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# -*- coding: utf-8 -*-
# manager.py
# Copyright (C) 2015 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Firewall Manager
"""
import commands
import subprocess
from leap.bitmask.vpn.constants import IS_MAC
class FirewallManager(object):
"""
Firewall manager that blocks/unblocks all the internet traffic with some
exceptions.
This allows us to achieve fail close on a vpn connection.
"""
# FIXME -- get the path
BITMASK_ROOT = "/usr/local/sbin/bitmask-root"
def __init__(self, remotes):
"""
Initialize the firewall manager with a set of remotes that we won't
block.
:param remotes: the gateway(s) that we will allow
:type remotes: list
"""
self._remotes = remotes
def start(self, restart=False):
"""
Launch the firewall using the privileged wrapper.
:returns: True if the exitcode of calling the root helper in a
subprocess is 0.
:rtype: bool
"""
gateways = [gateway for gateway, port in self._remotes]
# XXX check for wrapper existence, check it's root owned etc.
# XXX check that the iptables rules are in place.
cmd = ["pkexec", self.BITMASK_ROOT, "firewall", "start"]
if restart:
cmd.append("restart")
# FIXME -- use a processprotocol
exitCode = subprocess.call(cmd + gateways)
return True if exitCode is 0 else False
# def tear_down_firewall(self):
def stop(self):
"""
Tear the firewall down using the privileged wrapper.
"""
if IS_MAC:
# We don't support Mac so far
return True
exitCode = subprocess.call(["pkexec", self.BITMASK_ROOT,
"firewall", "stop"])
return True if exitCode is 0 else False
# def is_fw_down(self):
def is_up(self):
"""
Return whether the firewall is up or not.
:rtype: bool
"""
# TODO test this, refactored from is_fw_down
cmd = "pkexec {0} firewall isup".format(self.BITMASK_ROOT)
output = commands.getstatusoutput(cmd)[0]
return output != 256
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