/mandos/trunk : revision 24.1.174

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

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#

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# Everything else is

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#

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

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

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# 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@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.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 functools

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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 = "1.6.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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

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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

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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server.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("D-Bus Exception", exc_info=error)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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: {0!s}"

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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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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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_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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last_enabled: datetime.datetime(); (UTC)

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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 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", "expires",

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "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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@staticmethod

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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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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.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 self._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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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return self._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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self.name = name

532

if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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

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

555

datetime.datetime.utcnow())

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# attributes specific for this server instance

340

if "secret" in config:

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

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elif "secfile" in config:

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

344

(config["secfile"])),

345

"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

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self.enabled = False

353

self.last_approval_request = None

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self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

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self.checker = None

559

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self.checker_initiator_tag = None

560

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self.disable_initiator_tag = None

561

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

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self.current_checker_command = None

563

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

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True)

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self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

570

if not attr.startswith("_")]

571

self.client_structure.append("client_structure")

572

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

574

lambda obj:

575

isinstance(obj,

576

property)):

577

if not name.startswith("_"):

578

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

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config["approval_duration"])

374

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

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# Send notice to process children that client state has changed

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def send_changedstate(self):

582

with self.changedstate:

583

self.changedstate.notify_all()

584

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

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def enable(self):

586

382

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

587

383

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

588

384

# Already enabled

589

385

return

590

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

591

self.enabled = True

386

self.send_changedstate()

592

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self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

594

self.send_changedstate()

595

596

def disable(self, quiet=True):

597

"""Disable this client."""

598

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

599

return False

600

if not quiet:

601

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

602

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

603

gobject.source_remove(self.disable_initiator_tag)

604

self.disable_initiator_tag = None

605

self.expires = None

606

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

607

gobject.source_remove(self.checker_initiator_tag)

608

self.checker_initiator_tag = None

609

self.stop_checker()

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

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

614

return False

615

616

def __del__(self):

617

self.disable()

618

619

def init_checker(self):

620

388

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

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389

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

390

self.checker_initiator_tag = (gobject.timeout_add

625

391

(self.interval_milliseconds(),

626

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self.start_checker))

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

394

self.disable_initiator_tag = (gobject.timeout_add

631

395

(self.timeout_milliseconds(),

632

396

self.disable))

397

self.enabled = True

633

398

# Also start a new checker *right now*.

634

399

self.start_checker()

635

400

401

def disable(self, quiet=True):

402

"""Disable this client."""

403

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

404

return False

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

411

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

414

self.checker_initiator_tag = None

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

self.enabled = False

419

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

420

return False

421

422

def __del__(self):

423

self.disable_hook = None

424

self.disable()

425

636

426

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

637

427

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

638

428

self.checker_callback_tag = None

639

429

self.checker = None

640

430

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

643

433

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

644

434

vars(self))

645

435

self.checked_ok()

647

437

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

648

438

vars(self))

649

439

else:

650

self.last_checker_status = -1

651

440

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

652

441

vars(self))

653

442

654

443

def checked_ok(self):

655

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

656

449

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

662

if timeout is None:

663

timeout = self.timeout

664

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

671

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

672

454

673

455

def need_approval(self):

674

456

self.last_approval_request = datetime.datetime.utcnow()

679

461

If a checker already exists, leave it running and do

680

462

nothing."""

681

463

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

686

468

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

687

469

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

688

470

# should be.

702

484

self.current_checker_command)

703

485

# Start a new checker if needed

704

486

if self.checker is None:

705

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

710

487

try:

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

716

506

self.current_checker_command = command

717

507

try:

718

508

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

721

511

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

722

512

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

723

513

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

514

self.checker = subprocess.Popen(command,

733

515

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

747

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

748

527

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

528

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

529

error)

758

530

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

759

531

return True

760

532

767

539

return

768

540

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

769

541

try:

770

self.checker.terminate()

542

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

771

543

#time.sleep(0.5)

772

544

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

773

# self.checker.kill()

545

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

774

546

except OSError as error:

775

547

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

776

548

raise

777

549

self.checker = None

778

550

779

780

551

def dbus_service_property(dbus_interface, signature="v",

781

552

access="readwrite", byte_arrays=False):

782

553

"""Decorators for marking methods of a DBusObjectWithProperties to

793

564

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

794

565

if byte_arrays and signature != "ay":

795

566

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

796

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

567

" signature %r" % signature)

797

568

def decorator(func):

798

569

func._dbus_is_property = True

799

570

func._dbus_interface = dbus_interface

807

578

return decorator

808

579

809

580

810

def dbus_interface_annotations(dbus_interface):

811

"""Decorator for marking functions returning interface annotations

812

813

Usage:

814

815

@dbus_interface_annotations("org.example.Interface")

816

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

817

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

818

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

819

"false"}

820

"""

821

def decorator(func):

822

func._dbus_is_interface = True

823

func._dbus_interface = dbus_interface

824

func._dbus_name = dbus_interface

825

return func

826

return decorator

827

828

829

def dbus_annotations(annotations):

830

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

831

Usage:

832

833

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

834

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

def Property_dbus_property(self):

839

return dbus.Boolean(False)

840

"""

841

def decorator(func):

842

func._dbus_annotations = annotations

843

return func

844

return decorator

845

846

847

581

class DBusPropertyException(dbus.exceptions.DBusException):

848

582

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

849

583

"""

865

599

866

600

class DBusObjectWithProperties(dbus.service.Object):

867

601

"""A D-Bus object with properties.

868

602

869

603

Classes inheriting from this can use the dbus_service_property

870

604

decorator to expose methods as D-Bus properties. It exposes the

871

605

standard Get(), Set(), and GetAll() methods on the D-Bus.

872

606

"""

873

607

874

608

@staticmethod

875

def _is_dbus_thing(thing):

876

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

877

878

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

879

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

880

"""

881

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

882

False)

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

883

611

884

def _get_all_dbus_things(self, thing):

612

def _get_all_dbus_properties(self):

885

613

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

886

614

"""

887

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

888

name),

889

athing.__get__(self))

890

for cls in self.__class__.__mro__

891

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

894

618

895

619

def _get_dbus_property(self, interface_name, property_name):

896

620

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

897

621

property with the specified name and interface.

898

622

"""

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

903

if (value._dbus_name == property_name

904

and value._dbus_interface == interface_name):

905

return value.__get__(self)

906

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

907

633

# No such property

908

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

635

+ interface_name + "."

934

660

# signatures other than "ay".

935

661

if prop._dbus_signature != "ay":

936

662

raise ValueError

937

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

938

for byte in value))

663

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

664

for byte in value))

939

665

prop(value)

940

666

941

667

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

943

669

def GetAll(self, interface_name):

944

670

"""Standard D-Bus property GetAll() method, see D-Bus

945

671

standard.

946

672

947

673

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

948

674

"""

949

properties = {}

950

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

951

677

if (interface_name

952

678

and interface_name != prop._dbus_interface):

953

679

# Interface non-empty but did not match

957

683

continue

958

684

value = prop()

959

685

if not hasattr(value, "variant_level"):

960

properties[name] = value

686

all[name] = value

961

687

continue

962

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

963

value.variant_level+1)

964

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

688

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

689

value.variant_level+1)

690

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

965

691

966

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

693

out_signature="s",

968

694

path_keyword='object_path',

969

695

connection_keyword='connection')

970

696

def Introspect(self, object_path, connection):

971

"""Overloading of standard D-Bus method.

972

973

Inserts property tags and interface annotation tags.

697

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

974

698

"""

975

699

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

976

700

connection)

983

707

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

984

708

return e

985

709

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

986

# Add property tags

987

710

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

988

711

for name, prop

989

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

990

713

if prop._dbus_interface

991

714

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

992

715

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1024

716

# Add the names to the return values for the

1025

717

# "org.freedesktop.DBus.Properties" methods

1026

718

if (if_tag.getAttribute("name")

1041

733

except (AttributeError, xml.dom.DOMException,

1042

734

xml.parsers.expat.ExpatError) as error:

1043

735

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

1044

exc_info=error)

736

error)

1045

737

return xmlstring

1046

738

1047

739

1048

def datetime_to_dbus(dt, variant_level=0):

1049

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

1050

if dt is None:

1051

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1054

1055

1056

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

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

1058

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

1059

interface names according to the "alt_interface_names" mapping.

1060

Usage:

1061

1062

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

1063

"net.example.AlternateInterface"})

1064

class SampleDBusObject(dbus.service.Object):

1065

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

1066

def SampleDBusMethod():

1067

pass

1068

1069

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

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

1071

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

1072

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

1073

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

1074

1075

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

1076

(from DBusObjectWithProperties) and interfaces (from the

1077

dbus_interface_annotations decorator).

1078

"""

1079

def wrapper(cls):

1080

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1082

attr = {}

1083

interface_names = set()

1084

# Go though all attributes of the class

1085

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

1086

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

1087

# with the wrong interface name

1088

if (not hasattr(attribute, "_dbus_interface")

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1091

continue

1092

# Create an alternate D-Bus interface name based on

1093

# the current name

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1097

interface_names.add(alt_interface)

1098

# Is this a D-Bus signal?

1099

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

1100

# Extract the original non-method undecorated

1101

# function by black magic

1102

nonmethod_func = (dict(

1103

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))["func"]

1105

.cell_contents)

1106

# Create a new, but exactly alike, function

1107

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

1108

# with the alternate D-Bus interface name

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1122

except AttributeError:

1123

pass

1124

# Define a creator of a function to call both the

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

1128

def fixscope(func1, func2):

1129

"""This function is a scope container to pass

1130

func1 and func2 to the "call_both" function

1131

outside of its arguments"""

1132

def call_both(*args, **kwargs):

1133

"""This function will emit two D-Bus

1134

signals by calling func1 and func2"""

1135

func1(*args, **kwargs)

1136

func2(*args, **kwargs)

1137

return call_both

1138

# Create the "call_both" function and add it to

1139

# the class

1140

attr[attrname] = fixscope(attribute, new_function)

1141

# Is this a D-Bus method?

1142

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

1143

# Create a new, but exactly alike, function

1144

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

1145

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

1146

# to the class.

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

1157

# Copy annotations, if any

1158

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1161

except AttributeError:

1162

pass

1163

# Is this a D-Bus property?

1164

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

1165

# Create a new, but exactly alike, function

1166

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

1167

# property with the alternate D-Bus interface

1168

# name. Add it to the class.

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

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

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1202

if deprecate:

1203

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1205

for interface_name in interface_names:

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1221

return cls

1222

return wrapper

1223

1224

1225

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

1226

"se.bsnet.fukt.Mandos"})

1227

740

class ClientDBus(Client, DBusObjectWithProperties):

1228

741

"""A Client class using D-Bus

1229

742

1238

751

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

1239

752

1240

753

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

754

self._approvals_pending = 0

1241

755

self.bus = bus

1242

756

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

1243

757

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

1249

763

("/clients/" + client_object_name))

1250

764

DBusObjectWithProperties.__init__(self, self.bus,

1251

765

self.dbus_object_path)

1252

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

variant_level=1):

1256

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

1257

its changes to DBus.

1258

1259

transform_fun: Function that takes a value and a variant_level

1260

and transforms it to a D-Bus type.

1261

dbus_name: D-Bus name of the variable

1262

type_func: Function that transform the value before sending it

1263

to the D-Bus. Default: no transform

1264

variant_level: D-Bus variant level. Default: 1

1265

"""

1266

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

1267

def setter(self, value):

1268

if hasattr(self, "dbus_object_path"):

1269

if (not hasattr(self, attrname) or

1270

type_func(getattr(self, attrname, None))

1271

!= type_func(value)):

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1277

setattr(self, attrname, value)

1278

1279

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

1280

1281

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

"ApprovalPending",

1284

type_func = bool)

1285

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1286

last_enabled = notifychangeproperty(datetime_to_dbus,

1287

"LastEnabled")

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1291

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

"LastCheckedOK")

1293

last_checker_status = notifychangeproperty(dbus.Int16,

1294

"LastCheckerStatus")

1295

last_approval_request = notifychangeproperty(

1296

datetime_to_dbus, "LastApprovalRequest")

1297

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1303

approval_duration = notifychangeproperty(

1304

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1306

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1310

extended_timeout = notifychangeproperty(

1311

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

timedelta_to_milliseconds)

1317

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

1318

1319

del notifychangeproperty

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

dbus_bool = dbus.Boolean(bval, variant_level=1)

776

self.PropertyChanged(dbus.String("ApprovalPending"),

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

oldstate = getattr(self, "enabled", False)

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

self.PropertyChanged(dbus.String("Enabled"),

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

oldstate = getattr(self, "enabled", False)

804

r = Client.disable(self, quiet=quiet)

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

self.PropertyChanged(dbus.String("Enabled"),

808

dbus.Boolean(False, variant_level=1))

809

return r

1320

810

1321

811

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

1322

812

try:

1331

821

*args, **kwargs):

1332

822

self.checker_callback_tag = None

1333

823

self.checker = None

824

# Emit D-Bus signal

825

self.PropertyChanged(dbus.String("CheckerRunning"),

826

dbus.Boolean(False, variant_level=1))

1334

827

if os.WIFEXITED(condition):

1335

828

exitstatus = os.WEXITSTATUS(condition)

1336

829

# Emit D-Bus signal

1346

839

return Client.checker_callback(self, pid, condition, command,

1347

840

*args, **kwargs)

1348

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1349

859

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

1350

860

old_checker = self.checker

1351

861

if self.checker is not None:

1358

868

and old_checker_pid != self.checker.pid):

1359

869

# Emit D-Bus signal

1360

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1361

874

return r

1362

875

876

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

877

old_checker = getattr(self, "checker", None)

878

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

879

if (old_checker is not None

880

and getattr(self, "checker", None) is None):

881

self.PropertyChanged(dbus.String("CheckerRunning"),

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1363

885

def _reset_approved(self):

1364

self.approved = None

886

self._approved = None

1365

887

return False

1366

888

1367

889

def approve(self, value=True):

1368

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1370

893

(self.approval_duration),

1371

894

self._reset_approved)

1372

self.send_changedstate()

895

1373

896

1374

897

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

898

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

1383

899

1384

900

## Signals

1385

901

1471

987

if value is None: # get

1472

988

return dbus.Boolean(self.approved_by_default)

1473

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

self.PropertyChanged(dbus.String("ApprovedByDefault"),

992

dbus.Boolean(value, variant_level=1))

1474

993

1475

994

# ApprovalDelay - property

1476

995

@dbus_service_property(_interface, signature="t",

1479

998

if value is None: # get

1480

999

return dbus.UInt64(self.approval_delay_milliseconds())

1481

1000

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

1001

# Emit D-Bus signal

1002

self.PropertyChanged(dbus.String("ApprovalDelay"),

1003

dbus.UInt64(value, variant_level=1))

1482

1004

1483

1005

# ApprovalDuration - property

1484

1006

@dbus_service_property(_interface, signature="t",

1485

1007

access="readwrite")

1486

1008

def ApprovalDuration_dbus_property(self, value=None):

1487

1009

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1489

1011

self.approval_duration))

1490

1012

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

1013

# Emit D-Bus signal

1014

self.PropertyChanged(dbus.String("ApprovalDuration"),

1015

dbus.UInt64(value, variant_level=1))

1491

1016

1492

1017

# Name - property

1493

1018

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

1505

1030

def Host_dbus_property(self, value=None):

1506

1031

if value is None: # get

1507

1032

return dbus.String(self.host)

1508

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

self.PropertyChanged(dbus.String("Host"),

1036

dbus.String(value, variant_level=1))

1509

1037

1510

1038

# Created - property

1511

1039

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

1512

1040

def Created_dbus_property(self):

1513

return datetime_to_dbus(self.created)

1041

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

1514

1042

1515

1043

# LastEnabled - property

1516

1044

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

1517

1045

def LastEnabled_dbus_property(self):

1518

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1519

1049

1520

1050

# Enabled - property

1521

1051

@dbus_service_property(_interface, signature="b",

1535

1065

if value is not None:

1536

1066

self.checked_ok()

1537

1067

return

1538

return datetime_to_dbus(self.last_checked_ok)

1539

1540

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

1543

def LastCheckerStatus_dbus_property(self):

1544

return dbus.Int16(self.last_checker_status)

1545

1546

# Expires - property

1547

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

1548

def Expires_dbus_property(self):

1549

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1550

1072

1551

1073

# LastApprovalRequest - property

1552

1074

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

1553

1075

def LastApprovalRequest_dbus_property(self):

1554

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1555

1081

1556

1082

# Timeout - property

1557

1083

@dbus_service_property(_interface, signature="t",

1559

1085

def Timeout_dbus_property(self, value=None):

1560

1086

if value is None: # get

1561

1087

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1563

1088

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

1564

# Reschedule disabling

1565

if self.enabled:

1566

now = datetime.datetime.utcnow()

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1569

# The timeout has passed

1570

self.disable()

1571

else:

1572

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

1573

is None):

1574

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1580

1581

# ExtendedTimeout - property

1582

@dbus_service_property(_interface, signature="t",

1583

access="readwrite")

1584

def ExtendedTimeout_dbus_property(self, value=None):

1585

if value is None: # get

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

1587

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

1089

# Emit D-Bus signal

1090

self.PropertyChanged(dbus.String("Timeout"),

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1588

1109

1589

1110

# Interval - property

1590

1111

@dbus_service_property(_interface, signature="t",

1593

1114

if value is None: # get

1594

1115

return dbus.UInt64(self.interval_milliseconds())

1595

1116

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

1117

# Emit D-Bus signal

1118

self.PropertyChanged(dbus.String("Interval"),

1119

dbus.UInt64(value, variant_level=1))

1596

1120

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

1597

1121

return

1598

if self.enabled:

1599

# Reschedule checker run

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1604

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1605

1128

# Checker - property

1606

1129

@dbus_service_property(_interface, signature="s",

1607

1130

access="readwrite")

1608

1131

def Checker_dbus_property(self, value=None):

1609

1132

if value is None: # get

1610

1133

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

self.PropertyChanged(dbus.String("Checker"),

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1612

1139

1613

1140

# CheckerRunning - property

1614

1141

@dbus_service_property(_interface, signature="b",

1641

1168

self._pipe.send(('init', fpr, address))

1642

1169

if not self._pipe.recv():

1643

1170

raise KeyError()

1644

1171

1645

1172

def __getattribute__(self, name):

1646

if name == '_pipe':

1173

if(name == '_pipe'):

1647

1174

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

1648

1175

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

1649

1176

data = self._pipe.recv()

1654

1181

self._pipe.send(('funcall', name, args, kwargs))

1655

1182

return self._pipe.recv()[1]

1656

1183

return func

1657

1184

1658

1185

def __setattr__(self, name, value):

1659

if name == '_pipe':

1186

if(name == '_pipe'):

1660

1187

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

1661

1188

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

1662

1189

1673

1200

unicode(self.client_address))

1674

1201

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

1675

1202

self.server.child_pipe.fileno())

1676

1203

1677

1204

session = (gnutls.connection

1678

1205

.ClientSession(self.request,

1679

1206

gnutls.connection

1680

1207

.X509Credentials()))

1681

1208

1682

1209

# Note: gnutls.connection.X509Credentials is really a

1683

1210

# generic GnuTLS certificate credentials object so long as

1684

1211

# no X.509 keys are added to it. Therefore, we can use it

1685

1212

# here despite using OpenPGP certificates.

1686

1213

1687

1214

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1688

1215

# "+AES-256-CBC", "+SHA1",

1689

1216

# "+COMP-NULL", "+CTYPE-OPENPGP",

1695

1222

(gnutls.library.functions

1696

1223

.gnutls_priority_set_direct(session._c_object,

1697

1224

priority, None))

1698

1225

1699

1226

# Start communication using the Mandos protocol

1700

1227

# Get protocol number

1701

1228

line = self.request.makefile().readline()

1706

1233

except (ValueError, IndexError, RuntimeError) as error:

1707

1234

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

1708

1235

return

1709

1236

1710

1237

# Start GnuTLS connection

1711

1238

try:

1712

1239

session.handshake()

1716

1243

# established. Just abandon the request.

1717

1244

return

1718

1245

logger.debug("Handshake succeeded")

1719

1246

1720

1247

approval_required = False

1721

1248

try:

1722

1249

try:

1727

1254

logger.warning("Bad certificate: %s", error)

1728

1255

return

1729

1256

logger.debug("Fingerprint: %s", fpr)

1730

1257

1731

1258

try:

1732

1259

client = ProxyClient(child_pipe, fpr,

1733

1260

self.client_address)

1745

1272

client.name)

1746

1273

if self.server.use_dbus:

1747

1274

# Emit D-Bus signal

1748

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1749

1276

return

1750

1277

1751

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1752

1279

#We are approved or approval is disabled

1753

1280

break

1754

elif client.approved is None:

1281

elif client._approved is None:

1755

1282

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

1756

1283

client.name)

1757

1284

if self.server.use_dbus:

1768

1295

return

1769

1296

1770

1297

#wait until timeout or approved

1298

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

1771

1299

time = datetime.datetime.now()

1772

1300

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1301

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

1776

1302

client.changedstate.release()

1777

1303

time2 = datetime.datetime.now()

1778

1304

if (time2 - time) >= delay:

1794

1320

try:

1795

1321

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

1796

1322

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1323

logger.warning("gnutls send failed")

1799

1324

return

1800

1325

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

1801

1326

sent, len(client.secret)

1802

1327

- (sent_size + sent))

1803

1328

sent_size += sent

1804

1329

1805

1330

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

1806

# bump the timeout using extended_timeout

1807

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1808

1333

if self.server.use_dbus:

1809

1334

# Emit D-Bus signal

1810

1335

client.GotSecret()

1815

1340

try:

1816

1341

session.bye()

1817

1342

except gnutls.errors.GNUTLSError as error:

1818

logger.warning("GnuTLS bye failed",

1819

exc_info=error)

1343

logger.warning("GnuTLS bye failed")

1820

1344

1821

1345

@staticmethod

1822

1346

def peer_certificate(session):

1878

1402

# Convert the buffer to a Python bytestring

1879

1403

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

1880

1404

# Convert the bytestring to hexadecimal notation

1881

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

1405

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

1882

1406

return hex_fpr

1883

1407

1884

1408

1887

1411

def sub_process_main(self, request, address):

1888

1412

try:

1889

1413

self.finish_request(request, address)

1890

except Exception:

1414

except:

1891

1415

self.handle_error(request, address)

1892

1416

self.close_request(request)

1893

1417

1894

1418

def process_request(self, request, address):

1895

1419

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

1896

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

1897

args = (request, address))

1898

proc.start()

1899

return proc

1900

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1901

1422

1902

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1903

1424

""" adds a pipe to the MixIn """

1907

1428

This function creates a new pipe in self.pipe

1908

1429

"""

1909

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1910

1911

proc = MultiprocessingMixIn.process_request(self, request,

1912

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1913

1434

self.child_pipe.close()

1914

self.add_pipe(parent_pipe, proc)

1915

1916

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1917

1438

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

1918

1439

raise NotImplementedError

1919

1440

1920

1921

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1922

1442

socketserver.TCPServer, object):

1923

1443

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1928

1448

use_ipv6: Boolean; to use IPv6 or not

1929

1449

"""

1930

1450

def __init__(self, server_address, RequestHandlerClass,

1931

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

1932

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

1933

creating a new one with socket.socket().

1934

"""

1451

interface=None, use_ipv6=True):

1935

1452

self.interface = interface

1936

1453

if use_ipv6:

1937

1454

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

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

1944

#

1945

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

1946

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

1947

# patching socket.socket.)

1948

#

1949

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

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

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

1957

# saved file descriptor.

1958

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

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

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

1963

# socket_wrapper(), if socketfd was set.

1964

1455

socketserver.TCPServer.__init__(self, server_address,

1965

1456

RequestHandlerClass)

1966

1967

1457

def server_bind(self):

1968

1458

"""This overrides the normal server_bind() function

1969

1459

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

1977

1467

try:

1978

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1979

1469

SO_BINDTODEVICE,

1980

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

1470

str(self.interface

1471

+ '\0'))

1981

1472

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

1986

1478

logger.error("SO_BINDTODEVICE not available;"

1987

1479

" cannot bind to interface %s",

1988

1480

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

1481

else:

1993

1482

raise

1994

1483

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

1997

1486

if self.address_family == socket.AF_INET6:

1998

1487

any_address = "::" # in6addr_any

1999

1488

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

1489

any_address = socket.INADDR_ANY

2001

1490

self.server_address = (any_address,

2002

1491

self.server_address[1])

2003

1492

elif not self.server_address[1]:

2024

1513

"""

2025

1514

def __init__(self, server_address, RequestHandlerClass,

2026

1515

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

2027

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

1516

gnutls_priority=None, use_dbus=True):

2028

1517

self.enabled = False

2029

1518

self.clients = clients

2030

1519

if self.clients is None:

2031

self.clients = {}

1520

self.clients = set()

2032

1521

self.use_dbus = use_dbus

2033

1522

self.gnutls_priority = gnutls_priority

2034

1523

IPv6_TCPServer.__init__(self, server_address,

2035

1524

RequestHandlerClass,

2036

1525

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1526

use_ipv6 = use_ipv6)

2039

1527

def server_activate(self):

2040

1528

if self.enabled:

2041

1529

return socketserver.TCPServer.server_activate(self)

2042

2043

1530

def enable(self):

2044

1531

self.enabled = True

2045

2046

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2047

1533

# Call "handle_ipc" for both data and EOF events

2048

1534

gobject.io_add_watch(parent_pipe.fileno(),

2049

1535

gobject.IO_IN | gobject.IO_HUP,

2050

1536

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2054

1537

parent_pipe = parent_pipe))

1538

2055

1539

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

2056

proc = None, client_object=None):

2057

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

2058

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

2059

# Wait for other process to exit

2060

proc.join()

1540

client_object=None):

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2061

1557

return False

2062

1558

2063

1559

# Read a request from the child

2068

1564

fpr = request[1]

2069

1565

address = request[2]

2070

1566

2071

for c in self.clients.itervalues():

1567

for c in self.clients:

2072

1568

if c.fingerprint == fpr:

2073

1569

client = c

2074

1570

break

2077

1573

"dress: %s", fpr, address)

2078

1574

if self.use_dbus:

2079

1575

# Emit D-Bus signal

2080

mandos_dbus_service.ClientNotFound(fpr,

2081

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2082

1577

parent_pipe.send(False)

2083

1578

return False

2084

1579

2085

1580

gobject.io_add_watch(parent_pipe.fileno(),

2086

1581

gobject.IO_IN | gobject.IO_HUP,

2087

1582

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2093

1585

parent_pipe.send(True)

2094

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

2095

# same fileno

1586

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

2096

1587

return False

2097

1588

if command == 'funcall':

2098

1589

funcname = request[1]

2099

1590

args = request[2]

2100

1591

kwargs = request[3]

2101

1592

2102

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

2103

funcname)(*args,

2104

**kwargs)))

2105

1593

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

1594

2106

1595

if command == 'getattr':

2107

1596

attrname = request[1]

2108

1597

if callable(client_object.__getattribute__(attrname)):

2109

1598

parent_pipe.send(('function',))

2110

1599

else:

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

1600

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

2113

1601

2114

1602

if command == 'setattr':

2115

1603

attrname = request[1]

2116

1604

value = request[2]

2117

1605

setattr(client_object, attrname, value)

2118

1606

2119

1607

return True

2120

1608

2121

1609

2122

def rfc3339_duration_to_delta(duration):

2123

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

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

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

2143

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

2144

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

2145

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

2146

# avoid excessive use of external libraries.

2147

2148

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

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

2159

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

2160

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

2161

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

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

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

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

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

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

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

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

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

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

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

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

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

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

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

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

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

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

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

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

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

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

2221

1610

def string_to_delta(interval):

2222

1611

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

2223

1612

2234

1623

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

2235

1624

datetime.timedelta(0, 330)

2236

1625

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

2243

1626

timevalue = datetime.timedelta(0)

2244

1627

for s in interval.split():

2245

1628

try:

2256

1639

elif suffix == "w":

2257

1640

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

2258

1641

else:

2259

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

2260

.format(suffix))

1642

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

2261

1643

except (ValueError, IndexError) as e:

2262

1644

raise ValueError(*(e.args))

2263

1645

timevalue += delta

2264

1646

return timevalue

2265

1647

2266

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2267

1673

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

2268

1674

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

2269

1675

2277

1683

sys.exit()

2278

1684

if not noclose:

2279

1685

# Close all standard open file descriptors

2280

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

1686

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

2281

1687

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

2282

1688

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2284

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2285

1691

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

2286

1692

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

2287

1693

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

2296

1702

2297

1703

parser = argparse.ArgumentParser()

2298

1704

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

2299

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

1705

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

2300

1706

help="show version number and exit")

2301

1707

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

2302

1708

help="Bind to interface IF")

2308

1714

help="Run self-test")

2309

1715

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

2310

1716

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

2311

" to terminal", default=None)

1717

" to terminal")

2312

1718

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

2313

1719

help="Debug level for stdout output")

2314

1720

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

2321

1727

" files")

2322

1728

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

2323

1729

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

2324

" system bus interface", default=None)

1730

" system bus interface")

2325

1731

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

2326

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

2327

default=None)

2328

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

2329

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

2330

" state", default=None)

2331

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

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

2334

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

2335

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

2336

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

2337

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

2338

1732

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

2339

1733

options = parser.parse_args()

2340

1734

2341

1735

if options.check:

2349

1743

"port": "",

2350

1744

"debug": "False",

2351

1745

"priority":

2352

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

1746

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

2353

1747

"servicename": "Mandos",

2354

1748

"use_dbus": "True",

2355

1749

"use_ipv6": "True",

2356

1750

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

1751

}

2362

1752

2363

1753

# Parse config file for server-global settings

2368

1758

# Convert the SafeConfigParser object to a dict

2369

1759

server_settings = server_config.defaults()

2370

1760

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

2371

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

1761

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

2372

1762

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

2373

1763

option)

2374

1764

if server_settings["port"]:

2375

1765

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

2376

1766

"port")

2377

if server_settings["socket"]:

2378

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

2379

"socket")

2380

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

2381

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

2382

# happen with a supplied network socket.

2383

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

2384

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

2385

["socket"])

2386

1767

del server_config

2387

1768

2388

1769

# Override the settings from the config file with command line

2389

1770

# options, if set.

2390

1771

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

2391

1772

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

2392

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

2393

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

1773

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

2394

1774

value = getattr(options, option)

2395

1775

if value is not None:

2396

1776

server_settings[option] = value

2399

1779

for option in server_settings.keys():

2400

1780

if type(server_settings[option]) is str:

2401

1781

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

2402

# Force all boolean options to be boolean

2403

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

2404

"foreground"):

2405

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

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2409

1782

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

2410

1783

2411

1784

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

2415

1788

debuglevel = server_settings["debuglevel"]

2416

1789

use_dbus = server_settings["use_dbus"]

2417

1790

use_ipv6 = server_settings["use_ipv6"]

2418

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

2419

stored_state_file)

2420

foreground = server_settings["foreground"]

2421

2422

if debug:

2423

initlogger(debug, logging.DEBUG)

2424

else:

2425

if not debuglevel:

2426

initlogger(debug)

2427

else:

2428

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

2429

initlogger(debug, level)

2430

1791

2431

1792

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

2432

1793

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

1794

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

1795

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

1796

% server_settings["servicename"]))

2437

1797

2438

1798

# Parse config file with clients

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2441

1807

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

2442

1808

"clients.conf"))

2443

1809

2452

1818

use_ipv6=use_ipv6,

2453

1819

gnutls_priority=

2454

1820

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

pidfile = None

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2461

1824

try:

2462

1825

pidfile = open(pidfilename, "w")

2463

except IOError as e:

2464

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

2465

exc_info=e)

1826

except IOError:

1827

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

2466

1828

2467

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

1829

try:

1830

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

1831

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

1832

except KeyError:

2468

1833

try:

2469

uid = pwd.getpwnam(name).pw_uid

2470

gid = pwd.getpwnam(name).pw_gid

2471

break

1834

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

1835

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

2472

1836

except KeyError:

2473

continue

2474

else:

2475

uid = 65534

2476

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2477

1843

try:

2478

1844

os.setgid(gid)

2479

1845

os.setuid(uid)

2480

1846

except OSError as error:

2481

if error.errno != errno.EPERM:

1847

if error[0] != errno.EPERM:

2482

1848

raise error

2483

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2484

1858

if debug:

2485

1859

# Enable all possible GnuTLS debugging

2486

1860

2496

1870

.gnutls_global_set_log_function(debug_gnutls))

2497

1871

2498

1872

# Redirect stdin so all checkers get /dev/null

2499

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

1873

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

2500

1874

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

2501

1875

if null > 2:

2502

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2503

1880

2504

1881

# Need to fork before connecting to D-Bus

2505

if not foreground:

1882

if not debug:

2506

1883

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

2507

1884

daemon()

2508

1885

2509

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

2510

# need to inform gobject that threads will be used.

2511

gobject.threads_init()

2512

2513

1886

global main_loop

2514

1887

# From the Avahi example code

2515

DBusGMainLoop(set_as_default=True)

1888

DBusGMainLoop(set_as_default=True )

2516

1889

main_loop = gobject.MainLoop()

2517

1890

bus = dbus.SystemBus()

2518

1891

# End of Avahi example code

2519

1892

if use_dbus:

2520

1893

try:

2521

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

1894

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

2522

1895

bus, do_not_queue=True)

2523

old_bus_name = (dbus.service.BusName

2524

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

2525

do_not_queue=True))

2526

1896

except dbus.exceptions.NameExistsException as e:

2527

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

1897

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

2528

1898

use_dbus = False

2529

1899

server_settings["use_dbus"] = False

2530

1900

tcp_server.use_dbus = False

2531

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2532

service = AvahiServiceToSyslog(name =

2533

server_settings["servicename"],

2534

servicetype = "_mandos._tcp",

2535

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2536

1905

if server_settings["interface"]:

2537

1906

service.interface = (if_nametoindex

2538

1907

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

2543

1912

client_class = Client

2544

1913

if use_dbus:

2545

1914

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

2546

2547

client_settings = Client.config_parser(client_config)

2548

old_client_settings = {}

2549

clients_data = {}

2550

2551

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

2552

global wnull

2553

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

2554

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

2555

# mode

2556

if debug or not foreground:

2557

wnull.close()

2558

2559

# Get client data and settings from last running state.

2560

if server_settings["restore"]:

2561

try:

2562

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

2563

clients_data, old_client_settings = (pickle.load

2564

(stored_state))

2565

os.remove(stored_state_path)

2566

except IOError as e:

2567

if e.errno == errno.ENOENT:

2568

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

2569

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

2570

else:

2571

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

2572

exc_info=e)

2573

raise

2574

except EOFError as e:

2575

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

2576

"EOFError:", exc_info=e)

2577

2578

with PGPEngine() as pgp:

2579

for client_name, client in clients_data.iteritems():

2580

# Skip removed clients

2581

if client_name not in client_settings:

2582

continue

2583

2584

# Decide which value to use after restoring saved state.

2585

# We have three different values: Old config file,

2586

# new config file, and saved state.

2587

# New config value takes precedence if it differs from old

2588

# config value, otherwise use saved state.

2589

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

2590

try:

2591

# For each value in new config, check if it

2592

# differs from the old config value (Except for

2593

# the "secret" attribute)

2594

if (name != "secret" and

2595

value != old_client_settings[client_name]

2596

[name]):

2597

client[name] = value

2598

except KeyError:

2599

pass

2600

2601

# Clients who has passed its expire date can still be

2602

# enabled if its last checker was successful. Clients

2603

# whose checker succeeded before we stored its state is

2604

# assumed to have successfully run all checkers during

2605

# downtime.

2606

if client["enabled"]:

2607

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

2608

if not client["last_checked_ok"]:

2609

logger.warning(

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

2613

client["enabled"] = False

2614

elif client["last_checker_status"] != 0:

2615

logger.warning(

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

2620

client["enabled"] = False

2621

else:

2622

client["expires"] = (datetime.datetime

2623

.utcnow()

2624

+ client["timeout"])

2625

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2628

1922

try:

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2631

client_settings[client_name]

2632

["secret"]))

2633

except PGPError:

2634

# If decryption fails, we use secret from new settings

2635

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

2636

.format(client_name))

2637

client["secret"] = (

2638

client_settings[client_name]["secret"])

2639

2640

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

2641

for client_name in (set(old_client_settings)

2642

- set(client_settings)):

2643

del clients_data[client_name]

2644

for client_name in (set(client_settings)

2645

- set(old_client_settings)):

2646

clients_data[client_name] = client_settings[client_name]

2647

2648

# Create all client objects

2649

for client_name, client in clients_data.iteritems():

2650

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2653

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2654

1932

if not tcp_server.clients:

2655

1933

logger.warning("No clients defined")

2656

2657

if not foreground:

2658

if pidfile is not None:

2659

try:

2660

with pidfile:

2661

pid = os.getpid()

2662

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

2663

except IOError:

2664

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

2665

pidfilename, pid)

2666

del pidfile

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

2667

1947

del pidfilename

2668

1948

1949

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

1950

2669

1951

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

2670

1952

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

2671

1953

2672

1954

if use_dbus:

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

1955

class MandosDBusService(dbus.service.Object):

2676

1956

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

2677

1957

def __init__(self):

2678

1958

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

2679

_interface = "se.recompile.Mandos"

2680

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

1959

_interface = "se.bsnet.fukt.Mandos"

2686

1960

2687

1961

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

2688

1962

def ClientAdded(self, objpath):

2703

1977

def GetAllClients(self):

2704

1978

"D-Bus method"

2705

1979

return dbus.Array(c.dbus_object_path

2706

for c in

2707

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2708

1981

2709

1982

@dbus.service.method(_interface,

2710

1983

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

2712

1985

"D-Bus method"

2713

1986

return dbus.Dictionary(

2714

1987

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

2715

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

1988

for c in tcp_server.clients),

2716

1989

signature="oa{sv}")

2717

1990

2718

1991

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

2719

1992

def RemoveClient(self, object_path):

2720

1993

"D-Bus method"

2721

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2722

1995

if c.dbus_object_path == object_path:

2723

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2724

1997

c.remove_from_connection()

2725

1998

# Don't signal anything except ClientRemoved

2726

1999

c.disable(quiet=True)

2737

2010

"Cleanup function; run on exit"

2738

2011

service.cleanup()

2739

2012

2740

multiprocessing.active_children()

2741

wnull.close()

2742

if not (tcp_server.clients or client_settings):

2743

return

2744

2745

# Store client before exiting. Secrets are encrypted with key

2746

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

2747

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

2748

clients = {}

2749

with PGPEngine() as pgp:

2750

for client in tcp_server.clients.itervalues():

2751

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

2752

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

2753

key)

2754

client_dict = {}

2755

2756

# A list of attributes that can not be pickled

2757

# + secret.

2758

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

2759

"checker", "server_settings"))

2760

for name, typ in (inspect.getmembers

2761

(dbus.service.Object)):

2762

exclude.add(name)

2763

2764

client_dict["encrypted_secret"] = (client

2765

.encrypted_secret)

2766

for attr in client.client_structure:

2767

if attr not in exclude:

2768

client_dict[attr] = getattr(client, attr)

2769

2770

clients[client.name] = client_dict

2771

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

2772

2773

try:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2778

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

2779

tempname=stored_state.name

2780

os.rename(tempname, stored_state_path)

2781

except (IOError, OSError) as e:

2782

if not debug:

2783

try:

2784

os.remove(tempname)

2785

except NameError:

2786

pass

2787

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

2788

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

2789

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

2790

else:

2791

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

2792

exc_info=e)

2793

raise e

2794

2795

# Delete all clients, and settings from config

2796

2013

while tcp_server.clients:

2797

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2798

2015

if use_dbus:

2799

2016

client.remove_from_connection()

2017

client.disable_hook = None

2800

2018

# Don't signal anything except ClientRemoved

2801

2019

client.disable(quiet=True)

2802

2020

if use_dbus:

2803

2021

# Emit D-Bus signal

2804

mandos_dbus_service.ClientRemoved(client

2805

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2806

2023

client.name)

2807

client_settings.clear()

2808

2024

2809

2025

atexit.register(cleanup)

2810

2026

2811

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2812

2028

if use_dbus:

2813

2029

# Emit D-Bus signal

2814

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2815

# Need to initiate checking of clients

2816

if client.enabled:

2817

client.init_checker()

2031

client.enable()

2818

2032

2819

2033

tcp_server.enable()

2820

2034

tcp_server.server_activate()

2823

2037

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

2824

2038

if use_ipv6:

2825

2039

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

2826

" flowinfo %d, scope_id %d",

2827

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2828

2042

else: # IPv4

2829

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

2830

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

2831

2045

2832

2046

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

2833

2047

2836

2050

try:

2837

2051

service.activate()

2838

2052

except dbus.exceptions.DBusException as error:

2839

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

2053

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

2840

2054

cleanup()

2841

2055

sys.exit(1)

2842

2056

# End of Avahi example code

2849

2063

logger.debug("Starting main loop")

2850

2064

main_loop.run()

2851

2065

except AvahiError as error:

2852

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

2066

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

2853

2067

cleanup()

2854

2068

sys.exit(1)

2855

2069

except KeyboardInterrupt: