/mandos/release : revision 237.7.174

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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 types

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import binascii

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import tempfile

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import itertools

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import collections

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import 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 = "1.4.1"

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version = "1.6.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def initlogger(level=logging.WARNING):

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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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' %(message)s'))

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logger.addHandler(syslogger)

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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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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 CryptoError(Exception):

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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 Crypto(object):

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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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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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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) 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 CryptoError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) 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 CryptoError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self, 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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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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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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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)

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

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

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

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% self.name))

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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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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_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, or None.

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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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server_settings: The server_settings dict from main()

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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": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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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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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, 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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@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,

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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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

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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, server_settings=None):

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self.name = name

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if config is None:

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config = {}

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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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"):

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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

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

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if "secret" in config:

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

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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", "")

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self.created = datetime.datetime.utcnow()

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self.enabled = config.get("enabled", True)

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self.last_approval_request = None

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if self.enabled:

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self.last_enabled = datetime.datetime.utcnow()

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else:

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self.last_enabled = None

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self.last_checked_ok = None

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self.last_checker_status = 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.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

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if self.enabled:

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

493

else:

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self.expires = None

495

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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

500

True)

501

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self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

508

561

.Lock()))

528

581

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

529

582

# Already enabled

530

583

return

531

self.send_changedstate()

532

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

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self.enabled = True

534

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

588

self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

541

594

if not quiet:

542

self.send_changedstate()

543

if not quiet:

544

595

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

545

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

596

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

600

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

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601

gobject.source_remove(self.checker_initiator_tag)

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602

self.checker_initiator_tag = None

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603

self.stop_checker()

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604

self.enabled = False

605

if not quiet:

606

self.send_changedstate()

554

607

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

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return False

556

609

560

613

def init_checker(self):

561

614

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

562

615

# and every interval from then on.

616

if self.checker_initiator_tag is not None:

617

gobject.source_remove(self.checker_initiator_tag)

563

618

self.checker_initiator_tag = (gobject.timeout_add

564

619

(self.interval_milliseconds(),

565

620

self.start_checker))

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

622

if self.disable_initiator_tag is not None:

623

gobject.source_remove(self.disable_initiator_tag)

567

624

self.disable_initiator_tag = (gobject.timeout_add

568

625

(self.timeout_milliseconds(),

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626

self.disable))

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self.checker_callback_tag = None

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633

self.checker = None

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634

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

635

self.last_checker_status = os.WEXITSTATUS(condition)

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if self.last_checker_status == 0:

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

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638

vars(self))

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

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vars(self))

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def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

648

def checked_ok(self):

649

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

650

self.last_checked_ok = datetime.datetime.utcnow()

651

self.last_checker_status = 0

652

self.bump_timeout()

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654

def bump_timeout(self, timeout=None):

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

597

656

if timeout is None:

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timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

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if self.disable_initiator_tag is not None:

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659

gobject.source_remove(self.disable_initiator_tag)

660

self.disable_initiator_tag = None

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

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662

self.disable_initiator_tag = (gobject.timeout_add

604

663

(timedelta_to_milliseconds

614

673

If a checker already exists, leave it running and do

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674

nothing."""

616

675

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

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

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

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

678

# would inevitably timeout, since no checker would get a

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

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

622

681

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

623

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# should be.

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696

self.current_checker_command)

638

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# Start a new checker if needed

639

698

if self.checker is None:

699

# Escape attributes for the shell

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

640

704

try:

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

705

command = self.checker_command % escaped_attrs

706

except TypeError as error:

707

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

708

self.checker_command, exc_info=error)

709

return True # Try again later

659

710

self.current_checker_command = command

660

711

try:

661

712

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

664

715

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

665

716

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

666

717

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

667

726

self.checker = subprocess.Popen(command,

668

727

close_fds=True,

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

676

741

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

680

742

except OSError as error:

681

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

682

error)

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

683

752

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

684

753

return True

685

754

692

761

return

693

762

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

694

763

try:

695

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

764

self.checker.terminate()

696

765

#time.sleep(0.5)

697

766

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

698

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

767

# self.checker.kill()

699

768

except OSError as error:

700

769

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

701

770

raise

718

787

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

719

788

if byte_arrays and signature != "ay":

720

789

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

721

" signature %r" % signature)

790

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

722

791

def decorator(func):

723

792

func._dbus_is_property = True

724

793

func._dbus_interface = dbus_interface

732

801

return decorator

733

802

734

803

804

def dbus_interface_annotations(dbus_interface):

805

"""Decorator for marking functions returning interface annotations

806

807

Usage:

808

809

@dbus_interface_annotations("org.example.Interface")

810

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

811

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

812

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

813

"false"}

814

"""

815

def decorator(func):

816

func._dbus_is_interface = True

817

func._dbus_interface = dbus_interface

818

func._dbus_name = dbus_interface

819

return func

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

return decorator

839

840

735

841

class DBusPropertyException(dbus.exceptions.DBusException):

736

842

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

737

843

"""

760

866

"""

761

867

762

868

@staticmethod

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

765

877

766

def _get_all_dbus_properties(self):

878

def _get_all_dbus_things(self, thing):

767

879

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

768

880

"""

769

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

881

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

882

name),

883

athing.__get__(self))

770

884

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

885

for name, athing in

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

773

888

774

889

def _get_dbus_property(self, interface_name, property_name):

775

890

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

777

892

"""

778

893

for cls in self.__class__.__mro__:

779

894

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

895

(cls,

896

self._is_dbus_thing("property"))):

781

897

if (value._dbus_name == property_name

782

898

and value._dbus_interface == interface_name):

783

899

return value.__get__(self)

812

928

# signatures other than "ay".

813

929

if prop._dbus_signature != "ay":

814

930

raise ValueError

815

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

816

for byte in value))

931

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

932

for byte in value))

817

933

prop(value)

818

934

819

935

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

825

941

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

826

942

"""

827

943

properties = {}

828

for name, prop in self._get_all_dbus_properties():

944

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

829

945

if (interface_name

830

946

and interface_name != prop._dbus_interface):

831

947

# Interface non-empty but did not match

846

962

path_keyword='object_path',

847

963

connection_keyword='connection')

848

964

def Introspect(self, object_path, connection):

849

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

965

"""Overloading of standard D-Bus method.

966

967

Inserts property tags and interface annotation tags.

850

968

"""

851

969

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

852

970

connection)

859

977

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

860

978

return e

861

979

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

980

# Add property tags

862

981

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

863

982

for name, prop

864

in self._get_all_dbus_properties()

983

in self._get_all_dbus_things("property")

865

984

if prop._dbus_interface

866

985

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

867

986

if_tag.appendChild(tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

868

1018

# Add the names to the return values for the

869

1019

# "org.freedesktop.DBus.Properties" methods

870

1020

if (if_tag.getAttribute("name")

885

1035

except (AttributeError, xml.dom.DOMException,

886

1036

xml.parsers.expat.ExpatError) as error:

887

1037

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

888

error)

1038

exc_info=error)

889

1039

return xmlstring

890

1040

891

1041

892

def datetime_to_dbus (dt, variant_level=0):

1042

def datetime_to_dbus(dt, variant_level=0):

893

1043

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

894

1044

if dt is None:

895

1045

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

897

1047

variant_level=variant_level)

898

1048

899

1049

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1051

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

1052

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

1053

interface names according to the "alt_interface_names" mapping.

1054

Usage:

1055

1056

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

1057

"net.example.AlternateInterface"})

1058

class SampleDBusObject(dbus.service.Object):

1059

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

1060

def SampleDBusMethod():

1061

pass

1062

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1064

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

1065

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

1066

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

1067

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

1068

1069

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

1070

(from DBusObjectWithProperties) and interfaces (from the

1071

dbus_interface_annotations decorator).

904

1072

"""

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1073

def wrapper(cls):

1074

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1076

attr = {}

1077

interface_names = set()

1078

# Go though all attributes of the class

1079

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

912

1080

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

913

1081

# with the wrong interface name

914

1082

if (not hasattr(attribute, "_dbus_interface")

915

1083

or not attribute._dbus_interface

916

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

1084

.startswith(orig_interface_name)):

917

1085

continue

918

1086

# Create an alternate D-Bus interface name based on

919

1087

# the current name

920

1088

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1091

interface_names.add(alt_interface)

923

1092

# Is this a D-Bus signal?

924

1093

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

925

# Extract the original non-method function by

926

# black magic

1094

# Extract the original non-method undecorated

1095

# function by black magic

927

1096

nonmethod_func = (dict(

928

1097

zip(attribute.func_code.co_freevars,

929

1098

attribute.__closure__))["func"]

940

1109

nonmethod_func.func_name,

941

1110

nonmethod_func.func_defaults,

942

1111

nonmethod_func.func_closure)))

1112

# Copy annotations, if any

1113

try:

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1116

except AttributeError:

1117

pass

943

1118

# Define a creator of a function to call both the

944

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

945

# signals gets sent when the function is called

1119

# original and alternate functions, so both the

1120

# original and alternate signals gets sent when

1121

# the function is called

946

1122

def fixscope(func1, func2):

947

1123

"""This function is a scope container to pass

948

1124

func1 and func2 to the "call_both" function

955

1131

return call_both

956

1132

# Create the "call_both" function and add it to

957

1133

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

1134

attr[attrname] = fixscope(attribute, new_function)

960

1135

# Is this a D-Bus method?

961

1136

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

962

1137

# Create a new, but exactly alike, function

973

1148

attribute.func_name,

974

1149

attribute.func_defaults,

975

1150

attribute.func_closure)))

1151

# Copy annotations, if any

1152

try:

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1155

except AttributeError:

1156

pass

976

1157

# Is this a D-Bus property?

977

1158

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

978

1159

# Create a new, but exactly alike, function

992

1173

attribute.func_name,

993

1174

attribute.func_defaults,

994

1175

attribute.func_closure)))

995

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

996

997

1176

# Copy annotations, if any

1177

try:

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1180

except AttributeError:

1181

pass

1182

# Is this a D-Bus interface?

1183

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

1184

# Create a new, but exactly alike, function

1185

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

1186

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

1187

# to the class.

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1196

if deprecate:

1197

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1199

for interface_name in interface_names:

1200

@dbus_interface_annotations(interface_name)

1201

def func(self):

1202

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

1203

"true" }

1204

# Find an unused name

1205

for aname in (iname.format(i)

1206

for i in itertools.count()):

1207

if aname not in attr:

1208

attr[aname] = func

1209

break

1210

if interface_names:

1211

# Replace the class with a new subclass of it with

1212

# methods, signals, etc. as created above.

1213

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

1214

(cls,), attr)

1215

return cls

1216

return wrapper

1217

1218

1219

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

1220

"se.bsnet.fukt.Mandos"})

998

1221

class ClientDBus(Client, DBusObjectWithProperties):

999

1222

"""A Client class using D-Bus

1000

1223

1011

1234

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

1012

1235

self.bus = bus

1013

1236

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

1014

1015

self._approvals_pending = 0

1016

1237

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

1017

1238

# the D-Bus

1018

1239

client_object_name = unicode(self.name).translate(

1022

1243

("/clients/" + client_object_name))

1023

1244

DBusObjectWithProperties.__init__(self, self.bus,

1024

1245

self.dbus_object_path)

1025

1246

1026

1247

def notifychangeproperty(transform_func,

1027

1248

dbus_name, type_func=lambda x: x,

1028

1249

variant_level=1):

1051

1272

1052

1273

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

1053

1274

1054

1055

1275

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

1276

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

1277

"ApprovalPending",

1064

1284

checker is not None)

1065

1285

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

1286

"LastCheckedOK")

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1288

"LastCheckerStatus")

1067

1289

last_approval_request = notifychangeproperty(

1068

1290

datetime_to_dbus, "LastApprovalRequest")

1069

1291

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

1292

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1072

1294

"ApprovalDelay",

1073

1295

type_func =

1074

1296

timedelta_to_milliseconds)

1075

1297

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1298

dbus.UInt64, "ApprovalDuration",

1077

1299

type_func = timedelta_to_milliseconds)

1078

1300

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

1079

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

1301

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

1080

1302

type_func =

1081

1303

timedelta_to_milliseconds)

1082

1304

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1305

dbus.UInt64, "ExtendedTimeout",

1084

1306

type_func = timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1307

interval = notifychangeproperty(dbus.UInt64,

1086

1308

"Interval",

1087

1309

type_func =

1088

1310

timedelta_to_milliseconds)

1137

1359

return False

1138

1360

1139

1361

def approve(self, value=True):

1140

self.send_changedstate()

1141

1362

self.approved = value

1142

1363

gobject.timeout_add(timedelta_to_milliseconds

1143

1364

(self.approval_duration),

1144

1365

self._reset_approved)

1145

1366

self.send_changedstate()

1146

1367

1147

1368

## D-Bus methods, signals & properties

1148

1369

_interface = "se.recompile.Mandos.Client"

1149

1370

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1150

1378

## Signals

1151

1379

1152

1380

# CheckerCompleted - signal

1188

1416

"D-Bus signal"

1189

1417

return self.need_approval()

1190

1418

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1199

1419

## Methods

1200

1420

1201

1421

# Approve - method

1279

1499

def Host_dbus_property(self, value=None):

1280

1500

if value is None: # get

1281

1501

return dbus.String(self.host)

1282

self.host = value

1502

self.host = unicode(value)

1283

1503

1284

1504

# Created - property

1285

1505

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

1311

1531

return

1312

1532

return datetime_to_dbus(self.last_checked_ok)

1313

1533

1534

# LastCheckerStatus - property

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

1537

def LastCheckerStatus_dbus_property(self):

1538

return dbus.Int16(self.last_checker_status)

1539

1314

1540

# Expires - property

1315

1541

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

1316

1542

def Expires_dbus_property(self):

1327

1553

def Timeout_dbus_property(self, value=None):

1328

1554

if value is None: # get

1329

1555

return dbus.UInt64(self.timeout_milliseconds())

1556

old_timeout = self.timeout

1330

1557

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

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1558

# Reschedule disabling

1559

if self.enabled:

1560

now = datetime.datetime.utcnow()

1561

self.expires += self.timeout - old_timeout

1562

if self.expires <= now:

1563

# The timeout has passed

1564

self.disable()

1565

else:

1566

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

1567

is None):

1568

return

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1351

1574

1352

1575

# ExtendedTimeout - property

1353

1576

@dbus_service_property(_interface, signature="t",

1379

1602

def Checker_dbus_property(self, value=None):

1380

1603

if value is None: # get

1381

1604

return dbus.String(self.checker_command)

1382

self.checker_command = value

1605

self.checker_command = unicode(value)

1383

1606

1384

1607

# CheckerRunning - property

1385

1608

@dbus_service_property(_interface, signature="b",

1432

1655

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

1433

1656

1434

1657

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1439

1658

class ClientHandler(socketserver.BaseRequestHandler, object):

1440

1659

"""A class to handle client connections.

1441

1660

1509

1728

except KeyError:

1510

1729

return

1511

1730

1512

if self.server.use_dbus:

1513

# Emit D-Bus signal

1514

client.NewRequest(str(self.client_address))

1515

1516

1731

if client.approval_delay:

1517

1732

delay = client.approval_delay

1518

1733

client.approvals_pending += 1

1549

1764

#wait until timeout or approved

1550

1765

time = datetime.datetime.now()

1551

1766

client.changedstate.acquire()

1552

(client.changedstate.wait

1553

(float(client.timedelta_to_milliseconds(delay)

1554

/ 1000)))

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1555

1770

client.changedstate.release()

1556

1771

time2 = datetime.datetime.now()

1557

1772

if (time2 - time) >= delay:

1573

1788

try:

1574

1789

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

1575

1790

except gnutls.errors.GNUTLSError as error:

1576

logger.warning("gnutls send failed")

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1577

1793

return

1578

1794

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

1579

1795

sent, len(client.secret)

1582

1798

1583

1799

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

1584

1800

# bump the timeout using extended_timeout

1585

client.checked_ok(client.extended_timeout)

1801

client.bump_timeout(client.extended_timeout)

1586

1802

if self.server.use_dbus:

1587

1803

# Emit D-Bus signal

1588

1804

client.GotSecret()

1593

1809

try:

1594

1810

session.bye()

1595

1811

except gnutls.errors.GNUTLSError as error:

1596

logger.warning("GnuTLS bye failed")

1812

logger.warning("GnuTLS bye failed",

1813

exc_info=error)

1597

1814

1598

1815

@staticmethod

1599

1816

def peer_certificate(session):

1664

1881

def sub_process_main(self, request, address):

1665

1882

try:

1666

1883

self.finish_request(request, address)

1667

except:

1884

except Exception:

1668

1885

self.handle_error(request, address)

1669

1886

self.close_request(request)

1670

1887

1671

1888

def process_request(self, request, address):

1672

1889

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

1673

1890

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

1674

args = (request,

1675

address))

1891

args = (request, address))

1676

1892

proc.start()

1677

1893

return proc

1678

1894

1706

1922

use_ipv6: Boolean; to use IPv6 or not

1707

1923

"""

1708

1924

def __init__(self, server_address, RequestHandlerClass,

1709

interface=None, use_ipv6=True):

1925

interface=None, use_ipv6=True, socketfd=None):

1926

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

1927

creating a new one with socket.socket().

1928

"""

1710

1929

self.interface = interface

1711

1930

if use_ipv6:

1712

1931

self.address_family = socket.AF_INET6

1932

if socketfd is not None:

1933

# Save the file descriptor

1934

self.socketfd = socketfd

1935

# Save the original socket.socket() function

1936

self.socket_socket = socket.socket

1937

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

1938

#

1939

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

1940

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

1941

# patching socket.socket.)

1942

#

1943

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

1944

@functools.wraps(socket.socket)

1945

def socket_wrapper(*args, **kwargs):

1946

# Restore original function so subsequent calls are

1947

# not affected.

1948

socket.socket = self.socket_socket

1949

del self.socket_socket

1950

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

1951

# saved file descriptor.

1952

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

1953

# Replace socket.socket() function with wrapper

1954

socket.socket = socket_wrapper

1955

# The socketserver.TCPServer.__init__ will call

1956

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

1957

# socket_wrapper(), if socketfd was set.

1713

1958

socketserver.TCPServer.__init__(self, server_address,

1714

1959

RequestHandlerClass)

1960

1715

1961

def server_bind(self):

1716

1962

"""This overrides the normal server_bind() function

1717

1963

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

1725

1971

try:

1726

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1727

1973

SO_BINDTODEVICE,

1728

str(self.interface

1729

+ '\0'))

1974

str(self.interface + '\0'))

1730

1975

except socket.error as error:

1731

if error[0] == errno.EPERM:

1732

logger.error("No permission to"

1733

" bind to interface %s",

1734

self.interface)

1735

elif error[0] == errno.ENOPROTOOPT:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1736

1980

logger.error("SO_BINDTODEVICE not available;"

1737

1981

" cannot bind to interface %s",

1738

1982

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1739

1986

else:

1740

1987

raise

1741

1988

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

1744

1991

if self.address_family == socket.AF_INET6:

1745

1992

any_address = "::" # in6addr_any

1746

1993

else:

1747

any_address = socket.INADDR_ANY

1994

any_address = "0.0.0.0" # INADDR_ANY

1748

1995

self.server_address = (any_address,

1749

1996

self.server_address[1])

1750

1997

elif not self.server_address[1]:

1771

2018

"""

1772

2019

def __init__(self, server_address, RequestHandlerClass,

1773

2020

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

1774

gnutls_priority=None, use_dbus=True):

2021

gnutls_priority=None, use_dbus=True, socketfd=None):

1775

2022

self.enabled = False

1776

2023

self.clients = clients

1777

2024

if self.clients is None:

1781

2028

IPv6_TCPServer.__init__(self, server_address,

1782

2029

RequestHandlerClass,

1783

2030

interface = interface,

1784

use_ipv6 = use_ipv6)

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

1785

2033

def server_activate(self):

1786

2034

if self.enabled:

1787

2035

return socketserver.TCPServer.server_activate(self)

1800

2048

1801

2049

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

1802

2050

proc = None, client_object=None):

1803

condition_names = {

1804

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

1805

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

1806

# blocking).

1807

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

1808

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

1809

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

1810

# broken, usually for pipes and

1811

# sockets).

1812

}

1813

conditions_string = ' | '.join(name

1814

for cond, name in

1815

condition_names.iteritems()

1816

if cond & condition)

1817

2051

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

1818

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

2052

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

1819

2053

# Wait for other process to exit

1820

2054

proc.join()

1821

2055

return False

1879

2113

return True

1880

2114

1881

2115

2116

def rfc3339_duration_to_delta(duration):

2117

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

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

datetime.timedelta(1, 200)

2133

"""

2134

2135

# Parsing an RFC 3339 duration with regular expressions is not

2136

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

2137

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

2138

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

2139

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

2140

# avoid excessive use of external libraries.

2141

2142

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

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2152

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

2153

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

2154

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

2155

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

2156

datetime.timedelta(seconds=1),

2157

frozenset((token_end,)))

2158

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

2159

datetime.timedelta(minutes=1),

2160

frozenset((token_second, token_end)))

2161

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

2162

datetime.timedelta(hours=1),

2163

frozenset((token_minute, token_end)))

2164

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

2165

None,

2166

frozenset((token_hour, token_minute,

2167

token_second)))

2168

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

2169

datetime.timedelta(days=1),

2170

frozenset((token_time, token_end)))

2171

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

2172

datetime.timedelta(weeks=4),

2173

frozenset((token_day, token_end)))

2174

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

2175

datetime.timedelta(weeks=52),

2176

frozenset((token_month, token_end)))

2177

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

2178

datetime.timedelta(weeks=1),

2179

frozenset((token_end,)))

2180

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

2181

frozenset((token_year, token_month,

2182

token_day, token_time,

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2186

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2189

# Loop until end token is found

2190

while found_token is not token_end:

2191

# Search for any currently valid tokens

2192

for token in followers:

2193

match = token.regexp.match(s)

2194

if match is not None:

2195

# Token found

2196

if token.value is not None:

2197

# Value found, parse digits

2198

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

2199

# Add to value so far

2200

value += factor * token.value

2201

# Strip token from string

2202

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

2203

# Go to found token

2204

found_token = token

2205

# Set valid next tokens

2206

followers = found_token.followers

2207

break

2208

else:

2209

# No currently valid tokens were found

2210

raise ValueError("Invalid RFC 3339 duration")

2211

# End token found

2212

return value

2213

2214

1882

2215

def string_to_delta(interval):

1883

2216

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

1884

2217

1895

2228

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

1896

2229

datetime.timedelta(0, 330)

1897

2230

"""

2231

2232

try:

2233

return rfc3339_duration_to_delta(interval)

2234

except ValueError:

2235

pass

2236

1898

2237

timevalue = datetime.timedelta(0)

1899

2238

for s in interval.split():

1900

2239

try:

1911

2250

elif suffix == "w":

1912

2251

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

1913

2252

else:

1914

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

2253

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

2254

.format(suffix))

1915

2255

except (ValueError, IndexError) as e:

1916

2256

raise ValueError(*(e.args))

1917

2257

timevalue += delta

1931

2271

sys.exit()

1932

2272

if not noclose:

1933

2273

# Close all standard open file descriptors

1934

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

2274

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

1935

2275

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

1936

2276

raise OSError(errno.ENODEV,

1937

"%s not a character device"

1938

% os.path.devnull)

2277

"{0} not a character device"

2278

.format(os.devnull))

1939

2279

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

1940

2280

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

1941

2281

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

1950

2290

1951

2291

parser = argparse.ArgumentParser()

1952

2292

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

1953

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

2293

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

1954

2294

help="show version number and exit")

1955

2295

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

1956

2296

help="Bind to interface IF")

1962

2302

help="Run self-test")

1963

2303

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

1964

2304

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

1965

" to terminal")

2305

" to terminal", default=None)

1966

2306

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

1967

2307

help="Debug level for stdout output")

1968

2308

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

1975

2315

" files")

1976

2316

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

1977

2317

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

1978

" system bus interface")

2318

" system bus interface", default=None)

1979

2319

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

1980

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

2320

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

2321

default=None)

1981

2322

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

1982

2323

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

1983

" state")

2324

" state", default=None)

2325

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

2326

help="Specify a file descriptor to a network"

2327

" socket to use instead of creating one")

1984

2328

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

1985

2329

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

2330

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

2331

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

1986

2332

1987

2333

options = parser.parse_args()

1988

2334

1997

2343

"port": "",

1998

2344

"debug": "False",

1999

2345

"priority":

2000

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

2346

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",

2001

2347

"servicename": "Mandos",

2002

2348

"use_dbus": "True",

2003

2349

"use_ipv6": "True",

2004

2350

"debuglevel": "",

2005

2351

"restore": "True",

2006

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

2352

"socket": "",

2353

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

2354

"foreground": "False",

2007

2355

}

2008

2356

2009

2357

# Parse config file for server-global settings

2014

2362

# Convert the SafeConfigParser object to a dict

2015

2363

server_settings = server_config.defaults()

2016

2364

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

2017

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

2365

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

2018

2366

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

2019

2367

option)

2020

2368

if server_settings["port"]:

2021

2369

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

2022

2370

"port")

2371

if server_settings["socket"]:

2372

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

2373

"socket")

2374

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

2375

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

2376

# happen with a supplied network socket.

2377

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

2378

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

2379

["socket"])

2023

2380

del server_config

2024

2381

2025

2382

# Override the settings from the config file with command line

2027

2384

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

2028

2385

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

2029

2386

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

2030

"statedir"):

2387

"statedir", "socket", "foreground"):

2031

2388

value = getattr(options, option)

2032

2389

if value is not None:

2033

2390

server_settings[option] = value

2036

2393

for option in server_settings.keys():

2037

2394

if type(server_settings[option]) is str:

2038

2395

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

2396

# Force all boolean options to be boolean

2397

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

2398

"foreground"):

2399

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

2400

# Debug implies foreground

2401

if server_settings["debug"]:

2402

server_settings["foreground"] = True

2039

2403

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

2040

2404

2041

2405

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

2047

2411

use_ipv6 = server_settings["use_ipv6"]

2048

2412

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

2049

2413

stored_state_file)

2414

foreground = server_settings["foreground"]

2050

2415

2051

2416

if debug:

2052

initlogger(logging.DEBUG)

2417

initlogger(debug, logging.DEBUG)

2053

2418

else:

2054

2419

if not debuglevel:

2055

initlogger()

2420

initlogger(debug)

2056

2421

else:

2057

2422

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

2058

initlogger(level)

2423

initlogger(debug, level)

2059

2424

2060

2425

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

2061

2426

syslogger.setFormatter(logging.Formatter

2062

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

2063

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

2064

% server_settings["servicename"]))

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2065

2431

2066

2432

# Parse config file with clients

2067

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

2068

"extended_timeout": "15m",

2069

"interval": "2m",

2070

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

2071

"host": "",

2072

"approval_delay": "0s",

2073

"approval_duration": "1s",

2074

}

2075

client_config = configparser.SafeConfigParser(client_defaults)

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

2076

2435

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

2077

2436

"clients.conf"))

2078

2437

2087

2446

use_ipv6=use_ipv6,

2088

2447

gnutls_priority=

2089

2448

server_settings["priority"],

2090

use_dbus=use_dbus)

2091

if not debug:

2092

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

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2452

if not foreground:

2453

pidfilename = "/run/mandos.pid"

2454

pidfile = None

2093

2455

try:

2094

2456

pidfile = open(pidfilename, "w")

2095

except IOError:

2096

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

2457

except IOError as e:

2458

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

2459

exc_info=e)

2097

2460

2098

try:

2099

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

2100

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

2101

except KeyError:

2461

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

2102

2462

try:

2103

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

2104

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

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2105

2466

except KeyError:

2106

try:

2107

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

2108

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

2109

except KeyError:

2110

uid = 65534

2111

gid = 65534

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2112

2471

try:

2113

2472

os.setgid(gid)

2114

2473

os.setuid(uid)

2115

2474

except OSError as error:

2116

if error[0] != errno.EPERM:

2475

if error.errno != errno.EPERM:

2117

2476

raise error

2118

2477

2119

2478

if debug:

2131

2490

.gnutls_global_set_log_function(debug_gnutls))

2132

2491

2133

2492

# Redirect stdin so all checkers get /dev/null

2134

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

2493

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

2135

2494

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

2136

2495

if null > 2:

2137

2496

os.close(null)

2138

else:

2139

# No console logging

2140

logger.removeHandler(console)

2141

2497

2142

2498

# Need to fork before connecting to D-Bus

2143

if not debug:

2499

if not foreground:

2144

2500

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

2145

2501

daemon()

2146

2502

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

2147

2507

global main_loop

2148

2508

# From the Avahi example code

2149

DBusGMainLoop(set_as_default=True )

2509

DBusGMainLoop(set_as_default=True)

2150

2510

main_loop = gobject.MainLoop()

2151

2511

bus = dbus.SystemBus()

2152

2512

# End of Avahi example code

2158

2518

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

2159

2519

do_not_queue=True))

2160

2520

except dbus.exceptions.NameExistsException as e:

2161

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

2521

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

2162

2522

use_dbus = False

2163

2523

server_settings["use_dbus"] = False

2164

2524

tcp_server.use_dbus = False

2176

2536

2177

2537

client_class = Client

2178

2538

if use_dbus:

2179

client_class = functools.partial(ClientDBusTransitional,

2180

bus = bus)

2181

2182

special_settings = {

2183

# Some settings need to be accessd by special methods;

2184

# booleans need .getboolean(), etc. Here is a list of them:

2185

"approved_by_default":

2186

lambda section:

2187

client_config.getboolean(section, "approved_by_default"),

2188

"enabled":

2189

lambda section:

2190

client_config.getboolean(section, "enabled"),

2191

}

2192

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

2193

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

2194

# with exceptions for any special settings as defined above

2195

client_settings = dict((clientname,

2196

dict((setting,

2197

(value

2198

if setting not in special_settings

2199

else special_settings[setting]

2200

(clientname)))

2201

for setting, value in

2202

client_config.items(clientname)))

2203

for clientname in client_config.sections())

2204

2539

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

2540

2541

client_settings = Client.config_parser(client_config)

2205

2542

old_client_settings = {}

2206

clients_data = []

2543

clients_data = {}

2544

2545

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

2546

global wnull

2547

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

2548

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

2549

# mode

2550

if debug or not foreground:

2551

wnull.close()

2207

2552

2208

2553

# Get client data and settings from last running state.

2209

2554

if server_settings["restore"]:

2213

2558

(stored_state))

2214

2559

os.remove(stored_state_path)

2215

2560

except IOError as e:

2216

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

2217

.format(e))

2218

if e.errno != errno.ENOENT:

2561

if e.errno == errno.ENOENT:

2562

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

2563

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

2564

else:

2565

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

2566

exc_info=e)

2219

2567

raise

2568

except EOFError as e:

2569

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

2570

"EOFError:", exc_info=e)

2220

2571

2221

with Crypto() as crypt:

2222

for client in clients_data:

2223

client_name = client["name"]

2572

with PGPEngine() as pgp:

2573

for client_name, client in clients_data.iteritems():

2574

# Skip removed clients

2575

if client_name not in client_settings:

2576

continue

2224

2577

2225

2578

# Decide which value to use after restoring saved state.

2226

2579

# We have three different values: Old config file,

2235

2588

if (name != "secret" and

2236

2589

value != old_client_settings[client_name]

2237

2590

[name]):

2238

setattr(client, name, value)

2591

client[name] = value

2239

2592

except KeyError:

2240

2593

pass

2241

2594

2242

2595

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was sucessful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"] and client["last_checked_ok"]:

2247

if ((datetime.datetime.utcnow()

2248

- client["last_checked_ok"])

2249

> client["interval"]):

2250

if client["last_checker_status"] != 0:

2596

# enabled if its last checker was successful. Clients

2597

# whose checker succeeded before we stored its state is

2598

# assumed to have successfully run all checkers during

2599

# downtime.

2600

if client["enabled"]:

2601

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

2602

if not client["last_checked_ok"]:

2603

logger.warning(

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

2607

client["enabled"] = False

2608

elif client["last_checker_status"] != 0:

2609

logger.warning(

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

2251

2614

client["enabled"] = False

2252

2615

else:

2253

2616

client["expires"] = (datetime.datetime

2254

2617

.utcnow()

2255

2618

+ client["timeout"])

2256

2257

client["changedstate"] = (multiprocessing_manager

2258

.Condition

2259

(multiprocessing_manager

2260

.Lock()))

2261

if use_dbus:

2262

new_client = (ClientDBusTransitional.__new__

2263

(ClientDBusTransitional))

2264

tcp_server.clients[client_name] = new_client

2265

new_client.bus = bus

2266

for name, value in client.iteritems():

2267

setattr(new_client, name, value)

2268

client_object_name = unicode(client_name).translate(

2269

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

2270

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

2271

new_client.dbus_object_path = (dbus.ObjectPath

2272

("/clients/"

2273

+ client_object_name))

2274

DBusObjectWithProperties.__init__(new_client,

2275

new_client.bus,

2276

new_client

2277

.dbus_object_path)

2278

else:

2279

tcp_server.clients[client_name] = (Client.__new__

2280

(Client))

2281

for name, value in client.iteritems():

2282

setattr(tcp_server.clients[client_name],

2283

name, value)

2284

2619

logger.debug("Last checker succeeded,"

2620

" keeping {0} enabled"

2621

.format(client_name))

2285

2622

try:

2286

tcp_server.clients[client_name].secret = (

2287

crypt.decrypt(tcp_server.clients[client_name]

2288

.encrypted_secret,

2289

client_settings[client_name]

2290

["secret"]))

2291

except CryptoError:

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

2627

except PGPError:

2292

2628

# If decryption fails, we use secret from new settings

2293

tcp_server.clients[client_name].secret = (

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2294

2632

client_settings[client_name]["secret"])

2295

2633

2296

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

2297

for clientname in set(old_client_settings) - set(client_settings):

2298

del tcp_server.clients[clientname]

2299

for clientname in set(client_settings) - set(old_client_settings):

2300

tcp_server.clients[clientname] = (client_class(name

2301

= clientname,

2302

config =

2303

client_settings

2304

[clientname]))

2634

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

2635

for client_name in (set(old_client_settings)

2636

- set(client_settings)):

2637

del clients_data[client_name]

2638

for client_name in (set(client_settings)

2639

- set(old_client_settings)):

2640

clients_data[client_name] = client_settings[client_name]

2641

2642

# Create all client objects

2643

for client_name, client in clients_data.iteritems():

2644

tcp_server.clients[client_name] = client_class(

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2305

2647

2306

2648

if not tcp_server.clients:

2307

2649

logger.warning("No clients defined")

2308

2309

if not debug:

2310

try:

2311

with pidfile:

2312

pid = os.getpid()

2313

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

2314

del pidfile

2315

except IOError:

2316

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

2317

pidfilename, pid)

2318

except NameError:

2319

# "pidfile" was never created

2320

pass

2650

2651

if not foreground:

2652

if pidfile is not None:

2653

try:

2654

with pidfile:

2655

pid = os.getpid()

2656

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

2657

except IOError:

2658

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

2659

pidfilename, pid)

2660

del pidfile

2321

2661

del pidfilename

2322

2323

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

2324

2662

2325

2663

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

2326

2664

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

2327

2665

2328

2666

if use_dbus:

2329

class MandosDBusService(dbus.service.Object):

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

2330

2670

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

2331

2671

def __init__(self):

2332

2672

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

2333

2673

_interface = "se.recompile.Mandos"

2334

2674

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

2335

2681

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

2336

2682

def ClientAdded(self, objpath):

2337

2683

"D-Bus signal"

2379

2725

2380

2726

del _interface

2381

2727

2382

class MandosDBusServiceTransitional(MandosDBusService):

2383

__metaclass__ = AlternateDBusNamesMetaclass

2384

mandos_dbus_service = MandosDBusServiceTransitional()

2728

mandos_dbus_service = MandosDBusService()

2385

2729

2386

2730

def cleanup():

2387

2731

"Cleanup function; run on exit"

2388

2732

service.cleanup()

2389

2733

2390

2734

multiprocessing.active_children()

2735

wnull.close()

2391

2736

if not (tcp_server.clients or client_settings):

2392

2737

return

2393

2738

2394

2739

# Store client before exiting. Secrets are encrypted with key

2395

2740

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

2396

2741

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

2397

clients = []

2398

with Crypto() as crypt:

2742

clients = {}

2743

with PGPEngine() as pgp:

2399

2744

for client in tcp_server.clients.itervalues():

2400

2745

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

2401

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

2402

key)

2746

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

2747

key)

2403

2748

client_dict = {}

2404

2749

2405

# A list of attributes that will not be stored when

2406

# shutting down.

2407

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

2750

# A list of attributes that can not be pickled

2751

# + secret.

2752

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

2753

"checker", "server_settings"))

2408

2754

for name, typ in (inspect.getmembers

2409

2755

(dbus.service.Object)):

2410

2756

exclude.add(name)

2415

2761

if attr not in exclude:

2416

2762

client_dict[attr] = getattr(client, attr)

2417

2763

2418

clients.append(client_dict)

2764

clients[client.name] = client_dict

2419

2765

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

2420

2766

2421

2767

try:

2422

with os.fdopen(os.open(stored_state_path,

2423

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2424

0600), "wb") as stored_state:

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2425

2772

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

2773

tempname=stored_state.name

2774

os.rename(tempname, stored_state_path)

2426

2775

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if e.errno not in (errno.ENOENT, errno.EACCES):

2430

raise

2776

if not debug:

2777

try:

2778

os.remove(tempname)

2779

except NameError:

2780

pass

2781

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

2782

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

2783

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

2784

else:

2785

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

2786

exc_info=e)

2787

raise e

2431

2788

2432

2789

# Delete all clients, and settings from config

2433

2790

while tcp_server.clients:

2460

2817

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

2461

2818

if use_ipv6:

2462

2819

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

2463

" flowinfo %d, scope_id %d"

2464

% tcp_server.socket.getsockname())

2820

" flowinfo %d, scope_id %d",

2821

*tcp_server.socket.getsockname())

2465

2822

else: # IPv4

2466

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

2467

% tcp_server.socket.getsockname())

2823

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

2824

*tcp_server.socket.getsockname())

2468

2825

2469

2826

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

2470

2827

2473

2830

try:

2474

2831

service.activate()

2475

2832

except dbus.exceptions.DBusException as error:

2476

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

2833

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

2477

2834

cleanup()

2478

2835

sys.exit(1)

2479

2836

# End of Avahi example code

2486

2843

logger.debug("Starting main loop")

2487

2844

main_loop.run()

2488

2845

except AvahiError as error:

2489

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

2846

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

2490

2847

cleanup()

2491

2848

sys.exit(1)

2492

2849

except KeyboardInterrupt:

2497

2854

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

2498

2855

cleanup()

2499

2856

2500

2501

2857

if __name__ == '__main__':

2502

2858

main()