mirror of
https://github.com/freedombox/FreedomBox.git
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913d71e9bc
Signed-off-by: Joseph Nuthalapati <njoseph@thoughtworks.com> Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>
150 lines
4.6 KiB
Python
150 lines
4.6 KiB
Python
#
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# This file is part of FreedomBox.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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FreedomBox app to configure a firewall.
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"""
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import logging
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from django.utils.translation import ugettext_lazy as _
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import plinth.service as service_module
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from plinth import actions, cfg
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from plinth.menu import main_menu
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from plinth.signals import service_enabled
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from plinth.utils import format_lazy
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version = 1
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is_essential = True
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managed_packages = ['firewalld']
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name = _('Firewall')
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description = [
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format_lazy(
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_('Firewall is a security system that controls the incoming and '
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'outgoing network traffic on your {box_name}. Keeping a '
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'firewall enabled and properly configured reduces risk of '
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'security threat from the Internet.'), box_name=cfg.box_name)
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]
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manual_page = 'Firewall'
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LOGGER = logging.getLogger(__name__)
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def init():
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"""Initailze firewall module"""
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menu = main_menu.get('system')
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menu.add_urlname(name, 'glyphicon-fire', 'firewall:index')
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service_enabled.connect(on_service_enabled)
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def setup(helper, old_version=None):
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"""Install and configure the module."""
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helper.install(managed_packages)
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_run(['setup'], superuser=True)
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def get_enabled_status():
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"""Return whether firewall is enabled"""
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output = _run(['get-status'], superuser=True)
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if not output:
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return False
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else:
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return output.split()[0] == 'running'
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def get_enabled_services(zone):
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"""Return the status of various services currently enabled"""
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output = _run(['get-enabled-services', '--zone', zone], superuser=True)
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return output.split()
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def get_interfaces(zone):
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"""Return the list of interfaces in a zone."""
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output = _run(['get-interfaces', '--zone', zone], superuser=True)
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return output.split()
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def add_service(port, zone):
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"""Enable a service in firewall"""
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_run(['add-service', port, '--zone', zone], superuser=True)
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def remove_service(port, zone):
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"""Remove a service in firewall"""
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_run(['remove-service', port, '--zone', zone], superuser=True)
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def on_service_enabled(sender, service_id, enabled, **kwargs):
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"""
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Enable/disable firewall ports when a service is
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enabled/disabled.
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"""
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del sender # Unused
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del kwargs # Unused
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internal_enabled_services = get_enabled_services(zone='internal')
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external_enabled_services = get_enabled_services(zone='external')
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LOGGER.info('Service enabled - %s, %s', service_id, enabled)
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service = service_module.services[service_id]
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for port in service.ports:
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if enabled:
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if port not in internal_enabled_services:
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add_service(port, zone='internal')
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if (service.is_external and port not in external_enabled_services):
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add_service(port, zone='external')
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else:
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# service already configured.
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pass
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else:
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if port in internal_enabled_services:
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enabled_services_on_port = [
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service_.is_enabled()
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for service_ in service_module.services.values()
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if port in service_.ports
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and service_id != service_.service_id
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]
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if not any(enabled_services_on_port):
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remove_service(port, zone='internal')
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if port in external_enabled_services:
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enabled_services_on_port = [
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service_.is_enabled()
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for service_ in service_module.services.values()
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if port in service_.ports and
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service_id != service_.service_id and service_.is_external
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]
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if not any(enabled_services_on_port):
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remove_service(port, zone='external')
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def _run(arguments, superuser=False):
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"""Run an given command and raise exception if there was an error"""
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command = 'firewall'
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if superuser:
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return actions.superuser_run(command, arguments)
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else:
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return actions.run(command, arguments)
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