/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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Lines of Context:
1
 
#!/usr/bin/python2.7
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 © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 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
 
1
#!/usr/bin/python
 
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
 
if sys.version_info.major == 2:
92
 
    str = unicode
93
 
 
94
 
version = "1.6.9"
95
 
stored_state_file = "clients.pickle"
96
 
 
97
 
logger = logging.getLogger()
98
 
syslogger = None
99
 
 
100
 
try:
101
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
102
 
                      (ctypes.util.find_library("c"))
103
 
                      .if_nametoindex)
104
 
except (OSError, AttributeError):
105
 
    def if_nametoindex(interface):
106
 
        "Get an interface index the hard way, i.e. using fcntl()"
107
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
108
 
        with contextlib.closing(socket.socket()) as s:
109
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
 
                                struct.pack(b"16s16x", interface))
111
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
112
 
        return interface_index
113
 
 
114
 
 
115
 
def initlogger(debug, level=logging.WARNING):
116
 
    """init logger and add loglevel"""
117
 
    
118
 
    global syslogger
119
 
    syslogger = (logging.handlers.SysLogHandler
120
 
                 (facility =
121
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
122
 
                  address = "/dev/log"))
123
 
    syslogger.setFormatter(logging.Formatter
124
 
                           ('Mandos [%(process)d]: %(levelname)s:'
125
 
                            ' %(message)s'))
126
 
    logger.addHandler(syslogger)
127
 
    
128
 
    if debug:
129
 
        console = logging.StreamHandler()
130
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
 
                                               ' [%(process)d]:'
132
 
                                               ' %(levelname)s:'
133
 
                                               ' %(message)s'))
134
 
        logger.addHandler(console)
135
 
    logger.setLevel(level)
136
 
 
137
 
 
138
 
class PGPError(Exception):
139
 
    """Exception if encryption/decryption fails"""
140
 
    pass
141
 
 
142
 
 
143
 
class PGPEngine(object):
144
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
145
 
    def __init__(self):
146
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
 
        self.gnupgargs = ['--batch',
148
 
                          '--home', self.tempdir,
149
 
                          '--force-mdc',
150
 
                          '--quiet',
151
 
                          '--no-use-agent']
152
 
    
153
 
    def __enter__(self):
154
 
        return self
155
 
    
156
 
    def __exit__(self, exc_type, exc_value, traceback):
157
 
        self._cleanup()
158
 
        return False
159
 
    
160
 
    def __del__(self):
161
 
        self._cleanup()
162
 
    
163
 
    def _cleanup(self):
164
 
        if self.tempdir is not None:
165
 
            # Delete contents of tempdir
166
 
            for root, dirs, files in os.walk(self.tempdir,
167
 
                                             topdown = False):
168
 
                for filename in files:
169
 
                    os.remove(os.path.join(root, filename))
170
 
                for dirname in dirs:
171
 
                    os.rmdir(os.path.join(root, dirname))
172
 
            # Remove tempdir
173
 
            os.rmdir(self.tempdir)
174
 
            self.tempdir = None
175
 
    
176
 
    def password_encode(self, password):
177
 
        # Passphrase can not be empty and can not contain newlines or
178
 
        # NUL bytes.  So we prefix it and hex encode it.
179
 
        encoded = b"mandos" + binascii.hexlify(password)
180
 
        if len(encoded) > 2048:
181
 
            # GnuPG can't handle long passwords, so encode differently
182
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
 
                       .replace(b"\n", b"\\n")
184
 
                       .replace(b"\0", b"\\x00"))
185
 
        return encoded
186
 
    
187
 
    def encrypt(self, data, password):
188
 
        passphrase = self.password_encode(password)
189
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
190
 
                                         ) as passfile:
191
 
            passfile.write(passphrase)
192
 
            passfile.flush()
193
 
            proc = subprocess.Popen(['gpg', '--symmetric',
194
 
                                     '--passphrase-file',
195
 
                                     passfile.name]
196
 
                                    + self.gnupgargs,
197
 
                                    stdin = subprocess.PIPE,
198
 
                                    stdout = subprocess.PIPE,
199
 
                                    stderr = subprocess.PIPE)
200
 
            ciphertext, err = proc.communicate(input = data)
201
 
        if proc.returncode != 0:
202
 
            raise PGPError(err)
203
 
        return ciphertext
204
 
    
205
 
    def decrypt(self, data, password):
206
 
        passphrase = self.password_encode(password)
207
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
208
 
                                         ) as passfile:
209
 
            passfile.write(passphrase)
210
 
            passfile.flush()
211
 
            proc = subprocess.Popen(['gpg', '--decrypt',
212
 
                                     '--passphrase-file',
213
 
                                     passfile.name]
214
 
                                    + self.gnupgargs,
215
 
                                    stdin = subprocess.PIPE,
216
 
                                    stdout = subprocess.PIPE,
217
 
                                    stderr = subprocess.PIPE)
218
 
            decrypted_plaintext, err = proc.communicate(input
219
 
                                                        = data)
220
 
        if proc.returncode != 0:
221
 
            raise PGPError(err)
222
 
        return decrypted_plaintext
223
 
 
224
 
 
225
 
class AvahiError(Exception):
226
 
    def __init__(self, value, *args, **kwargs):
227
 
        self.value = value
228
 
        return super(AvahiError, self).__init__(value, *args,
229
 
                                                **kwargs)
230
 
 
231
 
class AvahiServiceError(AvahiError):
232
 
    pass
233
 
 
234
 
class AvahiGroupError(AvahiError):
235
 
    pass
236
 
 
237
 
 
238
 
class AvahiService(object):
239
 
    """An Avahi (Zeroconf) service.
240
 
    
241
 
    Attributes:
242
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
243
 
               Used to optionally bind to the specified interface.
244
 
    name: string; Example: 'Mandos'
245
 
    type: string; Example: '_mandos._tcp'.
246
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
247
 
    port: integer; what port to announce
248
 
    TXT: list of strings; TXT record for the service
249
 
    domain: string; Domain to publish on, default to .local if empty.
250
 
    host: string; Host to publish records for, default is localhost
251
 
    max_renames: integer; maximum number of renames
252
 
    rename_count: integer; counter so we only rename after collisions
253
 
                  a sensible number of times
254
 
    group: D-Bus Entry Group
255
 
    server: D-Bus Server
256
 
    bus: dbus.SystemBus()
257
 
    """
258
 
    
259
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
 
                 servicetype = None, port = None, TXT = None,
261
 
                 domain = "", host = "", max_renames = 32768,
262
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
263
 
        self.interface = interface
264
 
        self.name = name
265
 
        self.type = servicetype
266
 
        self.port = port
267
 
        self.TXT = TXT if TXT is not None else []
268
 
        self.domain = domain
269
 
        self.host = host
270
 
        self.rename_count = 0
271
 
        self.max_renames = max_renames
272
 
        self.protocol = protocol
273
 
        self.group = None       # our entry group
274
 
        self.server = None
275
 
        self.bus = bus
276
 
        self.entry_group_state_changed_match = None
277
 
    
278
 
    def rename(self, remove=True):
279
 
        """Derived from the Avahi example code"""
280
 
        if self.rename_count >= self.max_renames:
281
 
            logger.critical("No suitable Zeroconf service name found"
282
 
                            " after %i retries, exiting.",
283
 
                            self.rename_count)
284
 
            raise AvahiServiceError("Too many renames")
285
 
        self.name = str(self.server
286
 
                        .GetAlternativeServiceName(self.name))
287
 
        self.rename_count += 1
288
 
        logger.info("Changing Zeroconf service name to %r ...",
289
 
                    self.name)
290
 
        if remove:
291
 
            self.remove()
292
 
        try:
293
 
            self.add()
294
 
        except dbus.exceptions.DBusException as error:
295
 
            if (error.get_dbus_name()
296
 
                == "org.freedesktop.Avahi.CollisionError"):
297
 
                logger.info("Local Zeroconf service name collision.")
298
 
                return self.rename(remove=False)
299
 
            else:
300
 
                logger.critical("D-Bus Exception", exc_info=error)
301
 
                self.cleanup()
302
 
                os._exit(1)
303
 
    
304
 
    def remove(self):
305
 
        """Derived from the Avahi example code"""
306
 
        if self.entry_group_state_changed_match is not None:
307
 
            self.entry_group_state_changed_match.remove()
308
 
            self.entry_group_state_changed_match = None
309
 
        if self.group is not None:
310
 
            self.group.Reset()
311
 
    
312
 
    def add(self):
313
 
        """Derived from the Avahi example code"""
314
 
        self.remove()
315
 
        if self.group is None:
316
 
            self.group = dbus.Interface(
317
 
                self.bus.get_object(avahi.DBUS_NAME,
318
 
                                    self.server.EntryGroupNew()),
319
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
 
        self.entry_group_state_changed_match = (
321
 
            self.group.connect_to_signal(
322
 
                'StateChanged', self.entry_group_state_changed))
323
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
324
 
                     self.name, self.type)
325
 
        self.group.AddService(
326
 
            self.interface,
327
 
            self.protocol,
328
 
            dbus.UInt32(0),     # flags
329
 
            self.name, self.type,
330
 
            self.domain, self.host,
331
 
            dbus.UInt16(self.port),
332
 
            avahi.string_array_to_txt_array(self.TXT))
333
 
        self.group.Commit()
334
 
    
335
 
    def entry_group_state_changed(self, state, error):
336
 
        """Derived from the Avahi example code"""
337
 
        logger.debug("Avahi entry group state change: %i", state)
338
 
        
339
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
340
 
            logger.debug("Zeroconf service established.")
341
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
342
 
            logger.info("Zeroconf service name collision.")
343
 
            self.rename()
344
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
345
 
            logger.critical("Avahi: Error in group state changed %s",
346
 
                            str(error))
347
 
            raise AvahiGroupError("State changed: {!s}"
348
 
                                  .format(error))
349
 
    
350
 
    def cleanup(self):
351
 
        """Derived from the Avahi example code"""
352
 
        if self.group is not None:
353
 
            try:
354
 
                self.group.Free()
355
 
            except (dbus.exceptions.UnknownMethodException,
356
 
                    dbus.exceptions.DBusException):
357
 
                pass
358
 
            self.group = None
359
 
        self.remove()
360
 
    
361
 
    def server_state_changed(self, state, error=None):
362
 
        """Derived from the Avahi example code"""
363
 
        logger.debug("Avahi server state change: %i", state)
364
 
        bad_states = { avahi.SERVER_INVALID:
365
 
                           "Zeroconf server invalid",
366
 
                       avahi.SERVER_REGISTERING: None,
367
 
                       avahi.SERVER_COLLISION:
368
 
                           "Zeroconf server name collision",
369
 
                       avahi.SERVER_FAILURE:
370
 
                           "Zeroconf server failure" }
371
 
        if state in bad_states:
372
 
            if bad_states[state] is not None:
373
 
                if error is None:
374
 
                    logger.error(bad_states[state])
375
 
                else:
376
 
                    logger.error(bad_states[state] + ": %r", error)
377
 
            self.cleanup()
378
 
        elif state == avahi.SERVER_RUNNING:
379
 
            self.add()
380
 
        else:
381
 
            if error is None:
382
 
                logger.debug("Unknown state: %r", state)
383
 
            else:
384
 
                logger.debug("Unknown state: %r: %r", state, error)
385
 
    
386
 
    def activate(self):
387
 
        """Derived from the Avahi example code"""
388
 
        if self.server is None:
389
 
            self.server = dbus.Interface(
390
 
                self.bus.get_object(avahi.DBUS_NAME,
391
 
                                    avahi.DBUS_PATH_SERVER,
392
 
                                    follow_name_owner_changes=True),
393
 
                avahi.DBUS_INTERFACE_SERVER)
394
 
        self.server.connect_to_signal("StateChanged",
395
 
                                 self.server_state_changed)
396
 
        self.server_state_changed(self.server.GetState())
397
 
 
398
 
 
399
 
class AvahiServiceToSyslog(AvahiService):
400
 
    def rename(self, *args, **kwargs):
401
 
        """Add the new name to the syslog messages"""
402
 
        ret = AvahiService.rename(self, *args, **kwargs)
403
 
        syslogger.setFormatter(logging.Formatter
404
 
                               ('Mandos ({}) [%(process)d]:'
405
 
                                ' %(levelname)s: %(message)s'
406
 
                                .format(self.name)))
407
 
        return ret
 
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
408
54
 
409
55
 
410
56
class Client(object):
411
57
    """A representation of a client host served by this server.
412
 
    
413
58
    Attributes:
414
 
    approved:   bool(); 'None' if not yet approved/disapproved
415
 
    approval_delay: datetime.timedelta(); Time to wait for approval
416
 
    approval_duration: datetime.timedelta(); Duration of one approval
417
 
    checker:    subprocess.Popen(); a running checker process used
418
 
                                    to see if the client lives.
419
 
                                    'None' if no process is running.
420
 
    checker_callback_tag: a gobject event source tag, or None
421
 
    checker_command: string; External command which is run to check
422
 
                     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
423
78
                     runtime with vars(self) as dict, so that for
424
79
                     instance %(name)s can be used in the command.
425
 
    checker_initiator_tag: a gobject event source tag, or None
426
 
    created:    datetime.datetime(); (UTC) object creation
427
 
    client_structure: Object describing what attributes a client has
428
 
                      and is used for storing the client at exit
429
 
    current_checker_command: string; current running checker_command
430
 
    disable_initiator_tag: a gobject event source tag, or None
431
 
    enabled:    bool()
432
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
433
 
                 uniquely identify the client
434
 
    host:       string; available for use by the checker command
435
 
    interval:   datetime.timedelta(); How often to start a new checker
436
 
    last_approval_request: datetime.datetime(); (UTC) or None
437
 
    last_checked_ok: datetime.datetime(); (UTC) or None
438
 
    last_checker_status: integer between 0 and 255 reflecting exit
439
 
                         status of last checker. -1 reflects crashed
440
 
                         checker, -2 means no checker completed yet.
441
 
    last_enabled: datetime.datetime(); (UTC) or None
442
 
    name:       string; from the config file, used in log messages and
443
 
                        D-Bus identifiers
444
 
    secret:     bytestring; sent verbatim (over TLS) to client
445
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
446
 
                                      until this client is disabled
447
 
    extended_timeout:   extra long timeout when secret has been sent
448
 
    runtime_expansions: Allowed attributes for runtime expansion.
449
 
    expires:    datetime.datetime(); time (UTC) when a client will be
450
 
                disabled, or None
451
 
    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: - '' -
452
85
    """
453
 
    
454
 
    runtime_expansions = ("approval_delay", "approval_duration",
455
 
                          "created", "enabled", "expires",
456
 
                          "fingerprint", "host", "interval",
457
 
                          "last_approval_request", "last_checked_ok",
458
 
                          "last_enabled", "name", "timeout")
459
 
    client_defaults = { "timeout": "PT5M",
460
 
                        "extended_timeout": "PT15M",
461
 
                        "interval": "PT2M",
462
 
                        "checker": "fping -q -- %%(host)s",
463
 
                        "host": "",
464
 
                        "approval_delay": "PT0S",
465
 
                        "approval_duration": "PT1S",
466
 
                        "approved_by_default": "True",
467
 
                        "enabled": "True",
468
 
                        }
469
 
    
470
 
    @staticmethod
471
 
    def config_parser(config):
472
 
        """Construct a new dict of client settings of this form:
473
 
        { client_name: {setting_name: value, ...}, ...}
474
 
        with exceptions for any special settings as defined above.
475
 
        NOTE: Must be a pure function. Must return the same result
476
 
        value given the same arguments.
477
 
        """
478
 
        settings = {}
479
 
        for client_name in config.sections():
480
 
            section = dict(config.items(client_name))
481
 
            client = settings[client_name] = {}
482
 
            
483
 
            client["host"] = section["host"]
484
 
            # Reformat values from string types to Python types
485
 
            client["approved_by_default"] = config.getboolean(
486
 
                client_name, "approved_by_default")
487
 
            client["enabled"] = config.getboolean(client_name,
488
 
                                                  "enabled")
489
 
            
490
 
            # Uppercase and remove spaces from fingerprint for later
491
 
            # comparison purposes with return value from the
492
 
            # fingerprint() function
493
 
            client["fingerprint"] = (section["fingerprint"].upper()
494
 
                                     .replace(" ", ""))
495
 
            if "secret" in section:
496
 
                client["secret"] = section["secret"].decode("base64")
497
 
            elif "secfile" in section:
498
 
                with open(os.path.expanduser(os.path.expandvars
499
 
                                             (section["secfile"])),
500
 
                          "rb") as secfile:
501
 
                    client["secret"] = secfile.read()
502
 
            else:
503
 
                raise TypeError("No secret or secfile for section {}"
504
 
                                .format(section))
505
 
            client["timeout"] = string_to_delta(section["timeout"])
506
 
            client["extended_timeout"] = string_to_delta(
507
 
                section["extended_timeout"])
508
 
            client["interval"] = string_to_delta(section["interval"])
509
 
            client["approval_delay"] = string_to_delta(
510
 
                section["approval_delay"])
511
 
            client["approval_duration"] = string_to_delta(
512
 
                section["approval_duration"])
513
 
            client["checker_command"] = section["checker"]
514
 
            client["last_approval_request"] = None
515
 
            client["last_checked_ok"] = None
516
 
            client["last_checker_status"] = -2
517
 
        
518
 
        return settings
519
 
    
520
 
    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):
521
112
        self.name = name
522
 
        if server_settings is None:
523
 
            server_settings = {}
524
 
        self.server_settings = server_settings
525
 
        # adding all client settings
526
 
        for setting, value in settings.items():
527
 
            setattr(self, setting, value)
528
 
        
529
 
        if self.enabled:
530
 
            if not hasattr(self, "last_enabled"):
531
 
                self.last_enabled = datetime.datetime.utcnow()
532
 
            if not hasattr(self, "expires"):
533
 
                self.expires = (datetime.datetime.utcnow()
534
 
                                + self.timeout)
535
 
        else:
536
 
            self.last_enabled = None
537
 
            self.expires = None
538
 
        
539
 
        logger.debug("Creating client %r", self.name)
540
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
541
 
        self.created = settings.get("created",
542
 
                                    datetime.datetime.utcnow())
543
 
        
544
 
        # 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
545
138
        self.checker = None
546
139
        self.checker_initiator_tag = None
547
 
        self.disable_initiator_tag = None
 
140
        self.stop_initiator_tag = None
548
141
        self.checker_callback_tag = None
549
 
        self.current_checker_command = None
550
 
        self.approved = None
551
 
        self.approvals_pending = 0
552
 
        self.changedstate = (multiprocessing_manager
553
 
                             .Condition(multiprocessing_manager
554
 
                                        .Lock()))
555
 
        self.client_structure = [attr for attr in
556
 
                                 self.__dict__.iterkeys()
557
 
                                 if not attr.startswith("_")]
558
 
        self.client_structure.append("client_structure")
559
 
        
560
 
        for name, t in inspect.getmembers(type(self),
561
 
                                          lambda obj:
562
 
                                              isinstance(obj,
563
 
                                                         property)):
564
 
            if not name.startswith("_"):
565
 
                self.client_structure.append(name)
566
 
    
567
 
    # Send notice to process children that client state has changed
568
 
    def send_changedstate(self):
569
 
        with self.changedstate:
570
 
            self.changedstate.notify_all()
571
 
    
572
 
    def enable(self):
573
 
        """Start this client's checker and timeout hooks"""
574
 
        if getattr(self, "enabled", False):
575
 
            # Already enabled
576
 
            return
577
 
        self.expires = datetime.datetime.utcnow() + self.timeout
578
 
        self.enabled = True
579
 
        self.last_enabled = datetime.datetime.utcnow()
580
 
        self.init_checker()
581
 
        self.send_changedstate()
582
 
    
583
 
    def disable(self, quiet=True):
584
 
        """Disable this client."""
585
 
        if not getattr(self, "enabled", False):
586
 
            return False
587
 
        if not quiet:
588
 
            logger.info("Disabling client %s", self.name)
589
 
        if getattr(self, "disable_initiator_tag", None) is not None:
590
 
            gobject.source_remove(self.disable_initiator_tag)
591
 
            self.disable_initiator_tag = None
592
 
        self.expires = None
593
 
        if getattr(self, "checker_initiator_tag", None) is not None:
594
 
            gobject.source_remove(self.checker_initiator_tag)
595
 
            self.checker_initiator_tag = None
596
 
        self.stop_checker()
597
 
        self.enabled = False
598
 
        if not quiet:
599
 
            self.send_changedstate()
600
 
        # Do not run this again if called by a gobject.timeout_add
601
 
        return False
602
 
    
603
 
    def __del__(self):
604
 
        self.disable()
605
 
    
606
 
    def init_checker(self):
 
142
        self.check_command = checker
 
143
    def start(self):
 
144
        """Start this clients checker and timeout hooks"""
607
145
        # Schedule a new checker to be started an 'interval' from now,
608
146
        # and every interval from then on.
609
 
        if self.checker_initiator_tag is not None:
610
 
            gobject.source_remove(self.checker_initiator_tag)
611
 
        self.checker_initiator_tag = (gobject.timeout_add
612
 
                                      (int(self.interval
613
 
                                           .total_seconds() * 1000),
614
 
                                       self.start_checker))
615
 
        # Schedule a disable() when 'timeout' has passed
616
 
        if self.disable_initiator_tag is not None:
617
 
            gobject.source_remove(self.disable_initiator_tag)
618
 
        self.disable_initiator_tag = (gobject.timeout_add
619
 
                                      (int(self.timeout
620
 
                                           .total_seconds() * 1000),
621
 
                                       self.disable))
 
147
        self.checker_initiator_tag = gobject.timeout_add\
 
148
                                     (self._interval_milliseconds,
 
149
                                      self.start_checker)
622
150
        # Also start a new checker *right now*.
623
151
        self.start_checker()
624
 
    
625
 
    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):
626
185
        """The checker has completed, so take appropriate actions."""
627
 
        self.checker_callback_tag = None
628
 
        self.checker = None
629
 
        if os.WIFEXITED(condition):
630
 
            self.last_checker_status = os.WEXITSTATUS(condition)
631
 
            if self.last_checker_status == 0:
632
 
                logger.info("Checker for %(name)s succeeded",
633
 
                            vars(self))
634
 
                self.checked_ok()
635
 
            else:
636
 
                logger.info("Checker for %(name)s failed",
637
 
                            vars(self))
638
 
        else:
639
 
            self.last_checker_status = -1
640
 
            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?",
641
198
                           vars(self))
642
 
    
643
 
    def checked_ok(self):
644
 
        """Assert that the client has been seen, alive and well."""
645
 
        self.last_checked_ok = datetime.datetime.utcnow()
646
 
        self.last_checker_status = 0
647
 
        self.bump_timeout()
648
 
    
649
 
    def bump_timeout(self, timeout=None):
650
 
        """Bump up the timeout for this client."""
651
 
        if timeout is None:
652
 
            timeout = self.timeout
653
 
        if self.disable_initiator_tag is not None:
654
 
            gobject.source_remove(self.disable_initiator_tag)
655
 
            self.disable_initiator_tag = None
656
 
        if getattr(self, "enabled", False):
657
 
            self.disable_initiator_tag = (gobject.timeout_add
658
 
                                          (int(timeout.total_seconds()
659
 
                                               * 1000), self.disable))
660
 
            self.expires = datetime.datetime.utcnow() + timeout
661
 
    
662
 
    def need_approval(self):
663
 
        self.last_approval_request = datetime.datetime.utcnow()
664
 
    
 
199
        else:
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
665
204
    def start_checker(self):
666
205
        """Start a new checker subprocess if one is not running.
667
 
        
668
206
        If a checker already exists, leave it running and do
669
207
        nothing."""
670
 
        # The reason for not killing a running checker is that if we
671
 
        # did that, and if a checker (for some reason) started running
672
 
        # slowly and taking more than 'interval' time, then the client
673
 
        # would inevitably timeout, since no checker would get a
674
 
        # chance to run to completion.  If we instead leave running
675
 
        # checkers alone, the checker would have to take more time
676
 
        # than 'timeout' for the client to be disabled, which is as it
677
 
        # should be.
678
 
        
679
 
        # If a checker exists, make sure it is not a zombie
680
 
        try:
681
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
 
        except AttributeError:
683
 
            pass
684
 
        except OSError as error:
685
 
            if error.errno != errno.ECHILD:
686
 
                raise
687
 
        else:
688
 
            if pid:
689
 
                logger.warning("Checker was a zombie")
690
 
                gobject.source_remove(self.checker_callback_tag)
691
 
                self.checker_callback(pid, status,
692
 
                                      self.current_checker_command)
693
 
        # Start a new checker if needed
694
208
        if self.checker is None:
695
 
            # Escape attributes for the shell
696
 
            escaped_attrs = { attr:
697
 
                                  re.escape(str(getattr(self, attr)))
698
 
                              for attr in self.runtime_expansions }
699
 
            try:
700
 
                command = self.checker_command % escaped_attrs
701
 
            except TypeError as error:
702
 
                logger.error('Could not format string "%s"',
703
 
                             self.checker_command, exc_info=error)
704
 
                return True # Try again later
705
 
            self.current_checker_command = command
706
 
            try:
707
 
                logger.info("Starting checker %r for %s",
708
 
                            command, self.name)
709
 
                # We don't need to redirect stdout and stderr, since
710
 
                # in normal mode, that is already done by daemon(),
711
 
                # and in debug mode we don't want to.  (Stdin is
712
 
                # always replaced by /dev/null.)
713
 
                # The exception is when not debugging but nevertheless
714
 
                # running in the foreground; use the previously
715
 
                # created wnull.
716
 
                popen_args = {}
717
 
                if (not self.server_settings["debug"]
718
 
                    and self.server_settings["foreground"]):
719
 
                    popen_args.update({"stdout": wnull,
720
 
                                       "stderr": wnull })
721
 
                self.checker = subprocess.Popen(command,
722
 
                                                close_fds=True,
723
 
                                                shell=True, cwd="/",
724
 
                                                **popen_args)
725
 
            except OSError as error:
726
 
                logger.error("Failed to start subprocess",
727
 
                             exc_info=error)
728
 
                return True
729
 
            self.checker_callback_tag = (gobject.child_watch_add
730
 
                                         (self.checker.pid,
731
 
                                          self.checker_callback,
732
 
                                          data=command))
733
 
            # The checker may have completed before the gobject
734
 
            # watch was added.  Check for this.
735
 
            try:
736
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
 
            except OSError as error:
738
 
                if error.errno == errno.ECHILD:
739
 
                    # This should never happen
740
 
                    logger.error("Child process vanished",
741
 
                                 exc_info=error)
742
 
                    return True
743
 
                raise
744
 
            if pid:
745
 
                gobject.source_remove(self.checker_callback_tag)
746
 
                self.checker_callback(pid, status, command)
 
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)
747
236
        # Re-run this periodically if run by gobject.timeout_add
748
237
        return True
749
 
    
750
238
    def stop_checker(self):
751
239
        """Force the checker process, if any, to stop."""
752
 
        if self.checker_callback_tag:
753
 
            gobject.source_remove(self.checker_callback_tag)
754
 
            self.checker_callback_tag = None
755
 
        if getattr(self, "checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
756
241
            return
757
 
        logger.debug("Stopping checker for %(name)s", vars(self))
758
 
        try:
759
 
            self.checker.terminate()
760
 
            #time.sleep(0.5)
761
 
            #if self.checker.poll() is None:
762
 
            #    self.checker.kill()
763
 
        except OSError as error:
764
 
            if error.errno != errno.ESRCH: # No such process
765
 
                raise
766
 
        self.checker = None
767
 
 
768
 
 
769
 
def dbus_service_property(dbus_interface, signature="v",
770
 
                          access="readwrite", byte_arrays=False):
771
 
    """Decorators for marking methods of a DBusObjectWithProperties to
772
 
    become properties on the D-Bus.
773
 
    
774
 
    The decorated method will be called with no arguments by "Get"
775
 
    and with one argument by "Set".
776
 
    
777
 
    The parameters, where they are supported, are the same as
778
 
    dbus.service.method, except there is only "signature", since the
779
 
    type from Get() and the type sent to Set() is the same.
780
 
    """
781
 
    # Encoding deeply encoded byte arrays is not supported yet by the
782
 
    # "Set" method, so we fail early here:
783
 
    if byte_arrays and signature != "ay":
784
 
        raise ValueError("Byte arrays not supported for non-'ay'"
785
 
                         " signature {!r}".format(signature))
786
 
    def decorator(func):
787
 
        func._dbus_is_property = True
788
 
        func._dbus_interface = dbus_interface
789
 
        func._dbus_signature = signature
790
 
        func._dbus_access = access
791
 
        func._dbus_name = func.__name__
792
 
        if func._dbus_name.endswith("_dbus_property"):
793
 
            func._dbus_name = func._dbus_name[:-14]
794
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
 
        return func
796
 
    return decorator
797
 
 
798
 
 
799
 
def dbus_interface_annotations(dbus_interface):
800
 
    """Decorator for marking functions returning interface annotations
801
 
    
802
 
    Usage:
803
 
    
804
 
    @dbus_interface_annotations("org.example.Interface")
805
 
    def _foo(self):  # Function name does not matter
806
 
        return {"org.freedesktop.DBus.Deprecated": "true",
807
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
808
 
                    "false"}
809
 
    """
810
 
    def decorator(func):
811
 
        func._dbus_is_interface = True
812
 
        func._dbus_interface = dbus_interface
813
 
        func._dbus_name = dbus_interface
814
 
        return func
815
 
    return decorator
816
 
 
817
 
 
818
 
def dbus_annotations(annotations):
819
 
    """Decorator to annotate D-Bus methods, signals or properties
820
 
    Usage:
821
 
    
822
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
 
                       "org.freedesktop.DBus.Property."
824
 
                       "EmitsChangedSignal": "false"})
825
 
    @dbus_service_property("org.example.Interface", signature="b",
826
 
                           access="r")
827
 
    def Property_dbus_property(self):
828
 
        return dbus.Boolean(False)
829
 
    """
830
 
    def decorator(func):
831
 
        func._dbus_annotations = annotations
832
 
        return func
833
 
    return decorator
834
 
 
835
 
 
836
 
class DBusPropertyException(dbus.exceptions.DBusException):
837
 
    """A base class for D-Bus property-related exceptions
838
 
    """
839
 
    pass
840
 
 
841
 
class DBusPropertyAccessException(DBusPropertyException):
842
 
    """A property's access permissions disallows an operation.
843
 
    """
844
 
    pass
845
 
 
846
 
 
847
 
class DBusPropertyNotFound(DBusPropertyException):
848
 
    """An attempt was made to access a non-existing property.
849
 
    """
850
 
    pass
851
 
 
852
 
 
853
 
class DBusObjectWithProperties(dbus.service.Object):
854
 
    """A D-Bus object with properties.
855
 
    
856
 
    Classes inheriting from this can use the dbus_service_property
857
 
    decorator to expose methods as D-Bus properties.  It exposes the
858
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
859
 
    """
860
 
    
861
 
    @staticmethod
862
 
    def _is_dbus_thing(thing):
863
 
        """Returns a function testing if an attribute is a D-Bus thing
864
 
        
865
 
        If called like _is_dbus_thing("method") it returns a function
866
 
        suitable for use as predicate to inspect.getmembers().
867
 
        """
868
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
 
                                   False)
870
 
    
871
 
    def _get_all_dbus_things(self, thing):
872
 
        """Returns a generator of (name, attribute) pairs
873
 
        """
874
 
        return ((getattr(athing.__get__(self), "_dbus_name",
875
 
                         name),
876
 
                 athing.__get__(self))
877
 
                for cls in self.__class__.__mro__
878
 
                for name, athing in
879
 
                inspect.getmembers(cls,
880
 
                                   self._is_dbus_thing(thing)))
881
 
    
882
 
    def _get_dbus_property(self, interface_name, property_name):
883
 
        """Returns a bound method if one exists which is a D-Bus
884
 
        property with the specified name and interface.
885
 
        """
886
 
        for cls in  self.__class__.__mro__:
887
 
            for name, value in (inspect.getmembers
888
 
                                (cls,
889
 
                                 self._is_dbus_thing("property"))):
890
 
                if (value._dbus_name == property_name
891
 
                    and value._dbus_interface == interface_name):
892
 
                    return value.__get__(self)
893
 
        
894
 
        # No such property
895
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
 
                                   + interface_name + "."
897
 
                                   + property_name)
898
 
    
899
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
900
 
                         out_signature="v")
901
 
    def Get(self, interface_name, property_name):
902
 
        """Standard D-Bus property Get() method, see D-Bus standard.
903
 
        """
904
 
        prop = self._get_dbus_property(interface_name, property_name)
905
 
        if prop._dbus_access == "write":
906
 
            raise DBusPropertyAccessException(property_name)
907
 
        value = prop()
908
 
        if not hasattr(value, "variant_level"):
909
 
            return value
910
 
        return type(value)(value, variant_level=value.variant_level+1)
911
 
    
912
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
913
 
    def Set(self, interface_name, property_name, value):
914
 
        """Standard D-Bus property Set() method, see D-Bus standard.
915
 
        """
916
 
        prop = self._get_dbus_property(interface_name, property_name)
917
 
        if prop._dbus_access == "read":
918
 
            raise DBusPropertyAccessException(property_name)
919
 
        if prop._dbus_get_args_options["byte_arrays"]:
920
 
            # The byte_arrays option is not supported yet on
921
 
            # signatures other than "ay".
922
 
            if prop._dbus_signature != "ay":
923
 
                raise ValueError("Byte arrays not supported for non-"
924
 
                                 "'ay' signature {!r}"
925
 
                                 .format(prop._dbus_signature))
926
 
            value = dbus.ByteArray(b''.join(chr(byte)
927
 
                                            for byte in value))
928
 
        prop(value)
929
 
    
930
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
931
 
                         out_signature="a{sv}")
932
 
    def GetAll(self, interface_name):
933
 
        """Standard D-Bus property GetAll() method, see D-Bus
934
 
        standard.
935
 
        
936
 
        Note: Will not include properties with access="write".
937
 
        """
938
 
        properties = {}
939
 
        for name, prop in self._get_all_dbus_things("property"):
940
 
            if (interface_name
941
 
                and interface_name != prop._dbus_interface):
942
 
                # Interface non-empty but did not match
943
 
                continue
944
 
            # Ignore write-only properties
945
 
            if prop._dbus_access == "write":
946
 
                continue
947
 
            value = prop()
948
 
            if not hasattr(value, "variant_level"):
949
 
                properties[name] = value
950
 
                continue
951
 
            properties[name] = type(value)(value, variant_level=
952
 
                                           value.variant_level+1)
953
 
        return dbus.Dictionary(properties, signature="sv")
954
 
    
955
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
 
    def PropertiesChanged(self, interface_name, changed_properties,
957
 
                          invalidated_properties):
958
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
959
 
        standard.
960
 
        """
961
 
        pass
962
 
    
963
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
 
                         out_signature="s",
965
 
                         path_keyword='object_path',
966
 
                         connection_keyword='connection')
967
 
    def Introspect(self, object_path, connection):
968
 
        """Overloading of standard D-Bus method.
969
 
        
970
 
        Inserts property tags and interface annotation tags.
971
 
        """
972
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
973
 
                                                   connection)
974
 
        try:
975
 
            document = xml.dom.minidom.parseString(xmlstring)
976
 
            def make_tag(document, name, prop):
977
 
                e = document.createElement("property")
978
 
                e.setAttribute("name", name)
979
 
                e.setAttribute("type", prop._dbus_signature)
980
 
                e.setAttribute("access", prop._dbus_access)
981
 
                return e
982
 
            for if_tag in document.getElementsByTagName("interface"):
983
 
                # Add property tags
984
 
                for tag in (make_tag(document, name, prop)
985
 
                            for name, prop
986
 
                            in self._get_all_dbus_things("property")
987
 
                            if prop._dbus_interface
988
 
                            == if_tag.getAttribute("name")):
989
 
                    if_tag.appendChild(tag)
990
 
                # Add annotation tags
991
 
                for typ in ("method", "signal", "property"):
992
 
                    for tag in if_tag.getElementsByTagName(typ):
993
 
                        annots = dict()
994
 
                        for name, prop in (self.
995
 
                                           _get_all_dbus_things(typ)):
996
 
                            if (name == tag.getAttribute("name")
997
 
                                and prop._dbus_interface
998
 
                                == if_tag.getAttribute("name")):
999
 
                                annots.update(getattr
1000
 
                                              (prop,
1001
 
                                               "_dbus_annotations",
1002
 
                                               {}))
1003
 
                        for name, value in annots.items():
1004
 
                            ann_tag = document.createElement(
1005
 
                                "annotation")
1006
 
                            ann_tag.setAttribute("name", name)
1007
 
                            ann_tag.setAttribute("value", value)
1008
 
                            tag.appendChild(ann_tag)
1009
 
                # Add interface annotation tags
1010
 
                for annotation, value in dict(
1011
 
                    itertools.chain.from_iterable(
1012
 
                        annotations().items()
1013
 
                        for name, annotations in
1014
 
                        self._get_all_dbus_things("interface")
1015
 
                        if name == if_tag.getAttribute("name")
1016
 
                        )).items():
1017
 
                    ann_tag = document.createElement("annotation")
1018
 
                    ann_tag.setAttribute("name", annotation)
1019
 
                    ann_tag.setAttribute("value", value)
1020
 
                    if_tag.appendChild(ann_tag)
1021
 
                # Add the names to the return values for the
1022
 
                # "org.freedesktop.DBus.Properties" methods
1023
 
                if (if_tag.getAttribute("name")
1024
 
                    == "org.freedesktop.DBus.Properties"):
1025
 
                    for cn in if_tag.getElementsByTagName("method"):
1026
 
                        if cn.getAttribute("name") == "Get":
1027
 
                            for arg in cn.getElementsByTagName("arg"):
1028
 
                                if (arg.getAttribute("direction")
1029
 
                                    == "out"):
1030
 
                                    arg.setAttribute("name", "value")
1031
 
                        elif cn.getAttribute("name") == "GetAll":
1032
 
                            for arg in cn.getElementsByTagName("arg"):
1033
 
                                if (arg.getAttribute("direction")
1034
 
                                    == "out"):
1035
 
                                    arg.setAttribute("name", "props")
1036
 
            xmlstring = document.toxml("utf-8")
1037
 
            document.unlink()
1038
 
        except (AttributeError, xml.dom.DOMException,
1039
 
                xml.parsers.expat.ExpatError) as error:
1040
 
            logger.error("Failed to override Introspection method",
1041
 
                         exc_info=error)
1042
 
        return xmlstring
1043
 
 
1044
 
 
1045
 
def datetime_to_dbus(dt, variant_level=0):
1046
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1047
 
    if dt is None:
1048
 
        return dbus.String("", variant_level = variant_level)
1049
 
    return dbus.String(dt.isoformat(),
1050
 
                       variant_level=variant_level)
1051
 
 
1052
 
 
1053
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
 
    """A class decorator; applied to a subclass of
1055
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1056
 
    interface names according to the "alt_interface_names" mapping.
1057
 
    Usage:
1058
 
    
1059
 
    @alternate_dbus_interfaces({"org.example.Interface":
1060
 
                                    "net.example.AlternateInterface"})
1061
 
    class SampleDBusObject(dbus.service.Object):
1062
 
        @dbus.service.method("org.example.Interface")
1063
 
        def SampleDBusMethod():
1064
 
            pass
1065
 
    
1066
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
 
    reachable via two interfaces: "org.example.Interface" and
1068
 
    "net.example.AlternateInterface", the latter of which will have
1069
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
 
    "true", unless "deprecate" is passed with a False value.
1071
 
    
1072
 
    This works for methods and signals, and also for D-Bus properties
1073
 
    (from DBusObjectWithProperties) and interfaces (from the
1074
 
    dbus_interface_annotations decorator).
1075
 
    """
1076
 
    def wrapper(cls):
1077
 
        for orig_interface_name, alt_interface_name in (
1078
 
            alt_interface_names.items()):
1079
 
            attr = {}
1080
 
            interface_names = set()
1081
 
            # Go though all attributes of the class
1082
 
            for attrname, attribute in inspect.getmembers(cls):
1083
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1084
 
                # with the wrong interface name
1085
 
                if (not hasattr(attribute, "_dbus_interface")
1086
 
                    or not attribute._dbus_interface
1087
 
                    .startswith(orig_interface_name)):
1088
 
                    continue
1089
 
                # Create an alternate D-Bus interface name based on
1090
 
                # the current name
1091
 
                alt_interface = (attribute._dbus_interface
1092
 
                                 .replace(orig_interface_name,
1093
 
                                          alt_interface_name))
1094
 
                interface_names.add(alt_interface)
1095
 
                # Is this a D-Bus signal?
1096
 
                if getattr(attribute, "_dbus_is_signal", False):
1097
 
                    # Extract the original non-method undecorated
1098
 
                    # function by black magic
1099
 
                    nonmethod_func = (dict(
1100
 
                            zip(attribute.func_code.co_freevars,
1101
 
                                attribute.__closure__))["func"]
1102
 
                                      .cell_contents)
1103
 
                    # Create a new, but exactly alike, function
1104
 
                    # object, and decorate it to be a new D-Bus signal
1105
 
                    # with the alternate D-Bus interface name
1106
 
                    new_function = (dbus.service.signal
1107
 
                                    (alt_interface,
1108
 
                                     attribute._dbus_signature)
1109
 
                                    (types.FunctionType(
1110
 
                                nonmethod_func.func_code,
1111
 
                                nonmethod_func.func_globals,
1112
 
                                nonmethod_func.func_name,
1113
 
                                nonmethod_func.func_defaults,
1114
 
                                nonmethod_func.func_closure)))
1115
 
                    # Copy annotations, if any
1116
 
                    try:
1117
 
                        new_function._dbus_annotations = (
1118
 
                            dict(attribute._dbus_annotations))
1119
 
                    except AttributeError:
1120
 
                        pass
1121
 
                    # Define a creator of a function to call both the
1122
 
                    # original and alternate functions, so both the
1123
 
                    # original and alternate signals gets sent when
1124
 
                    # the function is called
1125
 
                    def fixscope(func1, func2):
1126
 
                        """This function is a scope container to pass
1127
 
                        func1 and func2 to the "call_both" function
1128
 
                        outside of its arguments"""
1129
 
                        def call_both(*args, **kwargs):
1130
 
                            """This function will emit two D-Bus
1131
 
                            signals by calling func1 and func2"""
1132
 
                            func1(*args, **kwargs)
1133
 
                            func2(*args, **kwargs)
1134
 
                        return call_both
1135
 
                    # Create the "call_both" function and add it to
1136
 
                    # the class
1137
 
                    attr[attrname] = fixscope(attribute, new_function)
1138
 
                # Is this a D-Bus method?
1139
 
                elif getattr(attribute, "_dbus_is_method", False):
1140
 
                    # Create a new, but exactly alike, function
1141
 
                    # object.  Decorate it to be a new D-Bus method
1142
 
                    # with the alternate D-Bus interface name.  Add it
1143
 
                    # to the class.
1144
 
                    attr[attrname] = (dbus.service.method
1145
 
                                      (alt_interface,
1146
 
                                       attribute._dbus_in_signature,
1147
 
                                       attribute._dbus_out_signature)
1148
 
                                      (types.FunctionType
1149
 
                                       (attribute.func_code,
1150
 
                                        attribute.func_globals,
1151
 
                                        attribute.func_name,
1152
 
                                        attribute.func_defaults,
1153
 
                                        attribute.func_closure)))
1154
 
                    # Copy annotations, if any
1155
 
                    try:
1156
 
                        attr[attrname]._dbus_annotations = (
1157
 
                            dict(attribute._dbus_annotations))
1158
 
                    except AttributeError:
1159
 
                        pass
1160
 
                # Is this a D-Bus property?
1161
 
                elif getattr(attribute, "_dbus_is_property", False):
1162
 
                    # Create a new, but exactly alike, function
1163
 
                    # object, and decorate it to be a new D-Bus
1164
 
                    # property with the alternate D-Bus interface
1165
 
                    # name.  Add it to the class.
1166
 
                    attr[attrname] = (dbus_service_property
1167
 
                                      (alt_interface,
1168
 
                                       attribute._dbus_signature,
1169
 
                                       attribute._dbus_access,
1170
 
                                       attribute
1171
 
                                       ._dbus_get_args_options
1172
 
                                       ["byte_arrays"])
1173
 
                                      (types.FunctionType
1174
 
                                       (attribute.func_code,
1175
 
                                        attribute.func_globals,
1176
 
                                        attribute.func_name,
1177
 
                                        attribute.func_defaults,
1178
 
                                        attribute.func_closure)))
1179
 
                    # Copy annotations, if any
1180
 
                    try:
1181
 
                        attr[attrname]._dbus_annotations = (
1182
 
                            dict(attribute._dbus_annotations))
1183
 
                    except AttributeError:
1184
 
                        pass
1185
 
                # Is this a D-Bus interface?
1186
 
                elif getattr(attribute, "_dbus_is_interface", False):
1187
 
                    # Create a new, but exactly alike, function
1188
 
                    # object.  Decorate it to be a new D-Bus interface
1189
 
                    # with the alternate D-Bus interface name.  Add it
1190
 
                    # to the class.
1191
 
                    attr[attrname] = (dbus_interface_annotations
1192
 
                                      (alt_interface)
1193
 
                                      (types.FunctionType
1194
 
                                       (attribute.func_code,
1195
 
                                        attribute.func_globals,
1196
 
                                        attribute.func_name,
1197
 
                                        attribute.func_defaults,
1198
 
                                        attribute.func_closure)))
1199
 
            if deprecate:
1200
 
                # Deprecate all alternate interfaces
1201
 
                iname="_AlternateDBusNames_interface_annotation{}"
1202
 
                for interface_name in interface_names:
1203
 
                    @dbus_interface_annotations(interface_name)
1204
 
                    def func(self):
1205
 
                        return { "org.freedesktop.DBus.Deprecated":
1206
 
                                     "true" }
1207
 
                    # Find an unused name
1208
 
                    for aname in (iname.format(i)
1209
 
                                  for i in itertools.count()):
1210
 
                        if aname not in attr:
1211
 
                            attr[aname] = func
1212
 
                            break
1213
 
            if interface_names:
1214
 
                # Replace the class with a new subclass of it with
1215
 
                # methods, signals, etc. as created above.
1216
 
                cls = type(b"{}Alternate".format(cls.__name__),
1217
 
                           (cls,), attr)
1218
 
        return cls
1219
 
    return wrapper
1220
 
 
1221
 
 
1222
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
 
                                "se.bsnet.fukt.Mandos"})
1224
 
class ClientDBus(Client, DBusObjectWithProperties):
1225
 
    """A Client class using D-Bus
1226
 
    
1227
 
    Attributes:
1228
 
    dbus_object_path: dbus.ObjectPath
1229
 
    bus: dbus.SystemBus()
1230
 
    """
1231
 
    
1232
 
    runtime_expansions = (Client.runtime_expansions
1233
 
                          + ("dbus_object_path",))
1234
 
    
1235
 
    _interface = "se.recompile.Mandos.Client"
1236
 
    
1237
 
    # dbus.service.Object doesn't use super(), so we can't either.
1238
 
    
1239
 
    def __init__(self, bus = None, *args, **kwargs):
1240
 
        self.bus = bus
1241
 
        Client.__init__(self, *args, **kwargs)
1242
 
        # Only now, when this client is initialized, can it show up on
1243
 
        # the D-Bus
1244
 
        client_object_name = str(self.name).translate(
1245
 
            {ord("."): ord("_"),
1246
 
             ord("-"): ord("_")})
1247
 
        self.dbus_object_path = (dbus.ObjectPath
1248
 
                                 ("/clients/" + client_object_name))
1249
 
        DBusObjectWithProperties.__init__(self, self.bus,
1250
 
                                          self.dbus_object_path)
1251
 
    
1252
 
    def notifychangeproperty(transform_func,
1253
 
                             dbus_name, type_func=lambda x: x,
1254
 
                             variant_level=1, invalidate_only=False,
1255
 
                             _interface=_interface):
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 = "_{}".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
 
                    if invalidate_only:
1273
 
                        self.PropertiesChanged(_interface,
1274
 
                                               dbus.Dictionary(),
1275
 
                                               dbus.Array
1276
 
                                               ((dbus_name,)))
1277
 
                    else:
1278
 
                        dbus_value = transform_func(type_func(value),
1279
 
                                                    variant_level
1280
 
                                                    =variant_level)
1281
 
                        self.PropertyChanged(dbus.String(dbus_name),
1282
 
                                             dbus_value)
1283
 
                        self.PropertiesChanged(_interface,
1284
 
                                               dbus.Dictionary({
1285
 
                                    dbus.String(dbus_name):
1286
 
                                        dbus_value }), dbus.Array())
1287
 
            setattr(self, attrname, value)
1288
 
        
1289
 
        return property(lambda self: getattr(self, attrname), setter)
1290
 
    
1291
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1293
 
                                             "ApprovalPending",
1294
 
                                             type_func = bool)
1295
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1297
 
                                        "LastEnabled")
1298
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
 
                                   type_func = lambda checker:
1300
 
                                       checker is not None)
1301
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
 
                                           "LastCheckedOK")
1303
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1304
 
                                               "LastCheckerStatus")
1305
 
    last_approval_request = notifychangeproperty(
1306
 
        datetime_to_dbus, "LastApprovalRequest")
1307
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1308
 
                                               "ApprovedByDefault")
1309
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1310
 
                                          "ApprovalDelay",
1311
 
                                          type_func =
1312
 
                                          lambda td: td.total_seconds()
1313
 
                                          * 1000)
1314
 
    approval_duration = notifychangeproperty(
1315
 
        dbus.UInt64, "ApprovalDuration",
1316
 
        type_func = lambda td: td.total_seconds() * 1000)
1317
 
    host = notifychangeproperty(dbus.String, "Host")
1318
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
 
                                   type_func = lambda td:
1320
 
                                       td.total_seconds() * 1000)
1321
 
    extended_timeout = notifychangeproperty(
1322
 
        dbus.UInt64, "ExtendedTimeout",
1323
 
        type_func = lambda td: td.total_seconds() * 1000)
1324
 
    interval = notifychangeproperty(dbus.UInt64,
1325
 
                                    "Interval",
1326
 
                                    type_func =
1327
 
                                    lambda td: td.total_seconds()
1328
 
                                    * 1000)
1329
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1330
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
 
                                  invalidate_only=True)
1332
 
    
1333
 
    del notifychangeproperty
1334
 
    
1335
 
    def __del__(self, *args, **kwargs):
1336
 
        try:
1337
 
            self.remove_from_connection()
1338
 
        except LookupError:
1339
 
            pass
1340
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1341
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1342
 
        Client.__del__(self, *args, **kwargs)
1343
 
    
1344
 
    def checker_callback(self, pid, condition, command,
1345
 
                         *args, **kwargs):
 
242
        gobject.source_remove(self.checker_callback_tag)
1346
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)
1347
247
        self.checker = None
1348
 
        if os.WIFEXITED(condition):
1349
 
            exitstatus = os.WEXITSTATUS(condition)
1350
 
            # Emit D-Bus signal
1351
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1352
 
                                  dbus.Int64(condition),
1353
 
                                  dbus.String(command))
1354
 
        else:
1355
 
            # Emit D-Bus signal
1356
 
            self.CheckerCompleted(dbus.Int16(-1),
1357
 
                                  dbus.Int64(condition),
1358
 
                                  dbus.String(command))
1359
 
        
1360
 
        return Client.checker_callback(self, pid, condition, command,
1361
 
                                       *args, **kwargs)
1362
 
    
1363
 
    def start_checker(self, *args, **kwargs):
1364
 
        old_checker_pid = getattr(self.checker, "pid", None)
1365
 
        r = Client.start_checker(self, *args, **kwargs)
1366
 
        # Only if new checker process was started
1367
 
        if (self.checker is not None
1368
 
            and old_checker_pid != self.checker.pid):
1369
 
            # Emit D-Bus signal
1370
 
            self.CheckerStarted(self.current_checker_command)
1371
 
        return r
1372
 
    
1373
 
    def _reset_approved(self):
1374
 
        self.approved = None
1375
 
        return False
1376
 
    
1377
 
    def approve(self, value=True):
1378
 
        self.approved = value
1379
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
 
                                * 1000), self._reset_approved)
1381
 
        self.send_changedstate()
1382
 
    
1383
 
    ## D-Bus methods, signals & properties
1384
 
    
1385
 
    ## Interfaces
1386
 
    
1387
 
    ## Signals
1388
 
    
1389
 
    # CheckerCompleted - signal
1390
 
    @dbus.service.signal(_interface, signature="nxs")
1391
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1392
 
        "D-Bus signal"
1393
 
        pass
1394
 
    
1395
 
    # CheckerStarted - signal
1396
 
    @dbus.service.signal(_interface, signature="s")
1397
 
    def CheckerStarted(self, command):
1398
 
        "D-Bus signal"
1399
 
        pass
1400
 
    
1401
 
    # PropertyChanged - signal
1402
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
 
    @dbus.service.signal(_interface, signature="sv")
1404
 
    def PropertyChanged(self, property, value):
1405
 
        "D-Bus signal"
1406
 
        pass
1407
 
    
1408
 
    # GotSecret - signal
1409
 
    @dbus.service.signal(_interface)
1410
 
    def GotSecret(self):
1411
 
        """D-Bus signal
1412
 
        Is sent after a successful transfer of secret from the Mandos
1413
 
        server to mandos-client
1414
 
        """
1415
 
        pass
1416
 
    
1417
 
    # Rejected - signal
1418
 
    @dbus.service.signal(_interface, signature="s")
1419
 
    def Rejected(self, reason):
1420
 
        "D-Bus signal"
1421
 
        pass
1422
 
    
1423
 
    # NeedApproval - signal
1424
 
    @dbus.service.signal(_interface, signature="tb")
1425
 
    def NeedApproval(self, timeout, default):
1426
 
        "D-Bus signal"
1427
 
        return self.need_approval()
1428
 
    
1429
 
    ## Methods
1430
 
    
1431
 
    # Approve - method
1432
 
    @dbus.service.method(_interface, in_signature="b")
1433
 
    def Approve(self, value):
1434
 
        self.approve(value)
1435
 
    
1436
 
    # CheckedOK - method
1437
 
    @dbus.service.method(_interface)
1438
 
    def CheckedOK(self):
1439
 
        self.checked_ok()
1440
 
    
1441
 
    # Enable - method
1442
 
    @dbus.service.method(_interface)
1443
 
    def Enable(self):
1444
 
        "D-Bus method"
1445
 
        self.enable()
1446
 
    
1447
 
    # StartChecker - method
1448
 
    @dbus.service.method(_interface)
1449
 
    def StartChecker(self):
1450
 
        "D-Bus method"
1451
 
        self.start_checker()
1452
 
    
1453
 
    # Disable - method
1454
 
    @dbus.service.method(_interface)
1455
 
    def Disable(self):
1456
 
        "D-Bus method"
1457
 
        self.disable()
1458
 
    
1459
 
    # StopChecker - method
1460
 
    @dbus.service.method(_interface)
1461
 
    def StopChecker(self):
1462
 
        self.stop_checker()
1463
 
    
1464
 
    ## Properties
1465
 
    
1466
 
    # ApprovalPending - property
1467
 
    @dbus_service_property(_interface, signature="b", access="read")
1468
 
    def ApprovalPending_dbus_property(self):
1469
 
        return dbus.Boolean(bool(self.approvals_pending))
1470
 
    
1471
 
    # ApprovedByDefault - property
1472
 
    @dbus_service_property(_interface, signature="b",
1473
 
                           access="readwrite")
1474
 
    def ApprovedByDefault_dbus_property(self, value=None):
1475
 
        if value is None:       # get
1476
 
            return dbus.Boolean(self.approved_by_default)
1477
 
        self.approved_by_default = bool(value)
1478
 
    
1479
 
    # ApprovalDelay - property
1480
 
    @dbus_service_property(_interface, signature="t",
1481
 
                           access="readwrite")
1482
 
    def ApprovalDelay_dbus_property(self, value=None):
1483
 
        if value is None:       # get
1484
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1485
 
                               * 1000)
1486
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
 
    
1488
 
    # ApprovalDuration - property
1489
 
    @dbus_service_property(_interface, signature="t",
1490
 
                           access="readwrite")
1491
 
    def ApprovalDuration_dbus_property(self, value=None):
1492
 
        if value is None:       # get
1493
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1494
 
                               * 1000)
1495
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
 
    
1497
 
    # Name - property
1498
 
    @dbus_service_property(_interface, signature="s", access="read")
1499
 
    def Name_dbus_property(self):
1500
 
        return dbus.String(self.name)
1501
 
    
1502
 
    # Fingerprint - property
1503
 
    @dbus_service_property(_interface, signature="s", access="read")
1504
 
    def Fingerprint_dbus_property(self):
1505
 
        return dbus.String(self.fingerprint)
1506
 
    
1507
 
    # Host - property
1508
 
    @dbus_service_property(_interface, signature="s",
1509
 
                           access="readwrite")
1510
 
    def Host_dbus_property(self, value=None):
1511
 
        if value is None:       # get
1512
 
            return dbus.String(self.host)
1513
 
        self.host = str(value)
1514
 
    
1515
 
    # Created - property
1516
 
    @dbus_service_property(_interface, signature="s", access="read")
1517
 
    def Created_dbus_property(self):
1518
 
        return datetime_to_dbus(self.created)
1519
 
    
1520
 
    # LastEnabled - property
1521
 
    @dbus_service_property(_interface, signature="s", access="read")
1522
 
    def LastEnabled_dbus_property(self):
1523
 
        return datetime_to_dbus(self.last_enabled)
1524
 
    
1525
 
    # Enabled - property
1526
 
    @dbus_service_property(_interface, signature="b",
1527
 
                           access="readwrite")
1528
 
    def Enabled_dbus_property(self, value=None):
1529
 
        if value is None:       # get
1530
 
            return dbus.Boolean(self.enabled)
1531
 
        if value:
1532
 
            self.enable()
1533
 
        else:
1534
 
            self.disable()
1535
 
    
1536
 
    # LastCheckedOK - property
1537
 
    @dbus_service_property(_interface, signature="s",
1538
 
                           access="readwrite")
1539
 
    def LastCheckedOK_dbus_property(self, value=None):
1540
 
        if value is not None:
1541
 
            self.checked_ok()
1542
 
            return
1543
 
        return datetime_to_dbus(self.last_checked_ok)
1544
 
    
1545
 
    # LastCheckerStatus - property
1546
 
    @dbus_service_property(_interface, signature="n",
1547
 
                           access="read")
1548
 
    def LastCheckerStatus_dbus_property(self):
1549
 
        return dbus.Int16(self.last_checker_status)
1550
 
    
1551
 
    # Expires - property
1552
 
    @dbus_service_property(_interface, signature="s", access="read")
1553
 
    def Expires_dbus_property(self):
1554
 
        return datetime_to_dbus(self.expires)
1555
 
    
1556
 
    # LastApprovalRequest - property
1557
 
    @dbus_service_property(_interface, signature="s", access="read")
1558
 
    def LastApprovalRequest_dbus_property(self):
1559
 
        return datetime_to_dbus(self.last_approval_request)
1560
 
    
1561
 
    # Timeout - property
1562
 
    @dbus_service_property(_interface, signature="t",
1563
 
                           access="readwrite")
1564
 
    def Timeout_dbus_property(self, value=None):
1565
 
        if value is None:       # get
1566
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
 
        old_timeout = self.timeout
1568
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1569
 
        # Reschedule disabling
1570
 
        if self.enabled:
1571
 
            now = datetime.datetime.utcnow()
1572
 
            self.expires += self.timeout - old_timeout
1573
 
            if self.expires <= now:
1574
 
                # The timeout has passed
1575
 
                self.disable()
1576
 
            else:
1577
 
                if (getattr(self, "disable_initiator_tag", None)
1578
 
                    is None):
1579
 
                    return
1580
 
                gobject.source_remove(self.disable_initiator_tag)
1581
 
                self.disable_initiator_tag = (
1582
 
                    gobject.timeout_add(
1583
 
                        int((self.expires - now).total_seconds()
1584
 
                            * 1000), self.disable))
1585
 
    
1586
 
    # ExtendedTimeout - property
1587
 
    @dbus_service_property(_interface, signature="t",
1588
 
                           access="readwrite")
1589
 
    def ExtendedTimeout_dbus_property(self, value=None):
1590
 
        if value is None:       # get
1591
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1592
 
                               * 1000)
1593
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
 
    
1595
 
    # Interval - property
1596
 
    @dbus_service_property(_interface, signature="t",
1597
 
                           access="readwrite")
1598
 
    def Interval_dbus_property(self, value=None):
1599
 
        if value is None:       # get
1600
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1601
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1602
 
        if getattr(self, "checker_initiator_tag", None) is None:
1603
 
            return
1604
 
        if self.enabled:
1605
 
            # Reschedule checker run
1606
 
            gobject.source_remove(self.checker_initiator_tag)
1607
 
            self.checker_initiator_tag = (gobject.timeout_add
1608
 
                                          (value, self.start_checker))
1609
 
            self.start_checker()    # Start one now, too
1610
 
    
1611
 
    # Checker - property
1612
 
    @dbus_service_property(_interface, signature="s",
1613
 
                           access="readwrite")
1614
 
    def Checker_dbus_property(self, value=None):
1615
 
        if value is None:       # get
1616
 
            return dbus.String(self.checker_command)
1617
 
        self.checker_command = str(value)
1618
 
    
1619
 
    # CheckerRunning - property
1620
 
    @dbus_service_property(_interface, signature="b",
1621
 
                           access="readwrite")
1622
 
    def CheckerRunning_dbus_property(self, value=None):
1623
 
        if value is None:       # get
1624
 
            return dbus.Boolean(self.checker is not None)
1625
 
        if value:
1626
 
            self.start_checker()
1627
 
        else:
1628
 
            self.stop_checker()
1629
 
    
1630
 
    # ObjectPath - property
1631
 
    @dbus_service_property(_interface, signature="o", access="read")
1632
 
    def ObjectPath_dbus_property(self):
1633
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1634
 
    
1635
 
    # Secret = property
1636
 
    @dbus_service_property(_interface, signature="ay",
1637
 
                           access="write", byte_arrays=True)
1638
 
    def Secret_dbus_property(self, value):
1639
 
        self.secret = bytes(value)
1640
 
    
1641
 
    del _interface
1642
 
 
1643
 
 
1644
 
class ProxyClient(object):
1645
 
    def __init__(self, child_pipe, fpr, address):
1646
 
        self._pipe = child_pipe
1647
 
        self._pipe.send(('init', fpr, address))
1648
 
        if not self._pipe.recv():
1649
 
            raise KeyError()
1650
 
    
1651
 
    def __getattribute__(self, name):
1652
 
        if name == '_pipe':
1653
 
            return super(ProxyClient, self).__getattribute__(name)
1654
 
        self._pipe.send(('getattr', name))
1655
 
        data = self._pipe.recv()
1656
 
        if data[0] == 'data':
1657
 
            return data[1]
1658
 
        if data[0] == 'function':
1659
 
            def func(*args, **kwargs):
1660
 
                self._pipe.send(('funcall', name, args, kwargs))
1661
 
                return self._pipe.recv()[1]
1662
 
            return func
1663
 
    
1664
 
    def __setattr__(self, name, value):
1665
 
        if name == '_pipe':
1666
 
            return super(ProxyClient, self).__setattr__(name, value)
1667
 
        self._pipe.send(('setattr', name, value))
1668
 
 
1669
 
 
1670
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1671
 
    """A class to handle client connections.
1672
 
    
1673
 
    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.
1674
307
    Note: This will run in its own forked process."""
1675
308
    
1676
309
    def handle(self):
1677
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
 
            logger.info("TCP connection from: %s",
1679
 
                        str(self.client_address))
1680
 
            logger.debug("Pipe FD: %d",
1681
 
                         self.server.child_pipe.fileno())
1682
 
            
1683
 
            session = (gnutls.connection
1684
 
                       .ClientSession(self.request,
1685
 
                                      gnutls.connection
1686
 
                                      .X509Credentials()))
1687
 
            
1688
 
            # Note: gnutls.connection.X509Credentials is really a
1689
 
            # generic GnuTLS certificate credentials object so long as
1690
 
            # no X.509 keys are added to it.  Therefore, we can use it
1691
 
            # here despite using OpenPGP certificates.
1692
 
            
1693
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
 
            #                      "+AES-256-CBC", "+SHA1",
1695
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1696
 
            #                      "+DHE-DSS"))
1697
 
            # Use a fallback default, since this MUST be set.
1698
 
            priority = self.server.gnutls_priority
1699
 
            if priority is None:
1700
 
                priority = "NORMAL"
1701
 
            (gnutls.library.functions
1702
 
             .gnutls_priority_set_direct(session._c_object,
1703
 
                                         priority, None))
1704
 
            
1705
 
            # Start communication using the Mandos protocol
1706
 
            # Get protocol number
1707
 
            line = self.request.makefile().readline()
1708
 
            logger.debug("Protocol version: %r", line)
1709
 
            try:
1710
 
                if int(line.strip().split()[0]) > 1:
1711
 
                    raise RuntimeError(line)
1712
 
            except (ValueError, IndexError, RuntimeError) as error:
1713
 
                logger.error("Unknown protocol version: %s", error)
1714
 
                return
1715
 
            
1716
 
            # Start GnuTLS connection
1717
 
            try:
1718
 
                session.handshake()
1719
 
            except gnutls.errors.GNUTLSError as error:
1720
 
                logger.warning("Handshake failed: %s", error)
1721
 
                # Do not run session.bye() here: the session is not
1722
 
                # established.  Just abandon the request.
1723
 
                return
1724
 
            logger.debug("Handshake succeeded")
1725
 
            
1726
 
            approval_required = False
1727
 
            try:
1728
 
                try:
1729
 
                    fpr = self.fingerprint(self.peer_certificate
1730
 
                                           (session))
1731
 
                except (TypeError,
1732
 
                        gnutls.errors.GNUTLSError) as error:
1733
 
                    logger.warning("Bad certificate: %s", error)
1734
 
                    return
1735
 
                logger.debug("Fingerprint: %s", fpr)
1736
 
                
1737
 
                try:
1738
 
                    client = ProxyClient(child_pipe, fpr,
1739
 
                                         self.client_address)
1740
 
                except KeyError:
1741
 
                    return
1742
 
                
1743
 
                if client.approval_delay:
1744
 
                    delay = client.approval_delay
1745
 
                    client.approvals_pending += 1
1746
 
                    approval_required = True
1747
 
                
1748
 
                while True:
1749
 
                    if not client.enabled:
1750
 
                        logger.info("Client %s is disabled",
1751
 
                                       client.name)
1752
 
                        if self.server.use_dbus:
1753
 
                            # Emit D-Bus signal
1754
 
                            client.Rejected("Disabled")
1755
 
                        return
1756
 
                    
1757
 
                    if client.approved or not client.approval_delay:
1758
 
                        #We are approved or approval is disabled
1759
 
                        break
1760
 
                    elif client.approved is None:
1761
 
                        logger.info("Client %s needs approval",
1762
 
                                    client.name)
1763
 
                        if self.server.use_dbus:
1764
 
                            # Emit D-Bus signal
1765
 
                            client.NeedApproval(
1766
 
                                client.approval_delay.total_seconds()
1767
 
                                * 1000, client.approved_by_default)
1768
 
                    else:
1769
 
                        logger.warning("Client %s was not approved",
1770
 
                                       client.name)
1771
 
                        if self.server.use_dbus:
1772
 
                            # Emit D-Bus signal
1773
 
                            client.Rejected("Denied")
1774
 
                        return
1775
 
                    
1776
 
                    #wait until timeout or approved
1777
 
                    time = datetime.datetime.now()
1778
 
                    client.changedstate.acquire()
1779
 
                    client.changedstate.wait(delay.total_seconds())
1780
 
                    client.changedstate.release()
1781
 
                    time2 = datetime.datetime.now()
1782
 
                    if (time2 - time) >= delay:
1783
 
                        if not client.approved_by_default:
1784
 
                            logger.warning("Client %s timed out while"
1785
 
                                           " waiting for approval",
1786
 
                                           client.name)
1787
 
                            if self.server.use_dbus:
1788
 
                                # Emit D-Bus signal
1789
 
                                client.Rejected("Approval timed out")
1790
 
                            return
1791
 
                        else:
1792
 
                            break
1793
 
                    else:
1794
 
                        delay -= time2 - time
1795
 
                
1796
 
                sent_size = 0
1797
 
                while sent_size < len(client.secret):
1798
 
                    try:
1799
 
                        sent = session.send(client.secret[sent_size:])
1800
 
                    except gnutls.errors.GNUTLSError as error:
1801
 
                        logger.warning("gnutls send failed",
1802
 
                                       exc_info=error)
1803
 
                        return
1804
 
                    logger.debug("Sent: %d, remaining: %d",
1805
 
                                 sent, len(client.secret)
1806
 
                                 - (sent_size + sent))
1807
 
                    sent_size += sent
1808
 
                
1809
 
                logger.info("Sending secret to %s", client.name)
1810
 
                # bump the timeout using extended_timeout
1811
 
                client.bump_timeout(client.extended_timeout)
1812
 
                if self.server.use_dbus:
1813
 
                    # Emit D-Bus signal
1814
 
                    client.GotSecret()
1815
 
            
1816
 
            finally:
1817
 
                if approval_required:
1818
 
                    client.approvals_pending -= 1
1819
 
                try:
1820
 
                    session.bye()
1821
 
                except gnutls.errors.GNUTLSError as error:
1822
 
                    logger.warning("GnuTLS bye failed",
1823
 
                                   exc_info=error)
1824
 
    
1825
 
    @staticmethod
1826
 
    def peer_certificate(session):
1827
 
        "Return the peer's OpenPGP certificate as a bytestring"
1828
 
        # If not an OpenPGP certificate...
1829
 
        if (gnutls.library.functions
1830
 
            .gnutls_certificate_type_get(session._c_object)
1831
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1832
 
            # ...do the normal thing
1833
 
            return session.peer_certificate
1834
 
        list_size = ctypes.c_uint(1)
1835
 
        cert_list = (gnutls.library.functions
1836
 
                     .gnutls_certificate_get_peers
1837
 
                     (session._c_object, ctypes.byref(list_size)))
1838
 
        if not bool(cert_list) and list_size.value != 0:
1839
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1840
 
                                            " certificate")
1841
 
        if list_size.value == 0:
1842
 
            return None
1843
 
        cert = cert_list[0]
1844
 
        return ctypes.string_at(cert.data, cert.size)
1845
 
    
1846
 
    @staticmethod
1847
 
    def fingerprint(openpgp):
1848
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1849
 
        # New GnuTLS "datum" with the OpenPGP public key
1850
 
        datum = (gnutls.library.types
1851
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1852
 
                                             ctypes.POINTER
1853
 
                                             (ctypes.c_ubyte)),
1854
 
                                 ctypes.c_uint(len(openpgp))))
1855
 
        # New empty GnuTLS certificate
1856
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1857
 
        (gnutls.library.functions
1858
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1859
 
        # Import the OpenPGP public key into the certificate
1860
 
        (gnutls.library.functions
1861
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1862
 
                                    gnutls.library.constants
1863
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1864
 
        # Verify the self signature in the key
1865
 
        crtverify = ctypes.c_uint()
1866
 
        (gnutls.library.functions
1867
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1868
 
                                         ctypes.byref(crtverify)))
1869
 
        if crtverify.value != 0:
1870
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
 
            raise (gnutls.errors.CertificateSecurityError
1872
 
                   ("Verify failed"))
1873
 
        # New buffer for the fingerprint
1874
 
        buf = ctypes.create_string_buffer(20)
1875
 
        buf_len = ctypes.c_size_t()
1876
 
        # Get the fingerprint from the certificate into the buffer
1877
 
        (gnutls.library.functions
1878
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1879
 
                                             ctypes.byref(buf_len)))
1880
 
        # Deinit the certificate
1881
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1882
 
        # Convert the buffer to a Python bytestring
1883
 
        fpr = ctypes.string_at(buf, buf_len.value)
1884
 
        # Convert the bytestring to hexadecimal notation
1885
 
        hex_fpr = binascii.hexlify(fpr).upper()
1886
 
        return hex_fpr
1887
 
 
1888
 
 
1889
 
class MultiprocessingMixIn(object):
1890
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1891
 
    def sub_process_main(self, request, address):
1892
 
        try:
1893
 
            self.finish_request(request, address)
1894
 
        except Exception:
1895
 
            self.handle_error(request, address)
1896
 
        self.close_request(request)
1897
 
    
1898
 
    def process_request(self, request, address):
1899
 
        """Start a new process to process the request."""
1900
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1901
 
                                       args = (request, address))
1902
 
        proc.start()
1903
 
        return proc
1904
 
 
1905
 
 
1906
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
 
    """ adds a pipe to the MixIn """
1908
 
    def process_request(self, request, client_address):
1909
 
        """Overrides and wraps the original process_request().
1910
 
        
1911
 
        This function creates a new pipe in self.pipe
1912
 
        """
1913
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
 
        
1915
 
        proc = MultiprocessingMixIn.process_request(self, request,
1916
 
                                                    client_address)
1917
 
        self.child_pipe.close()
1918
 
        self.add_pipe(parent_pipe, proc)
1919
 
    
1920
 
    def add_pipe(self, parent_pipe, proc):
1921
 
        """Dummy function; override as necessary"""
1922
 
        raise NotImplementedError()
1923
 
 
1924
 
 
1925
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
 
                     socketserver.TCPServer, object):
1927
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1928
 
    
 
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.
1929
367
    Attributes:
1930
 
        enabled:        Boolean; whether this server is activated yet
1931
 
        interface:      None or a network interface name (string)
1932
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1933
370
    """
1934
 
    def __init__(self, server_address, RequestHandlerClass,
1935
 
                 interface=None, use_ipv6=True, socketfd=None):
1936
 
        """If socketfd is set, use that file descriptor instead of
1937
 
        creating a new one with socket.socket().
1938
 
        """
1939
 
        self.interface = interface
1940
 
        if use_ipv6:
1941
 
            self.address_family = socket.AF_INET6
1942
 
        if socketfd is not None:
1943
 
            # Save the file descriptor
1944
 
            self.socketfd = socketfd
1945
 
            # Save the original socket.socket() function
1946
 
            self.socket_socket = socket.socket
1947
 
            # To implement --socket, we monkey patch socket.socket.
1948
 
            # 
1949
 
            # (When socketserver.TCPServer is a new-style class, we
1950
 
            # could make self.socket into a property instead of monkey
1951
 
            # patching socket.socket.)
1952
 
            # 
1953
 
            # Create a one-time-only replacement for socket.socket()
1954
 
            @functools.wraps(socket.socket)
1955
 
            def socket_wrapper(*args, **kwargs):
1956
 
                # Restore original function so subsequent calls are
1957
 
                # not affected.
1958
 
                socket.socket = self.socket_socket
1959
 
                del self.socket_socket
1960
 
                # This time only, return a new socket object from the
1961
 
                # saved file descriptor.
1962
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1963
 
            # Replace socket.socket() function with wrapper
1964
 
            socket.socket = socket_wrapper
1965
 
        # The socketserver.TCPServer.__init__ will call
1966
 
        # socket.socket(), which might be our replacement,
1967
 
        # socket_wrapper(), if socketfd was set.
1968
 
        socketserver.TCPServer.__init__(self, server_address,
1969
 
                                        RequestHandlerClass)
1970
 
    
 
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)
1971
380
    def server_bind(self):
1972
381
        """This overrides the normal server_bind() function
1973
382
        to bind to an interface if one was specified, and also NOT to
1974
383
        bind to an address or port if they were not specified."""
1975
 
        if self.interface is not None:
1976
 
            if SO_BINDTODEVICE is None:
1977
 
                logger.error("SO_BINDTODEVICE does not exist;"
1978
 
                             " cannot bind to interface %s",
1979
 
                             self.interface)
1980
 
            else:
1981
 
                try:
1982
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1983
 
                                           SO_BINDTODEVICE,
1984
 
                                           (self.interface + "\0")
1985
 
                                           .encode("utf-8"))
1986
 
                except socket.error as error:
1987
 
                    if error.errno == errno.EPERM:
1988
 
                        logger.error("No permission to bind to"
1989
 
                                     " interface %s", self.interface)
1990
 
                    elif error.errno == errno.ENOPROTOOPT:
1991
 
                        logger.error("SO_BINDTODEVICE not available;"
1992
 
                                     " cannot bind to interface %s",
1993
 
                                     self.interface)
1994
 
                    elif error.errno == errno.ENODEV:
1995
 
                        logger.error("Interface %s does not exist,"
1996
 
                                     " cannot bind", self.interface)
1997
 
                    else:
1998
 
                        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
1999
399
        # Only bind(2) the socket if we really need to.
2000
400
        if self.server_address[0] or self.server_address[1]:
2001
401
            if not self.server_address[0]:
2002
 
                if self.address_family == socket.AF_INET6:
2003
 
                    any_address = "::" # in6addr_any
2004
 
                else:
2005
 
                    any_address = "0.0.0.0" # INADDR_ANY
2006
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
2007
404
                                       self.server_address[1])
2008
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
2009
406
                self.server_address = (self.server_address[0],
2010
407
                                       0)
2011
 
#                 if self.interface:
2012
 
#                     self.server_address = (self.server_address[0],
2013
 
#                                            0, # port
2014
 
#                                            0, # flowinfo
2015
 
#                                            if_nametoindex
2016
 
#                                            (self.interface))
2017
 
            return socketserver.TCPServer.server_bind(self)
2018
 
 
2019
 
 
2020
 
class MandosServer(IPv6_TCPServer):
2021
 
    """Mandos server.
2022
 
    
2023
 
    Attributes:
2024
 
        clients:        set of Client objects
2025
 
        gnutls_priority GnuTLS priority string
2026
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2027
 
    
2028
 
    Assumes a gobject.MainLoop event loop.
2029
 
    """
2030
 
    def __init__(self, server_address, RequestHandlerClass,
2031
 
                 interface=None, use_ipv6=True, clients=None,
2032
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2033
 
        self.enabled = False
2034
 
        self.clients = clients
2035
 
        if self.clients is None:
2036
 
            self.clients = {}
2037
 
        self.use_dbus = use_dbus
2038
 
        self.gnutls_priority = gnutls_priority
2039
 
        IPv6_TCPServer.__init__(self, server_address,
2040
 
                                RequestHandlerClass,
2041
 
                                interface = interface,
2042
 
                                use_ipv6 = use_ipv6,
2043
 
                                socketfd = socketfd)
2044
 
    def server_activate(self):
2045
 
        if self.enabled:
2046
 
            return socketserver.TCPServer.server_activate(self)
2047
 
    
2048
 
    def enable(self):
2049
 
        self.enabled = True
2050
 
    
2051
 
    def add_pipe(self, parent_pipe, proc):
2052
 
        # Call "handle_ipc" for both data and EOF events
2053
 
        gobject.io_add_watch(parent_pipe.fileno(),
2054
 
                             gobject.IO_IN | gobject.IO_HUP,
2055
 
                             functools.partial(self.handle_ipc,
2056
 
                                               parent_pipe =
2057
 
                                               parent_pipe,
2058
 
                                               proc = proc))
2059
 
    
2060
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2061
 
                   proc = None, client_object=None):
2062
 
        # error, or the other end of multiprocessing.Pipe has closed
2063
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
 
            # Wait for other process to exit
2065
 
            proc.join()
2066
 
            return False
2067
 
        
2068
 
        # Read a request from the child
2069
 
        request = parent_pipe.recv()
2070
 
        command = request[0]
2071
 
        
2072
 
        if command == 'init':
2073
 
            fpr = request[1]
2074
 
            address = request[2]
2075
 
            
2076
 
            for c in self.clients.itervalues():
2077
 
                if c.fingerprint == fpr:
2078
 
                    client = c
2079
 
                    break
2080
 
            else:
2081
 
                logger.info("Client not found for fingerprint: %s, ad"
2082
 
                            "dress: %s", fpr, address)
2083
 
                if self.use_dbus:
2084
 
                    # Emit D-Bus signal
2085
 
                    mandos_dbus_service.ClientNotFound(fpr,
2086
 
                                                       address[0])
2087
 
                parent_pipe.send(False)
2088
 
                return False
2089
 
            
2090
 
            gobject.io_add_watch(parent_pipe.fileno(),
2091
 
                                 gobject.IO_IN | gobject.IO_HUP,
2092
 
                                 functools.partial(self.handle_ipc,
2093
 
                                                   parent_pipe =
2094
 
                                                   parent_pipe,
2095
 
                                                   proc = proc,
2096
 
                                                   client_object =
2097
 
                                                   client))
2098
 
            parent_pipe.send(True)
2099
 
            # remove the old hook in favor of the new above hook on
2100
 
            # same fileno
2101
 
            return False
2102
 
        if command == 'funcall':
2103
 
            funcname = request[1]
2104
 
            args = request[2]
2105
 
            kwargs = request[3]
2106
 
            
2107
 
            parent_pipe.send(('data', getattr(client_object,
2108
 
                                              funcname)(*args,
2109
 
                                                         **kwargs)))
2110
 
        
2111
 
        if command == 'getattr':
2112
 
            attrname = request[1]
2113
 
            if callable(client_object.__getattribute__(attrname)):
2114
 
                parent_pipe.send(('function',))
2115
 
            else:
2116
 
                parent_pipe.send(('data', client_object
2117
 
                                  .__getattribute__(attrname)))
2118
 
        
2119
 
        if command == 'setattr':
2120
 
            attrname = request[1]
2121
 
            value = request[2]
2122
 
            setattr(client_object, attrname, value)
2123
 
        
2124
 
        return True
2125
 
 
2126
 
 
2127
 
def rfc3339_duration_to_delta(duration):
2128
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
 
    
2130
 
    >>> rfc3339_duration_to_delta("P7D")
2131
 
    datetime.timedelta(7)
2132
 
    >>> rfc3339_duration_to_delta("PT60S")
2133
 
    datetime.timedelta(0, 60)
2134
 
    >>> rfc3339_duration_to_delta("PT60M")
2135
 
    datetime.timedelta(0, 3600)
2136
 
    >>> rfc3339_duration_to_delta("PT24H")
2137
 
    datetime.timedelta(1)
2138
 
    >>> rfc3339_duration_to_delta("P1W")
2139
 
    datetime.timedelta(7)
2140
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2141
 
    datetime.timedelta(0, 330)
2142
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2143
 
    datetime.timedelta(1, 200)
2144
 
    """
2145
 
    
2146
 
    # Parsing an RFC 3339 duration with regular expressions is not
2147
 
    # possible - there would have to be multiple places for the same
2148
 
    # values, like seconds.  The current code, while more esoteric, is
2149
 
    # cleaner without depending on a parsing library.  If Python had a
2150
 
    # built-in library for parsing we would use it, but we'd like to
2151
 
    # avoid excessive use of external libraries.
2152
 
    
2153
 
    # New type for defining tokens, syntax, and semantics all-in-one
2154
 
    Token = collections.namedtuple("Token",
2155
 
                                   ("regexp", # To match token; if
2156
 
                                              # "value" is not None,
2157
 
                                              # must have a "group"
2158
 
                                              # containing digits
2159
 
                                    "value",  # datetime.timedelta or
2160
 
                                              # None
2161
 
                                    "followers")) # Tokens valid after
2162
 
                                                  # this token
2163
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2165
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2166
 
    token_second = Token(re.compile(r"(\d+)S"),
2167
 
                         datetime.timedelta(seconds=1),
2168
 
                         frozenset((token_end,)))
2169
 
    token_minute = Token(re.compile(r"(\d+)M"),
2170
 
                         datetime.timedelta(minutes=1),
2171
 
                         frozenset((token_second, token_end)))
2172
 
    token_hour = Token(re.compile(r"(\d+)H"),
2173
 
                       datetime.timedelta(hours=1),
2174
 
                       frozenset((token_minute, token_end)))
2175
 
    token_time = Token(re.compile(r"T"),
2176
 
                       None,
2177
 
                       frozenset((token_hour, token_minute,
2178
 
                                  token_second)))
2179
 
    token_day = Token(re.compile(r"(\d+)D"),
2180
 
                      datetime.timedelta(days=1),
2181
 
                      frozenset((token_time, token_end)))
2182
 
    token_month = Token(re.compile(r"(\d+)M"),
2183
 
                        datetime.timedelta(weeks=4),
2184
 
                        frozenset((token_day, token_end)))
2185
 
    token_year = Token(re.compile(r"(\d+)Y"),
2186
 
                       datetime.timedelta(weeks=52),
2187
 
                       frozenset((token_month, token_end)))
2188
 
    token_week = Token(re.compile(r"(\d+)W"),
2189
 
                       datetime.timedelta(weeks=1),
2190
 
                       frozenset((token_end,)))
2191
 
    token_duration = Token(re.compile(r"P"), None,
2192
 
                           frozenset((token_year, token_month,
2193
 
                                      token_day, token_time,
2194
 
                                      token_week)))
2195
 
    # Define starting values
2196
 
    value = datetime.timedelta() # Value so far
2197
 
    found_token = None
2198
 
    followers = frozenset((token_duration,)) # Following valid tokens
2199
 
    s = duration                # String left to parse
2200
 
    # Loop until end token is found
2201
 
    while found_token is not token_end:
2202
 
        # Search for any currently valid tokens
2203
 
        for token in followers:
2204
 
            match = token.regexp.match(s)
2205
 
            if match is not None:
2206
 
                # Token found
2207
 
                if token.value is not None:
2208
 
                    # Value found, parse digits
2209
 
                    factor = int(match.group(1), 10)
2210
 
                    # Add to value so far
2211
 
                    value += factor * token.value
2212
 
                # Strip token from string
2213
 
                s = token.regexp.sub("", s, 1)
2214
 
                # Go to found token
2215
 
                found_token = token
2216
 
                # Set valid next tokens
2217
 
                followers = found_token.followers
2218
 
                break
2219
 
        else:
2220
 
            # No currently valid tokens were found
2221
 
            raise ValueError("Invalid RFC 3339 duration")
2222
 
    # End token found
2223
 
    return value
 
408
            return super(type(self), self).server_bind()
2224
409
 
2225
410
 
2226
411
def string_to_delta(interval):
2227
412
    """Parse a string and return a datetime.timedelta
2228
 
    
 
413
 
2229
414
    >>> string_to_delta('7d')
2230
415
    datetime.timedelta(7)
2231
416
    >>> string_to_delta('60s')
2234
419
    datetime.timedelta(0, 3600)
2235
420
    >>> string_to_delta('24h')
2236
421
    datetime.timedelta(1)
2237
 
    >>> string_to_delta('1w')
 
422
    >>> string_to_delta(u'1w')
2238
423
    datetime.timedelta(7)
2239
 
    >>> string_to_delta('5m 30s')
2240
 
    datetime.timedelta(0, 330)
2241
424
    """
2242
 
    
2243
 
    try:
2244
 
        return rfc3339_duration_to_delta(interval)
2245
 
    except ValueError:
2246
 
        pass
2247
 
    
2248
 
    timevalue = datetime.timedelta(0)
2249
 
    for s in interval.split():
2250
 
        try:
2251
 
            suffix = s[-1]
2252
 
            value = int(s[:-1])
2253
 
            if suffix == "d":
2254
 
                delta = datetime.timedelta(value)
2255
 
            elif suffix == "s":
2256
 
                delta = datetime.timedelta(0, value)
2257
 
            elif suffix == "m":
2258
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2259
 
            elif suffix == "h":
2260
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2261
 
            elif suffix == "w":
2262
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
 
            else:
2264
 
                raise ValueError("Unknown suffix {!r}"
2265
 
                                 .format(suffix))
2266
 
        except IndexError as e:
2267
 
            raise ValueError(*(e.args))
2268
 
        timevalue += delta
2269
 
    return timevalue
2270
 
 
2271
 
 
2272
 
def daemon(nochdir = False, noclose = False):
2273
 
    """See daemon(3).  Standard BSD Unix function.
2274
 
    
2275
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2276
 
    if os.fork():
2277
 
        sys.exit()
2278
 
    os.setsid()
2279
 
    if not nochdir:
2280
 
        os.chdir("/")
2281
 
    if os.fork():
2282
 
        sys.exit()
2283
 
    if not noclose:
2284
 
        # Close all standard open file descriptors
2285
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2286
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
 
            raise OSError(errno.ENODEV, "{} not a character device"
2288
 
                          .format(os.devnull))
2289
 
        os.dup2(null, sys.stdin.fileno())
2290
 
        os.dup2(null, sys.stdout.fileno())
2291
 
        os.dup2(null, sys.stderr.fileno())
2292
 
        if null > 2:
2293
 
            os.close(null)
2294
 
 
2295
 
 
2296
 
def main():
2297
 
    
2298
 
    ##################################################################
2299
 
    # Parsing of options, both command line and config file
2300
 
    
2301
 
    parser = argparse.ArgumentParser()
2302
 
    parser.add_argument("-v", "--version", action="version",
2303
 
                        version = "%(prog)s {}".format(version),
2304
 
                        help="show version number and exit")
2305
 
    parser.add_argument("-i", "--interface", metavar="IF",
2306
 
                        help="Bind to interface IF")
2307
 
    parser.add_argument("-a", "--address",
2308
 
                        help="Address to listen for requests on")
2309
 
    parser.add_argument("-p", "--port", type=int,
2310
 
                        help="Port number to receive requests on")
2311
 
    parser.add_argument("--check", action="store_true",
2312
 
                        help="Run self-test")
2313
 
    parser.add_argument("--debug", action="store_true",
2314
 
                        help="Debug mode; run in foreground and log"
2315
 
                        " to terminal", default=None)
2316
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2317
 
                        help="Debug level for stdout output")
2318
 
    parser.add_argument("--priority", help="GnuTLS"
2319
 
                        " priority string (see GnuTLS documentation)")
2320
 
    parser.add_argument("--servicename",
2321
 
                        metavar="NAME", help="Zeroconf service name")
2322
 
    parser.add_argument("--configdir",
2323
 
                        default="/etc/mandos", metavar="DIR",
2324
 
                        help="Directory to search for configuration"
2325
 
                        " files")
2326
 
    parser.add_argument("--no-dbus", action="store_false",
2327
 
                        dest="use_dbus", help="Do not provide D-Bus"
2328
 
                        " system bus interface", default=None)
2329
 
    parser.add_argument("--no-ipv6", action="store_false",
2330
 
                        dest="use_ipv6", help="Do not use IPv6",
2331
 
                        default=None)
2332
 
    parser.add_argument("--no-restore", action="store_false",
2333
 
                        dest="restore", help="Do not restore stored"
2334
 
                        " state", default=None)
2335
 
    parser.add_argument("--socket", type=int,
2336
 
                        help="Specify a file descriptor to a network"
2337
 
                        " socket to use instead of creating one")
2338
 
    parser.add_argument("--statedir", metavar="DIR",
2339
 
                        help="Directory to save/restore state in")
2340
 
    parser.add_argument("--foreground", action="store_true",
2341
 
                        help="Run in foreground", default=None)
2342
 
    parser.add_argument("--no-zeroconf", action="store_false",
2343
 
                        dest="zeroconf", help="Do not use Zeroconf",
2344
 
                        default=None)
2345
 
    
2346
 
    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()
2347
566
    
2348
567
    if options.check:
2349
568
        import doctest
2350
 
        fail_count, test_count = doctest.testmod()
2351
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2352
 
    
2353
 
    # Default values for config file for server-global settings
2354
 
    server_defaults = { "interface": "",
2355
 
                        "address": "",
2356
 
                        "port": "",
2357
 
                        "debug": "False",
2358
 
                        "priority":
2359
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2360
 
                        ":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2361
 
                        "servicename": "Mandos",
2362
 
                        "use_dbus": "True",
2363
 
                        "use_ipv6": "True",
2364
 
                        "debuglevel": "",
2365
 
                        "restore": "True",
2366
 
                        "socket": "",
2367
 
                        "statedir": "/var/lib/mandos",
2368
 
                        "foreground": "False",
2369
 
                        "zeroconf": "True",
2370
 
                        }
2371
 
    
2372
 
    # Parse config file for server-global settings
2373
 
    server_config = configparser.SafeConfigParser(server_defaults)
2374
 
    del server_defaults
2375
 
    server_config.read(os.path.join(options.configdir,
2376
 
                                    "mandos.conf"))
2377
 
    # Convert the SafeConfigParser object to a dict
2378
 
    server_settings = server_config.defaults()
2379
 
    # Use the appropriate methods on the non-string config options
2380
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2381
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2382
 
                                                           option)
2383
 
    if server_settings["port"]:
2384
 
        server_settings["port"] = server_config.getint("DEFAULT",
2385
 
                                                       "port")
2386
 
    if server_settings["socket"]:
2387
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2388
 
                                                         "socket")
2389
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2390
 
        # over with an opened os.devnull.  But we don't want this to
2391
 
        # happen with a supplied network socket.
2392
 
        if 0 <= server_settings["socket"] <= 2:
2393
 
            server_settings["socket"] = os.dup(server_settings
2394
 
                                               ["socket"])
2395
 
    del server_config
2396
 
    
2397
 
    # Override the settings from the config file with command line
2398
 
    # options, if set.
2399
 
    for option in ("interface", "address", "port", "debug",
2400
 
                   "priority", "servicename", "configdir",
2401
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2402
 
                   "statedir", "socket", "foreground", "zeroconf"):
2403
 
        value = getattr(options, option)
2404
 
        if value is not None:
2405
 
            server_settings[option] = value
2406
 
    del options
2407
 
    # Force all strings to be unicode
2408
 
    for option in server_settings.keys():
2409
 
        if isinstance(server_settings[option], bytes):
2410
 
            server_settings[option] = (server_settings[option]
2411
 
                                       .decode("utf-8"))
2412
 
    # Force all boolean options to be boolean
2413
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2414
 
                   "foreground", "zeroconf"):
2415
 
        server_settings[option] = bool(server_settings[option])
2416
 
    # Debug implies foreground
2417
 
    if server_settings["debug"]:
2418
 
        server_settings["foreground"] = True
2419
 
    # Now we have our good server settings in "server_settings"
2420
 
    
2421
 
    ##################################################################
2422
 
    
2423
 
    if (not server_settings["zeroconf"] and
2424
 
        not (server_settings["port"]
2425
 
             or server_settings["socket"] != "")):
2426
 
            parser.error("Needs port or socket to work without"
2427
 
                         " Zeroconf")
2428
 
    
2429
 
    # For convenience
2430
 
    debug = server_settings["debug"]
2431
 
    debuglevel = server_settings["debuglevel"]
2432
 
    use_dbus = server_settings["use_dbus"]
2433
 
    use_ipv6 = server_settings["use_ipv6"]
2434
 
    stored_state_path = os.path.join(server_settings["statedir"],
2435
 
                                     stored_state_file)
2436
 
    foreground = server_settings["foreground"]
2437
 
    zeroconf = server_settings["zeroconf"]
2438
 
    
2439
 
    if debug:
2440
 
        initlogger(debug, logging.DEBUG)
2441
 
    else:
2442
 
        if not debuglevel:
2443
 
            initlogger(debug)
2444
 
        else:
2445
 
            level = getattr(logging, debuglevel.upper())
2446
 
            initlogger(debug, level)
2447
 
    
2448
 
    if server_settings["servicename"] != "Mandos":
2449
 
        syslogger.setFormatter(logging.Formatter
2450
 
                               ('Mandos ({}) [%(process)d]:'
2451
 
                                ' %(levelname)s: %(message)s'
2452
 
                                .format(server_settings
2453
 
                                        ["servicename"])))
2454
 
    
2455
 
    # Parse config file with clients
2456
 
    client_config = configparser.SafeConfigParser(Client
2457
 
                                                  .client_defaults)
2458
 
    client_config.read(os.path.join(server_settings["configdir"],
2459
 
                                    "clients.conf"))
2460
 
    
2461
 
    global mandos_dbus_service
2462
 
    mandos_dbus_service = None
2463
 
    
2464
 
    socketfd = None
2465
 
    if server_settings["socket"] != "":
2466
 
        socketfd = server_settings["socket"]
2467
 
    tcp_server = MandosServer((server_settings["address"],
2468
 
                               server_settings["port"]),
2469
 
                              ClientHandler,
2470
 
                              interface=(server_settings["interface"]
2471
 
                                         or None),
2472
 
                              use_ipv6=use_ipv6,
2473
 
                              gnutls_priority=
2474
 
                              server_settings["priority"],
2475
 
                              use_dbus=use_dbus,
2476
 
                              socketfd=socketfd)
2477
 
    if not foreground:
2478
 
        pidfilename = "/run/mandos.pid"
2479
 
        if not os.path.isdir("/run/."):
2480
 
            pidfilename = "/var/run/mandos.pid"
2481
 
        pidfile = None
2482
 
        try:
2483
 
            pidfile = open(pidfilename, "w")
2484
 
        except IOError as e:
2485
 
            logger.error("Could not open file %r", pidfilename,
2486
 
                         exc_info=e)
2487
 
    
2488
 
    for name in ("_mandos", "mandos", "nobody"):
2489
 
        try:
2490
 
            uid = pwd.getpwnam(name).pw_uid
2491
 
            gid = pwd.getpwnam(name).pw_gid
2492
 
            break
2493
 
        except KeyError:
2494
 
            continue
2495
 
    else:
2496
 
        uid = 65534
2497
 
        gid = 65534
2498
 
    try:
2499
 
        os.setgid(gid)
2500
 
        os.setuid(uid)
2501
 
    except OSError as error:
2502
 
        if error.errno != errno.EPERM:
2503
 
            raise
2504
 
    
2505
 
    if debug:
2506
 
        # Enable all possible GnuTLS debugging
2507
 
        
2508
 
        # "Use a log level over 10 to enable all debugging options."
2509
 
        # - GnuTLS manual
2510
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2511
 
        
2512
 
        @gnutls.library.types.gnutls_log_func
2513
 
        def debug_gnutls(level, string):
2514
 
            logger.debug("GnuTLS: %s", string[:-1])
2515
 
        
2516
 
        (gnutls.library.functions
2517
 
         .gnutls_global_set_log_function(debug_gnutls))
2518
 
        
2519
 
        # Redirect stdin so all checkers get /dev/null
2520
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2521
 
        os.dup2(null, sys.stdin.fileno())
2522
 
        if null > 2:
2523
 
            os.close(null)
2524
 
    
2525
 
    # Need to fork before connecting to D-Bus
2526
 
    if not foreground:
2527
 
        # Close all input and output, do double fork, etc.
2528
 
        daemon()
2529
 
    
2530
 
    # multiprocessing will use threads, so before we use gobject we
2531
 
    # need to inform gobject that threads will be used.
2532
 
    gobject.threads_init()
2533
 
    
2534
 
    global main_loop
2535
 
    # From the Avahi example code
2536
 
    DBusGMainLoop(set_as_default=True)
 
569
        doctest.testmod()
 
570
        sys.exit()
 
571
    
 
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 )
2537
590
    main_loop = gobject.MainLoop()
2538
591
    bus = dbus.SystemBus()
2539
 
    # End of Avahi example code
2540
 
    if use_dbus:
2541
 
        try:
2542
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2543
 
                                            bus, do_not_queue=True)
2544
 
            old_bus_name = (dbus.service.BusName
2545
 
                            ("se.bsnet.fukt.Mandos", bus,
2546
 
                             do_not_queue=True))
2547
 
        except dbus.exceptions.NameExistsException as e:
2548
 
            logger.error("Disabling D-Bus:", exc_info=e)
2549
 
            use_dbus = False
2550
 
            server_settings["use_dbus"] = False
2551
 
            tcp_server.use_dbus = False
2552
 
    if zeroconf:
2553
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2554
 
        service = AvahiServiceToSyslog(name =
2555
 
                                       server_settings["servicename"],
2556
 
                                       servicetype = "_mandos._tcp",
2557
 
                                       protocol = protocol, bus = bus)
2558
 
        if server_settings["interface"]:
2559
 
            service.interface = (if_nametoindex
2560
 
                                 (server_settings["interface"]
2561
 
                                  .encode("utf-8")))
2562
 
    
2563
 
    global multiprocessing_manager
2564
 
    multiprocessing_manager = multiprocessing.Manager()
2565
 
    
2566
 
    client_class = Client
2567
 
    if use_dbus:
2568
 
        client_class = functools.partial(ClientDBus, bus = bus)
2569
 
    
2570
 
    client_settings = Client.config_parser(client_config)
2571
 
    old_client_settings = {}
2572
 
    clients_data = {}
2573
 
    
2574
 
    # This is used to redirect stdout and stderr for checker processes
2575
 
    global wnull
2576
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2577
 
    # Only used if server is running in foreground but not in debug
2578
 
    # mode
2579
 
    if debug or not foreground:
2580
 
        wnull.close()
2581
 
    
2582
 
    # Get client data and settings from last running state.
2583
 
    if server_settings["restore"]:
2584
 
        try:
2585
 
            with open(stored_state_path, "rb") as stored_state:
2586
 
                clients_data, old_client_settings = (pickle.load
2587
 
                                                     (stored_state))
2588
 
            os.remove(stored_state_path)
2589
 
        except IOError as e:
2590
 
            if e.errno == errno.ENOENT:
2591
 
                logger.warning("Could not load persistent state: {}"
2592
 
                                .format(os.strerror(e.errno)))
2593
 
            else:
2594
 
                logger.critical("Could not load persistent state:",
2595
 
                                exc_info=e)
2596
 
                raise
2597
 
        except EOFError as e:
2598
 
            logger.warning("Could not load persistent state: "
2599
 
                           "EOFError:", exc_info=e)
2600
 
    
2601
 
    with PGPEngine() as pgp:
2602
 
        for client_name, client in clients_data.items():
2603
 
            # Skip removed clients
2604
 
            if client_name not in client_settings:
2605
 
                continue
2606
 
            
2607
 
            # Decide which value to use after restoring saved state.
2608
 
            # We have three different values: Old config file,
2609
 
            # new config file, and saved state.
2610
 
            # New config value takes precedence if it differs from old
2611
 
            # config value, otherwise use saved state.
2612
 
            for name, value in client_settings[client_name].items():
2613
 
                try:
2614
 
                    # For each value in new config, check if it
2615
 
                    # differs from the old config value (Except for
2616
 
                    # the "secret" attribute)
2617
 
                    if (name != "secret" and
2618
 
                        value != old_client_settings[client_name]
2619
 
                        [name]):
2620
 
                        client[name] = value
2621
 
                except KeyError:
2622
 
                    pass
2623
 
            
2624
 
            # Clients who has passed its expire date can still be
2625
 
            # enabled if its last checker was successful.  Clients
2626
 
            # whose checker succeeded before we stored its state is
2627
 
            # assumed to have successfully run all checkers during
2628
 
            # downtime.
2629
 
            if client["enabled"]:
2630
 
                if datetime.datetime.utcnow() >= client["expires"]:
2631
 
                    if not client["last_checked_ok"]:
2632
 
                        logger.warning(
2633
 
                            "disabling client {} - Client never "
2634
 
                            "performed a successful checker"
2635
 
                            .format(client_name))
2636
 
                        client["enabled"] = False
2637
 
                    elif client["last_checker_status"] != 0:
2638
 
                        logger.warning(
2639
 
                            "disabling client {} - Client last"
2640
 
                            " checker failed with error code {}"
2641
 
                            .format(client_name,
2642
 
                                    client["last_checker_status"]))
2643
 
                        client["enabled"] = False
2644
 
                    else:
2645
 
                        client["expires"] = (datetime.datetime
2646
 
                                             .utcnow()
2647
 
                                             + client["timeout"])
2648
 
                        logger.debug("Last checker succeeded,"
2649
 
                                     " keeping {} enabled"
2650
 
                                     .format(client_name))
2651
 
            try:
2652
 
                client["secret"] = (
2653
 
                    pgp.decrypt(client["encrypted_secret"],
2654
 
                                client_settings[client_name]
2655
 
                                ["secret"]))
2656
 
            except PGPError:
2657
 
                # If decryption fails, we use secret from new settings
2658
 
                logger.debug("Failed to decrypt {} old secret"
2659
 
                             .format(client_name))
2660
 
                client["secret"] = (
2661
 
                    client_settings[client_name]["secret"])
2662
 
    
2663
 
    # Add/remove clients based on new changes made to config
2664
 
    for client_name in (set(old_client_settings)
2665
 
                        - set(client_settings)):
2666
 
        del clients_data[client_name]
2667
 
    for client_name in (set(client_settings)
2668
 
                        - set(old_client_settings)):
2669
 
        clients_data[client_name] = client_settings[client_name]
2670
 
    
2671
 
    # Create all client objects
2672
 
    for client_name, client in clients_data.items():
2673
 
        tcp_server.clients[client_name] = client_class(
2674
 
            name = client_name, settings = client,
2675
 
            server_settings = server_settings)
2676
 
    
2677
 
    if not tcp_server.clients:
2678
 
        logger.warning("No clients defined")
2679
 
    
2680
 
    if not foreground:
2681
 
        if pidfile is not None:
2682
 
            try:
2683
 
                with pidfile:
2684
 
                    pid = os.getpid()
2685
 
                    pidfile.write("{}\n".format(pid).encode("utf-8"))
2686
 
            except IOError:
2687
 
                logger.error("Could not write to file %r with PID %d",
2688
 
                             pidfilename, pid)
2689
 
        del pidfile
2690
 
        del pidfilename
2691
 
    
2692
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2693
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2694
 
    
2695
 
    if use_dbus:
2696
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2697
 
                                        "se.bsnet.fukt.Mandos"})
2698
 
        class MandosDBusService(DBusObjectWithProperties):
2699
 
            """A D-Bus proxy object"""
2700
 
            def __init__(self):
2701
 
                dbus.service.Object.__init__(self, bus, "/")
2702
 
            _interface = "se.recompile.Mandos"
2703
 
            
2704
 
            @dbus_interface_annotations(_interface)
2705
 
            def _foo(self):
2706
 
                return { "org.freedesktop.DBus.Property"
2707
 
                         ".EmitsChangedSignal":
2708
 
                             "false"}
2709
 
            
2710
 
            @dbus.service.signal(_interface, signature="o")
2711
 
            def ClientAdded(self, objpath):
2712
 
                "D-Bus signal"
2713
 
                pass
2714
 
            
2715
 
            @dbus.service.signal(_interface, signature="ss")
2716
 
            def ClientNotFound(self, fingerprint, address):
2717
 
                "D-Bus signal"
2718
 
                pass
2719
 
            
2720
 
            @dbus.service.signal(_interface, signature="os")
2721
 
            def ClientRemoved(self, objpath, name):
2722
 
                "D-Bus signal"
2723
 
                pass
2724
 
            
2725
 
            @dbus.service.method(_interface, out_signature="ao")
2726
 
            def GetAllClients(self):
2727
 
                "D-Bus method"
2728
 
                return dbus.Array(c.dbus_object_path
2729
 
                                  for c in
2730
 
                                  tcp_server.clients.itervalues())
2731
 
            
2732
 
            @dbus.service.method(_interface,
2733
 
                                 out_signature="a{oa{sv}}")
2734
 
            def GetAllClientsWithProperties(self):
2735
 
                "D-Bus method"
2736
 
                return dbus.Dictionary(
2737
 
                    { c.dbus_object_path: c.GetAll("")
2738
 
                      for c in tcp_server.clients.itervalues() },
2739
 
                    signature="oa{sv}")
2740
 
            
2741
 
            @dbus.service.method(_interface, in_signature="o")
2742
 
            def RemoveClient(self, object_path):
2743
 
                "D-Bus method"
2744
 
                for c in tcp_server.clients.itervalues():
2745
 
                    if c.dbus_object_path == object_path:
2746
 
                        del tcp_server.clients[c.name]
2747
 
                        c.remove_from_connection()
2748
 
                        # Don't signal anything except ClientRemoved
2749
 
                        c.disable(quiet=True)
2750
 
                        # Emit D-Bus signal
2751
 
                        self.ClientRemoved(object_path, c.name)
2752
 
                        return
2753
 
                raise KeyError(object_path)
2754
 
            
2755
 
            del _interface
2756
 
        
2757
 
        mandos_dbus_service = MandosDBusService()
2758
 
    
2759
 
    def cleanup():
2760
 
        "Cleanup function; run on exit"
2761
 
        if zeroconf:
2762
 
            service.cleanup()
2763
 
        
2764
 
        multiprocessing.active_children()
2765
 
        wnull.close()
2766
 
        if not (tcp_server.clients or client_settings):
2767
 
            return
2768
 
        
2769
 
        # Store client before exiting. Secrets are encrypted with key
2770
 
        # based on what config file has. If config file is
2771
 
        # removed/edited, old secret will thus be unrecovable.
2772
 
        clients = {}
2773
 
        with PGPEngine() as pgp:
2774
 
            for client in tcp_server.clients.itervalues():
2775
 
                key = client_settings[client.name]["secret"]
2776
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2777
 
                                                      key)
2778
 
                client_dict = {}
2779
 
                
2780
 
                # A list of attributes that can not be pickled
2781
 
                # + secret.
2782
 
                exclude = { "bus", "changedstate", "secret",
2783
 
                            "checker", "server_settings" }
2784
 
                for name, typ in (inspect.getmembers
2785
 
                                  (dbus.service.Object)):
2786
 
                    exclude.add(name)
2787
 
                
2788
 
                client_dict["encrypted_secret"] = (client
2789
 
                                                   .encrypted_secret)
2790
 
                for attr in client.client_structure:
2791
 
                    if attr not in exclude:
2792
 
                        client_dict[attr] = getattr(client, attr)
2793
 
                
2794
 
                clients[client.name] = client_dict
2795
 
                del client_settings[client.name]["secret"]
2796
 
        
2797
 
        try:
2798
 
            with (tempfile.NamedTemporaryFile
2799
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2800
 
                   dir=os.path.dirname(stored_state_path),
2801
 
                   delete=False)) as stored_state:
2802
 
                pickle.dump((clients, client_settings), stored_state)
2803
 
                tempname=stored_state.name
2804
 
            os.rename(tempname, stored_state_path)
2805
 
        except (IOError, OSError) as e:
2806
 
            if not debug:
2807
 
                try:
2808
 
                    os.remove(tempname)
2809
 
                except NameError:
2810
 
                    pass
2811
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2812
 
                logger.warning("Could not save persistent state: {}"
2813
 
                               .format(os.strerror(e.errno)))
2814
 
            else:
2815
 
                logger.warning("Could not save persistent state:",
2816
 
                               exc_info=e)
2817
 
                raise
2818
 
        
2819
 
        # Delete all clients, and settings from config
2820
 
        while tcp_server.clients:
2821
 
            name, client = tcp_server.clients.popitem()
2822
 
            if use_dbus:
2823
 
                client.remove_from_connection()
2824
 
            # Don't signal anything except ClientRemoved
2825
 
            client.disable(quiet=True)
2826
 
            if use_dbus:
2827
 
                # Emit D-Bus signal
2828
 
                mandos_dbus_service.ClientRemoved(client
2829
 
                                                  .dbus_object_path,
2830
 
                                                  client.name)
2831
 
        client_settings.clear()
2832
 
    
2833
 
    atexit.register(cleanup)
2834
 
    
2835
 
    for client in tcp_server.clients.itervalues():
2836
 
        if use_dbus:
2837
 
            # Emit D-Bus signal
2838
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2839
 
        # Need to initiate checking of clients
2840
 
        if client.enabled:
2841
 
            client.init_checker()
2842
 
    
2843
 
    tcp_server.enable()
2844
 
    tcp_server.server_activate()
2845
 
    
2846
 
    # Find out what port we got
2847
 
    if zeroconf:
2848
 
        service.port = tcp_server.socket.getsockname()[1]
2849
 
    if use_ipv6:
2850
 
        logger.info("Now listening on address %r, port %d,"
2851
 
                    " flowinfo %d, scope_id %d",
2852
 
                    *tcp_server.socket.getsockname())
2853
 
    else:                       # IPv4
2854
 
        logger.info("Now listening on address %r, port %d",
2855
 
                    *tcp_server.socket.getsockname())
2856
 
    
2857
 
    #service.interface = tcp_server.socket.getsockname()[3]
2858
 
    
 
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)
2859
634
    try:
2860
 
        if zeroconf:
2861
 
            # From the Avahi example code
2862
 
            try:
2863
 
                service.activate()
2864
 
            except dbus.exceptions.DBusException as error:
2865
 
                logger.critical("D-Bus Exception", exc_info=error)
2866
 
                cleanup()
2867
 
                sys.exit(1)
2868
 
            # End of Avahi example code
2869
 
        
2870
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2871
 
                             lambda *args, **kwargs:
2872
 
                             (tcp_server.handle_request
2873
 
                              (*args[2:], **kwargs) or True))
2874
 
        
2875
 
        logger.debug("Starting main loop")
2876
635
        main_loop.run()
2877
 
    except AvahiError as error:
2878
 
        logger.critical("Avahi Error", exc_info=error)
2879
 
        cleanup()
2880
 
        sys.exit(1)
2881
636
    except KeyboardInterrupt:
2882
 
        if debug:
2883
 
            print("", file=sys.stderr)
2884
 
        logger.debug("Server received KeyboardInterrupt")
2885
 
    logger.debug("Server exiting")
2886
 
    # Must run before the D-Bus bus name gets deregistered
2887
 
    cleanup()
 
637
        print
 
638
    
 
639
    # Cleanup here
2888
640
 
2889
 
if __name__ == '__main__':
2890
 
    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()