/mandos/release : revision 237.7.271

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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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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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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 = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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version = "1.6.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(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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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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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" 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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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

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def _timedelta_to_milliseconds(td):

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"last_approval_request", "last_checked_ok",

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

493

"""

494

settings = {}

495

for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

508

if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

532

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

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self.name = name

338

if config is None:

339

config = {}

535

if server_settings is None:

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server_settings = {}

537

self.server_settings = server_settings

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# adding all client settings

539

for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

549

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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555

# function

344

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

345

.replace(" ", ""))

346

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

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if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

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else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

557

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

558

datetime.datetime.utcnow())

559

560

# attributes specific for this server instance

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self.checker = None

368

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

370

self.expires = None

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self.checker_callback_tag = None

372

self.checker_command = config["checker"]

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self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

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self.approved = None

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self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

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config["approval_duration"])

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

568

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

572

self.__dict__.iterkeys()

573

if not attr.startswith("_")]

574

self.client_structure.append("client_structure")

575

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

577

lambda obj:

578

isinstance(obj,

579

property)):

580

if not name.startswith("_"):

581

self.client_structure.append(name)

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583

# Send notice to process children that client state has changed

385

584

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

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self.changedstate.release()

389

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with self.changedstate:

586

self.changedstate.notify_all()

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def enable(self):

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

392

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

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# Already enabled

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return

593

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

594

self.enabled = True

595

self.last_enabled = datetime.datetime.utcnow()

596

self.init_checker()

395

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self.send_changedstate()

598

599

def disable(self, quiet=True):

600

"""Disable this client."""

601

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

602

return False

603

if not quiet:

604

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

605

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

606

gobject.source_remove(self.disable_initiator_tag)

607

self.disable_initiator_tag = None

608

self.expires = None

609

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

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = None

612

self.stop_checker()

613

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

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

617

return False

618

619

def __del__(self):

620

self.disable()

621

622

def init_checker(self):

396

623

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

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624

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

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(),

400

629

self.start_checker))

401

630

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

402

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

403

633

self.disable_initiator_tag = (gobject.timeout_add

404

634

(self.timeout_milliseconds(),

405

635

self.disable))

406

self.enabled = True

407

self.last_enabled = datetime.datetime.utcnow()

408

636

# Also start a new checker *right now*.

409

637

self.start_checker()

410

638

411

def disable(self, quiet=True):

412

"""Disable this client."""

413

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

414

return False

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

421

self.disable_initiator_tag = None

422

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

425

self.checker_initiator_tag = None

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

self.enabled = False

430

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

431

return False

432

433

def __del__(self):

434

self.disable_hook = None

435

self.disable()

436

437

639

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

438

640

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

439

641

self.checker_callback_tag = None

440

642

self.checker = None

441

643

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

644

self.last_checker_status = os.WEXITSTATUS(condition)

645

if self.last_checker_status == 0:

444

646

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

445

647

vars(self))

446

648

self.checked_ok()

448

650

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

449

651

vars(self))

450

652

else:

653

self.last_checker_status = -1

451

654

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

452

655

vars(self))

453

656

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

657

def checked_ok(self):

658

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

659

self.last_checked_ok = datetime.datetime.utcnow()

660

self.last_checker_status = 0

661

self.bump_timeout()

662

663

def bump_timeout(self, timeout=None):

664

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

460

665

if timeout is None:

461

666

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

667

if self.disable_initiator_tag is not None:

668

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

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

671

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

673

(timeout), self.disable))

674

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

468

675

469

676

def need_approval(self):

470

677

self.last_approval_request = datetime.datetime.utcnow()

475

682

If a checker already exists, leave it running and do

476

683

nothing."""

477

684

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

685

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

686

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

687

# would inevitably timeout, since no checker would get a

688

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

482

689

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

483

690

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

484

691

# should be.

486

693

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

487

694

try:

488

695

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

493

701

else:

494

702

if pid:

495

703

logger.warning("Checker was a zombie")

498

706

self.current_checker_command)

499

707

# Start a new checker if needed

500

708

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

501

714

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

520

720

self.current_checker_command = command

521

721

try:

522

722

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

525

725

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

526

726

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

527

727

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

528

736

self.checker = subprocess.Popen(command,

529

737

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

537

751

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

752

except OSError as error:

542

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

543

error)

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

544

762

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

545

763

return True

546

764

553

771

return

554

772

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

555

773

try:

556

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

774

self.checker.terminate()

557

775

#time.sleep(0.5)

558

776

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

559

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

777

# self.checker.kill()

560

778

except OSError as error:

561

779

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

562

780

raise

579

797

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

580

798

if byte_arrays and signature != "ay":

581

799

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

582

" signature %r" % signature)

800

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

583

801

def decorator(func):

584

802

func._dbus_is_property = True

585

803

func._dbus_interface = dbus_interface

593

811

return decorator

594

812

595

813

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

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

835

Usage:

836

837

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

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

596

851

class DBusPropertyException(dbus.exceptions.DBusException):

597

852

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

598

853

"""

621

876

"""

622

877

623

878

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

879

def _is_dbus_thing(thing):

880

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

881

882

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

883

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

884

"""

885

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

886

False)

626

887

627

def _get_all_dbus_properties(self):

888

def _get_all_dbus_things(self, thing):

628

889

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

629

890

"""

630

return ((prop._dbus_name, prop)

631

for name, prop in

632

inspect.getmembers(self, self._is_dbus_property))

891

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

892

name),

893

athing.__get__(self))

894

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

633

898

634

# def _get_dbus_property(self, interface_name, property_name):

635

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

636

# property with the specified name and interface.

637

# """

638

# print("get_property({0!r}, {1!r}".format(interface_name, property_name),file=sys.stderr)

639

# print(dir(self), sys.stderr)

640

# for name in (property_name,

641

# property_name + "_dbus_property"):

642

# prop = getattr(self, name, None)

643

# if (prop is None

644

# or not self._is_dbus_property(prop)

645

# or prop._dbus_name != property_name

646

# or (interface_name and prop._dbus_interface

647

# and interface_name != prop._dbus_interface)):

648

# continue

649

# return prop

650

# # No such property

651

# raise DBusPropertyNotFound(self.dbus_object_path + ":"

652

# + interface_name + "."

653

# + property_name)

654

655

899

def _get_dbus_property(self, interface_name, property_name):

656

900

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

657

901

property with the specified name and interface.

658

902

"""

659

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

660

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

661

return value

903

for cls in self.__class__.__mro__:

904

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

907

if (value._dbus_name == property_name

908

and value._dbus_interface == interface_name):

909

return value.__get__(self)

662

910

663

911

# No such property

664

912

raise DBusPropertyNotFound(self.dbus_object_path + ":"

665

913

+ interface_name + "."

666

914

+ property_name)

667

668

915

669

916

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

670

917

out_signature="v")

690

937

# The byte_arrays option is not supported yet on

691

938

# signatures other than "ay".

692

939

if prop._dbus_signature != "ay":

693

raise ValueError

694

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

695

for byte in value))

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

696

945

prop(value)

697

946

698

947

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

703

952

704

953

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

705

954

"""

706

all = {}

707

for name, prop in self._get_all_dbus_properties():

955

properties = {}

956

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

708

957

if (interface_name

709

958

and interface_name != prop._dbus_interface):

710

959

# Interface non-empty but did not match

714

963

continue

715

964

value = prop()

716

965

if not hasattr(value, "variant_level"):

717

all[name] = value

966

properties[name] = value

718

967

continue

719

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

720

value.variant_level+1)

721

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

968

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

969

value.variant_level+1)

970

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

722

971

723

972

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

724

973

out_signature="s",

725

974

path_keyword='object_path',

726

975

connection_keyword='connection')

727

976

def Introspect(self, object_path, connection):

728

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

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

729

980

"""

730

981

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

731

982

connection)

738

989

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

739

990

return e

740

991

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

992

# Add property tags

741

993

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

742

994

for name, prop

743

in self._get_all_dbus_properties()

995

in self._get_all_dbus_things("property")

744

996

if prop._dbus_interface

745

997

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

746

998

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

747

1030

# Add the names to the return values for the

748

1031

# "org.freedesktop.DBus.Properties" methods

749

1032

if (if_tag.getAttribute("name")

764

1047

except (AttributeError, xml.dom.DOMException,

765

1048

xml.parsers.expat.ExpatError) as error:

766

1049

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

767

error)

1050

exc_info=error)

768

1051

return xmlstring

769

1052

770

1053

771

def datetime_to_dbus (dt, variant_level=0):

1054

def datetime_to_dbus(dt, variant_level=0):

772

1055

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

773

1056

if dt is None:

774

1057

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

775

1058

return dbus.String(dt.isoformat(),

776

1059

variant_level=variant_level)

777

1060

778

class transitional_clientdbus(DBusObjectWithProperties.__metaclass__):

779

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

780

for key, old_dbusobj in attr.items():

781

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

782

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

783

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

784

old_dbusobj.__closure__))["func"].cell_contents

785

newfunc = types.FunctionType(unwrappedfunc.func_code,

786

unwrappedfunc.func_globals,

787

unwrappedfunc.func_name,

788

unwrappedfunc.func_defaults,

789

unwrappedfunc.func_closure)

790

new_dbusfunc = dbus.service.signal(

791

new_interface, old_dbusobj._dbus_signature)(newfunc)

792

attr["_transitional_{0}_1".format(key)] = new_dbusfunc

793

attr["_transitional_{0}_0".format(key)] = old_dbusobj

794

def fixscope(func1, func2):

795

def newcall(*args, **kwargs):

796

func1(*args, **kwargs)

797

func2(*args, **kwargs)

798

return newcall

799

800

attr[key] = fixscope(

801

old_dbusobj, attr["_transitional_{0}_1".format(key)])

802

803

if getattr(old_dbusobj, "_dbus_is_method", False):

804

new_dbusfunc = (dbus.service.method

805

(new_interface,

806

old_dbusobj._dbus_in_signature,

807

old_dbusobj._dbus_out_signature)

808

(types.FunctionType

809

(old_dbusobj.func_code,

810

old_dbusobj.func_globals,

811

old_dbusobj.func_name,

812

old_dbusobj.func_defaults,

813

old_dbusobj.func_closure)))

814

815

attr["_transitional_{0}".format(key)] = new_dbusfunc

816

if getattr(old_dbusobj, "_dbus_is_property", False):

817

new_dbusfunc = (dbus_service_property

818

(new_interface,

819

old_dbusobj._dbus_signature,

820

old_dbusobj._dbus_access,

821

old_dbusobj._dbus_get_args_options["byte_arrays"])

822

(types.FunctionType

823

(old_dbusobj.func_code,

824

old_dbusobj.func_globals,

825

old_dbusobj.func_name,

826

old_dbusobj.func_defaults,

827

old_dbusobj.func_closure)))

828

829

attr["_transitional_{0}".format(key)] = new_dbusfunc

830

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

831

1061

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

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

1064

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

1065

interface names according to the "alt_interface_names" mapping.

1066

Usage:

1067

1068

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

1069

"net.example.AlternateInterface"})

1070

class SampleDBusObject(dbus.service.Object):

1071

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

1072

def SampleDBusMethod():

1073

pass

1074

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1076

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

1077

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

1078

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

1079

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

1080

1081

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

1082

(from DBusObjectWithProperties) and interfaces (from the

1083

dbus_interface_annotations decorator).

1084

"""

1085

def wrapper(cls):

1086

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1088

attr = {}

1089

interface_names = set()

1090

# Go though all attributes of the class

1091

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

1092

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

1093

# with the wrong interface name

1094

if (not hasattr(attribute, "_dbus_interface")

1095

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

1097

continue

1098

# Create an alternate D-Bus interface name based on

1099

# the current name

1100

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

1104

# Is this a D-Bus signal?

1105

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

1108

nonmethod_func = (dict(

1109

zip(attribute.func_code.co_freevars,

1110

attribute.__closure__))["func"]

1111

.cell_contents)

1112

# Create a new, but exactly alike, function

1113

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

1114

# with the alternate D-Bus interface name

1115

new_function = (dbus.service.signal

1116

(alt_interface,

1117

attribute._dbus_signature)

1118

(types.FunctionType(

1119

nonmethod_func.func_code,

1120

nonmethod_func.func_globals,

1121

nonmethod_func.func_name,

1122

nonmethod_func.func_defaults,

1123

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

1134

def fixscope(func1, func2):

1135

"""This function is a scope container to pass

1136

func1 and func2 to the "call_both" function

1137

outside of its arguments"""

1138

def call_both(*args, **kwargs):

1139

"""This function will emit two D-Bus

1140

signals by calling func1 and func2"""

1141

func1(*args, **kwargs)

1142

func2(*args, **kwargs)

1143

return call_both

1144

# Create the "call_both" function and add it to

1145

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

1147

# Is this a D-Bus method?

1148

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

1149

# Create a new, but exactly alike, function

1150

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

1151

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

1152

# to the class.

1153

attr[attrname] = (dbus.service.method

1154

(alt_interface,

1155

attribute._dbus_in_signature,

1156

attribute._dbus_out_signature)

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus property?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

# property with the alternate D-Bus interface

1174

# name. Add it to the class.

1175

attr[attrname] = (dbus_service_property

1176

(alt_interface,

1177

attribute._dbus_signature,

1178

attribute._dbus_access,

1179

attribute

1180

._dbus_get_args_options

1181

["byte_arrays"])

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

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

1196

# Create a new, but exactly alike, function

1197

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

1198

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

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

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

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

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

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

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

1232

"se.bsnet.fukt.Mandos"})

832

1233

class ClientDBus(Client, DBusObjectWithProperties):

833

1234

"""A Client class using D-Bus

834

1235

839

1240

840

1241

runtime_expansions = (Client.runtime_expansions

841

1242

+ ("dbus_object_path",))

842

843

__metaclass__ = transitional_clientdbus

844

1243

845

1244

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

846

1245

847

1246

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

848

self._approvals_pending = 0

849

1247

self.bus = bus

850

1248

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

851

1249

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

857

1255

("/clients/" + client_object_name))

858

1256

DBusObjectWithProperties.__init__(self, self.bus,

859

1257

self.dbus_object_path)

860

1258

861

1259

def notifychangeproperty(transform_func,

862

1260

dbus_name, type_func=lambda x: x,

863

1261

variant_level=1):

864

""" Modify a variable so that its a property that announce its

865

changes to DBus.

866

transform_fun: Function that takes a value and transform it to

867

DBus type.

868

dbus_name: DBus name of the variable

1262

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

1263

its changes to DBus.

1264

1265

transform_fun: Function that takes a value and a variant_level

1266

and transforms it to a D-Bus type.

1267

dbus_name: D-Bus name of the variable

869

1268

type_func: Function that transform the value before sending it

870

to DBus

871

variant_level: DBus variant level. default: 1

1269

to the D-Bus. Default: no transform

1270

variant_level: D-Bus variant level. Default: 1

872

1271

"""

873

real_value = [None,]

1272

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

874

1273

def setter(self, value):

875

old_value = real_value[0]

876

real_value[0] = value

877

1274

if hasattr(self, "dbus_object_path"):

878

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

879

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

880

variant_level)

1275

if (not hasattr(self, attrname) or

1276

type_func(getattr(self, attrname, None))

1277

!= type_func(value)):

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

881

1281

self.PropertyChanged(dbus.String(dbus_name),

882

1282

dbus_value)

1283

setattr(self, attrname, value)

883

1284

884

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

885

1285

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

886

1286

887

1287

expires = notifychangeproperty(datetime_to_dbus, "Expires")

888

1288

approvals_pending = notifychangeproperty(dbus.Boolean,

892

1292

last_enabled = notifychangeproperty(datetime_to_dbus,

893

1293

"LastEnabled")

894

1294

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

895

type_func = lambda checker: checker is not None)

1295

type_func = lambda checker:

1296

checker is not None)

896

1297

last_checked_ok = notifychangeproperty(datetime_to_dbus,

897

1298

"LastCheckedOK")

898

last_approval_request = notifychangeproperty(datetime_to_dbus,

899

"LastApprovalRequest")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

last_approval_request = notifychangeproperty(

1302

datetime_to_dbus, "LastApprovalRequest")

900

1303

approved_by_default = notifychangeproperty(dbus.Boolean,

901

1304

"ApprovedByDefault")

902

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

903

type_func = _timedelta_to_milliseconds)

904

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

905

type_func = _timedelta_to_milliseconds)

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1306

"ApprovalDelay",

1307

type_func =

1308

timedelta_to_milliseconds)

1309

approval_duration = notifychangeproperty(

1310

dbus.UInt64, "ApprovalDuration",

1311

type_func = timedelta_to_milliseconds)

906

1312

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

907

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

908

type_func = _timedelta_to_milliseconds)

909

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

910

type_func = _timedelta_to_milliseconds)

911

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

912

type_func = _timedelta_to_milliseconds)

1313

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

1314

type_func =

1315

timedelta_to_milliseconds)

1316

extended_timeout = notifychangeproperty(

1317

dbus.UInt64, "ExtendedTimeout",

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1320

"Interval",

1321

type_func =

1322

timedelta_to_milliseconds)

913

1323

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

914

1324

915

1325

del notifychangeproperty

943

1353

*args, **kwargs)

944

1354

945

1355

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

946

old_checker = self.checker

947

if self.checker is not None:

948

old_checker_pid = self.checker.pid

949

else:

950

old_checker_pid = None

1356

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

951

1357

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

952

1358

# Only if new checker process was started

953

1359

if (self.checker is not None

957

1363

return r

958

1364

959

1365

def _reset_approved(self):

960

self._approved = None

1366

self.approved = None

961

1367

return False

962

1368

963

1369

def approve(self, value=True):

964

self.send_changedstate()

965

self._approved = value

966

gobject.timeout_add(_timedelta_to_milliseconds

1370

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

967

1372

(self.approval_duration),

968

1373

self._reset_approved)

969

1374

self.send_changedstate()

970

1375

971

1376

## D-Bus methods, signals & properties

972

_interface = "se.bsnet.fukt.Mandos.Client"

973

1377

_interface = "se.recompile.Mandos.Client"

1378

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

974

1386

## Signals

975

1387

976

1388

# CheckerCompleted - signal

1075

1487

access="readwrite")

1076

1488

def ApprovalDuration_dbus_property(self, value=None):

1077

1489

if value is None: # get

1078

return dbus.UInt64(_timedelta_to_milliseconds(

1490

return dbus.UInt64(timedelta_to_milliseconds(

1079

1491

self.approval_duration))

1080

1492

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

1081

1493

1095

1507

def Host_dbus_property(self, value=None):

1096

1508

if value is None: # get

1097

1509

return dbus.String(self.host)

1098

self.host = value

1510

self.host = unicode(value)

1099

1511

1100

1512

# Created - property

1101

1513

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

1102

1514

def Created_dbus_property(self):

1103

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

1515

return datetime_to_dbus(self.created)

1104

1516

1105

1517

# LastEnabled - property

1106

1518

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

1127

1539

return

1128

1540

return datetime_to_dbus(self.last_checked_ok)

1129

1541

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1130

1548

# Expires - property

1131

1549

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

1132

1550

def Expires_dbus_property(self):

1143

1561

def Timeout_dbus_property(self, value=None):

1144

1562

if value is None: # get

1145

1563

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1146

1565

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

1147

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

1148

return

1149

# Reschedule timeout

1150

gobject.source_remove(self.disable_initiator_tag)

1151

self.disable_initiator_tag = None

1152

self.expires = None

1153

time_to_die = (self.

1154

_timedelta_to_milliseconds((self

1155

.last_checked_ok

1156

+ self.timeout)

1157

- datetime.datetime

1158

.utcnow()))

1159

if time_to_die <= 0:

1160

# The timeout has passed

1161

self.disable()

1162

else:

1163

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

1164

+ datetime.timedelta(milliseconds = time_to_die))

1165

self.disable_initiator_tag = (gobject.timeout_add

1166

(time_to_die, self.disable))

1566

# Reschedule disabling

1567

if self.enabled:

1568

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1571

# The timeout has passed

1572

self.disable()

1573

else:

1574

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

1575

is None):

1576

return

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1167

1582

1168

1583

# ExtendedTimeout - property

1169

1584

@dbus_service_property(_interface, signature="t",

1182

1597

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

1183

1598

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

1184

1599

return

1185

# Reschedule checker run

1186

gobject.source_remove(self.checker_initiator_tag)

1187

self.checker_initiator_tag = (gobject.timeout_add

1188

(value, self.start_checker))

1189

self.start_checker() # Start one now, too

1600

if self.enabled:

1601

# Reschedule checker run

1602

gobject.source_remove(self.checker_initiator_tag)

1603

self.checker_initiator_tag = (gobject.timeout_add

1604

(value, self.start_checker))

1605

self.start_checker() # Start one now, too

1190

1606

1191

1607

# Checker - property

1192

1608

@dbus_service_property(_interface, signature="s",

1194

1610

def Checker_dbus_property(self, value=None):

1195

1611

if value is None: # get

1196

1612

return dbus.String(self.checker_command)

1197

self.checker_command = value

1613

self.checker_command = unicode(value)

1198

1614

1199

1615

# CheckerRunning - property

1200

1616

@dbus_service_property(_interface, signature="b",

1229

1645

raise KeyError()

1230

1646

1231

1647

def __getattribute__(self, name):

1232

if(name == '_pipe'):

1648

if name == '_pipe':

1233

1649

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

1234

1650

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

1235

1651

data = self._pipe.recv()

1242

1658

return func

1243

1659

1244

1660

def __setattr__(self, name, value):

1245

if(name == '_pipe'):

1661

if name == '_pipe':

1246

1662

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

1247

1663

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

1248

1664

1288

1704

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

1289

1705

try:

1290

1706

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

1291

raise RuntimeError

1707

raise RuntimeError(line)

1292

1708

except (ValueError, IndexError, RuntimeError) as error:

1293

1709

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

1294

1710

return

1331

1747

client.name)

1332

1748

if self.server.use_dbus:

1333

1749

# Emit D-Bus signal

1334

client.Rejected("Disabled")

1750

client.Rejected("Disabled")

1335

1751

return

1336

1752

1337

if client._approved or not client.approval_delay:

1753

if client.approved or not client.approval_delay:

1338

1754

#We are approved or approval is disabled

1339

1755

break

1340

elif client._approved is None:

1756

elif client.approved is None:

1341

1757

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

1342

1758

client.name)

1343

1759

if self.server.use_dbus:

1354

1770

return

1355

1771

1356

1772

#wait until timeout or approved

1357

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

1358

1773

time = datetime.datetime.now()

1359

1774

client.changedstate.acquire()

1360

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

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1361

1778

client.changedstate.release()

1362

1779

time2 = datetime.datetime.now()

1363

1780

if (time2 - time) >= delay:

1379

1796

try:

1380

1797

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

1381

1798

except gnutls.errors.GNUTLSError as error:

1382

logger.warning("gnutls send failed")

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1383

1801

return

1384

1802

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

1385

1803

sent, len(client.secret)

1387

1805

sent_size += sent

1388

1806

1389

1807

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

1390

# bump the timeout as if seen

1391

client.checked_ok(client.extended_timeout)

1808

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1392

1810

if self.server.use_dbus:

1393

1811

# Emit D-Bus signal

1394

1812

client.GotSecret()

1399

1817

try:

1400

1818

session.bye()

1401

1819

except gnutls.errors.GNUTLSError as error:

1402

logger.warning("GnuTLS bye failed")

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1403

1822

1404

1823

@staticmethod

1405

1824

def peer_certificate(session):

1461

1880

# Convert the buffer to a Python bytestring

1462

1881

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

1463

1882

# Convert the bytestring to hexadecimal notation

1464

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

1883

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

1465

1884

return hex_fpr

1466

1885

1467

1886

1470

1889

def sub_process_main(self, request, address):

1471

1890

try:

1472

1891

self.finish_request(request, address)

1473

except:

1892

except Exception:

1474

1893

self.handle_error(request, address)

1475

1894

self.close_request(request)

1476

1895

1477

1896

def process_request(self, request, address):

1478

1897

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

1479

multiprocessing.Process(target = self.sub_process_main,

1480

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

1898

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

1899

args = (request, address))

1900

proc.start()

1901

return proc

1481

1902

1482

1903

1483

1904

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1489

1910

"""

1490

1911

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1491

1912

1492

super(MultiprocessingMixInWithPipe,

1493

self).process_request(request, client_address)

1913

proc = MultiprocessingMixIn.process_request(self, request,

1914

client_address)

1494

1915

self.child_pipe.close()

1495

self.add_pipe(parent_pipe)

1916

self.add_pipe(parent_pipe, proc)

1496

1917

1497

def add_pipe(self, parent_pipe):

1918

def add_pipe(self, parent_pipe, proc):

1498

1919

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

1499

raise NotImplementedError

1920

raise NotImplementedError()

1500

1921

1501

1922

1502

1923

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1509

1930

use_ipv6: Boolean; to use IPv6 or not

1510

1931

"""

1511

1932

def __init__(self, server_address, RequestHandlerClass,

1512

interface=None, use_ipv6=True):

1933

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

1934

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

1935

creating a new one with socket.socket().

1936

"""

1513

1937

self.interface = interface

1514

1938

if use_ipv6:

1515

1939

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

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

1946

#

1947

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

1948

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

1949

# patching socket.socket.)

1950

#

1951

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

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

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

1959

# saved file descriptor.

1960

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

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

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

1965

# socket_wrapper(), if socketfd was set.

1516

1966

socketserver.TCPServer.__init__(self, server_address,

1517

1967

RequestHandlerClass)

1968

1518

1969

def server_bind(self):

1519

1970

"""This overrides the normal server_bind() function

1520

1971

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

1528

1979

try:

1529

1980

self.socket.setsockopt(socket.SOL_SOCKET,

1530

1981

SO_BINDTODEVICE,

1531

str(self.interface

1532

+ '\0'))

1982

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

1533

1983

except socket.error as error:

1534

if error[0] == errno.EPERM:

1535

logger.error("No permission to"

1536

" bind to interface %s",

1537

self.interface)

1538

elif error[0] == errno.ENOPROTOOPT:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1539

1988

logger.error("SO_BINDTODEVICE not available;"

1540

1989

" cannot bind to interface %s",

1541

1990

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1542

1994

else:

1543

1995

raise

1544

1996

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

1547

1999

if self.address_family == socket.AF_INET6:

1548

2000

any_address = "::" # in6addr_any

1549

2001

else:

1550

any_address = socket.INADDR_ANY

2002

any_address = "0.0.0.0" # INADDR_ANY

1551

2003

self.server_address = (any_address,

1552

2004

self.server_address[1])

1553

2005

elif not self.server_address[1]:

1574

2026

"""

1575

2027

def __init__(self, server_address, RequestHandlerClass,

1576

2028

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

1577

gnutls_priority=None, use_dbus=True):

2029

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

1578

2030

self.enabled = False

1579

2031

self.clients = clients

1580

2032

if self.clients is None:

1581

self.clients = set()

2033

self.clients = {}

1582

2034

self.use_dbus = use_dbus

1583

2035

self.gnutls_priority = gnutls_priority

1584

2036

IPv6_TCPServer.__init__(self, server_address,

1585

2037

RequestHandlerClass,

1586

2038

interface = interface,

1587

use_ipv6 = use_ipv6)

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1588

2041

def server_activate(self):

1589

2042

if self.enabled:

1590

2043

return socketserver.TCPServer.server_activate(self)

2044

1591

2045

def enable(self):

1592

2046

self.enabled = True

1593

def add_pipe(self, parent_pipe):

2047

2048

def add_pipe(self, parent_pipe, proc):

1594

2049

# Call "handle_ipc" for both data and EOF events

1595

2050

gobject.io_add_watch(parent_pipe.fileno(),

1596

2051

gobject.IO_IN | gobject.IO_HUP,

1597

2052

functools.partial(self.handle_ipc,

1598

parent_pipe = parent_pipe))

1599

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2056

1600

2057

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

1601

client_object=None):

1602

condition_names = {

1603

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

1604

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

1605

# blocking).

1606

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

1607

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

1608

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

1609

# broken, usually for pipes and

1610

# sockets).

1611

}

1612

conditions_string = ' | '.join(name

1613

for cond, name in

1614

condition_names.iteritems()

1615

if cond & condition)

1616

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

1617

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

2058

proc = None, client_object=None):

2059

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

2060

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

2061

# Wait for other process to exit

2062

proc.join()

1618

2063

return False

1619

2064

1620

2065

# Read a request from the child

1625

2070

fpr = request[1]

1626

2071

address = request[2]

1627

2072

1628

for c in self.clients:

2073

for c in self.clients.itervalues():

1629

2074

if c.fingerprint == fpr:

1630

2075

client = c

1631

2076

break

1634

2079

"dress: %s", fpr, address)

1635

2080

if self.use_dbus:

1636

2081

# Emit D-Bus signal

1637

mandos_dbus_service.ClientNotFound(fpr, address[0])

2082

mandos_dbus_service.ClientNotFound(fpr,

2083

address[0])

1638

2084

parent_pipe.send(False)

1639

2085

return False

1640

2086

1641

2087

gobject.io_add_watch(parent_pipe.fileno(),

1642

2088

gobject.IO_IN | gobject.IO_HUP,

1643

2089

functools.partial(self.handle_ipc,

1644

parent_pipe = parent_pipe,

1645

client_object = client))

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

1646

2095

parent_pipe.send(True)

1647

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

2096

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

2097

# same fileno

1648

2098

return False

1649

2099

if command == 'funcall':

1650

2100

funcname = request[1]

1651

2101

args = request[2]

1652

2102

kwargs = request[3]

1653

2103

1654

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

2104

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

2105

funcname)(*args,

2106

**kwargs)))

1655

2107

1656

2108

if command == 'getattr':

1657

2109

attrname = request[1]

1658

2110

if callable(client_object.__getattribute__(attrname)):

1659

2111

parent_pipe.send(('function',))

1660

2112

else:

1661

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

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

1662

2115

1663

2116

if command == 'setattr':

1664

2117

attrname = request[1]

1668

2121

return True

1669

2122

1670

2123

2124

def rfc3339_duration_to_delta(duration):

2125

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

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

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

2145

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

2146

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

2147

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

2148

# avoid excessive use of external libraries.

2149

2150

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

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

2161

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

2162

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

2163

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

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

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

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

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

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

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

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

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

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

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

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

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

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

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

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week)))

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

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

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

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

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

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

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

1671

2223

def string_to_delta(interval):

1672

2224

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

1673

2225

1684

2236

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

1685

2237

datetime.timedelta(0, 330)

1686

2238

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

1687

2245

timevalue = datetime.timedelta(0)

1688

2246

for s in interval.split():

1689

2247

try:

1700

2258

elif suffix == "w":

1701

2259

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

1702

2260

else:

1703

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

1704

except (ValueError, IndexError) as e:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

1705

2264

raise ValueError(*(e.args))

1706

2265

timevalue += delta

1707

2266

return timevalue

1708

2267

1709

2268

1710

def if_nametoindex(interface):

1711

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

1712

1713

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

1714

global if_nametoindex

1715

try:

1716

if_nametoindex = (ctypes.cdll.LoadLibrary

1717

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

1718

.if_nametoindex)

1719

except (OSError, AttributeError):

1720

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

1721

def if_nametoindex(interface):

1722

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

1723

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

1724

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

1725

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1726

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

1727

interface))

1728

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

1729

ifreq[16:20])[0]

1730

return interface_index

1731

return if_nametoindex(interface)

1732

1733

1734

2269

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

1735

2270

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

1736

2271

1744

2279

sys.exit()

1745

2280

if not noclose:

1746

2281

# Close all standard open file descriptors

1747

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

2282

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

1748

2283

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

1749

2284

raise OSError(errno.ENODEV,

1750

"%s not a character device"

1751

% os.path.devnull)

2285

"{0} not a character device"

2286

.format(os.devnull))

1752

2287

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

1753

2288

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

1754

2289

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

1763

2298

1764

2299

parser = argparse.ArgumentParser()

1765

2300

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

1766

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

2301

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

1767

2302

help="show version number and exit")

1768

2303

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

1769

2304

help="Bind to interface IF")

1775

2310

help="Run self-test")

1776

2311

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

1777

2312

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

1778

" to terminal")

2313

" to terminal", default=None)

1779

2314

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

1780

2315

help="Debug level for stdout output")

1781

2316

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

1788

2323

" files")

1789

2324

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

1790

2325

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

1791

" system bus interface")

2326

" system bus interface", default=None)

1792

2327

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

1793

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

2328

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

2329

default=None)

2330

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

2331

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2336

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

2337

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

1794

2344

options = parser.parse_args()

1795

2345

1796

2346

if options.check:

1797

2347

import doctest

1798

doctest.testmod()

1799

sys.exit()

2348

fail_count, test_count = doctest.testmod()

2349

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

1800

2350

1801

2351

# Default values for config file for server-global settings

1802

2352

server_defaults = { "interface": "",

1804

2354

"port": "",

1805

2355

"debug": "False",

1806

2356

"priority":

1807

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

2357

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

1808

2358

"servicename": "Mandos",

1809

2359

"use_dbus": "True",

1810

2360

"use_ipv6": "True",

1811

2361

"debuglevel": "",

2362

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

1812

2367

}

1813

2368

1814

2369

# Parse config file for server-global settings

1819

2374

# Convert the SafeConfigParser object to a dict

1820

2375

server_settings = server_config.defaults()

1821

2376

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

1822

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

2377

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

1823

2378

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

1824

2379

option)

1825

2380

if server_settings["port"]:

1826

2381

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

1827

2382

"port")

2383

if server_settings["socket"]:

2384

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

2385

"socket")

2386

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

2387

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

2388

# happen with a supplied network socket.

2389

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

2390

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

2391

["socket"])

1828

2392

del server_config

1829

2393

1830

2394

# Override the settings from the config file with command line

1831

2395

# options, if set.

1832

2396

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

1833

2397

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

1834

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

2398

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

2399

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

1835

2400

value = getattr(options, option)

1836

2401

if value is not None:

1837

2402

server_settings[option] = value

1840

2405

for option in server_settings.keys():

1841

2406

if type(server_settings[option]) is str:

1842

2407

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

1843

2415

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

1844

2416

1845

2417

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

1846

2418

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

1847

2425

# For convenience

1848

2426

debug = server_settings["debug"]

1849

2427

debuglevel = server_settings["debuglevel"]

1850

2428

use_dbus = server_settings["use_dbus"]

1851

2429

use_ipv6 = server_settings["use_ipv6"]

2430

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

2431

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2435

if debug:

2436

initlogger(debug, logging.DEBUG)

2437

else:

2438

if not debuglevel:

2439

initlogger(debug)

2440

else:

2441

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

2442

initlogger(debug, level)

1852

2443

1853

2444

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

1854

2445

syslogger.setFormatter(logging.Formatter

1855

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

1856

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

1857

% server_settings["servicename"]))

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

1858

2450

1859

2451

# Parse config file with clients

1860

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

1861

"extended_timeout": "15m",

1862

"interval": "2m",

1863

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

1864

"host": "",

1865

"approval_delay": "0s",

1866

"approval_duration": "1s",

1867

}

1868

client_config = configparser.SafeConfigParser(client_defaults)

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

1869

2454

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

1870

2455

"clients.conf"))

1871

2456

1872

2457

global mandos_dbus_service

1873

2458

mandos_dbus_service = None

1874

2459

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

1875

2463

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

1876

2464

server_settings["port"]),

1877

2465

ClientHandler,

1880

2468

use_ipv6=use_ipv6,

1881

2469

gnutls_priority=

1882

2470

server_settings["priority"],

1883

use_dbus=use_dbus)

1884

if not debug:

1885

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

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

1886

2478

try:

1887

2479

pidfile = open(pidfilename, "w")

1888

except IOError:

1889

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

2480

except IOError as e:

2481

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

2482

exc_info=e)

1890

2483

1891

try:

1892

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

1893

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

1894

except KeyError:

2484

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

1895

2485

try:

1896

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

1897

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

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

1898

2489

except KeyError:

1899

try:

1900

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

1901

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

1902

except KeyError:

1903

uid = 65534

1904

gid = 65534

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

1905

2494

try:

1906

2495

os.setgid(gid)

1907

2496

os.setuid(uid)

1908

2497

except OSError as error:

1909

if error[0] != errno.EPERM:

1910

raise error

1911

1912

if not debug and not debuglevel:

1913

syslogger.setLevel(logging.WARNING)

1914

console.setLevel(logging.WARNING)

1915

if debuglevel:

1916

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

1917

syslogger.setLevel(level)

1918

console.setLevel(level)

2498

if error.errno != errno.EPERM:

2499

raise

1919

2500

1920

2501

if debug:

1921

2502

# Enable all possible GnuTLS debugging

1932

2513

.gnutls_global_set_log_function(debug_gnutls))

1933

2514

1934

2515

# Redirect stdin so all checkers get /dev/null

1935

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

2516

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

1936

2517

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

1937

2518

if null > 2:

1938

2519

os.close(null)

1939

else:

1940

# No console logging

1941

logger.removeHandler(console)

1942

2520

1943

2521

# Need to fork before connecting to D-Bus

1944

if not debug:

2522

if not foreground:

1945

2523

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

1946

2524

daemon()

1947

2525

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2529

1948

2530

global main_loop

1949

2531

# From the Avahi example code

1950

DBusGMainLoop(set_as_default=True )

2532

DBusGMainLoop(set_as_default=True)

1951

2533

main_loop = gobject.MainLoop()

1952

2534

bus = dbus.SystemBus()

1953

2535

# End of Avahi example code

1954

2536

if use_dbus:

1955

2537

try:

1956

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

1957

bus, do_not_queue=True)

1958

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1959

bus, do_not_queue=True)

2538

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

2539

bus, do_not_queue=True)

2540

old_bus_name = (dbus.service.BusName

2541

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

2542

do_not_queue=True))

1960

2543

except dbus.exceptions.NameExistsException as e:

1961

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

2544

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

1962

2545

use_dbus = False

1963

2546

server_settings["use_dbus"] = False

1964

2547

tcp_server.use_dbus = False

1965

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1966

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

1967

servicetype = "_mandos._tcp",

1968

protocol = protocol, bus = bus)

1969

if server_settings["interface"]:

1970

service.interface = (if_nametoindex

1971

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

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

1972

2557

1973

2558

global multiprocessing_manager

1974

2559

multiprocessing_manager = multiprocessing.Manager()

1976

2561

client_class = Client

1977

2562

if use_dbus:

1978

2563

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

1979

def client_config_items(config, section):

1980

special_settings = {

1981

"approved_by_default":

1982

lambda: config.getboolean(section,

1983

"approved_by_default"),

1984

}

1985

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

2564

2565

client_settings = Client.config_parser(client_config)

2566

old_client_settings = {}

2567

clients_data = {}

2568

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

# Get client data and settings from last running state.

2578

if server_settings["restore"]:

2579

try:

2580

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

2581

clients_data, old_client_settings = (pickle.load

2582

(stored_state))

2583

os.remove(stored_state_path)

2584

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

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

2587

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

2588

else:

2589

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

2590

exc_info=e)

2591

raise

2592

except EOFError as e:

2593

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

2594

"EOFError:", exc_info=e)

2595

2596

with PGPEngine() as pgp:

2597

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

# Decide which value to use after restoring saved state.

2603

# We have three different values: Old config file,

2604

# new config file, and saved state.

2605

# New config value takes precedence if it differs from old

2606

# config value, otherwise use saved state.

2607

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

2608

try:

2609

# For each value in new config, check if it

2610

# differs from the old config value (Except for

2611

# the "secret" attribute)

2612

if (name != "secret" and

2613

value != old_client_settings[client_name]

2614

[name]):

2615

client[name] = value

2616

except KeyError:

2617

pass

2618

2619

# Clients who has passed its expire date can still be

2620

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2624

if client["enabled"]:

2625

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

2626

if not client["last_checked_ok"]:

2627

logger.warning(

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2631

client["enabled"] = False

2632

elif client["last_checker_status"] != 0:

2633

logger.warning(

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

2638

client["enabled"] = False

2639

else:

2640

client["expires"] = (datetime.datetime

2641

.utcnow()

2642

+ client["timeout"])

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

1986

2646

try:

1987

yield (name, special_settings[name]())

1988

except KeyError:

1989

yield (name, value)

1990

1991

tcp_server.clients.update(set(

1992

client_class(name = section,

1993

config= dict(client_config_items(

1994

client_config, section)))

1995

for section in client_config.sections()))

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

2651

except PGPError:

2652

# If decryption fails, we use secret from new settings

2653

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

2654

.format(client_name))

2655

client["secret"] = (

2656

client_settings[client_name]["secret"])

2657

2658

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

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2661

del clients_data[client_name]

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2664

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2667

for client_name, client in clients_data.iteritems():

2668

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2671

1996

2672

if not tcp_server.clients:

1997

2673

logger.warning("No clients defined")

1998

1999

if not debug:

2000

try:

2001

with pidfile:

2002

pid = os.getpid()

2003

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

2004

del pidfile

2005

except IOError:

2006

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

2007

pidfilename, pid)

2008

except NameError:

2009

# "pidfile" was never created

2010

pass

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

2011

2685

del pidfilename

2012

2013

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

2014

2686

2015

2687

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

2016

2688

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

2017

2689

2018

2690

if use_dbus:

2019

class MandosDBusService(dbus.service.Object):

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

2020

2694

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

2021

2695

def __init__(self):

2022

2696

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

2023

_interface = "se.bsnet.fukt.Mandos"

2697

_interface = "se.recompile.Mandos"

2698

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2024

2704

2025

2705

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

2026

2706

def ClientAdded(self, objpath):

2041

2721

def GetAllClients(self):

2042

2722

"D-Bus method"

2043

2723

return dbus.Array(c.dbus_object_path

2044

for c in tcp_server.clients)

2724

for c in

2725

tcp_server.clients.itervalues())

2045

2726

2046

2727

@dbus.service.method(_interface,

2047

2728

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

2049

2730

"D-Bus method"

2050

2731

return dbus.Dictionary(

2051

2732

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

2052

for c in tcp_server.clients),

2733

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

2053

2734

signature="oa{sv}")

2054

2735

2055

2736

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

2056

2737

def RemoveClient(self, object_path):

2057

2738

"D-Bus method"

2058

for c in tcp_server.clients:

2739

for c in tcp_server.clients.itervalues():

2059

2740

if c.dbus_object_path == object_path:

2060

tcp_server.clients.remove(c)

2741

del tcp_server.clients[c.name]

2061

2742

c.remove_from_connection()

2062

2743

# Don't signal anything except ClientRemoved

2063

2744

c.disable(quiet=True)

2072

2753

2073

2754

def cleanup():

2074

2755

"Cleanup function; run on exit"

2075

service.cleanup()

2076

2756

if zeroconf:

2757

service.cleanup()

2758

2759

multiprocessing.active_children()

2760

wnull.close()

2761

if not (tcp_server.clients or client_settings):

2762

return

2763

2764

# Store client before exiting. Secrets are encrypted with key

2765

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

2766

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

2767

clients = {}

2768

with PGPEngine() as pgp:

2769

for client in tcp_server.clients.itervalues():

2770

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

2771

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

2772

key)

2773

client_dict = {}

2774

2775

# A list of attributes that can not be pickled

2776

# + secret.

2777

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

2778

"checker", "server_settings"))

2779

for name, typ in (inspect.getmembers

2780

(dbus.service.Object)):

2781

exclude.add(name)

2782

2783

client_dict["encrypted_secret"] = (client

2784

.encrypted_secret)

2785

for attr in client.client_structure:

2786

if attr not in exclude:

2787

client_dict[attr] = getattr(client, attr)

2788

2789

clients[client.name] = client_dict

2790

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

2791

2792

try:

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2797

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

2798

tempname=stored_state.name

2799

os.rename(tempname, stored_state_path)

2800

except (IOError, OSError) as e:

2801

if not debug:

2802

try:

2803

os.remove(tempname)

2804

except NameError:

2805

pass

2806

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

2807

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

2808

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

2809

else:

2810

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

2811

exc_info=e)

2812

raise

2813

2814

# Delete all clients, and settings from config

2077

2815

while tcp_server.clients:

2078

client = tcp_server.clients.pop()

2816

name, client = tcp_server.clients.popitem()

2079

2817

if use_dbus:

2080

2818

client.remove_from_connection()

2081

client.disable_hook = None

2082

2819

# Don't signal anything except ClientRemoved

2083

2820

client.disable(quiet=True)

2084

2821

if use_dbus:

2085

2822

# Emit D-Bus signal

2086

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2823

mandos_dbus_service.ClientRemoved(client

2824

.dbus_object_path,

2087

2825

client.name)

2826

client_settings.clear()

2088

2827

2089

2828

atexit.register(cleanup)

2090

2829

2091

for client in tcp_server.clients:

2830

for client in tcp_server.clients.itervalues():

2092

2831

if use_dbus:

2093

2832

# Emit D-Bus signal

2094

2833

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2095

client.enable()

2834

# Need to initiate checking of clients

2835

if client.enabled:

2836

client.init_checker()

2096

2837

2097

2838

tcp_server.enable()

2098

2839

tcp_server.server_activate()

2099

2840

2100

2841

# Find out what port we got

2101

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

2842

if zeroconf:

2843

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

2102

2844

if use_ipv6:

2103

2845

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

2104

" flowinfo %d, scope_id %d"

2105

% tcp_server.socket.getsockname())

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2106

2848

else: # IPv4

2107

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

2108

% tcp_server.socket.getsockname())

2849

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

2850

*tcp_server.socket.getsockname())

2109

2851

2110

2852

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

2111

2853

2112

2854

try:

2113

# From the Avahi example code

2114

try:

2115

service.activate()

2116

except dbus.exceptions.DBusException as error:

2117

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

2118

cleanup()

2119

sys.exit(1)

2120

# End of Avahi example code

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2121

2864

2122

2865

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

2123

2866

lambda *args, **kwargs:

2127

2870

logger.debug("Starting main loop")

2128

2871

main_loop.run()

2129

2872

except AvahiError as error:

2130

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

2873

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

2131

2874

cleanup()

2132

2875

sys.exit(1)

2133

2876

except KeyboardInterrupt:

2138

2881

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

2139

2882

cleanup()

2140

2883

2141

2142

2884

if __name__ == '__main__':

2143

2885

main()