/mandos/trunk : revision 505.1.2

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#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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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 General Public License as published by

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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self.value = value

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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"""Derived from the Avahi example code"""

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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('Mandos (%s) [%%(process)d]:'

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' %%(levelname)s: %%(message)s'

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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logger.critical("DBusException: %s", error)

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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"""Derived from the Avahi example code"""

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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"""Derived from the Avahi example code"""

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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"""Derived from the Avahi example code"""

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logger.debug("Avahi entry group state change: %i", state)

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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logger.critical("Avahi: Error in group state changed %s",

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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"""Derived from the Avahi example code"""

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if self.group is not None:

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try:

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self.group.Free()

375

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

227

dbus.exceptions.DBusException) as e:

377

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pass

378

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self.group = None

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self.remove()

380

381

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def server_state_changed(self, state, error=None):

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"""Derived from the Avahi example code"""

383

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logger.debug("Avahi server state change: %i", state)

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

234

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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241

if state in bad_states:

391

242

if bad_states[state] is not None:

392

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if error is None:

395

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logger.error(bad_states[state] + ": %r", error)

396

247

self.cleanup()

397

248

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

== "org.freedesktop.Avahi.CollisionError"):

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

logger.critical("D-Bus Exception", exc_info=error)

408

self.cleanup()

409

os._exit(1)

249

self.add()

410

250

else:

411

251

if error is None:

412

252

logger.debug("Unknown state: %r", state)

413

253

else:

414

254

logger.debug("Unknown state: %r: %r", state, error)

415

416

255

def activate(self):

417

256

"""Derived from the Avahi example code"""

418

257

if self.server is None:

422

261

follow_name_owner_changes=True),

423

262

avahi.DBUS_INTERFACE_SERVER)

424

263

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

264

self.server_state_changed)

426

265

self.server_state_changed(self.server.GetState())

427

266

428

267

429

class AvahiServiceToSyslog(AvahiService):

430

def rename(self, *args, **kwargs):

431

"""Add the new name to the syslog messages"""

432

ret = AvahiService.rename(self, *args, **kwargs)

433

syslogger.setFormatter(logging.Formatter(

434

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

"""This function is meant to be called by multiprocessing.Process

441

442

This function runs func(*args, **kwargs), and writes the resulting

443

return value on the provided multiprocessing.Connection.

444

"""

445

connection.send(func(*args, **kwargs))

446

connection.close()

447

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

return ((td.days * 24 * 60 * 60 * 1000)

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

448

274

class Client(object):

449

275

"""A representation of a client host served by this server.

450

276

451

277

Attributes:

452

approved: bool(); 'None' if not yet approved/disapproved

278

_approved: bool(); 'None' if not yet approved/disapproved

453

279

approval_delay: datetime.timedelta(); Time to wait for approval

454

280

approval_duration: datetime.timedelta(); Duration of one approval

455

281

checker: subprocess.Popen(); a running checker process used

462

288

instance %(name)s can be used in the command.

463

289

checker_initiator_tag: a gobject event source tag, or None

464

290

created: datetime.datetime(); (UTC) object creation

465

client_structure: Object describing what attributes a client has

466

and is used for storing the client at exit

467

291

current_checker_command: string; current running checker_command

292

disable_hook: If set, called by disable() as disable_hook(self)

468

293

disable_initiator_tag: a gobject event source tag, or None

469

294

enabled: bool()

470

295

fingerprint: string (40 or 32 hexadecimal digits); used to

473

298

interval: datetime.timedelta(); How often to start a new checker

474

299

last_approval_request: datetime.datetime(); (UTC) or None

475

300

last_checked_ok: datetime.datetime(); (UTC) or None

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

last_enabled: datetime.datetime(); (UTC) or None

301

last_enabled: datetime.datetime(); (UTC)

482

302

name: string; from the config file, used in log messages and

483

303

D-Bus identifiers

484

304

secret: bytestring; sent verbatim (over TLS) to client

485

305

timeout: datetime.timedelta(); How long from last_checked_ok

486

306

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

488

308

runtime_expansions: Allowed attributes for runtime expansion.

489

309

expires: datetime.datetime(); time (UTC) when a client will be

490

310

disabled, or None

491

server_settings: The server_settings dict from main()

492

311

"""

493

312

494

313

runtime_expansions = ("approval_delay", "approval_duration",

495

"created", "enabled", "expires",

496

"fingerprint", "host", "interval",

497

"last_approval_request", "last_checked_ok",

314

"created", "enabled", "fingerprint",

315

"host", "interval", "last_checked_ok",

498

316

"last_enabled", "name", "timeout")

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

"checker": "fping -q -- %%(host)s",

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

511

@staticmethod

512

def config_parser(config):

513

"""Construct a new dict of client settings of this form:

514

{ client_name: {setting_name: value, ...}, ...}

515

with exceptions for any special settings as defined above.

516

NOTE: Must be a pure function. Must return the same result

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

client["host"] = section["host"]

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

client["enabled"] = config.getboolean(client_name,

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

client["fingerprint"] = (section["fingerprint"].upper()

535

.replace(" ", ""))

536

if "secret" in section:

537

client["secret"] = section["secret"].decode("base64")

538

elif "secfile" in section:

539

with open(os.path.expanduser(os.path.expandvars

540

(section["secfile"])),

541

"rb") as secfile:

542

client["secret"] = secfile.read()

543

else:

544

raise TypeError("No secret or secfile for section {}"

545

.format(section))

546

client["timeout"] = string_to_delta(section["timeout"])

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

client["interval"] = string_to_delta(section["interval"])

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

client["checker_command"] = section["checker"]

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

def __init__(self, settings, name = None, server_settings=None):

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

def __init__(self, name = None, disable_hook=None, config=None):

334

"""Note: the 'checker' key in 'config' sets the

335

'checker_command' attribute and *not* the 'checker'

336

attribute."""

562

337

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

self.expires = (datetime.datetime.utcnow()

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

338

if config is None:

339

config = {}

580

340

logger.debug("Creating client %r", self.name)

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

self.fingerprint = (config["fingerprint"].upper()

345

.replace(" ", ""))

581

346

logger.debug(" Fingerprint: %s", self.fingerprint)

582

self.created = settings.get("created",

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

347

if "secret" in config:

348

self.secret = config["secret"].decode("base64")

349

elif "secfile" in config:

350

with open(os.path.expanduser(os.path.expandvars

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

raise TypeError("No secret or secfile for client %s"

356

% self.name)

357

self.host = config.get("host", "")

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

self.timeout = string_to_delta(config["timeout"])

364

self.extended_timeout = string_to_delta(config["extended_timeout"])

365

self.interval = string_to_delta(config["interval"])

366

self.disable_hook = disable_hook

586

367

self.checker = None

587

368

self.checker_initiator_tag = None

588

369

self.disable_initiator_tag = None

370

self.expires = None

589

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

590

373

self.current_checker_command = None

591

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

self.approved_by_default = config.get("approved_by_default",

377

True)

592

378

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

598

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

type(self), lambda obj: isinstance(obj, property)):

602

if not name.startswith("_"):

603

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

604

384

605

# Send notice to process children that client state has changed

606

385

def send_changedstate(self):

607

with self.changedstate:

608

self.changedstate.notify_all()

609

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

610

390

def enable(self):

611

391

"""Start this client's checker and timeout hooks"""

612

392

if getattr(self, "enabled", False):

613

393

# Already enabled

614

394

return

395

self.send_changedstate()

396

# Schedule a new checker to be started an 'interval' from now,

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

# Schedule a disable() when 'timeout' has passed

615

402

self.expires = datetime.datetime.utcnow() + self.timeout

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

616

406

self.enabled = True

617

407

self.last_enabled = datetime.datetime.utcnow()

618

self.init_checker()

619

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

620

410

621

411

def disable(self, quiet=True):

622

412

"""Disable this client."""

623

413

if not getattr(self, "enabled", False):

624

414

return False

625

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

626

418

logger.info("Disabling client %s", self.name)

627

if getattr(self, "disable_initiator_tag", None) is not None:

419

if getattr(self, "disable_initiator_tag", False):

628

420

gobject.source_remove(self.disable_initiator_tag)

629

421

self.disable_initiator_tag = None

630

422

self.expires = None

631

if getattr(self, "checker_initiator_tag", None) is not None:

423

if getattr(self, "checker_initiator_tag", False):

632

424

gobject.source_remove(self.checker_initiator_tag)

633

425

self.checker_initiator_tag = None

634

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

635

429

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

430

# Do not run this again if called by a gobject.timeout_add

639

431

return False

640

432

641

433

def __del__(self):

434

self.disable_hook = None

642

435

self.disable()

643

436

644

def init_checker(self):

645

# Schedule a new checker to be started an 'interval' from now,

646

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

int(self.interval.total_seconds() * 1000),

651

self.start_checker)

652

# Schedule a disable() when 'timeout' has passed

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

int(self.timeout.total_seconds() * 1000), self.disable)

657

# Also start a new checker *right now*.

658

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

437

def checker_callback(self, pid, condition, command):

662

438

"""The checker has completed, so take appropriate actions."""

663

439

self.checker_callback_tag = None

664

440

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

672

if self.last_checker_status == 0:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

673

444

logger.info("Checker for %(name)s succeeded",

674

445

vars(self))

675

446

self.checked_ok()

676

447

else:

677

logger.info("Checker for %(name)s failed", vars(self))

448

logger.info("Checker for %(name)s failed",

449

vars(self))

678

450

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

451

logger.warning("Checker for %(name)s crashed?",

682

452

vars(self))

683

return False

684

685

def checked_ok(self):

686

"""Assert that the client has been seen, alive and well."""

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

"""Bump up the timeout for this client."""

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

This should only be called when the client has been seen,

458

alive and well.

459

"""

694

460

if timeout is None:

695

461

timeout = self.timeout

696

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

if getattr(self, "enabled", False):

700

self.disable_initiator_tag = gobject.timeout_add(

701

int(timeout.total_seconds() * 1000), self.disable)

702

self.expires = datetime.datetime.utcnow() + timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

self.expires = datetime.datetime.utcnow() + timeout

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

703

468

704

469

def need_approval(self):

705

470

self.last_approval_request = datetime.datetime.utcnow()

710

475

If a checker already exists, leave it running and do

711

476

nothing."""

712

477

# The reason for not killing a running checker is that if we

713

# did that, and if a checker (for some reason) started running

714

# slowly and taking more than 'interval' time, then the client

715

# would inevitably timeout, since no checker would get a

716

# chance to run to completion. If we instead leave running

478

# did that, then if a checker (for some reason) started

479

# running slowly and taking more than 'interval' time, the

480

# client would inevitably timeout, since no checker would get

481

# a chance to run to completion. If we instead leave running

717

482

# checkers alone, the checker would have to take more time

718

483

# than 'timeout' for the client to be disabled, which is as it

719

484

# should be.

720

485

721

if self.checker is not None and not self.checker.is_alive():

722

logger.warning("Checker was not alive; joining")

723

self.checker.join()

724

self.checker = None

486

# If a checker exists, make sure it is not a zombie

487

try:

488

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

725

499

# Start a new checker if needed

726

500

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

attr: re.escape(str(getattr(self, attr)))

730

for attr in self.runtime_expansions }

731

501

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

logger.error('Could not format string "%s"',

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

re.escape(unicode(str(getattr(self, attr, "")),

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

logger.error('Could not format string "%s":'

518

' %s', self.checker_command, error)

519

return True # Try again later

738

520

self.current_checker_command = command

739

logger.info("Starting checker %r for %s", command,

740

self.name)

741

# We don't need to redirect stdout and stderr, since

742

# in normal mode, that is already done by daemon(),

743

# and in debug mode we don't want to. (Stdin is

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

args = (pipe[1], subprocess.call, command),

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

pipe[0].fileno(), gobject.IO_IN,

763

self.checker_callback, pipe[0], command)

521

try:

522

logger.info("Starting checker %r for %s",

523

command, self.name)

524

# We don't need to redirect stdout and stderr, since

525

# in normal mode, that is already done by daemon(),

526

# and in debug mode we don't want to. (Stdin is

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

logger.error("Failed to start subprocess: %s",

543

error)

764

544

# Re-run this periodically if run by gobject.timeout_add

765

545

return True

766

546

772

552

if getattr(self, "checker", None) is None:

773

553

return

774

554

logger.debug("Stopping checker for %(name)s", vars(self))

775

self.checker.terminate()

555

try:

556

os.kill(self.checker.pid, signal.SIGTERM)

557

#time.sleep(0.5)

558

#if self.checker.poll() is None:

559

# os.kill(self.checker.pid, signal.SIGKILL)

560

except OSError as error:

561

if error.errno != errno.ESRCH: # No such process

562

raise

776

563

self.checker = None

777

564

778

565

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

783

568

"""Decorators for marking methods of a DBusObjectWithProperties to

784

569

become properties on the D-Bus.

785

570

794

579

# "Set" method, so we fail early here:

795

580

if byte_arrays and signature != "ay":

796

581

raise ValueError("Byte arrays not supported for non-'ay'"

797

" signature {!r}".format(signature))

798

582

" signature %r" % signature)

799

583

def decorator(func):

800

584

func._dbus_is_property = True

801

585

func._dbus_interface = dbus_interface

806

590

func._dbus_name = func._dbus_name[:-14]

807

591

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

592

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

def _foo(self): # Function name does not matter

820

return {"org.freedesktop.DBus.Deprecated": "true",

821

"org.freedesktop.DBus.Property.EmitsChangedSignal":

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

"""Decorator to annotate D-Bus methods, signals or properties

836

Usage:

837

838

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

@dbus_service_property("org.example.Interface", signature="b",

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

593

return decorator

852

594

853

595

854

596

class DBusPropertyException(dbus.exceptions.DBusException):

855

597

"""A base class for D-Bus property-related exceptions

856

598

"""

857

pass

599

def __unicode__(self):

600

return unicode(str(self))

858

601

859

602

860

603

class DBusPropertyAccessException(DBusPropertyException):

878

621

"""

879

622

880

623

@staticmethod

881

def _is_dbus_thing(thing):

882

"""Returns a function testing if an attribute is a D-Bus thing

883

884

If called like _is_dbus_thing("method") it returns a function

885

suitable for use as predicate to inspect.getmembers().

886

"""

887

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

888

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

889

626

890

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

891

628

"""Returns a generator of (name, attribute) pairs

892

629

"""

893

return ((getattr(athing.__get__(self), "_dbus_name", name),

894

athing.__get__(self))

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

895

631

for cls in self.__class__.__mro__

896

for name, athing in

897

inspect.getmembers(cls, self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

898

633

899

634

def _get_dbus_property(self, interface_name, property_name):

900

635

"""Returns a bound method if one exists which is a D-Bus

901

636

property with the specified name and interface.

902

637

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

cls, self._is_dbus_thing("property")):

906

if (value._dbus_name == property_name

907

and value._dbus_interface == interface_name):

638

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

908

641

return value.__get__(self)

909

642

910

643

# No such property

911

raise DBusPropertyNotFound("{}:{}.{}".format(

912

self.dbus_object_path, interface_name, property_name))

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

913

647

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

648

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

916

649

out_signature="v")

917

650

def Get(self, interface_name, property_name):

918

651

"""Standard D-Bus property Get() method, see D-Bus standard.

936

669

# The byte_arrays option is not supported yet on

937

670

# signatures other than "ay".

938

671

if prop._dbus_signature != "ay":

939

raise ValueError("Byte arrays not supported for non-"

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

value = dbus.ByteArray(b''.join(chr(byte)

943

for byte in value))

672

raise ValueError

673

value = dbus.ByteArray(''.join(unichr(byte)

674

for byte in value))

944

675

prop(value)

945

676

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

677

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

948

678

out_signature="a{sv}")

949

679

def GetAll(self, interface_name):

950

680

"""Standard D-Bus property GetAll() method, see D-Bus

952

682

953

683

Note: Will not include properties with access="write".

954

684

"""

955

properties = {}

956

for name, prop in self._get_all_dbus_things("property"):

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

957

687

if (interface_name

958

688

and interface_name != prop._dbus_interface):

959

689

# Interface non-empty but did not match

963

693

continue

964

694

value = prop()

965

695

if not hasattr(value, "variant_level"):

966

properties[name] = value

696

all[name] = value

967

697

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

970

return dbus.Dictionary(properties, signature="sv")

971

972

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

976

standard.

977

"""

978

pass

698

all[name] = type(value)(value, variant_level=

699

value.variant_level+1)

700

return dbus.Dictionary(all, signature="sv")

979

701

980

702

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

703

out_signature="s",

982

704

path_keyword='object_path',

983

705

connection_keyword='connection')

984

706

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

707

"""Standard D-Bus method, overloaded to insert property tags.

988

708

"""

989

709

xmlstring = dbus.service.Object.Introspect(self, object_path,

990

710

connection)

991

711

try:

992

712

document = xml.dom.minidom.parseString(xmlstring)

993

994

713

def make_tag(document, name, prop):

995

714

e = document.createElement("property")

996

715

e.setAttribute("name", name)

997

716

e.setAttribute("type", prop._dbus_signature)

998

717

e.setAttribute("access", prop._dbus_access)

999

718

return e

1000

1001

719

for if_tag in document.getElementsByTagName("interface"):

1002

# Add property tags

1003

720

for tag in (make_tag(document, name, prop)

1004

721

for name, prop

1005

in self._get_all_dbus_things("property")

722

in self._get_all_dbus_properties()

1006

723

if prop._dbus_interface

1007

724

== if_tag.getAttribute("name")):

1008

725

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

for typ in ("method", "signal", "property"):

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

if (name == tag.getAttribute("name")

1016

and prop._dbus_interface

1017

== if_tag.getAttribute("name")):

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

if name == if_tag.getAttribute("name")

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

726

# Add the names to the return values for the

1039

727

# "org.freedesktop.DBus.Properties" methods

1040

728

if (if_tag.getAttribute("name")

1055

743

except (AttributeError, xml.dom.DOMException,

1056

744

xml.parsers.expat.ExpatError) as error:

1057

745

logger.error("Failed to override Introspection method",

1058

exc_info=error)

746

error)

1059

747

return xmlstring

1060

748

1061

749

1062

def datetime_to_dbus(dt, variant_level=0):

750

def datetime_to_dbus (dt, variant_level=0):

1063

751

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1064

752

if dt is None:

1065

753

return dbus.String("", variant_level = variant_level)

1066

return dbus.String(dt.isoformat(), variant_level=variant_level)

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

"""A class decorator; applied to a subclass of

1071

dbus.service.Object, it will add alternate D-Bus attributes with

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

@alternate_dbus_interfaces({"org.example.Interface":

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

@dbus.service.method("org.example.Interface")

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

reachable via two interfaces: "org.example.Interface" and

1084

"net.example.AlternateInterface", the latter of which will have

1085

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1086

"true", unless "deprecate" is passed with a False value.

1087

1088

This works for methods and signals, and also for D-Bus properties

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

754

return dbus.String(dt.isoformat(),

755

variant_level=variant_level)

756

757

class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):

758

"""Applied to an empty subclass of a D-Bus object, this metaclass

759

will add additional D-Bus attributes matching a certain pattern.

1091

760

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

for attrname, attribute in inspect.getmembers(cls):

761

def __new__(mcs, name, bases, attr):

762

# Go through all the base classes which could have D-Bus

763

# methods, signals, or properties in them

764

for base in (b for b in bases

765

if issubclass(b, dbus.service.Object)):

766

# Go though all attributes of the base class

767

for attrname, attribute in inspect.getmembers(base):

1100

768

# Ignore non-D-Bus attributes, and D-Bus attributes

1101

769

# with the wrong interface name

1102

770

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

771

or not attribute._dbus_interface

772

.startswith("se.recompile.Mandos")):

1105

773

continue

1106

774

# Create an alternate D-Bus interface name based on

1107

775

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

776

alt_interface = (attribute._dbus_interface

777

.replace("se.recompile.Mandos",

778

"se.bsnet.fukt.Mandos"))

1111

779

# Is this a D-Bus signal?

1112

780

if getattr(attribute, "_dbus_is_signal", False):

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

781

# Extract the original non-method function by

782

# black magic

783

nonmethod_func = (dict(

1117

784

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

785

attribute.__closure__))["func"]

786

.cell_contents)

1122

787

# Create a new, but exactly alike, function

1123

788

# object, and decorate it to be a new D-Bus signal

1124

789

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

790

new_function = (dbus.service.signal

791

(alt_interface,

792

attribute._dbus_signature)

793

(types.FunctionType(

794

nonmethod_func.func_code,

795

nonmethod_func.func_globals,

796

nonmethod_func.func_name,

797

nonmethod_func.func_defaults,

798

nonmethod_func.func_closure)))

1148

799

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

800

# old and new functions, so both the old and new

801

# signals gets sent when the function is called

1152

802

def fixscope(func1, func2):

1153

803

"""This function is a scope container to pass

1154

804

func1 and func2 to the "call_both" function

1155

805

outside of its arguments"""

1156

1157

806

def call_both(*args, **kwargs):

1158

807

"""This function will emit two D-Bus

1159

808

signals by calling func1 and func2"""

1160

809

func1(*args, **kwargs)

1161

810

func2(*args, **kwargs)

1162

1163

811

return call_both

1164

812

# Create the "call_both" function and add it to

1165

813

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

814

attr[attrname] = fixscope(attribute,

815

new_function)

1167

816

# Is this a D-Bus method?

1168

817

elif getattr(attribute, "_dbus_is_method", False):

1169

818

# Create a new, but exactly alike, function

1170

819

# object. Decorate it to be a new D-Bus method

1171

820

# with the alternate D-Bus interface name. Add it

1172

821

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

822

attr[attrname] = (dbus.service.method

823

(alt_interface,

824

attribute._dbus_in_signature,

825

attribute._dbus_out_signature)

826

(types.FunctionType

827

(attribute.func_code,

828

attribute.func_globals,

829

attribute.func_name,

830

attribute.func_defaults,

831

attribute.func_closure)))

1189

832

# Is this a D-Bus property?

1190

833

elif getattr(attribute, "_dbus_is_property", False):

1191

834

# Create a new, but exactly alike, function

1192

835

# object, and decorate it to be a new D-Bus

1193

836

# property with the alternate D-Bus interface

1194

837

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

elif getattr(attribute, "_dbus_is_interface", False):

1214

# Create a new, but exactly alike, function

1215

# object. Decorate it to be a new D-Bus interface

1216

# with the alternate D-Bus interface name. Add it

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

return { "org.freedesktop.DBus.Deprecated":

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

cls = type(b"{}Alternate".format(cls.__name__),

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

@alternate_dbus_interfaces({"se.recompile.Mandos":

1251

"se.bsnet.fukt.Mandos"})

838

attr[attrname] = (dbus_service_property

839

(alt_interface,

840

attribute._dbus_signature,

841

attribute._dbus_access,

842

attribute

843

._dbus_get_args_options

844

["byte_arrays"])

845

(types.FunctionType

846

(attribute.func_code,

847

attribute.func_globals,

848

attribute.func_name,

849

attribute.func_defaults,

850

attribute.func_closure)))

851

return type.__new__(mcs, name, bases, attr)

852

1252

853

class ClientDBus(Client, DBusObjectWithProperties):

1253

854

"""A Client class using D-Bus

1254

855

1258

859

"""

1259

860

1260

861

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

862

+ ("dbus_object_path",))

1264

863

1265

864

# dbus.service.Object doesn't use super(), so we can't either.

1266

865

1267

866

def __init__(self, bus = None, *args, **kwargs):

867

self._approvals_pending = 0

1268

868

self.bus = bus

1269

869

Client.__init__(self, *args, **kwargs)

1270

870

# Only now, when this client is initialized, can it show up on

1271

871

# the D-Bus

1272

client_object_name = str(self.name).translate(

872

client_object_name = unicode(self.name).translate(

1273

873

{ord("."): ord("_"),

1274

874

ord("-"): ord("_")})

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

875

self.dbus_object_path = (dbus.ObjectPath

876

("/clients/" + client_object_name))

1277

877

DBusObjectWithProperties.__init__(self, self.bus,

1278

878

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

879

880

def notifychangeproperty(transform_func,

881

dbus_name, type_func=lambda x: x,

882

variant_level=1):

1285

883

""" Modify a variable so that it's a property which announces

1286

884

its changes to DBus.

1287

1288

transform_fun: Function that takes a value and a variant_level

1289

and transforms it to a D-Bus type.

885

886

transform_fun: Function that takes a value and transforms it

887

to a D-Bus type.

1290

888

dbus_name: D-Bus name of the variable

1291

889

type_func: Function that transform the value before sending it

1292

890

to the D-Bus. Default: no transform

1293

891

variant_level: D-Bus variant level. Default: 1

1294

892

"""

1295

attrname = "_{}".format(dbus_name)

1296

893

real_value = [None,]

1297

894

def setter(self, value):

895

old_value = real_value[0]

896

real_value[0] = value

1298

897

if hasattr(self, "dbus_object_path"):

1299

if (not hasattr(self, attrname) or

1300

type_func(getattr(self, attrname, None))

1301

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

dbus.Dictionary({ dbus.String(dbus_name):

1315

dbus_value }),

1316

dbus.Array())

1317

setattr(self, attrname, value)

898

if type_func(old_value) != type_func(real_value[0]):

899

dbus_value = transform_func(type_func(real_value[0]),

900

variant_level)

901

self.PropertyChanged(dbus.String(dbus_name),

902

dbus_value)

1318

903

1319

return property(lambda self: getattr(self, attrname), setter)

904

return property(lambda self: real_value[0], setter)

905

1320

906

1321

907

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

908

approvals_pending = notifychangeproperty(dbus.Boolean,

1325

911

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1326

912

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

913

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

914

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

915

type_func = lambda checker: checker is not None)

1331

916

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

917

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

last_approval_request = notifychangeproperty(

1336

datetime_to_dbus, "LastApprovalRequest")

918

last_approval_request = notifychangeproperty(datetime_to_dbus,

919

"LastApprovalRequest")

1337

920

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

921

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

type_func = lambda td: td.total_seconds() * 1000)

1342

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

type_func = lambda td: td.total_seconds() * 1000)

922

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

923

type_func = _timedelta_to_milliseconds)

924

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

925

type_func = _timedelta_to_milliseconds)

1345

926

host = notifychangeproperty(dbus.String, "Host")

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

type_func = lambda td: td.total_seconds() * 1000)

1349

extended_timeout = notifychangeproperty(

1350

dbus.UInt64, "ExtendedTimeout",

1351

type_func = lambda td: td.total_seconds() * 1000)

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

type_func = lambda td: td.total_seconds() * 1000)

927

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

928

type_func = _timedelta_to_milliseconds)

929

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

930

type_func = _timedelta_to_milliseconds)

931

interval = notifychangeproperty(dbus.UInt16, "Interval",

932

type_func = _timedelta_to_milliseconds)

1355

933

checker_command = notifychangeproperty(dbus.String, "Checker")

1356

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1357

invalidate_only=True)

1358

934

1359

935

del notifychangeproperty

1360

936

1367

943

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1368

944

Client.__del__(self, *args, **kwargs)

1369

945

1370

def checker_callback(self, source, condition,

1371

connection, command, *args, **kwargs):

1372

ret = Client.checker_callback(self, source, condition,

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

946

def checker_callback(self, pid, condition, command,

947

*args, **kwargs):

948

self.checker_callback_tag = None

949

self.checker = None

950

if os.WIFEXITED(condition):

951

exitstatus = os.WEXITSTATUS(condition)

1377

952

# Emit D-Bus signal

1378

953

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

954

dbus.Int64(condition),

1380

955

dbus.String(command))

1381

956

else:

1382

957

# Emit D-Bus signal

1383

958

self.CheckerCompleted(dbus.Int16(-1),

1384

dbus.Int64(

1385

self.last_checker_signal),

959

dbus.Int64(condition),

1386

960

dbus.String(command))

1387

return ret

961

962

return Client.checker_callback(self, pid, condition, command,

963

*args, **kwargs)

1388

964

1389

965

def start_checker(self, *args, **kwargs):

1390

old_checker_pid = getattr(self.checker, "pid", None)

966

old_checker = self.checker

967

if self.checker is not None:

968

old_checker_pid = self.checker.pid

969

else:

970

old_checker_pid = None

1391

971

r = Client.start_checker(self, *args, **kwargs)

1392

972

# Only if new checker process was started

1393

973

if (self.checker is not None

1397

977

return r

1398

978

1399

979

def _reset_approved(self):

1400

self.approved = None

980

self._approved = None

1401

981

return False

1402

982

1403

983

def approve(self, value=True):

1404

self.approved = value

1405

gobject.timeout_add(int(self.approval_duration.total_seconds()

1406

* 1000), self._reset_approved)

1407

984

self.send_changedstate()

985

self._approved = value

986

gobject.timeout_add(_timedelta_to_milliseconds

987

(self.approval_duration),

988

self._reset_approved)

989

1408

990

1409

991

## D-Bus methods, signals & properties

1410

1411

## Interfaces

992

_interface = "se.recompile.Mandos.Client"

1412

993

1413

994

## Signals

1414

995

1425

1006

pass

1426

1007

1427

1008

# PropertyChanged - signal

1428

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1429

1009

@dbus.service.signal(_interface, signature="sv")

1430

1010

def PropertyChanged(self, property, value):

1431

1011

"D-Bus signal"

1465

1045

self.checked_ok()

1466

1046

1467

1047

# Enable - method

1468

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1469

1048

@dbus.service.method(_interface)

1470

1049

def Enable(self):

1471

1050

"D-Bus method"

1472

1051

self.enable()

1473

1052

1474

1053

# StartChecker - method

1475

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1476

1054

@dbus.service.method(_interface)

1477

1055

def StartChecker(self):

1478

1056

"D-Bus method"

1479

1057

self.start_checker()

1480

1058

1481

1059

# Disable - method

1482

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1483

1060

@dbus.service.method(_interface)

1484

1061

def Disable(self):

1485

1062

"D-Bus method"

1486

1063

self.disable()

1487

1064

1488

1065

# StopChecker - method

1489

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1490

1066

@dbus.service.method(_interface)

1491

1067

def StopChecker(self):

1492

1068

self.stop_checker()

1499

1075

return dbus.Boolean(bool(self.approvals_pending))

1500

1076

1501

1077

# ApprovedByDefault - property

1502

@dbus_service_property(_interface,

1503

signature="b",

1078

@dbus_service_property(_interface, signature="b",

1504

1079

access="readwrite")

1505

1080

def ApprovedByDefault_dbus_property(self, value=None):

1506

1081

if value is None: # get

1508

1083

self.approved_by_default = bool(value)

1509

1084

1510

1085

# ApprovalDelay - property

1511

@dbus_service_property(_interface,

1512

signature="t",

1086

@dbus_service_property(_interface, signature="t",

1513

1087

access="readwrite")

1514

1088

def ApprovalDelay_dbus_property(self, value=None):

1515

1089

if value is None: # get

1516

return dbus.UInt64(self.approval_delay.total_seconds()

1517

* 1000)

1090

return dbus.UInt64(self.approval_delay_milliseconds())

1518

1091

self.approval_delay = datetime.timedelta(0, 0, 0, value)

1519

1092

1520

1093

# ApprovalDuration - property

1521

@dbus_service_property(_interface,

1522

signature="t",

1094

@dbus_service_property(_interface, signature="t",

1523

1095

access="readwrite")

1524

1096

def ApprovalDuration_dbus_property(self, value=None):

1525

1097

if value is None: # get

1526

return dbus.UInt64(self.approval_duration.total_seconds()

1527

* 1000)

1098

return dbus.UInt64(_timedelta_to_milliseconds(

1099

self.approval_duration))

1528

1100

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1529

1101

1530

1102

# Name - property

1531

@dbus_annotations(

1532

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1533

1103

@dbus_service_property(_interface, signature="s", access="read")

1534

1104

def Name_dbus_property(self):

1535

1105

return dbus.String(self.name)

1536

1106

1537

1107

# Fingerprint - property

1538

@dbus_annotations(

1539

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1540

1108

@dbus_service_property(_interface, signature="s", access="read")

1541

1109

def Fingerprint_dbus_property(self):

1542

1110

return dbus.String(self.fingerprint)

1543

1111

1544

1112

# Host - property

1545

@dbus_service_property(_interface,

1546

signature="s",

1113

@dbus_service_property(_interface, signature="s",

1547

1114

access="readwrite")

1548

1115

def Host_dbus_property(self, value=None):

1549

1116

if value is None: # get

1550

1117

return dbus.String(self.host)

1551

self.host = str(value)

1118

self.host = value

1552

1119

1553

1120

# Created - property

1554

@dbus_annotations(

1555

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1556

1121

@dbus_service_property(_interface, signature="s", access="read")

1557

1122

def Created_dbus_property(self):

1558

return datetime_to_dbus(self.created)

1123

return dbus.String(datetime_to_dbus(self.created))

1559

1124

1560

1125

# LastEnabled - property

1561

1126

@dbus_service_property(_interface, signature="s", access="read")

1563

1128

return datetime_to_dbus(self.last_enabled)

1564

1129

1565

1130

# Enabled - property

1566

@dbus_service_property(_interface,

1567

signature="b",

1131

@dbus_service_property(_interface, signature="b",

1568

1132

access="readwrite")

1569

1133

def Enabled_dbus_property(self, value=None):

1570

1134

if value is None: # get

1575

1139

self.disable()

1576

1140

1577

1141

# LastCheckedOK - property

1578

@dbus_service_property(_interface,

1579

signature="s",

1142

@dbus_service_property(_interface, signature="s",

1580

1143

access="readwrite")

1581

1144

def LastCheckedOK_dbus_property(self, value=None):

1582

1145

if value is not None:

1584

1147

return

1585

1148

return datetime_to_dbus(self.last_checked_ok)

1586

1149

1587

# LastCheckerStatus - property

1588

@dbus_service_property(_interface, signature="n", access="read")

1589

def LastCheckerStatus_dbus_property(self):

1590

return dbus.Int16(self.last_checker_status)

1591

1592

1150

# Expires - property

1593

1151

@dbus_service_property(_interface, signature="s", access="read")

1594

1152

def Expires_dbus_property(self):

1600

1158

return datetime_to_dbus(self.last_approval_request)

1601

1159

1602

1160

# Timeout - property

1603

@dbus_service_property(_interface,

1604

signature="t",

1161

@dbus_service_property(_interface, signature="t",

1605

1162

access="readwrite")

1606

1163

def Timeout_dbus_property(self, value=None):

1607

1164

if value is None: # get

1608

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1609

old_timeout = self.timeout

1165

return dbus.UInt64(self.timeout_milliseconds())

1610

1166

self.timeout = datetime.timedelta(0, 0, 0, value)

1611

# Reschedule disabling

1612

if self.enabled:

1613

now = datetime.datetime.utcnow()

1614

self.expires += self.timeout - old_timeout

1615

if self.expires <= now:

1616

# The timeout has passed

1617

self.disable()

1618

else:

1619

if (getattr(self, "disable_initiator_tag", None)

1620

is None):

1621

return

1622

gobject.source_remove(self.disable_initiator_tag)

1623

self.disable_initiator_tag = gobject.timeout_add(

1624

int((self.expires - now).total_seconds() * 1000),

1625

self.disable)

1167

if getattr(self, "disable_initiator_tag", None) is None:

1168

return

1169

# Reschedule timeout

1170

gobject.source_remove(self.disable_initiator_tag)

1171

self.disable_initiator_tag = None

1172

self.expires = None

1173

time_to_die = (self.

1174

_timedelta_to_milliseconds((self

1175

.last_checked_ok

1176

+ self.timeout)

1177

- datetime.datetime

1178

.utcnow()))

1179

if time_to_die <= 0:

1180

# The timeout has passed

1181

self.disable()

1182

else:

1183

self.expires = (datetime.datetime.utcnow()

1184

+ datetime.timedelta(milliseconds = time_to_die))

1185

self.disable_initiator_tag = (gobject.timeout_add

1186

(time_to_die, self.disable))

1626

1187

1627

1188

# ExtendedTimeout - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1189

@dbus_service_property(_interface, signature="t",

1630

1190

access="readwrite")

1631

1191

def ExtendedTimeout_dbus_property(self, value=None):

1632

1192

if value is None: # get

1633

return dbus.UInt64(self.extended_timeout.total_seconds()

1634

* 1000)

1193

return dbus.UInt64(self.extended_timeout_milliseconds())

1635

1194

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

1636

1195

1637

1196

# Interval - property

1638

@dbus_service_property(_interface,

1639

signature="t",

1197

@dbus_service_property(_interface, signature="t",

1640

1198

access="readwrite")

1641

1199

def Interval_dbus_property(self, value=None):

1642

1200

if value is None: # get

1643

return dbus.UInt64(self.interval.total_seconds() * 1000)

1201

return dbus.UInt64(self.interval_milliseconds())

1644

1202

self.interval = datetime.timedelta(0, 0, 0, value)

1645

1203

if getattr(self, "checker_initiator_tag", None) is None:

1646

1204

return

1647

if self.enabled:

1648

# Reschedule checker run

1649

gobject.source_remove(self.checker_initiator_tag)

1650

self.checker_initiator_tag = gobject.timeout_add(

1651

value, self.start_checker)

1652

self.start_checker() # Start one now, too

1205

# Reschedule checker run

1206

gobject.source_remove(self.checker_initiator_tag)

1207

self.checker_initiator_tag = (gobject.timeout_add

1208

(value, self.start_checker))

1209

self.start_checker() # Start one now, too

1653

1210

1654

1211

# Checker - property

1655

@dbus_service_property(_interface,

1656

signature="s",

1212

@dbus_service_property(_interface, signature="s",

1657

1213

access="readwrite")

1658

1214

def Checker_dbus_property(self, value=None):

1659

1215

if value is None: # get

1660

1216

return dbus.String(self.checker_command)

1661

self.checker_command = str(value)

1217

self.checker_command = value

1662

1218

1663

1219

# CheckerRunning - property

1664

@dbus_service_property(_interface,

1665

signature="b",

1220

@dbus_service_property(_interface, signature="b",

1666

1221

access="readwrite")

1667

1222

def CheckerRunning_dbus_property(self, value=None):

1668

1223

if value is None: # get

1673

1228

self.stop_checker()

1674

1229

1675

1230

# ObjectPath - property

1676

@dbus_annotations(

1677

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

1678

"org.freedesktop.DBus.Deprecated": "true"})

1679

1231

@dbus_service_property(_interface, signature="o", access="read")

1680

1232

def ObjectPath_dbus_property(self):

1681

1233

return self.dbus_object_path # is already a dbus.ObjectPath

1682

1234

1683

1235

# Secret = property

1684

@dbus_annotations(

1685

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

1686

"invalidates"})

1687

@dbus_service_property(_interface,

1688

signature="ay",

1689

access="write",

1690

byte_arrays=True)

1236

@dbus_service_property(_interface, signature="ay",

1237

access="write", byte_arrays=True)

1691

1238

def Secret_dbus_property(self, value):

1692

self.secret = bytes(value)

1239

self.secret = str(value)

1693

1240

1694

1241

del _interface

1695

1242

1699

1246

self._pipe = child_pipe

1700

1247

self._pipe.send(('init', fpr, address))

1701

1248

if not self._pipe.recv():

1702

raise KeyError(fpr)

1249

raise KeyError()

1703

1250

1704

1251

def __getattribute__(self, name):

1705

if name == '_pipe':

1252

if(name == '_pipe'):

1706

1253

return super(ProxyClient, self).__getattribute__(name)

1707

1254

self._pipe.send(('getattr', name))

1708

1255

data = self._pipe.recv()

1709

1256

if data[0] == 'data':

1710

1257

return data[1]

1711

1258

if data[0] == 'function':

1712

1713

1259

def func(*args, **kwargs):

1714

1260

self._pipe.send(('funcall', name, args, kwargs))

1715

1261

return self._pipe.recv()[1]

1716

1717

1262

return func

1718

1263

1719

1264

def __setattr__(self, name, value):

1720

if name == '_pipe':

1265

if(name == '_pipe'):

1721

1266

return super(ProxyClient, self).__setattr__(name, value)

1722

1267

self._pipe.send(('setattr', name, value))

1723

1268

1269

class ClientDBusTransitional(ClientDBus):

1270

__metaclass__ = AlternateDBusNamesMetaclass

1724

1271

1725

1272

class ClientHandler(socketserver.BaseRequestHandler, object):

1726

1273

"""A class to handle client connections.

1731

1278

def handle(self):

1732

1279

with contextlib.closing(self.server.child_pipe) as child_pipe:

1733

1280

logger.info("TCP connection from: %s",

1734

str(self.client_address))

1281

unicode(self.client_address))

1735

1282

logger.debug("Pipe FD: %d",

1736

1283

self.server.child_pipe.fileno())

1737

1284

1738

session = gnutls.connection.ClientSession(

1739

self.request, gnutls.connection .X509Credentials())

1285

session = (gnutls.connection

1286

.ClientSession(self.request,

1287

gnutls.connection

1288

.X509Credentials()))

1740

1289

1741

1290

# Note: gnutls.connection.X509Credentials is really a

1742

1291

# generic GnuTLS certificate credentials object so long as

1751

1300

priority = self.server.gnutls_priority

1752

1301

if priority is None:

1753

1302

priority = "NORMAL"

1754

gnutls.library.functions.gnutls_priority_set_direct(

1755

session._c_object, priority, None)

1303

(gnutls.library.functions

1304

.gnutls_priority_set_direct(session._c_object,

1305

priority, None))

1756

1306

1757

1307

# Start communication using the Mandos protocol

1758

1308

# Get protocol number

1760

1310

logger.debug("Protocol version: %r", line)

1761

1311

try:

1762

1312

if int(line.strip().split()[0]) > 1:

1763

raise RuntimeError(line)

1313

raise RuntimeError

1764

1314

except (ValueError, IndexError, RuntimeError) as error:

1765

1315

logger.error("Unknown protocol version: %s", error)

1766

1316

return

1778

1328

approval_required = False

1779

1329

try:

1780

1330

try:

1781

fpr = self.fingerprint(

1782

self.peer_certificate(session))

1331

fpr = self.fingerprint(self.peer_certificate

1332

(session))

1783

1333

except (TypeError,

1784

1334

gnutls.errors.GNUTLSError) as error:

1785

1335

logger.warning("Bad certificate: %s", error)

1800

1350

while True:

1801

1351

if not client.enabled:

1802

1352

logger.info("Client %s is disabled",

1803

client.name)

1353

client.name)

1804

1354

if self.server.use_dbus:

1805

1355

# Emit D-Bus signal

1806

client.Rejected("Disabled")

1356

client.Rejected("Disabled")

1807

1357

return

1808

1358

1809

if client.approved or not client.approval_delay:

1359

if client._approved or not client.approval_delay:

1810

1360

#We are approved or approval is disabled

1811

1361

break

1812

elif client.approved is None:

1362

elif client._approved is None:

1813

1363

logger.info("Client %s needs approval",

1814

1364

client.name)

1815

1365

if self.server.use_dbus:

1816

1366

# Emit D-Bus signal

1817

1367

client.NeedApproval(

1818

client.approval_delay.total_seconds()

1819

* 1000, client.approved_by_default)

1368

client.approval_delay_milliseconds(),

1369

client.approved_by_default)

1820

1370

else:

1821

1371

logger.warning("Client %s was not approved",

1822

1372

client.name)

1826

1376

return

1827

1377

1828

1378

#wait until timeout or approved

1379

#x = float(client._timedelta_to_milliseconds(delay))

1829

1380

time = datetime.datetime.now()

1830

1381

client.changedstate.acquire()

1831

client.changedstate.wait(delay.total_seconds())

1382

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1832

1383

client.changedstate.release()

1833

1384

time2 = datetime.datetime.now()

1834

1385

if (time2 - time) >= delay:

1850

1401

try:

1851

1402

sent = session.send(client.secret[sent_size:])

1852

1403

except gnutls.errors.GNUTLSError as error:

1853

logger.warning("gnutls send failed",

1854

exc_info=error)

1404

logger.warning("gnutls send failed")

1855

1405

return

1856

logger.debug("Sent: %d, remaining: %d", sent,

1857

len(client.secret) - (sent_size

1858

+ sent))

1406

logger.debug("Sent: %d, remaining: %d",

1407

sent, len(client.secret)

1408

- (sent_size + sent))

1859

1409

sent_size += sent

1860

1410

1861

1411

logger.info("Sending secret to %s", client.name)

1862

# bump the timeout using extended_timeout

1863

client.bump_timeout(client.extended_timeout)

1412

# bump the timeout as if seen

1413

client.checked_ok(client.extended_timeout)

1864

1414

if self.server.use_dbus:

1865

1415

# Emit D-Bus signal

1866

1416

client.GotSecret()

1871

1421

try:

1872

1422

session.bye()

1873

1423

except gnutls.errors.GNUTLSError as error:

1874

logger.warning("GnuTLS bye failed",

1875

exc_info=error)

1424

logger.warning("GnuTLS bye failed")

1876

1425

1877

1426

@staticmethod

1878

1427

def peer_certificate(session):

1879

1428

"Return the peer's OpenPGP certificate as a bytestring"

1880

1429

# If not an OpenPGP certificate...

1881

if (gnutls.library.functions.gnutls_certificate_type_get(

1882

session._c_object)

1430

if (gnutls.library.functions

1431

.gnutls_certificate_type_get(session._c_object)

1883

1432

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1884

1433

# ...do the normal thing

1885

1434

return session.peer_certificate

1899

1448

def fingerprint(openpgp):

1900

1449

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1901

1450

# New GnuTLS "datum" with the OpenPGP public key

1902

datum = gnutls.library.types.gnutls_datum_t(

1903

ctypes.cast(ctypes.c_char_p(openpgp),

1904

ctypes.POINTER(ctypes.c_ubyte)),

1905

ctypes.c_uint(len(openpgp)))

1451

datum = (gnutls.library.types

1452

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1453

ctypes.POINTER

1454

(ctypes.c_ubyte)),

1455

ctypes.c_uint(len(openpgp))))

1906

1456

# New empty GnuTLS certificate

1907

1457

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1908

gnutls.library.functions.gnutls_openpgp_crt_init(

1909

ctypes.byref(crt))

1458

(gnutls.library.functions

1459

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1910

1460

# Import the OpenPGP public key into the certificate

1911

gnutls.library.functions.gnutls_openpgp_crt_import(

1912

crt, ctypes.byref(datum),

1913

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1461

(gnutls.library.functions

1462

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1463

gnutls.library.constants

1464

.GNUTLS_OPENPGP_FMT_RAW))

1914

1465

# Verify the self signature in the key

1915

1466

crtverify = ctypes.c_uint()

1916

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1917

crt, 0, ctypes.byref(crtverify))

1467

(gnutls.library.functions

1468

.gnutls_openpgp_crt_verify_self(crt, 0,

1469

ctypes.byref(crtverify)))

1918

1470

if crtverify.value != 0:

1919

1471

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1920

raise gnutls.errors.CertificateSecurityError(

1921

"Verify failed")

1472

raise (gnutls.errors.CertificateSecurityError

1473

("Verify failed"))

1922

1474

# New buffer for the fingerprint

1923

1475

buf = ctypes.create_string_buffer(20)

1924

1476

buf_len = ctypes.c_size_t()

1925

1477

# Get the fingerprint from the certificate into the buffer

1926

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1927

crt, ctypes.byref(buf), ctypes.byref(buf_len))

1478

(gnutls.library.functions

1479

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1480

ctypes.byref(buf_len)))

1928

1481

# Deinit the certificate

1929

1482

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1930

1483

# Convert the buffer to a Python bytestring

1931

1484

fpr = ctypes.string_at(buf, buf_len.value)

1932

1485

# Convert the bytestring to hexadecimal notation

1933

hex_fpr = binascii.hexlify(fpr).upper()

1486

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1934

1487

return hex_fpr

1935

1488

1936

1489

1937

1490

class MultiprocessingMixIn(object):

1938

1491

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

1939

1940

1492

def sub_process_main(self, request, address):

1941

1493

try:

1942

1494

self.finish_request(request, address)

1943

except Exception:

1495

except:

1944

1496

self.handle_error(request, address)

1945

1497

self.close_request(request)

1946

1498

1947

1499

def process_request(self, request, address):

1948

1500

"""Start a new process to process the request."""

1949

proc = multiprocessing.Process(target = self.sub_process_main,

1950

args = (request, address))

1951

proc.start()

1952

return proc

1501

multiprocessing.Process(target = self.sub_process_main,

1502

args = (request, address)).start()

1953

1503

1954

1504

1955

1505

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1956

1506

""" adds a pipe to the MixIn """

1957

1958

1507

def process_request(self, request, client_address):

1959

1508

"""Overrides and wraps the original process_request().

1960

1509

1962

1511

"""

1963

1512

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1964

1513

1965

proc = MultiprocessingMixIn.process_request(self, request,

1966

client_address)

1514

super(MultiprocessingMixInWithPipe,

1515

self).process_request(request, client_address)

1967

1516

self.child_pipe.close()

1968

self.add_pipe(parent_pipe, proc)

1517

self.add_pipe(parent_pipe)

1969

1518

1970

def add_pipe(self, parent_pipe, proc):

1519

def add_pipe(self, parent_pipe):

1971

1520

"""Dummy function; override as necessary"""

1972

raise NotImplementedError()

1521

raise NotImplementedError

1973

1522

1974

1523

1975

1524

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1981

1530

interface: None or a network interface name (string)

1982

1531

use_ipv6: Boolean; to use IPv6 or not

1983

1532

"""

1984

1985

1533

def __init__(self, server_address, RequestHandlerClass,

1986

interface=None,

1987

use_ipv6=True,

1988

socketfd=None):

1989

"""If socketfd is set, use that file descriptor instead of

1990

creating a new one with socket.socket().

1991

"""

1534

interface=None, use_ipv6=True):

1992

1535

self.interface = interface

1993

1536

if use_ipv6:

1994

1537

self.address_family = socket.AF_INET6

1995

if socketfd is not None:

1996

# Save the file descriptor

1997

self.socketfd = socketfd

1998

# Save the original socket.socket() function

1999

self.socket_socket = socket.socket

2000

# To implement --socket, we monkey patch socket.socket.

2001

#

2002

# (When socketserver.TCPServer is a new-style class, we

2003

# could make self.socket into a property instead of monkey

2004

# patching socket.socket.)

2005

#

2006

# Create a one-time-only replacement for socket.socket()

2007

@functools.wraps(socket.socket)

2008

def socket_wrapper(*args, **kwargs):

2009

# Restore original function so subsequent calls are

2010

# not affected.

2011

socket.socket = self.socket_socket

2012

del self.socket_socket

2013

# This time only, return a new socket object from the

2014

# saved file descriptor.

2015

return socket.fromfd(self.socketfd, *args, **kwargs)

2016

# Replace socket.socket() function with wrapper

2017

socket.socket = socket_wrapper

2018

# The socketserver.TCPServer.__init__ will call

2019

# socket.socket(), which might be our replacement,

2020

# socket_wrapper(), if socketfd was set.

2021

1538

socketserver.TCPServer.__init__(self, server_address,

2022

1539

RequestHandlerClass)

2023

2024

1540

def server_bind(self):

2025

1541

"""This overrides the normal server_bind() function

2026

1542

to bind to an interface if one was specified, and also NOT to

2032

1548

self.interface)

2033

1549

else:

2034

1550

try:

2035

self.socket.setsockopt(

2036

socket.SOL_SOCKET, SO_BINDTODEVICE,

2037

(self.interface + "\0").encode("utf-8"))

1551

self.socket.setsockopt(socket.SOL_SOCKET,

1552

SO_BINDTODEVICE,

1553

str(self.interface

1554

+ '\0'))

2038

1555

except socket.error as error:

2039

if error.errno == errno.EPERM:

2040

logger.error("No permission to bind to"

2041

" interface %s", self.interface)

2042

elif error.errno == errno.ENOPROTOOPT:

1556

if error[0] == errno.EPERM:

1557

logger.error("No permission to"

1558

" bind to interface %s",

1559

self.interface)

1560

elif error[0] == errno.ENOPROTOOPT:

2043

1561

logger.error("SO_BINDTODEVICE not available;"

2044

1562

" cannot bind to interface %s",

2045

1563

self.interface)

2046

elif error.errno == errno.ENODEV:

2047

logger.error("Interface %s does not exist,"

2048

" cannot bind", self.interface)

2049

1564

else:

2050

1565

raise

2051

1566

# Only bind(2) the socket if we really need to.

2054

1569

if self.address_family == socket.AF_INET6:

2055

1570

any_address = "::" # in6addr_any

2056

1571

else:

2057

any_address = "0.0.0.0" # INADDR_ANY

1572

any_address = socket.INADDR_ANY

2058

1573

self.server_address = (any_address,

2059

1574

self.server_address[1])

2060

1575

elif not self.server_address[1]:

2061

self.server_address = (self.server_address[0], 0)

1576

self.server_address = (self.server_address[0],

1577

0)

2062

1578

# if self.interface:

2063

1579

# self.server_address = (self.server_address[0],

2064

1580

# 0, # port

2078

1594

2079

1595

Assumes a gobject.MainLoop event loop.

2080

1596

"""

2081

2082

1597

def __init__(self, server_address, RequestHandlerClass,

2083

interface=None,

2084

use_ipv6=True,

2085

clients=None,

2086

gnutls_priority=None,

2087

use_dbus=True,

2088

socketfd=None):

1598

interface=None, use_ipv6=True, clients=None,

1599

gnutls_priority=None, use_dbus=True):

2089

1600

self.enabled = False

2090

1601

self.clients = clients

2091

1602

if self.clients is None:

2092

self.clients = {}

1603

self.clients = set()

2093

1604

self.use_dbus = use_dbus

2094

1605

self.gnutls_priority = gnutls_priority

2095

1606

IPv6_TCPServer.__init__(self, server_address,

2096

1607

RequestHandlerClass,

2097

1608

interface = interface,

2098

use_ipv6 = use_ipv6,

2099

socketfd = socketfd)

2100

1609

use_ipv6 = use_ipv6)

2101

1610

def server_activate(self):

2102

1611

if self.enabled:

2103

1612

return socketserver.TCPServer.server_activate(self)

2104

2105

1613

def enable(self):

2106

1614

self.enabled = True

2107

2108

def add_pipe(self, parent_pipe, proc):

1615

def add_pipe(self, parent_pipe):

2109

1616

# Call "handle_ipc" for both data and EOF events

2110

gobject.io_add_watch(

2111

parent_pipe.fileno(),

2112

gobject.IO_IN | gobject.IO_HUP,

2113

functools.partial(self.handle_ipc,

2114

parent_pipe = parent_pipe,

2115

proc = proc))

2116

2117

def handle_ipc(self, source, condition,

2118

parent_pipe=None,

2119

proc = None,

1617

gobject.io_add_watch(parent_pipe.fileno(),

1618

gobject.IO_IN | gobject.IO_HUP,

1619

functools.partial(self.handle_ipc,

1620

parent_pipe = parent_pipe))

1621

1622

def handle_ipc(self, source, condition, parent_pipe=None,

2120

1623

client_object=None):

2121

# error, or the other end of multiprocessing.Pipe has closed

2122

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2123

# Wait for other process to exit

2124

proc.join()

1624

condition_names = {

1625

gobject.IO_IN: "IN", # There is data to read.

1626

gobject.IO_OUT: "OUT", # Data can be written (without

1627

# blocking).

1628

gobject.IO_PRI: "PRI", # There is urgent data to read.

1629

gobject.IO_ERR: "ERR", # Error condition.

1630

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1631

# broken, usually for pipes and

1632

# sockets).

1633

}

1634

conditions_string = ' | '.join(name

1635

for cond, name in

1636

condition_names.iteritems()

1637

if cond & condition)

1638

# error or the other end of multiprocessing.Pipe has closed

1639

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

2125

1640

return False

2126

1641

2127

1642

# Read a request from the child

2132

1647

fpr = request[1]

2133

1648

address = request[2]

2134

1649

2135

for c in self.clients.itervalues():

1650

for c in self.clients:

2136

1651

if c.fingerprint == fpr:

2137

1652

client = c

2138

1653

break

2141

1656

"dress: %s", fpr, address)

2142

1657

if self.use_dbus:

2143

1658

# Emit D-Bus signal

2144

mandos_dbus_service.ClientNotFound(fpr,

2145

address[0])

1659

mandos_dbus_service.ClientNotFound(fpr, address[0])

2146

1660

parent_pipe.send(False)

2147

1661

return False

2148

1662

2149

gobject.io_add_watch(

2150

parent_pipe.fileno(),

2151

gobject.IO_IN | gobject.IO_HUP,

2152

functools.partial(self.handle_ipc,

2153

parent_pipe = parent_pipe,

2154

proc = proc,

2155

client_object = client))

1663

gobject.io_add_watch(parent_pipe.fileno(),

1664

gobject.IO_IN | gobject.IO_HUP,

1665

functools.partial(self.handle_ipc,

1666

parent_pipe = parent_pipe,

1667

client_object = client))

2156

1668

parent_pipe.send(True)

2157

# remove the old hook in favor of the new above hook on

2158

# same fileno

1669

# remove the old hook in favor of the new above hook on same fileno

2159

1670

return False

2160

1671

if command == 'funcall':

2161

1672

funcname = request[1]

2162

1673

args = request[2]

2163

1674

kwargs = request[3]

2164

1675

2165

parent_pipe.send(('data', getattr(client_object,

2166

funcname)(*args,

2167

**kwargs)))

1676

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2168

1677

2169

1678

if command == 'getattr':

2170

1679

attrname = request[1]

2171

if isinstance(client_object.__getattribute__(attrname),

2172

collections.Callable):

2173

parent_pipe.send(('function', ))

1680

if callable(client_object.__getattribute__(attrname)):

1681

parent_pipe.send(('function',))

2174

1682

else:

2175

parent_pipe.send((

2176

'data', client_object.__getattribute__(attrname)))

1683

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2177

1684

2178

1685

if command == 'setattr':

2179

1686

attrname = request[1]

2183

1690

return True

2184

1691

2185

1692

2186

def rfc3339_duration_to_delta(duration):

2187

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2188

2189

>>> rfc3339_duration_to_delta("P7D")

2190

datetime.timedelta(7)

2191

>>> rfc3339_duration_to_delta("PT60S")

2192

datetime.timedelta(0, 60)

2193

>>> rfc3339_duration_to_delta("PT60M")

2194

datetime.timedelta(0, 3600)

2195

>>> rfc3339_duration_to_delta("PT24H")

2196

datetime.timedelta(1)

2197

>>> rfc3339_duration_to_delta("P1W")

2198

datetime.timedelta(7)

2199

>>> rfc3339_duration_to_delta("PT5M30S")

2200

datetime.timedelta(0, 330)

2201

>>> rfc3339_duration_to_delta("P1DT3M20S")

2202

datetime.timedelta(1, 200)

2203

"""

2204

2205

# Parsing an RFC 3339 duration with regular expressions is not

2206

# possible - there would have to be multiple places for the same

2207

# values, like seconds. The current code, while more esoteric, is

2208

# cleaner without depending on a parsing library. If Python had a

2209

# built-in library for parsing we would use it, but we'd like to

2210

# avoid excessive use of external libraries.

2211

2212

# New type for defining tokens, syntax, and semantics all-in-one

2213

Token = collections.namedtuple("Token", (

2214

"regexp", # To match token; if "value" is not None, must have

2215

# a "group" containing digits

2216

"value", # datetime.timedelta or None

2217

"followers")) # Tokens valid after this token

2218

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2219

# the "duration" ABNF definition in RFC 3339, Appendix A.

2220

token_end = Token(re.compile(r"$"), None, frozenset())

2221

token_second = Token(re.compile(r"(\d+)S"),

2222

datetime.timedelta(seconds=1),

2223

frozenset((token_end, )))

2224

token_minute = Token(re.compile(r"(\d+)M"),

2225

datetime.timedelta(minutes=1),

2226

frozenset((token_second, token_end)))

2227

token_hour = Token(re.compile(r"(\d+)H"),

2228

datetime.timedelta(hours=1),

2229

frozenset((token_minute, token_end)))

2230

token_time = Token(re.compile(r"T"),

2231

None,

2232

frozenset((token_hour, token_minute,

2233

token_second)))

2234

token_day = Token(re.compile(r"(\d+)D"),

2235

datetime.timedelta(days=1),

2236

frozenset((token_time, token_end)))

2237

token_month = Token(re.compile(r"(\d+)M"),

2238

datetime.timedelta(weeks=4),

2239

frozenset((token_day, token_end)))

2240

token_year = Token(re.compile(r"(\d+)Y"),

2241

datetime.timedelta(weeks=52),

2242

frozenset((token_month, token_end)))

2243

token_week = Token(re.compile(r"(\d+)W"),

2244

datetime.timedelta(weeks=1),

2245

frozenset((token_end, )))

2246

token_duration = Token(re.compile(r"P"), None,

2247

frozenset((token_year, token_month,

2248

token_day, token_time,

2249

token_week)))

2250

# Define starting values

2251

value = datetime.timedelta() # Value so far

2252

found_token = None

2253

followers = frozenset((token_duration, )) # Following valid tokens

2254

s = duration # String left to parse

2255

# Loop until end token is found

2256

while found_token is not token_end:

2257

# Search for any currently valid tokens

2258

for token in followers:

2259

match = token.regexp.match(s)

2260

if match is not None:

2261

# Token found

2262

if token.value is not None:

2263

# Value found, parse digits

2264

factor = int(match.group(1), 10)

2265

# Add to value so far

2266

value += factor * token.value

2267

# Strip token from string

2268

s = token.regexp.sub("", s, 1)

2269

# Go to found token

2270

found_token = token

2271

# Set valid next tokens

2272

followers = found_token.followers

2273

break

2274

else:

2275

# No currently valid tokens were found

2276

raise ValueError("Invalid RFC 3339 duration: {!r}"

2277

.format(duration))

2278

# End token found

2279

return value

2280

2281

2282

1693

def string_to_delta(interval):

2283

1694

"""Parse a string and return a datetime.timedelta

2284

1695

2295

1706

>>> string_to_delta('5m 30s')

2296

1707

datetime.timedelta(0, 330)

2297

1708

"""

2298

2299

try:

2300

return rfc3339_duration_to_delta(interval)

2301

except ValueError:

2302

pass

2303

2304

1709

timevalue = datetime.timedelta(0)

2305

1710

for s in interval.split():

2306

1711

try:

2307

suffix = s[-1]

1712

suffix = unicode(s[-1])

2308

1713

value = int(s[:-1])

2309

1714

if suffix == "d":

2310

1715

delta = datetime.timedelta(value)

2317

1722

elif suffix == "w":

2318

1723

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2319

1724

else:

2320

raise ValueError("Unknown suffix {!r}".format(suffix))

2321

except IndexError as e:

1725

raise ValueError("Unknown suffix %r" % suffix)

1726

except (ValueError, IndexError) as e:

2322

1727

raise ValueError(*(e.args))

2323

1728

timevalue += delta

2324

1729

return timevalue

2325

1730

2326

1731

1732

def if_nametoindex(interface):

1733

"""Call the C function if_nametoindex(), or equivalent

1734

1735

Note: This function cannot accept a unicode string."""

1736

global if_nametoindex

1737

try:

1738

if_nametoindex = (ctypes.cdll.LoadLibrary

1739

(ctypes.util.find_library("c"))

1740

.if_nametoindex)

1741

except (OSError, AttributeError):

1742

logger.warning("Doing if_nametoindex the hard way")

1743

def if_nametoindex(interface):

1744

"Get an interface index the hard way, i.e. using fcntl()"

1745

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1746

with contextlib.closing(socket.socket()) as s:

1747

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1748

struct.pack(str("16s16x"),

1749

interface))

1750

interface_index = struct.unpack(str("I"),

1751

ifreq[16:20])[0]

1752

return interface_index

1753

return if_nametoindex(interface)

1754

1755

2327

1756

def daemon(nochdir = False, noclose = False):

2328

1757

"""See daemon(3). Standard BSD Unix function.

2329

1758

2337

1766

sys.exit()

2338

1767

if not noclose:

2339

1768

# Close all standard open file descriptors

2340

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1769

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2341

1770

if not stat.S_ISCHR(os.fstat(null).st_mode):

2342

1771

raise OSError(errno.ENODEV,

2343

"{} not a character device"

2344

.format(os.devnull))

1772

"%s not a character device"

1773

% os.path.devnull)

2345

1774

os.dup2(null, sys.stdin.fileno())

2346

1775

os.dup2(null, sys.stdout.fileno())

2347

1776

os.dup2(null, sys.stderr.fileno())

2356

1785

2357

1786

parser = argparse.ArgumentParser()

2358

1787

parser.add_argument("-v", "--version", action="version",

2359

version = "%(prog)s {}".format(version),

1788

version = "%%(prog)s %s" % version,

2360

1789

help="show version number and exit")

2361

1790

parser.add_argument("-i", "--interface", metavar="IF",

2362

1791

help="Bind to interface IF")

2368

1797

help="Run self-test")

2369

1798

parser.add_argument("--debug", action="store_true",

2370

1799

help="Debug mode; run in foreground and log"

2371

" to terminal", default=None)

1800

" to terminal")

2372

1801

parser.add_argument("--debuglevel", metavar="LEVEL",

2373

1802

help="Debug level for stdout output")

2374

1803

parser.add_argument("--priority", help="GnuTLS"

2381

1810

" files")

2382

1811

parser.add_argument("--no-dbus", action="store_false",

2383

1812

dest="use_dbus", help="Do not provide D-Bus"

2384

" system bus interface", default=None)

1813

" system bus interface")

2385

1814

parser.add_argument("--no-ipv6", action="store_false",

2386

dest="use_ipv6", help="Do not use IPv6",

2387

default=None)

2388

parser.add_argument("--no-restore", action="store_false",

2389

dest="restore", help="Do not restore stored"

2390

" state", default=None)

2391

parser.add_argument("--socket", type=int,

2392

help="Specify a file descriptor to a network"

2393

" socket to use instead of creating one")

2394

parser.add_argument("--statedir", metavar="DIR",

2395

help="Directory to save/restore state in")

2396

parser.add_argument("--foreground", action="store_true",

2397

help="Run in foreground", default=None)

2398

parser.add_argument("--no-zeroconf", action="store_false",

2399

dest="zeroconf", help="Do not use Zeroconf",

2400

default=None)

2401

1815

dest="use_ipv6", help="Do not use IPv6")

2402

1816

options = parser.parse_args()

2403

1817

2404

1818

if options.check:

2405

1819

import doctest

2406

fail_count, test_count = doctest.testmod()

2407

sys.exit(os.EX_OK if fail_count == 0 else 1)

1820

doctest.testmod()

1821

sys.exit()

2408

1822

2409

1823

# Default values for config file for server-global settings

2410

1824

server_defaults = { "interface": "",

2412

1826

"port": "",

2413

1827

"debug": "False",

2414

1828

"priority":

2415

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2416

":+SIGN-DSA-SHA256",

1829

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2417

1830

"servicename": "Mandos",

2418

1831

"use_dbus": "True",

2419

1832

"use_ipv6": "True",

2420

1833

"debuglevel": "",

2421

"restore": "True",

2422

"socket": "",

2423

"statedir": "/var/lib/mandos",

2424

"foreground": "False",

2425

"zeroconf": "True",

2426

}

1834

}

2427

1835

2428

1836

# Parse config file for server-global settings

2429

1837

server_config = configparser.SafeConfigParser(server_defaults)

2430

1838

del server_defaults

2431

server_config.read(os.path.join(options.configdir, "mandos.conf"))

1839

server_config.read(os.path.join(options.configdir,

1840

"mandos.conf"))

2432

1841

# Convert the SafeConfigParser object to a dict

2433

1842

server_settings = server_config.defaults()

2434

1843

# Use the appropriate methods on the non-string config options

2435

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

1844

for option in ("debug", "use_dbus", "use_ipv6"):

2436

1845

server_settings[option] = server_config.getboolean("DEFAULT",

2437

1846

option)

2438

1847

if server_settings["port"]:

2439

1848

server_settings["port"] = server_config.getint("DEFAULT",

2440

1849

"port")

2441

if server_settings["socket"]:

2442

server_settings["socket"] = server_config.getint("DEFAULT",

2443

"socket")

2444

# Later, stdin will, and stdout and stderr might, be dup'ed

2445

# over with an opened os.devnull. But we don't want this to

2446

# happen with a supplied network socket.

2447

if 0 <= server_settings["socket"] <= 2:

2448

server_settings["socket"] = os.dup(server_settings

2449

["socket"])

2450

1850

del server_config

2451

1851

2452

1852

# Override the settings from the config file with command line

2453

1853

# options, if set.

2454

1854

for option in ("interface", "address", "port", "debug",

2455

"priority", "servicename", "configdir", "use_dbus",

2456

"use_ipv6", "debuglevel", "restore", "statedir",

2457

"socket", "foreground", "zeroconf"):

1855

"priority", "servicename", "configdir",

1856

"use_dbus", "use_ipv6", "debuglevel"):

2458

1857

value = getattr(options, option)

2459

1858

if value is not None:

2460

1859

server_settings[option] = value

2461

1860

del options

2462

1861

# Force all strings to be unicode

2463

1862

for option in server_settings.keys():

2464

if isinstance(server_settings[option], bytes):

2465

server_settings[option] = (server_settings[option]

2466

.decode("utf-8"))

2467

# Force all boolean options to be boolean

2468

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2469

"foreground", "zeroconf"):

2470

server_settings[option] = bool(server_settings[option])

2471

# Debug implies foreground

2472

if server_settings["debug"]:

2473

server_settings["foreground"] = True

1863

if type(server_settings[option]) is str:

1864

server_settings[option] = unicode(server_settings[option])

2474

1865

# Now we have our good server settings in "server_settings"

2475

1866

2476

1867

##################################################################

2477

1868

2478

if (not server_settings["zeroconf"]

2479

and not (server_settings["port"]

2480

or server_settings["socket"] != "")):

2481

parser.error("Needs port or socket to work without Zeroconf")

2482

2483

1869

# For convenience

2484

1870

debug = server_settings["debug"]

2485

1871

debuglevel = server_settings["debuglevel"]

2486

1872

use_dbus = server_settings["use_dbus"]

2487

1873

use_ipv6 = server_settings["use_ipv6"]

2488

stored_state_path = os.path.join(server_settings["statedir"],

2489

stored_state_file)

2490

foreground = server_settings["foreground"]

2491

zeroconf = server_settings["zeroconf"]

2492

2493

if debug:

2494

initlogger(debug, logging.DEBUG)

2495

else:

2496

if not debuglevel:

2497

initlogger(debug)

2498

else:

2499

level = getattr(logging, debuglevel.upper())

2500

initlogger(debug, level)

2501

1874

2502

1875

if server_settings["servicename"] != "Mandos":

2503

syslogger.setFormatter(

2504

logging.Formatter('Mandos ({}) [%(process)d]:'

2505

' %(levelname)s: %(message)s'.format(

2506

server_settings["servicename"])))

1876

syslogger.setFormatter(logging.Formatter

1877

('Mandos (%s) [%%(process)d]:'

1878

' %%(levelname)s: %%(message)s'

1879

% server_settings["servicename"]))

2507

1880

2508

1881

# Parse config file with clients

2509

client_config = configparser.SafeConfigParser(Client

2510

.client_defaults)

1882

client_defaults = { "timeout": "5m",

1883

"extended_timeout": "15m",

1884

"interval": "2m",

1885

"checker": "fping -q -- %%(host)s",

1886

"host": "",

1887

"approval_delay": "0s",

1888

"approval_duration": "1s",

1889

}

1890

client_config = configparser.SafeConfigParser(client_defaults)

2511

1891

client_config.read(os.path.join(server_settings["configdir"],

2512

1892

"clients.conf"))

2513

1893

2514

1894

global mandos_dbus_service

2515

1895

mandos_dbus_service = None

2516

1896

2517

socketfd = None

2518

if server_settings["socket"] != "":

2519

socketfd = server_settings["socket"]

2520

tcp_server = MandosServer(

2521

(server_settings["address"], server_settings["port"]),

2522

ClientHandler,

2523

interface=(server_settings["interface"] or None),

2524

use_ipv6=use_ipv6,

2525

gnutls_priority=server_settings["priority"],

2526

use_dbus=use_dbus,

2527

socketfd=socketfd)

2528

if not foreground:

2529

pidfilename = "/run/mandos.pid"

2530

if not os.path.isdir("/run/."):

2531

pidfilename = "/var/run/mandos.pid"

2532

pidfile = None

1897

tcp_server = MandosServer((server_settings["address"],

1898

server_settings["port"]),

1899

ClientHandler,

1900

interface=(server_settings["interface"]

1901

or None),

1902

use_ipv6=use_ipv6,

1903

gnutls_priority=

1904

server_settings["priority"],

1905

use_dbus=use_dbus)

1906

if not debug:

1907

pidfilename = "/var/run/mandos.pid"

2533

1908

try:

2534

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2535

except IOError as e:

2536

logger.error("Could not open file %r", pidfilename,

2537

exc_info=e)

1909

pidfile = open(pidfilename, "w")

1910

except IOError:

1911

logger.error("Could not open file %r", pidfilename)

2538

1912

2539

for name in ("_mandos", "mandos", "nobody"):

1913

try:

1914

uid = pwd.getpwnam("_mandos").pw_uid

1915

gid = pwd.getpwnam("_mandos").pw_gid

1916

except KeyError:

2540

1917

try:

2541

uid = pwd.getpwnam(name).pw_uid

2542

gid = pwd.getpwnam(name).pw_gid

2543

break

1918

uid = pwd.getpwnam("mandos").pw_uid

1919

gid = pwd.getpwnam("mandos").pw_gid

2544

1920

except KeyError:

2545

continue

2546

else:

2547

uid = 65534

2548

gid = 65534

1921

try:

1922

uid = pwd.getpwnam("nobody").pw_uid

1923

gid = pwd.getpwnam("nobody").pw_gid

1924

except KeyError:

1925

uid = 65534

1926

gid = 65534

2549

1927

try:

2550

1928

os.setgid(gid)

2551

1929

os.setuid(uid)

2552

1930

except OSError as error:

2553

if error.errno != errno.EPERM:

2554

raise

1931

if error[0] != errno.EPERM:

1932

raise error

1933

1934

if not debug and not debuglevel:

1935

syslogger.setLevel(logging.WARNING)

1936

console.setLevel(logging.WARNING)

1937

if debuglevel:

1938

level = getattr(logging, debuglevel.upper())

1939

syslogger.setLevel(level)

1940

console.setLevel(level)

2555

1941

2556

1942

if debug:

2557

1943

# Enable all possible GnuTLS debugging

2564

1950

def debug_gnutls(level, string):

2565

1951

logger.debug("GnuTLS: %s", string[:-1])

2566

1952

2567

gnutls.library.functions.gnutls_global_set_log_function(

2568

debug_gnutls)

1953

(gnutls.library.functions

1954

.gnutls_global_set_log_function(debug_gnutls))

2569

1955

2570

1956

# Redirect stdin so all checkers get /dev/null

2571

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1957

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2572

1958

os.dup2(null, sys.stdin.fileno())

2573

1959

if null > 2:

2574

1960

os.close(null)

1961

else:

1962

# No console logging

1963

logger.removeHandler(console)

2575

1964

2576

1965

# Need to fork before connecting to D-Bus

2577

if not foreground:

1966

if not debug:

2578

1967

# Close all input and output, do double fork, etc.

2579

1968

daemon()

2580

1969

2581

# multiprocessing will use threads, so before we use gobject we

2582

# need to inform gobject that threads will be used.

2583

gobject.threads_init()

2584

2585

1970

global main_loop

2586

1971

# From the Avahi example code

2587

DBusGMainLoop(set_as_default=True)

1972

DBusGMainLoop(set_as_default=True )

2588

1973

main_loop = gobject.MainLoop()

2589

1974

bus = dbus.SystemBus()

2590

1975

# End of Avahi example code

2591

1976

if use_dbus:

2592

1977

try:

2593

1978

bus_name = dbus.service.BusName("se.recompile.Mandos",

2594

bus,

2595

do_not_queue=True)

2596

old_bus_name = dbus.service.BusName(

2597

"se.bsnet.fukt.Mandos", bus,

2598

do_not_queue=True)

2599

except dbus.exceptions.DBusException as e:

2600

logger.error("Disabling D-Bus:", exc_info=e)

1979

bus, do_not_queue=True)

1980

old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1981

bus, do_not_queue=True)

1982

except dbus.exceptions.NameExistsException as e:

1983

logger.error(unicode(e) + ", disabling D-Bus")

2601

1984

use_dbus = False

2602

1985

server_settings["use_dbus"] = False

2603

1986

tcp_server.use_dbus = False

2604

if zeroconf:

2605

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2606

service = AvahiServiceToSyslog(

2607

name = server_settings["servicename"],

2608

servicetype = "_mandos._tcp",

2609

protocol = protocol,

2610

bus = bus)

2611

if server_settings["interface"]:

2612

service.interface = if_nametoindex(

2613

server_settings["interface"].encode("utf-8"))

1987

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1988

service = AvahiService(name = server_settings["servicename"],

1989

servicetype = "_mandos._tcp",

1990

protocol = protocol, bus = bus)

1991

if server_settings["interface"]:

1992

service.interface = (if_nametoindex

1993

(str(server_settings["interface"])))

2614

1994

2615

1995

global multiprocessing_manager

2616

1996

multiprocessing_manager = multiprocessing.Manager()

2617

1997

2618

1998

client_class = Client

2619

1999

if use_dbus:

2620

client_class = functools.partial(ClientDBus, bus = bus)

2621

2622

client_settings = Client.config_parser(client_config)

2623

old_client_settings = {}

2624

clients_data = {}

2625

2626

# This is used to redirect stdout and stderr for checker processes

2627

global wnull

2628

wnull = open(os.devnull, "w") # A writable /dev/null

2629

# Only used if server is running in foreground but not in debug

2630

# mode

2631

if debug or not foreground:

2632

wnull.close()

2633

2634

# Get client data and settings from last running state.

2635

if server_settings["restore"]:

2636

try:

2637

with open(stored_state_path, "rb") as stored_state:

2638

clients_data, old_client_settings = pickle.load(

2639

stored_state)

2640

os.remove(stored_state_path)

2641

except IOError as e:

2642

if e.errno == errno.ENOENT:

2643

logger.warning("Could not load persistent state:"

2644

" {}".format(os.strerror(e.errno)))

2645

else:

2646

logger.critical("Could not load persistent state:",

2647

exc_info=e)

2648

raise

2649

except EOFError as e:

2650

logger.warning("Could not load persistent state: "

2651

"EOFError:",

2652

exc_info=e)

2653

2654

with PGPEngine() as pgp:

2655

for client_name, client in clients_data.items():

2656

# Skip removed clients

2657

if client_name not in client_settings:

2658

continue

2659

2660

# Decide which value to use after restoring saved state.

2661

# We have three different values: Old config file,

2662

# new config file, and saved state.

2663

# New config value takes precedence if it differs from old

2664

# config value, otherwise use saved state.

2665

for name, value in client_settings[client_name].items():

2666

try:

2667

# For each value in new config, check if it

2668

# differs from the old config value (Except for

2669

# the "secret" attribute)

2670

if (name != "secret"

2671

and (value !=

2672

old_client_settings[client_name][name])):

2673

client[name] = value

2674

except KeyError:

2675

pass

2676

2677

# Clients who has passed its expire date can still be

2678

# enabled if its last checker was successful. A Client

2679

# whose checker succeeded before we stored its state is

2680

# assumed to have successfully run all checkers during

2681

# downtime.

2682

if client["enabled"]:

2683

if datetime.datetime.utcnow() >= client["expires"]:

2684

if not client["last_checked_ok"]:

2685

logger.warning(

2686

"disabling client {} - Client never "

2687

"performed a successful checker".format(

2688

client_name))

2689

client["enabled"] = False

2690

elif client["last_checker_status"] != 0:

2691

logger.warning(

2692

"disabling client {} - Client last"

2693

" checker failed with error code"

2694

" {}".format(

2695

client_name,

2696

client["last_checker_status"]))

2697

client["enabled"] = False

2698

else:

2699

client["expires"] = (

2700

datetime.datetime.utcnow()

2701

+ client["timeout"])

2702

logger.debug("Last checker succeeded,"

2703

" keeping {} enabled".format(

2704

client_name))

2000

client_class = functools.partial(ClientDBusTransitional, bus = bus)

2001

def client_config_items(config, section):

2002

special_settings = {

2003

"approved_by_default":

2004

lambda: config.getboolean(section,

2005

"approved_by_default"),

2006

}

2007

for name, value in config.items(section):

2705

2008

try:

2706

client["secret"] = pgp.decrypt(

2707

client["encrypted_secret"],

2708

client_settings[client_name]["secret"])

2709

except PGPError:

2710

# If decryption fails, we use secret from new settings

2711

logger.debug("Failed to decrypt {} old secret".format(

2712

client_name))

2713

client["secret"] = (client_settings[client_name]

2714

["secret"])

2715

2716

# Add/remove clients based on new changes made to config

2717

for client_name in (set(old_client_settings)

2718

- set(client_settings)):

2719

del clients_data[client_name]

2720

for client_name in (set(client_settings)

2721

- set(old_client_settings)):

2722

clients_data[client_name] = client_settings[client_name]

2723

2724

# Create all client objects

2725

for client_name, client in clients_data.items():

2726

tcp_server.clients[client_name] = client_class(

2727

name = client_name,

2728

settings = client,

2729

server_settings = server_settings)

2730

2009

yield (name, special_settings[name]())

2010

except KeyError:

2011

yield (name, value)

2012

2013

tcp_server.clients.update(set(

2014

client_class(name = section,

2015

config= dict(client_config_items(

2016

client_config, section)))

2017

for section in client_config.sections()))

2731

2018

if not tcp_server.clients:

2732

2019

logger.warning("No clients defined")

2733

2734

if not foreground:

2735

if pidfile is not None:

2736

pid = os.getpid()

2737

try:

2738

with pidfile:

2739

print(pid, file=pidfile)

2740

except IOError:

2741

logger.error("Could not write to file %r with PID %d",

2742

pidfilename, pid)

2743

del pidfile

2020

2021

if not debug:

2022

try:

2023

with pidfile:

2024

pid = os.getpid()

2025

pidfile.write(str(pid) + "\n".encode("utf-8"))

2026

del pidfile

2027

except IOError:

2028

logger.error("Could not write to file %r with PID %d",

2029

pidfilename, pid)

2030

except NameError:

2031

# "pidfile" was never created

2032

pass

2744

2033

del pidfilename

2034

2035

signal.signal(signal.SIGINT, signal.SIG_IGN)

2745

2036

2746

2037

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2747

2038

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

2748

2039

2749

2040

if use_dbus:

2750

2751

@alternate_dbus_interfaces(

2752

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2753

class MandosDBusService(DBusObjectWithProperties):

2041

class MandosDBusService(dbus.service.Object):

2754

2042

"""A D-Bus proxy object"""

2755

2756

2043

def __init__(self):

2757

2044

dbus.service.Object.__init__(self, bus, "/")

2758

2759

2045

_interface = "se.recompile.Mandos"

2760

2046

2761

@dbus_interface_annotations(_interface)

2762

def _foo(self):

2763

return {

2764

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2765

"false" }

2766

2767

2047

@dbus.service.signal(_interface, signature="o")

2768

2048

def ClientAdded(self, objpath):

2769

2049

"D-Bus signal"

2782

2062

@dbus.service.method(_interface, out_signature="ao")

2783

2063

def GetAllClients(self):

2784

2064

"D-Bus method"

2785

return dbus.Array(c.dbus_object_path for c in

2786

tcp_server.clients.itervalues())

2065

return dbus.Array(c.dbus_object_path

2066

for c in tcp_server.clients)

2787

2067

2788

2068

@dbus.service.method(_interface,

2789

2069

out_signature="a{oa{sv}}")

2790

2070

def GetAllClientsWithProperties(self):

2791

2071

"D-Bus method"

2792

2072

return dbus.Dictionary(

2793

{ c.dbus_object_path: c.GetAll("")

2794

for c in tcp_server.clients.itervalues() },

2073

((c.dbus_object_path, c.GetAll(""))

2074

for c in tcp_server.clients),

2795

2075

signature="oa{sv}")

2796

2076

2797

2077

@dbus.service.method(_interface, in_signature="o")

2798

2078

def RemoveClient(self, object_path):

2799

2079

"D-Bus method"

2800

for c in tcp_server.clients.itervalues():

2080

for c in tcp_server.clients:

2801

2081

if c.dbus_object_path == object_path:

2802

del tcp_server.clients[c.name]

2082

tcp_server.clients.remove(c)

2803

2083

c.remove_from_connection()

2804

2084

# Don't signal anything except ClientRemoved

2805

2085

c.disable(quiet=True)

2810

2090

2811

2091

del _interface

2812

2092

2813

mandos_dbus_service = MandosDBusService()

2093

class MandosDBusServiceTransitional(MandosDBusService):

2094

__metaclass__ = AlternateDBusNamesMetaclass

2095

mandos_dbus_service = MandosDBusServiceTransitional()

2814

2096

2815

2097

def cleanup():

2816

2098

"Cleanup function; run on exit"

2817

if zeroconf:

2818

service.cleanup()

2819

2820

multiprocessing.active_children()

2821

wnull.close()

2822

if not (tcp_server.clients or client_settings):

2823

return

2824

2825

# Store client before exiting. Secrets are encrypted with key

2826

# based on what config file has. If config file is

2827

# removed/edited, old secret will thus be unrecovable.

2828

clients = {}

2829

with PGPEngine() as pgp:

2830

for client in tcp_server.clients.itervalues():

2831

key = client_settings[client.name]["secret"]

2832

client.encrypted_secret = pgp.encrypt(client.secret,

2833

key)

2834

client_dict = {}

2835

2836

# A list of attributes that can not be pickled

2837

# + secret.

2838

exclude = { "bus", "changedstate", "secret",

2839

"checker", "server_settings" }

2840

for name, typ in inspect.getmembers(dbus.service

2841

.Object):

2842

exclude.add(name)

2843

2844

client_dict["encrypted_secret"] = (client

2845

.encrypted_secret)

2846

for attr in client.client_structure:

2847

if attr not in exclude:

2848

client_dict[attr] = getattr(client, attr)

2849

2850

clients[client.name] = client_dict

2851

del client_settings[client.name]["secret"]

2852

2853

try:

2854

with tempfile.NamedTemporaryFile(

2855

mode='wb',

2856

suffix=".pickle",

2857

prefix='clients-',

2858

dir=os.path.dirname(stored_state_path),

2859

delete=False) as stored_state:

2860

pickle.dump((clients, client_settings), stored_state)

2861

tempname = stored_state.name

2862

os.rename(tempname, stored_state_path)

2863

except (IOError, OSError) as e:

2864

if not debug:

2865

try:

2866

os.remove(tempname)

2867

except NameError:

2868

pass

2869

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2870

logger.warning("Could not save persistent state: {}"

2871

.format(os.strerror(e.errno)))

2872

else:

2873

logger.warning("Could not save persistent state:",

2874

exc_info=e)

2875

raise

2876

2877

# Delete all clients, and settings from config

2099

service.cleanup()

2100

2878

2101

while tcp_server.clients:

2879

name, client = tcp_server.clients.popitem()

2102

client = tcp_server.clients.pop()

2880

2103

if use_dbus:

2881

2104

client.remove_from_connection()

2105

client.disable_hook = None

2882

2106

# Don't signal anything except ClientRemoved

2883

2107

client.disable(quiet=True)

2884

2108

if use_dbus:

2885

2109

# Emit D-Bus signal

2886

mandos_dbus_service.ClientRemoved(

2887

client.dbus_object_path, client.name)

2888

client_settings.clear()

2110

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2111

client.name)

2889

2112

2890

2113

atexit.register(cleanup)

2891

2114

2892

for client in tcp_server.clients.itervalues():

2115

for client in tcp_server.clients:

2893

2116

if use_dbus:

2894

2117

# Emit D-Bus signal

2895

2118

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2896

# Need to initiate checking of clients

2897

if client.enabled:

2898

client.init_checker()

2119

client.enable()

2899

2120

2900

2121

tcp_server.enable()

2901

2122

tcp_server.server_activate()

2902

2123

2903

2124

# Find out what port we got

2904

if zeroconf:

2905

service.port = tcp_server.socket.getsockname()[1]

2125

service.port = tcp_server.socket.getsockname()[1]

2906

2126

if use_ipv6:

2907

2127

logger.info("Now listening on address %r, port %d,"

2908

" flowinfo %d, scope_id %d",

2909

*tcp_server.socket.getsockname())

2128

" flowinfo %d, scope_id %d"

2129

% tcp_server.socket.getsockname())

2910

2130

else: # IPv4

2911

logger.info("Now listening on address %r, port %d",

2912

*tcp_server.socket.getsockname())

2131

logger.info("Now listening on address %r, port %d"

2132

% tcp_server.socket.getsockname())

2913

2133

2914

2134

#service.interface = tcp_server.socket.getsockname()[3]

2915

2135

2916

2136

try:

2917

if zeroconf:

2918

# From the Avahi example code

2919

try:

2920

service.activate()

2921

except dbus.exceptions.DBusException as error:

2922

logger.critical("D-Bus Exception", exc_info=error)

2923

cleanup()

2924

sys.exit(1)

2925

# End of Avahi example code

2137

# From the Avahi example code

2138

try:

2139

service.activate()

2140

except dbus.exceptions.DBusException as error:

2141

logger.critical("DBusException: %s", error)

2142

cleanup()

2143

sys.exit(1)

2144

# End of Avahi example code

2926

2145

2927

2146

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2928

2147

lambda *args, **kwargs:

2932

2151

logger.debug("Starting main loop")

2933

2152

main_loop.run()

2934

2153

except AvahiError as error:

2935

logger.critical("Avahi Error", exc_info=error)

2154

logger.critical("AvahiError: %s", error)

2936

2155

cleanup()

2937

2156

sys.exit(1)

2938

2157

except KeyboardInterrupt: