if (currentTime > (lastSendTime + linkLayer.TimeoutForACK))
{
if (currentTime > (originalSendTime + linkLayer.TimeoutRepeat))
{
DebugLog("[SLAVE " + address + "] TIMEOUT: ASDU not confirmed after repeated transmission");
newState = PrimaryLinkLayerState.IDLE;
requestClass1Data = false;
requestClass2Data = false;
SetState(LinkLayerState.ERROR);
}
else
{
DebugLog("[SLAVE " + address + "] TIMEOUT: ASDU not confirmed");
if (requestClass1Data)
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 10 - REQ UD 1 [REPEAT]");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_USER_DATA_CLASS_1, address, !nextFcb, true);
}
else if (requestClass2Data)
{
DebugLog("[SLAVE " + address + "] PLL - SEND FC 11 - REQ UD 2 [REPEAT]");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_USER_DATA_CLASS_2, address, !nextFcb, true);
}
lastSendTime = currentTime;
}
}
break;
case PrimaryLinkLayerState.SECONDARY_LINK_LAYER_BUSY:
//TODO - reject new requests from application layer?
break;
}
if (primaryState != newState)
{
DebugLog("[SLAVE " + address + "] PLL - old state: " + primaryState.ToString() + " new state: " + newState.ToString());
}
primaryState = newState;
}
public override void RunStateMachine()
{
PrimaryLinkLayerState newState = primaryState;
switch (primaryState)
{
case PrimaryLinkLayerState.IDLE:
waitingForResponse = false;
originalSendTime = 0;
lastSendTime = 0;
sendLinkLayerTestFunction = false;
newState = PrimaryLinkLayerState.EXECUTE_REQUEST_STATUS_OF_LINK;
break;
case PrimaryLinkLayerState.EXECUTE_REQUEST_STATUS_OF_LINK:
if (waitingForResponse)
{
if (SystemUtils.currentTimeMillis() > (lastSendTime + linkLayer.TimeoutForACK))
{
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.REQUEST_LINK_STATUS, linkLayerAddressOtherStation, false, false);
lastSendTime = SystemUtils.currentTimeMillis();
}
}
else
{
DebugLog("PLL - SEND RESET REMOTE LINK to address " + linkLayerAddressOtherStation);
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.RESET_REMOTE_LINK, linkLayerAddressOtherStation, false, false);
lastSendTime = SystemUtils.currentTimeMillis();
waitingForResponse = true;
newState = PrimaryLinkLayerState.EXECUTE_RESET_REMOTE_LINK;
}
break;
case PrimaryLinkLayerState.EXECUTE_RESET_REMOTE_LINK:
if (waitingForResponse)
{
if (SystemUtils.currentTimeMillis() > (lastSendTime + linkLayer.TimeoutForACK))
{
waitingForResponse = false;
newState = PrimaryLinkLayerState.IDLE;
SetNewState(LinkLayerState.ERROR);
}
}
else
{
newState = PrimaryLinkLayerState.LINK_LAYERS_AVAILABLE;
SetNewState(LinkLayerState.AVAILABLE);
}
break;
case PrimaryLinkLayerState.LINK_LAYERS_AVAILABLE:
if (sendLinkLayerTestFunction)
{
DebugLog("PLL - SEND TEST LINK");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.TEST_FUNCTION_FOR_LINK, linkLayerAddressOtherStation, nextFcb, true);
nextFcb = !nextFcb;
lastSendTime = SystemUtils.currentTimeMillis();
originalSendTime = lastSendTime;
newState = PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM;
}
else
{
BufferFrame asdu = GetUserData();
if (asdu != null)
{
linkLayer.SendVariableLengthFramePrimary(FunctionCodePrimary.USER_DATA_CONFIRMED, linkLayerAddressOtherStation, nextFcb, true, asdu);
nextFcb = !nextFcb;
lastSendASDU = asdu;
lastSendTime = SystemUtils.currentTimeMillis();
originalSendTime = lastSendTime;
waitingForResponse = true;
newState = PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM;
}
}
break;
case PrimaryLinkLayerState.EXECUTE_SERVICE_SEND_CONFIRM:
if (SystemUtils.currentTimeMillis() > (lastSendTime + linkLayer.TimeoutForACK))
{
if (SystemUtils.currentTimeMillis() > (originalSendTime + linkLayer.TimeoutRepeat))
{
DebugLog("TIMEOUT: ASDU not confirmed after repeated transmission");
newState = PrimaryLinkLayerState.IDLE;
SetNewState(LinkLayerState.ERROR);
}
else
{
DebugLog("TIMEOUT: ASDU not confirmed");
if (sendLinkLayerTestFunction)
{
DebugLog("PLL - REPEAT SEND RESET REMOTE LINK");
linkLayer.SendFixedFramePrimary(FunctionCodePrimary.TEST_FUNCTION_FOR_LINK, linkLayerAddressOtherStation, !nextFcb, true);
}
else
{
DebugLog("PLL - repeat last ASDU");
linkLayer.SendVariableLengthFramePrimary(FunctionCodePrimary.USER_DATA_CONFIRMED, linkLayerAddressOtherStation, !nextFcb, true, lastSendASDU);
}
lastSendTime = SystemUtils.currentTimeMillis();
}
}
break;
case PrimaryLinkLayerState.SECONDARY_LINK_LAYER_BUSY:
//TODO - reject new requests from application layer?
break;
}
if (primaryState != newState)
{
DebugLog("PLL - old state: " + primaryState.ToString() + " new state: " + newState.ToString());
}
primaryState = newState;
}
