Poll Firewalld State as JSON

get_firewalld_state.py

#!/usr/bin/env python3

import dbus
import json


FIREWALLD_BUS = "org.fedoraproject.FirewallD1"
FIREWALLD_RUNTIME_OBJ = "/org/fedoraproject/FirewallD1"
FIREWALLD_CONFIG_OBJ = "/org/fedoraproject/FirewallD1/config"

def main():
    system_bus = dbus.SystemBus()
    firewalld_runtime = system_bus.get_object(
        FIREWALLD_BUS,
        FIREWALLD_RUNTIME_OBJ
    )
    firewalld_config = system_bus.get_object(
        FIREWALLD_BUS,
        FIREWALLD_CONFIG_OBJ
    )

    default_zone = firewalld_runtime.getDefaultZone()
    zones = {str(zn): {} for zn in list(firewalld_config.getZoneNames())}
    for zone in zones.keys():
        zone_obj_path = firewalld_config.getZoneByName(zone)
        zone_obj = system_bus.get_object(
            FIREWALLD_BUS,
            zone_obj_path
        )
        zone_settings = zone_obj.getSettings2()
        zones[zone] = zone_settings

    print(
        json.dumps({
            "default_zone": default_zone,
            "zones": zones
        })
    )


if __name__ == "__main__":
    main()