/mandos/trunk : revision 589

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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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import SocketServer as socketserver

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import socket

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import argparse

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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 dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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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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version = "1.5.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.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(str("16s16x"),

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interface))

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

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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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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.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--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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return b"mandos" + binascii.hexlify(password)

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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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, 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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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):

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

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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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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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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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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raise AvahiGroupError("State changed: {0!s}"

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.format(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()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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

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def _timedelta_to_milliseconds(td):

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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('Mandos ({0}) [%(process)d]:'

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"last_approval_request", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

493

"enabled")

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

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.replace(" ", ""))

497

if "secret" in section:

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

499

elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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raise TypeError("No secret or secfile for section {0}"

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

517

client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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self.name = name

339

if config is None:

340

config = {}

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# adding all client settings

525

for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

530

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

536

self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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542

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

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if "secret" in config:

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

350

elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

359

self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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self.extended_timeout = string_to_delta(config

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["extended_timeout"])

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

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self.disable_hook = disable_hook

543

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

372

self.expires = None

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550

self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

552

self.approved = None

380

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self.approvals_pending = 0

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

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config["approval_duration"])

385

554

self.changedstate = (multiprocessing_manager

386

555

.Condition(multiprocessing_manager

387

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

559

if not attr.startswith("_")]

560

self.client_structure.append("client_structure")

561

562

for name, t in inspect.getmembers(type(self),

563

lambda obj:

564

isinstance(obj,

565

property)):

566

if not name.startswith("_"):

567

self.client_structure.append(name)

388

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569

# Send notice to process children that client state has changed

389

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def send_changedstate(self):

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

571

with self.changedstate:

572

self.changedstate.notify_all()

393

573

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574

def enable(self):

395

575

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

396

576

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

397

577

# Already enabled

398

578

return

579

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

580

self.enabled = True

581

self.last_enabled = datetime.datetime.utcnow()

582

self.init_checker()

399

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self.send_changedstate()

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585

def disable(self, quiet=True):

586

"""Disable this client."""

587

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

588

return False

589

if not quiet:

590

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

591

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

592

gobject.source_remove(self.disable_initiator_tag)

593

self.disable_initiator_tag = None

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self.expires = None

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

596

gobject.source_remove(self.checker_initiator_tag)

597

self.checker_initiator_tag = None

598

self.stop_checker()

599

self.enabled = False

600

if not quiet:

601

self.send_changedstate()

602

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

603

return False

604

605

def __del__(self):

606

self.disable()

607

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def init_checker(self):

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

401

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# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

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613

self.checker_initiator_tag = (gobject.timeout_add

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614

(self.interval_milliseconds(),

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self.start_checker))

405

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

406

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

407

619

self.disable_initiator_tag = (gobject.timeout_add

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620

(self.timeout_milliseconds(),

409

621

self.disable))

410

self.enabled = True

411

self.last_enabled = datetime.datetime.utcnow()

412

622

# Also start a new checker *right now*.

413

623

self.start_checker()

414

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415

def disable(self, quiet=True):

416

"""Disable this client."""

417

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

418

return False

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

422

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

423

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

424

gobject.source_remove(self.disable_initiator_tag)

425

self.disable_initiator_tag = None

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self.expires = None

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

428

gobject.source_remove(self.checker_initiator_tag)

429

self.checker_initiator_tag = None

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

433

self.enabled = False

434

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

435

return False

436

437

def __del__(self):

438

self.disable_hook = None

439

self.disable()

440

441

625

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

442

626

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

443

627

self.checker_callback_tag = None

444

628

self.checker = None

445

629

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

448

632

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

449

633

vars(self))

450

634

self.checked_ok()

452

636

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

453

637

vars(self))

454

638

else:

639

self.last_checker_status = -1

455

640

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

456

641

vars(self))

457

642

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

643

def checked_ok(self):

644

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

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

464

651

if timeout is None:

465

652

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

467

gobject.source_remove(self.disable_initiator_tag)

468

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

469

self.disable_initiator_tag = (gobject.timeout_add

470

(_timedelta_to_milliseconds

471

(timeout), self.disable))

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

660

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

472

661

473

662

def need_approval(self):

474

663

self.last_approval_request = datetime.datetime.utcnow()

479

668

If a checker already exists, leave it running and do

480

669

nothing."""

481

670

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

482

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

483

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

484

# client would inevitably timeout, since no checker would get

485

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

486

675

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

487

676

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

488

677

# should be.

502

691

self.current_checker_command)

503

692

# Start a new checker if needed

504

693

if self.checker is None:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

505

699

try:

506

# In case checker_command has exactly one % operator

507

command = self.checker_command % self.host

508

except TypeError:

509

# Escape attributes for the shell

510

escaped_attrs = dict(

511

(attr,

512

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

513

errors=

514

'replace')))

515

for attr in

516

self.runtime_expansions)

517

518

try:

519

command = self.checker_command % escaped_attrs

520

except TypeError as error:

521

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

522

' %s', self.checker_command, error)

523

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

524

705

self.current_checker_command = command

525

706

try:

526

707

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

532

713

self.checker = subprocess.Popen(command,

533

714

close_fds=True,

534

715

shell=True, cwd="/")

535

self.checker_callback_tag = (gobject.child_watch_add

536

(self.checker.pid,

537

self.checker_callback,

538

data=command))

539

# The checker may have completed before the gobject

540

# watch was added. Check for this.

541

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

542

if pid:

543

gobject.source_remove(self.checker_callback_tag)

544

self.checker_callback(pid, status, command)

545

716

except OSError as error:

546

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

547

error)

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

548

729

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

549

730

return True

550

731

557

738

return

558

739

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

559

740

try:

560

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

741

self.checker.terminate()

561

742

#time.sleep(0.5)

562

743

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

563

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

744

# self.checker.kill()

564

745

except OSError as error:

565

746

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

566

747

raise

583

764

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

584

765

if byte_arrays and signature != "ay":

585

766

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

586

" signature %r" % signature)

767

" signature {0!r}".format(signature))

587

768

def decorator(func):

588

769

func._dbus_is_property = True

589

770

func._dbus_interface = dbus_interface

597

778

return decorator

598

779

599

780

781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

600

818

class DBusPropertyException(dbus.exceptions.DBusException):

601

819

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

602

820

"""

625

843

"""

626

844

627

845

@staticmethod

628

def _is_dbus_property(obj):

629

return getattr(obj, "_dbus_is_property", False)

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

853

False)

630

854

631

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

632

856

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

633

857

"""

634

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

858

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

859

name),

860

athing.__get__(self))

635

861

for cls in self.__class__.__mro__

636

for name, prop in

637

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

638

865

639

866

def _get_dbus_property(self, interface_name, property_name):

640

867

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

642

869

"""

643

870

for cls in self.__class__.__mro__:

644

871

for name, value in (inspect.getmembers

645

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

646

874

if (value._dbus_name == property_name

647

875

and value._dbus_interface == interface_name):

648

876

return value.__get__(self)

677

905

# signatures other than "ay".

678

906

if prop._dbus_signature != "ay":

679

907

raise ValueError

680

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

681

for byte in value))

908

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

909

for byte in value))

682

910

prop(value)

683

911

684

912

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

689

917

690

918

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

691

919

"""

692

all = {}

693

for name, prop in self._get_all_dbus_properties():

920

properties = {}

921

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

694

922

if (interface_name

695

923

and interface_name != prop._dbus_interface):

696

924

# Interface non-empty but did not match

700

928

continue

701

929

value = prop()

702

930

if not hasattr(value, "variant_level"):

703

all[name] = value

931

properties[name] = value

704

932

continue

705

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

706

value.variant_level+1)

707

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

933

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

934

value.variant_level+1)

935

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

708

936

709

937

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

710

938

out_signature="s",

711

939

path_keyword='object_path',

712

940

connection_keyword='connection')

713

941

def Introspect(self, object_path, connection):

714

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

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

715

945

"""

716

946

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

717

947

connection)

724

954

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

725

955

return e

726

956

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

957

# Add property tags

727

958

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

728

959

for name, prop

729

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

730

961

if prop._dbus_interface

731

962

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

732

963

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

733

995

# Add the names to the return values for the

734

996

# "org.freedesktop.DBus.Properties" methods

735

997

if (if_tag.getAttribute("name")

750

1012

except (AttributeError, xml.dom.DOMException,

751

1013

xml.parsers.expat.ExpatError) as error:

752

1014

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

753

error)

1015

exc_info=error)

754

1016

return xmlstring

755

1017

756

1018

757

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

758

1020

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

759

1021

if dt is None:

760

1022

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

761

1023

return dbus.String(dt.isoformat(),

762

1024

variant_level=variant_level)

763

1025

764

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

765

.__metaclass__):

766

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

767

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

1026

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

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

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

768

1049

"""

769

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

770

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

771

# methods, signals, or properties in them

772

for base in (b for b in bases

773

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

774

# Go though all attributes of the base class

775

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

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

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

776

1057

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

777

1058

# with the wrong interface name

778

1059

if (not hasattr(attribute, "_dbus_interface")

779

1060

or not attribute._dbus_interface

780

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

1061

.startswith(orig_interface_name)):

781

1062

continue

782

1063

# Create an alternate D-Bus interface name based on

783

1064

# the current name

784

1065

alt_interface = (attribute._dbus_interface

785

.replace("se.recompile.Mandos",

786

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

787

1069

# Is this a D-Bus signal?

788

1070

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

789

1071

# Extract the original non-method function by

804

1086

nonmethod_func.func_name,

805

1087

nonmethod_func.func_defaults,

806

1088

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

807

1095

# Define a creator of a function to call both the

808

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

809

# signals gets sent when the function is called

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

810

1099

def fixscope(func1, func2):

811

1100

"""This function is a scope container to pass

812

1101

func1 and func2 to the "call_both" function

819

1108

return call_both

820

1109

# Create the "call_both" function and add it to

821

1110

# the class

822

attr[attrname] = fixscope(attribute,

823

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

824

1112

# Is this a D-Bus method?

825

1113

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

826

1114

# Create a new, but exactly alike, function

837

1125

attribute.func_name,

838

1126

attribute.func_defaults,

839

1127

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

840

1134

# Is this a D-Bus property?

841

1135

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

842

1136

# Create a new, but exactly alike, function

856

1150

attribute.func_name,

857

1151

attribute.func_defaults,

858

1152

attribute.func_closure)))

859

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

860

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

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

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

cls = type(b"{0}Alternate".format(cls.__name__),

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

861

1198

class ClientDBus(Client, DBusObjectWithProperties):

862

1199

"""A Client class using D-Bus

863

1200

872

1209

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

873

1210

874

1211

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

875

self._approvals_pending = 0

876

1212

self.bus = bus

877

1213

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

878

1214

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

884

1220

("/clients/" + client_object_name))

885

1221

DBusObjectWithProperties.__init__(self, self.bus,

886

1222

self.dbus_object_path)

887

1223

888

1224

def notifychangeproperty(transform_func,

889

1225

dbus_name, type_func=lambda x: x,

890

1226

variant_level=1):

891

1227

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

892

1228

its changes to DBus.

893

894

transform_fun: Function that takes a value and transforms it

895

to a D-Bus type.

1229

1230

transform_fun: Function that takes a value and a variant_level

1231

and transforms it to a D-Bus type.

896

1232

dbus_name: D-Bus name of the variable

897

1233

type_func: Function that transform the value before sending it

898

1234

to the D-Bus. Default: no transform

905

1241

type_func(getattr(self, attrname, None))

906

1242

!= type_func(value)):

907

1243

dbus_value = transform_func(type_func(value),

908

variant_level)

1244

variant_level

1245

=variant_level)

909

1246

self.PropertyChanged(dbus.String(dbus_name),

910

1247

dbus_value)

911

1248

setattr(self, attrname, value)

912

1249

913

1250

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

914

1251

915

916

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

917

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

918

1254

"ApprovalPending",

925

1261

checker is not None)

926

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

927

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

928

1266

last_approval_request = notifychangeproperty(

929

1267

datetime_to_dbus, "LastApprovalRequest")

930

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

931

1269

"ApprovedByDefault")

932

approval_delay = notifychangeproperty(dbus.UInt16,

1270

approval_delay = notifychangeproperty(dbus.UInt64,

933

1271

"ApprovalDelay",

934

1272

type_func =

935

_timedelta_to_milliseconds)

1273

timedelta_to_milliseconds)

936

1274

approval_duration = notifychangeproperty(

937

dbus.UInt16, "ApprovalDuration",

938

type_func = _timedelta_to_milliseconds)

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

939

1277

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

940

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

1278

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

941

1279

type_func =

942

_timedelta_to_milliseconds)

1280

timedelta_to_milliseconds)

943

1281

extended_timeout = notifychangeproperty(

944

dbus.UInt16, "ExtendedTimeout",

945

type_func = _timedelta_to_milliseconds)

946

interval = notifychangeproperty(dbus.UInt16,

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

947

1285

"Interval",

948

1286

type_func =

949

_timedelta_to_milliseconds)

1287

timedelta_to_milliseconds)

950

1288

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

951

1289

952

1290

del notifychangeproperty

994

1332

return r

995

1333

996

1334

def _reset_approved(self):

997

self._approved = None

1335

self.approved = None

998

1336

return False

999

1337

1000

1338

def approve(self, value=True):

1001

self.send_changedstate()

1002

self._approved = value

1003

gobject.timeout_add(_timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1004

1341

(self.approval_duration),

1005

1342

self._reset_approved)

1006

1343

self.send_changedstate()

1007

1344

1008

1345

## D-Bus methods, signals & properties

1009

1346

_interface = "se.recompile.Mandos.Client"

1010

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1011

1355

## Signals

1012

1356

1013

1357

# CheckerCompleted - signal

1112

1456

access="readwrite")

1113

1457

def ApprovalDuration_dbus_property(self, value=None):

1114

1458

if value is None: # get

1115

return dbus.UInt64(_timedelta_to_milliseconds(

1459

return dbus.UInt64(timedelta_to_milliseconds(

1116

1460

self.approval_duration))

1117

1461

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

1118

1462

1132

1476

def Host_dbus_property(self, value=None):

1133

1477

if value is None: # get

1134

1478

return dbus.String(self.host)

1135

self.host = value

1479

self.host = unicode(value)

1136

1480

1137

1481

# Created - property

1138

1482

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

1139

1483

def Created_dbus_property(self):

1140

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

1484

return datetime_to_dbus(self.created)

1141

1485

1142

1486

# LastEnabled - property

1143

1487

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

1164

1508

return

1165

1509

return datetime_to_dbus(self.last_checked_ok)

1166

1510

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1167

1517

# Expires - property

1168

1518

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

1169

1519

def Expires_dbus_property(self):

1180

1530

def Timeout_dbus_property(self, value=None):

1181

1531

if value is None: # get

1182

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1183

1534

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

1184

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

1185

return

1186

# Reschedule timeout

1187

gobject.source_remove(self.disable_initiator_tag)

1188

self.disable_initiator_tag = None

1189

self.expires = None

1190

time_to_die = (self.

1191

_timedelta_to_milliseconds((self

1192

.last_checked_ok

1193

+ self.timeout)

1194

- datetime.datetime

1195

.utcnow()))

1196

if time_to_die <= 0:

1197

# The timeout has passed

1198

self.disable()

1199

else:

1200

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

1201

+ datetime.timedelta(milliseconds =

1202

time_to_die))

1203

self.disable_initiator_tag = (gobject.timeout_add

1204

(time_to_die, self.disable))

1535

# Reschedule disabling

1536

if self.enabled:

1537

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1540

# The timeout has passed

1541

self.disable()

1542

else:

1543

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

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1205

1551

1206

1552

# ExtendedTimeout - property

1207

1553

@dbus_service_property(_interface, signature="t",

1220

1566

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

1221

1567

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

1222

1568

return

1223

# Reschedule checker run

1224

gobject.source_remove(self.checker_initiator_tag)

1225

self.checker_initiator_tag = (gobject.timeout_add

1226

(value, self.start_checker))

1227

self.start_checker() # Start one now, too

1569

if self.enabled:

1570

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1228

1575

1229

1576

# Checker - property

1230

1577

@dbus_service_property(_interface, signature="s",

1232

1579

def Checker_dbus_property(self, value=None):

1233

1580

if value is None: # get

1234

1581

return dbus.String(self.checker_command)

1235

self.checker_command = value

1582

self.checker_command = unicode(value)

1236

1583

1237

1584

# CheckerRunning - property

1238

1585

@dbus_service_property(_interface, signature="b",

1267

1614

raise KeyError()

1268

1615

1269

1616

def __getattribute__(self, name):

1270

if(name == '_pipe'):

1617

if name == '_pipe':

1271

1618

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

1272

1619

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

1273

1620

data = self._pipe.recv()

1280

1627

return func

1281

1628

1282

1629

def __setattr__(self, name, value):

1283

if(name == '_pipe'):

1630

if name == '_pipe':

1284

1631

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

1285

1632

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

1286

1633

1287

class ClientDBusTransitional(ClientDBus):

1288

__metaclass__ = AlternateDBusNamesMetaclass

1289

1634

1290

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1291

1636

"""A class to handle client connections.

1374

1719

client.Rejected("Disabled")

1375

1720

return

1376

1721

1377

if client._approved or not client.approval_delay:

1722

if client.approved or not client.approval_delay:

1378

1723

#We are approved or approval is disabled

1379

1724

break

1380

elif client._approved is None:

1725

elif client.approved is None:

1381

1726

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

1382

1727

client.name)

1383

1728

if self.server.use_dbus:

1394

1739

return

1395

1740

1396

1741

#wait until timeout or approved

1397

#x = float(client

1398

# ._timedelta_to_milliseconds(delay))

1399

1742

time = datetime.datetime.now()

1400

1743

client.changedstate.acquire()

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1404

1747

client.changedstate.release()

1405

1748

time2 = datetime.datetime.now()

1406

1749

if (time2 - time) >= delay:

1422

1765

try:

1423

1766

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

1424

1767

except gnutls.errors.GNUTLSError as error:

1425

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1426

1770

return

1427

1771

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

1428

1772

sent, len(client.secret)

1430

1774

sent_size += sent

1431

1775

1432

1776

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

1433

# bump the timeout as if seen

1434

client.checked_ok(client.extended_timeout)

1777

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1435

1779

if self.server.use_dbus:

1436

1780

# Emit D-Bus signal

1437

1781

client.GotSecret()

1442

1786

try:

1443

1787

session.bye()

1444

1788

except gnutls.errors.GNUTLSError as error:

1445

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1446

1791

1447

1792

@staticmethod

1448

1793

def peer_certificate(session):

1504

1849

# Convert the buffer to a Python bytestring

1505

1850

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

1506

1851

# Convert the bytestring to hexadecimal notation

1507

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

1852

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

1508

1853

return hex_fpr

1509

1854

1510

1855

1513

1858

def sub_process_main(self, request, address):

1514

1859

try:

1515

1860

self.finish_request(request, address)

1516

except:

1861

except Exception:

1517

1862

self.handle_error(request, address)

1518

1863

self.close_request(request)

1519

1864

1520

1865

def process_request(self, request, address):

1521

1866

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

1522

multiprocessing.Process(target = self.sub_process_main,

1523

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

1867

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

1868

args = (request, address))

1869

proc.start()

1870

return proc

1524

1871

1525

1872

1526

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1532

1879

"""

1533

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1534

1881

1535

super(MultiprocessingMixInWithPipe,

1536

self).process_request(request, client_address)

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1537

1884

self.child_pipe.close()

1538

self.add_pipe(parent_pipe)

1885

self.add_pipe(parent_pipe, proc)

1539

1886

1540

def add_pipe(self, parent_pipe):

1887

def add_pipe(self, parent_pipe, proc):

1541

1888

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

1542

1889

raise NotImplementedError

1543

1890

1574

1921

str(self.interface

1575

1922

+ '\0'))

1576

1923

except socket.error as error:

1577

if error[0] == errno.EPERM:

1924

if error.errno == errno.EPERM:

1578

1925

logger.error("No permission to"

1579

1926

" bind to interface %s",

1580

1927

self.interface)

1581

elif error[0] == errno.ENOPROTOOPT:

1928

elif error.errno == errno.ENOPROTOOPT:

1582

1929

logger.error("SO_BINDTODEVICE not available;"

1583

1930

" cannot bind to interface %s",

1584

1931

self.interface)

1932

elif error.errno == errno.ENODEV:

1933

logger.error("Interface %s does not"

1934

" exist, cannot bind",

1935

self.interface)

1585

1936

else:

1586

1937

raise

1587

1938

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

1621

1972

self.enabled = False

1622

1973

self.clients = clients

1623

1974

if self.clients is None:

1624

self.clients = set()

1975

self.clients = {}

1625

1976

self.use_dbus = use_dbus

1626

1977

self.gnutls_priority = gnutls_priority

1627

1978

IPv6_TCPServer.__init__(self, server_address,

1631

1982

def server_activate(self):

1632

1983

if self.enabled:

1633

1984

return socketserver.TCPServer.server_activate(self)

1985

1634

1986

def enable(self):

1635

1987

self.enabled = True

1636

def add_pipe(self, parent_pipe):

1988

1989

def add_pipe(self, parent_pipe, proc):

1637

1990

# Call "handle_ipc" for both data and EOF events

1638

1991

gobject.io_add_watch(parent_pipe.fileno(),

1639

1992

gobject.IO_IN | gobject.IO_HUP,

1640

1993

functools.partial(self.handle_ipc,

1641

1994

parent_pipe =

1642

parent_pipe))

1643

1995

parent_pipe,

1996

proc = proc))

1997

1644

1998

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

1645

client_object=None):

1646

condition_names = {

1647

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

1648

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

1649

# blocking).

1650

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

1651

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

1652

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

1653

# broken, usually for pipes and

1654

# sockets).

1655

}

1656

conditions_string = ' | '.join(name

1657

for cond, name in

1658

condition_names.iteritems()

1659

if cond & condition)

1660

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

1661

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

1999

proc = None, client_object=None):

2000

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

2001

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

2002

# Wait for other process to exit

2003

proc.join()

1662

2004

return False

1663

2005

1664

2006

# Read a request from the child

1669

2011

fpr = request[1]

1670

2012

address = request[2]

1671

2013

1672

for c in self.clients:

2014

for c in self.clients.itervalues():

1673

2015

if c.fingerprint == fpr:

1674

2016

client = c

1675

2017

break

1688

2030

functools.partial(self.handle_ipc,

1689

2031

parent_pipe =

1690

2032

parent_pipe,

2033

proc = proc,

1691

2034

client_object =

1692

2035

client))

1693

2036

parent_pipe.send(True)

1751

2094

elif suffix == "w":

1752

2095

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

1753

2096

else:

1754

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

2097

raise ValueError("Unknown suffix {0!r}"

2098

.format(suffix))

1755

2099

except (ValueError, IndexError) as e:

1756

2100

raise ValueError(*(e.args))

1757

2101

timevalue += delta

1758

2102

return timevalue

1759

2103

1760

2104

1761

def if_nametoindex(interface):

1762

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

1763

1764

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

1765

global if_nametoindex

1766

try:

1767

if_nametoindex = (ctypes.cdll.LoadLibrary

1768

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

1769

.if_nametoindex)

1770

except (OSError, AttributeError):

1771

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

1772

def if_nametoindex(interface):

1773

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

1774

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

1775

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

1776

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1777

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

1778

interface))

1779

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

1780

ifreq[16:20])[0]

1781

return interface_index

1782

return if_nametoindex(interface)

1783

1784

1785

2105

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

1786

2106

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

1787

2107

1795

2115

sys.exit()

1796

2116

if not noclose:

1797

2117

# Close all standard open file descriptors

1798

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

2118

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

1799

2119

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

1800

2120

raise OSError(errno.ENODEV,

1801

"%s not a character device"

1802

% os.path.devnull)

2121

"{0} not a character device"

2122

.format(os.devnull))

1803

2123

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

1804

2124

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

1805

2125

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

1814

2134

1815

2135

parser = argparse.ArgumentParser()

1816

2136

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

1817

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

2137

version = "%(prog)s {0}".format(version),

1818

2138

help="show version number and exit")

1819

2139

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

1820

2140

help="Bind to interface IF")

1842

2162

" system bus interface")

1843

2163

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

1844

2164

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

2165

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

2166

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

2167

" state")

2168

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

2169

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

2170

1845

2171

options = parser.parse_args()

1846

2172

1847

2173

if options.check:

1860

2186

"use_dbus": "True",

1861

2187

"use_ipv6": "True",

1862

2188

"debuglevel": "",

2189

"restore": "True",

2190

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

1863

2191

}

1864

2192

1865

2193

# Parse config file for server-global settings

1882

2210

# options, if set.

1883

2211

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

1884

2212

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

1885

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

2213

"use_dbus", "use_ipv6", "debuglevel", "restore",

2214

"statedir"):

1886

2215

value = getattr(options, option)

1887

2216

if value is not None:

1888

2217

server_settings[option] = value

1900

2229

debuglevel = server_settings["debuglevel"]

1901

2230

use_dbus = server_settings["use_dbus"]

1902

2231

use_ipv6 = server_settings["use_ipv6"]

2232

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

2233

stored_state_file)

2234

2235

if debug:

2236

initlogger(debug, logging.DEBUG)

2237

else:

2238

if not debuglevel:

2239

initlogger(debug)

2240

else:

2241

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

2242

initlogger(debug, level)

1903

2243

1904

2244

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

1905

2245

syslogger.setFormatter(logging.Formatter

1906

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

1907

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

1908

% server_settings["servicename"]))

2246

('Mandos ({0}) [%(process)d]:'

2247

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

2248

.format(server_settings

2249

["servicename"])))

1909

2250

1910

2251

# Parse config file with clients

1911

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

1912

"extended_timeout": "15m",

1913

"interval": "2m",

1914

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

1915

"host": "",

1916

"approval_delay": "0s",

1917

"approval_duration": "1s",

1918

}

1919

client_config = configparser.SafeConfigParser(client_defaults)

2252

client_config = configparser.SafeConfigParser(Client

2253

.client_defaults)

1920

2254

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

1921

2255

"clients.conf"))

1922

2256

1936

2270

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

1937

2271

try:

1938

2272

pidfile = open(pidfilename, "w")

1939

except IOError:

1940

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

2273

except IOError as e:

2274

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

2275

exc_info=e)

1941

2276

1942

try:

1943

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

1944

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

1945

except KeyError:

2277

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

1946

2278

try:

1947

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

1948

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

2279

uid = pwd.getpwnam(name).pw_uid

2280

gid = pwd.getpwnam(name).pw_gid

2281

break

1949

2282

except KeyError:

1950

try:

1951

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

1952

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

1953

except KeyError:

1954

uid = 65534

1955

gid = 65534

2283

continue

2284

else:

2285

uid = 65534

2286

gid = 65534

1956

2287

try:

1957

2288

os.setgid(gid)

1958

2289

os.setuid(uid)

1959

2290

except OSError as error:

1960

if error[0] != errno.EPERM:

2291

if error.errno != errno.EPERM:

1961

2292

raise error

1962

2293

1963

if not debug and not debuglevel:

1964

syslogger.setLevel(logging.WARNING)

1965

console.setLevel(logging.WARNING)

1966

if debuglevel:

1967

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

1968

syslogger.setLevel(level)

1969

console.setLevel(level)

1970

1971

2294

if debug:

1972

2295

# Enable all possible GnuTLS debugging

1973

2296

1983

2306

.gnutls_global_set_log_function(debug_gnutls))

1984

2307

1985

2308

# Redirect stdin so all checkers get /dev/null

1986

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

2309

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

1987

2310

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

1988

2311

if null > 2:

1989

2312

os.close(null)

1990

else:

1991

# No console logging

1992

logger.removeHandler(console)

1993

2313

1994

2314

# Need to fork before connecting to D-Bus

1995

2315

if not debug:

1996

2316

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

1997

2317

daemon()

1998

2318

2319

gobject.threads_init()

2320

1999

2321

global main_loop

2000

2322

# From the Avahi example code

2001

DBusGMainLoop(set_as_default=True )

2323

DBusGMainLoop(set_as_default=True)

2002

2324

main_loop = gobject.MainLoop()

2003

2325

bus = dbus.SystemBus()

2004

2326

# End of Avahi example code

2010

2332

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

2011

2333

do_not_queue=True))

2012

2334

except dbus.exceptions.NameExistsException as e:

2013

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

2335

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

2014

2336

use_dbus = False

2015

2337

server_settings["use_dbus"] = False

2016

2338

tcp_server.use_dbus = False

2017

2339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2018

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

2019

servicetype = "_mandos._tcp",

2020

protocol = protocol, bus = bus)

2340

service = AvahiServiceToSyslog(name =

2341

server_settings["servicename"],

2342

servicetype = "_mandos._tcp",

2343

protocol = protocol, bus = bus)

2021

2344

if server_settings["interface"]:

2022

2345

service.interface = (if_nametoindex

2023

2346

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

2027

2350

2028

2351

client_class = Client

2029

2352

if use_dbus:

2030

client_class = functools.partial(ClientDBusTransitional,

2031

bus = bus)

2032

def client_config_items(config, section):

2033

special_settings = {

2034

"approved_by_default":

2035

lambda: config.getboolean(section,

2036

"approved_by_default"),

2037

}

2038

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

2353

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

2354

2355

client_settings = Client.config_parser(client_config)

2356

old_client_settings = {}

2357

clients_data = {}

2358

2359

# Get client data and settings from last running state.

2360

if server_settings["restore"]:

2361

try:

2362

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

2363

clients_data, old_client_settings = (pickle.load

2364

(stored_state))

2365

os.remove(stored_state_path)

2366

except IOError as e:

2367

if e.errno == errno.ENOENT:

2368

logger.warning("Could not load persistent state: {0}"

2369

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

2370

else:

2371

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

2372

exc_info=e)

2373

raise

2374

except EOFError as e:

2375

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

2376

"EOFError:", exc_info=e)

2377

2378

with PGPEngine() as pgp:

2379

for client_name, client in clients_data.iteritems():

2380

# Decide which value to use after restoring saved state.

2381

# We have three different values: Old config file,

2382

# new config file, and saved state.

2383

# New config value takes precedence if it differs from old

2384

# config value, otherwise use saved state.

2385

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

2386

try:

2387

# For each value in new config, check if it

2388

# differs from the old config value (Except for

2389

# the "secret" attribute)

2390

if (name != "secret" and

2391

value != old_client_settings[client_name]

2392

[name]):

2393

client[name] = value

2394

except KeyError:

2395

pass

2396

2397

# Clients who has passed its expire date can still be

2398

# enabled if its last checker was successful. Clients

2399

# whose checker succeeded before we stored its state is

2400

# assumed to have successfully run all checkers during

2401

# downtime.

2402

if client["enabled"]:

2403

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

2404

if not client["last_checked_ok"]:

2405

logger.warning(

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

2409

client["enabled"] = False

2410

elif client["last_checker_status"] != 0:

2411

logger.warning(

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

2416

client["enabled"] = False

2417

else:

2418

client["expires"] = (datetime.datetime

2419

.utcnow()

2420

+ client["timeout"])

2421

logger.debug("Last checker succeeded,"

2422

" keeping {0} enabled"

2423

.format(client_name))

2039

2424

try:

2040

yield (name, special_settings[name]())

2041

except KeyError:

2042

yield (name, value)

2043

2044

tcp_server.clients.update(set(

2045

client_class(name = section,

2046

config= dict(client_config_items(

2047

client_config, section)))

2048

for section in client_config.sections()))

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

2429

except PGPError:

2430

# If decryption fails, we use secret from new settings

2431

logger.debug("Failed to decrypt {0} old secret"

2432

.format(client_name))

2433

client["secret"] = (

2434

client_settings[client_name]["secret"])

2435

2436

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

2437

for client_name in (set(old_client_settings)

2438

- set(client_settings)):

2439

del clients_data[client_name]

2440

for client_name in (set(client_settings)

2441

- set(old_client_settings)):

2442

clients_data[client_name] = client_settings[client_name]

2443

2444

# Create all client objects

2445

for client_name, client in clients_data.iteritems():

2446

tcp_server.clients[client_name] = client_class(

2447

name = client_name, settings = client)

2448

2049

2449

if not tcp_server.clients:

2050

2450

logger.warning("No clients defined")

2051

2451

2052

2452

if not debug:

2053

2453

try:

2054

2454

with pidfile:

2062

2462

# "pidfile" was never created

2063

2463

pass

2064

2464

del pidfilename

2065

2066

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

2067

2465

2068

2466

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

2069

2467

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

2070

2468

2071

2469

if use_dbus:

2072

class MandosDBusService(dbus.service.Object):

2470

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

2471

"se.bsnet.fukt.Mandos"})

2472

class MandosDBusService(DBusObjectWithProperties):

2073

2473

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

2074

2474

def __init__(self):

2075

2475

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

2076

2476

_interface = "se.recompile.Mandos"

2077

2477

2478

@dbus_interface_annotations(_interface)

2479

def _foo(self):

2480

return { "org.freedesktop.DBus.Property"

2481

".EmitsChangedSignal":

2482

"false"}

2483

2078

2484

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

2079

2485

def ClientAdded(self, objpath):

2080

2486

"D-Bus signal"

2094

2500

def GetAllClients(self):

2095

2501

"D-Bus method"

2096

2502

return dbus.Array(c.dbus_object_path

2097

for c in tcp_server.clients)

2503

for c in

2504

tcp_server.clients.itervalues())

2098

2505

2099

2506

@dbus.service.method(_interface,

2100

2507

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

2102

2509

"D-Bus method"

2103

2510

return dbus.Dictionary(

2104

2511

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

2105

for c in tcp_server.clients),

2512

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

2106

2513

signature="oa{sv}")

2107

2514

2108

2515

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

2109

2516

def RemoveClient(self, object_path):

2110

2517

"D-Bus method"

2111

for c in tcp_server.clients:

2518

for c in tcp_server.clients.itervalues():

2112

2519

if c.dbus_object_path == object_path:

2113

tcp_server.clients.remove(c)

2520

del tcp_server.clients[c.name]

2114

2521

c.remove_from_connection()

2115

2522

# Don't signal anything except ClientRemoved

2116

2523

c.disable(quiet=True)

2121

2528

2122

2529

del _interface

2123

2530

2124

class MandosDBusServiceTransitional(MandosDBusService):

2125

__metaclass__ = AlternateDBusNamesMetaclass

2126

mandos_dbus_service = MandosDBusServiceTransitional()

2531

mandos_dbus_service = MandosDBusService()

2127

2532

2128

2533

def cleanup():

2129

2534

"Cleanup function; run on exit"

2130

2535

service.cleanup()

2131

2536

2537

multiprocessing.active_children()

2538

if not (tcp_server.clients or client_settings):

2539

return

2540

2541

# Store client before exiting. Secrets are encrypted with key

2542

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

2543

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

2544

clients = {}

2545

with PGPEngine() as pgp:

2546

for client in tcp_server.clients.itervalues():

2547

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

2548

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

2549

key)

2550

client_dict = {}

2551

2552

# A list of attributes that can not be pickled

2553

# + secret.

2554

exclude = set(("bus", "changedstate", "secret",

2555

"checker"))

2556

for name, typ in (inspect.getmembers

2557

(dbus.service.Object)):

2558

exclude.add(name)

2559

2560

client_dict["encrypted_secret"] = (client

2561

.encrypted_secret)

2562

for attr in client.client_structure:

2563

if attr not in exclude:

2564

client_dict[attr] = getattr(client, attr)

2565

2566

clients[client.name] = client_dict

2567

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

2568

2569

try:

2570

with (tempfile.NamedTemporaryFile

2571

(mode='wb', suffix=".pickle", prefix='clients-',

2572

dir=os.path.dirname(stored_state_path),

2573

delete=False)) as stored_state:

2574

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

2575

tempname=stored_state.name

2576

os.rename(tempname, stored_state_path)

2577

except (IOError, OSError) as e:

2578

if not debug:

2579

try:

2580

os.remove(tempname)

2581

except NameError:

2582

pass

2583

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

2584

logger.warning("Could not save persistent state: {0}"

2585

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

2586

else:

2587

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

2588

exc_info=e)

2589

raise e

2590

2591

# Delete all clients, and settings from config

2132

2592

while tcp_server.clients:

2133

client = tcp_server.clients.pop()

2593

name, client = tcp_server.clients.popitem()

2134

2594

if use_dbus:

2135

2595

client.remove_from_connection()

2136

client.disable_hook = None

2137

2596

# Don't signal anything except ClientRemoved

2138

2597

client.disable(quiet=True)

2139

2598

if use_dbus:

2141

2600

mandos_dbus_service.ClientRemoved(client

2142

2601

.dbus_object_path,

2143

2602

client.name)

2603

client_settings.clear()

2144

2604

2145

2605

atexit.register(cleanup)

2146

2606

2147

for client in tcp_server.clients:

2607

for client in tcp_server.clients.itervalues():

2148

2608

if use_dbus:

2149

2609

# Emit D-Bus signal

2150

2610

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2151

client.enable()

2611

# Need to initiate checking of clients

2612

if client.enabled:

2613

client.init_checker()

2152

2614

2153

2615

tcp_server.enable()

2154

2616

tcp_server.server_activate()

2157

2619

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

2158

2620

if use_ipv6:

2159

2621

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

2160

" flowinfo %d, scope_id %d"

2161

% tcp_server.socket.getsockname())

2622

" flowinfo %d, scope_id %d",

2623

*tcp_server.socket.getsockname())

2162

2624

else: # IPv4

2163

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

2164

% tcp_server.socket.getsockname())

2625

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

2626

*tcp_server.socket.getsockname())

2165

2627

2166

2628

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

2167

2629

2170

2632

try:

2171

2633

service.activate()

2172

2634

except dbus.exceptions.DBusException as error:

2173

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

2635

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

2174

2636

cleanup()

2175

2637

sys.exit(1)

2176

2638

# End of Avahi example code

2183

2645

logger.debug("Starting main loop")

2184

2646

main_loop.run()

2185

2647

except AvahiError as error:

2186

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

2648

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

2187

2649

cleanup()

2188

2650

sys.exit(1)

2189

2651

except KeyboardInterrupt:

2194

2656

# Must run before the D-Bus bus name gets deregistered

2195

2657

cleanup()

2196

2658

2197

2198

2659

if __name__ == '__main__':

2199

2660

main()