/mandos/trunk : revision 549

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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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 = "1.6.8"

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version = "1.5.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/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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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.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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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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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 password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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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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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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checker, or None.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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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": "PT0S",

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"approval_duration": "PT1S",

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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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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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% section)

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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client["last_checker_status"] = None

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return settings

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

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

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

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

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attribute."""

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.items():

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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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else:

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self.last_enabled = None

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self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

589

if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(int(self.interval

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.total_seconds() * 1000),

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(int(self.timeout

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.total_seconds() * 1000),

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self.disable))

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

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vars(self))

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def checked_ok(self):

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

636

self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

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

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alive and well.

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"""

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if timeout is None:

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timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(int(timeout.total_seconds()

650

* 1000), self.disable))

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(timedelta_to_milliseconds

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(timeout), self.disable))

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

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def need_approval(self):

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If a checker already exists, leave it running and do

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nothing."""

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

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

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

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# would inevitably timeout, since no checker would get a

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

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

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# should be.

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

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664

try:

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

673

except AttributeError:

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pass

675

except OSError as error:

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if error.errno != errno.ECHILD:

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raise

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except (AttributeError, OSError) as error:

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if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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logger.warning("Checker was a zombie")

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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

687

escaped_attrs = { attr:

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re.escape(unicode(getattr(self,

689

attr)))

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for attr in self.runtime_expansions }

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try:

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command = self.checker_command % escaped_attrs

693

except TypeError as error:

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

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self.checker_command, exc_info=error)

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return True # Try again later

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# In case checker_command has exactly one % operator

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

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

686

errors=

687

'replace')))

688

for attr in

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self.runtime_expansions)

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try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

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return True # Try again later

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self.current_checker_command = command

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try:

699

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

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

703

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

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# always replaced by /dev/null.)

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# The exception is when not debugging but nevertheless

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# running in the foreground; use the previously

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# created wnull.

708

popen_args = {}

709

if (not self.server_settings["debug"]

710

and self.server_settings["foreground"]):

711

popen_args.update({"stdout": wnull,

712

"stderr": wnull })

713

705

self.checker = subprocess.Popen(command,

714

706

close_fds=True,

715

shell=True, cwd="/",

716

**popen_args)

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

728

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

729

718

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

719

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

720

error)

739

721

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

740

722

return True

741

723

748

730

return

749

731

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

750

732

try:

751

self.checker.terminate()

733

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

752

734

#time.sleep(0.5)

753

735

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

754

# self.checker.kill()

736

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

755

737

except OSError as error:

756

738

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

757

739

raise

774

756

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

775

757

if byte_arrays and signature != "ay":

776

758

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

777

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

759

" signature %r" % signature)

778

760

def decorator(func):

779

761

func._dbus_is_property = True

780

762

func._dbus_interface = dbus_interface

788

770

return decorator

789

771

790

772

791

def dbus_interface_annotations(dbus_interface):

792

"""Decorator for marking functions returning interface annotations

793

794

Usage:

795

796

@dbus_interface_annotations("org.example.Interface")

797

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

798

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

799

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

800

"false"}

801

"""

802

def decorator(func):

803

func._dbus_is_interface = True

804

func._dbus_interface = dbus_interface

805

func._dbus_name = dbus_interface

806

return func

807

return decorator

808

809

810

def dbus_annotations(annotations):

811

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

812

Usage:

813

814

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

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

def Property_dbus_property(self):

820

return dbus.Boolean(False)

821

"""

822

def decorator(func):

823

func._dbus_annotations = annotations

824

return func

825

return decorator

826

827

828

773

class DBusPropertyException(dbus.exceptions.DBusException):

829

774

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

830

775

"""

831

pass

776

def __unicode__(self):

777

return unicode(str(self))

778

832

779

833

780

class DBusPropertyAccessException(DBusPropertyException):

834

781

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

851

798

"""

852

799

853

800

@staticmethod

854

def _is_dbus_thing(thing):

855

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

856

857

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

858

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

859

"""

860

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

861

False)

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

862

803

863

def _get_all_dbus_things(self, thing):

804

def _get_all_dbus_properties(self):

864

805

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

865

806

"""

866

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

867

name),

868

athing.__get__(self))

807

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

869

808

for cls in self.__class__.__mro__

870

for name, athing in

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

873

811

874

812

def _get_dbus_property(self, interface_name, property_name):

875

813

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

877

815

"""

878

816

for cls in self.__class__.__mro__:

879

817

for name, value in (inspect.getmembers

880

(cls,

881

self._is_dbus_thing("property"))):

818

(cls, self._is_dbus_property)):

882

819

if (value._dbus_name == property_name

883

820

and value._dbus_interface == interface_name):

884

821

return value.__get__(self)

912

849

# The byte_arrays option is not supported yet on

913

850

# signatures other than "ay".

914

851

if prop._dbus_signature != "ay":

915

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

916

"'ay' signature {!r}"

917

.format(prop._dbus_signature))

852

raise ValueError

918

853

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

919

854

for byte in value))

920

855

prop(value)

928

863

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

929

864

"""

930

865

properties = {}

931

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

866

for name, prop in self._get_all_dbus_properties():

932

867

if (interface_name

933

868

and interface_name != prop._dbus_interface):

934

869

# Interface non-empty but did not match

949

884

path_keyword='object_path',

950

885

connection_keyword='connection')

951

886

def Introspect(self, object_path, connection):

952

"""Overloading of standard D-Bus method.

953

954

Inserts property tags and interface annotation tags.

887

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

955

888

"""

956

889

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

957

890

connection)

964

897

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

965

898

return e

966

899

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

967

# Add property tags

968

900

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

969

901

for name, prop

970

in self._get_all_dbus_things("property")

902

in self._get_all_dbus_properties()

971

903

if prop._dbus_interface

972

904

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

973

905

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.items():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().items()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).items():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

1005

906

# Add the names to the return values for the

1006

907

# "org.freedesktop.DBus.Properties" methods

1007

908

if (if_tag.getAttribute("name")

1022

923

except (AttributeError, xml.dom.DOMException,

1023

924

xml.parsers.expat.ExpatError) as error:

1024

925

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

1025

exc_info=error)

926

error)

1026

927

return xmlstring

1027

928

1028

929

1029

def datetime_to_dbus(dt, variant_level=0):

930

def datetime_to_dbus (dt, variant_level=0):

1030

931

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

1031

932

if dt is None:

1032

933

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

1034

935

variant_level=variant_level)

1035

936

1036

937

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1038

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

1039

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

1040

interface names according to the "alt_interface_names" mapping.

1041

Usage:

1042

1043

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

1044

"net.example.AlternateInterface"})

1045

class SampleDBusObject(dbus.service.Object):

1046

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

1047

def SampleDBusMethod():

1048

pass

1049

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

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

1052

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

1053

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

1054

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

1055

1056

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

1057

(from DBusObjectWithProperties) and interfaces (from the

1058

dbus_interface_annotations decorator).

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

1059

942

"""

1060

def wrapper(cls):

1061

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.items()):

1063

attr = {}

1064

interface_names = set()

1065

# Go though all attributes of the class

1066

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

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

1067

950

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

1068

951

# with the wrong interface name

1069

952

if (not hasattr(attribute, "_dbus_interface")

1070

953

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

954

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

1072

955

continue

1073

956

# Create an alternate D-Bus interface name based on

1074

957

# the current name

1075

958

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1078

interface_names.add(alt_interface)

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1079

961

# Is this a D-Bus signal?

1080

962

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

1081

# Extract the original non-method undecorated

1082

# function by black magic

963

# Extract the original non-method function by

964

# black magic

1083

965

nonmethod_func = (dict(

1084

966

zip(attribute.func_code.co_freevars,

1085

967

attribute.__closure__))["func"]

1096

978

nonmethod_func.func_name,

1097

979

nonmethod_func.func_defaults,

1098

980

nonmethod_func.func_closure)))

1099

# Copy annotations, if any

1100

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1103

except AttributeError:

1104

pass

1105

981

# Define a creator of a function to call both the

1106

# original and alternate functions, so both the

1107

# original and alternate signals gets sent when

1108

# the function is called

982

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

983

# signals gets sent when the function is called

1109

984

def fixscope(func1, func2):

1110

985

"""This function is a scope container to pass

1111

986

func1 and func2 to the "call_both" function

1118

993

return call_both

1119

994

# Create the "call_both" function and add it to

1120

995

# the class

1121

attr[attrname] = fixscope(attribute, new_function)

996

attr[attrname] = fixscope(attribute,

997

new_function)

1122

998

# Is this a D-Bus method?

1123

999

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

1124

1000

# Create a new, but exactly alike, function

1135

1011

attribute.func_name,

1136

1012

attribute.func_defaults,

1137

1013

attribute.func_closure)))

1138

# Copy annotations, if any

1139

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1142

except AttributeError:

1143

pass

1144

1014

# Is this a D-Bus property?

1145

1015

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

1146

1016

# Create a new, but exactly alike, function

1160

1030

attribute.func_name,

1161

1031

attribute.func_defaults,

1162

1032

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus interface?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

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

1174

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

if deprecate:

1184

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{}"

1186

for interface_name in interface_names:

1187

@dbus_interface_annotations(interface_name)

1188

def func(self):

1189

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

1190

"true" }

1191

# Find an unused name

1192

for aname in (iname.format(i)

1193

for i in itertools.count()):

1194

if aname not in attr:

1195

attr[aname] = func

1196

break

1197

if interface_names:

1198

# Replace the class with a new subclass of it with

1199

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

1202

return cls

1203

return wrapper

1204

1205

1206

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

1207

"se.bsnet.fukt.Mandos"})

1033

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

1034

1035

1208

1036

class ClientDBus(Client, DBusObjectWithProperties):

1209

1037

"""A Client class using D-Bus

1210

1038

1221

1049

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

1222

1050

self.bus = bus

1223

1051

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1224

1055

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

1225

1056

# the D-Bus

1226

1057

client_object_name = unicode(self.name).translate(

1230

1061

("/clients/" + client_object_name))

1231

1062

DBusObjectWithProperties.__init__(self, self.bus,

1232

1063

self.dbus_object_path)

1233

1064

1234

1065

def notifychangeproperty(transform_func,

1235

1066

dbus_name, type_func=lambda x: x,

1236

1067

variant_level=1):

1244

1075

to the D-Bus. Default: no transform

1245

1076

variant_level: D-Bus variant level. Default: 1

1246

1077

"""

1247

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

1078

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

1248

1079

def setter(self, value):

1249

1080

if hasattr(self, "dbus_object_path"):

1250

1081

if (not hasattr(self, attrname) or

1259

1090

1260

1091

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

1261

1092

1093

1262

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1263

1095

approvals_pending = notifychangeproperty(dbus.Boolean,

1264

1096

"ApprovalPending",

1271

1103

checker is not None)

1272

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

1105

"LastCheckedOK")

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1275

"LastCheckerStatus")

1276

1106

last_approval_request = notifychangeproperty(

1277

1107

datetime_to_dbus, "LastApprovalRequest")

1278

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1280

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1281

1111

"ApprovalDelay",

1282

1112

type_func =

1283

lambda td: td.total_seconds()

1284

* 1000)

1113

timedelta_to_milliseconds)

1285

1114

approval_duration = notifychangeproperty(

1286

1115

dbus.UInt64, "ApprovalDuration",

1287

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

1116

type_func = timedelta_to_milliseconds)

1288

1117

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

1289

1118

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

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1119

type_func =

1120

timedelta_to_milliseconds)

1292

1121

extended_timeout = notifychangeproperty(

1293

1122

dbus.UInt64, "ExtendedTimeout",

1294

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

1123

type_func = timedelta_to_milliseconds)

1295

1124

interval = notifychangeproperty(dbus.UInt64,

1296

1125

"Interval",

1297

1126

type_func =

1298

lambda td: td.total_seconds()

1299

* 1000)

1127

timedelta_to_milliseconds)

1300

1128

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

1301

1129

1302

1130

del notifychangeproperty

1330

1158

*args, **kwargs)

1331

1159

1332

1160

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

1333

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1334

1166

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

1335

1167

# Only if new checker process was started

1336

1168

if (self.checker is not None

1344

1176

return False

1345

1177

1346

1178

def approve(self, value=True):

1179

self.send_changedstate()

1347

1180

self.approved = value

1348

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

1349

* 1000), self._reset_approved)

1350

self.send_changedstate()

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1351

1185

1352

1186

## D-Bus methods, signals & properties

1353

1187

_interface = "se.recompile.Mandos.Client"

1354

1188

1355

## Interfaces

1356

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1362

1189

## Signals

1363

1190

1364

1191

# CheckerCompleted - signal

1400

1227

"D-Bus signal"

1401

1228

return self.need_approval()

1402

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1403

1238

## Methods

1404

1239

1405

1240

# Approve - method

1455

1290

access="readwrite")

1456

1291

def ApprovalDelay_dbus_property(self, value=None):

1457

1292

if value is None: # get

1458

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

1459

* 1000)

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1460

1294

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

1461

1295

1462

1296

# ApprovalDuration - property

1464

1298

access="readwrite")

1465

1299

def ApprovalDuration_dbus_property(self, value=None):

1466

1300

if value is None: # get

1467

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

1468

* 1000)

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1469

1303

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

1470

1304

1471

1305

# Name - property

1516

1350

return

1517

1351

return datetime_to_dbus(self.last_checked_ok)

1518

1352

1519

# LastCheckerStatus - property

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

1522

def LastCheckerStatus_dbus_property(self):

1523

return dbus.Int16(self.last_checker_status)

1524

1525

1353

# Expires - property

1526

1354

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

1527

1355

def Expires_dbus_property(self):

1537

1365

access="readwrite")

1538

1366

def Timeout_dbus_property(self, value=None):

1539

1367

if value is None: # get

1540

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

1541

old_timeout = self.timeout

1368

return dbus.UInt64(self.timeout_milliseconds())

1542

1369

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

1543

# Reschedule disabling

1370

# Reschedule timeout

1544

1371

if self.enabled:

1545

1372

now = datetime.datetime.utcnow()

1546

self.expires += self.timeout - old_timeout

1547

if self.expires <= now:

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

1548

1376

# The timeout has passed

1549

1377

self.disable()

1550

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1551

1382

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

1552

1383

is None):

1553

1384

return

1554

1385

gobject.source_remove(self.disable_initiator_tag)

1555

self.disable_initiator_tag = (

1556

gobject.timeout_add(

1557

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

1558

* 1000), self.disable))

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1559

1389

1560

1390

# ExtendedTimeout - property

1561

1391

@dbus_service_property(_interface, signature="t",

1562

1392

access="readwrite")

1563

1393

def ExtendedTimeout_dbus_property(self, value=None):

1564

1394

if value is None: # get

1565

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

1566

* 1000)

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

1567

1396

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

1568

1397

1569

1398

# Interval - property

1571

1400

access="readwrite")

1572

1401

def Interval_dbus_property(self, value=None):

1573

1402

if value is None: # get

1574

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

1403

return dbus.UInt64(self.interval_milliseconds())

1575

1404

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

1576

1405

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

1577

1406

return

1610

1439

@dbus_service_property(_interface, signature="ay",

1611

1440

access="write", byte_arrays=True)

1612

1441

def Secret_dbus_property(self, value):

1613

self.secret = bytes(value)

1442

self.secret = str(value)

1614

1443

1615

1444

del _interface

1616

1445

1641

1470

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

1642

1471

1643

1472

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1644

1477

class ClientHandler(socketserver.BaseRequestHandler, object):

1645

1478

"""A class to handle client connections.

1646

1479

1682

1515

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

1683

1516

try:

1684

1517

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

1685

raise RuntimeError(line)

1518

raise RuntimeError

1686

1519

except (ValueError, IndexError, RuntimeError) as error:

1687

1520

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

1688

1521

return

1714

1547

except KeyError:

1715

1548

return

1716

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1717

1554

if client.approval_delay:

1718

1555

delay = client.approval_delay

1719

1556

client.approvals_pending += 1

1737

1574

if self.server.use_dbus:

1738

1575

# Emit D-Bus signal

1739

1576

client.NeedApproval(

1740

client.approval_delay.total_seconds()

1741

* 1000, client.approved_by_default)

1577

client.approval_delay_milliseconds(),

1578

client.approved_by_default)

1742

1579

else:

1743

1580

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

1744

1581

client.name)

1750

1587

#wait until timeout or approved

1751

1588

time = datetime.datetime.now()

1752

1589

client.changedstate.acquire()

1753

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

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1754

1593

client.changedstate.release()

1755

1594

time2 = datetime.datetime.now()

1756

1595

if (time2 - time) >= delay:

1772

1611

try:

1773

1612

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

1774

1613

except gnutls.errors.GNUTLSError as error:

1775

logger.warning("gnutls send failed",

1776

exc_info=error)

1614

logger.warning("gnutls send failed")

1777

1615

return

1778

1616

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

1779

1617

sent, len(client.secret)

1782

1620

1783

1621

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

1784

1622

# bump the timeout using extended_timeout

1785

client.bump_timeout(client.extended_timeout)

1623

client.checked_ok(client.extended_timeout)

1786

1624

if self.server.use_dbus:

1787

1625

# Emit D-Bus signal

1788

1626

client.GotSecret()

1793

1631

try:

1794

1632

session.bye()

1795

1633

except gnutls.errors.GNUTLSError as error:

1796

logger.warning("GnuTLS bye failed",

1797

exc_info=error)

1634

logger.warning("GnuTLS bye failed")

1798

1635

1799

1636

@staticmethod

1800

1637

def peer_certificate(session):

1872

1709

def process_request(self, request, address):

1873

1710

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

1874

1711

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

1875

args = (request, address))

1712

args = (request,

1713

address))

1876

1714

proc.start()

1877

1715

return proc

1878

1716

1893

1731

1894

1732

def add_pipe(self, parent_pipe, proc):

1895

1733

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

1896

raise NotImplementedError()

1734

raise NotImplementedError

1897

1735

1898

1736

1899

1737

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1906

1744

use_ipv6: Boolean; to use IPv6 or not

1907

1745

"""

1908

1746

def __init__(self, server_address, RequestHandlerClass,

1909

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

1910

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

1911

creating a new one with socket.socket().

1912

"""

1747

interface=None, use_ipv6=True):

1913

1748

self.interface = interface

1914

1749

if use_ipv6:

1915

1750

self.address_family = socket.AF_INET6

1916

if socketfd is not None:

1917

# Save the file descriptor

1918

self.socketfd = socketfd

1919

# Save the original socket.socket() function

1920

self.socket_socket = socket.socket

1921

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

1922

#

1923

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

1924

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

1925

# patching socket.socket.)

1926

#

1927

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

1928

@functools.wraps(socket.socket)

1929

def socket_wrapper(*args, **kwargs):

1930

# Restore original function so subsequent calls are

1931

# not affected.

1932

socket.socket = self.socket_socket

1933

del self.socket_socket

1934

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

1935

# saved file descriptor.

1936

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

1937

# Replace socket.socket() function with wrapper

1938

socket.socket = socket_wrapper

1939

# The socketserver.TCPServer.__init__ will call

1940

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

1941

# socket_wrapper(), if socketfd was set.

1942

1751

socketserver.TCPServer.__init__(self, server_address,

1943

1752

RequestHandlerClass)

1944

1945

1753

def server_bind(self):

1946

1754

"""This overrides the normal server_bind() function

1947

1755

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

1955

1763

try:

1956

1764

self.socket.setsockopt(socket.SOL_SOCKET,

1957

1765

SO_BINDTODEVICE,

1958

(self.interface + "\0")

1959

.encode("utf-8"))

1766

str(self.interface

1767

+ '\0'))

1960

1768

except socket.error as error:

1961

if error.errno == errno.EPERM:

1962

logger.error("No permission to bind to"

1963

" interface %s", self.interface)

1964

elif error.errno == errno.ENOPROTOOPT:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1965

1774

logger.error("SO_BINDTODEVICE not available;"

1966

1775

" cannot bind to interface %s",

1967

1776

self.interface)

1968

elif error.errno == errno.ENODEV:

1969

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

1970

" cannot bind", self.interface)

1971

1777

else:

1972

1778

raise

1973

1779

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

1976

1782

if self.address_family == socket.AF_INET6:

1977

1783

any_address = "::" # in6addr_any

1978

1784

else:

1979

any_address = "0.0.0.0" # INADDR_ANY

1785

any_address = socket.INADDR_ANY

1980

1786

self.server_address = (any_address,

1981

1787

self.server_address[1])

1982

1788

elif not self.server_address[1]:

2003

1809

"""

2004

1810

def __init__(self, server_address, RequestHandlerClass,

2005

1811

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

2006

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

1812

gnutls_priority=None, use_dbus=True):

2007

1813

self.enabled = False

2008

1814

self.clients = clients

2009

1815

if self.clients is None:

2013

1819

IPv6_TCPServer.__init__(self, server_address,

2014

1820

RequestHandlerClass,

2015

1821

interface = interface,

2016

use_ipv6 = use_ipv6,

2017

socketfd = socketfd)

1822

use_ipv6 = use_ipv6)

2018

1823

def server_activate(self):

2019

1824

if self.enabled:

2020

1825

return socketserver.TCPServer.server_activate(self)

2033

1838

2034

1839

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

2035

1840

proc = None, client_object=None):

1841

condition_names = {

1842

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

1843

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

1844

# blocking).

1845

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

1846

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

1847

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

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

2036

1855

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

2037

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

1856

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

2038

1857

# Wait for other process to exit

2039

1858

proc.join()

2040

1859

return False

2098

1917

return True

2099

1918

2100

1919

2101

def rfc3339_duration_to_delta(duration):

2102

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

2103

2104

>>> rfc3339_duration_to_delta("P7D")

2105

datetime.timedelta(7)

2106

>>> rfc3339_duration_to_delta("PT60S")

2107

datetime.timedelta(0, 60)

2108

>>> rfc3339_duration_to_delta("PT60M")

2109

datetime.timedelta(0, 3600)

2110

>>> rfc3339_duration_to_delta("PT24H")

2111

datetime.timedelta(1)

2112

>>> rfc3339_duration_to_delta("P1W")

2113

datetime.timedelta(7)

2114

>>> rfc3339_duration_to_delta("PT5M30S")

2115

datetime.timedelta(0, 330)

2116

>>> rfc3339_duration_to_delta("P1DT3M20S")

2117

datetime.timedelta(1, 200)

2118

"""

2119

2120

# Parsing an RFC 3339 duration with regular expressions is not

2121

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

2122

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

2123

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

2124

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

2125

# avoid excessive use of external libraries.

2126

2127

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

2128

Token = collections.namedtuple("Token",

2129

("regexp", # To match token; if

2130

# "value" is not None,

2131

# must have a "group"

2132

# containing digits

2133

"value", # datetime.timedelta or

2134

# None

2135

"followers")) # Tokens valid after

2136

# this token

2137

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

2138

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

2139

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

2140

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

2141

datetime.timedelta(seconds=1),

2142

frozenset((token_end,)))

2143

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

2144

datetime.timedelta(minutes=1),

2145

frozenset((token_second, token_end)))

2146

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

2147

datetime.timedelta(hours=1),

2148

frozenset((token_minute, token_end)))

2149

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

2150

None,

2151

frozenset((token_hour, token_minute,

2152

token_second)))

2153

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

2154

datetime.timedelta(days=1),

2155

frozenset((token_time, token_end)))

2156

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

2157

datetime.timedelta(weeks=4),

2158

frozenset((token_day, token_end)))

2159

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

2160

datetime.timedelta(weeks=52),

2161

frozenset((token_month, token_end)))

2162

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

2163

datetime.timedelta(weeks=1),

2164

frozenset((token_end,)))

2165

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

2166

frozenset((token_year, token_month,

2167

token_day, token_time,

2168

token_week)))

2169

# Define starting values

2170

value = datetime.timedelta() # Value so far

2171

found_token = None

2172

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

2173

s = duration # String left to parse

2174

# Loop until end token is found

2175

while found_token is not token_end:

2176

# Search for any currently valid tokens

2177

for token in followers:

2178

match = token.regexp.match(s)

2179

if match is not None:

2180

# Token found

2181

if token.value is not None:

2182

# Value found, parse digits

2183

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

2184

# Add to value so far

2185

value += factor * token.value

2186

# Strip token from string

2187

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

2188

# Go to found token

2189

found_token = token

2190

# Set valid next tokens

2191

followers = found_token.followers

2192

break

2193

else:

2194

# No currently valid tokens were found

2195

raise ValueError("Invalid RFC 3339 duration")

2196

# End token found

2197

return value

2198

2199

2200

1920

def string_to_delta(interval):

2201

1921

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

2202

1922

2213

1933

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

2214

1934

datetime.timedelta(0, 330)

2215

1935

"""

2216

2217

try:

2218

return rfc3339_duration_to_delta(interval)

2219

except ValueError:

2220

pass

2221

2222

1936

timevalue = datetime.timedelta(0)

2223

1937

for s in interval.split():

2224

1938

try:

2225

suffix = s[-1]

1939

suffix = unicode(s[-1])

2226

1940

value = int(s[:-1])

2227

1941

if suffix == "d":

2228

1942

delta = datetime.timedelta(value)

2235

1949

elif suffix == "w":

2236

1950

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

2237

1951

else:

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2240

except IndexError as e:

1952

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

1953

except (ValueError, IndexError) as e:

2241

1954

raise ValueError(*(e.args))

2242

1955

timevalue += delta

2243

1956

return timevalue

2256

1969

sys.exit()

2257

1970

if not noclose:

2258

1971

# Close all standard open file descriptors

2259

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

1972

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

2260

1973

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

2261

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

2262

.format(os.devnull))

1974

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1976

% os.path.devnull)

2263

1977

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

2264

1978

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

2265

1979

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

2274

1988

2275

1989

parser = argparse.ArgumentParser()

2276

1990

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

2277

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

1991

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

2278

1992

help="show version number and exit")

2279

1993

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

2280

1994

help="Bind to interface IF")

2286

2000

help="Run self-test")

2287

2001

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

2288

2002

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

2289

" to terminal", default=None)

2003

" to terminal")

2290

2004

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

2291

2005

help="Debug level for stdout output")

2292

2006

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

2299

2013

" files")

2300

2014

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

2301

2015

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

2302

" system bus interface", default=None)

2016

" system bus interface")

2303

2017

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

2304

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

2305

default=None)

2018

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

2306

2019

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

2307

2020

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

2308

" state", default=None)

2309

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

2310

help="Specify a file descriptor to a network"

2311

" socket to use instead of creating one")

2021

" state")

2312

2022

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

2313

2023

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

2314

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

2315

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

2316

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

2317

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

2318

default=None)

2319

2024

2320

2025

options = parser.parse_args()

2321

2026

2322

2027

if options.check:

2323

2028

import doctest

2324

fail_count, test_count = doctest.testmod()

2325

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

2029

doctest.testmod()

2030

sys.exit()

2326

2031

2327

2032

# Default values for config file for server-global settings

2328

2033

server_defaults = { "interface": "",

2330

2035

"port": "",

2331

2036

"debug": "False",

2332

2037

"priority":

2333

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

2038

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

2334

2039

"servicename": "Mandos",

2335

2040

"use_dbus": "True",

2336

2041

"use_ipv6": "True",

2337

2042

"debuglevel": "",

2338

2043

"restore": "True",

2339

"socket": "",

2340

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

2341

"foreground": "False",

2342

"zeroconf": "True",

2044

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

2343

2045

}

2344

2046

2345

2047

# Parse config file for server-global settings

2350

2052

# Convert the SafeConfigParser object to a dict

2351

2053

server_settings = server_config.defaults()

2352

2054

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

2353

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

2055

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

2354

2056

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

2355

2057

option)

2356

2058

if server_settings["port"]:

2357

2059

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

2358

2060

"port")

2359

if server_settings["socket"]:

2360

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

2361

"socket")

2362

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

2363

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

2364

# happen with a supplied network socket.

2365

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

2366

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

2367

["socket"])

2368

2061

del server_config

2369

2062

2370

2063

# Override the settings from the config file with command line

2372

2065

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

2373

2066

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

2374

2067

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

2375

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

2068

"statedir"):

2376

2069

value = getattr(options, option)

2377

2070

if value is not None:

2378

2071

server_settings[option] = value

2379

2072

del options

2380

2073

# Force all strings to be unicode

2381

2074

for option in server_settings.keys():

2382

if isinstance(server_settings[option], bytes):

2383

server_settings[option] = (server_settings[option]

2384

.decode("utf-8"))

2385

# Force all boolean options to be boolean

2386

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

2387

"foreground", "zeroconf"):

2388

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

2389

# Debug implies foreground

2390

if server_settings["debug"]:

2391

server_settings["foreground"] = True

2075

if type(server_settings[option]) is str:

2076

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

2392

2077

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

2393

2078

2394

2079

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

2395

2080

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

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

2399

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

2400

" Zeroconf")

2401

2402

2081

# For convenience

2403

2082

debug = server_settings["debug"]

2404

2083

debuglevel = server_settings["debuglevel"]

2406

2085

use_ipv6 = server_settings["use_ipv6"]

2407

2086

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

2408

2087

stored_state_file)

2409

foreground = server_settings["foreground"]

2410

zeroconf = server_settings["zeroconf"]

2411

2088

2412

2089

if debug:

2413

2090

initlogger(debug, logging.DEBUG)

2420

2097

2421

2098

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

2422

2099

syslogger.setFormatter(logging.Formatter

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2100

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

2101

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

2102

% server_settings["servicename"]))

2427

2103

2428

2104

# Parse config file with clients

2429

2105

client_config = configparser.SafeConfigParser(Client

2434

2110

global mandos_dbus_service

2435

2111

mandos_dbus_service = None

2436

2112

2437

socketfd = None

2438

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

2439

socketfd = server_settings["socket"]

2440

2113

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

2441

2114

server_settings["port"]),

2442

2115

ClientHandler,

2445

2118

use_ipv6=use_ipv6,

2446

2119

gnutls_priority=

2447

2120

server_settings["priority"],

2448

use_dbus=use_dbus,

2449

socketfd=socketfd)

2450

if not foreground:

2451

pidfilename = "/run/mandos.pid"

2452

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

2453

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

2454

pidfile = None

2121

use_dbus=use_dbus)

2122

if not debug:

2123

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

2455

2124

try:

2456

2125

pidfile = open(pidfilename, "w")

2457

except IOError as e:

2458

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

2459

exc_info=e)

2126

except IOError:

2127

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

2460

2128

2461

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

2129

try:

2130

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

2131

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

2132

except KeyError:

2462

2133

try:

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2134

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

2135

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

2466

2136

except KeyError:

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2137

try:

2138

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

2139

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

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

2471

2143

try:

2472

2144

os.setgid(gid)

2473

2145

os.setuid(uid)

2474

2146

except OSError as error:

2475

if error.errno != errno.EPERM:

2476

raise

2147

if error[0] != errno.EPERM:

2148

raise error

2477

2149

2478

2150

if debug:

2479

2151

# Enable all possible GnuTLS debugging

2490

2162

.gnutls_global_set_log_function(debug_gnutls))

2491

2163

2492

2164

# Redirect stdin so all checkers get /dev/null

2493

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

2165

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

2494

2166

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

2495

2167

if null > 2:

2496

2168

os.close(null)

2497

2169

2498

2170

# Need to fork before connecting to D-Bus

2499

if not foreground:

2171

if not debug:

2500

2172

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

2501

2173

daemon()

2502

2174

2503

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

2504

# need to inform gobject that threads will be used.

2505

2175

gobject.threads_init()

2506

2176

2507

2177

global main_loop

2508

2178

# From the Avahi example code

2509

DBusGMainLoop(set_as_default=True)

2179

DBusGMainLoop(set_as_default=True )

2510

2180

main_loop = gobject.MainLoop()

2511

2181

bus = dbus.SystemBus()

2512

2182

# End of Avahi example code

2518

2188

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

2519

2189

do_not_queue=True))

2520

2190

except dbus.exceptions.NameExistsException as e:

2521

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

2191

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

2522

2192

use_dbus = False

2523

2193

server_settings["use_dbus"] = False

2524

2194

tcp_server.use_dbus = False

2525

if zeroconf:

2526

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

2531

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

2200

if server_settings["interface"]:

2201

service.interface = (if_nametoindex

2202

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

2535

2203

2536

2204

global multiprocessing_manager

2537

2205

multiprocessing_manager = multiprocessing.Manager()

2538

2206

2539

2207

client_class = Client

2540

2208

if use_dbus:

2541

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

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2542

2211

2543

2212

client_settings = Client.config_parser(client_config)

2544

2213

old_client_settings = {}

2545

2214

clients_data = {}

2546

2215

2547

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

2548

global wnull

2549

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

2550

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

2551

# mode

2552

if debug or not foreground:

2553

wnull.close()

2554

2555

2216

# Get client data and settings from last running state.

2556

2217

if server_settings["restore"]:

2557

2218

try:

2560

2221

(stored_state))

2561

2222

os.remove(stored_state_path)

2562

2223

except IOError as e:

2563

if e.errno == errno.ENOENT:

2564

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

2565

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

2566

else:

2567

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

2568

exc_info=e)

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2569

2227

raise

2570

2228

except EOFError as e:

2571

2229

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

2572

"EOFError:", exc_info=e)

2230

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

2573

2231

2574

2232

with PGPEngine() as pgp:

2575

for client_name, client in clients_data.items():

2576

# Skip removed clients

2577

if client_name not in client_settings:

2578

continue

2579

2233

for client_name, client in clients_data.iteritems():

2580

2234

# Decide which value to use after restoring saved state.

2581

2235

# We have three different values: Old config file,

2582

2236

# new config file, and saved state.

2596

2250

2597

2251

# Clients who has passed its expire date can still be

2598

2252

# enabled if its last checker was successful. Clients

2599

# whose checker succeeded before we stored its state is

2600

# assumed to have successfully run all checkers during

2601

# downtime.

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2602

2255

if client["enabled"]:

2603

2256

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

2604

2257

if not client["last_checked_ok"]:

2605

2258

logger.warning(

2606

"disabling client {} - Client never "

2607

"performed a successful checker"

2608

.format(client_name))

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2609

2262

client["enabled"] = False

2610

2263

elif client["last_checker_status"] != 0:

2611

2264

logger.warning(

2612

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2614

.format(client_name,

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2615

2268

client["last_checker_status"]))

2616

2269

client["enabled"] = False

2617

2270

else:

2619

2272

.utcnow()

2620

2273

+ client["timeout"])

2621

2274

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2623

.format(client_name))

2275

" keeping {0} enabled"

2276

.format(client["name"]))

2624

2277

try:

2625

2278

client["secret"] = (

2626

2279

pgp.decrypt(client["encrypted_secret"],

2628

2281

["secret"]))

2629

2282

except PGPError:

2630

2283

# If decryption fails, we use secret from new settings

2631

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

2284

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

2632

2285

.format(client_name))

2633

2286

client["secret"] = (

2634

2287

client_settings[client_name]["secret"])

2288

2635

2289

2636

2290

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

2637

2291

for client_name in (set(old_client_settings)

2640

2294

for client_name in (set(client_settings)

2641

2295

- set(old_client_settings)):

2642

2296

clients_data[client_name] = client_settings[client_name]

2643

2644

# Create all client objects

2645

for client_name, client in clients_data.items():

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2646

2300

tcp_server.clients[client_name] = client_class(

2647

name = client_name, settings = client,

2648

server_settings = server_settings)

2301

name = client_name, settings = client)

2649

2302

2650

2303

if not tcp_server.clients:

2651

2304

logger.warning("No clients defined")

2652

2653

if not foreground:

2654

if pidfile is not None:

2655

try:

2656

with pidfile:

2657

pid = os.getpid()

2658

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

2659

except IOError:

2660

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

2661

pidfilename, pid)

2662

del pidfile

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

2663

2318

del pidfilename

2319

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

2664

2320

2665

2321

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

2666

2322

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

2667

2323

2668

2324

if use_dbus:

2669

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

2670

"se.bsnet.fukt.Mandos"})

2671

class MandosDBusService(DBusObjectWithProperties):

2325

class MandosDBusService(dbus.service.Object):

2672

2326

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

2673

2327

def __init__(self):

2674

2328

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

2675

2329

_interface = "se.recompile.Mandos"

2676

2330

2677

@dbus_interface_annotations(_interface)

2678

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2682

2683

2331

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

2684

2332

def ClientAdded(self, objpath):

2685

2333

"D-Bus signal"

2727

2375

2728

2376

del _interface

2729

2377

2730

mandos_dbus_service = MandosDBusService()

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2731

2381

2732

2382

def cleanup():

2733

2383

"Cleanup function; run on exit"

2734

if zeroconf:

2735

service.cleanup()

2384

service.cleanup()

2736

2385

2737

2386

multiprocessing.active_children()

2738

wnull.close()

2739

2387

if not (tcp_server.clients or client_settings):

2740

2388

return

2741

2389

2752

2400

2753

2401

# A list of attributes that can not be pickled

2754

2402

# + secret.

2755

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

2756

"checker", "server_settings" }

2403

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

2404

"checker"))

2757

2405

for name, typ in (inspect.getmembers

2758

2406

(dbus.service.Object)):

2759

2407

exclude.add(name)

2768

2416

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

2769

2417

2770

2418

try:

2771

with (tempfile.NamedTemporaryFile

2772

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

2773

dir=os.path.dirname(stored_state_path),

2774

delete=False)) as stored_state:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2775

2424

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

2776

tempname=stored_state.name

2777

2425

os.rename(tempname, stored_state_path)

2778

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2779

2429

if not debug:

2780

2430

try:

2781

2431

os.remove(tempname)

2782

2432

except NameError:

2783

2433

pass

2784

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

2785

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

2786

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

2787

else:

2788

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

2789

exc_info=e)

2790

raise

2434

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

2435

errno.EEXIST)):

2436

raise e

2791

2437

2792

2438

# Delete all clients, and settings from config

2793

2439

while tcp_server.clients:

2817

2463

tcp_server.server_activate()

2818

2464

2819

2465

# Find out what port we got

2820

if zeroconf:

2821

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

2466

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

2822

2467

if use_ipv6:

2823

2468

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

2824

" flowinfo %d, scope_id %d",

2825

*tcp_server.socket.getsockname())

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

2826

2471

else: # IPv4

2827

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

2828

*tcp_server.socket.getsockname())

2472

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

2473

% tcp_server.socket.getsockname())

2829

2474

2830

2475

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

2831

2476

2832

2477

try:

2833

if zeroconf:

2834

# From the Avahi example code

2835

try:

2836

service.activate()

2837

except dbus.exceptions.DBusException as error:

2838

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

2839

cleanup()

2840

sys.exit(1)

2841

# End of Avahi example code

2478

# From the Avahi example code

2479

try:

2480

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

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

2483

cleanup()

2484

sys.exit(1)

2485

# End of Avahi example code

2842

2486

2843

2487

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

2844

2488

lambda *args, **kwargs:

2848

2492

logger.debug("Starting main loop")

2849

2493

main_loop.run()

2850

2494

except AvahiError as error:

2851

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

2495

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

2852

2496

cleanup()

2853

2497

sys.exit(1)

2854

2498

except KeyboardInterrupt: