Initial commit to mimic Siemens S7 communication

.devcontainer/virtual/docker-compose.yml

@@ -36,6 +36,17 @@ services:
     depends_on:
     - openplc
 
+  s7com:
+    image: mniedermaier1337/cybicss7comlatest
+    build:
+      context: ../../software/s7com
+      dockerfile: Dockerfile
+    restart: always
+    ports:
+      - 102:102
+    depends_on:
+    - openplc
+
   fuxa:
     image: mniedermaier1337/cybicsfuxa:latest
     build:

software/build.sh

@@ -11,5 +11,6 @@ docker buildx inspect --bootstrap
 docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-hwio-raspberry:latest --push ./hwio-raspberry
 docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-openplc:latest --push ./OpenPLC
 docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-opcua:latest --push ./opcua
+docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-s7com:latest --push ./s7com
 docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-fuxa:latest --push ./FUXA
 docker buildx build --platform linux/arm64 -t 172.17.0.1:5000/cybics-stm32:latest --push ./stm32

software/docker-compose.yaml

@@ -21,6 +21,16 @@ services:
     networks:
       - br-cybics
 
+  s7com:
+    image: localhost:5000/cybics-s7com:latest
+    depends_on:
+    - openplc
+    restart: always
+    ports:
+      - 102:102
+    networks:
+      - br-cybics
+
   openplc:
     image: localhost:5000/cybics-openplc:latest
     restart: always

software/s7com/Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3-slim
+
+RUN apt-get update && apt-get install -y \
+    network-manager \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /CybICS
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+COPY s7com.py ./
+
+CMD [ "python", "./s7com.py" ]

software/s7com/requirements.txt

@@ -0,0 +1 @@
+python-snap7

software/s7com/s7com.py

@@ -0,0 +1,42 @@
+import snap7
+import socket
+import time
+import ctypes
+import logging
+
+# Configure logging
+format="%(asctime)s - %(levelname)s - %(filename)s:%(lineno)d - %(message)s"
+logging.basicConfig(format=format, level=logging.INFO,
+                        datefmt="%H:%M:%S")
+
+# Initialize Snap7 Server
+server = snap7.server.Server()
+
+def start_s7_fake_server():
+    """
+    Start a fake Siemens S7 PLC server that listens on TCP port 102.
+    This allows detection by nmap with --script s7-info.
+    """
+    try:
+        size = 100
+        db_data: CDataArrayType = (snap7.WordLen.Byte.ctype * size)()
+
+        # Register fake data block
+        server.register_area(snap7.SrvArea.DB, 1, db_data)
+
+        # Start server listening on all interfaces (port 102)
+        server.start_to("0.0.0.0")
+        logging.info("Fake Siemens S7 PLC started on port 102...")
+
+        while True:
+            time.sleep(1)  # Keep the server running
+
+    except KeyboardInterrupt:
+        logging.info("Stopping fake S7 server...")
+        server.stop()
+        server.destroy()
+    except Exception as e:
+        logging.error(f"Error: {e}", exc_info=True)
+
+if __name__ == "__main__":
+    start_s7_fake_server()