/mandos/release : revision 295

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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 dbus

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import dbus.service

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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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version = "1.5.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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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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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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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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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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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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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("D-Bus Exception", exc_info=error)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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: {0!s}"

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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

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

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.format(self.name)))

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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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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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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, -2 means no checker completed yet.

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checker, or None.

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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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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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"host", "interval", "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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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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% 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["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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client["last_checker_status"] = None

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return settings

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def __init__(self, settings, name = 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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self.name = name

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# adding all client settings

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for setting, value in settings.iteritems():

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

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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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

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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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", None) is not None:

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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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):

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

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self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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If a checker already exists, leave it running and do

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nothing."""

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

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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

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

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

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

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

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# should be.

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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

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escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

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678

try:

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command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

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try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

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self.current_checker_command = command

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try:

707

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

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self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

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self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

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718

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

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# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

719

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

720

error)

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

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722

return True

731

723

738

730

return

739

731

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

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try:

741

self.checker.terminate()

733

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

742

734

#time.sleep(0.5)

743

735

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

744

# self.checker.kill()

736

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

745

737

except OSError as error:

746

738

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

747

739

raise

764

756

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

765

757

if byte_arrays and signature != "ay":

766

758

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

767

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

759

" signature %r" % signature)

768

760

def decorator(func):

769

761

func._dbus_is_property = True

770

762

func._dbus_interface = dbus_interface

778

770

return decorator

779

771

780

772

781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

818

773

class DBusPropertyException(dbus.exceptions.DBusException):

819

774

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

820

775

"""

843

798

"""

844

799

845

800

@staticmethod

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

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

853

False)

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

854

803

855

def _get_all_dbus_things(self, thing):

804

def _get_all_dbus_properties(self):

856

805

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

857

806

"""

858

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

859

name),

860

athing.__get__(self))

807

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

861

808

for cls in self.__class__.__mro__

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

865

811

866

812

def _get_dbus_property(self, interface_name, property_name):

867

813

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

869

815

"""

870

816

for cls in self.__class__.__mro__:

871

817

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

818

(cls, self._is_dbus_property)):

874

819

if (value._dbus_name == property_name

875

820

and value._dbus_interface == interface_name):

876

821

return value.__get__(self)

918

863

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

919

864

"""

920

865

properties = {}

921

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

866

for name, prop in self._get_all_dbus_properties():

922

867

if (interface_name

923

868

and interface_name != prop._dbus_interface):

924

869

# Interface non-empty but did not match

939

884

path_keyword='object_path',

940

885

connection_keyword='connection')

941

886

def Introspect(self, object_path, connection):

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

887

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

945

888

"""

946

889

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

947

890

connection)

954

897

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

955

898

return e

956

899

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

957

# Add property tags

958

900

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

959

901

for name, prop

960

in self._get_all_dbus_things("property")

902

in self._get_all_dbus_properties()

961

903

if prop._dbus_interface

962

904

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

963

905

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

995

906

# Add the names to the return values for the

996

907

# "org.freedesktop.DBus.Properties" methods

997

908

if (if_tag.getAttribute("name")

1012

923

except (AttributeError, xml.dom.DOMException,

1013

924

xml.parsers.expat.ExpatError) as error:

1014

925

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

1015

exc_info=error)

926

error)

1016

927

return xmlstring

1017

928

1018

929

1019

def datetime_to_dbus(dt, variant_level=0):

930

def datetime_to_dbus (dt, variant_level=0):

1020

931

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

1021

932

if dt is None:

1022

933

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

1024

935

variant_level=variant_level)

1025

936

1026

937

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

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

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

1049

942

"""

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

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

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

1057

950

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

1058

951

# with the wrong interface name

1059

952

if (not hasattr(attribute, "_dbus_interface")

1060

953

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

954

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

1062

955

continue

1063

956

# Create an alternate D-Bus interface name based on

1064

957

# the current name

1065

958

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1069

961

# Is this a D-Bus signal?

1070

962

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

1071

963

# Extract the original non-method function by

1086

978

nonmethod_func.func_name,

1087

979

nonmethod_func.func_defaults,

1088

980

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

1095

981

# Define a creator of a function to call both the

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

982

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

983

# signals gets sent when the function is called

1099

984

def fixscope(func1, func2):

1100

985

"""This function is a scope container to pass

1101

986

func1 and func2 to the "call_both" function

1108

993

return call_both

1109

994

# Create the "call_both" function and add it to

1110

995

# the class

1111

attr[attrname] = fixscope(attribute, new_function)

996

attr[attrname] = fixscope(attribute,

997

new_function)

1112

998

# Is this a D-Bus method?

1113

999

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

1114

1000

# Create a new, but exactly alike, function

1125

1011

attribute.func_name,

1126

1012

attribute.func_defaults,

1127

1013

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

1134

1014

# Is this a D-Bus property?

1135

1015

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

1136

1016

# Create a new, but exactly alike, function

1150

1030

attribute.func_name,

1151

1031

attribute.func_defaults,

1152

1032

attribute.func_closure)))

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

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

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

1033

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

1034

1035

1198

1036

class ClientDBus(Client, DBusObjectWithProperties):

1199

1037

"""A Client class using D-Bus

1200

1038

1220

1058

("/clients/" + client_object_name))

1221

1059

DBusObjectWithProperties.__init__(self, self.bus,

1222

1060

self.dbus_object_path)

1223

1061

1224

1062

def notifychangeproperty(transform_func,

1225

1063

dbus_name, type_func=lambda x: x,

1226

1064

variant_level=1):

1249

1087

1250

1088

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

1251

1089

1090

1252

1091

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

1092

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

1093

"ApprovalPending",

1261

1100

checker is not None)

1262

1101

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1102

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1266

1103

last_approval_request = notifychangeproperty(

1267

1104

datetime_to_dbus, "LastApprovalRequest")

1268

1105

approved_by_default = notifychangeproperty(dbus.Boolean,

1336

1173

return False

1337

1174

1338

1175

def approve(self, value=True):

1176

self.send_changedstate()

1339

1177

self.approved = value

1340

1178

gobject.timeout_add(timedelta_to_milliseconds

1341

1179

(self.approval_duration),

1342

1180

self._reset_approved)

1343

self.send_changedstate()

1181

1344

1182

1345

1183

## D-Bus methods, signals & properties

1346

1184

_interface = "se.recompile.Mandos.Client"

1347

1185

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1186

## Signals

1356

1187

1357

1188

# CheckerCompleted - signal

1508

1339

return

1509

1340

return datetime_to_dbus(self.last_checked_ok)

1510

1341

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1517

1342

# Expires - property

1518

1343

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

1519

1344

def Expires_dbus_property(self):

1530

1355

def Timeout_dbus_property(self, value=None):

1531

1356

if value is None: # get

1532

1357

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1534

1358

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

1535

# Reschedule disabling

1359

# Reschedule timeout

1536

1360

if self.enabled:

1537

1361

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1362

time_to_die = timedelta_to_milliseconds(

1363

(self.last_checked_ok + self.timeout) - now)

1364

if time_to_die <= 0:

1540

1365

# The timeout has passed

1541

1366

self.disable()

1542

1367

else:

1368

self.expires = (now +

1369

datetime.timedelta(milliseconds =

1370

time_to_die))

1543

1371

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

1544

1372

is None):

1545

1373

return

1546

1374

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1375

self.disable_initiator_tag = (gobject.timeout_add

1376

(time_to_die,

1377

self.disable))

1551

1378

1552

1379

# ExtendedTimeout - property

1553

1380

@dbus_service_property(_interface, signature="t",

1632

1459

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

1633

1460

1634

1461

1462

class ClientDBusTransitional(ClientDBus):

1463

__metaclass__ = AlternateDBusNamesMetaclass

1464

1465

1635

1466

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

1467

"""A class to handle client connections.

1637

1468

1741

1572

#wait until timeout or approved

1742

1573

time = datetime.datetime.now()

1743

1574

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1575

(client.changedstate.wait

1576

(float(client.timedelta_to_milliseconds(delay)

1577

/ 1000)))

1747

1578

client.changedstate.release()

1748

1579

time2 = datetime.datetime.now()

1749

1580

if (time2 - time) >= delay:

1765

1596

try:

1766

1597

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

1767

1598

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1599

logger.warning("gnutls send failed")

1770

1600

return

1771

1601

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

1772

1602

sent, len(client.secret)

1775

1605

1776

1606

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

1777

1607

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1608

client.checked_ok(client.extended_timeout)

1779

1609

if self.server.use_dbus:

1780

1610

# Emit D-Bus signal

1781

1611

client.GotSecret()

1786

1616

try:

1787

1617

session.bye()

1788

1618

except gnutls.errors.GNUTLSError as error:

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1619

logger.warning("GnuTLS bye failed")

1791

1620

1792

1621

@staticmethod

1793

1622

def peer_certificate(session):

1865

1694

def process_request(self, request, address):

1866

1695

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

1867

1696

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

1868

args = (request, address))

1697

args = (request,

1698

address))

1869

1699

proc.start()

1870

1700

return proc

1871

1701

1899

1729

use_ipv6: Boolean; to use IPv6 or not

1900

1730

"""

1901

1731

def __init__(self, server_address, RequestHandlerClass,

1902

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

1903

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

1904

creating a new one with socket.socket().

1905

"""

1732

interface=None, use_ipv6=True):

1906

1733

self.interface = interface

1907

1734

if use_ipv6:

1908

1735

self.address_family = socket.AF_INET6

1909

if socketfd is not None:

1910

# Save the file descriptor

1911

self.socketfd = socketfd

1912

# Save the original socket.socket() function

1913

self.socket_socket = socket.socket

1914

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

1915

#

1916

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

1917

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

1918

# patching socket.socket.)

1919

#

1920

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

1921

@functools.wraps(socket.socket)

1922

def socket_wrapper(*args, **kwargs):

1923

# Restore original function so subsequent calls are

1924

# not affected.

1925

socket.socket = self.socket_socket

1926

del self.socket_socket

1927

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

1928

# saved file descriptor.

1929

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

1930

# Replace socket.socket() function with wrapper

1931

socket.socket = socket_wrapper

1932

# The socketserver.TCPServer.__init__ will call

1933

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

1934

# socket_wrapper(), if socketfd was set.

1935

1736

socketserver.TCPServer.__init__(self, server_address,

1936

1737

RequestHandlerClass)

1937

1938

1738

def server_bind(self):

1939

1739

"""This overrides the normal server_bind() function

1940

1740

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

1948

1748

try:

1949

1749

self.socket.setsockopt(socket.SOL_SOCKET,

1950

1750

SO_BINDTODEVICE,

1951

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

1751

str(self.interface

1752

+ '\0'))

1952

1753

except socket.error as error:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1754

if error[0] == errno.EPERM:

1755

logger.error("No permission to"

1756

" bind to interface %s",

1757

self.interface)

1758

elif error[0] == errno.ENOPROTOOPT:

1957

1759

logger.error("SO_BINDTODEVICE not available;"

1958

1760

" cannot bind to interface %s",

1959

1761

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

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

1962

" cannot bind", self.interface)

1963

1762

else:

1964

1763

raise

1965

1764

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

1995

1794

"""

1996

1795

def __init__(self, server_address, RequestHandlerClass,

1997

1796

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

1998

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

1797

gnutls_priority=None, use_dbus=True):

1999

1798

self.enabled = False

2000

1799

self.clients = clients

2001

1800

if self.clients is None:

2005

1804

IPv6_TCPServer.__init__(self, server_address,

2006

1805

RequestHandlerClass,

2007

1806

interface = interface,

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

1807

use_ipv6 = use_ipv6)

2010

1808

def server_activate(self):

2011

1809

if self.enabled:

2012

1810

return socketserver.TCPServer.server_activate(self)

2025

1823

2026

1824

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

2027

1825

proc = None, client_object=None):

1826

condition_names = {

1827

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

1828

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

1829

# blocking).

1830

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

1831

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

1832

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

1833

# broken, usually for pipes and

1834

# sockets).

1835

}

1836

conditions_string = ' | '.join(name

1837

for cond, name in

1838

condition_names.iteritems()

1839

if cond & condition)

2028

1840

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

2029

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

1841

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

2030

1842

# Wait for other process to exit

2031

1843

proc.join()

2032

1844

return False

2122

1934

elif suffix == "w":

2123

1935

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

2124

1936

else:

2125

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

2126

.format(suffix))

1937

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

2127

1938

except (ValueError, IndexError) as e:

2128

1939

raise ValueError(*(e.args))

2129

1940

timevalue += delta

2143

1954

sys.exit()

2144

1955

if not noclose:

2145

1956

# Close all standard open file descriptors

2146

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

1957

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

2147

1958

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

2148

1959

raise OSError(errno.ENODEV,

2149

"{0} not a character device"

2150

.format(os.devnull))

1960

"%s not a character device"

1961

% os.path.devnull)

2151

1962

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

2152

1963

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

2153

1964

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

2162

1973

2163

1974

parser = argparse.ArgumentParser()

2164

1975

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

2165

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

1976

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

2166

1977

help="show version number and exit")

2167

1978

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

2168

1979

help="Bind to interface IF")

2193

2004

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

2194

2005

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

2195

2006

" state")

2196

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

2197

help="Specify a file descriptor to a network"

2198

" socket to use instead of creating one")

2199

2007

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

2200

2008

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

2201

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

2202

help="Run in foreground")

2203

2009

2204

2010

options = parser.parse_args()

2205

2011

2220

2026

"use_ipv6": "True",

2221

2027

"debuglevel": "",

2222

2028

"restore": "True",

2223

"socket": "",

2224

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

2225

"foreground": "False",

2029

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

2226

2030

}

2227

2031

2228

2032

# Parse config file for server-global settings

2233

2037

# Convert the SafeConfigParser object to a dict

2234

2038

server_settings = server_config.defaults()

2235

2039

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

2236

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

2040

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

2237

2041

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

2238

2042

option)

2239

2043

if server_settings["port"]:

2240

2044

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

2241

2045

"port")

2242

if server_settings["socket"]:

2243

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

2244

"socket")

2245

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

2246

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

2247

# happen with a supplied network socket.

2248

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

2249

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

2250

["socket"])

2251

2046

del server_config

2252

2047

2253

2048

# Override the settings from the config file with command line

2255

2050

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

2256

2051

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

2257

2052

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

2258

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

2053

"statedir"):

2259

2054

value = getattr(options, option)

2260

2055

if value is not None:

2261

2056

server_settings[option] = value

2264

2059

for option in server_settings.keys():

2265

2060

if type(server_settings[option]) is str:

2266

2061

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

2267

# Debug implies foreground

2268

if server_settings["debug"]:

2269

server_settings["foreground"] = True

2270

2062

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

2271

2063

2272

2064

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

2278

2070

use_ipv6 = server_settings["use_ipv6"]

2279

2071

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

2280

2072

stored_state_file)

2281

foreground = server_settings["foreground"]

2282

2073

2283

2074

if debug:

2284

2075

initlogger(debug, logging.DEBUG)

2291

2082

2292

2083

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

2293

2084

syslogger.setFormatter(logging.Formatter

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

2085

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

2086

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

2087

% server_settings["servicename"]))

2298

2088

2299

2089

# Parse config file with clients

2300

2090

client_config = configparser.SafeConfigParser(Client

2313

2103

use_ipv6=use_ipv6,

2314

2104

gnutls_priority=

2315

2105

server_settings["priority"],

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2319

if not foreground:

2106

use_dbus=use_dbus)

2107

if not debug:

2320

2108

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

2321

pidfile = None

2322

2109

try:

2323

2110

pidfile = open(pidfilename, "w")

2324

except IOError as e:

2325

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

2326

exc_info=e)

2111

except IOError:

2112

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

2327

2113

2328

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

2114

try:

2115

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

2116

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

2117

except KeyError:

2329

2118

try:

2330

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

2332

break

2119

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

2120

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

2333

2121

except KeyError:

2334

continue

2335

else:

2336

uid = 65534

2337

gid = 65534

2122

try:

2123

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

2124

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

2125

except KeyError:

2126

uid = 65534

2127

gid = 65534

2338

2128

try:

2339

2129

os.setgid(gid)

2340

2130

os.setuid(uid)

2341

2131

except OSError as error:

2342

if error.errno != errno.EPERM:

2132

if error[0] != errno.EPERM:

2343

2133

raise error

2344

2134

2345

2135

if debug:

2357

2147

.gnutls_global_set_log_function(debug_gnutls))

2358

2148

2359

2149

# Redirect stdin so all checkers get /dev/null

2360

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

2150

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

2361

2151

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

2362

2152

if null > 2:

2363

2153

os.close(null)

2364

2154

2365

2155

# Need to fork before connecting to D-Bus

2366

if not foreground:

2156

if not debug:

2367

2157

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

2368

2158

daemon()

2369

2159

2370

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

2371

# need to inform gobject that threads will be used.

2372

2160

gobject.threads_init()

2373

2161

2374

2162

global main_loop

2375

2163

# From the Avahi example code

2376

DBusGMainLoop(set_as_default=True)

2164

DBusGMainLoop(set_as_default=True )

2377

2165

main_loop = gobject.MainLoop()

2378

2166

bus = dbus.SystemBus()

2379

2167

# End of Avahi example code

2385

2173

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

2386

2174

do_not_queue=True))

2387

2175

except dbus.exceptions.NameExistsException as e:

2388

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

2176

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

2389

2177

use_dbus = False

2390

2178

server_settings["use_dbus"] = False

2391

2179

tcp_server.use_dbus = False

2403

2191

2404

2192

client_class = Client

2405

2193

if use_dbus:

2406

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

2194

client_class = functools.partial(ClientDBusTransitional,

2195

bus = bus)

2407

2196

2408

2197

client_settings = Client.config_parser(client_config)

2409

2198

old_client_settings = {}

2417

2206

(stored_state))

2418

2207

os.remove(stored_state_path)

2419

2208

except IOError as e:

2420

if e.errno == errno.ENOENT:

2421

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

2422

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

2423

else:

2424

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

2425

exc_info=e)

2209

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

2210

.format(e))

2211

if e.errno != errno.ENOENT:

2426

2212

raise

2427

2213

except EOFError as e:

2428

2214

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

2429

"EOFError:", exc_info=e)

2215

"EOFError: {0}".format(e))

2430

2216

2431

2217

with PGPEngine() as pgp:

2432

2218

for client_name, client in clients_data.iteritems():

2485

2271

.format(client_name))

2486

2272

client["secret"] = (

2487

2273

client_settings[client_name]["secret"])

2274

2488

2275

2489

2276

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

2490

2277

for client_name in (set(old_client_settings)

2493

2280

for client_name in (set(client_settings)

2494

2281

- set(old_client_settings)):

2495

2282

clients_data[client_name] = client_settings[client_name]

2496

2283

2497

2284

# Create all client objects

2498

2285

for client_name, client in clients_data.iteritems():

2499

2286

tcp_server.clients[client_name] = client_class(

2501

2288

2502

2289

if not tcp_server.clients:

2503

2290

logger.warning("No clients defined")

2504

2505

if not foreground:

2506

if pidfile is not None:

2507

try:

2508

with pidfile:

2509

pid = os.getpid()

2510

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

2511

except IOError:

2512

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

2513

pidfilename, pid)

2514

del pidfile

2291

2292

if not debug:

2293

try:

2294

with pidfile:

2295

pid = os.getpid()

2296

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

2297

del pidfile

2298

except IOError:

2299

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

2300

pidfilename, pid)

2301

except NameError:

2302

# "pidfile" was never created

2303

pass

2515

2304

del pidfilename

2305

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

2516

2306

2517

2307

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

2518

2308

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

2519

2309

2520

2310

if use_dbus:

2521

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

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

2311

class MandosDBusService(dbus.service.Object):

2524

2312

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

2525

2313

def __init__(self):

2526

2314

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

2527

2315

_interface = "se.recompile.Mandos"

2528

2316

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2534

2535

2317

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

2536

2318

def ClientAdded(self, objpath):

2537

2319

"D-Bus signal"

2579

2361

2580

2362

del _interface

2581

2363

2582

mandos_dbus_service = MandosDBusService()

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2583

2367

2584

2368

def cleanup():

2585

2369

"Cleanup function; run on exit"

2618

2402

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

2619

2403

2620

2404

try:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2405

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2406

prefix="clients-",

2407

dir=os.path.dirname

2408

(stored_state_path))

2409

with os.fdopen(tempfd, "wb") as stored_state:

2625

2410

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

2626

tempname=stored_state.name

2627

2411

os.rename(tempname, stored_state_path)

2628

2412

except (IOError, OSError) as e:

2413

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

2414

.format(e))

2629

2415

if not debug:

2630

2416

try:

2631

2417

os.remove(tempname)

2632

2418

except NameError:

2633

2419

pass

2634

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

2635

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

2636

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

2637

else:

2638

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

2639

exc_info=e)

2420

if e.errno not in set((errno.ENOENT, errno.EACCES,

2421

errno.EEXIST)):

2640

2422

raise e

2641

2423

2642

2424

# Delete all clients, and settings from config

2670

2452

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

2671

2453

if use_ipv6:

2672

2454

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

2673

" flowinfo %d, scope_id %d",

2674

*tcp_server.socket.getsockname())

2455

" flowinfo %d, scope_id %d"

2456

% tcp_server.socket.getsockname())

2675

2457

else: # IPv4

2676

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

2677

*tcp_server.socket.getsockname())

2458

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

2459

% tcp_server.socket.getsockname())

2678

2460

2679

2461

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

2680

2462

2683

2465

try:

2684

2466

service.activate()

2685

2467

except dbus.exceptions.DBusException as error:

2686

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

2468

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

2687

2469

cleanup()

2688

2470

sys.exit(1)

2689

2471

# End of Avahi example code

2696

2478

logger.debug("Starting main loop")

2697

2479

main_loop.run()

2698

2480

except AvahiError as error:

2699

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

2481

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

2700

2482

cleanup()

2701

2483

sys.exit(1)

2702

2484

except KeyboardInterrupt: