126 lines
3.4 KiB
Python
126 lines
3.4 KiB
Python
#!/usr/bin/env python3
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"""
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Babycam Network State Machine
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Verwaltet die drei Betriebsmodi:
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A – Heimnetz (wlan0 verbunden, AP aus)
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B – Kein WLAN (AP auf wlan1 automatisch)
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C – Setup-Modus (AP läuft, User konfiguriert WLAN)
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Override-Datei: /tmp/babycam-ap-override
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"on" → AP immer an (manuell)
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"off" → AP immer aus (manuell)
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fehlt → Automatik
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"""
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import subprocess
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import time
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import logging
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import sys
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import os
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s [%(levelname)s] %(message)s",
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handlers=[logging.StreamHandler(sys.stdout)],
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)
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log = logging.getLogger(__name__)
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AP_INTERFACE = "wlan1"
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CLIENT_INTERFACE = "wlan0"
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AP_IP = "192.168.50.1"
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CHECK_INTERVAL = 30 # Sekunden
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OVERRIDE_FILE = "/var/lib/babycam/ap-override"
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def run(cmd, check=False):
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result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
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if check and result.returncode != 0:
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log.error(f"Fehler bei: {cmd}\n{result.stderr}")
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return result
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def get_override():
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"""Liest die manuelle Override-Einstellung. Gibt 'on', 'off' oder None zurück."""
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try:
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with open(OVERRIDE_FILE) as f:
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val = f.read().strip().lower()
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if val in ("on", "off"):
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return val
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except FileNotFoundError:
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pass
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return None
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def is_wlan0_connected():
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result = run(f"nmcli -t -f GENERAL.STATE device show {CLIENT_INTERFACE}")
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return "100 (connected)" in result.stdout
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def is_ap_running():
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result = run("systemctl is-active hostapd")
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return result.stdout.strip() == "active"
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def start_ap():
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log.info("Starte Access Point (BabyCam)...")
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run("ip addr add 192.168.50.1/24 dev wlan1 2>/dev/null || true")
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run("ip link set wlan1 up")
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run("systemctl start hostapd", check=True)
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run("systemctl start dnsmasq", check=True)
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log.info("Access Point gestartet.")
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def stop_ap():
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log.info("Stoppe Access Point...")
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run("systemctl stop hostapd")
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run("systemctl stop dnsmasq")
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run("ip addr flush dev wlan1 2>/dev/null || true")
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log.info("Access Point gestoppt.")
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def main():
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log.info("Babycam Network State Machine gestartet.")
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current_mode = None
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while True:
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override = get_override()
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connected = is_wlan0_connected()
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ap_running = is_ap_running()
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if override == "on":
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# Manuell: AP immer an
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if current_mode != "MANUAL_ON":
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log.info("Modus: Manuell – Access Point erzwungen AN.")
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if not ap_running:
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start_ap()
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current_mode = "MANUAL_ON"
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elif override == "off":
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# Manuell: AP immer aus
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if current_mode != "MANUAL_OFF":
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log.info("Modus: Manuell – Access Point erzwungen AUS.")
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if ap_running:
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stop_ap()
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current_mode = "MANUAL_OFF"
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else:
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# Automatik
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if connected:
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if current_mode != "A":
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log.info("Modus A: Heimnetz aktiv – AP aus.")
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if ap_running:
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stop_ap()
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current_mode = "A"
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else:
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if current_mode != "B":
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log.info("Modus B: Kein WLAN – starte Access Point.")
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if not ap_running:
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start_ap()
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current_mode = "B"
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time.sleep(CHECK_INTERVAL)
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if __name__ == "__main__":
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main()
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