254 lines
9.1 KiB
Python
254 lines
9.1 KiB
Python
#!/usr/bin/env python3
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"""
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Mock SCADA Server for Testing
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Simulates a real SCADA system with OPC UA and Modbus interfaces
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"""
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import asyncio
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import logging
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import random
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import time
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from datetime import datetime
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from typing import Dict, Any
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# OPC UA imports
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try:
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from asyncua import Server, Node
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OPCUA_AVAILABLE = True
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except ImportError:
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OPCUA_AVAILABLE = False
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print("Warning: asyncua not available. Install with: pip install asyncua")
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# Modbus imports
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try:
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from pymodbus.server import StartTcpServer
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from pymodbus.datastore import ModbusSequentialDataBlock
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from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
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MODBUS_AVAILABLE = True
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except ImportError:
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MODBUS_AVAILABLE = False
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print("Warning: pymodbus not available. Install with: pip install pymodbus")
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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class MockSCADAServer:
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"""Mock SCADA server that simulates industrial control systems"""
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def __init__(self):
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self.opcua_server = None
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self.modbus_server = None
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self.running = False
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# Simulated process data
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self.process_data = {
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'temperature': 25.0,
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'pressure': 101.3,
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'flow_rate': 100.0,
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'level': 50.0,
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'valve_position': 75.0,
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'pump_status': True,
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'alarm_status': False,
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'setpoint': 100.0
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}
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# Historical data for trends
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self.historical_data = {
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'temperature': [],
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'pressure': [],
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'flow_rate': []
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}
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async def start_opcua_server(self, endpoint: str = "opc.tcp://0.0.0.0:4840"):
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"""Start OPC UA server"""
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if not OPCUA_AVAILABLE:
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logger.warning("OPC UA not available, skipping OPC UA server")
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return
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try:
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self.opcua_server = Server()
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await self.opcua_server.init()
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self.opcua_server.set_endpoint(endpoint)
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self.opcua_server.set_server_name("Mock SCADA Server")
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# Setup namespace
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uri = "http://mock-scada.org"
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idx = await self.opcua_server.register_namespace(uri)
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# Create object node
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objects = self.opcua_server.get_objects_node()
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scada_object = await objects.add_object(idx, "SCADA_System")
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# Add process variables
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self.opcua_nodes = {}
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for name, value in self.process_data.items():
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if isinstance(value, bool):
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node = await scada_object.add_variable(idx, name, value)
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elif isinstance(value, (int, float)):
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node = await scada_object.add_variable(idx, name, float(value))
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else:
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continue
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await node.set_writable()
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self.opcua_nodes[name] = node
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await self.opcua_server.start()
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logger.info(f"Mock OPC UA server started at {endpoint}")
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except Exception as e:
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logger.error(f"Failed to start OPC UA server: {e}")
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def start_modbus_server(self, port: int = 502):
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"""Start Modbus TCP server"""
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if not MODBUS_AVAILABLE:
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logger.warning("Modbus not available, skipping Modbus server")
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return
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try:
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# Create data blocks
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store = ModbusSlaveContext(
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di=ModbusSequentialDataBlock(0, [0]*100), # Discrete Inputs
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co=ModbusSequentialDataBlock(0, [0]*100), # Coils
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hr=ModbusSequentialDataBlock(0, [0]*100), # Holding Registers
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ir=ModbusSequentialDataBlock(0, [0]*100) # Input Registers
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)
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context = ModbusServerContext(slaves=store, single=True)
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# Start server in background thread
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import threading
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def run_modbus_server():
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StartTcpServer(context=context, address=("0.0.0.0", port))
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modbus_thread = threading.Thread(target=run_modbus_server, daemon=True)
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modbus_thread.start()
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self.modbus_server = modbus_thread
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logger.info(f"Mock Modbus server started on port {port}")
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except Exception as e:
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logger.error(f"Failed to start Modbus server: {e}")
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async def update_process_data(self):
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"""Update simulated process data"""
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while self.running:
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try:
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# Simulate realistic process variations
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self.process_data['temperature'] += random.uniform(-0.5, 0.5)
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self.process_data['temperature'] = max(20.0, min(80.0, self.process_data['temperature']))
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self.process_data['pressure'] += random.uniform(-0.1, 0.1)
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self.process_data['pressure'] = max(95.0, min(110.0, self.process_data['pressure']))
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self.process_data['flow_rate'] += random.uniform(-2.0, 2.0)
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self.process_data['flow_rate'] = max(0.0, min(200.0, self.process_data['flow_rate']))
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self.process_data['level'] += random.uniform(-1.0, 1.0)
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self.process_data['level'] = max(0.0, min(100.0, self.process_data['level']))
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# Simulate valve and pump behavior
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if self.process_data['flow_rate'] > 150:
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self.process_data['valve_position'] = max(0, self.process_data['valve_position'] - 1)
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elif self.process_data['flow_rate'] < 50:
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self.process_data['valve_position'] = min(100, self.process_data['valve_position'] + 1)
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# Simulate alarms
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self.process_data['alarm_status'] = (
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self.process_data['temperature'] > 75.0 or
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self.process_data['pressure'] > 108.0 or
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self.process_data['level'] > 95.0
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)
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# Update OPC UA nodes if available
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if self.opcua_server and self.opcua_nodes:
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for name, node in self.opcua_nodes.items():
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await node.write_value(self.process_data[name])
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# Store historical data
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timestamp = datetime.now()
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self.historical_data['temperature'].append({
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'timestamp': timestamp,
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'value': self.process_data['temperature']
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})
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self.historical_data['pressure'].append({
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'timestamp': timestamp,
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'value': self.process_data['pressure']
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})
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self.historical_data['flow_rate'].append({
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'timestamp': timestamp,
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'value': self.process_data['flow_rate']
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})
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# Keep only last 1000 points
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for key in self.historical_data:
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if len(self.historical_data[key]) > 1000:
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self.historical_data[key] = self.historical_data[key][-1000:]
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await asyncio.sleep(1) # Update every second
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except Exception as e:
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logger.error(f"Error updating process data: {e}")
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await asyncio.sleep(5)
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def get_status(self) -> Dict[str, Any]:
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"""Get server status"""
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return {
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'running': self.running,
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'opcua_available': OPCUA_AVAILABLE and self.opcua_server is not None,
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'modbus_available': MODBUS_AVAILABLE and self.modbus_server is not None,
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'process_data': self.process_data,
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'data_points': sum(len(data) for data in self.historical_data.values())
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}
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async def start(self):
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"""Start the mock SCADA server"""
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if self.running:
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return
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self.running = True
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# Start servers
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await self.start_opcua_server()
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self.start_modbus_server()
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# Start data update loop
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self.update_task = asyncio.create_task(self.update_process_data())
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logger.info("Mock SCADA server started")
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async def stop(self):
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"""Stop the mock SCADA server"""
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self.running = False
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if hasattr(self, 'update_task'):
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self.update_task.cancel()
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try:
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await self.update_task
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except asyncio.CancelledError:
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pass
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if self.opcua_server:
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await self.opcua_server.stop()
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logger.info("Mock SCADA server stopped")
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async def main():
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"""Main function to run the mock SCADA server"""
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server = MockSCADAServer()
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try:
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await server.start()
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# Keep server running
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while True:
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await asyncio.sleep(1)
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except KeyboardInterrupt:
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print("\nShutting down mock SCADA server...")
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await server.stop()
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if __name__ == "__main__":
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asyncio.run(main()) |