pytun-pmd3

import os import sys import time from pytun import TunTapDevice, IFF_TUN, IFF_NO_PI # Note: Requires appropriate permissions (e.g., run as root/administrator # or user added to 'tun' group on Linux). On Windows, the wintun driver # might need manual installation first, though pytun-pmd3 attempts to manage it. try: # Use a unique name to avoid conflicts, or a fixed one for specific setup device_name = os.environ.get('PYTUN_DEV_NAME', 'pytun-pmd3-tun0') tun = TunTapDevice(name=device_name, flags=IFF_TUN | IFF_NO_PI) print(f"Created TUN device: {tun.name}") tun.up() print(f"Device {tun.name} is up.") # Configure IPv6 address (pytun-pmd3 is IPv6-ONLY) ipv6_address = os.environ.get('PYTUN_IPV6', 'fcd0::1/64') tun.ifconfig(ipv6=ipv6_address) print(f"Configured IPv6 address {ipv6_address} on {tun.name}") print(f"\nDevice {tun.name} configured. You can now try pinging its address.") print("Example: ping fcd0::1 (from another host/interface that can route to it)") print("Waiting for 10 seconds. Press Ctrl+C to stop.") start_time = time.time() while time.time() - start_time < 10: try: # Read up to 1500 bytes with a 1-second timeout packet = tun.read(1500, timeout=1) if packet: print(f"Received {len(packet)} bytes from TUN device.") sys.stdout.flush() except Exception as e: # Ignore common 'Resource temporarily unavailable' when no packets pass time.sleep(0.1) except PermissionError: print("Error: Permission denied. Try running as root/administrator or") print("ensure your user has appropriate permissions (e.g., added to 'tun' group).") print("On Linux: sudo usermod -a -G tun $(whoami) && sudo reboot") except FileNotFoundError as e: print(f"Error: File not found: {e}") print("On Windows, ensure the wintun driver is correctly installed and accessible.") except Exception as e: print(f"An unexpected error occurred: {e}") finally: if 'tun' in locals(): try: print(f"Closing TUN device: {tun.name}") tun.close() print("Device closed.") except Exception as e: print(f"Error closing TUN device: {e}")