/mandos/release : revision 237.25.5

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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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 = "1.6.0"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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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 password_encode(self, password):

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

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

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return b"mandos" + binascii.hexlify(password)

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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See <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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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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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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logger.critical("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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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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str(error))

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

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.format(error))

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def cleanup(self):

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class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

400

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

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401

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

386

ret = AvahiService.rename(self)

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

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syslogger.setFormatter(logging.Formatter

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

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('Mandos ({}) [%(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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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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"fingerprint", "host", "interval",

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"last_approval_request", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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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": "0s",

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"approval_duration": "1s",

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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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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

476

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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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497

"rb") as secfile:

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

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499

else:

505

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

500

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

506

501

.format(section))

507

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

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client["extended_timeout"] = string_to_delta(

519

514

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return settings

521

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522

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

517

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

523

518

self.name = name

519

if server_settings is None:

520

server_settings = {}

521

self.server_settings = server_settings

524

522

# adding all client settings

525

for setting, value in settings.iteritems():

523

for setting, value in settings.items():

526

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setattr(self, setting, value)

527

525

528

526

if self.enabled:

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609

if self.checker_initiator_tag is not None:

612

610

gobject.source_remove(self.checker_initiator_tag)

613

611

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

612

(int(self.interval

613

.total_seconds() * 1000),

615

614

self.start_checker))

616

615

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

617

616

if self.disable_initiator_tag is not None:

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617

gobject.source_remove(self.disable_initiator_tag)

619

618

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

660

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

661

662

def need_approval(self):

679

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

680

try:

681

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

686

687

else:

687

688

if pid:

688

689

logger.warning("Checker was a zombie")

692

693

# Start a new checker if needed

693

694

if self.checker is None:

694

695

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

699

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

713

721

self.checker = subprocess.Popen(command,

714

722

close_fds=True,

715

shell=True, cwd="/")

723

shell=True, cwd="/",

724

**popen_args)

716

725

except OSError as error:

717

726

logger.error("Failed to start subprocess",

718

727

exc_info=error)

728

return True

719

729

self.checker_callback_tag = (gobject.child_watch_add

720

730

(self.checker.pid,

721

731

self.checker_callback,

722

732

data=command))

723

733

# The checker may have completed before the gobject

724

734

# watch was added. Check for this.

725

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

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

726

744

if pid:

727

745

gobject.source_remove(self.checker_callback_tag)

728

746

self.checker_callback(pid, status, command)

764

782

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

765

783

if byte_arrays and signature != "ay":

766

784

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

767

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

785

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

768

786

def decorator(func):

769

787

func._dbus_is_property = True

770

788

func._dbus_interface = dbus_interface

801

819

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

802

820

Usage:

803

821

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

804

825

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

805

826

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

827

def Property_dbus_property(self):

810

828

return dbus.Boolean(False)

811

829

"""

818

836

class DBusPropertyException(dbus.exceptions.DBusException):

819

837

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

820

838

"""

821

def __unicode__(self):

822

return unicode(str(self))

823

839

pass

824

840

825

841

class DBusPropertyAccessException(DBusPropertyException):

826

842

"""A property's access permissions disallows an operation.

849

865

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

850

866

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

851

867

"""

852

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

868

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

853

869

False)

854

870

855

871

def _get_all_dbus_things(self, thing):

904

920

# The byte_arrays option is not supported yet on

905

921

# signatures other than "ay".

906

922

if prop._dbus_signature != "ay":

907

raise ValueError

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

908

926

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

909

927

for byte in value))

910

928

prop(value)

934

952

value.variant_level+1)

935

953

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

936

954

955

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

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

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

959

standard.

960

"""

961

pass

962

937

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

964

out_signature="s",

939

965

path_keyword='object_path',

974

1000

(prop,

975

1001

"_dbus_annotations",

976

1002

{}))

977

for name, value in annots.iteritems():

1003

for name, value in annots.items():

978

1004

ann_tag = document.createElement(

979

1005

"annotation")

980

1006

ann_tag.setAttribute("name", name)

983

1009

# Add interface annotation tags

984

1010

for annotation, value in dict(

985

1011

itertools.chain.from_iterable(

986

annotations().iteritems()

1012

annotations().items()

987

1013

for name, annotations in

988

1014

self._get_all_dbus_things("interface")

989

1015

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

990

)).iteritems():

1016

)).items():

991

1017

ann_tag = document.createElement("annotation")

992

1018

ann_tag.setAttribute("name", annotation)

993

1019

ann_tag.setAttribute("value", value)

1049

1075

"""

1050

1076

def wrapper(cls):

1051

1077

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1078

alt_interface_names.items()):

1053

1079

attr = {}

1054

1080

interface_names = set()

1055

1081

# Go though all attributes of the class

1068

1094

interface_names.add(alt_interface)

1069

1095

# Is this a D-Bus signal?

1070

1096

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

1071

# Extract the original non-method function by

1072

# black magic

1097

# Extract the original non-method undecorated

1098

# function by black magic

1073

1099

nonmethod_func = (dict(

1074

1100

zip(attribute.func_code.co_freevars,

1075

1101

attribute.__closure__))["func"]

1172

1198

attribute.func_closure)))

1173

1199

if deprecate:

1174

1200

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1201

iname="_AlternateDBusNames_interface_annotation{}"

1176

1202

for interface_name in interface_names:

1177

1203

@dbus_interface_annotations(interface_name)

1178

1204

def func(self):

1187

1213

if interface_names:

1188

1214

# Replace the class with a new subclass of it with

1189

1215

# methods, signals, etc. as created above.

1190

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

1216

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

1191

1217

(cls,), attr)

1192

1218

return cls

1193

1219

return wrapper

1206

1232

runtime_expansions = (Client.runtime_expansions

1207

1233

+ ("dbus_object_path",))

1208

1234

1235

_interface = "se.recompile.Mandos.Client"

1236

1209

1237

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

1210

1238

1211

1239

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

1213

1241

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

1214

1242

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

1215

1243

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1244

client_object_name = str(self.name).translate(

1217

1245

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

1218

1246

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

1219

1247

self.dbus_object_path = (dbus.ObjectPath

1223

1251

1224

1252

def notifychangeproperty(transform_func,

1225

1253

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1227

1256

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

1228

1257

its changes to DBus.

1229

1258

1234

1263

to the D-Bus. Default: no transform

1235

1264

variant_level: D-Bus variant level. Default: 1

1236

1265

"""

1237

attrname = "_{0}".format(dbus_name)

1266

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

1238

1267

def setter(self, value):

1239

1268

if hasattr(self, "dbus_object_path"):

1240

1269

if (not hasattr(self, attrname) or

1241

1270

type_func(getattr(self, attrname, None))

1242

1271

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1248

1287

setattr(self, attrname, value)

1249

1288

1250

1289

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

1270

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1271

1310

"ApprovalDelay",

1272

1311

type_func =

1273

timedelta_to_milliseconds)

1312

lambda td: td.total_seconds()

1313

* 1000)

1274

1314

approval_duration = notifychangeproperty(

1275

1315

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1316

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

1277

1317

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

1278

1318

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

1279

type_func =

1280

timedelta_to_milliseconds)

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1281

1321

extended_timeout = notifychangeproperty(

1282

1322

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1323

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

1284

1324

interval = notifychangeproperty(dbus.UInt64,

1285

1325

"Interval",

1286

1326

type_func =

1287

timedelta_to_milliseconds)

1327

lambda td: td.total_seconds()

1328

* 1000)

1288

1329

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

1330

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

1331

invalidate_only=True)

1289

1332

1290

1333

del notifychangeproperty

1291

1334

1318

1361

*args, **kwargs)

1319

1362

1320

1363

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1364

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

1326

1365

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

1327

1366

# Only if new checker process was started

1328

1367

if (self.checker is not None

1337

1376

1338

1377

def approve(self, value=True):

1339

1378

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1379

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

1380

* 1000), self._reset_approved)

1343

1381

self.send_changedstate()

1344

1382

1345

1383

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1384

1348

1385

## Interfaces

1349

1386

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1387

## Signals

1356

1388

1357

1389

# CheckerCompleted - signal

1367

1399

pass

1368

1400

1369

1401

# PropertyChanged - signal

1402

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

1370

1403

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

1371

1404

def PropertyChanged(self, property, value):

1372

1405

"D-Bus signal"

1448

1481

access="readwrite")

1449

1482

def ApprovalDelay_dbus_property(self, value=None):

1450

1483

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1484

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

1485

* 1000)

1452

1486

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

1453

1487

1454

1488

# ApprovalDuration - property

1456

1490

access="readwrite")

1457

1491

def ApprovalDuration_dbus_property(self, value=None):

1458

1492

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1493

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

1494

* 1000)

1461

1495

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

1462

1496

1463

1497

# Name - property

1476

1510

def Host_dbus_property(self, value=None):

1477

1511

if value is None: # get

1478

1512

return dbus.String(self.host)

1479

self.host = unicode(value)

1513

self.host = str(value)

1480

1514

1481

1515

# Created - property

1482

1516

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

1529

1563

access="readwrite")

1530

1564

def Timeout_dbus_property(self, value=None):

1531

1565

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

1566

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

1533

1567

old_timeout = self.timeout

1534

1568

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

1535

1569

# Reschedule disabling

1546

1580

gobject.source_remove(self.disable_initiator_tag)

1547

1581

self.disable_initiator_tag = (

1548

1582

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1551

1585

1552

1586

# ExtendedTimeout - property

1553

1587

@dbus_service_property(_interface, signature="t",

1554

1588

access="readwrite")

1555

1589

def ExtendedTimeout_dbus_property(self, value=None):

1556

1590

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1591

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

1592

* 1000)

1558

1593

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

1559

1594

1560

1595

# Interval - property

1562

1597

access="readwrite")

1563

1598

def Interval_dbus_property(self, value=None):

1564

1599

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

1600

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

1566

1601

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

1567

1602

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

1568

1603

return

1579

1614

def Checker_dbus_property(self, value=None):

1580

1615

if value is None: # get

1581

1616

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1617

self.checker_command = str(value)

1583

1618

1584

1619

# CheckerRunning - property

1585

1620

@dbus_service_property(_interface, signature="b",

1601

1636

@dbus_service_property(_interface, signature="ay",

1602

1637

access="write", byte_arrays=True)

1603

1638

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1639

self.secret = bytes(value)

1605

1640

1606

1641

del _interface

1607

1642

1641

1676

def handle(self):

1642

1677

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

1643

1678

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

1644

unicode(self.client_address))

1679

str(self.client_address))

1645

1680

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

1646

1681

self.server.child_pipe.fileno())

1647

1682

1673

1708

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

1674

1709

try:

1675

1710

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

1676

raise RuntimeError

1711

raise RuntimeError(line)

1677

1712

except (ValueError, IndexError, RuntimeError) as error:

1678

1713

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

1679

1714

return

1728

1763

if self.server.use_dbus:

1729

1764

# Emit D-Bus signal

1730

1765

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1733

1768

else:

1734

1769

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

1735

1770

client.name)

1741

1776

#wait until timeout or approved

1742

1777

time = datetime.datetime.now()

1743

1778

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1779

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

1747

1780

client.changedstate.release()

1748

1781

time2 = datetime.datetime.now()

1749

1782

if (time2 - time) >= delay:

1886

1919

1887

1920

def add_pipe(self, parent_pipe, proc):

1888

1921

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

1889

raise NotImplementedError

1922

raise NotImplementedError()

1890

1923

1891

1924

1892

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1948

1981

try:

1949

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1950

1983

SO_BINDTODEVICE,

1951

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

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1952

1986

except socket.error as error:

1953

1987

if error.errno == errno.EPERM:

1954

1988

logger.error("No permission to bind to"

1968

2002

if self.address_family == socket.AF_INET6:

1969

2003

any_address = "::" # in6addr_any

1970

2004

else:

1971

any_address = socket.INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

1972

2006

self.server_address = (any_address,

1973

2007

self.server_address[1])

1974

2008

elif not self.server_address[1]:

2090

2124

return True

2091

2125

2092

2126

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

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

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

2093

2226

def string_to_delta(interval):

2094

2227

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

2095

2228

2106

2239

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

2107

2240

datetime.timedelta(0, 330)

2108

2241

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2109

2248

timevalue = datetime.timedelta(0)

2110

2249

for s in interval.split():

2111

2250

try:

2112

suffix = unicode(s[-1])

2251

suffix = s[-1]

2113

2252

value = int(s[:-1])

2114

2253

if suffix == "d":

2115

2254

delta = datetime.timedelta(value)

2122

2261

elif suffix == "w":

2123

2262

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

2124

2263

else:

2125

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

2264

raise ValueError("Unknown suffix {!r}"

2126

2265

.format(suffix))

2127

except (ValueError, IndexError) as e:

2266

except IndexError as e:

2128

2267

raise ValueError(*(e.args))

2129

2268

timevalue += delta

2130

2269

return timevalue

2145

2284

# Close all standard open file descriptors

2146

2285

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

2147

2286

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

2148

raise OSError(errno.ENODEV,

2149

"{0} not a character device"

2287

raise OSError(errno.ENODEV, "{} not a character device"

2150

2288

.format(os.devnull))

2151

2289

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

2152

2290

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

2162

2300

2163

2301

parser = argparse.ArgumentParser()

2164

2302

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

2165

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

2303

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

2166

2304

help="show version number and exit")

2167

2305

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

2168

2306

help="Bind to interface IF")

2174

2312

help="Run self-test")

2175

2313

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

2176

2314

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

2177

" to terminal")

2315

" to terminal", default=None)

2178

2316

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

2179

2317

help="Debug level for stdout output")

2180

2318

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

2187

2325

" files")

2188

2326

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

2189

2327

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

2190

" system bus interface")

2328

" system bus interface", default=None)

2191

2329

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

2192

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

2330

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

2331

default=None)

2193

2332

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

2194

2333

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

2195

" state")

2334

" state", default=None)

2196

2335

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

2197

2336

help="Specify a file descriptor to a network"

2198

2337

" socket to use instead of creating one")

2199

2338

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

2200

2339

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

2201

2340

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

2202

help="Run in foreground")

2341

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

2342

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

2343

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

2344

default=None)

2203

2345

2204

2346

options = parser.parse_args()

2205

2347

2206

2348

if options.check:

2207

2349

import doctest

2208

doctest.testmod()

2209

sys.exit()

2350

fail_count, test_count = doctest.testmod()

2351

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

2210

2352

2211

2353

# Default values for config file for server-global settings

2212

2354

server_defaults = { "interface": "",

2214

2356

"port": "",

2215

2357

"debug": "False",

2216

2358

"priority":

2217

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

2359

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2218

2360

"servicename": "Mandos",

2219

2361

"use_dbus": "True",

2220

2362

"use_ipv6": "True",

2223

2365

"socket": "",

2224

2366

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

2225

2367

"foreground": "False",

2368

"zeroconf": "True",

2226

2369

}

2227

2370

2228

2371

# Parse config file for server-global settings

2255

2398

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

2256

2399

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

2257

2400

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

2258

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

2401

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

2259

2402

value = getattr(options, option)

2260

2403

if value is not None:

2261

2404

server_settings[option] = value

2262

2405

del options

2263

2406

# Force all strings to be unicode

2264

2407

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2411

# Force all boolean options to be boolean

2412

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

2413

"foreground", "zeroconf"):

2414

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

2267

2415

# Debug implies foreground

2268

2416

if server_settings["debug"]:

2269

2417

server_settings["foreground"] = True

2271

2419

2272

2420

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

2273

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

2274

2428

# For convenience

2275

2429

debug = server_settings["debug"]

2276

2430

debuglevel = server_settings["debuglevel"]

2279

2433

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

2280

2434

stored_state_file)

2281

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2282

2437

2283

2438

if debug:

2284

2439

initlogger(debug, logging.DEBUG)

2291

2446

2292

2447

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

2293

2448

syslogger.setFormatter(logging.Formatter

2294

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

2449

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

2295

2450

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

2296

2451

.format(server_settings

2297

2452

["servicename"])))

2305

2460

global mandos_dbus_service

2306

2461

mandos_dbus_service = None

2307

2462

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2308

2466

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

2309

2467

server_settings["port"]),

2310

2468

ClientHandler,

2314

2472

gnutls_priority=

2315

2473

server_settings["priority"],

2316

2474

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2475

socketfd=socketfd)

2319

2476

if not foreground:

2320

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

2477

pidfilename = "/run/mandos.pid"

2478

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

2479

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

2321

2480

pidfile = None

2322

2481

try:

2323

2482

pidfile = open(pidfilename, "w")

2340

2499

os.setuid(uid)

2341

2500

except OSError as error:

2342

2501

if error.errno != errno.EPERM:

2343

raise error

2502

raise

2344

2503

2345

2504

if debug:

2346

2505

# Enable all possible GnuTLS debugging

2389

2548

use_dbus = False

2390

2549

server_settings["use_dbus"] = False

2391

2550

tcp_server.use_dbus = False

2392

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2393

service = AvahiServiceToSyslog(name =

2394

server_settings["servicename"],

2395

servicetype = "_mandos._tcp",

2396

protocol = protocol, bus = bus)

2397

if server_settings["interface"]:

2398

service.interface = (if_nametoindex

2399

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

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2400

2561

2401

2562

global multiprocessing_manager

2402

2563

multiprocessing_manager = multiprocessing.Manager()

2409

2570

old_client_settings = {}

2410

2571

clients_data = {}

2411

2572

2573

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

2574

global wnull

2575

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

2576

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

2577

# mode

2578

if debug or not foreground:

2579

wnull.close()

2580

2412

2581

# Get client data and settings from last running state.

2413

2582

if server_settings["restore"]:

2414

2583

try:

2418

2587

os.remove(stored_state_path)

2419

2588

except IOError as e:

2420

2589

if e.errno == errno.ENOENT:

2421

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

2590

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

2422

2591

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

2423

2592

else:

2424

2593

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

2429

2598

"EOFError:", exc_info=e)

2430

2599

2431

2600

with PGPEngine() as pgp:

2432

for client_name, client in clients_data.iteritems():

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2433

2606

# Decide which value to use after restoring saved state.

2434

2607

# We have three different values: Old config file,

2435

2608

# new config file, and saved state.

2456

2629

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

2457

2630

if not client["last_checked_ok"]:

2458

2631

logger.warning(

2459

"disabling client {0} - Client never "

2632

"disabling client {} - Client never "

2460

2633

"performed a successful checker"

2461

2634

.format(client_name))

2462

2635

client["enabled"] = False

2463

2636

elif client["last_checker_status"] != 0:

2464

2637

logger.warning(

2465

"disabling client {0} - Client "

2466

"last checker failed with error code {1}"

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2467

2640

.format(client_name,

2468

2641

client["last_checker_status"]))

2469

2642

client["enabled"] = False

2472

2645

.utcnow()

2473

2646

+ client["timeout"])

2474

2647

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2648

" keeping {} enabled"

2476

2649

.format(client_name))

2477

2650

try:

2478

2651

client["secret"] = (

2481

2654

["secret"]))

2482

2655

except PGPError:

2483

2656

# If decryption fails, we use secret from new settings

2484

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

2657

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

2485

2658

.format(client_name))

2486

2659

client["secret"] = (

2487

2660

client_settings[client_name]["secret"])

2495

2668

clients_data[client_name] = client_settings[client_name]

2496

2669

2497

2670

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

2671

for client_name, client in clients_data.items():

2499

2672

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2501

2675

2502

2676

if not tcp_server.clients:

2503

2677

logger.warning("No clients defined")

2507

2681

try:

2508

2682

with pidfile:

2509

2683

pid = os.getpid()

2510

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

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

2511

2685

except IOError:

2512

2686

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

2513

2687

pidfilename, pid)

2559

2733

def GetAllClientsWithProperties(self):

2560

2734

"D-Bus method"

2561

2735

return dbus.Dictionary(

2562

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

2563

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

2736

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

2737

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

2564

2738

signature="oa{sv}")

2565

2739

2566

2740

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

2583

2757

2584

2758

def cleanup():

2585

2759

"Cleanup function; run on exit"

2586

service.cleanup()

2760

if zeroconf:

2761

service.cleanup()

2587

2762

2588

2763

multiprocessing.active_children()

2764

wnull.close()

2589

2765

if not (tcp_server.clients or client_settings):

2590

2766

return

2591

2767

2602

2778

2603

2779

# A list of attributes that can not be pickled

2604

2780

# + secret.

2605

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

2606

"checker"))

2781

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

2782

"checker", "server_settings" }

2607

2783

for name, typ in (inspect.getmembers

2608

2784

(dbus.service.Object)):

2609

2785

exclude.add(name)

2632

2808

except NameError:

2633

2809

pass

2634

2810

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

2635

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

2811

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

2636

2812

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

2637

2813

else:

2638

2814

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

2639

2815

exc_info=e)

2640

raise e

2816

raise

2641

2817

2642

2818

# Delete all clients, and settings from config

2643

2819

while tcp_server.clients:

2667

2843

tcp_server.server_activate()

2668

2844

2669

2845

# Find out what port we got

2670

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

2846

if zeroconf:

2847

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

2671

2848

if use_ipv6:

2672

2849

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

2673

2850

" flowinfo %d, scope_id %d",

2679

2856

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

2680

2857

2681

2858

try:

2682

# From the Avahi example code

2683

try:

2684

service.activate()

2685

except dbus.exceptions.DBusException as error:

2686

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

2687

cleanup()

2688

sys.exit(1)

2689

# End of Avahi example code

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

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

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2690

2868

2691

2869

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

2692

2870

lambda *args, **kwargs: