/mandos/trunk : revision 591

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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 hashlib

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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version = "1.5.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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stored_state_path = "/var/lib/mandos/clients.pickle"

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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('%(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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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

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

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.format(self.name)))

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return ret

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def _timedelta_to_milliseconds(td):

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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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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 status

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of last checker. -1 reflect crashed checker,

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or None.

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"last_approval_request", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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self.name = name

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if config is None:

354

config = {}

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# adding all client settings

525

for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

530

self.last_enabled = datetime.datetime.utcnow()

531

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

360

.replace(" ", ""))

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542

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

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if "secret" in config:

363

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

364

elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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self.enabled = True

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self.last_approval_request = None

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self.last_enabled = datetime.datetime.utcnow()

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self.last_checked_ok = None

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self.last_checker_status = None

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

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self.extended_timeout = string_to_delta(config

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["extended_timeout"])

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

543

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self._approved = None

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

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True)

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self.approved = None

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

401

self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]

557

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

559

if not attr.startswith("_")]

402

560

self.client_structure.append("client_structure")

403

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

406

lambda obj: isinstance(obj, property)):

563

lambda obj:

564

isinstance(obj,

565

property)):

407

566

if not name.startswith("_"):

408

567

self.client_structure.append(name)

409

568

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

418

577

# Already enabled

419

578

return

420

self.send_changedstate()

421

579

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

422

580

self.enabled = True

423

581

self.last_enabled = datetime.datetime.utcnow()

424

582

self.init_checker()

583

self.send_changedstate()

425

584

426

585

def disable(self, quiet=True):

427

586

"""Disable this client."""

428

587

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

429

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return False

430

589

if not quiet:

431

self.send_changedstate()

432

if not quiet:

433

590

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

434

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

591

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

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592

gobject.source_remove(self.disable_initiator_tag)

436

593

self.disable_initiator_tag = None

437

594

self.expires = None

438

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

595

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

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596

gobject.source_remove(self.checker_initiator_tag)

440

597

self.checker_initiator_tag = None

441

598

self.stop_checker()

442

599

self.enabled = False

600

if not quiet:

601

self.send_changedstate()

443

602

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

444

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return False

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604

446

605

def __del__(self):

447

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self.disable()

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608

def init_checker(self):

450

609

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

451

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# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

452

613

self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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620

(self.timeout_milliseconds(),

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self.disable))

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# Also start a new checker *right now*.

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self.start_checker()

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

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

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627

self.checker_callback_tag = None

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628

self.checker = None

467

629

if os.WIFEXITED(condition):

468

self.last_checker_status = os.WEXITSTATUS(condition)

630

self.last_checker_status = os.WEXITSTATUS(condition)

469

631

if self.last_checker_status == 0:

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632

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

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vars(self))

478

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

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641

vars(self))

480

642

481

def checked_ok(self, timeout=None):

482

"""Bump up the timeout for this client.

483

484

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

485

alive and well.

486

"""

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."""

487

651

if timeout is None:

488

652

timeout = self.timeout

489

self.last_checked_ok = datetime.datetime.utcnow()

490

653

if self.disable_initiator_tag is not None:

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654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

492

656

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

493

657

self.disable_initiator_tag = (gobject.timeout_add

494

(_timedelta_to_milliseconds

658

(timedelta_to_milliseconds

495

659

(timeout), self.disable))

496

660

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

497

661

504

668

If a checker already exists, leave it running and do

505

669

nothing."""

506

670

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

507

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

508

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

509

# client would inevitably timeout, since no checker would get

510

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

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

511

675

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

512

676

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

513

677

# should be.

527

691

self.current_checker_command)

528

692

# Start a new checker if needed

529

693

if self.checker is None:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

530

699

try:

531

# In case checker_command has exactly one % operator

532

command = self.checker_command % self.host

533

except TypeError:

534

# Escape attributes for the shell

535

escaped_attrs = dict(

536

(attr,

537

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

538

errors=

539

'replace')))

540

for attr in

541

self.runtime_expansions)

542

543

try:

544

command = self.checker_command % escaped_attrs

545

except TypeError as error:

546

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

547

' %s', self.checker_command, error)

548

return True # Try again later

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

549

705

self.current_checker_command = command

550

706

try:

551

707

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

557

713

self.checker = subprocess.Popen(command,

558

714

close_fds=True,

559

715

shell=True, cwd="/")

560

self.checker_callback_tag = (gobject.child_watch_add

561

(self.checker.pid,

562

self.checker_callback,

563

data=command))

564

# The checker may have completed before the gobject

565

# watch was added. Check for this.

566

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

567

if pid:

568

gobject.source_remove(self.checker_callback_tag)

569

self.checker_callback(pid, status, command)

570

716

except OSError as error:

571

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

572

error)

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

573

729

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

574

730

return True

575

731

582

738

return

583

739

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

584

740

try:

585

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

741

self.checker.terminate()

586

742

#time.sleep(0.5)

587

743

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

588

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

744

# self.checker.kill()

589

745

except OSError as error:

590

746

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

591

747

raise

592

748

self.checker = None

593

749

594

# Encrypts a client secret and stores it in a varible encrypted_secret

595

def encrypt_secret(self, key):

596

# Encryption-key need to be of a specific size, so we hash inputed key

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

# Create validation hash so we know at decryption if it was sucessful

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

iv = os.urandom(Crypto.Cipher.AES.block_size)

608

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

ciphertext = ciphereng.encrypt(validationhash+self.secret)

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

# Decryption-key need to be of a specific size, so we hash inputed key

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

# if validation fails, we use key as new secret. Otherwhise, we use

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

640

750

641

751

def dbus_service_property(dbus_interface, signature="v",

642

752

access="readwrite", byte_arrays=False):

654

764

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

655

765

if byte_arrays and signature != "ay":

656

766

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

657

" signature %r" % signature)

767

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

658

768

def decorator(func):

659

769

func._dbus_is_property = True

660

770

func._dbus_interface = dbus_interface

668

778

return decorator

669

779

670

780

781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

671

818

class DBusPropertyException(dbus.exceptions.DBusException):

672

819

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

673

820

"""

696

843

"""

697

844

698

845

@staticmethod

699

def _is_dbus_property(obj):

700

return getattr(obj, "_dbus_is_property", False)

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

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

853

False)

701

854

702

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

703

856

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

704

857

"""

705

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

858

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

859

name),

860

athing.__get__(self))

706

861

for cls in self.__class__.__mro__

707

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

709

865

710

866

def _get_dbus_property(self, interface_name, property_name):

711

867

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

713

869

"""

714

870

for cls in self.__class__.__mro__:

715

871

for name, value in (inspect.getmembers

716

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

717

874

if (value._dbus_name == property_name

718

875

and value._dbus_interface == interface_name):

719

876

return value.__get__(self)

748

905

# signatures other than "ay".

749

906

if prop._dbus_signature != "ay":

750

907

raise ValueError

751

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

752

for byte in value))

908

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

909

for byte in value))

753

910

prop(value)

754

911

755

912

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

760

917

761

918

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

762

919

"""

763

all = {}

764

for name, prop in self._get_all_dbus_properties():

920

properties = {}

921

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

765

922

if (interface_name

766

923

and interface_name != prop._dbus_interface):

767

924

# Interface non-empty but did not match

771

928

continue

772

929

value = prop()

773

930

if not hasattr(value, "variant_level"):

774

all[name] = value

931

properties[name] = value

775

932

continue

776

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

777

value.variant_level+1)

778

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

933

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

934

value.variant_level+1)

935

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

779

936

780

937

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

781

938

out_signature="s",

782

939

path_keyword='object_path',

783

940

connection_keyword='connection')

784

941

def Introspect(self, object_path, connection):

785

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

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

786

945

"""

787

946

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

788

947

connection)

795

954

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

796

955

return e

797

956

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

957

# Add property tags

798

958

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

799

959

for name, prop

800

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

801

961

if prop._dbus_interface

802

962

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

803

963

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

804

995

# Add the names to the return values for the

805

996

# "org.freedesktop.DBus.Properties" methods

806

997

if (if_tag.getAttribute("name")

821

1012

except (AttributeError, xml.dom.DOMException,

822

1013

xml.parsers.expat.ExpatError) as error:

823

1014

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

824

error)

1015

exc_info=error)

825

1016

return xmlstring

826

1017

827

1018

828

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

829

1020

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

830

1021

if dt is None:

831

1022

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

832

1023

return dbus.String(dt.isoformat(),

833

1024

variant_level=variant_level)

834

1025

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

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

838

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

1026

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

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

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

839

1049

"""

840

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

841

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

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

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

845

# Go though all attributes of the base class

846

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

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

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

847

1057

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

848

1058

# with the wrong interface name

849

1059

if (not hasattr(attribute, "_dbus_interface")

850

1060

or not attribute._dbus_interface

851

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

1061

.startswith(orig_interface_name)):

852

1062

continue

853

1063

# Create an alternate D-Bus interface name based on

854

1064

# the current name

855

1065

alt_interface = (attribute._dbus_interface

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

858

1069

# Is this a D-Bus signal?

859

1070

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

860

1071

# Extract the original non-method function by

875

1086

nonmethod_func.func_name,

876

1087

nonmethod_func.func_defaults,

877

1088

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

878

1095

# Define a creator of a function to call both the

879

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

880

# signals gets sent when the function is called

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

881

1099

def fixscope(func1, func2):

882

1100

"""This function is a scope container to pass

883

1101

func1 and func2 to the "call_both" function

890

1108

return call_both

891

1109

# Create the "call_both" function and add it to

892

1110

# the class

893

attr[attrname] = fixscope(attribute,

894

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

895

1112

# Is this a D-Bus method?

896

1113

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

897

1114

# Create a new, but exactly alike, function

908

1125

attribute.func_name,

909

1126

attribute.func_defaults,

910

1127

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

911

1134

# Is this a D-Bus property?

912

1135

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

913

1136

# Create a new, but exactly alike, function

927

1150

attribute.func_name,

928

1151

attribute.func_defaults,

929

1152

attribute.func_closure)))

930

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

931

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

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

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

932

1198

class ClientDBus(Client, DBusObjectWithProperties):

933

1199

"""A Client class using D-Bus

934

1200

945

1211

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

946

1212

self.bus = bus

947

1213

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

948

949

self._approvals_pending = 0

950

1214

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

951

1215

# the D-Bus

952

1216

client_object_name = unicode(self.name).translate(

956

1220

("/clients/" + client_object_name))

957

1221

DBusObjectWithProperties.__init__(self, self.bus,

958

1222

self.dbus_object_path)

959

1223

960

1224

def notifychangeproperty(transform_func,

961

1225

dbus_name, type_func=lambda x: x,

962

1226

variant_level=1):

963

1227

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

964

1228

its changes to DBus.

965

1229

966

1230

transform_fun: Function that takes a value and a variant_level

967

1231

and transforms it to a D-Bus type.

968

1232

dbus_name: D-Bus name of the variable

985

1249

986

1250

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

987

1251

988

989

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

990

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

991

1254

"ApprovalPending",

998

1261

checker is not None)

999

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1000

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1001

1266

last_approval_request = notifychangeproperty(

1002

1267

datetime_to_dbus, "LastApprovalRequest")

1003

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1004

1269

"ApprovedByDefault")

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1006

1271

"ApprovalDelay",

1007

1272

type_func =

1008

_timedelta_to_milliseconds)

1273

timedelta_to_milliseconds)

1009

1274

approval_duration = notifychangeproperty(

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1012

1277

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

1013

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

1278

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

1014

1279

type_func =

1015

_timedelta_to_milliseconds)

1280

timedelta_to_milliseconds)

1016

1281

extended_timeout = notifychangeproperty(

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1020

1285

"Interval",

1021

1286

type_func =

1022

_timedelta_to_milliseconds)

1287

timedelta_to_milliseconds)

1023

1288

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

1024

1289

1025

1290

del notifychangeproperty

1067

1332

return r

1068

1333

1069

1334

def _reset_approved(self):

1070

self._approved = None

1335

self.approved = None

1071

1336

return False

1072

1337

1073

1338

def approve(self, value=True):

1074

self.send_changedstate()

1075

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1077

1341

(self.approval_duration),

1078

1342

self._reset_approved)

1079

1343

self.send_changedstate()

1080

1344

1081

1345

## D-Bus methods, signals & properties

1082

1346

_interface = "se.recompile.Mandos.Client"

1083

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1084

1355

## Signals

1085

1356

1086

1357

# CheckerCompleted - signal

1185

1456

access="readwrite")

1186

1457

def ApprovalDuration_dbus_property(self, value=None):

1187

1458

if value is None: # get

1188

return dbus.UInt64(_timedelta_to_milliseconds(

1459

return dbus.UInt64(timedelta_to_milliseconds(

1189

1460

self.approval_duration))

1190

1461

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

1191

1462

1205

1476

def Host_dbus_property(self, value=None):

1206

1477

if value is None: # get

1207

1478

return dbus.String(self.host)

1208

self.host = value

1479

self.host = unicode(value)

1209

1480

1210

1481

# Created - property

1211

1482

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

1212

1483

def Created_dbus_property(self):

1213

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

1484

return datetime_to_dbus(self.created)

1214

1485

1215

1486

# LastEnabled - property

1216

1487

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

1237

1508

return

1238

1509

return datetime_to_dbus(self.last_checked_ok)

1239

1510

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1240

1517

# Expires - property

1241

1518

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

1242

1519

def Expires_dbus_property(self):

1253

1530

def Timeout_dbus_property(self, value=None):

1254

1531

if value is None: # get

1255

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1256

1534

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

1257

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

1258

return

1259

# Reschedule timeout

1260

gobject.source_remove(self.disable_initiator_tag)

1261

self.disable_initiator_tag = None

1262

self.expires = None

1263

time_to_die = _timedelta_to_milliseconds((self

1264

.last_checked_ok

1265

+ self.timeout)

1266

- datetime.datetime

1267

.utcnow())

1268

if time_to_die <= 0:

1269

# The timeout has passed

1270

self.disable()

1271

else:

1272

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

1273

+ datetime.timedelta(milliseconds =

1274

time_to_die))

1275

self.disable_initiator_tag = (gobject.timeout_add

1276

(time_to_die, self.disable))

1535

# Reschedule disabling

1536

if self.enabled:

1537

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1540

# The timeout has passed

1541

self.disable()

1542

else:

1543

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

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1277

1551

1278

1552

# ExtendedTimeout - property

1279

1553

@dbus_service_property(_interface, signature="t",

1292

1566

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

1293

1567

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

1294

1568

return

1295

# Reschedule checker run

1296

gobject.source_remove(self.checker_initiator_tag)

1297

self.checker_initiator_tag = (gobject.timeout_add

1298

(value, self.start_checker))

1299

self.start_checker() # Start one now, too

1569

if self.enabled:

1570

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1300

1575

1301

1576

# Checker - property

1302

1577

@dbus_service_property(_interface, signature="s",

1304

1579

def Checker_dbus_property(self, value=None):

1305

1580

if value is None: # get

1306

1581

return dbus.String(self.checker_command)

1307

self.checker_command = value

1582

self.checker_command = unicode(value)

1308

1583

1309

1584

# CheckerRunning - property

1310

1585

@dbus_service_property(_interface, signature="b",

1339

1614

raise KeyError()

1340

1615

1341

1616

def __getattribute__(self, name):

1342

if(name == '_pipe'):

1617

if name == '_pipe':

1343

1618

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

1344

1619

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

1345

1620

data = self._pipe.recv()

1352

1627

return func

1353

1628

1354

1629

def __setattr__(self, name, value):

1355

if(name == '_pipe'):

1630

if name == '_pipe':

1356

1631

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

1357

1632

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

1358

1633

1359

class ClientDBusTransitional(ClientDBus):

1360

__metaclass__ = AlternateDBusNamesMetaclass

1361

1634

1362

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1363

1636

"""A class to handle client connections.

1446

1719

client.Rejected("Disabled")

1447

1720

return

1448

1721

1449

if client._approved or not client.approval_delay:

1722

if client.approved or not client.approval_delay:

1450

1723

#We are approved or approval is disabled

1451

1724

break

1452

elif client._approved is None:

1725

elif client.approved is None:

1453

1726

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

1454

1727

client.name)

1455

1728

if self.server.use_dbus:

1468

1741

#wait until timeout or approved

1469

1742

time = datetime.datetime.now()

1470

1743

client.changedstate.acquire()

1471

(client.changedstate.wait

1472

(float(client._timedelta_to_milliseconds(delay)

1473

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1474

1747

client.changedstate.release()

1475

1748

time2 = datetime.datetime.now()

1476

1749

if (time2 - time) >= delay:

1492

1765

try:

1493

1766

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

1494

1767

except gnutls.errors.GNUTLSError as error:

1495

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1496

1770

return

1497

1771

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

1498

1772

sent, len(client.secret)

1501

1775

1502

1776

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

1503

1777

# bump the timeout using extended_timeout

1504

client.checked_ok(client.extended_timeout)

1778

client.bump_timeout(client.extended_timeout)

1505

1779

if self.server.use_dbus:

1506

1780

# Emit D-Bus signal

1507

1781

client.GotSecret()

1512

1786

try:

1513

1787

session.bye()

1514

1788

except gnutls.errors.GNUTLSError as error:

1515

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1516

1791

1517

1792

@staticmethod

1518

1793

def peer_certificate(session):

1574

1849

# Convert the buffer to a Python bytestring

1575

1850

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

1576

1851

# Convert the bytestring to hexadecimal notation

1577

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

1852

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

1578

1853

return hex_fpr

1579

1854

1580

1855

1583

1858

def sub_process_main(self, request, address):

1584

1859

try:

1585

1860

self.finish_request(request, address)

1586

except:

1861

except Exception:

1587

1862

self.handle_error(request, address)

1588

1863

self.close_request(request)

1589

1864

1590

1865

def process_request(self, request, address):

1591

1866

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

1592

1867

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

1593

args = (request,

1594

address))

1868

args = (request, address))

1595

1869

proc.start()

1596

1870

return proc

1597

1871

1625

1899

use_ipv6: Boolean; to use IPv6 or not

1626

1900

"""

1627

1901

def __init__(self, server_address, RequestHandlerClass,

1628

interface=None, use_ipv6=True):

1902

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

1903

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

1904

creating a new one with socket.socket().

1905

"""

1629

1906

self.interface = interface

1630

1907

if use_ipv6:

1631

1908

self.address_family = socket.AF_INET6

1909

if socketfd is not None:

1910

# Save the file descriptor

1911

self.socketfd = socketfd

1912

# Save the original socket.socket() function

1913

self.socket_socket = socket.socket

1914

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

1915

#

1916

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

1917

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

1918

# patching socket.socket.)

1919

#

1920

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

1921

@functools.wraps(socket.socket)

1922

def socket_wrapper(*args, **kwargs):

1923

# Restore original function so subsequent calls are

1924

# not affected.

1925

socket.socket = self.socket_socket

1926

del self.socket_socket

1927

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

1928

# saved file descriptor.

1929

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

1930

# Replace socket.socket() function with wrapper

1931

socket.socket = socket_wrapper

1932

# The socketserver.TCPServer.__init__ will call

1933

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

1934

# socket_wrapper(), if socketfd was set.

1632

1935

socketserver.TCPServer.__init__(self, server_address,

1633

1936

RequestHandlerClass)

1937

1634

1938

def server_bind(self):

1635

1939

"""This overrides the normal server_bind() function

1636

1940

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

1647

1951

str(self.interface

1648

1952

+ '\0'))

1649

1953

except socket.error as error:

1650

if error[0] == errno.EPERM:

1954

if error.errno == errno.EPERM:

1651

1955

logger.error("No permission to"

1652

1956

" bind to interface %s",

1653

1957

self.interface)

1654

elif error[0] == errno.ENOPROTOOPT:

1958

elif error.errno == errno.ENOPROTOOPT:

1655

1959

logger.error("SO_BINDTODEVICE not available;"

1656

1960

" cannot bind to interface %s",

1657

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1658

1966

else:

1659

1967

raise

1660

1968

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

1690

1998

"""

1691

1999

def __init__(self, server_address, RequestHandlerClass,

1692

2000

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

1693

gnutls_priority=None, use_dbus=True):

2001

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

1694

2002

self.enabled = False

1695

2003

self.clients = clients

1696

2004

if self.clients is None:

1700

2008

IPv6_TCPServer.__init__(self, server_address,

1701

2009

RequestHandlerClass,

1702

2010

interface = interface,

1703

use_ipv6 = use_ipv6)

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1704

2013

def server_activate(self):

1705

2014

if self.enabled:

1706

2015

return socketserver.TCPServer.server_activate(self)

1719

2028

1720

2029

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

1721

2030

proc = None, client_object=None):

1722

condition_names = {

1723

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

1724

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

1725

# blocking).

1726

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

1727

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

1728

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

1729

# broken, usually for pipes and

1730

# sockets).

1731

}

1732

conditions_string = ' | '.join(name

1733

for cond, name in

1734

condition_names.iteritems()

1735

if cond & condition)

1736

2031

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

1737

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

2032

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

1738

2033

# Wait for other process to exit

1739

2034

proc.join()

1740

2035

return False

1830

2125

elif suffix == "w":

1831

2126

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

1832

2127

else:

1833

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

2128

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

2129

.format(suffix))

1834

2130

except (ValueError, IndexError) as e:

1835

2131

raise ValueError(*(e.args))

1836

2132

timevalue += delta

1837

2133

return timevalue

1838

2134

1839

2135

1840

def if_nametoindex(interface):

1841

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

1842

1843

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

1844

global if_nametoindex

1845

try:

1846

if_nametoindex = (ctypes.cdll.LoadLibrary

1847

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

1848

.if_nametoindex)

1849

except (OSError, AttributeError):

1850

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

1851

def if_nametoindex(interface):

1852

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

1853

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

1854

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

1855

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1856

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

1857

interface))

1858

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

1859

ifreq[16:20])[0]

1860

return interface_index

1861

return if_nametoindex(interface)

1862

1863

1864

2136

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

1865

2137

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

1866

2138

1874

2146

sys.exit()

1875

2147

if not noclose:

1876

2148

# Close all standard open file descriptors

1877

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

2149

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

1878

2150

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

1879

2151

raise OSError(errno.ENODEV,

1880

"%s not a character device"

1881

% os.path.devnull)

2152

"{0} not a character device"

2153

.format(os.devnull))

1882

2154

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

1883

2155

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

1884

2156

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

1893

2165

1894

2166

parser = argparse.ArgumentParser()

1895

2167

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

1896

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

2168

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

1897

2169

help="show version number and exit")

1898

2170

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

1899

2171

help="Bind to interface IF")

1922

2194

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

1923

2195

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

1924

2196

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

1925

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

1926

default=True)

1927

2197

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

2198

" state")

2199

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

2200

help="Specify a file descriptor to a network"

2201

" socket to use instead of creating one")

2202

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

2203

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

2204

1928

2205

options = parser.parse_args()

1929

2206

1930

2207

if options.check:

1943

2220

"use_dbus": "True",

1944

2221

"use_ipv6": "True",

1945

2222

"debuglevel": "",

2223

"restore": "True",

2224

"socket": "",

2225

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

1946

2226

}

1947

2227

1948

2228

# Parse config file for server-global settings

1959

2239

if server_settings["port"]:

1960

2240

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

1961

2241

"port")

2242

if server_settings["socket"]:

2243

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

2244

"socket")

2245

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

2246

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

2247

# happen with a supplied network socket.

2248

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

2249

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

2250

["socket"])

1962

2251

del server_config

1963

2252

1964

2253

# Override the settings from the config file with command line

1965

2254

# options, if set.

1966

2255

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

1967

2256

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

1968

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

2257

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

2258

"statedir", "socket"):

1969

2259

value = getattr(options, option)

1970

2260

if value is not None:

1971

2261

server_settings[option] = value

1983

2273

debuglevel = server_settings["debuglevel"]

1984

2274

use_dbus = server_settings["use_dbus"]

1985

2275

use_ipv6 = server_settings["use_ipv6"]

2276

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

2277

stored_state_file)

2278

2279

if debug:

2280

initlogger(debug, logging.DEBUG)

2281

else:

2282

if not debuglevel:

2283

initlogger(debug)

2284

else:

2285

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

2286

initlogger(debug, level)

1986

2287

1987

2288

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

1988

2289

syslogger.setFormatter(logging.Formatter

1989

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

1990

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

1991

% server_settings["servicename"]))

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

1992

2294

1993

2295

# Parse config file with clients

1994

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

1995

"extended_timeout": "15m",

1996

"interval": "2m",

1997

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

1998

"host": "",

1999

"approval_delay": "0s",

2000

"approval_duration": "1s",

2001

}

2002

client_config = configparser.SafeConfigParser(client_defaults)

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

2003

2298

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

2004

2299

"clients.conf"))

2005

2300

2014

2309

use_ipv6=use_ipv6,

2015

2310

gnutls_priority=

2016

2311

server_settings["priority"],

2017

use_dbus=use_dbus)

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2018

2315

if not debug:

2019

2316

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

2020

2317

try:

2021

2318

pidfile = open(pidfilename, "w")

2022

except IOError:

2023

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

2319

except IOError as e:

2320

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

2321

exc_info=e)

2024

2322

2025

try:

2026

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

2027

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

2028

except KeyError:

2323

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

2029

2324

try:

2030

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

2031

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

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

2032

2328

except KeyError:

2033

try:

2034

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

2035

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

2036

except KeyError:

2037

uid = 65534

2038

gid = 65534

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

2039

2333

try:

2040

2334

os.setgid(gid)

2041

2335

os.setuid(uid)

2042

2336

except OSError as error:

2043

if error[0] != errno.EPERM:

2337

if error.errno != errno.EPERM:

2044

2338

raise error

2045

2339

2046

if not debug and not debuglevel:

2047

logger.setLevel(logging.WARNING)

2048

if debuglevel:

2049

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

2050

logger.setLevel(level)

2051

2052

2340

if debug:

2053

logger.setLevel(logging.DEBUG)

2054

2341

# Enable all possible GnuTLS debugging

2055

2342

2056

2343

# "Use a log level over 10 to enable all debugging options."

2065

2352

.gnutls_global_set_log_function(debug_gnutls))

2066

2353

2067

2354

# Redirect stdin so all checkers get /dev/null

2068

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

2355

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

2069

2356

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

2070

2357

if null > 2:

2071

2358

os.close(null)

2072

else:

2073

# No console logging

2074

logger.removeHandler(console)

2075

2359

2076

2360

# Need to fork before connecting to D-Bus

2077

2361

if not debug:

2078

2362

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

2079

2363

daemon()

2080

2364

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

2368

2081

2369

global main_loop

2082

2370

# From the Avahi example code

2083

DBusGMainLoop(set_as_default=True )

2371

DBusGMainLoop(set_as_default=True)

2084

2372

main_loop = gobject.MainLoop()

2085

2373

bus = dbus.SystemBus()

2086

2374

# End of Avahi example code

2092

2380

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

2093

2381

do_not_queue=True))

2094

2382

except dbus.exceptions.NameExistsException as e:

2095

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

2383

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

2096

2384

use_dbus = False

2097

2385

server_settings["use_dbus"] = False

2098

2386

tcp_server.use_dbus = False

2110

2398

2111

2399

client_class = Client

2112

2400

if use_dbus:

2113

client_class = functools.partial(ClientDBusTransitional,

2114

bus = bus)

2115

2116

special_settings = {

2117

# Some settings need to be accessd by special methods;

2118

# booleans need .getboolean(), etc. Here is a list of them:

2119

"approved_by_default":

2120

lambda section:

2121

client_config.getboolean(section, "approved_by_default"),

2122

}

2123

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

2124

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

2125

# with exceptions for any special settings as defined above

2126

client_settings = dict((clientname,

2127

dict((setting,

2128

(value if setting not in special_settings

2129

else special_settings[setting](clientname)))

2130

for setting, value in client_config.items(clientname)))

2131

for clientname in client_config.sections())

2132

2401

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

2402

2403

client_settings = Client.config_parser(client_config)

2133

2404

old_client_settings = {}

2134

clients_data = []

2135

2136

# Get client data and settings from last running state.

2405

clients_data = {}

2406

2407

# Get client data and settings from last running state.

2137

2408

if server_settings["restore"]:

2138

2409

try:

2139

2410

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

2140

clients_data, old_client_settings = pickle.load(stored_state)

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

2141

2413

os.remove(stored_state_path)

2142

2414

except IOError as e:

2143

logger.warning("Could not load persistant state: {0}".format(e))

2144

if e.errno != errno.ENOENT:

2415

if e.errno == errno.ENOENT:

2416

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

2417

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

2418

else:

2419

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

2420

exc_info=e)

2145

2421

raise

2146

2147

for client in clients_data:

2148

client_name = client["name"]

2149

2150

# Decide which value to use after restoring saved state.

2151

# We have three different values: Old config file,

2152

# new config file, and saved state.

2153

# New config value takes precedence if it differs from old

2154

# config value, otherwise use saved state.

2155

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

2422

except EOFError as e:

2423

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

2424

"EOFError:", exc_info=e)

2425

2426

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2428

# Decide which value to use after restoring saved state.

2429

# We have three different values: Old config file,

2430

# new config file, and saved state.

2431

# New config value takes precedence if it differs from old

2432

# config value, otherwise use saved state.

2433

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

2434

try:

2435

# For each value in new config, check if it

2436

# differs from the old config value (Except for

2437

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

2441

client[name] = value

2442

except KeyError:

2443

pass

2444

2445

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

2447

# whose checker succeeded before we stored its state is

2448

# assumed to have successfully run all checkers during

2449

# downtime.

2450

if client["enabled"]:

2451

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

2452

if not client["last_checked_ok"]:

2453

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2457

client["enabled"] = False

2458

elif client["last_checker_status"] != 0:

2459

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2464

client["enabled"] = False

2465

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

2469

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

2156

2472

try:

2157

# For each value in new config, check if it differs

2158

# from the old config value (Except for the "secret"

2159

# attribute)

2160

if name != "secret" and value != old_client_settings[client_name][name]:

2161

setattr(client, name, value)

2162

except KeyError:

2163

pass

2164

2165

# Clients who has passed its expire date, can still be enabled if its

2166

# last checker was sucessful. Clients who checkers failed before we

2167

# stored it state is asumed to had failed checker during downtime.

2168

if client["enabled"] and client["last_checked_ok"]:

2169

if ((datetime.datetime.utcnow() - client["last_checked_ok"])

2170

> client["interval"]):

2171

if client["last_checker_status"] != 0:

2172

client["enabled"] = False

2173

else:

2174

client["expires"] = datetime.datetime.utcnow() + client["timeout"]

2175

2176

client["changedstate"] = (multiprocessing_manager

2177

.Condition(multiprocessing_manager

2178

.Lock()))

2179

if use_dbus:

2180

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2181

tcp_server.clients[client_name] = new_client

2182

new_client.bus = bus

2183

for name, value in client.iteritems():

2184

setattr(new_client, name, value)

2185

client_object_name = unicode(client_name).translate(

2186

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

2187

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

2188

new_client.dbus_object_path = (dbus.ObjectPath

2189

("/clients/" + client_object_name))

2190

DBusObjectWithProperties.__init__(new_client,

2191

new_client.bus,

2192

new_client.dbus_object_path)

2193

else:

2194

tcp_server.clients[client_name] = Client.__new__(Client)

2195

for name, value in client.iteritems():

2196

setattr(tcp_server.clients[client_name], name, value)

2197

2198

tcp_server.clients[client_name].decrypt_secret(

2199

client_settings[client_name]["secret"])

2200

2201

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

2202

for clientname in set(old_client_settings) - set(client_settings):

2203

del tcp_server.clients[clientname]

2204

for clientname in set(client_settings) - set(old_client_settings):

2205

tcp_server.clients[clientname] = (client_class(name = clientname,

2206

config =

2207

client_settings

2208

[clientname]))

2209

2210

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2477

except PGPError:

2478

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2483

2484

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

2485

for client_name in (set(old_client_settings)

2486

- set(client_settings)):

2487

del clients_data[client_name]

2488

for client_name in (set(client_settings)

2489

- set(old_client_settings)):

2490

clients_data[client_name] = client_settings[client_name]

2491

2492

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2494

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2496

2211

2497

if not tcp_server.clients:

2212

2498

logger.warning("No clients defined")

2213

2499

2214

2500

if not debug:

2215

2501

try:

2216

2502

with pidfile:

2224

2510

# "pidfile" was never created

2225

2511

pass

2226

2512

del pidfilename

2227

2228

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

2229

2513

2230

2514

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

2231

2515

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

2232

2516

2233

2517

if use_dbus:

2234

class MandosDBusService(dbus.service.Object):

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

2235

2521

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

2236

2522

def __init__(self):

2237

2523

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

2238

2524

_interface = "se.recompile.Mandos"

2239

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2240

2532

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

2241

2533

def ClientAdded(self, objpath):

2242

2534

"D-Bus signal"

2284

2576

2285

2577

del _interface

2286

2578

2287

class MandosDBusServiceTransitional(MandosDBusService):

2288

__metaclass__ = AlternateDBusNamesMetaclass

2289

mandos_dbus_service = MandosDBusServiceTransitional()

2579

mandos_dbus_service = MandosDBusService()

2290

2580

2291

2581

def cleanup():

2292

2582

"Cleanup function; run on exit"

2295

2585

multiprocessing.active_children()

2296

2586

if not (tcp_server.clients or client_settings):

2297

2587

return

2298

2299

# Store client before exiting. Secrets are encrypted with key based

2300

# on what config file has. If config file is removed/edited, old

2301

# secret will thus be unrecovable.

2302

clients = []

2303

for client in tcp_server.clients.itervalues():

2304

client.encrypt_secret(client_settings[client.name]["secret"])

2305

2306

client_dict = {}

2307

2308

# A list of attributes that will not be stored when shuting down.

2309

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

2310

for name, typ in inspect.getmembers(dbus.service.Object):

2311

exclude.add(name)

2312

2313

client_dict["encrypted_secret"] = client.encrypted_secret

2314

for attr in client.client_structure:

2315

if attr not in exclude:

2316

client_dict[attr] = getattr(client, attr)

2317

2318

clients.append(client_dict)

2319

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

2320

2588

2589

# Store client before exiting. Secrets are encrypted with key

2590

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

2591

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

2592

clients = {}

2593

with PGPEngine() as pgp:

2594

for client in tcp_server.clients.itervalues():

2595

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

2596

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

2597

key)

2598

client_dict = {}

2599

2600

# A list of attributes that can not be pickled

2601

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

2606

exclude.add(name)

2607

2608

client_dict["encrypted_secret"] = (client

2609

.encrypted_secret)

2610

for attr in client.client_structure:

2611

if attr not in exclude:

2612

client_dict[attr] = getattr(client, attr)

2613

2614

clients[client.name] = client_dict

2615

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

2616

2321

2617

try:

2322

with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2323

2622

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

2324

except IOError as e:

2325

logger.warning("Could not save persistant state: {0}".format(e))

2326

if e.errno != errno.ENOENT:

2327

raise

2328

2623

tempname=stored_state.name

2624

os.rename(tempname, stored_state_path)

2625

except (IOError, OSError) as e:

2626

if not debug:

2627

try:

2628

os.remove(tempname)

2629

except NameError:

2630

pass

2631

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

2632

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

2633

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

2634

else:

2635

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

2636

exc_info=e)

2637

raise e

2638

2329

2639

# Delete all clients, and settings from config

2330

2640

while tcp_server.clients:

2331

2641

name, client = tcp_server.clients.popitem()

2349

2659

# Need to initiate checking of clients

2350

2660

if client.enabled:

2351

2661

client.init_checker()

2352

2353

2662

2354

2663

tcp_server.enable()

2355

2664

tcp_server.server_activate()

2358

2667

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

2359

2668

if use_ipv6:

2360

2669

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

2361

" flowinfo %d, scope_id %d"

2362

% tcp_server.socket.getsockname())

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2363

2672

else: # IPv4

2364

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

2365

% tcp_server.socket.getsockname())

2673

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

2674

*tcp_server.socket.getsockname())

2366

2675

2367

2676

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

2368

2677

2371

2680

try:

2372

2681

service.activate()

2373

2682

except dbus.exceptions.DBusException as error:

2374

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

2683

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

2375

2684

cleanup()

2376

2685

sys.exit(1)

2377

2686

# End of Avahi example code

2384

2693

logger.debug("Starting main loop")

2385

2694

main_loop.run()

2386

2695

except AvahiError as error:

2387

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

2696

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

2388

2697

cleanup()

2389

2698

sys.exit(1)

2390

2699

except KeyboardInterrupt:

2395

2704

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

2396

2705

cleanup()

2397

2706

2398

2399

2707

if __name__ == '__main__':

2400

2708

main()