/mandos/trunk

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  • Committer: Björn Påhlsson
  • Date: 2008-07-20 02:52:20 UTC
  • Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
       Avahi instead of udp server discovery
       openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server

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1
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
12
 
13
 
# Everything else is
14
 
# Copyright © 2008-2013 Teddy Hogeborn
15
 
# Copyright © 2008-2013 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
40
6
import socket
41
 
import argparse
 
7
import select
 
8
from optparse import OptionParser
42
9
import datetime
43
10
import errno
44
11
import gnutls.crypto
47
14
import gnutls.library.functions
48
15
import gnutls.library.constants
49
16
import gnutls.library.types
50
 
import ConfigParser as configparser
 
17
import ConfigParser
51
18
import sys
52
19
import re
53
20
import os
54
21
import signal
 
22
from sets import Set
55
23
import subprocess
56
 
import atexit
57
 
import stat
58
 
import logging
59
 
import logging.handlers
60
 
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
72
24
 
73
25
import dbus
74
 
import dbus.service
75
26
import gobject
76
27
import avahi
77
28
from dbus.mainloop.glib import DBusGMainLoop
78
29
import ctypes
79
 
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
version = "1.6.1"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
95
 
syslogger = (logging.handlers.SysLogHandler
96
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
 
              address = str("/dev/log")))
98
 
 
99
 
try:
100
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
101
 
                      (ctypes.util.find_library("c"))
102
 
                      .if_nametoindex)
103
 
except (OSError, AttributeError):
104
 
    def if_nametoindex(interface):
105
 
        "Get an interface index the hard way, i.e. using fcntl()"
106
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
107
 
        with contextlib.closing(socket.socket()) as s:
108
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
 
                                struct.pack(str("16s16x"),
110
 
                                            interface))
111
 
        interface_index = struct.unpack(str("I"),
112
 
                                        ifreq[16:20])[0]
113
 
        return interface_index
114
 
 
115
 
 
116
 
def initlogger(debug, level=logging.WARNING):
117
 
    """init logger and add loglevel"""
118
 
    
119
 
    syslogger.setFormatter(logging.Formatter
120
 
                           ('Mandos [%(process)d]: %(levelname)s:'
121
 
                            ' %(message)s'))
122
 
    logger.addHandler(syslogger)
123
 
    
124
 
    if debug:
125
 
        console = logging.StreamHandler()
126
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
 
                                               ' [%(process)d]:'
128
 
                                               ' %(levelname)s:'
129
 
                                               ' %(message)s'))
130
 
        logger.addHandler(console)
131
 
    logger.setLevel(level)
132
 
 
133
 
 
134
 
class PGPError(Exception):
135
 
    """Exception if encryption/decryption fails"""
136
 
    pass
137
 
 
138
 
 
139
 
class PGPEngine(object):
140
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
141
 
    def __init__(self):
142
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
 
        self.gnupgargs = ['--batch',
144
 
                          '--home', self.tempdir,
145
 
                          '--force-mdc',
146
 
                          '--quiet',
147
 
                          '--no-use-agent']
148
 
    
149
 
    def __enter__(self):
150
 
        return self
151
 
    
152
 
    def __exit__(self, exc_type, exc_value, traceback):
153
 
        self._cleanup()
154
 
        return False
155
 
    
156
 
    def __del__(self):
157
 
        self._cleanup()
158
 
    
159
 
    def _cleanup(self):
160
 
        if self.tempdir is not None:
161
 
            # Delete contents of tempdir
162
 
            for root, dirs, files in os.walk(self.tempdir,
163
 
                                             topdown = False):
164
 
                for filename in files:
165
 
                    os.remove(os.path.join(root, filename))
166
 
                for dirname in dirs:
167
 
                    os.rmdir(os.path.join(root, dirname))
168
 
            # Remove tempdir
169
 
            os.rmdir(self.tempdir)
170
 
            self.tempdir = None
171
 
    
172
 
    def password_encode(self, password):
173
 
        # Passphrase can not be empty and can not contain newlines or
174
 
        # NUL bytes.  So we prefix it and hex encode it.
175
 
        encoded = b"mandos" + binascii.hexlify(password)
176
 
        if len(encoded) > 2048:
177
 
            # GnuPG can't handle long passwords, so encode differently
178
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
 
                       .replace(b"\n", b"\\n")
180
 
                       .replace(b"\0", b"\\x00"))
181
 
        return encoded
182
 
    
183
 
    def encrypt(self, data, password):
184
 
        passphrase = self.password_encode(password)
185
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
186
 
                                         ) as passfile:
187
 
            passfile.write(passphrase)
188
 
            passfile.flush()
189
 
            proc = subprocess.Popen(['gpg', '--symmetric',
190
 
                                     '--passphrase-file',
191
 
                                     passfile.name]
192
 
                                    + self.gnupgargs,
193
 
                                    stdin = subprocess.PIPE,
194
 
                                    stdout = subprocess.PIPE,
195
 
                                    stderr = subprocess.PIPE)
196
 
            ciphertext, err = proc.communicate(input = data)
197
 
        if proc.returncode != 0:
198
 
            raise PGPError(err)
199
 
        return ciphertext
200
 
    
201
 
    def decrypt(self, data, password):
202
 
        passphrase = self.password_encode(password)
203
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
204
 
                                         ) as passfile:
205
 
            passfile.write(passphrase)
206
 
            passfile.flush()
207
 
            proc = subprocess.Popen(['gpg', '--decrypt',
208
 
                                     '--passphrase-file',
209
 
                                     passfile.name]
210
 
                                    + self.gnupgargs,
211
 
                                    stdin = subprocess.PIPE,
212
 
                                    stdout = subprocess.PIPE,
213
 
                                    stderr = subprocess.PIPE)
214
 
            decrypted_plaintext, err = proc.communicate(input
215
 
                                                        = data)
216
 
        if proc.returncode != 0:
217
 
            raise PGPError(err)
218
 
        return decrypted_plaintext
219
 
 
220
 
 
221
 
class AvahiError(Exception):
222
 
    def __init__(self, value, *args, **kwargs):
223
 
        self.value = value
224
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
225
 
    def __unicode__(self):
226
 
        return unicode(repr(self.value))
227
 
 
228
 
class AvahiServiceError(AvahiError):
229
 
    pass
230
 
 
231
 
class AvahiGroupError(AvahiError):
232
 
    pass
233
 
 
234
 
 
235
 
class AvahiService(object):
236
 
    """An Avahi (Zeroconf) service.
237
 
    
238
 
    Attributes:
239
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
240
 
               Used to optionally bind to the specified interface.
241
 
    name: string; Example: 'Mandos'
242
 
    type: string; Example: '_mandos._tcp'.
243
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
244
 
    port: integer; what port to announce
245
 
    TXT: list of strings; TXT record for the service
246
 
    domain: string; Domain to publish on, default to .local if empty.
247
 
    host: string; Host to publish records for, default is localhost
248
 
    max_renames: integer; maximum number of renames
249
 
    rename_count: integer; counter so we only rename after collisions
250
 
                  a sensible number of times
251
 
    group: D-Bus Entry Group
252
 
    server: D-Bus Server
253
 
    bus: dbus.SystemBus()
254
 
    """
255
 
    
256
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
 
                 servicetype = None, port = None, TXT = None,
258
 
                 domain = "", host = "", max_renames = 32768,
259
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
260
 
        self.interface = interface
261
 
        self.name = name
262
 
        self.type = servicetype
263
 
        self.port = port
264
 
        self.TXT = TXT if TXT is not None else []
265
 
        self.domain = domain
266
 
        self.host = host
267
 
        self.rename_count = 0
268
 
        self.max_renames = max_renames
269
 
        self.protocol = protocol
270
 
        self.group = None       # our entry group
271
 
        self.server = None
272
 
        self.bus = bus
273
 
        self.entry_group_state_changed_match = None
274
 
    
275
 
    def rename(self):
276
 
        """Derived from the Avahi example code"""
277
 
        if self.rename_count >= self.max_renames:
278
 
            logger.critical("No suitable Zeroconf service name found"
279
 
                            " after %i retries, exiting.",
280
 
                            self.rename_count)
281
 
            raise AvahiServiceError("Too many renames")
282
 
        self.name = unicode(self.server
283
 
                            .GetAlternativeServiceName(self.name))
284
 
        logger.info("Changing Zeroconf service name to %r ...",
285
 
                    self.name)
286
 
        self.remove()
287
 
        try:
288
 
            self.add()
289
 
        except dbus.exceptions.DBusException as error:
290
 
            logger.critical("D-Bus Exception", exc_info=error)
291
 
            self.cleanup()
292
 
            os._exit(1)
293
 
        self.rename_count += 1
294
 
    
295
 
    def remove(self):
296
 
        """Derived from the Avahi example code"""
297
 
        if self.entry_group_state_changed_match is not None:
298
 
            self.entry_group_state_changed_match.remove()
299
 
            self.entry_group_state_changed_match = None
300
 
        if self.group is not None:
301
 
            self.group.Reset()
302
 
    
303
 
    def add(self):
304
 
        """Derived from the Avahi example code"""
305
 
        self.remove()
306
 
        if self.group is None:
307
 
            self.group = dbus.Interface(
308
 
                self.bus.get_object(avahi.DBUS_NAME,
309
 
                                    self.server.EntryGroupNew()),
310
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
 
        self.entry_group_state_changed_match = (
312
 
            self.group.connect_to_signal(
313
 
                'StateChanged', self.entry_group_state_changed))
314
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
 
                     self.name, self.type)
316
 
        self.group.AddService(
317
 
            self.interface,
318
 
            self.protocol,
319
 
            dbus.UInt32(0),     # flags
320
 
            self.name, self.type,
321
 
            self.domain, self.host,
322
 
            dbus.UInt16(self.port),
323
 
            avahi.string_array_to_txt_array(self.TXT))
324
 
        self.group.Commit()
325
 
    
326
 
    def entry_group_state_changed(self, state, error):
327
 
        """Derived from the Avahi example code"""
328
 
        logger.debug("Avahi entry group state change: %i", state)
329
 
        
330
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
331
 
            logger.debug("Zeroconf service established.")
332
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
333
 
            logger.info("Zeroconf service name collision.")
334
 
            self.rename()
335
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
336
 
            logger.critical("Avahi: Error in group state changed %s",
337
 
                            unicode(error))
338
 
            raise AvahiGroupError("State changed: {0!s}"
339
 
                                  .format(error))
340
 
    
341
 
    def cleanup(self):
342
 
        """Derived from the Avahi example code"""
343
 
        if self.group is not None:
344
 
            try:
345
 
                self.group.Free()
346
 
            except (dbus.exceptions.UnknownMethodException,
347
 
                    dbus.exceptions.DBusException):
348
 
                pass
349
 
            self.group = None
350
 
        self.remove()
351
 
    
352
 
    def server_state_changed(self, state, error=None):
353
 
        """Derived from the Avahi example code"""
354
 
        logger.debug("Avahi server state change: %i", state)
355
 
        bad_states = { avahi.SERVER_INVALID:
356
 
                           "Zeroconf server invalid",
357
 
                       avahi.SERVER_REGISTERING: None,
358
 
                       avahi.SERVER_COLLISION:
359
 
                           "Zeroconf server name collision",
360
 
                       avahi.SERVER_FAILURE:
361
 
                           "Zeroconf server failure" }
362
 
        if state in bad_states:
363
 
            if bad_states[state] is not None:
364
 
                if error is None:
365
 
                    logger.error(bad_states[state])
366
 
                else:
367
 
                    logger.error(bad_states[state] + ": %r", error)
368
 
            self.cleanup()
369
 
        elif state == avahi.SERVER_RUNNING:
370
 
            self.add()
371
 
        else:
372
 
            if error is None:
373
 
                logger.debug("Unknown state: %r", state)
374
 
            else:
375
 
                logger.debug("Unknown state: %r: %r", state, error)
376
 
    
377
 
    def activate(self):
378
 
        """Derived from the Avahi example code"""
379
 
        if self.server is None:
380
 
            self.server = dbus.Interface(
381
 
                self.bus.get_object(avahi.DBUS_NAME,
382
 
                                    avahi.DBUS_PATH_SERVER,
383
 
                                    follow_name_owner_changes=True),
384
 
                avahi.DBUS_INTERFACE_SERVER)
385
 
        self.server.connect_to_signal("StateChanged",
386
 
                                 self.server_state_changed)
387
 
        self.server_state_changed(self.server.GetState())
388
 
 
389
 
 
390
 
class AvahiServiceToSyslog(AvahiService):
391
 
    def rename(self):
392
 
        """Add the new name to the syslog messages"""
393
 
        ret = AvahiService.rename(self)
394
 
        syslogger.setFormatter(logging.Formatter
395
 
                               ('Mandos ({0}) [%(process)d]:'
396
 
                                ' %(levelname)s: %(message)s'
397
 
                                .format(self.name)))
398
 
        return ret
399
 
 
400
 
 
401
 
def timedelta_to_milliseconds(td):
402
 
    "Convert a datetime.timedelta() to milliseconds"
403
 
    return ((td.days * 24 * 60 * 60 * 1000)
404
 
            + (td.seconds * 1000)
405
 
            + (td.microseconds // 1000))
 
30
 
 
31
import logging
 
32
import logging.handlers
 
33
 
 
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
 
35
 
 
36
logger = logging.Logger('mandos')
 
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
 
38
 
 
39
# This variable is used to optionally bind to a specified interface.
 
40
# It is a global variable to fit in with the other variables from the
 
41
# Avahi server example code.
 
42
serviceInterface = avahi.IF_UNSPEC
 
43
# From the Avahi server example code:
 
44
serviceName = "Mandos"
 
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
46
servicePort = None                      # Not known at startup
 
47
serviceTXT = []                         # TXT record for the service
 
48
domain = ""                  # Domain to publish on, default to .local
 
49
host = ""          # Host to publish records for, default to localhost
 
50
group = None #our entry group
 
51
rename_count = 12       # Counter so we only rename after collisions a
 
52
                        # sensible number of times
 
53
# End of Avahi example code
406
54
 
407
55
 
408
56
class Client(object):
409
57
    """A representation of a client host served by this server.
410
 
    
411
58
    Attributes:
412
 
    approved:   bool(); 'None' if not yet approved/disapproved
413
 
    approval_delay: datetime.timedelta(); Time to wait for approval
414
 
    approval_duration: datetime.timedelta(); Duration of one approval
415
 
    checker:    subprocess.Popen(); a running checker process used
416
 
                                    to see if the client lives.
417
 
                                    'None' if no process is running.
418
 
    checker_callback_tag: a gobject event source tag, or None
419
 
    checker_command: string; External command which is run to check
420
 
                     if client lives.  %() expansions are done at
 
59
    name:      string; from the config file, used in log messages
 
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
61
                 uniquely identify the client
 
62
    secret:    bytestring; sent verbatim (over TLS) to client
 
63
    fqdn:      string (FQDN); available for use by the checker command
 
64
    created:   datetime.datetime()
 
65
    last_seen: datetime.datetime() or None if not yet seen
 
66
    timeout:   datetime.timedelta(); How long from last_seen until
 
67
                                     this client is invalid
 
68
    interval:  datetime.timedelta(); How often to start a new checker
 
69
    stop_hook: If set, called by stop() as stop_hook(self)
 
70
    checker:   subprocess.Popen(); a running checker process used
 
71
                                   to see if the client lives.
 
72
                                   Is None if no process is running.
 
73
    checker_initiator_tag: a gobject event source tag, or None
 
74
    stop_initiator_tag:    - '' -
 
75
    checker_callback_tag:  - '' -
 
76
    checker_command: string; External command which is run to check if
 
77
                     client lives.  %()s expansions are done at
421
78
                     runtime with vars(self) as dict, so that for
422
79
                     instance %(name)s can be used in the command.
423
 
    checker_initiator_tag: a gobject event source tag, or None
424
 
    created:    datetime.datetime(); (UTC) object creation
425
 
    client_structure: Object describing what attributes a client has
426
 
                      and is used for storing the client at exit
427
 
    current_checker_command: string; current running checker_command
428
 
    disable_initiator_tag: a gobject event source tag, or None
429
 
    enabled:    bool()
430
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
431
 
                 uniquely identify the client
432
 
    host:       string; available for use by the checker command
433
 
    interval:   datetime.timedelta(); How often to start a new checker
434
 
    last_approval_request: datetime.datetime(); (UTC) or None
435
 
    last_checked_ok: datetime.datetime(); (UTC) or None
436
 
    last_checker_status: integer between 0 and 255 reflecting exit
437
 
                         status of last checker. -1 reflects crashed
438
 
                         checker, -2 means no checker completed yet.
439
 
    last_enabled: datetime.datetime(); (UTC) or None
440
 
    name:       string; from the config file, used in log messages and
441
 
                        D-Bus identifiers
442
 
    secret:     bytestring; sent verbatim (over TLS) to client
443
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
444
 
                                      until this client is disabled
445
 
    extended_timeout:   extra long timeout when secret has been sent
446
 
    runtime_expansions: Allowed attributes for runtime expansion.
447
 
    expires:    datetime.datetime(); time (UTC) when a client will be
448
 
                disabled, or None
449
 
    server_settings: The server_settings dict from main()
 
80
    Private attibutes:
 
81
    _timeout: Real variable for 'timeout'
 
82
    _interval: Real variable for 'interval'
 
83
    _timeout_milliseconds: Used by gobject.timeout_add()
 
84
    _interval_milliseconds: - '' -
450
85
    """
451
 
    
452
 
    runtime_expansions = ("approval_delay", "approval_duration",
453
 
                          "created", "enabled", "expires",
454
 
                          "fingerprint", "host", "interval",
455
 
                          "last_approval_request", "last_checked_ok",
456
 
                          "last_enabled", "name", "timeout")
457
 
    client_defaults = { "timeout": "PT5M",
458
 
                        "extended_timeout": "PT15M",
459
 
                        "interval": "PT2M",
460
 
                        "checker": "fping -q -- %%(host)s",
461
 
                        "host": "",
462
 
                        "approval_delay": "PT0S",
463
 
                        "approval_duration": "PT1S",
464
 
                        "approved_by_default": "True",
465
 
                        "enabled": "True",
466
 
                        }
467
 
    
468
 
    def timeout_milliseconds(self):
469
 
        "Return the 'timeout' attribute in milliseconds"
470
 
        return timedelta_to_milliseconds(self.timeout)
471
 
    
472
 
    def extended_timeout_milliseconds(self):
473
 
        "Return the 'extended_timeout' attribute in milliseconds"
474
 
        return timedelta_to_milliseconds(self.extended_timeout)
475
 
    
476
 
    def interval_milliseconds(self):
477
 
        "Return the 'interval' attribute in milliseconds"
478
 
        return timedelta_to_milliseconds(self.interval)
479
 
    
480
 
    def approval_delay_milliseconds(self):
481
 
        return timedelta_to_milliseconds(self.approval_delay)
482
 
    
483
 
    @staticmethod
484
 
    def config_parser(config):
485
 
        """Construct a new dict of client settings of this form:
486
 
        { client_name: {setting_name: value, ...}, ...}
487
 
        with exceptions for any special settings as defined above.
488
 
        NOTE: Must be a pure function. Must return the same result
489
 
        value given the same arguments.
490
 
        """
491
 
        settings = {}
492
 
        for client_name in config.sections():
493
 
            section = dict(config.items(client_name))
494
 
            client = settings[client_name] = {}
495
 
            
496
 
            client["host"] = section["host"]
497
 
            # Reformat values from string types to Python types
498
 
            client["approved_by_default"] = config.getboolean(
499
 
                client_name, "approved_by_default")
500
 
            client["enabled"] = config.getboolean(client_name,
501
 
                                                  "enabled")
502
 
            
503
 
            client["fingerprint"] = (section["fingerprint"].upper()
504
 
                                     .replace(" ", ""))
505
 
            if "secret" in section:
506
 
                client["secret"] = section["secret"].decode("base64")
507
 
            elif "secfile" in section:
508
 
                with open(os.path.expanduser(os.path.expandvars
509
 
                                             (section["secfile"])),
510
 
                          "rb") as secfile:
511
 
                    client["secret"] = secfile.read()
512
 
            else:
513
 
                raise TypeError("No secret or secfile for section {0}"
514
 
                                .format(section))
515
 
            client["timeout"] = string_to_delta(section["timeout"])
516
 
            client["extended_timeout"] = string_to_delta(
517
 
                section["extended_timeout"])
518
 
            client["interval"] = string_to_delta(section["interval"])
519
 
            client["approval_delay"] = string_to_delta(
520
 
                section["approval_delay"])
521
 
            client["approval_duration"] = string_to_delta(
522
 
                section["approval_duration"])
523
 
            client["checker_command"] = section["checker"]
524
 
            client["last_approval_request"] = None
525
 
            client["last_checked_ok"] = None
526
 
            client["last_checker_status"] = -2
527
 
        
528
 
        return settings
529
 
    
530
 
    def __init__(self, settings, name = None, server_settings=None):
 
86
    def _set_timeout(self, timeout):
 
87
        "Setter function for 'timeout' attribute"
 
88
        self._timeout = timeout
 
89
        self._timeout_milliseconds = ((self.timeout.days
 
90
                                       * 24 * 60 * 60 * 1000)
 
91
                                      + (self.timeout.seconds * 1000)
 
92
                                      + (self.timeout.microseconds
 
93
                                         // 1000))
 
94
    timeout = property(lambda self: self._timeout,
 
95
                       _set_timeout)
 
96
    del _set_timeout
 
97
    def _set_interval(self, interval):
 
98
        "Setter function for 'interval' attribute"
 
99
        self._interval = interval
 
100
        self._interval_milliseconds = ((self.interval.days
 
101
                                        * 24 * 60 * 60 * 1000)
 
102
                                       + (self.interval.seconds
 
103
                                          * 1000)
 
104
                                       + (self.interval.microseconds
 
105
                                          // 1000))
 
106
    interval = property(lambda self: self._interval,
 
107
                        _set_interval)
 
108
    del _set_interval
 
109
    def __init__(self, name=None, options=None, stop_hook=None,
 
110
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
111
                 timeout=None, interval=-1, checker=None):
531
112
        self.name = name
532
 
        if server_settings is None:
533
 
            server_settings = {}
534
 
        self.server_settings = server_settings
535
 
        # adding all client settings
536
 
        for setting, value in settings.iteritems():
537
 
            setattr(self, setting, value)
538
 
        
539
 
        if self.enabled:
540
 
            if not hasattr(self, "last_enabled"):
541
 
                self.last_enabled = datetime.datetime.utcnow()
542
 
            if not hasattr(self, "expires"):
543
 
                self.expires = (datetime.datetime.utcnow()
544
 
                                + self.timeout)
545
 
        else:
546
 
            self.last_enabled = None
547
 
            self.expires = None
548
 
        
549
 
        logger.debug("Creating client %r", self.name)
550
 
        # Uppercase and remove spaces from fingerprint for later
551
 
        # comparison purposes with return value from the fingerprint()
552
 
        # function
553
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
554
 
        self.created = settings.get("created",
555
 
                                    datetime.datetime.utcnow())
556
 
        
557
 
        # attributes specific for this server instance
 
113
        # Uppercase and remove spaces from fingerprint
 
114
        # for later comparison purposes with return value of
 
115
        # the fingerprint() function
 
116
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
117
        if secret:
 
118
            self.secret = secret.decode(u"base64")
 
119
        elif secfile:
 
120
            sf = open(secfile)
 
121
            self.secret = sf.read()
 
122
            sf.close()
 
123
        else:
 
124
            raise RuntimeError(u"No secret or secfile for client %s"
 
125
                               % self.name)
 
126
        self.fqdn = fqdn                # string
 
127
        self.created = datetime.datetime.now()
 
128
        self.last_seen = None
 
129
        if timeout is None:
 
130
            timeout = options.timeout
 
131
        self.timeout = timeout
 
132
        if interval == -1:
 
133
            interval = options.interval
 
134
        else:
 
135
            interval = string_to_delta(interval)
 
136
        self.interval = interval
 
137
        self.stop_hook = stop_hook
558
138
        self.checker = None
559
139
        self.checker_initiator_tag = None
560
 
        self.disable_initiator_tag = None
 
140
        self.stop_initiator_tag = None
561
141
        self.checker_callback_tag = None
562
 
        self.current_checker_command = None
563
 
        self.approved = None
564
 
        self.approvals_pending = 0
565
 
        self.changedstate = (multiprocessing_manager
566
 
                             .Condition(multiprocessing_manager
567
 
                                        .Lock()))
568
 
        self.client_structure = [attr for attr in
569
 
                                 self.__dict__.iterkeys()
570
 
                                 if not attr.startswith("_")]
571
 
        self.client_structure.append("client_structure")
572
 
        
573
 
        for name, t in inspect.getmembers(type(self),
574
 
                                          lambda obj:
575
 
                                              isinstance(obj,
576
 
                                                         property)):
577
 
            if not name.startswith("_"):
578
 
                self.client_structure.append(name)
579
 
    
580
 
    # Send notice to process children that client state has changed
581
 
    def send_changedstate(self):
582
 
        with self.changedstate:
583
 
            self.changedstate.notify_all()
584
 
    
585
 
    def enable(self):
586
 
        """Start this client's checker and timeout hooks"""
587
 
        if getattr(self, "enabled", False):
588
 
            # Already enabled
589
 
            return
590
 
        self.expires = datetime.datetime.utcnow() + self.timeout
591
 
        self.enabled = True
592
 
        self.last_enabled = datetime.datetime.utcnow()
593
 
        self.init_checker()
594
 
        self.send_changedstate()
595
 
    
596
 
    def disable(self, quiet=True):
597
 
        """Disable this client."""
598
 
        if not getattr(self, "enabled", False):
599
 
            return False
600
 
        if not quiet:
601
 
            logger.info("Disabling client %s", self.name)
602
 
        if getattr(self, "disable_initiator_tag", None) is not None:
603
 
            gobject.source_remove(self.disable_initiator_tag)
604
 
            self.disable_initiator_tag = None
605
 
        self.expires = None
606
 
        if getattr(self, "checker_initiator_tag", None) is not None:
607
 
            gobject.source_remove(self.checker_initiator_tag)
608
 
            self.checker_initiator_tag = None
609
 
        self.stop_checker()
610
 
        self.enabled = False
611
 
        if not quiet:
612
 
            self.send_changedstate()
613
 
        # Do not run this again if called by a gobject.timeout_add
614
 
        return False
615
 
    
616
 
    def __del__(self):
617
 
        self.disable()
618
 
    
619
 
    def init_checker(self):
 
142
        self.check_command = checker
 
143
    def start(self):
 
144
        """Start this clients checker and timeout hooks"""
620
145
        # Schedule a new checker to be started an 'interval' from now,
621
146
        # and every interval from then on.
622
 
        if self.checker_initiator_tag is not None:
623
 
            gobject.source_remove(self.checker_initiator_tag)
624
 
        self.checker_initiator_tag = (gobject.timeout_add
625
 
                                      (self.interval_milliseconds(),
626
 
                                       self.start_checker))
627
 
        # Schedule a disable() when 'timeout' has passed
628
 
        if self.disable_initiator_tag is not None:
629
 
            gobject.source_remove(self.disable_initiator_tag)
630
 
        self.disable_initiator_tag = (gobject.timeout_add
631
 
                                   (self.timeout_milliseconds(),
632
 
                                    self.disable))
 
147
        self.checker_initiator_tag = gobject.timeout_add\
 
148
                                     (self._interval_milliseconds,
 
149
                                      self.start_checker)
633
150
        # Also start a new checker *right now*.
634
151
        self.start_checker()
635
 
    
636
 
    def checker_callback(self, pid, condition, command):
 
152
        # Schedule a stop() when 'timeout' has passed
 
153
        self.stop_initiator_tag = gobject.timeout_add\
 
154
                                  (self._timeout_milliseconds,
 
155
                                   self.stop)
 
156
    def stop(self):
 
157
        """Stop this client.
 
158
        The possibility that this client might be restarted is left
 
159
        open, but not currently used."""
 
160
        logger.debug(u"Stopping client %s", self.name)
 
161
        self.secret = None
 
162
        if self.stop_initiator_tag:
 
163
            gobject.source_remove(self.stop_initiator_tag)
 
164
            self.stop_initiator_tag = None
 
165
        if self.checker_initiator_tag:
 
166
            gobject.source_remove(self.checker_initiator_tag)
 
167
            self.checker_initiator_tag = None
 
168
        self.stop_checker()
 
169
        if self.stop_hook:
 
170
            self.stop_hook(self)
 
171
        # Do not run this again if called by a gobject.timeout_add
 
172
        return False
 
173
    def __del__(self):
 
174
        # Some code duplication here and in stop()
 
175
        if hasattr(self, "stop_initiator_tag") \
 
176
               and self.stop_initiator_tag:
 
177
            gobject.source_remove(self.stop_initiator_tag)
 
178
            self.stop_initiator_tag = None
 
179
        if hasattr(self, "checker_initiator_tag") \
 
180
               and self.checker_initiator_tag:
 
181
            gobject.source_remove(self.checker_initiator_tag)
 
182
            self.checker_initiator_tag = None
 
183
        self.stop_checker()
 
184
    def checker_callback(self, pid, condition):
637
185
        """The checker has completed, so take appropriate actions."""
638
 
        self.checker_callback_tag = None
639
 
        self.checker = None
640
 
        if os.WIFEXITED(condition):
641
 
            self.last_checker_status = os.WEXITSTATUS(condition)
642
 
            if self.last_checker_status == 0:
643
 
                logger.info("Checker for %(name)s succeeded",
644
 
                            vars(self))
645
 
                self.checked_ok()
646
 
            else:
647
 
                logger.info("Checker for %(name)s failed",
648
 
                            vars(self))
649
 
        else:
650
 
            self.last_checker_status = -1
651
 
            logger.warning("Checker for %(name)s crashed?",
 
186
        now = datetime.datetime.now()
 
187
        if os.WIFEXITED(condition) \
 
188
               and (os.WEXITSTATUS(condition) == 0):
 
189
            logger.debug(u"Checker for %(name)s succeeded",
 
190
                         vars(self))
 
191
            self.last_seen = now
 
192
            gobject.source_remove(self.stop_initiator_tag)
 
193
            self.stop_initiator_tag = gobject.timeout_add\
 
194
                                      (self._timeout_milliseconds,
 
195
                                       self.stop)
 
196
        if not os.WIFEXITED(condition):
 
197
            logger.warning(u"Checker for %(name)s crashed?",
652
198
                           vars(self))
653
 
    
654
 
    def checked_ok(self):
655
 
        """Assert that the client has been seen, alive and well."""
656
 
        self.last_checked_ok = datetime.datetime.utcnow()
657
 
        self.last_checker_status = 0
658
 
        self.bump_timeout()
659
 
    
660
 
    def bump_timeout(self, timeout=None):
661
 
        """Bump up the timeout for this client."""
662
 
        if timeout is None:
663
 
            timeout = self.timeout
664
 
        if self.disable_initiator_tag is not None:
665
 
            gobject.source_remove(self.disable_initiator_tag)
666
 
            self.disable_initiator_tag = None
667
 
        if getattr(self, "enabled", False):
668
 
            self.disable_initiator_tag = (gobject.timeout_add
669
 
                                          (timedelta_to_milliseconds
670
 
                                           (timeout), self.disable))
671
 
            self.expires = datetime.datetime.utcnow() + timeout
672
 
    
673
 
    def need_approval(self):
674
 
        self.last_approval_request = datetime.datetime.utcnow()
675
 
    
 
199
        else:
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
676
204
    def start_checker(self):
677
205
        """Start a new checker subprocess if one is not running.
678
 
        
679
206
        If a checker already exists, leave it running and do
680
207
        nothing."""
681
 
        # The reason for not killing a running checker is that if we
682
 
        # did that, and if a checker (for some reason) started running
683
 
        # slowly and taking more than 'interval' time, then the client
684
 
        # would inevitably timeout, since no checker would get a
685
 
        # chance to run to completion.  If we instead leave running
686
 
        # checkers alone, the checker would have to take more time
687
 
        # than 'timeout' for the client to be disabled, which is as it
688
 
        # should be.
689
 
        
690
 
        # If a checker exists, make sure it is not a zombie
691
 
        try:
692
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
 
        except (AttributeError, OSError) as error:
694
 
            if (isinstance(error, OSError)
695
 
                and error.errno != errno.ECHILD):
696
 
                raise error
697
 
        else:
698
 
            if pid:
699
 
                logger.warning("Checker was a zombie")
700
 
                gobject.source_remove(self.checker_callback_tag)
701
 
                self.checker_callback(pid, status,
702
 
                                      self.current_checker_command)
703
 
        # Start a new checker if needed
704
208
        if self.checker is None:
705
 
            # Escape attributes for the shell
706
 
            escaped_attrs = dict(
707
 
                (attr, re.escape(unicode(getattr(self, attr))))
708
 
                for attr in
709
 
                self.runtime_expansions)
710
 
            try:
711
 
                command = self.checker_command % escaped_attrs
712
 
            except TypeError as error:
713
 
                logger.error('Could not format string "%s"',
714
 
                             self.checker_command, exc_info=error)
715
 
                return True # Try again later
716
 
            self.current_checker_command = command
717
 
            try:
718
 
                logger.info("Starting checker %r for %s",
719
 
                            command, self.name)
720
 
                # We don't need to redirect stdout and stderr, since
721
 
                # in normal mode, that is already done by daemon(),
722
 
                # and in debug mode we don't want to.  (Stdin is
723
 
                # always replaced by /dev/null.)
724
 
                # The exception is when not debugging but nevertheless
725
 
                # running in the foreground; use the previously
726
 
                # created wnull.
727
 
                popen_args = {}
728
 
                if (not self.server_settings["debug"]
729
 
                    and self.server_settings["foreground"]):
730
 
                    popen_args.update({"stdout": wnull,
731
 
                                       "stderr": wnull })
732
 
                self.checker = subprocess.Popen(command,
733
 
                                                close_fds=True,
734
 
                                                shell=True, cwd="/",
735
 
                                                **popen_args)
736
 
            except OSError as error:
737
 
                logger.error("Failed to start subprocess",
738
 
                             exc_info=error)
739
 
                return True
740
 
            self.checker_callback_tag = (gobject.child_watch_add
741
 
                                         (self.checker.pid,
742
 
                                          self.checker_callback,
743
 
                                          data=command))
744
 
            # The checker may have completed before the gobject
745
 
            # watch was added.  Check for this.
746
 
            try:
747
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
 
            except OSError as error:
749
 
                if error.errno == errno.ECHILD:
750
 
                    # This should never happen
751
 
                    logger.error("Child process vanished",
752
 
                                 exc_info=error)
753
 
                    return True
754
 
                raise
755
 
            if pid:
756
 
                gobject.source_remove(self.checker_callback_tag)
757
 
                self.checker_callback(pid, status, command)
 
209
            logger.debug(u"Starting checker for %s",
 
210
                         self.name)
 
211
            try:
 
212
                command = self.check_command % self.fqdn
 
213
            except TypeError:
 
214
                escaped_attrs = dict((key, re.escape(str(val)))
 
215
                                     for key, val in
 
216
                                     vars(self).iteritems())
 
217
                try:
 
218
                    command = self.check_command % escaped_attrs
 
219
                except TypeError, error:
 
220
                    logger.critical(u'Could not format string "%s": %s',
 
221
                                    self.check_command, error)
 
222
                    return True # Try again later
 
223
            try:
 
224
                self.checker = subprocess.\
 
225
                               Popen(command,
 
226
                                     stdout=subprocess.PIPE,
 
227
                                     close_fds=True, shell=True,
 
228
                                     cwd="/")
 
229
                self.checker_callback_tag = gobject.\
 
230
                                            child_watch_add(self.checker.pid,
 
231
                                                            self.\
 
232
                                                            checker_callback)
 
233
            except subprocess.OSError, error:
 
234
                logger.error(u"Failed to start subprocess: %s",
 
235
                             error)
758
236
        # Re-run this periodically if run by gobject.timeout_add
759
237
        return True
760
 
    
761
238
    def stop_checker(self):
762
239
        """Force the checker process, if any, to stop."""
763
 
        if self.checker_callback_tag:
764
 
            gobject.source_remove(self.checker_callback_tag)
765
 
            self.checker_callback_tag = None
766
 
        if getattr(self, "checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
767
241
            return
768
 
        logger.debug("Stopping checker for %(name)s", vars(self))
769
 
        try:
770
 
            self.checker.terminate()
771
 
            #time.sleep(0.5)
772
 
            #if self.checker.poll() is None:
773
 
            #    self.checker.kill()
774
 
        except OSError as error:
775
 
            if error.errno != errno.ESRCH: # No such process
776
 
                raise
777
 
        self.checker = None
778
 
 
779
 
 
780
 
def dbus_service_property(dbus_interface, signature="v",
781
 
                          access="readwrite", byte_arrays=False):
782
 
    """Decorators for marking methods of a DBusObjectWithProperties to
783
 
    become properties on the D-Bus.
784
 
    
785
 
    The decorated method will be called with no arguments by "Get"
786
 
    and with one argument by "Set".
787
 
    
788
 
    The parameters, where they are supported, are the same as
789
 
    dbus.service.method, except there is only "signature", since the
790
 
    type from Get() and the type sent to Set() is the same.
791
 
    """
792
 
    # Encoding deeply encoded byte arrays is not supported yet by the
793
 
    # "Set" method, so we fail early here:
794
 
    if byte_arrays and signature != "ay":
795
 
        raise ValueError("Byte arrays not supported for non-'ay'"
796
 
                         " signature {0!r}".format(signature))
797
 
    def decorator(func):
798
 
        func._dbus_is_property = True
799
 
        func._dbus_interface = dbus_interface
800
 
        func._dbus_signature = signature
801
 
        func._dbus_access = access
802
 
        func._dbus_name = func.__name__
803
 
        if func._dbus_name.endswith("_dbus_property"):
804
 
            func._dbus_name = func._dbus_name[:-14]
805
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
806
 
        return func
807
 
    return decorator
808
 
 
809
 
 
810
 
def dbus_interface_annotations(dbus_interface):
811
 
    """Decorator for marking functions returning interface annotations
812
 
    
813
 
    Usage:
814
 
    
815
 
    @dbus_interface_annotations("org.example.Interface")
816
 
    def _foo(self):  # Function name does not matter
817
 
        return {"org.freedesktop.DBus.Deprecated": "true",
818
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
819
 
                    "false"}
820
 
    """
821
 
    def decorator(func):
822
 
        func._dbus_is_interface = True
823
 
        func._dbus_interface = dbus_interface
824
 
        func._dbus_name = dbus_interface
825
 
        return func
826
 
    return decorator
827
 
 
828
 
 
829
 
def dbus_annotations(annotations):
830
 
    """Decorator to annotate D-Bus methods, signals or properties
831
 
    Usage:
832
 
    
833
 
    @dbus_service_property("org.example.Interface", signature="b",
834
 
                           access="r")
835
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
836
 
                        "org.freedesktop.DBus.Property."
837
 
                        "EmitsChangedSignal": "false"})
838
 
    def Property_dbus_property(self):
839
 
        return dbus.Boolean(False)
840
 
    """
841
 
    def decorator(func):
842
 
        func._dbus_annotations = annotations
843
 
        return func
844
 
    return decorator
845
 
 
846
 
 
847
 
class DBusPropertyException(dbus.exceptions.DBusException):
848
 
    """A base class for D-Bus property-related exceptions
849
 
    """
850
 
    def __unicode__(self):
851
 
        return unicode(str(self))
852
 
 
853
 
 
854
 
class DBusPropertyAccessException(DBusPropertyException):
855
 
    """A property's access permissions disallows an operation.
856
 
    """
857
 
    pass
858
 
 
859
 
 
860
 
class DBusPropertyNotFound(DBusPropertyException):
861
 
    """An attempt was made to access a non-existing property.
862
 
    """
863
 
    pass
864
 
 
865
 
 
866
 
class DBusObjectWithProperties(dbus.service.Object):
867
 
    """A D-Bus object with properties.
868
 
    
869
 
    Classes inheriting from this can use the dbus_service_property
870
 
    decorator to expose methods as D-Bus properties.  It exposes the
871
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
872
 
    """
873
 
    
874
 
    @staticmethod
875
 
    def _is_dbus_thing(thing):
876
 
        """Returns a function testing if an attribute is a D-Bus thing
877
 
        
878
 
        If called like _is_dbus_thing("method") it returns a function
879
 
        suitable for use as predicate to inspect.getmembers().
880
 
        """
881
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
882
 
                                   False)
883
 
    
884
 
    def _get_all_dbus_things(self, thing):
885
 
        """Returns a generator of (name, attribute) pairs
886
 
        """
887
 
        return ((getattr(athing.__get__(self), "_dbus_name",
888
 
                         name),
889
 
                 athing.__get__(self))
890
 
                for cls in self.__class__.__mro__
891
 
                for name, athing in
892
 
                inspect.getmembers(cls,
893
 
                                   self._is_dbus_thing(thing)))
894
 
    
895
 
    def _get_dbus_property(self, interface_name, property_name):
896
 
        """Returns a bound method if one exists which is a D-Bus
897
 
        property with the specified name and interface.
898
 
        """
899
 
        for cls in  self.__class__.__mro__:
900
 
            for name, value in (inspect.getmembers
901
 
                                (cls,
902
 
                                 self._is_dbus_thing("property"))):
903
 
                if (value._dbus_name == property_name
904
 
                    and value._dbus_interface == interface_name):
905
 
                    return value.__get__(self)
906
 
        
907
 
        # No such property
908
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
909
 
                                   + interface_name + "."
910
 
                                   + property_name)
911
 
    
912
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
913
 
                         out_signature="v")
914
 
    def Get(self, interface_name, property_name):
915
 
        """Standard D-Bus property Get() method, see D-Bus standard.
916
 
        """
917
 
        prop = self._get_dbus_property(interface_name, property_name)
918
 
        if prop._dbus_access == "write":
919
 
            raise DBusPropertyAccessException(property_name)
920
 
        value = prop()
921
 
        if not hasattr(value, "variant_level"):
922
 
            return value
923
 
        return type(value)(value, variant_level=value.variant_level+1)
924
 
    
925
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
926
 
    def Set(self, interface_name, property_name, value):
927
 
        """Standard D-Bus property Set() method, see D-Bus standard.
928
 
        """
929
 
        prop = self._get_dbus_property(interface_name, property_name)
930
 
        if prop._dbus_access == "read":
931
 
            raise DBusPropertyAccessException(property_name)
932
 
        if prop._dbus_get_args_options["byte_arrays"]:
933
 
            # The byte_arrays option is not supported yet on
934
 
            # signatures other than "ay".
935
 
            if prop._dbus_signature != "ay":
936
 
                raise ValueError
937
 
            value = dbus.ByteArray(b''.join(chr(byte)
938
 
                                            for byte in value))
939
 
        prop(value)
940
 
    
941
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
942
 
                         out_signature="a{sv}")
943
 
    def GetAll(self, interface_name):
944
 
        """Standard D-Bus property GetAll() method, see D-Bus
945
 
        standard.
946
 
        
947
 
        Note: Will not include properties with access="write".
948
 
        """
949
 
        properties = {}
950
 
        for name, prop in self._get_all_dbus_things("property"):
951
 
            if (interface_name
952
 
                and interface_name != prop._dbus_interface):
953
 
                # Interface non-empty but did not match
954
 
                continue
955
 
            # Ignore write-only properties
956
 
            if prop._dbus_access == "write":
957
 
                continue
958
 
            value = prop()
959
 
            if not hasattr(value, "variant_level"):
960
 
                properties[name] = value
961
 
                continue
962
 
            properties[name] = type(value)(value, variant_level=
963
 
                                           value.variant_level+1)
964
 
        return dbus.Dictionary(properties, signature="sv")
965
 
    
966
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
967
 
                         out_signature="s",
968
 
                         path_keyword='object_path',
969
 
                         connection_keyword='connection')
970
 
    def Introspect(self, object_path, connection):
971
 
        """Overloading of standard D-Bus method.
972
 
        
973
 
        Inserts property tags and interface annotation tags.
974
 
        """
975
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
976
 
                                                   connection)
977
 
        try:
978
 
            document = xml.dom.minidom.parseString(xmlstring)
979
 
            def make_tag(document, name, prop):
980
 
                e = document.createElement("property")
981
 
                e.setAttribute("name", name)
982
 
                e.setAttribute("type", prop._dbus_signature)
983
 
                e.setAttribute("access", prop._dbus_access)
984
 
                return e
985
 
            for if_tag in document.getElementsByTagName("interface"):
986
 
                # Add property tags
987
 
                for tag in (make_tag(document, name, prop)
988
 
                            for name, prop
989
 
                            in self._get_all_dbus_things("property")
990
 
                            if prop._dbus_interface
991
 
                            == if_tag.getAttribute("name")):
992
 
                    if_tag.appendChild(tag)
993
 
                # Add annotation tags
994
 
                for typ in ("method", "signal", "property"):
995
 
                    for tag in if_tag.getElementsByTagName(typ):
996
 
                        annots = dict()
997
 
                        for name, prop in (self.
998
 
                                           _get_all_dbus_things(typ)):
999
 
                            if (name == tag.getAttribute("name")
1000
 
                                and prop._dbus_interface
1001
 
                                == if_tag.getAttribute("name")):
1002
 
                                annots.update(getattr
1003
 
                                              (prop,
1004
 
                                               "_dbus_annotations",
1005
 
                                               {}))
1006
 
                        for name, value in annots.iteritems():
1007
 
                            ann_tag = document.createElement(
1008
 
                                "annotation")
1009
 
                            ann_tag.setAttribute("name", name)
1010
 
                            ann_tag.setAttribute("value", value)
1011
 
                            tag.appendChild(ann_tag)
1012
 
                # Add interface annotation tags
1013
 
                for annotation, value in dict(
1014
 
                    itertools.chain.from_iterable(
1015
 
                        annotations().iteritems()
1016
 
                        for name, annotations in
1017
 
                        self._get_all_dbus_things("interface")
1018
 
                        if name == if_tag.getAttribute("name")
1019
 
                        )).iteritems():
1020
 
                    ann_tag = document.createElement("annotation")
1021
 
                    ann_tag.setAttribute("name", annotation)
1022
 
                    ann_tag.setAttribute("value", value)
1023
 
                    if_tag.appendChild(ann_tag)
1024
 
                # Add the names to the return values for the
1025
 
                # "org.freedesktop.DBus.Properties" methods
1026
 
                if (if_tag.getAttribute("name")
1027
 
                    == "org.freedesktop.DBus.Properties"):
1028
 
                    for cn in if_tag.getElementsByTagName("method"):
1029
 
                        if cn.getAttribute("name") == "Get":
1030
 
                            for arg in cn.getElementsByTagName("arg"):
1031
 
                                if (arg.getAttribute("direction")
1032
 
                                    == "out"):
1033
 
                                    arg.setAttribute("name", "value")
1034
 
                        elif cn.getAttribute("name") == "GetAll":
1035
 
                            for arg in cn.getElementsByTagName("arg"):
1036
 
                                if (arg.getAttribute("direction")
1037
 
                                    == "out"):
1038
 
                                    arg.setAttribute("name", "props")
1039
 
            xmlstring = document.toxml("utf-8")
1040
 
            document.unlink()
1041
 
        except (AttributeError, xml.dom.DOMException,
1042
 
                xml.parsers.expat.ExpatError) as error:
1043
 
            logger.error("Failed to override Introspection method",
1044
 
                         exc_info=error)
1045
 
        return xmlstring
1046
 
 
1047
 
 
1048
 
def datetime_to_dbus(dt, variant_level=0):
1049
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1050
 
    if dt is None:
1051
 
        return dbus.String("", variant_level = variant_level)
1052
 
    return dbus.String(dt.isoformat(),
1053
 
                       variant_level=variant_level)
1054
 
 
1055
 
 
1056
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
 
    """A class decorator; applied to a subclass of
1058
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1059
 
    interface names according to the "alt_interface_names" mapping.
1060
 
    Usage:
1061
 
    
1062
 
    @alternate_dbus_interfaces({"org.example.Interface":
1063
 
                                    "net.example.AlternateInterface"})
1064
 
    class SampleDBusObject(dbus.service.Object):
1065
 
        @dbus.service.method("org.example.Interface")
1066
 
        def SampleDBusMethod():
1067
 
            pass
1068
 
    
1069
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1070
 
    reachable via two interfaces: "org.example.Interface" and
1071
 
    "net.example.AlternateInterface", the latter of which will have
1072
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1073
 
    "true", unless "deprecate" is passed with a False value.
1074
 
    
1075
 
    This works for methods and signals, and also for D-Bus properties
1076
 
    (from DBusObjectWithProperties) and interfaces (from the
1077
 
    dbus_interface_annotations decorator).
1078
 
    """
1079
 
    def wrapper(cls):
1080
 
        for orig_interface_name, alt_interface_name in (
1081
 
            alt_interface_names.iteritems()):
1082
 
            attr = {}
1083
 
            interface_names = set()
1084
 
            # Go though all attributes of the class
1085
 
            for attrname, attribute in inspect.getmembers(cls):
1086
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1087
 
                # with the wrong interface name
1088
 
                if (not hasattr(attribute, "_dbus_interface")
1089
 
                    or not attribute._dbus_interface
1090
 
                    .startswith(orig_interface_name)):
1091
 
                    continue
1092
 
                # Create an alternate D-Bus interface name based on
1093
 
                # the current name
1094
 
                alt_interface = (attribute._dbus_interface
1095
 
                                 .replace(orig_interface_name,
1096
 
                                          alt_interface_name))
1097
 
                interface_names.add(alt_interface)
1098
 
                # Is this a D-Bus signal?
1099
 
                if getattr(attribute, "_dbus_is_signal", False):
1100
 
                    # Extract the original non-method undecorated
1101
 
                    # function by black magic
1102
 
                    nonmethod_func = (dict(
1103
 
                            zip(attribute.func_code.co_freevars,
1104
 
                                attribute.__closure__))["func"]
1105
 
                                      .cell_contents)
1106
 
                    # Create a new, but exactly alike, function
1107
 
                    # object, and decorate it to be a new D-Bus signal
1108
 
                    # with the alternate D-Bus interface name
1109
 
                    new_function = (dbus.service.signal
1110
 
                                    (alt_interface,
1111
 
                                     attribute._dbus_signature)
1112
 
                                    (types.FunctionType(
1113
 
                                nonmethod_func.func_code,
1114
 
                                nonmethod_func.func_globals,
1115
 
                                nonmethod_func.func_name,
1116
 
                                nonmethod_func.func_defaults,
1117
 
                                nonmethod_func.func_closure)))
1118
 
                    # Copy annotations, if any
1119
 
                    try:
1120
 
                        new_function._dbus_annotations = (
1121
 
                            dict(attribute._dbus_annotations))
1122
 
                    except AttributeError:
1123
 
                        pass
1124
 
                    # Define a creator of a function to call both the
1125
 
                    # original and alternate functions, so both the
1126
 
                    # original and alternate signals gets sent when
1127
 
                    # the function is called
1128
 
                    def fixscope(func1, func2):
1129
 
                        """This function is a scope container to pass
1130
 
                        func1 and func2 to the "call_both" function
1131
 
                        outside of its arguments"""
1132
 
                        def call_both(*args, **kwargs):
1133
 
                            """This function will emit two D-Bus
1134
 
                            signals by calling func1 and func2"""
1135
 
                            func1(*args, **kwargs)
1136
 
                            func2(*args, **kwargs)
1137
 
                        return call_both
1138
 
                    # Create the "call_both" function and add it to
1139
 
                    # the class
1140
 
                    attr[attrname] = fixscope(attribute, new_function)
1141
 
                # Is this a D-Bus method?
1142
 
                elif getattr(attribute, "_dbus_is_method", False):
1143
 
                    # Create a new, but exactly alike, function
1144
 
                    # object.  Decorate it to be a new D-Bus method
1145
 
                    # with the alternate D-Bus interface name.  Add it
1146
 
                    # to the class.
1147
 
                    attr[attrname] = (dbus.service.method
1148
 
                                      (alt_interface,
1149
 
                                       attribute._dbus_in_signature,
1150
 
                                       attribute._dbus_out_signature)
1151
 
                                      (types.FunctionType
1152
 
                                       (attribute.func_code,
1153
 
                                        attribute.func_globals,
1154
 
                                        attribute.func_name,
1155
 
                                        attribute.func_defaults,
1156
 
                                        attribute.func_closure)))
1157
 
                    # Copy annotations, if any
1158
 
                    try:
1159
 
                        attr[attrname]._dbus_annotations = (
1160
 
                            dict(attribute._dbus_annotations))
1161
 
                    except AttributeError:
1162
 
                        pass
1163
 
                # Is this a D-Bus property?
1164
 
                elif getattr(attribute, "_dbus_is_property", False):
1165
 
                    # Create a new, but exactly alike, function
1166
 
                    # object, and decorate it to be a new D-Bus
1167
 
                    # property with the alternate D-Bus interface
1168
 
                    # name.  Add it to the class.
1169
 
                    attr[attrname] = (dbus_service_property
1170
 
                                      (alt_interface,
1171
 
                                       attribute._dbus_signature,
1172
 
                                       attribute._dbus_access,
1173
 
                                       attribute
1174
 
                                       ._dbus_get_args_options
1175
 
                                       ["byte_arrays"])
1176
 
                                      (types.FunctionType
1177
 
                                       (attribute.func_code,
1178
 
                                        attribute.func_globals,
1179
 
                                        attribute.func_name,
1180
 
                                        attribute.func_defaults,
1181
 
                                        attribute.func_closure)))
1182
 
                    # Copy annotations, if any
1183
 
                    try:
1184
 
                        attr[attrname]._dbus_annotations = (
1185
 
                            dict(attribute._dbus_annotations))
1186
 
                    except AttributeError:
1187
 
                        pass
1188
 
                # Is this a D-Bus interface?
1189
 
                elif getattr(attribute, "_dbus_is_interface", False):
1190
 
                    # Create a new, but exactly alike, function
1191
 
                    # object.  Decorate it to be a new D-Bus interface
1192
 
                    # with the alternate D-Bus interface name.  Add it
1193
 
                    # to the class.
1194
 
                    attr[attrname] = (dbus_interface_annotations
1195
 
                                      (alt_interface)
1196
 
                                      (types.FunctionType
1197
 
                                       (attribute.func_code,
1198
 
                                        attribute.func_globals,
1199
 
                                        attribute.func_name,
1200
 
                                        attribute.func_defaults,
1201
 
                                        attribute.func_closure)))
1202
 
            if deprecate:
1203
 
                # Deprecate all alternate interfaces
1204
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1205
 
                for interface_name in interface_names:
1206
 
                    @dbus_interface_annotations(interface_name)
1207
 
                    def func(self):
1208
 
                        return { "org.freedesktop.DBus.Deprecated":
1209
 
                                     "true" }
1210
 
                    # Find an unused name
1211
 
                    for aname in (iname.format(i)
1212
 
                                  for i in itertools.count()):
1213
 
                        if aname not in attr:
1214
 
                            attr[aname] = func
1215
 
                            break
1216
 
            if interface_names:
1217
 
                # Replace the class with a new subclass of it with
1218
 
                # methods, signals, etc. as created above.
1219
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1220
 
                           (cls,), attr)
1221
 
        return cls
1222
 
    return wrapper
1223
 
 
1224
 
 
1225
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1226
 
                                "se.bsnet.fukt.Mandos"})
1227
 
class ClientDBus(Client, DBusObjectWithProperties):
1228
 
    """A Client class using D-Bus
1229
 
    
1230
 
    Attributes:
1231
 
    dbus_object_path: dbus.ObjectPath
1232
 
    bus: dbus.SystemBus()
1233
 
    """
1234
 
    
1235
 
    runtime_expansions = (Client.runtime_expansions
1236
 
                          + ("dbus_object_path",))
1237
 
    
1238
 
    # dbus.service.Object doesn't use super(), so we can't either.
1239
 
    
1240
 
    def __init__(self, bus = None, *args, **kwargs):
1241
 
        self.bus = bus
1242
 
        Client.__init__(self, *args, **kwargs)
1243
 
        # Only now, when this client is initialized, can it show up on
1244
 
        # the D-Bus
1245
 
        client_object_name = unicode(self.name).translate(
1246
 
            {ord("."): ord("_"),
1247
 
             ord("-"): ord("_")})
1248
 
        self.dbus_object_path = (dbus.ObjectPath
1249
 
                                 ("/clients/" + client_object_name))
1250
 
        DBusObjectWithProperties.__init__(self, self.bus,
1251
 
                                          self.dbus_object_path)
1252
 
    
1253
 
    def notifychangeproperty(transform_func,
1254
 
                             dbus_name, type_func=lambda x: x,
1255
 
                             variant_level=1):
1256
 
        """ Modify a variable so that it's a property which announces
1257
 
        its changes to DBus.
1258
 
        
1259
 
        transform_fun: Function that takes a value and a variant_level
1260
 
                       and transforms it to a D-Bus type.
1261
 
        dbus_name: D-Bus name of the variable
1262
 
        type_func: Function that transform the value before sending it
1263
 
                   to the D-Bus.  Default: no transform
1264
 
        variant_level: D-Bus variant level.  Default: 1
1265
 
        """
1266
 
        attrname = "_{0}".format(dbus_name)
1267
 
        def setter(self, value):
1268
 
            if hasattr(self, "dbus_object_path"):
1269
 
                if (not hasattr(self, attrname) or
1270
 
                    type_func(getattr(self, attrname, None))
1271
 
                    != type_func(value)):
1272
 
                    dbus_value = transform_func(type_func(value),
1273
 
                                                variant_level
1274
 
                                                =variant_level)
1275
 
                    self.PropertyChanged(dbus.String(dbus_name),
1276
 
                                         dbus_value)
1277
 
            setattr(self, attrname, value)
1278
 
        
1279
 
        return property(lambda self: getattr(self, attrname), setter)
1280
 
    
1281
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1282
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1283
 
                                             "ApprovalPending",
1284
 
                                             type_func = bool)
1285
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1286
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1287
 
                                        "LastEnabled")
1288
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1289
 
                                   type_func = lambda checker:
1290
 
                                       checker is not None)
1291
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1292
 
                                           "LastCheckedOK")
1293
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1294
 
                                               "LastCheckerStatus")
1295
 
    last_approval_request = notifychangeproperty(
1296
 
        datetime_to_dbus, "LastApprovalRequest")
1297
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1298
 
                                               "ApprovedByDefault")
1299
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1300
 
                                          "ApprovalDelay",
1301
 
                                          type_func =
1302
 
                                          timedelta_to_milliseconds)
1303
 
    approval_duration = notifychangeproperty(
1304
 
        dbus.UInt64, "ApprovalDuration",
1305
 
        type_func = timedelta_to_milliseconds)
1306
 
    host = notifychangeproperty(dbus.String, "Host")
1307
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1308
 
                                   type_func =
1309
 
                                   timedelta_to_milliseconds)
1310
 
    extended_timeout = notifychangeproperty(
1311
 
        dbus.UInt64, "ExtendedTimeout",
1312
 
        type_func = timedelta_to_milliseconds)
1313
 
    interval = notifychangeproperty(dbus.UInt64,
1314
 
                                    "Interval",
1315
 
                                    type_func =
1316
 
                                    timedelta_to_milliseconds)
1317
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1318
 
    
1319
 
    del notifychangeproperty
1320
 
    
1321
 
    def __del__(self, *args, **kwargs):
1322
 
        try:
1323
 
            self.remove_from_connection()
1324
 
        except LookupError:
1325
 
            pass
1326
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1327
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1328
 
        Client.__del__(self, *args, **kwargs)
1329
 
    
1330
 
    def checker_callback(self, pid, condition, command,
1331
 
                         *args, **kwargs):
 
242
        gobject.source_remove(self.checker_callback_tag)
1332
243
        self.checker_callback_tag = None
 
244
        os.kill(self.checker.pid, signal.SIGTERM)
 
245
        if self.checker.poll() is None:
 
246
            os.kill(self.checker.pid, signal.SIGKILL)
1333
247
        self.checker = None
1334
 
        if os.WIFEXITED(condition):
1335
 
            exitstatus = os.WEXITSTATUS(condition)
1336
 
            # Emit D-Bus signal
1337
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1338
 
                                  dbus.Int64(condition),
1339
 
                                  dbus.String(command))
1340
 
        else:
1341
 
            # Emit D-Bus signal
1342
 
            self.CheckerCompleted(dbus.Int16(-1),
1343
 
                                  dbus.Int64(condition),
1344
 
                                  dbus.String(command))
1345
 
        
1346
 
        return Client.checker_callback(self, pid, condition, command,
1347
 
                                       *args, **kwargs)
1348
 
    
1349
 
    def start_checker(self, *args, **kwargs):
1350
 
        old_checker = self.checker
1351
 
        if self.checker is not None:
1352
 
            old_checker_pid = self.checker.pid
1353
 
        else:
1354
 
            old_checker_pid = None
1355
 
        r = Client.start_checker(self, *args, **kwargs)
1356
 
        # Only if new checker process was started
1357
 
        if (self.checker is not None
1358
 
            and old_checker_pid != self.checker.pid):
1359
 
            # Emit D-Bus signal
1360
 
            self.CheckerStarted(self.current_checker_command)
1361
 
        return r
1362
 
    
1363
 
    def _reset_approved(self):
1364
 
        self.approved = None
1365
 
        return False
1366
 
    
1367
 
    def approve(self, value=True):
1368
 
        self.approved = value
1369
 
        gobject.timeout_add(timedelta_to_milliseconds
1370
 
                            (self.approval_duration),
1371
 
                            self._reset_approved)
1372
 
        self.send_changedstate()
1373
 
    
1374
 
    ## D-Bus methods, signals & properties
1375
 
    _interface = "se.recompile.Mandos.Client"
1376
 
    
1377
 
    ## Interfaces
1378
 
    
1379
 
    @dbus_interface_annotations(_interface)
1380
 
    def _foo(self):
1381
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1382
 
                     "false"}
1383
 
    
1384
 
    ## Signals
1385
 
    
1386
 
    # CheckerCompleted - signal
1387
 
    @dbus.service.signal(_interface, signature="nxs")
1388
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1389
 
        "D-Bus signal"
1390
 
        pass
1391
 
    
1392
 
    # CheckerStarted - signal
1393
 
    @dbus.service.signal(_interface, signature="s")
1394
 
    def CheckerStarted(self, command):
1395
 
        "D-Bus signal"
1396
 
        pass
1397
 
    
1398
 
    # PropertyChanged - signal
1399
 
    @dbus.service.signal(_interface, signature="sv")
1400
 
    def PropertyChanged(self, property, value):
1401
 
        "D-Bus signal"
1402
 
        pass
1403
 
    
1404
 
    # GotSecret - signal
1405
 
    @dbus.service.signal(_interface)
1406
 
    def GotSecret(self):
1407
 
        """D-Bus signal
1408
 
        Is sent after a successful transfer of secret from the Mandos
1409
 
        server to mandos-client
1410
 
        """
1411
 
        pass
1412
 
    
1413
 
    # Rejected - signal
1414
 
    @dbus.service.signal(_interface, signature="s")
1415
 
    def Rejected(self, reason):
1416
 
        "D-Bus signal"
1417
 
        pass
1418
 
    
1419
 
    # NeedApproval - signal
1420
 
    @dbus.service.signal(_interface, signature="tb")
1421
 
    def NeedApproval(self, timeout, default):
1422
 
        "D-Bus signal"
1423
 
        return self.need_approval()
1424
 
    
1425
 
    ## Methods
1426
 
    
1427
 
    # Approve - method
1428
 
    @dbus.service.method(_interface, in_signature="b")
1429
 
    def Approve(self, value):
1430
 
        self.approve(value)
1431
 
    
1432
 
    # CheckedOK - method
1433
 
    @dbus.service.method(_interface)
1434
 
    def CheckedOK(self):
1435
 
        self.checked_ok()
1436
 
    
1437
 
    # Enable - method
1438
 
    @dbus.service.method(_interface)
1439
 
    def Enable(self):
1440
 
        "D-Bus method"
1441
 
        self.enable()
1442
 
    
1443
 
    # StartChecker - method
1444
 
    @dbus.service.method(_interface)
1445
 
    def StartChecker(self):
1446
 
        "D-Bus method"
1447
 
        self.start_checker()
1448
 
    
1449
 
    # Disable - method
1450
 
    @dbus.service.method(_interface)
1451
 
    def Disable(self):
1452
 
        "D-Bus method"
1453
 
        self.disable()
1454
 
    
1455
 
    # StopChecker - method
1456
 
    @dbus.service.method(_interface)
1457
 
    def StopChecker(self):
1458
 
        self.stop_checker()
1459
 
    
1460
 
    ## Properties
1461
 
    
1462
 
    # ApprovalPending - property
1463
 
    @dbus_service_property(_interface, signature="b", access="read")
1464
 
    def ApprovalPending_dbus_property(self):
1465
 
        return dbus.Boolean(bool(self.approvals_pending))
1466
 
    
1467
 
    # ApprovedByDefault - property
1468
 
    @dbus_service_property(_interface, signature="b",
1469
 
                           access="readwrite")
1470
 
    def ApprovedByDefault_dbus_property(self, value=None):
1471
 
        if value is None:       # get
1472
 
            return dbus.Boolean(self.approved_by_default)
1473
 
        self.approved_by_default = bool(value)
1474
 
    
1475
 
    # ApprovalDelay - property
1476
 
    @dbus_service_property(_interface, signature="t",
1477
 
                           access="readwrite")
1478
 
    def ApprovalDelay_dbus_property(self, value=None):
1479
 
        if value is None:       # get
1480
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1481
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1482
 
    
1483
 
    # ApprovalDuration - property
1484
 
    @dbus_service_property(_interface, signature="t",
1485
 
                           access="readwrite")
1486
 
    def ApprovalDuration_dbus_property(self, value=None):
1487
 
        if value is None:       # get
1488
 
            return dbus.UInt64(timedelta_to_milliseconds(
1489
 
                    self.approval_duration))
1490
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1491
 
    
1492
 
    # Name - property
1493
 
    @dbus_service_property(_interface, signature="s", access="read")
1494
 
    def Name_dbus_property(self):
1495
 
        return dbus.String(self.name)
1496
 
    
1497
 
    # Fingerprint - property
1498
 
    @dbus_service_property(_interface, signature="s", access="read")
1499
 
    def Fingerprint_dbus_property(self):
1500
 
        return dbus.String(self.fingerprint)
1501
 
    
1502
 
    # Host - property
1503
 
    @dbus_service_property(_interface, signature="s",
1504
 
                           access="readwrite")
1505
 
    def Host_dbus_property(self, value=None):
1506
 
        if value is None:       # get
1507
 
            return dbus.String(self.host)
1508
 
        self.host = unicode(value)
1509
 
    
1510
 
    # Created - property
1511
 
    @dbus_service_property(_interface, signature="s", access="read")
1512
 
    def Created_dbus_property(self):
1513
 
        return datetime_to_dbus(self.created)
1514
 
    
1515
 
    # LastEnabled - property
1516
 
    @dbus_service_property(_interface, signature="s", access="read")
1517
 
    def LastEnabled_dbus_property(self):
1518
 
        return datetime_to_dbus(self.last_enabled)
1519
 
    
1520
 
    # Enabled - property
1521
 
    @dbus_service_property(_interface, signature="b",
1522
 
                           access="readwrite")
1523
 
    def Enabled_dbus_property(self, value=None):
1524
 
        if value is None:       # get
1525
 
            return dbus.Boolean(self.enabled)
1526
 
        if value:
1527
 
            self.enable()
1528
 
        else:
1529
 
            self.disable()
1530
 
    
1531
 
    # LastCheckedOK - property
1532
 
    @dbus_service_property(_interface, signature="s",
1533
 
                           access="readwrite")
1534
 
    def LastCheckedOK_dbus_property(self, value=None):
1535
 
        if value is not None:
1536
 
            self.checked_ok()
1537
 
            return
1538
 
        return datetime_to_dbus(self.last_checked_ok)
1539
 
    
1540
 
    # LastCheckerStatus - property
1541
 
    @dbus_service_property(_interface, signature="n",
1542
 
                           access="read")
1543
 
    def LastCheckerStatus_dbus_property(self):
1544
 
        return dbus.Int16(self.last_checker_status)
1545
 
    
1546
 
    # Expires - property
1547
 
    @dbus_service_property(_interface, signature="s", access="read")
1548
 
    def Expires_dbus_property(self):
1549
 
        return datetime_to_dbus(self.expires)
1550
 
    
1551
 
    # LastApprovalRequest - property
1552
 
    @dbus_service_property(_interface, signature="s", access="read")
1553
 
    def LastApprovalRequest_dbus_property(self):
1554
 
        return datetime_to_dbus(self.last_approval_request)
1555
 
    
1556
 
    # Timeout - property
1557
 
    @dbus_service_property(_interface, signature="t",
1558
 
                           access="readwrite")
1559
 
    def Timeout_dbus_property(self, value=None):
1560
 
        if value is None:       # get
1561
 
            return dbus.UInt64(self.timeout_milliseconds())
1562
 
        old_timeout = self.timeout
1563
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1564
 
        # Reschedule disabling
1565
 
        if self.enabled:
1566
 
            now = datetime.datetime.utcnow()
1567
 
            self.expires += self.timeout - old_timeout
1568
 
            if self.expires <= now:
1569
 
                # The timeout has passed
1570
 
                self.disable()
1571
 
            else:
1572
 
                if (getattr(self, "disable_initiator_tag", None)
1573
 
                    is None):
1574
 
                    return
1575
 
                gobject.source_remove(self.disable_initiator_tag)
1576
 
                self.disable_initiator_tag = (
1577
 
                    gobject.timeout_add(
1578
 
                        timedelta_to_milliseconds(self.expires - now),
1579
 
                        self.disable))
1580
 
    
1581
 
    # ExtendedTimeout - property
1582
 
    @dbus_service_property(_interface, signature="t",
1583
 
                           access="readwrite")
1584
 
    def ExtendedTimeout_dbus_property(self, value=None):
1585
 
        if value is None:       # get
1586
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1587
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
 
    
1589
 
    # Interval - property
1590
 
    @dbus_service_property(_interface, signature="t",
1591
 
                           access="readwrite")
1592
 
    def Interval_dbus_property(self, value=None):
1593
 
        if value is None:       # get
1594
 
            return dbus.UInt64(self.interval_milliseconds())
1595
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1596
 
        if getattr(self, "checker_initiator_tag", None) is None:
1597
 
            return
1598
 
        if self.enabled:
1599
 
            # Reschedule checker run
1600
 
            gobject.source_remove(self.checker_initiator_tag)
1601
 
            self.checker_initiator_tag = (gobject.timeout_add
1602
 
                                          (value, self.start_checker))
1603
 
            self.start_checker()    # Start one now, too
1604
 
    
1605
 
    # Checker - property
1606
 
    @dbus_service_property(_interface, signature="s",
1607
 
                           access="readwrite")
1608
 
    def Checker_dbus_property(self, value=None):
1609
 
        if value is None:       # get
1610
 
            return dbus.String(self.checker_command)
1611
 
        self.checker_command = unicode(value)
1612
 
    
1613
 
    # CheckerRunning - property
1614
 
    @dbus_service_property(_interface, signature="b",
1615
 
                           access="readwrite")
1616
 
    def CheckerRunning_dbus_property(self, value=None):
1617
 
        if value is None:       # get
1618
 
            return dbus.Boolean(self.checker is not None)
1619
 
        if value:
1620
 
            self.start_checker()
1621
 
        else:
1622
 
            self.stop_checker()
1623
 
    
1624
 
    # ObjectPath - property
1625
 
    @dbus_service_property(_interface, signature="o", access="read")
1626
 
    def ObjectPath_dbus_property(self):
1627
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1628
 
    
1629
 
    # Secret = property
1630
 
    @dbus_service_property(_interface, signature="ay",
1631
 
                           access="write", byte_arrays=True)
1632
 
    def Secret_dbus_property(self, value):
1633
 
        self.secret = str(value)
1634
 
    
1635
 
    del _interface
1636
 
 
1637
 
 
1638
 
class ProxyClient(object):
1639
 
    def __init__(self, child_pipe, fpr, address):
1640
 
        self._pipe = child_pipe
1641
 
        self._pipe.send(('init', fpr, address))
1642
 
        if not self._pipe.recv():
1643
 
            raise KeyError()
1644
 
    
1645
 
    def __getattribute__(self, name):
1646
 
        if name == '_pipe':
1647
 
            return super(ProxyClient, self).__getattribute__(name)
1648
 
        self._pipe.send(('getattr', name))
1649
 
        data = self._pipe.recv()
1650
 
        if data[0] == 'data':
1651
 
            return data[1]
1652
 
        if data[0] == 'function':
1653
 
            def func(*args, **kwargs):
1654
 
                self._pipe.send(('funcall', name, args, kwargs))
1655
 
                return self._pipe.recv()[1]
1656
 
            return func
1657
 
    
1658
 
    def __setattr__(self, name, value):
1659
 
        if name == '_pipe':
1660
 
            return super(ProxyClient, self).__setattr__(name, value)
1661
 
        self._pipe.send(('setattr', name, value))
1662
 
 
1663
 
 
1664
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1665
 
    """A class to handle client connections.
1666
 
    
1667
 
    Instantiated once for each connection to handle it.
 
248
    def still_valid(self, now=None):
 
249
        """Has the timeout not yet passed for this client?"""
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
 
253
            return now < (self.created + self.timeout)
 
254
        else:
 
255
            return now < (self.last_seen + self.timeout)
 
256
 
 
257
 
 
258
def peer_certificate(session):
 
259
    # If not an OpenPGP certificate...
 
260
    if gnutls.library.functions.gnutls_certificate_type_get\
 
261
            (session._c_object) \
 
262
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
263
        # ...do the normal thing
 
264
        return session.peer_certificate
 
265
    list_size = ctypes.c_uint()
 
266
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
267
        (session._c_object, ctypes.byref(list_size))
 
268
    if list_size.value == 0:
 
269
        return None
 
270
    cert = cert_list[0]
 
271
    return ctypes.string_at(cert.data, cert.size)
 
272
 
 
273
 
 
274
def fingerprint(openpgp):
 
275
    # New empty GnuTLS certificate
 
276
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
277
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
278
        (ctypes.byref(crt))
 
279
    # New GnuTLS "datum" with the OpenPGP public key
 
280
    datum = gnutls.library.types.gnutls_datum_t\
 
281
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
282
                     ctypes.POINTER(ctypes.c_ubyte)),
 
283
         ctypes.c_uint(len(openpgp)))
 
284
    # Import the OpenPGP public key into the certificate
 
285
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
286
        (crt,
 
287
         ctypes.byref(datum),
 
288
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
289
    # New buffer for the fingerprint
 
290
    buffer = ctypes.create_string_buffer(20)
 
291
    buffer_length = ctypes.c_size_t()
 
292
    # Get the fingerprint from the certificate into the buffer
 
293
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
294
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
295
    # Deinit the certificate
 
296
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
297
    # Convert the buffer to a Python bytestring
 
298
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
299
    # Convert the bytestring to hexadecimal notation
 
300
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
301
    return hex_fpr
 
302
 
 
303
 
 
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
305
    """A TCP request handler class.
 
306
    Instantiated by IPv6_TCPServer for each request to handle it.
1668
307
    Note: This will run in its own forked process."""
1669
308
    
1670
309
    def handle(self):
1671
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
 
            logger.info("TCP connection from: %s",
1673
 
                        unicode(self.client_address))
1674
 
            logger.debug("Pipe FD: %d",
1675
 
                         self.server.child_pipe.fileno())
1676
 
            
1677
 
            session = (gnutls.connection
1678
 
                       .ClientSession(self.request,
1679
 
                                      gnutls.connection
1680
 
                                      .X509Credentials()))
1681
 
            
1682
 
            # Note: gnutls.connection.X509Credentials is really a
1683
 
            # generic GnuTLS certificate credentials object so long as
1684
 
            # no X.509 keys are added to it.  Therefore, we can use it
1685
 
            # here despite using OpenPGP certificates.
1686
 
            
1687
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
 
            #                      "+AES-256-CBC", "+SHA1",
1689
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1690
 
            #                      "+DHE-DSS"))
1691
 
            # Use a fallback default, since this MUST be set.
1692
 
            priority = self.server.gnutls_priority
1693
 
            if priority is None:
1694
 
                priority = "NORMAL"
1695
 
            (gnutls.library.functions
1696
 
             .gnutls_priority_set_direct(session._c_object,
1697
 
                                         priority, None))
1698
 
            
1699
 
            # Start communication using the Mandos protocol
1700
 
            # Get protocol number
1701
 
            line = self.request.makefile().readline()
1702
 
            logger.debug("Protocol version: %r", line)
1703
 
            try:
1704
 
                if int(line.strip().split()[0]) > 1:
1705
 
                    raise RuntimeError
1706
 
            except (ValueError, IndexError, RuntimeError) as error:
1707
 
                logger.error("Unknown protocol version: %s", error)
1708
 
                return
1709
 
            
1710
 
            # Start GnuTLS connection
1711
 
            try:
1712
 
                session.handshake()
1713
 
            except gnutls.errors.GNUTLSError as error:
1714
 
                logger.warning("Handshake failed: %s", error)
1715
 
                # Do not run session.bye() here: the session is not
1716
 
                # established.  Just abandon the request.
1717
 
                return
1718
 
            logger.debug("Handshake succeeded")
1719
 
            
1720
 
            approval_required = False
1721
 
            try:
1722
 
                try:
1723
 
                    fpr = self.fingerprint(self.peer_certificate
1724
 
                                           (session))
1725
 
                except (TypeError,
1726
 
                        gnutls.errors.GNUTLSError) as error:
1727
 
                    logger.warning("Bad certificate: %s", error)
1728
 
                    return
1729
 
                logger.debug("Fingerprint: %s", fpr)
1730
 
                
1731
 
                try:
1732
 
                    client = ProxyClient(child_pipe, fpr,
1733
 
                                         self.client_address)
1734
 
                except KeyError:
1735
 
                    return
1736
 
                
1737
 
                if client.approval_delay:
1738
 
                    delay = client.approval_delay
1739
 
                    client.approvals_pending += 1
1740
 
                    approval_required = True
1741
 
                
1742
 
                while True:
1743
 
                    if not client.enabled:
1744
 
                        logger.info("Client %s is disabled",
1745
 
                                       client.name)
1746
 
                        if self.server.use_dbus:
1747
 
                            # Emit D-Bus signal
1748
 
                            client.Rejected("Disabled")
1749
 
                        return
1750
 
                    
1751
 
                    if client.approved or not client.approval_delay:
1752
 
                        #We are approved or approval is disabled
1753
 
                        break
1754
 
                    elif client.approved is None:
1755
 
                        logger.info("Client %s needs approval",
1756
 
                                    client.name)
1757
 
                        if self.server.use_dbus:
1758
 
                            # Emit D-Bus signal
1759
 
                            client.NeedApproval(
1760
 
                                client.approval_delay_milliseconds(),
1761
 
                                client.approved_by_default)
1762
 
                    else:
1763
 
                        logger.warning("Client %s was not approved",
1764
 
                                       client.name)
1765
 
                        if self.server.use_dbus:
1766
 
                            # Emit D-Bus signal
1767
 
                            client.Rejected("Denied")
1768
 
                        return
1769
 
                    
1770
 
                    #wait until timeout or approved
1771
 
                    time = datetime.datetime.now()
1772
 
                    client.changedstate.acquire()
1773
 
                    client.changedstate.wait(
1774
 
                        float(timedelta_to_milliseconds(delay)
1775
 
                              / 1000))
1776
 
                    client.changedstate.release()
1777
 
                    time2 = datetime.datetime.now()
1778
 
                    if (time2 - time) >= delay:
1779
 
                        if not client.approved_by_default:
1780
 
                            logger.warning("Client %s timed out while"
1781
 
                                           " waiting for approval",
1782
 
                                           client.name)
1783
 
                            if self.server.use_dbus:
1784
 
                                # Emit D-Bus signal
1785
 
                                client.Rejected("Approval timed out")
1786
 
                            return
1787
 
                        else:
1788
 
                            break
1789
 
                    else:
1790
 
                        delay -= time2 - time
1791
 
                
1792
 
                sent_size = 0
1793
 
                while sent_size < len(client.secret):
1794
 
                    try:
1795
 
                        sent = session.send(client.secret[sent_size:])
1796
 
                    except gnutls.errors.GNUTLSError as error:
1797
 
                        logger.warning("gnutls send failed",
1798
 
                                       exc_info=error)
1799
 
                        return
1800
 
                    logger.debug("Sent: %d, remaining: %d",
1801
 
                                 sent, len(client.secret)
1802
 
                                 - (sent_size + sent))
1803
 
                    sent_size += sent
1804
 
                
1805
 
                logger.info("Sending secret to %s", client.name)
1806
 
                # bump the timeout using extended_timeout
1807
 
                client.bump_timeout(client.extended_timeout)
1808
 
                if self.server.use_dbus:
1809
 
                    # Emit D-Bus signal
1810
 
                    client.GotSecret()
1811
 
            
1812
 
            finally:
1813
 
                if approval_required:
1814
 
                    client.approvals_pending -= 1
1815
 
                try:
1816
 
                    session.bye()
1817
 
                except gnutls.errors.GNUTLSError as error:
1818
 
                    logger.warning("GnuTLS bye failed",
1819
 
                                   exc_info=error)
1820
 
    
1821
 
    @staticmethod
1822
 
    def peer_certificate(session):
1823
 
        "Return the peer's OpenPGP certificate as a bytestring"
1824
 
        # If not an OpenPGP certificate...
1825
 
        if (gnutls.library.functions
1826
 
            .gnutls_certificate_type_get(session._c_object)
1827
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1828
 
            # ...do the normal thing
1829
 
            return session.peer_certificate
1830
 
        list_size = ctypes.c_uint(1)
1831
 
        cert_list = (gnutls.library.functions
1832
 
                     .gnutls_certificate_get_peers
1833
 
                     (session._c_object, ctypes.byref(list_size)))
1834
 
        if not bool(cert_list) and list_size.value != 0:
1835
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1836
 
                                            " certificate")
1837
 
        if list_size.value == 0:
1838
 
            return None
1839
 
        cert = cert_list[0]
1840
 
        return ctypes.string_at(cert.data, cert.size)
1841
 
    
1842
 
    @staticmethod
1843
 
    def fingerprint(openpgp):
1844
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1845
 
        # New GnuTLS "datum" with the OpenPGP public key
1846
 
        datum = (gnutls.library.types
1847
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1848
 
                                             ctypes.POINTER
1849
 
                                             (ctypes.c_ubyte)),
1850
 
                                 ctypes.c_uint(len(openpgp))))
1851
 
        # New empty GnuTLS certificate
1852
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1853
 
        (gnutls.library.functions
1854
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1855
 
        # Import the OpenPGP public key into the certificate
1856
 
        (gnutls.library.functions
1857
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1858
 
                                    gnutls.library.constants
1859
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1860
 
        # Verify the self signature in the key
1861
 
        crtverify = ctypes.c_uint()
1862
 
        (gnutls.library.functions
1863
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1864
 
                                         ctypes.byref(crtverify)))
1865
 
        if crtverify.value != 0:
1866
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1867
 
            raise (gnutls.errors.CertificateSecurityError
1868
 
                   ("Verify failed"))
1869
 
        # New buffer for the fingerprint
1870
 
        buf = ctypes.create_string_buffer(20)
1871
 
        buf_len = ctypes.c_size_t()
1872
 
        # Get the fingerprint from the certificate into the buffer
1873
 
        (gnutls.library.functions
1874
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1875
 
                                             ctypes.byref(buf_len)))
1876
 
        # Deinit the certificate
1877
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1878
 
        # Convert the buffer to a Python bytestring
1879
 
        fpr = ctypes.string_at(buf, buf_len.value)
1880
 
        # Convert the bytestring to hexadecimal notation
1881
 
        hex_fpr = binascii.hexlify(fpr).upper()
1882
 
        return hex_fpr
1883
 
 
1884
 
 
1885
 
class MultiprocessingMixIn(object):
1886
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1887
 
    def sub_process_main(self, request, address):
1888
 
        try:
1889
 
            self.finish_request(request, address)
1890
 
        except Exception:
1891
 
            self.handle_error(request, address)
1892
 
        self.close_request(request)
1893
 
    
1894
 
    def process_request(self, request, address):
1895
 
        """Start a new process to process the request."""
1896
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1897
 
                                       args = (request, address))
1898
 
        proc.start()
1899
 
        return proc
1900
 
 
1901
 
 
1902
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1903
 
    """ adds a pipe to the MixIn """
1904
 
    def process_request(self, request, client_address):
1905
 
        """Overrides and wraps the original process_request().
1906
 
        
1907
 
        This function creates a new pipe in self.pipe
1908
 
        """
1909
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1910
 
        
1911
 
        proc = MultiprocessingMixIn.process_request(self, request,
1912
 
                                                    client_address)
1913
 
        self.child_pipe.close()
1914
 
        self.add_pipe(parent_pipe, proc)
1915
 
    
1916
 
    def add_pipe(self, parent_pipe, proc):
1917
 
        """Dummy function; override as necessary"""
1918
 
        raise NotImplementedError
1919
 
 
1920
 
 
1921
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1922
 
                     socketserver.TCPServer, object):
1923
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1924
 
    
 
310
        logger.debug(u"TCP connection from: %s",
 
311
                     unicode(self.client_address))
 
312
        session = gnutls.connection.ClientSession(self.request,
 
313
                                                  gnutls.connection.\
 
314
                                                  X509Credentials())
 
315
        
 
316
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
317
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
318
        #                "+DHE-DSS"))
 
319
        priority = "SECURE256"
 
320
        
 
321
        gnutls.library.functions.gnutls_priority_set_direct\
 
322
            (session._c_object, priority, None);
 
323
        
 
324
        try:
 
325
            session.handshake()
 
326
        except gnutls.errors.GNUTLSError, error:
 
327
            logger.debug(u"Handshake failed: %s", error)
 
328
            # Do not run session.bye() here: the session is not
 
329
            # established.  Just abandon the request.
 
330
            return
 
331
        try:
 
332
            fpr = fingerprint(peer_certificate(session))
 
333
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
334
            logger.debug(u"Bad certificate: %s", error)
 
335
            session.bye()
 
336
            return
 
337
        logger.debug(u"Fingerprint: %s", fpr)
 
338
        client = None
 
339
        for c in clients:
 
340
            if c.fingerprint == fpr:
 
341
                client = c
 
342
                break
 
343
        # Have to check if client.still_valid(), since it is possible
 
344
        # that the client timed out while establishing the GnuTLS
 
345
        # session.
 
346
        if (not client) or (not client.still_valid()):
 
347
            if client:
 
348
                logger.debug(u"Client %(name)s is invalid",
 
349
                             vars(client))
 
350
            else:
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
 
353
            session.bye()
 
354
            return
 
355
        sent_size = 0
 
356
        while sent_size < len(client.secret):
 
357
            sent = session.send(client.secret[sent_size:])
 
358
            logger.debug(u"Sent: %d, remaining: %d",
 
359
                         sent, len(client.secret)
 
360
                         - (sent_size + sent))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1925
367
    Attributes:
1926
 
        enabled:        Boolean; whether this server is activated yet
1927
 
        interface:      None or a network interface name (string)
1928
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1929
370
    """
1930
 
    def __init__(self, server_address, RequestHandlerClass,
1931
 
                 interface=None, use_ipv6=True, socketfd=None):
1932
 
        """If socketfd is set, use that file descriptor instead of
1933
 
        creating a new one with socket.socket().
1934
 
        """
1935
 
        self.interface = interface
1936
 
        if use_ipv6:
1937
 
            self.address_family = socket.AF_INET6
1938
 
        if socketfd is not None:
1939
 
            # Save the file descriptor
1940
 
            self.socketfd = socketfd
1941
 
            # Save the original socket.socket() function
1942
 
            self.socket_socket = socket.socket
1943
 
            # To implement --socket, we monkey patch socket.socket.
1944
 
            # 
1945
 
            # (When socketserver.TCPServer is a new-style class, we
1946
 
            # could make self.socket into a property instead of monkey
1947
 
            # patching socket.socket.)
1948
 
            # 
1949
 
            # Create a one-time-only replacement for socket.socket()
1950
 
            @functools.wraps(socket.socket)
1951
 
            def socket_wrapper(*args, **kwargs):
1952
 
                # Restore original function so subsequent calls are
1953
 
                # not affected.
1954
 
                socket.socket = self.socket_socket
1955
 
                del self.socket_socket
1956
 
                # This time only, return a new socket object from the
1957
 
                # saved file descriptor.
1958
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1959
 
            # Replace socket.socket() function with wrapper
1960
 
            socket.socket = socket_wrapper
1961
 
        # The socketserver.TCPServer.__init__ will call
1962
 
        # socket.socket(), which might be our replacement,
1963
 
        # socket_wrapper(), if socketfd was set.
1964
 
        socketserver.TCPServer.__init__(self, server_address,
1965
 
                                        RequestHandlerClass)
1966
 
    
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
1967
380
    def server_bind(self):
1968
381
        """This overrides the normal server_bind() function
1969
382
        to bind to an interface if one was specified, and also NOT to
1970
383
        bind to an address or port if they were not specified."""
1971
 
        if self.interface is not None:
1972
 
            if SO_BINDTODEVICE is None:
1973
 
                logger.error("SO_BINDTODEVICE does not exist;"
1974
 
                             " cannot bind to interface %s",
1975
 
                             self.interface)
1976
 
            else:
1977
 
                try:
1978
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1979
 
                                           SO_BINDTODEVICE,
1980
 
                                           str(self.interface + '\0'))
1981
 
                except socket.error as error:
1982
 
                    if error.errno == errno.EPERM:
1983
 
                        logger.error("No permission to bind to"
1984
 
                                     " interface %s", self.interface)
1985
 
                    elif error.errno == errno.ENOPROTOOPT:
1986
 
                        logger.error("SO_BINDTODEVICE not available;"
1987
 
                                     " cannot bind to interface %s",
1988
 
                                     self.interface)
1989
 
                    elif error.errno == errno.ENODEV:
1990
 
                        logger.error("Interface %s does not exist,"
1991
 
                                     " cannot bind", self.interface)
1992
 
                    else:
1993
 
                        raise
 
384
        if self.options.interface:
 
385
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
386
                # From /usr/include/asm-i486/socket.h
 
387
                socket.SO_BINDTODEVICE = 25
 
388
            try:
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    logger.warning(u"No permission to"
 
395
                                   u" bind to interface %s",
 
396
                                   self.options.interface)
 
397
                else:
 
398
                    raise error
1994
399
        # Only bind(2) the socket if we really need to.
1995
400
        if self.server_address[0] or self.server_address[1]:
1996
401
            if not self.server_address[0]:
1997
 
                if self.address_family == socket.AF_INET6:
1998
 
                    any_address = "::" # in6addr_any
1999
 
                else:
2000
 
                    any_address = "0.0.0.0" # INADDR_ANY
2001
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
2002
404
                                       self.server_address[1])
2003
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
2004
406
                self.server_address = (self.server_address[0],
2005
407
                                       0)
2006
 
#                 if self.interface:
2007
 
#                     self.server_address = (self.server_address[0],
2008
 
#                                            0, # port
2009
 
#                                            0, # flowinfo
2010
 
#                                            if_nametoindex
2011
 
#                                            (self.interface))
2012
 
            return socketserver.TCPServer.server_bind(self)
2013
 
 
2014
 
 
2015
 
class MandosServer(IPv6_TCPServer):
2016
 
    """Mandos server.
2017
 
    
2018
 
    Attributes:
2019
 
        clients:        set of Client objects
2020
 
        gnutls_priority GnuTLS priority string
2021
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2022
 
    
2023
 
    Assumes a gobject.MainLoop event loop.
2024
 
    """
2025
 
    def __init__(self, server_address, RequestHandlerClass,
2026
 
                 interface=None, use_ipv6=True, clients=None,
2027
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2028
 
        self.enabled = False
2029
 
        self.clients = clients
2030
 
        if self.clients is None:
2031
 
            self.clients = {}
2032
 
        self.use_dbus = use_dbus
2033
 
        self.gnutls_priority = gnutls_priority
2034
 
        IPv6_TCPServer.__init__(self, server_address,
2035
 
                                RequestHandlerClass,
2036
 
                                interface = interface,
2037
 
                                use_ipv6 = use_ipv6,
2038
 
                                socketfd = socketfd)
2039
 
    def server_activate(self):
2040
 
        if self.enabled:
2041
 
            return socketserver.TCPServer.server_activate(self)
2042
 
    
2043
 
    def enable(self):
2044
 
        self.enabled = True
2045
 
    
2046
 
    def add_pipe(self, parent_pipe, proc):
2047
 
        # Call "handle_ipc" for both data and EOF events
2048
 
        gobject.io_add_watch(parent_pipe.fileno(),
2049
 
                             gobject.IO_IN | gobject.IO_HUP,
2050
 
                             functools.partial(self.handle_ipc,
2051
 
                                               parent_pipe =
2052
 
                                               parent_pipe,
2053
 
                                               proc = proc))
2054
 
    
2055
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2056
 
                   proc = None, client_object=None):
2057
 
        # error, or the other end of multiprocessing.Pipe has closed
2058
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2059
 
            # Wait for other process to exit
2060
 
            proc.join()
2061
 
            return False
2062
 
        
2063
 
        # Read a request from the child
2064
 
        request = parent_pipe.recv()
2065
 
        command = request[0]
2066
 
        
2067
 
        if command == 'init':
2068
 
            fpr = request[1]
2069
 
            address = request[2]
2070
 
            
2071
 
            for c in self.clients.itervalues():
2072
 
                if c.fingerprint == fpr:
2073
 
                    client = c
2074
 
                    break
2075
 
            else:
2076
 
                logger.info("Client not found for fingerprint: %s, ad"
2077
 
                            "dress: %s", fpr, address)
2078
 
                if self.use_dbus:
2079
 
                    # Emit D-Bus signal
2080
 
                    mandos_dbus_service.ClientNotFound(fpr,
2081
 
                                                       address[0])
2082
 
                parent_pipe.send(False)
2083
 
                return False
2084
 
            
2085
 
            gobject.io_add_watch(parent_pipe.fileno(),
2086
 
                                 gobject.IO_IN | gobject.IO_HUP,
2087
 
                                 functools.partial(self.handle_ipc,
2088
 
                                                   parent_pipe =
2089
 
                                                   parent_pipe,
2090
 
                                                   proc = proc,
2091
 
                                                   client_object =
2092
 
                                                   client))
2093
 
            parent_pipe.send(True)
2094
 
            # remove the old hook in favor of the new above hook on
2095
 
            # same fileno
2096
 
            return False
2097
 
        if command == 'funcall':
2098
 
            funcname = request[1]
2099
 
            args = request[2]
2100
 
            kwargs = request[3]
2101
 
            
2102
 
            parent_pipe.send(('data', getattr(client_object,
2103
 
                                              funcname)(*args,
2104
 
                                                         **kwargs)))
2105
 
        
2106
 
        if command == 'getattr':
2107
 
            attrname = request[1]
2108
 
            if callable(client_object.__getattribute__(attrname)):
2109
 
                parent_pipe.send(('function',))
2110
 
            else:
2111
 
                parent_pipe.send(('data', client_object
2112
 
                                  .__getattribute__(attrname)))
2113
 
        
2114
 
        if command == 'setattr':
2115
 
            attrname = request[1]
2116
 
            value = request[2]
2117
 
            setattr(client_object, attrname, value)
2118
 
        
2119
 
        return True
2120
 
 
2121
 
 
2122
 
def rfc3339_duration_to_delta(duration):
2123
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2124
 
    
2125
 
    >>> rfc3339_duration_to_delta("P7D")
2126
 
    datetime.timedelta(7)
2127
 
    >>> rfc3339_duration_to_delta("PT60S")
2128
 
    datetime.timedelta(0, 60)
2129
 
    >>> rfc3339_duration_to_delta("PT60M")
2130
 
    datetime.timedelta(0, 3600)
2131
 
    >>> rfc3339_duration_to_delta("PT24H")
2132
 
    datetime.timedelta(1)
2133
 
    >>> rfc3339_duration_to_delta("P1W")
2134
 
    datetime.timedelta(7)
2135
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2136
 
    datetime.timedelta(0, 330)
2137
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2138
 
    datetime.timedelta(1, 200)
2139
 
    """
2140
 
    
2141
 
    # Parsing an RFC 3339 duration with regular expressions is not
2142
 
    # possible - there would have to be multiple places for the same
2143
 
    # values, like seconds.  The current code, while more esoteric, is
2144
 
    # cleaner without depending on a parsing library.  If Python had a
2145
 
    # built-in library for parsing we would use it, but we'd like to
2146
 
    # avoid excessive use of external libraries.
2147
 
    
2148
 
    # New type for defining tokens, syntax, and semantics all-in-one
2149
 
    Token = collections.namedtuple("Token",
2150
 
                                   ("regexp", # To match token; if
2151
 
                                              # "value" is not None,
2152
 
                                              # must have a "group"
2153
 
                                              # containing digits
2154
 
                                    "value",  # datetime.timedelta or
2155
 
                                              # None
2156
 
                                    "followers")) # Tokens valid after
2157
 
                                                  # this token
2158
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2159
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2160
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2161
 
    token_second = Token(re.compile(r"(\d+)S"),
2162
 
                         datetime.timedelta(seconds=1),
2163
 
                         frozenset((token_end,)))
2164
 
    token_minute = Token(re.compile(r"(\d+)M"),
2165
 
                         datetime.timedelta(minutes=1),
2166
 
                         frozenset((token_second, token_end)))
2167
 
    token_hour = Token(re.compile(r"(\d+)H"),
2168
 
                       datetime.timedelta(hours=1),
2169
 
                       frozenset((token_minute, token_end)))
2170
 
    token_time = Token(re.compile(r"T"),
2171
 
                       None,
2172
 
                       frozenset((token_hour, token_minute,
2173
 
                                  token_second)))
2174
 
    token_day = Token(re.compile(r"(\d+)D"),
2175
 
                      datetime.timedelta(days=1),
2176
 
                      frozenset((token_time, token_end)))
2177
 
    token_month = Token(re.compile(r"(\d+)M"),
2178
 
                        datetime.timedelta(weeks=4),
2179
 
                        frozenset((token_day, token_end)))
2180
 
    token_year = Token(re.compile(r"(\d+)Y"),
2181
 
                       datetime.timedelta(weeks=52),
2182
 
                       frozenset((token_month, token_end)))
2183
 
    token_week = Token(re.compile(r"(\d+)W"),
2184
 
                       datetime.timedelta(weeks=1),
2185
 
                       frozenset((token_end,)))
2186
 
    token_duration = Token(re.compile(r"P"), None,
2187
 
                           frozenset((token_year, token_month,
2188
 
                                      token_day, token_time,
2189
 
                                      token_week))),
2190
 
    # Define starting values
2191
 
    value = datetime.timedelta() # Value so far
2192
 
    found_token = None
2193
 
    followers = frozenset(token_duration,) # Following valid tokens
2194
 
    s = duration                # String left to parse
2195
 
    # Loop until end token is found
2196
 
    while found_token is not token_end:
2197
 
        # Search for any currently valid tokens
2198
 
        for token in followers:
2199
 
            match = token.regexp.match(s)
2200
 
            if match is not None:
2201
 
                # Token found
2202
 
                if token.value is not None:
2203
 
                    # Value found, parse digits
2204
 
                    factor = int(match.group(1), 10)
2205
 
                    # Add to value so far
2206
 
                    value += factor * token.value
2207
 
                # Strip token from string
2208
 
                s = token.regexp.sub("", s, 1)
2209
 
                # Go to found token
2210
 
                found_token = token
2211
 
                # Set valid next tokens
2212
 
                followers = found_token.followers
2213
 
                break
2214
 
        else:
2215
 
            # No currently valid tokens were found
2216
 
            raise ValueError("Invalid RFC 3339 duration")
2217
 
    # End token found
2218
 
    return value
 
408
            return super(type(self), self).server_bind()
2219
409
 
2220
410
 
2221
411
def string_to_delta(interval):
2222
412
    """Parse a string and return a datetime.timedelta
2223
 
    
 
413
 
2224
414
    >>> string_to_delta('7d')
2225
415
    datetime.timedelta(7)
2226
416
    >>> string_to_delta('60s')
2229
419
    datetime.timedelta(0, 3600)
2230
420
    >>> string_to_delta('24h')
2231
421
    datetime.timedelta(1)
2232
 
    >>> string_to_delta('1w')
 
422
    >>> string_to_delta(u'1w')
2233
423
    datetime.timedelta(7)
2234
 
    >>> string_to_delta('5m 30s')
2235
 
    datetime.timedelta(0, 330)
2236
424
    """
2237
 
    
2238
 
    try:
2239
 
        return rfc3339_duration_to_delta(interval)
2240
 
    except ValueError:
2241
 
        pass
2242
 
    
2243
 
    timevalue = datetime.timedelta(0)
2244
 
    for s in interval.split():
2245
 
        try:
2246
 
            suffix = unicode(s[-1])
2247
 
            value = int(s[:-1])
2248
 
            if suffix == "d":
2249
 
                delta = datetime.timedelta(value)
2250
 
            elif suffix == "s":
2251
 
                delta = datetime.timedelta(0, value)
2252
 
            elif suffix == "m":
2253
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2254
 
            elif suffix == "h":
2255
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2256
 
            elif suffix == "w":
2257
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2258
 
            else:
2259
 
                raise ValueError("Unknown suffix {0!r}"
2260
 
                                 .format(suffix))
2261
 
        except (ValueError, IndexError) as e:
2262
 
            raise ValueError(*(e.args))
2263
 
        timevalue += delta
2264
 
    return timevalue
2265
 
 
2266
 
 
2267
 
def daemon(nochdir = False, noclose = False):
2268
 
    """See daemon(3).  Standard BSD Unix function.
2269
 
    
2270
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2271
 
    if os.fork():
2272
 
        sys.exit()
2273
 
    os.setsid()
2274
 
    if not nochdir:
2275
 
        os.chdir("/")
2276
 
    if os.fork():
2277
 
        sys.exit()
2278
 
    if not noclose:
2279
 
        # Close all standard open file descriptors
2280
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2281
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2282
 
            raise OSError(errno.ENODEV,
2283
 
                          "{0} not a character device"
2284
 
                          .format(os.devnull))
2285
 
        os.dup2(null, sys.stdin.fileno())
2286
 
        os.dup2(null, sys.stdout.fileno())
2287
 
        os.dup2(null, sys.stderr.fileno())
2288
 
        if null > 2:
2289
 
            os.close(null)
2290
 
 
2291
 
 
2292
 
def main():
2293
 
    
2294
 
    ##################################################################
2295
 
    # Parsing of options, both command line and config file
2296
 
    
2297
 
    parser = argparse.ArgumentParser()
2298
 
    parser.add_argument("-v", "--version", action="version",
2299
 
                        version = "%(prog)s {0}".format(version),
2300
 
                        help="show version number and exit")
2301
 
    parser.add_argument("-i", "--interface", metavar="IF",
2302
 
                        help="Bind to interface IF")
2303
 
    parser.add_argument("-a", "--address",
2304
 
                        help="Address to listen for requests on")
2305
 
    parser.add_argument("-p", "--port", type=int,
2306
 
                        help="Port number to receive requests on")
2307
 
    parser.add_argument("--check", action="store_true",
2308
 
                        help="Run self-test")
2309
 
    parser.add_argument("--debug", action="store_true",
2310
 
                        help="Debug mode; run in foreground and log"
2311
 
                        " to terminal", default=None)
2312
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2313
 
                        help="Debug level for stdout output")
2314
 
    parser.add_argument("--priority", help="GnuTLS"
2315
 
                        " priority string (see GnuTLS documentation)")
2316
 
    parser.add_argument("--servicename",
2317
 
                        metavar="NAME", help="Zeroconf service name")
2318
 
    parser.add_argument("--configdir",
2319
 
                        default="/etc/mandos", metavar="DIR",
2320
 
                        help="Directory to search for configuration"
2321
 
                        " files")
2322
 
    parser.add_argument("--no-dbus", action="store_false",
2323
 
                        dest="use_dbus", help="Do not provide D-Bus"
2324
 
                        " system bus interface", default=None)
2325
 
    parser.add_argument("--no-ipv6", action="store_false",
2326
 
                        dest="use_ipv6", help="Do not use IPv6",
2327
 
                        default=None)
2328
 
    parser.add_argument("--no-restore", action="store_false",
2329
 
                        dest="restore", help="Do not restore stored"
2330
 
                        " state", default=None)
2331
 
    parser.add_argument("--socket", type=int,
2332
 
                        help="Specify a file descriptor to a network"
2333
 
                        " socket to use instead of creating one")
2334
 
    parser.add_argument("--statedir", metavar="DIR",
2335
 
                        help="Directory to save/restore state in")
2336
 
    parser.add_argument("--foreground", action="store_true",
2337
 
                        help="Run in foreground", default=None)
2338
 
    
2339
 
    options = parser.parse_args()
 
425
    try:
 
426
        suffix=unicode(interval[-1])
 
427
        value=int(interval[:-1])
 
428
        if suffix == u"d":
 
429
            delta = datetime.timedelta(value)
 
430
        elif suffix == u"s":
 
431
            delta = datetime.timedelta(0, value)
 
432
        elif suffix == u"m":
 
433
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
434
        elif suffix == u"h":
 
435
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
436
        elif suffix == u"w":
 
437
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
438
        else:
 
439
            raise ValueError
 
440
    except (ValueError, IndexError):
 
441
        raise ValueError
 
442
    return delta
 
443
 
 
444
 
 
445
def add_service():
 
446
    """From the Avahi server example code"""
 
447
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
448
           domain, host
 
449
    if group is None:
 
450
        group = dbus.Interface(
 
451
                bus.get_object( avahi.DBUS_NAME,
 
452
                                server.EntryGroupNew()),
 
453
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
454
        group.connect_to_signal('StateChanged',
 
455
                                entry_group_state_changed)
 
456
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
457
                 serviceName, serviceType)
 
458
    
 
459
    group.AddService(
 
460
            serviceInterface,           # interface
 
461
            avahi.PROTO_INET6,          # protocol
 
462
            dbus.UInt32(0),             # flags
 
463
            serviceName, serviceType,
 
464
            domain, host,
 
465
            dbus.UInt16(servicePort),
 
466
            avahi.string_array_to_txt_array(serviceTXT))
 
467
    group.Commit()
 
468
 
 
469
 
 
470
def remove_service():
 
471
    """From the Avahi server example code"""
 
472
    global group
 
473
    
 
474
    if not group is None:
 
475
        group.Reset()
 
476
 
 
477
 
 
478
def server_state_changed(state):
 
479
    """From the Avahi server example code"""
 
480
    if state == avahi.SERVER_COLLISION:
 
481
        logger.warning(u"Server name collision")
 
482
        remove_service()
 
483
    elif state == avahi.SERVER_RUNNING:
 
484
        add_service()
 
485
 
 
486
 
 
487
def entry_group_state_changed(state, error):
 
488
    """From the Avahi server example code"""
 
489
    global serviceName, server, rename_count
 
490
    
 
491
    logger.debug(u"state change: %i", state)
 
492
    
 
493
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
494
        logger.debug(u"Service established.")
 
495
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
496
        
 
497
        rename_count = rename_count - 1
 
498
        if rename_count > 0:
 
499
            name = server.GetAlternativeServiceName(name)
 
500
            logger.warning(u"Service name collision, "
 
501
                           u"changing name to '%s' ...", name)
 
502
            remove_service()
 
503
            add_service()
 
504
            
 
505
        else:
 
506
            logger.error(u"No suitable service name found "
 
507
                         u"after %i retries, exiting.",
 
508
                         n_rename)
 
509
            main_loop.quit()
 
510
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
511
        logger.error(u"Error in group state changed %s",
 
512
                     unicode(error))
 
513
        main_loop.quit()
 
514
        return
 
515
 
 
516
 
 
517
def if_nametoindex(interface):
 
518
    """Call the C function if_nametoindex()"""
 
519
    try:
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
 
522
    except (OSError, AttributeError):
 
523
        if "struct" not in sys.modules:
 
524
            import struct
 
525
        if "fcntl" not in sys.modules:
 
526
            import fcntl
 
527
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
528
        s = socket.socket()
 
529
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
530
                            struct.pack("16s16x", interface))
 
531
        s.close()
 
532
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
533
        return interface_index
 
534
 
 
535
 
 
536
if __name__ == '__main__':
 
537
    parser = OptionParser()
 
538
    parser.add_option("-i", "--interface", type="string",
 
539
                      default=None, metavar="IF",
 
540
                      help="Bind to interface IF")
 
541
    parser.add_option("--cert", type="string", default="cert.pem",
 
542
                      metavar="FILE",
 
543
                      help="Public key certificate PEM file to use")
 
544
    parser.add_option("--key", type="string", default="key.pem",
 
545
                      metavar="FILE",
 
546
                      help="Private key PEM file to use")
 
547
    parser.add_option("--ca", type="string", default="ca.pem",
 
548
                      metavar="FILE",
 
549
                      help="Certificate Authority certificate PEM file to use")
 
550
    parser.add_option("--crl", type="string", default="crl.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Revokation List PEM file to use")
 
553
    parser.add_option("-p", "--port", type="int", default=None,
 
554
                      help="Port number to receive requests on")
 
555
    parser.add_option("--timeout", type="string", # Parsed later
 
556
                      default="1h",
 
557
                      help="Amount of downtime allowed for clients")
 
558
    parser.add_option("--interval", type="string", # Parsed later
 
559
                      default="5m",
 
560
                      help="How often to check that a client is up")
 
561
    parser.add_option("--check", action="store_true", default=False,
 
562
                      help="Run self-test")
 
563
    parser.add_option("--debug", action="store_true", default=False,
 
564
                      help="Debug mode")
 
565
    (options, args) = parser.parse_args()
2340
566
    
2341
567
    if options.check:
2342
568
        import doctest
2343
569
        doctest.testmod()
2344
570
        sys.exit()
2345
571
    
2346
 
    # Default values for config file for server-global settings
2347
 
    server_defaults = { "interface": "",
2348
 
                        "address": "",
2349
 
                        "port": "",
2350
 
                        "debug": "False",
2351
 
                        "priority":
2352
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2353
 
                        "servicename": "Mandos",
2354
 
                        "use_dbus": "True",
2355
 
                        "use_ipv6": "True",
2356
 
                        "debuglevel": "",
2357
 
                        "restore": "True",
2358
 
                        "socket": "",
2359
 
                        "statedir": "/var/lib/mandos",
2360
 
                        "foreground": "False",
2361
 
                        }
2362
 
    
2363
 
    # Parse config file for server-global settings
2364
 
    server_config = configparser.SafeConfigParser(server_defaults)
2365
 
    del server_defaults
2366
 
    server_config.read(os.path.join(options.configdir,
2367
 
                                    "mandos.conf"))
2368
 
    # Convert the SafeConfigParser object to a dict
2369
 
    server_settings = server_config.defaults()
2370
 
    # Use the appropriate methods on the non-string config options
2371
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2372
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2373
 
                                                           option)
2374
 
    if server_settings["port"]:
2375
 
        server_settings["port"] = server_config.getint("DEFAULT",
2376
 
                                                       "port")
2377
 
    if server_settings["socket"]:
2378
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2379
 
                                                         "socket")
2380
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2381
 
        # over with an opened os.devnull.  But we don't want this to
2382
 
        # happen with a supplied network socket.
2383
 
        if 0 <= server_settings["socket"] <= 2:
2384
 
            server_settings["socket"] = os.dup(server_settings
2385
 
                                               ["socket"])
2386
 
    del server_config
2387
 
    
2388
 
    # Override the settings from the config file with command line
2389
 
    # options, if set.
2390
 
    for option in ("interface", "address", "port", "debug",
2391
 
                   "priority", "servicename", "configdir",
2392
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2393
 
                   "statedir", "socket", "foreground"):
2394
 
        value = getattr(options, option)
2395
 
        if value is not None:
2396
 
            server_settings[option] = value
2397
 
    del options
2398
 
    # Force all strings to be unicode
2399
 
    for option in server_settings.keys():
2400
 
        if type(server_settings[option]) is str:
2401
 
            server_settings[option] = unicode(server_settings[option])
2402
 
    # Force all boolean options to be boolean
2403
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2404
 
                   "foreground"):
2405
 
        server_settings[option] = bool(server_settings[option])
2406
 
    # Debug implies foreground
2407
 
    if server_settings["debug"]:
2408
 
        server_settings["foreground"] = True
2409
 
    # Now we have our good server settings in "server_settings"
2410
 
    
2411
 
    ##################################################################
2412
 
    
2413
 
    # For convenience
2414
 
    debug = server_settings["debug"]
2415
 
    debuglevel = server_settings["debuglevel"]
2416
 
    use_dbus = server_settings["use_dbus"]
2417
 
    use_ipv6 = server_settings["use_ipv6"]
2418
 
    stored_state_path = os.path.join(server_settings["statedir"],
2419
 
                                     stored_state_file)
2420
 
    foreground = server_settings["foreground"]
2421
 
    
2422
 
    if debug:
2423
 
        initlogger(debug, logging.DEBUG)
2424
 
    else:
2425
 
        if not debuglevel:
2426
 
            initlogger(debug)
2427
 
        else:
2428
 
            level = getattr(logging, debuglevel.upper())
2429
 
            initlogger(debug, level)
2430
 
    
2431
 
    if server_settings["servicename"] != "Mandos":
2432
 
        syslogger.setFormatter(logging.Formatter
2433
 
                               ('Mandos ({0}) [%(process)d]:'
2434
 
                                ' %(levelname)s: %(message)s'
2435
 
                                .format(server_settings
2436
 
                                        ["servicename"])))
2437
 
    
2438
 
    # Parse config file with clients
2439
 
    client_config = configparser.SafeConfigParser(Client
2440
 
                                                  .client_defaults)
2441
 
    client_config.read(os.path.join(server_settings["configdir"],
2442
 
                                    "clients.conf"))
2443
 
    
2444
 
    global mandos_dbus_service
2445
 
    mandos_dbus_service = None
2446
 
    
2447
 
    tcp_server = MandosServer((server_settings["address"],
2448
 
                               server_settings["port"]),
2449
 
                              ClientHandler,
2450
 
                              interface=(server_settings["interface"]
2451
 
                                         or None),
2452
 
                              use_ipv6=use_ipv6,
2453
 
                              gnutls_priority=
2454
 
                              server_settings["priority"],
2455
 
                              use_dbus=use_dbus,
2456
 
                              socketfd=(server_settings["socket"]
2457
 
                                        or None))
2458
 
    if not foreground:
2459
 
        pidfilename = "/run/mandos.pid"
2460
 
        pidfile = None
2461
 
        try:
2462
 
            pidfile = open(pidfilename, "w")
2463
 
        except IOError as e:
2464
 
            logger.error("Could not open file %r", pidfilename,
2465
 
                         exc_info=e)
2466
 
    
2467
 
    for name in ("_mandos", "mandos", "nobody"):
2468
 
        try:
2469
 
            uid = pwd.getpwnam(name).pw_uid
2470
 
            gid = pwd.getpwnam(name).pw_gid
2471
 
            break
2472
 
        except KeyError:
2473
 
            continue
2474
 
    else:
2475
 
        uid = 65534
2476
 
        gid = 65534
2477
 
    try:
2478
 
        os.setgid(gid)
2479
 
        os.setuid(uid)
2480
 
    except OSError as error:
2481
 
        if error.errno != errno.EPERM:
2482
 
            raise error
2483
 
    
2484
 
    if debug:
2485
 
        # Enable all possible GnuTLS debugging
2486
 
        
2487
 
        # "Use a log level over 10 to enable all debugging options."
2488
 
        # - GnuTLS manual
2489
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2490
 
        
2491
 
        @gnutls.library.types.gnutls_log_func
2492
 
        def debug_gnutls(level, string):
2493
 
            logger.debug("GnuTLS: %s", string[:-1])
2494
 
        
2495
 
        (gnutls.library.functions
2496
 
         .gnutls_global_set_log_function(debug_gnutls))
2497
 
        
2498
 
        # Redirect stdin so all checkers get /dev/null
2499
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2500
 
        os.dup2(null, sys.stdin.fileno())
2501
 
        if null > 2:
2502
 
            os.close(null)
2503
 
    
2504
 
    # Need to fork before connecting to D-Bus
2505
 
    if not foreground:
2506
 
        # Close all input and output, do double fork, etc.
2507
 
        daemon()
2508
 
    
2509
 
    # multiprocessing will use threads, so before we use gobject we
2510
 
    # need to inform gobject that threads will be used.
2511
 
    gobject.threads_init()
2512
 
    
2513
 
    global main_loop
2514
 
    # From the Avahi example code
2515
 
    DBusGMainLoop(set_as_default=True)
 
572
    # Parse the time arguments
 
573
    try:
 
574
        options.timeout = string_to_delta(options.timeout)
 
575
    except ValueError:
 
576
        parser.error("option --timeout: Unparseable time")
 
577
    try:
 
578
        options.interval = string_to_delta(options.interval)
 
579
    except ValueError:
 
580
        parser.error("option --interval: Unparseable time")
 
581
    
 
582
    # Parse config file
 
583
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
584
    client_config = ConfigParser.SafeConfigParser(defaults)
 
585
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
586
    client_config.read("mandos-clients.conf")
 
587
    
 
588
    # From the Avahi server example code
 
589
    DBusGMainLoop(set_as_default=True )
2516
590
    main_loop = gobject.MainLoop()
2517
591
    bus = dbus.SystemBus()
2518
 
    # End of Avahi example code
2519
 
    if use_dbus:
2520
 
        try:
2521
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2522
 
                                            bus, do_not_queue=True)
2523
 
            old_bus_name = (dbus.service.BusName
2524
 
                            ("se.bsnet.fukt.Mandos", bus,
2525
 
                             do_not_queue=True))
2526
 
        except dbus.exceptions.NameExistsException as e:
2527
 
            logger.error("Disabling D-Bus:", exc_info=e)
2528
 
            use_dbus = False
2529
 
            server_settings["use_dbus"] = False
2530
 
            tcp_server.use_dbus = False
2531
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2532
 
    service = AvahiServiceToSyslog(name =
2533
 
                                   server_settings["servicename"],
2534
 
                                   servicetype = "_mandos._tcp",
2535
 
                                   protocol = protocol, bus = bus)
2536
 
    if server_settings["interface"]:
2537
 
        service.interface = (if_nametoindex
2538
 
                             (str(server_settings["interface"])))
2539
 
    
2540
 
    global multiprocessing_manager
2541
 
    multiprocessing_manager = multiprocessing.Manager()
2542
 
    
2543
 
    client_class = Client
2544
 
    if use_dbus:
2545
 
        client_class = functools.partial(ClientDBus, bus = bus)
2546
 
    
2547
 
    client_settings = Client.config_parser(client_config)
2548
 
    old_client_settings = {}
2549
 
    clients_data = {}
2550
 
    
2551
 
    # This is used to redirect stdout and stderr for checker processes
2552
 
    global wnull
2553
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2554
 
    # Only used if server is running in foreground but not in debug
2555
 
    # mode
2556
 
    if debug or not foreground:
2557
 
        wnull.close()
2558
 
    
2559
 
    # Get client data and settings from last running state.
2560
 
    if server_settings["restore"]:
2561
 
        try:
2562
 
            with open(stored_state_path, "rb") as stored_state:
2563
 
                clients_data, old_client_settings = (pickle.load
2564
 
                                                     (stored_state))
2565
 
            os.remove(stored_state_path)
2566
 
        except IOError as e:
2567
 
            if e.errno == errno.ENOENT:
2568
 
                logger.warning("Could not load persistent state: {0}"
2569
 
                                .format(os.strerror(e.errno)))
2570
 
            else:
2571
 
                logger.critical("Could not load persistent state:",
2572
 
                                exc_info=e)
2573
 
                raise
2574
 
        except EOFError as e:
2575
 
            logger.warning("Could not load persistent state: "
2576
 
                           "EOFError:", exc_info=e)
2577
 
    
2578
 
    with PGPEngine() as pgp:
2579
 
        for client_name, client in clients_data.iteritems():
2580
 
            # Skip removed clients
2581
 
            if client_name not in client_settings:
2582
 
                continue
2583
 
            
2584
 
            # Decide which value to use after restoring saved state.
2585
 
            # We have three different values: Old config file,
2586
 
            # new config file, and saved state.
2587
 
            # New config value takes precedence if it differs from old
2588
 
            # config value, otherwise use saved state.
2589
 
            for name, value in client_settings[client_name].items():
2590
 
                try:
2591
 
                    # For each value in new config, check if it
2592
 
                    # differs from the old config value (Except for
2593
 
                    # the "secret" attribute)
2594
 
                    if (name != "secret" and
2595
 
                        value != old_client_settings[client_name]
2596
 
                        [name]):
2597
 
                        client[name] = value
2598
 
                except KeyError:
2599
 
                    pass
2600
 
            
2601
 
            # Clients who has passed its expire date can still be
2602
 
            # enabled if its last checker was successful.  Clients
2603
 
            # whose checker succeeded before we stored its state is
2604
 
            # assumed to have successfully run all checkers during
2605
 
            # downtime.
2606
 
            if client["enabled"]:
2607
 
                if datetime.datetime.utcnow() >= client["expires"]:
2608
 
                    if not client["last_checked_ok"]:
2609
 
                        logger.warning(
2610
 
                            "disabling client {0} - Client never "
2611
 
                            "performed a successful checker"
2612
 
                            .format(client_name))
2613
 
                        client["enabled"] = False
2614
 
                    elif client["last_checker_status"] != 0:
2615
 
                        logger.warning(
2616
 
                            "disabling client {0} - Client "
2617
 
                            "last checker failed with error code {1}"
2618
 
                            .format(client_name,
2619
 
                                    client["last_checker_status"]))
2620
 
                        client["enabled"] = False
2621
 
                    else:
2622
 
                        client["expires"] = (datetime.datetime
2623
 
                                             .utcnow()
2624
 
                                             + client["timeout"])
2625
 
                        logger.debug("Last checker succeeded,"
2626
 
                                     " keeping {0} enabled"
2627
 
                                     .format(client_name))
2628
 
            try:
2629
 
                client["secret"] = (
2630
 
                    pgp.decrypt(client["encrypted_secret"],
2631
 
                                client_settings[client_name]
2632
 
                                ["secret"]))
2633
 
            except PGPError:
2634
 
                # If decryption fails, we use secret from new settings
2635
 
                logger.debug("Failed to decrypt {0} old secret"
2636
 
                             .format(client_name))
2637
 
                client["secret"] = (
2638
 
                    client_settings[client_name]["secret"])
2639
 
    
2640
 
    # Add/remove clients based on new changes made to config
2641
 
    for client_name in (set(old_client_settings)
2642
 
                        - set(client_settings)):
2643
 
        del clients_data[client_name]
2644
 
    for client_name in (set(client_settings)
2645
 
                        - set(old_client_settings)):
2646
 
        clients_data[client_name] = client_settings[client_name]
2647
 
    
2648
 
    # Create all client objects
2649
 
    for client_name, client in clients_data.iteritems():
2650
 
        tcp_server.clients[client_name] = client_class(
2651
 
            name = client_name, settings = client,
2652
 
            server_settings = server_settings)
2653
 
    
2654
 
    if not tcp_server.clients:
2655
 
        logger.warning("No clients defined")
2656
 
    
2657
 
    if not foreground:
2658
 
        if pidfile is not None:
2659
 
            try:
2660
 
                with pidfile:
2661
 
                    pid = os.getpid()
2662
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
2663
 
            except IOError:
2664
 
                logger.error("Could not write to file %r with PID %d",
2665
 
                             pidfilename, pid)
2666
 
        del pidfile
2667
 
        del pidfilename
2668
 
    
2669
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2670
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2671
 
    
2672
 
    if use_dbus:
2673
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2674
 
                                        "se.bsnet.fukt.Mandos"})
2675
 
        class MandosDBusService(DBusObjectWithProperties):
2676
 
            """A D-Bus proxy object"""
2677
 
            def __init__(self):
2678
 
                dbus.service.Object.__init__(self, bus, "/")
2679
 
            _interface = "se.recompile.Mandos"
2680
 
            
2681
 
            @dbus_interface_annotations(_interface)
2682
 
            def _foo(self):
2683
 
                return { "org.freedesktop.DBus.Property"
2684
 
                         ".EmitsChangedSignal":
2685
 
                             "false"}
2686
 
            
2687
 
            @dbus.service.signal(_interface, signature="o")
2688
 
            def ClientAdded(self, objpath):
2689
 
                "D-Bus signal"
2690
 
                pass
2691
 
            
2692
 
            @dbus.service.signal(_interface, signature="ss")
2693
 
            def ClientNotFound(self, fingerprint, address):
2694
 
                "D-Bus signal"
2695
 
                pass
2696
 
            
2697
 
            @dbus.service.signal(_interface, signature="os")
2698
 
            def ClientRemoved(self, objpath, name):
2699
 
                "D-Bus signal"
2700
 
                pass
2701
 
            
2702
 
            @dbus.service.method(_interface, out_signature="ao")
2703
 
            def GetAllClients(self):
2704
 
                "D-Bus method"
2705
 
                return dbus.Array(c.dbus_object_path
2706
 
                                  for c in
2707
 
                                  tcp_server.clients.itervalues())
2708
 
            
2709
 
            @dbus.service.method(_interface,
2710
 
                                 out_signature="a{oa{sv}}")
2711
 
            def GetAllClientsWithProperties(self):
2712
 
                "D-Bus method"
2713
 
                return dbus.Dictionary(
2714
 
                    ((c.dbus_object_path, c.GetAll(""))
2715
 
                     for c in tcp_server.clients.itervalues()),
2716
 
                    signature="oa{sv}")
2717
 
            
2718
 
            @dbus.service.method(_interface, in_signature="o")
2719
 
            def RemoveClient(self, object_path):
2720
 
                "D-Bus method"
2721
 
                for c in tcp_server.clients.itervalues():
2722
 
                    if c.dbus_object_path == object_path:
2723
 
                        del tcp_server.clients[c.name]
2724
 
                        c.remove_from_connection()
2725
 
                        # Don't signal anything except ClientRemoved
2726
 
                        c.disable(quiet=True)
2727
 
                        # Emit D-Bus signal
2728
 
                        self.ClientRemoved(object_path, c.name)
2729
 
                        return
2730
 
                raise KeyError(object_path)
2731
 
            
2732
 
            del _interface
2733
 
        
2734
 
        mandos_dbus_service = MandosDBusService()
2735
 
    
2736
 
    def cleanup():
2737
 
        "Cleanup function; run on exit"
2738
 
        service.cleanup()
2739
 
        
2740
 
        multiprocessing.active_children()
2741
 
        wnull.close()
2742
 
        if not (tcp_server.clients or client_settings):
2743
 
            return
2744
 
        
2745
 
        # Store client before exiting. Secrets are encrypted with key
2746
 
        # based on what config file has. If config file is
2747
 
        # removed/edited, old secret will thus be unrecovable.
2748
 
        clients = {}
2749
 
        with PGPEngine() as pgp:
2750
 
            for client in tcp_server.clients.itervalues():
2751
 
                key = client_settings[client.name]["secret"]
2752
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2753
 
                                                      key)
2754
 
                client_dict = {}
2755
 
                
2756
 
                # A list of attributes that can not be pickled
2757
 
                # + secret.
2758
 
                exclude = set(("bus", "changedstate", "secret",
2759
 
                               "checker", "server_settings"))
2760
 
                for name, typ in (inspect.getmembers
2761
 
                                  (dbus.service.Object)):
2762
 
                    exclude.add(name)
2763
 
                
2764
 
                client_dict["encrypted_secret"] = (client
2765
 
                                                   .encrypted_secret)
2766
 
                for attr in client.client_structure:
2767
 
                    if attr not in exclude:
2768
 
                        client_dict[attr] = getattr(client, attr)
2769
 
                
2770
 
                clients[client.name] = client_dict
2771
 
                del client_settings[client.name]["secret"]
2772
 
        
2773
 
        try:
2774
 
            with (tempfile.NamedTemporaryFile
2775
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2776
 
                   dir=os.path.dirname(stored_state_path),
2777
 
                   delete=False)) as stored_state:
2778
 
                pickle.dump((clients, client_settings), stored_state)
2779
 
                tempname=stored_state.name
2780
 
            os.rename(tempname, stored_state_path)
2781
 
        except (IOError, OSError) as e:
2782
 
            if not debug:
2783
 
                try:
2784
 
                    os.remove(tempname)
2785
 
                except NameError:
2786
 
                    pass
2787
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2788
 
                logger.warning("Could not save persistent state: {0}"
2789
 
                               .format(os.strerror(e.errno)))
2790
 
            else:
2791
 
                logger.warning("Could not save persistent state:",
2792
 
                               exc_info=e)
2793
 
                raise e
2794
 
        
2795
 
        # Delete all clients, and settings from config
2796
 
        while tcp_server.clients:
2797
 
            name, client = tcp_server.clients.popitem()
2798
 
            if use_dbus:
2799
 
                client.remove_from_connection()
2800
 
            # Don't signal anything except ClientRemoved
2801
 
            client.disable(quiet=True)
2802
 
            if use_dbus:
2803
 
                # Emit D-Bus signal
2804
 
                mandos_dbus_service.ClientRemoved(client
2805
 
                                                  .dbus_object_path,
2806
 
                                                  client.name)
2807
 
        client_settings.clear()
2808
 
    
2809
 
    atexit.register(cleanup)
2810
 
    
2811
 
    for client in tcp_server.clients.itervalues():
2812
 
        if use_dbus:
2813
 
            # Emit D-Bus signal
2814
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2815
 
        # Need to initiate checking of clients
2816
 
        if client.enabled:
2817
 
            client.init_checker()
2818
 
    
2819
 
    tcp_server.enable()
2820
 
    tcp_server.server_activate()
2821
 
    
2822
 
    # Find out what port we got
2823
 
    service.port = tcp_server.socket.getsockname()[1]
2824
 
    if use_ipv6:
2825
 
        logger.info("Now listening on address %r, port %d,"
2826
 
                    " flowinfo %d, scope_id %d",
2827
 
                    *tcp_server.socket.getsockname())
2828
 
    else:                       # IPv4
2829
 
        logger.info("Now listening on address %r, port %d",
2830
 
                    *tcp_server.socket.getsockname())
2831
 
    
2832
 
    #service.interface = tcp_server.socket.getsockname()[3]
2833
 
    
 
592
    server = dbus.Interface(
 
593
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
594
            avahi.DBUS_INTERFACE_SERVER )
 
595
    # End of Avahi example code
 
596
    
 
597
    debug = options.debug
 
598
    
 
599
    clients = Set()
 
600
    def remove_from_clients(client):
 
601
        clients.remove(client)
 
602
        if not clients:
 
603
            logger.debug(u"No clients left, exiting")
 
604
            main_loop.quit()
 
605
    
 
606
    clients.update(Set(Client(name=section, options=options,
 
607
                              stop_hook = remove_from_clients,
 
608
                              **(dict(client_config\
 
609
                                      .items(section))))
 
610
                       for section in client_config.sections()))
 
611
    for client in clients:
 
612
        client.start()
 
613
    
 
614
    tcp_server = IPv6_TCPServer((None, options.port),
 
615
                                tcp_handler,
 
616
                                options=options,
 
617
                                clients=clients)
 
618
    # Find out what random port we got
 
619
    servicePort = tcp_server.socket.getsockname()[1]
 
620
    logger.debug(u"Now listening on port %d", servicePort)
 
621
    
 
622
    if options.interface is not None:
 
623
        serviceInterface = if_nametoindex(options.interface)
 
624
    
 
625
    # From the Avahi server example code
 
626
    server.connect_to_signal("StateChanged", server_state_changed)
 
627
    server_state_changed(server.GetState())
 
628
    # End of Avahi example code
 
629
    
 
630
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
631
                         lambda *args, **kwargs:
 
632
                         tcp_server.handle_request(*args[2:],
 
633
                                                   **kwargs) or True)
2834
634
    try:
2835
 
        # From the Avahi example code
2836
 
        try:
2837
 
            service.activate()
2838
 
        except dbus.exceptions.DBusException as error:
2839
 
            logger.critical("D-Bus Exception", exc_info=error)
2840
 
            cleanup()
2841
 
            sys.exit(1)
2842
 
        # End of Avahi example code
2843
 
        
2844
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2845
 
                             lambda *args, **kwargs:
2846
 
                             (tcp_server.handle_request
2847
 
                              (*args[2:], **kwargs) or True))
2848
 
        
2849
 
        logger.debug("Starting main loop")
2850
635
        main_loop.run()
2851
 
    except AvahiError as error:
2852
 
        logger.critical("Avahi Error", exc_info=error)
2853
 
        cleanup()
2854
 
        sys.exit(1)
2855
636
    except KeyboardInterrupt:
2856
 
        if debug:
2857
 
            print("", file=sys.stderr)
2858
 
        logger.debug("Server received KeyboardInterrupt")
2859
 
    logger.debug("Server exiting")
2860
 
    # Must run before the D-Bus bus name gets deregistered
2861
 
    cleanup()
 
637
        print
 
638
    
 
639
    # Cleanup here
2862
640
 
2863
 
if __name__ == '__main__':
2864
 
    main()
 
641
    # From the Avahi server example code
 
642
    if not group is None:
 
643
        group.Free()
 
644
    # End of Avahi example code
 
645
    
 
646
    for client in clients:
 
647
        client.stop_hook = None
 
648
        client.stop()