/mandos/trunk : revision 505.1.2

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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See <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, remove=True):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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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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if remove:

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self.remove()

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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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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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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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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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.format(error))

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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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, *args, **kwargs):

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

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

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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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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extended_timeout: extra long timeout when password 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 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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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the

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# fingerprint() function

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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 {}"

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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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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

522

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.items():

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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:

339

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

344

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

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.replace(" ", ""))

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

541

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

542

datetime.datetime.utcnow())

543

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# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

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else:

355

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

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% self.name)

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

358

self.created = datetime.datetime.utcnow()

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self.enabled = False

360

self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.expires = None

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self.checker_callback_tag = None

372

self.checker_command = config["checker"]

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self.current_checker_command = None

550

self.approved = None

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self.last_connect = None

375

self._approved = None

376

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

377

True)

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self.approvals_pending = 0

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

557

if not attr.startswith("_")]

558

self.client_structure.append("client_structure")

559

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

561

lambda obj:

562

isinstance(obj,

563

property)):

564

if not name.startswith("_"):

565

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

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config["approval_duration"])

383

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

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567

# Send notice to process children that client state has changed

568

385

def send_changedstate(self):

569

with self.changedstate:

570

self.changedstate.notify_all()

571

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

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def enable(self):

573

391

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

574

392

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

575

393

# Already enabled

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return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

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self.enabled = True

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407

self.last_enabled = datetime.datetime.utcnow()

580

self.init_checker()

581

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

582

410

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411

def disable(self, quiet=True):

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412

"""Disable this client."""

585

413

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

586

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return False

587

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

588

418

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

589

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

419

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

590

420

gobject.source_remove(self.disable_initiator_tag)

591

421

self.disable_initiator_tag = None

592

422

self.expires = None

593

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

423

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

594

424

gobject.source_remove(self.checker_initiator_tag)

595

425

self.checker_initiator_tag = None

596

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

597

429

self.enabled = False

598

if not quiet:

599

self.send_changedstate()

600

430

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

601

431

return False

602

432

603

433

def __del__(self):

434

self.disable_hook = None

604

435

self.disable()

605

436

606

def init_checker(self):

607

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

608

# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

615

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

625

437

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

626

438

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

627

439

self.checker_callback_tag = None

628

440

self.checker = None

629

441

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

632

444

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

633

445

vars(self))

634

446

self.checked_ok()

636

448

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

637

449

vars(self))

638

450

else:

639

self.last_checker_status = -1

640

451

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

641

452

vars(self))

642

453

643

def checked_ok(self):

644

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

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

651

460

if timeout is None:

652

461

timeout = self.timeout

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

660

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

661

468

662

469

def need_approval(self):

663

470

self.last_approval_request = datetime.datetime.utcnow()

668

475

If a checker already exists, leave it running and do

669

476

nothing."""

670

477

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

675

482

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

676

483

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

677

484

# should be.

679

486

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

680

487

try:

681

488

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

687

493

else:

688

494

if pid:

689

495

logger.warning("Checker was a zombie")

692

498

self.current_checker_command)

693

499

# Start a new checker if needed

694

500

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

699

501

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

705

520

self.current_checker_command = command

706

521

try:

707

522

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

710

525

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

711

526

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

712

527

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

528

self.checker = subprocess.Popen(command,

722

529

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

736

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

737

541

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

542

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

543

error)

747

544

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

748

545

return True

749

546

756

553

return

757

554

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

758

555

try:

759

self.checker.terminate()

556

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

760

557

#time.sleep(0.5)

761

558

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

762

# self.checker.kill()

559

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

763

560

except OSError as error:

764

561

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

765

562

raise

782

579

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

783

580

if byte_arrays and signature != "ay":

784

581

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

785

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

582

" signature %r" % signature)

786

583

def decorator(func):

787

584

func._dbus_is_property = True

788

585

func._dbus_interface = dbus_interface

796

593

return decorator

797

594

798

595

799

def dbus_interface_annotations(dbus_interface):

800

"""Decorator for marking functions returning interface annotations

801

802

Usage:

803

804

@dbus_interface_annotations("org.example.Interface")

805

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

806

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

807

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

808

"false"}

809

"""

810

def decorator(func):

811

func._dbus_is_interface = True

812

func._dbus_interface = dbus_interface

813

func._dbus_name = dbus_interface

814

return func

815

return decorator

816

817

818

def dbus_annotations(annotations):

819

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

820

Usage:

821

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

825

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

826

access="r")

827

def Property_dbus_property(self):

828

return dbus.Boolean(False)

829

"""

830

def decorator(func):

831

func._dbus_annotations = annotations

832

return func

833

return decorator

834

835

836

596

class DBusPropertyException(dbus.exceptions.DBusException):

837

597

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

838

598

"""

839

pass

599

def __unicode__(self):

600

return unicode(str(self))

601

840

602

841

603

class DBusPropertyAccessException(DBusPropertyException):

842

604

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

859

621

"""

860

622

861

623

@staticmethod

862

def _is_dbus_thing(thing):

863

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

864

865

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

866

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

867

"""

868

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

869

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

870

626

871

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

872

628

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

873

629

"""

874

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

875

name),

876

athing.__get__(self))

630

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

877

631

for cls in self.__class__.__mro__

878

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

881

633

882

634

def _get_dbus_property(self, interface_name, property_name):

883

635

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

884

636

property with the specified name and interface.

885

637

"""

886

638

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

890

if (value._dbus_name == property_name

891

and value._dbus_interface == interface_name):

639

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

640

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

892

641

return value.__get__(self)

893

642

894

643

# No such property

920

669

# The byte_arrays option is not supported yet on

921

670

# signatures other than "ay".

922

671

if prop._dbus_signature != "ay":

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

926

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

927

for byte in value))

672

raise ValueError

673

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

674

for byte in value))

928

675

prop(value)

929

676

930

677

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

935

682

936

683

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

937

684

"""

938

properties = {}

939

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

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

940

687

if (interface_name

941

688

and interface_name != prop._dbus_interface):

942

689

# Interface non-empty but did not match

946

693

continue

947

694

value = prop()

948

695

if not hasattr(value, "variant_level"):

949

properties[name] = value

696

all[name] = value

950

697

continue

951

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

952

value.variant_level+1)

953

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

954

955

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

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

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

959

standard.

960

"""

961

pass

698

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

699

value.variant_level+1)

700

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

962

701

963

702

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

703

out_signature="s",

965

704

path_keyword='object_path',

966

705

connection_keyword='connection')

967

706

def Introspect(self, object_path, connection):

968

"""Overloading of standard D-Bus method.

969

970

Inserts property tags and interface annotation tags.

707

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

971

708

"""

972

709

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

973

710

connection)

980

717

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

981

718

return e

982

719

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

983

# Add property tags

984

720

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

985

721

for name, prop

986

in self._get_all_dbus_things("property")

722

in self._get_all_dbus_properties()

987

723

if prop._dbus_interface

988

724

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

989

725

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1021

726

# Add the names to the return values for the

1022

727

# "org.freedesktop.DBus.Properties" methods

1023

728

if (if_tag.getAttribute("name")

1038

743

except (AttributeError, xml.dom.DOMException,

1039

744

xml.parsers.expat.ExpatError) as error:

1040

745

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

1041

exc_info=error)

746

error)

1042

747

return xmlstring

1043

748

1044

749

1045

def datetime_to_dbus(dt, variant_level=0):

750

def datetime_to_dbus (dt, variant_level=0):

1046

751

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

1047

752

if dt is None:

1048

753

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

1049

754

return dbus.String(dt.isoformat(),

1050

755

variant_level=variant_level)

1051

756

1052

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1054

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

1055

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

1056

interface names according to the "alt_interface_names" mapping.

1057

Usage:

1058

1059

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

1060

"net.example.AlternateInterface"})

1061

class SampleDBusObject(dbus.service.Object):

1062

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

1063

def SampleDBusMethod():

1064

pass

1065

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

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

1068

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

1069

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

1070

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

1071

1072

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

1073

(from DBusObjectWithProperties) and interfaces (from the

1074

dbus_interface_annotations decorator).

757

class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):

758

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

759

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

1075

760

"""

1076

def wrapper(cls):

1077

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1079

attr = {}

1080

interface_names = set()

1081

# Go though all attributes of the class

1082

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

761

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

762

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

763

# methods, signals, or properties in them

764

for base in (b for b in bases

765

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

766

# Go though all attributes of the base class

767

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

1083

768

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

1084

769

# with the wrong interface name

1085

770

if (not hasattr(attribute, "_dbus_interface")

1086

771

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

772

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

1088

773

continue

1089

774

# Create an alternate D-Bus interface name based on

1090

775

# the current name

1091

776

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_interface)

777

.replace("se.recompile.Mandos",

778

"se.bsnet.fukt.Mandos"))

1095

779

# Is this a D-Bus signal?

1096

780

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

1097

# Extract the original non-method undecorated

1098

# function by black magic

781

# Extract the original non-method function by

782

# black magic

1099

783

nonmethod_func = (dict(

1100

784

zip(attribute.func_code.co_freevars,

1101

785

attribute.__closure__))["func"]

1112

796

nonmethod_func.func_name,

1113

797

nonmethod_func.func_defaults,

1114

798

nonmethod_func.func_closure)))

1115

# Copy annotations, if any

1116

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1119

except AttributeError:

1120

pass

1121

799

# Define a creator of a function to call both the

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

800

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

801

# signals gets sent when the function is called

1125

802

def fixscope(func1, func2):

1126

803

"""This function is a scope container to pass

1127

804

func1 and func2 to the "call_both" function

1134

811

return call_both

1135

812

# Create the "call_both" function and add it to

1136

813

# the class

1137

attr[attrname] = fixscope(attribute, new_function)

814

attr[attrname] = fixscope(attribute,

815

new_function)

1138

816

# Is this a D-Bus method?

1139

817

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

1140

818

# Create a new, but exactly alike, function

1151

829

attribute.func_name,

1152

830

attribute.func_defaults,

1153

831

attribute.func_closure)))

1154

# Copy annotations, if any

1155

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1158

except AttributeError:

1159

pass

1160

832

# Is this a D-Bus property?

1161

833

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

1162

834

# Create a new, but exactly alike, function

1176

848

attribute.func_name,

1177

849

attribute.func_defaults,

1178

850

attribute.func_closure)))

1179

# Copy annotations, if any

1180

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1183

except AttributeError:

1184

pass

1185

# Is this a D-Bus interface?

1186

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

1187

# Create a new, but exactly alike, function

1188

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

1189

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

1190

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1199

if deprecate:

1200

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1202

for interface_name in interface_names:

1203

@dbus_interface_annotations(interface_name)

1204

def func(self):

1205

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

1206

"true" }

1207

# Find an unused name

1208

for aname in (iname.format(i)

1209

for i in itertools.count()):

1210

if aname not in attr:

1211

attr[aname] = func

1212

break

1213

if interface_names:

1214

# Replace the class with a new subclass of it with

1215

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1218

return cls

1219

return wrapper

1220

1221

1222

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

1223

"se.bsnet.fukt.Mandos"})

851

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

852

1224

853

class ClientDBus(Client, DBusObjectWithProperties):

1225

854

"""A Client class using D-Bus

1226

855

1232

861

runtime_expansions = (Client.runtime_expansions

1233

862

+ ("dbus_object_path",))

1234

863

1235

_interface = "se.recompile.Mandos.Client"

1236

1237

864

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

1238

865

1239

866

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

867

self._approvals_pending = 0

1240

868

self.bus = bus

1241

869

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

1242

870

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

1243

871

# the D-Bus

1244

client_object_name = str(self.name).translate(

872

client_object_name = unicode(self.name).translate(

1245

873

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

1246

874

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

1247

875

self.dbus_object_path = (dbus.ObjectPath

1248

876

("/clients/" + client_object_name))

1249

877

DBusObjectWithProperties.__init__(self, self.bus,

1250

878

self.dbus_object_path)

1251

879

1252

880

def notifychangeproperty(transform_func,

1253

881

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

882

variant_level=1):

1256

883

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

1257

884

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.

885

886

transform_fun: Function that takes a value and transforms it

887

to a D-Bus type.

1261

888

dbus_name: D-Bus name of the variable

1262

889

type_func: Function that transform the value before sending it

1263

890

to the D-Bus. Default: no transform

1264

891

variant_level: D-Bus variant level. Default: 1

1265

892

"""

1266

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

893

real_value = [None,]

1267

894

def setter(self, value):

895

old_value = real_value[0]

896

real_value[0] = value

1268

897

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

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1287

setattr(self, attrname, value)

898

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

899

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

900

variant_level)

901

self.PropertyChanged(dbus.String(dbus_name),

902

dbus_value)

1288

903

1289

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

904

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

905

1290

906

1291

907

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

908

approvals_pending = notifychangeproperty(dbus.Boolean,

1296

912

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

913

"LastEnabled")

1298

914

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

1299

type_func = lambda checker:

1300

checker is not None)

915

type_func = lambda checker: checker is not None)

1301

916

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

917

"LastCheckedOK")

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1304

"LastCheckerStatus")

1305

last_approval_request = notifychangeproperty(

1306

datetime_to_dbus, "LastApprovalRequest")

918

last_approval_request = notifychangeproperty(datetime_to_dbus,

919

"LastApprovalRequest")

1307

920

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

921

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1314

approval_duration = notifychangeproperty(

1315

dbus.UInt64, "ApprovalDuration",

1316

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

922

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

923

type_func = _timedelta_to_milliseconds)

924

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

925

type_func = _timedelta_to_milliseconds)

1317

926

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1321

extended_timeout = notifychangeproperty(

1322

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

927

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

928

type_func = _timedelta_to_milliseconds)

929

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

930

type_func = _timedelta_to_milliseconds)

931

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

932

type_func = _timedelta_to_milliseconds)

1329

933

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

1330

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

1331

invalidate_only=True)

1332

934

1333

935

del notifychangeproperty

1334

936

1361

963

*args, **kwargs)

1362

964

1363

965

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

1364

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

966

old_checker = self.checker

967

if self.checker is not None:

968

old_checker_pid = self.checker.pid

969

else:

970

old_checker_pid = None

1365

971

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

1366

972

# Only if new checker process was started

1367

973

if (self.checker is not None

1371

977

return r

1372

978

1373

979

def _reset_approved(self):

1374

self.approved = None

980

self._approved = None

1375

981

return False

1376

982

1377

983

def approve(self, value=True):

1378

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1381

984

self.send_changedstate()

985

self._approved = value

986

gobject.timeout_add(_timedelta_to_milliseconds

987

(self.approval_duration),

988

self._reset_approved)

989

1382

990

1383

991

## D-Bus methods, signals & properties

1384

1385

## Interfaces

992

_interface = "se.recompile.Mandos.Client"

1386

993

1387

994

## Signals

1388

995

1399

1006

pass

1400

1007

1401

1008

# PropertyChanged - signal

1402

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

1403

1009

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

1404

1010

def PropertyChanged(self, property, value):

1405

1011

"D-Bus signal"

1481

1087

access="readwrite")

1482

1088

def ApprovalDelay_dbus_property(self, value=None):

1483

1089

if value is None: # get

1484

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

1485

* 1000)

1090

return dbus.UInt64(self.approval_delay_milliseconds())

1486

1091

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

1487

1092

1488

1093

# ApprovalDuration - property

1490

1095

access="readwrite")

1491

1096

def ApprovalDuration_dbus_property(self, value=None):

1492

1097

if value is None: # get

1493

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

1494

* 1000)

1098

return dbus.UInt64(_timedelta_to_milliseconds(

1099

self.approval_duration))

1495

1100

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

1496

1101

1497

1102

# Name - property

1510

1115

def Host_dbus_property(self, value=None):

1511

1116

if value is None: # get

1512

1117

return dbus.String(self.host)

1513

self.host = str(value)

1118

self.host = value

1514

1119

1515

1120

# Created - property

1516

1121

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

1517

1122

def Created_dbus_property(self):

1518

return datetime_to_dbus(self.created)

1123

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

1519

1124

1520

1125

# LastEnabled - property

1521

1126

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

1542

1147

return

1543

1148

return datetime_to_dbus(self.last_checked_ok)

1544

1149

1545

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1548

def LastCheckerStatus_dbus_property(self):

1549

return dbus.Int16(self.last_checker_status)

1550

1551

1150

# Expires - property

1552

1151

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

1553

1152

def Expires_dbus_property(self):

1563

1162

access="readwrite")

1564

1163

def Timeout_dbus_property(self, value=None):

1565

1164

if value is None: # get

1566

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

1567

old_timeout = self.timeout

1165

return dbus.UInt64(self.timeout_milliseconds())

1568

1166

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

1569

# Reschedule disabling

1570

if self.enabled:

1571

now = datetime.datetime.utcnow()

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1574

# The timeout has passed

1575

self.disable()

1576

else:

1577

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

1578

is None):

1579

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1167

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

1168

return

1169

# Reschedule timeout

1170

gobject.source_remove(self.disable_initiator_tag)

1171

self.disable_initiator_tag = None

1172

self.expires = None

1173

time_to_die = (self.

1174

_timedelta_to_milliseconds((self

1175

.last_checked_ok

1176

+ self.timeout)

1177

- datetime.datetime

1178

.utcnow()))

1179

if time_to_die <= 0:

1180

# The timeout has passed

1181

self.disable()

1182

else:

1183

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

1184

+ datetime.timedelta(milliseconds = time_to_die))

1185

self.disable_initiator_tag = (gobject.timeout_add

1186

(time_to_die, self.disable))

1585

1187

1586

1188

# ExtendedTimeout - property

1587

1189

@dbus_service_property(_interface, signature="t",

1588

1190

access="readwrite")

1589

1191

def ExtendedTimeout_dbus_property(self, value=None):

1590

1192

if value is None: # get

1591

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

1592

* 1000)

1193

return dbus.UInt64(self.extended_timeout_milliseconds())

1593

1194

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

1594

1195

1595

1196

# Interval - property

1597

1198

access="readwrite")

1598

1199

def Interval_dbus_property(self, value=None):

1599

1200

if value is None: # get

1600

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

1201

return dbus.UInt64(self.interval_milliseconds())

1601

1202

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

1602

1203

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

1603

1204

return

1604

if self.enabled:

1605

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1205

# Reschedule checker run

1206

gobject.source_remove(self.checker_initiator_tag)

1207

self.checker_initiator_tag = (gobject.timeout_add

1208

(value, self.start_checker))

1209

self.start_checker() # Start one now, too

1610

1210

1611

1211

# Checker - property

1612

1212

@dbus_service_property(_interface, signature="s",

1614

1214

def Checker_dbus_property(self, value=None):

1615

1215

if value is None: # get

1616

1216

return dbus.String(self.checker_command)

1617

self.checker_command = str(value)

1217

self.checker_command = value

1618

1218

1619

1219

# CheckerRunning - property

1620

1220

@dbus_service_property(_interface, signature="b",

1636

1236

@dbus_service_property(_interface, signature="ay",

1637

1237

access="write", byte_arrays=True)

1638

1238

def Secret_dbus_property(self, value):

1639

self.secret = bytes(value)

1239

self.secret = str(value)

1640

1240

1641

1241

del _interface

1642

1242

1649

1249

raise KeyError()

1650

1250

1651

1251

def __getattribute__(self, name):

1652

if name == '_pipe':

1252

if(name == '_pipe'):

1653

1253

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

1654

1254

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

1655

1255

data = self._pipe.recv()

1662

1262

return func

1663

1263

1664

1264

def __setattr__(self, name, value):

1665

if name == '_pipe':

1265

if(name == '_pipe'):

1666

1266

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

1667

1267

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

1668

1268

1269

class ClientDBusTransitional(ClientDBus):

1270

__metaclass__ = AlternateDBusNamesMetaclass

1669

1271

1670

1272

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

1273

"""A class to handle client connections.

1676

1278

def handle(self):

1677

1279

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

1678

1280

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

1679

str(self.client_address))

1281

unicode(self.client_address))

1680

1282

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

1681

1283

self.server.child_pipe.fileno())

1682

1284

1708

1310

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

1709

1311

try:

1710

1312

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

1711

raise RuntimeError(line)

1313

raise RuntimeError

1712

1314

except (ValueError, IndexError, RuntimeError) as error:

1713

1315

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

1714

1316

return

1751

1353

client.name)

1752

1354

if self.server.use_dbus:

1753

1355

# Emit D-Bus signal

1754

client.Rejected("Disabled")

1356

client.Rejected("Disabled")

1755

1357

return

1756

1358

1757

if client.approved or not client.approval_delay:

1359

if client._approved or not client.approval_delay:

1758

1360

#We are approved or approval is disabled

1759

1361

break

1760

elif client.approved is None:

1362

elif client._approved is None:

1761

1363

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

1762

1364

client.name)

1763

1365

if self.server.use_dbus:

1764

1366

# Emit D-Bus signal

1765

1367

client.NeedApproval(

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1368

client.approval_delay_milliseconds(),

1369

client.approved_by_default)

1768

1370

else:

1769

1371

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

1770

1372

client.name)

1774

1376

return

1775

1377

1776

1378

#wait until timeout or approved

1379

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

1777

1380

time = datetime.datetime.now()

1778

1381

client.changedstate.acquire()

1779

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

1382

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

1780

1383

client.changedstate.release()

1781

1384

time2 = datetime.datetime.now()

1782

1385

if (time2 - time) >= delay:

1798

1401

try:

1799

1402

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

1800

1403

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1404

logger.warning("gnutls send failed")

1803

1405

return

1804

1406

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

1805

1407

sent, len(client.secret)

1807

1409

sent_size += sent

1808

1410

1809

1411

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

1810

# bump the timeout using extended_timeout

1811

client.bump_timeout(client.extended_timeout)

1412

# bump the timeout as if seen

1413

client.checked_ok(client.extended_timeout)

1812

1414

if self.server.use_dbus:

1813

1415

# Emit D-Bus signal

1814

1416

client.GotSecret()

1819

1421

try:

1820

1422

session.bye()

1821

1423

except gnutls.errors.GNUTLSError as error:

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1424

logger.warning("GnuTLS bye failed")

1824

1425

1825

1426

@staticmethod

1826

1427

def peer_certificate(session):

1882

1483

# Convert the buffer to a Python bytestring

1883

1484

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

1884

1485

# Convert the bytestring to hexadecimal notation

1885

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

1486

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

1886

1487

return hex_fpr

1887

1488

1888

1489

1891

1492

def sub_process_main(self, request, address):

1892

1493

try:

1893

1494

self.finish_request(request, address)

1894

except Exception:

1495

except:

1895

1496

self.handle_error(request, address)

1896

1497

self.close_request(request)

1897

1498

1898

1499

def process_request(self, request, address):

1899

1500

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

1900

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

1901

args = (request, address))

1902

proc.start()

1903

return proc

1501

multiprocessing.Process(target = self.sub_process_main,

1502

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

1904

1503

1905

1504

1906

1505

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1912

1511

"""

1913

1512

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1914

1513

1915

proc = MultiprocessingMixIn.process_request(self, request,

1916

client_address)

1514

super(MultiprocessingMixInWithPipe,

1515

self).process_request(request, client_address)

1917

1516

self.child_pipe.close()

1918

self.add_pipe(parent_pipe, proc)

1517

self.add_pipe(parent_pipe)

1919

1518

1920

def add_pipe(self, parent_pipe, proc):

1519

def add_pipe(self, parent_pipe):

1921

1520

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

1922

raise NotImplementedError()

1521

raise NotImplementedError

1923

1522

1924

1523

1925

1524

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1932

1531

use_ipv6: Boolean; to use IPv6 or not

1933

1532

"""

1934

1533

def __init__(self, server_address, RequestHandlerClass,

1935

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

1936

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

1937

creating a new one with socket.socket().

1938

"""

1534

interface=None, use_ipv6=True):

1939

1535

self.interface = interface

1940

1536

if use_ipv6:

1941

1537

self.address_family = socket.AF_INET6

1942

if socketfd is not None:

1943

# Save the file descriptor

1944

self.socketfd = socketfd

1945

# Save the original socket.socket() function

1946

self.socket_socket = socket.socket

1947

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

1948

#

1949

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

1950

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

1951

# patching socket.socket.)

1952

#

1953

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

1954

@functools.wraps(socket.socket)

1955

def socket_wrapper(*args, **kwargs):

1956

# Restore original function so subsequent calls are

1957

# not affected.

1958

socket.socket = self.socket_socket

1959

del self.socket_socket

1960

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

1961

# saved file descriptor.

1962

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

1963

# Replace socket.socket() function with wrapper

1964

socket.socket = socket_wrapper

1965

# The socketserver.TCPServer.__init__ will call

1966

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

1967

# socket_wrapper(), if socketfd was set.

1968

1538

socketserver.TCPServer.__init__(self, server_address,

1969

1539

RequestHandlerClass)

1970

1971

1540

def server_bind(self):

1972

1541

"""This overrides the normal server_bind() function

1973

1542

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

1981

1550

try:

1982

1551

self.socket.setsockopt(socket.SOL_SOCKET,

1983

1552

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1553

str(self.interface

1554

+ '\0'))

1986

1555

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1556

if error[0] == errno.EPERM:

1557

logger.error("No permission to"

1558

" bind to interface %s",

1559

self.interface)

1560

elif error[0] == errno.ENOPROTOOPT:

1991

1561

logger.error("SO_BINDTODEVICE not available;"

1992

1562

" cannot bind to interface %s",

1993

1563

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

1564

else:

1998

1565

raise

1999

1566

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

2002

1569

if self.address_family == socket.AF_INET6:

2003

1570

any_address = "::" # in6addr_any

2004

1571

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

1572

any_address = socket.INADDR_ANY

2006

1573

self.server_address = (any_address,

2007

1574

self.server_address[1])

2008

1575

elif not self.server_address[1]:

2029

1596

"""

2030

1597

def __init__(self, server_address, RequestHandlerClass,

2031

1598

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

2032

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

1599

gnutls_priority=None, use_dbus=True):

2033

1600

self.enabled = False

2034

1601

self.clients = clients

2035

1602

if self.clients is None:

2036

self.clients = {}

1603

self.clients = set()

2037

1604

self.use_dbus = use_dbus

2038

1605

self.gnutls_priority = gnutls_priority

2039

1606

IPv6_TCPServer.__init__(self, server_address,

2040

1607

RequestHandlerClass,

2041

1608

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1609

use_ipv6 = use_ipv6)

2044

1610

def server_activate(self):

2045

1611

if self.enabled:

2046

1612

return socketserver.TCPServer.server_activate(self)

2047

2048

1613

def enable(self):

2049

1614

self.enabled = True

2050

2051

def add_pipe(self, parent_pipe, proc):

1615

def add_pipe(self, parent_pipe):

2052

1616

# Call "handle_ipc" for both data and EOF events

2053

1617

gobject.io_add_watch(parent_pipe.fileno(),

2054

1618

gobject.IO_IN | gobject.IO_HUP,

2055

1619

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

1620

parent_pipe = parent_pipe))

1621

2060

1622

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

2061

proc = None, client_object=None):

2062

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

2063

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

2064

# Wait for other process to exit

2065

proc.join()

1623

client_object=None):

1624

condition_names = {

1625

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

1626

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

1627

# blocking).

1628

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

1629

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

1630

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

1631

# broken, usually for pipes and

1632

# sockets).

1633

}

1634

conditions_string = ' | '.join(name

1635

for cond, name in

1636

condition_names.iteritems()

1637

if cond & condition)

1638

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

1639

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

2066

1640

return False

2067

1641

2068

1642

# Read a request from the child

2073

1647

fpr = request[1]

2074

1648

address = request[2]

2075

1649

2076

for c in self.clients.itervalues():

1650

for c in self.clients:

2077

1651

if c.fingerprint == fpr:

2078

1652

client = c

2079

1653

break

2082

1656

"dress: %s", fpr, address)

2083

1657

if self.use_dbus:

2084

1658

# Emit D-Bus signal

2085

mandos_dbus_service.ClientNotFound(fpr,

2086

address[0])

1659

mandos_dbus_service.ClientNotFound(fpr, address[0])

2087

1660

parent_pipe.send(False)

2088

1661

return False

2089

1662

2090

1663

gobject.io_add_watch(parent_pipe.fileno(),

2091

1664

gobject.IO_IN | gobject.IO_HUP,

2092

1665

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

1666

parent_pipe = parent_pipe,

1667

client_object = client))

2098

1668

parent_pipe.send(True)

2099

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

2100

# same fileno

1669

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

2101

1670

return False

2102

1671

if command == 'funcall':

2103

1672

funcname = request[1]

2104

1673

args = request[2]

2105

1674

kwargs = request[3]

2106

1675

2107

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

2108

funcname)(*args,

2109

**kwargs)))

1676

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

2110

1677

2111

1678

if command == 'getattr':

2112

1679

attrname = request[1]

2113

1680

if callable(client_object.__getattribute__(attrname)):

2114

1681

parent_pipe.send(('function',))

2115

1682

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

1683

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

2118

1684

2119

1685

if command == 'setattr':

2120

1686

attrname = request[1]

2124

1690

return True

2125

1691

2126

1692

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

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

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

2226

1693

def string_to_delta(interval):

2227

1694

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

2228

1695

2239

1706

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

2240

1707

datetime.timedelta(0, 330)

2241

1708

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2248

1709

timevalue = datetime.timedelta(0)

2249

1710

for s in interval.split():

2250

1711

try:

2251

suffix = s[-1]

1712

suffix = unicode(s[-1])

2252

1713

value = int(s[:-1])

2253

1714

if suffix == "d":

2254

1715

delta = datetime.timedelta(value)

2261

1722

elif suffix == "w":

2262

1723

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

2263

1724

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2266

except IndexError as e:

1725

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

1726

except (ValueError, IndexError) as e:

2267

1727

raise ValueError(*(e.args))

2268

1728

timevalue += delta

2269

1729

return timevalue

2270

1730

2271

1731

1732

def if_nametoindex(interface):

1733

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

1734

1735

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

1736

global if_nametoindex

1737

try:

1738

if_nametoindex = (ctypes.cdll.LoadLibrary

1739

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

1740

.if_nametoindex)

1741

except (OSError, AttributeError):

1742

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

1743

def if_nametoindex(interface):

1744

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

1745

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

1746

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

1747

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1748

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

1749

interface))

1750

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

1751

ifreq[16:20])[0]

1752

return interface_index

1753

return if_nametoindex(interface)

1754

1755

2272

1756

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

2273

1757

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

2274

1758

2282

1766

sys.exit()

2283

1767

if not noclose:

2284

1768

# Close all standard open file descriptors

2285

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

1769

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

2286

1770

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

2287

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

2288

.format(os.devnull))

1771

raise OSError(errno.ENODEV,

1772

"%s not a character device"

1773

% os.path.devnull)

2289

1774

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

2290

1775

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

2291

1776

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

2300

1785

2301

1786

parser = argparse.ArgumentParser()

2302

1787

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

2303

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

1788

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

2304

1789

help="show version number and exit")

2305

1790

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

2306

1791

help="Bind to interface IF")

2312

1797

help="Run self-test")

2313

1798

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

2314

1799

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

2315

" to terminal", default=None)

1800

" to terminal")

2316

1801

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

2317

1802

help="Debug level for stdout output")

2318

1803

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

2325

1810

" files")

2326

1811

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

2327

1812

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

2328

" system bus interface", default=None)

1813

" system bus interface")

2329

1814

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

2330

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

2331

default=None)

2332

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

2333

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

2334

" state", default=None)

2335

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

2336

help="Specify a file descriptor to a network"

2337

" socket to use instead of creating one")

2338

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

2339

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

2340

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

2341

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

2342

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

2343

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

2344

default=None)

2345

1815

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

2346

1816

options = parser.parse_args()

2347

1817

2348

1818

if options.check:

2349

1819

import doctest

2350

fail_count, test_count = doctest.testmod()

2351

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

1820

doctest.testmod()

1821

sys.exit()

2352

1822

2353

1823

# Default values for config file for server-global settings

2354

1824

server_defaults = { "interface": "",

2356

1826

"port": "",

2357

1827

"debug": "False",

2358

1828

"priority":

2359

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

1829

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

2360

1830

"servicename": "Mandos",

2361

1831

"use_dbus": "True",

2362

1832

"use_ipv6": "True",

2363

1833

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2369

1834

}

2370

1835

2371

1836

# Parse config file for server-global settings

2376

1841

# Convert the SafeConfigParser object to a dict

2377

1842

server_settings = server_config.defaults()

2378

1843

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

2379

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

1844

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

2380

1845

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

2381

1846

option)

2382

1847

if server_settings["port"]:

2383

1848

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

2384

1849

"port")

2385

if server_settings["socket"]:

2386

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

2387

"socket")

2388

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

2389

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

2390

# happen with a supplied network socket.

2391

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

2392

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

2393

["socket"])

2394

1850

del server_config

2395

1851

2396

1852

# Override the settings from the config file with command line

2397

1853

# options, if set.

2398

1854

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

2399

1855

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

2400

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

2401

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

1856

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

2402

1857

value = getattr(options, option)

2403

1858

if value is not None:

2404

1859

server_settings[option] = value

2405

1860

del options

2406

1861

# Force all strings to be unicode

2407

1862

for option in server_settings.keys():

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2411

# Force all boolean options to be boolean

2412

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

2413

"foreground", "zeroconf"):

2414

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

2415

# Debug implies foreground

2416

if server_settings["debug"]:

2417

server_settings["foreground"] = True

1863

if type(server_settings[option]) is str:

1864

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

2418

1865

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

2419

1866

2420

1867

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

2421

1868

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

2428

1869

# For convenience

2429

1870

debug = server_settings["debug"]

2430

1871

debuglevel = server_settings["debuglevel"]

2431

1872

use_dbus = server_settings["use_dbus"]

2432

1873

use_ipv6 = server_settings["use_ipv6"]

2433

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

2434

stored_state_file)

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2437

2438

if debug:

2439

initlogger(debug, logging.DEBUG)

2440

else:

2441

if not debuglevel:

2442

initlogger(debug)

2443

else:

2444

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

2445

initlogger(debug, level)

2446

1874

2447

1875

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

2448

1876

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

1877

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

1878

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

1879

% server_settings["servicename"]))

2453

1880

2454

1881

# Parse config file with clients

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

1882

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

1883

"extended_timeout": "15m",

1884

"interval": "2m",

1885

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

1886

"host": "",

1887

"approval_delay": "0s",

1888

"approval_duration": "1s",

1889

}

1890

client_config = configparser.SafeConfigParser(client_defaults)

2457

1891

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

2458

1892

"clients.conf"))

2459

1893

2460

1894

global mandos_dbus_service

2461

1895

mandos_dbus_service = None

2462

1896

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2466

1897

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

2467

1898

server_settings["port"]),

2468

1899

ClientHandler,

2471

1902

use_ipv6=use_ipv6,

2472

1903

gnutls_priority=

2473

1904

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

2476

if not foreground:

2477

pidfilename = "/run/mandos.pid"

2478

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

2479

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

2480

pidfile = None

1905

use_dbus=use_dbus)

1906

if not debug:

1907

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

2481

1908

try:

2482

1909

pidfile = open(pidfilename, "w")

2483

except IOError as e:

2484

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

2485

exc_info=e)

1910

except IOError:

1911

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

2486

1912

2487

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

1913

try:

1914

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

1915

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

1916

except KeyError:

2488

1917

try:

2489

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

2491

break

1918

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

1919

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

2492

1920

except KeyError:

2493

continue

2494

else:

2495

uid = 65534

2496

gid = 65534

1921

try:

1922

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

1923

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

1924

except KeyError:

1925

uid = 65534

1926

gid = 65534

2497

1927

try:

2498

1928

os.setgid(gid)

2499

1929

os.setuid(uid)

2500

1930

except OSError as error:

2501

if error.errno != errno.EPERM:

2502

raise

1931

if error[0] != errno.EPERM:

1932

raise error

1933

1934

if not debug and not debuglevel:

1935

syslogger.setLevel(logging.WARNING)

1936

console.setLevel(logging.WARNING)

1937

if debuglevel:

1938

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

1939

syslogger.setLevel(level)

1940

console.setLevel(level)

2503

1941

2504

1942

if debug:

2505

1943

# Enable all possible GnuTLS debugging

2516

1954

.gnutls_global_set_log_function(debug_gnutls))

2517

1955

2518

1956

# Redirect stdin so all checkers get /dev/null

2519

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

1957

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

2520

1958

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

2521

1959

if null > 2:

2522

1960

os.close(null)

1961

else:

1962

# No console logging

1963

logger.removeHandler(console)

2523

1964

2524

1965

# Need to fork before connecting to D-Bus

2525

if not foreground:

1966

if not debug:

2526

1967

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

2527

1968

daemon()

2528

1969

2529

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

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

2533

1970

global main_loop

2534

1971

# From the Avahi example code

2535

DBusGMainLoop(set_as_default=True)

1972

DBusGMainLoop(set_as_default=True )

2536

1973

main_loop = gobject.MainLoop()

2537

1974

bus = dbus.SystemBus()

2538

1975

# End of Avahi example code

2540

1977

try:

2541

1978

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

2542

1979

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

1980

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

1981

bus, do_not_queue=True)

2546

1982

except dbus.exceptions.NameExistsException as e:

2547

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

1983

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

2548

1984

use_dbus = False

2549

1985

server_settings["use_dbus"] = False

2550

1986

tcp_server.use_dbus = False

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

1987

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1988

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

1989

servicetype = "_mandos._tcp",

1990

protocol = protocol, bus = bus)

1991

if server_settings["interface"]:

1992

service.interface = (if_nametoindex

1993

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

2561

1994

2562

1995

global multiprocessing_manager

2563

1996

multiprocessing_manager = multiprocessing.Manager()

2564

1997

2565

1998

client_class = Client

2566

1999

if use_dbus:

2567

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

2568

2569

client_settings = Client.config_parser(client_config)

2570

old_client_settings = {}

2571

clients_data = {}

2572

2573

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

2574

global wnull

2575

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

2576

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

2577

# mode

2578

if debug or not foreground:

2579

wnull.close()

2580

2581

# Get client data and settings from last running state.

2582

if server_settings["restore"]:

2583

try:

2584

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

2587

os.remove(stored_state_path)

2588

except IOError as e:

2589

if e.errno == errno.ENOENT:

2590

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

2591

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

2592

else:

2593

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

2594

exc_info=e)

2595

raise

2596

except EOFError as e:

2597

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

2598

"EOFError:", exc_info=e)

2599

2600

with PGPEngine() as pgp:

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2606

# Decide which value to use after restoring saved state.

2607

# We have three different values: Old config file,

2608

# new config file, and saved state.

2609

# New config value takes precedence if it differs from old

2610

# config value, otherwise use saved state.

2611

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

2612

try:

2613

# For each value in new config, check if it

2614

# differs from the old config value (Except for

2615

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

2619

client[name] = value

2620

except KeyError:

2621

pass

2622

2623

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

2625

# whose checker succeeded before we stored its state is

2626

# assumed to have successfully run all checkers during

2627

# downtime.

2628

if client["enabled"]:

2629

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

2630

if not client["last_checked_ok"]:

2631

logger.warning(

2632

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

2635

client["enabled"] = False

2636

elif client["last_checker_status"] != 0:

2637

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

2642

client["enabled"] = False

2643

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2647

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

2000

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

2001

def client_config_items(config, section):

2002

special_settings = {

2003

"approved_by_default":

2004

lambda: config.getboolean(section,

2005

"approved_by_default"),

2006

}

2007

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

2650

2008

try:

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

2655

except PGPError:

2656

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

2662

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

2663

for client_name in (set(old_client_settings)

2664

- set(client_settings)):

2665

del clients_data[client_name]

2666

for client_name in (set(client_settings)

2667

- set(old_client_settings)):

2668

clients_data[client_name] = client_settings[client_name]

2669

2670

# Create all client objects

2671

for client_name, client in clients_data.items():

2672

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

2009

yield (name, special_settings[name]())

2010

except KeyError:

2011

yield (name, value)

2012

2013

tcp_server.clients.update(set(

2014

client_class(name = section,

2015

config= dict(client_config_items(

2016

client_config, section)))

2017

for section in client_config.sections()))

2676

2018

if not tcp_server.clients:

2677

2019

logger.warning("No clients defined")

2678

2679

if not foreground:

2680

if pidfile is not None:

2681

try:

2682

with pidfile:

2683

pid = os.getpid()

2684

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

2685

except IOError:

2686

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

2687

pidfilename, pid)

2688

del pidfile

2020

2021

if not debug:

2022

try:

2023

with pidfile:

2024

pid = os.getpid()

2025

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

2026

del pidfile

2027

except IOError:

2028

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

2029

pidfilename, pid)

2030

except NameError:

2031

# "pidfile" was never created

2032

pass

2689

2033

del pidfilename

2034

2035

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

2690

2036

2691

2037

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

2692

2038

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

2693

2039

2694

2040

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

2041

class MandosDBusService(dbus.service.Object):

2698

2042

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

2699

2043

def __init__(self):

2700

2044

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

2701

2045

_interface = "se.recompile.Mandos"

2702

2046

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2708

2709

2047

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

2710

2048

def ClientAdded(self, objpath):

2711

2049

"D-Bus signal"

2725

2063

def GetAllClients(self):

2726

2064

"D-Bus method"

2727

2065

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2066

for c in tcp_server.clients)

2730

2067

2731

2068

@dbus.service.method(_interface,

2732

2069

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

2733

2070

def GetAllClientsWithProperties(self):

2734

2071

"D-Bus method"

2735

2072

return dbus.Dictionary(

2736

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

2737

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

2073

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

2074

for c in tcp_server.clients),

2738

2075

signature="oa{sv}")

2739

2076

2740

2077

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

2741

2078

def RemoveClient(self, object_path):

2742

2079

"D-Bus method"

2743

for c in tcp_server.clients.itervalues():

2080

for c in tcp_server.clients:

2744

2081

if c.dbus_object_path == object_path:

2745

del tcp_server.clients[c.name]

2082

tcp_server.clients.remove(c)

2746

2083

c.remove_from_connection()

2747

2084

# Don't signal anything except ClientRemoved

2748

2085

c.disable(quiet=True)

2753

2090

2754

2091

del _interface

2755

2092

2756

mandos_dbus_service = MandosDBusService()

2093

class MandosDBusServiceTransitional(MandosDBusService):

2094

__metaclass__ = AlternateDBusNamesMetaclass

2095

mandos_dbus_service = MandosDBusServiceTransitional()

2757

2096

2758

2097

def cleanup():

2759

2098

"Cleanup function; run on exit"

2760

if zeroconf:

2761

service.cleanup()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

2765

if not (tcp_server.clients or client_settings):

2766

return

2767

2768

# Store client before exiting. Secrets are encrypted with key

2769

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

2770

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

2771

clients = {}

2772

with PGPEngine() as pgp:

2773

for client in tcp_server.clients.itervalues():

2774

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

2775

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

2776

key)

2777

client_dict = {}

2778

2779

# A list of attributes that can not be pickled

2780

# + secret.

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

2785

exclude.add(name)

2786

2787

client_dict["encrypted_secret"] = (client

2788

.encrypted_secret)

2789

for attr in client.client_structure:

2790

if attr not in exclude:

2791

client_dict[attr] = getattr(client, attr)

2792

2793

clients[client.name] = client_dict

2794

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

2795

2796

try:

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

2803

os.rename(tempname, stored_state_path)

2804

except (IOError, OSError) as e:

2805

if not debug:

2806

try:

2807

os.remove(tempname)

2808

except NameError:

2809

pass

2810

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

2811

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

2812

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

2813

else:

2814

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

2815

exc_info=e)

2816

raise

2817

2818

# Delete all clients, and settings from config

2099

service.cleanup()

2100

2819

2101

while tcp_server.clients:

2820

name, client = tcp_server.clients.popitem()

2102

client = tcp_server.clients.pop()

2821

2103

if use_dbus:

2822

2104

client.remove_from_connection()

2105

client.disable_hook = None

2823

2106

# Don't signal anything except ClientRemoved

2824

2107

client.disable(quiet=True)

2825

2108

if use_dbus:

2826

2109

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2110

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2829

2111

client.name)

2830

client_settings.clear()

2831

2112

2832

2113

atexit.register(cleanup)

2833

2114

2834

for client in tcp_server.clients.itervalues():

2115

for client in tcp_server.clients:

2835

2116

if use_dbus:

2836

2117

# Emit D-Bus signal

2837

2118

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2838

# Need to initiate checking of clients

2839

if client.enabled:

2840

client.init_checker()

2119

client.enable()

2841

2120

2842

2121

tcp_server.enable()

2843

2122

tcp_server.server_activate()

2844

2123

2845

2124

# Find out what port we got

2846

if zeroconf:

2847

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

2125

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

2848

2126

if use_ipv6:

2849

2127

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

2850

" flowinfo %d, scope_id %d",

2851

*tcp_server.socket.getsockname())

2128

" flowinfo %d, scope_id %d"

2129

% tcp_server.socket.getsockname())

2852

2130

else: # IPv4

2853

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

2854

*tcp_server.socket.getsockname())

2131

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

2132

% tcp_server.socket.getsockname())

2855

2133

2856

2134

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

2857

2135

2858

2136

try:

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

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

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2137

# From the Avahi example code

2138

try:

2139

service.activate()

2140

except dbus.exceptions.DBusException as error:

2141

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

2142

cleanup()

2143

sys.exit(1)

2144

# End of Avahi example code

2868

2145

2869

2146

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

2870

2147

lambda *args, **kwargs:

2874

2151

logger.debug("Starting main loop")

2875

2152

main_loop.run()

2876

2153

except AvahiError as error:

2877

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

2154

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

2878

2155

cleanup()

2879

2156

sys.exit(1)

2880

2157

except KeyboardInterrupt:

2885

2162

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

2886

2163

cleanup()

2887

2164

2165

2888

2166

if __name__ == '__main__':

2889

2167

main()