/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-18 00:16:57 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090118001657-6mo3ae73ldy5tegf
* debian/mandos-client.postinst: Converted to Bourne shell.  Also
                                 minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell.  Also minor
                          message change.
* debian/mandos.prerm: Minor message change.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
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# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
# 
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
#     GNU General Public License for more details.
25
26
# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
 
69
version = "1.0.5"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
 
syslogger.setFormatter(logging.Formatter\
69
 
                        ('%(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
70
77
logger.addHandler(syslogger)
71
 
del syslogger
72
78
 
 
79
console = logging.StreamHandler()
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
81
                                       ' %(message)s'))
 
82
logger.addHandler(console)
73
83
 
74
84
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
85
    def __init__(self, value, *args, **kwargs):
76
86
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
87
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
88
    def __unicode__(self):
 
89
        return unicode(repr(self.value))
79
90
 
80
91
class AvahiServiceError(AvahiError):
81
92
    pass
101
112
                  a sensible number of times
102
113
    """
103
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 12):
 
115
                 servicetype = None, port = None, TXT = None,
 
116
                 domain = "", host = "", max_renames = 32768):
106
117
        self.interface = interface
107
118
        self.name = name
108
 
        self.type = type
 
119
        self.type = servicetype
109
120
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
121
        self.TXT = TXT if TXT is not None else []
114
122
        self.domain = domain
115
123
        self.host = host
116
124
        self.rename_count = 0
 
125
        self.max_renames = max_renames
117
126
    def rename(self):
118
127
        """Derived from the Avahi example code"""
119
128
        if self.rename_count >= self.max_renames:
120
 
            logger.critical(u"No suitable service name found after %i"
121
 
                            u" retries, exiting.", rename_count)
122
 
            raise AvahiServiceError("Too many renames")
123
 
        name = server.GetAlternativeServiceName(name)
124
 
        logger.error(u"Changing name to %r ...", name)
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
 
131
                            self.rename_count)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
125
139
        self.remove()
126
140
        self.add()
127
141
        self.rename_count += 1
133
147
        """Derived from the Avahi example code"""
134
148
        global group
135
149
        if group is None:
136
 
            group = dbus.Interface\
137
 
                    (bus.get_object(avahi.DBUS_NAME,
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
138
152
                                    server.EntryGroupNew()),
139
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
154
            group.connect_to_signal('StateChanged',
141
155
                                    entry_group_state_changed)
142
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
143
157
                     service.name, service.type)
144
158
        group.AddService(
145
159
                self.interface,         # interface
156
170
# End of Avahi example code
157
171
 
158
172
 
159
 
class Client(object):
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
160
179
    """A representation of a client host served by this server.
161
180
    Attributes:
162
 
    name:      string; from the config file, used in log messages
 
181
    name:       string; from the config file, used in log messages
163
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
164
183
                 uniquely identify the client
165
 
    secret:    bytestring; sent verbatim (over TLS) to client
166
 
    fqdn:      string (FQDN); available for use by the checker command
167
 
    created:   datetime.datetime(); object creation, not client host
168
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
169
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
170
 
                                     until this client is invalid
171
 
    interval:  datetime.timedelta(); How often to start a new checker
172
 
    stop_hook: If set, called by stop() as stop_hook(self)
173
 
    checker:   subprocess.Popen(); a running checker process used
174
 
                                   to see if the client lives.
175
 
                                   'None' if no process is running.
 
184
    secret:     bytestring; sent verbatim (over TLS) to client
 
185
    host:       string; available for use by the checker command
 
186
    created:    datetime.datetime(); (UTC) object creation
 
187
    last_enabled: datetime.datetime(); (UTC)
 
188
    enabled:    bool()
 
189
    last_checked_ok: datetime.datetime(); (UTC) or None
 
190
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
191
                                      until this client is invalid
 
192
    interval:   datetime.timedelta(); How often to start a new checker
 
193
    disable_hook:  If set, called by disable() as disable_hook(self)
 
194
    checker:    subprocess.Popen(); a running checker process used
 
195
                                    to see if the client lives.
 
196
                                    'None' if no process is running.
176
197
    checker_initiator_tag: a gobject event source tag, or None
177
 
    stop_initiator_tag:    - '' -
 
198
    disable_initiator_tag:    - '' -
178
199
    checker_callback_tag:  - '' -
179
200
    checker_command: string; External command which is run to check if
180
201
                     client lives.  %() expansions are done at
181
202
                     runtime with vars(self) as dict, so that for
182
203
                     instance %(name)s can be used in the command.
183
 
    Private attibutes:
184
 
    _timeout: Real variable for 'timeout'
185
 
    _interval: Real variable for 'interval'
186
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
187
 
    _interval_milliseconds: - '' -
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
188
206
    """
189
 
    def _set_timeout(self, timeout):
190
 
        "Setter function for 'timeout' attribute"
191
 
        self._timeout = timeout
192
 
        self._timeout_milliseconds = ((self.timeout.days
193
 
                                       * 24 * 60 * 60 * 1000)
194
 
                                      + (self.timeout.seconds * 1000)
195
 
                                      + (self.timeout.microseconds
196
 
                                         // 1000))
197
 
    timeout = property(lambda self: self._timeout,
198
 
                       _set_timeout)
199
 
    del _set_timeout
200
 
    def _set_interval(self, interval):
201
 
        "Setter function for 'interval' attribute"
202
 
        self._interval = interval
203
 
        self._interval_milliseconds = ((self.interval.days
204
 
                                        * 24 * 60 * 60 * 1000)
205
 
                                       + (self.interval.seconds
206
 
                                          * 1000)
207
 
                                       + (self.interval.microseconds
208
 
                                          // 1000))
209
 
    interval = property(lambda self: self._interval,
210
 
                        _set_interval)
211
 
    del _set_interval
212
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
207
    def timeout_milliseconds(self):
 
208
        "Return the 'timeout' attribute in milliseconds"
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
 
212
    
 
213
    def interval_milliseconds(self):
 
214
        "Return the 'interval' attribute in milliseconds"
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
 
218
    
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
213
221
        """Note: the 'checker' key in 'config' sets the
214
222
        'checker_command' attribute and *not* the 'checker'
215
223
        attribute."""
216
224
        self.name = name
 
225
        if config is None:
 
226
            config = {}
217
227
        logger.debug(u"Creating client %r", self.name)
 
228
        self.use_dbus = use_dbus
 
229
        if self.use_dbus:
 
230
            self.dbus_object_path = (dbus.ObjectPath
 
231
                                     ("/Mandos/clients/"
 
232
                                      + self.name.replace(".", "_")))
 
233
            dbus.service.Object.__init__(self, bus,
 
234
                                         self.dbus_object_path)
218
235
        # Uppercase and remove spaces from fingerprint for later
219
236
        # comparison purposes with return value from the fingerprint()
220
237
        # function
221
 
        self.fingerprint = config["fingerprint"].upper()\
222
 
                           .replace(u" ", u"")
 
238
        self.fingerprint = (config["fingerprint"].upper()
 
239
                            .replace(u" ", u""))
223
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
224
241
        if "secret" in config:
225
242
            self.secret = config["secret"].decode(u"base64")
226
243
        elif "secfile" in config:
227
 
            sf = open(config["secfile"])
228
 
            self.secret = sf.read()
229
 
            sf.close()
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
 
247
                self.secret = secfile.read()
230
248
        else:
231
249
            raise TypeError(u"No secret or secfile for client %s"
232
250
                            % self.name)
233
 
        self.fqdn = config.get("fqdn", "")
234
 
        self.created = datetime.datetime.now()
 
251
        self.host = config.get("host", "")
 
252
        self.created = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
235
255
        self.last_checked_ok = None
236
256
        self.timeout = string_to_delta(config["timeout"])
237
257
        self.interval = string_to_delta(config["interval"])
238
 
        self.stop_hook = stop_hook
 
258
        self.disable_hook = disable_hook
239
259
        self.checker = None
240
260
        self.checker_initiator_tag = None
241
 
        self.stop_initiator_tag = None
 
261
        self.disable_initiator_tag = None
242
262
        self.checker_callback_tag = None
243
 
        self.check_command = config["checker"]
244
 
    def start(self):
 
263
        self.checker_command = config["checker"]
 
264
    
 
265
    def enable(self):
245
266
        """Start this client's checker and timeout hooks"""
 
267
        self.last_enabled = datetime.datetime.utcnow()
246
268
        # Schedule a new checker to be started an 'interval' from now,
247
269
        # and every interval from then on.
248
 
        self.checker_initiator_tag = gobject.timeout_add\
249
 
                                     (self._interval_milliseconds,
250
 
                                      self.start_checker)
 
270
        self.checker_initiator_tag = (gobject.timeout_add
 
271
                                      (self.interval_milliseconds(),
 
272
                                       self.start_checker))
251
273
        # Also start a new checker *right now*.
252
274
        self.start_checker()
253
 
        # Schedule a stop() when 'timeout' has passed
254
 
        self.stop_initiator_tag = gobject.timeout_add\
255
 
                                  (self._timeout_milliseconds,
256
 
                                   self.stop)
257
 
    def stop(self):
258
 
        """Stop this client.
259
 
        The possibility that a client might be restarted is left open,
260
 
        but not currently used."""
261
 
        # If this client doesn't have a secret, it is already stopped.
262
 
        if self.secret:
263
 
            logger.info(u"Stopping client %s", self.name)
264
 
            self.secret = None
265
 
        else:
 
275
        # Schedule a disable() when 'timeout' has passed
 
276
        self.disable_initiator_tag = (gobject.timeout_add
 
277
                                   (self.timeout_milliseconds(),
 
278
                                    self.disable))
 
279
        self.enabled = True
 
280
        if self.use_dbus:
 
281
            # Emit D-Bus signals
 
282
            self.PropertyChanged(dbus.String(u"enabled"),
 
283
                                 dbus.Boolean(True, variant_level=1))
 
284
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
285
                                 (_datetime_to_dbus(self.last_enabled,
 
286
                                                    variant_level=1)))
 
287
    
 
288
    def disable(self):
 
289
        """Disable this client."""
 
290
        if not getattr(self, "enabled", False):
266
291
            return False
267
 
        if getattr(self, "stop_initiator_tag", False):
268
 
            gobject.source_remove(self.stop_initiator_tag)
269
 
            self.stop_initiator_tag = None
 
292
        logger.info(u"Disabling client %s", self.name)
 
293
        if getattr(self, "disable_initiator_tag", False):
 
294
            gobject.source_remove(self.disable_initiator_tag)
 
295
            self.disable_initiator_tag = None
270
296
        if getattr(self, "checker_initiator_tag", False):
271
297
            gobject.source_remove(self.checker_initiator_tag)
272
298
            self.checker_initiator_tag = None
273
299
        self.stop_checker()
274
 
        if self.stop_hook:
275
 
            self.stop_hook(self)
 
300
        if self.disable_hook:
 
301
            self.disable_hook(self)
 
302
        self.enabled = False
 
303
        if self.use_dbus:
 
304
            # Emit D-Bus signal
 
305
            self.PropertyChanged(dbus.String(u"enabled"),
 
306
                                 dbus.Boolean(False, variant_level=1))
276
307
        # Do not run this again if called by a gobject.timeout_add
277
308
        return False
 
309
    
278
310
    def __del__(self):
279
 
        self.stop_hook = None
280
 
        self.stop()
281
 
    def checker_callback(self, pid, condition):
 
311
        self.disable_hook = None
 
312
        self.disable()
 
313
    
 
314
    def checker_callback(self, pid, condition, command):
282
315
        """The checker has completed, so take appropriate actions."""
283
 
        now = datetime.datetime.now()
284
316
        self.checker_callback_tag = None
285
317
        self.checker = None
286
 
        if os.WIFEXITED(condition) \
287
 
               and (os.WEXITSTATUS(condition) == 0):
 
318
        if self.use_dbus:
 
319
            # Emit D-Bus signal
 
320
            self.PropertyChanged(dbus.String(u"checker_running"),
 
321
                                 dbus.Boolean(False, variant_level=1))
 
322
        if (os.WIFEXITED(condition)
 
323
            and (os.WEXITSTATUS(condition) == 0)):
288
324
            logger.info(u"Checker for %(name)s succeeded",
289
325
                        vars(self))
290
 
            self.last_checked_ok = now
291
 
            gobject.source_remove(self.stop_initiator_tag)
292
 
            self.stop_initiator_tag = gobject.timeout_add\
293
 
                                      (self._timeout_milliseconds,
294
 
                                       self.stop)
 
326
            if self.use_dbus:
 
327
                # Emit D-Bus signal
 
328
                self.CheckerCompleted(dbus.Boolean(True),
 
329
                                      dbus.UInt16(condition),
 
330
                                      dbus.String(command))
 
331
            self.bump_timeout()
295
332
        elif not os.WIFEXITED(condition):
296
333
            logger.warning(u"Checker for %(name)s crashed?",
297
334
                           vars(self))
 
335
            if self.use_dbus:
 
336
                # Emit D-Bus signal
 
337
                self.CheckerCompleted(dbus.Boolean(False),
 
338
                                      dbus.UInt16(condition),
 
339
                                      dbus.String(command))
298
340
        else:
299
341
            logger.info(u"Checker for %(name)s failed",
300
342
                        vars(self))
 
343
            if self.use_dbus:
 
344
                # Emit D-Bus signal
 
345
                self.CheckerCompleted(dbus.Boolean(False),
 
346
                                      dbus.UInt16(condition),
 
347
                                      dbus.String(command))
 
348
    
 
349
    def bump_timeout(self):
 
350
        """Bump up the timeout for this client.
 
351
        This should only be called when the client has been seen,
 
352
        alive and well.
 
353
        """
 
354
        self.last_checked_ok = datetime.datetime.utcnow()
 
355
        gobject.source_remove(self.disable_initiator_tag)
 
356
        self.disable_initiator_tag = (gobject.timeout_add
 
357
                                      (self.timeout_milliseconds(),
 
358
                                       self.disable))
 
359
        if self.use_dbus:
 
360
            # Emit D-Bus signal
 
361
            self.PropertyChanged(
 
362
                dbus.String(u"last_checked_ok"),
 
363
                (_datetime_to_dbus(self.last_checked_ok,
 
364
                                   variant_level=1)))
 
365
    
301
366
    def start_checker(self):
302
367
        """Start a new checker subprocess if one is not running.
303
368
        If a checker already exists, leave it running and do
312
377
        # is as it should be.
313
378
        if self.checker is None:
314
379
            try:
315
 
                # In case check_command has exactly one % operator
316
 
                command = self.check_command % self.fqdn
 
380
                # In case checker_command has exactly one % operator
 
381
                command = self.checker_command % self.host
317
382
            except TypeError:
318
383
                # Escape attributes for the shell
319
384
                escaped_attrs = dict((key, re.escape(str(val)))
320
385
                                     for key, val in
321
386
                                     vars(self).iteritems())
322
387
                try:
323
 
                    command = self.check_command % escaped_attrs
 
388
                    command = self.checker_command % escaped_attrs
324
389
                except TypeError, error:
325
390
                    logger.error(u'Could not format string "%s":'
326
 
                                 u' %s', self.check_command, error)
 
391
                                 u' %s', self.checker_command, error)
327
392
                    return True # Try again later
328
393
            try:
329
394
                logger.info(u"Starting checker %r for %s",
330
395
                            command, self.name)
 
396
                # We don't need to redirect stdout and stderr, since
 
397
                # in normal mode, that is already done by daemon(),
 
398
                # and in debug mode we don't want to.  (Stdin is
 
399
                # always replaced by /dev/null.)
331
400
                self.checker = subprocess.Popen(command,
332
401
                                                close_fds=True,
333
402
                                                shell=True, cwd="/")
334
 
                self.checker_callback_tag = gobject.child_watch_add\
335
 
                                            (self.checker.pid,
336
 
                                             self.checker_callback)
337
 
            except subprocess.OSError, error:
 
403
                if self.use_dbus:
 
404
                    # Emit D-Bus signal
 
405
                    self.CheckerStarted(command)
 
406
                    self.PropertyChanged(
 
407
                        dbus.String("checker_running"),
 
408
                        dbus.Boolean(True, variant_level=1))
 
409
                self.checker_callback_tag = (gobject.child_watch_add
 
410
                                             (self.checker.pid,
 
411
                                              self.checker_callback,
 
412
                                              data=command))
 
413
            except OSError, error:
338
414
                logger.error(u"Failed to start subprocess: %s",
339
415
                             error)
340
416
        # Re-run this periodically if run by gobject.timeout_add
341
417
        return True
 
418
    
342
419
    def stop_checker(self):
343
420
        """Force the checker process, if any, to stop."""
344
421
        if self.checker_callback_tag:
346
423
            self.checker_callback_tag = None
347
424
        if getattr(self, "checker", None) is None:
348
425
            return
349
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
350
427
        try:
351
428
            os.kill(self.checker.pid, signal.SIGTERM)
352
429
            #os.sleep(0.5)
356
433
            if error.errno != errno.ESRCH: # No such process
357
434
                raise
358
435
        self.checker = None
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
 
439
    
359
440
    def still_valid(self):
360
441
        """Has the timeout not yet passed for this client?"""
361
 
        now = datetime.datetime.now()
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
362
445
        if self.last_checked_ok is None:
363
446
            return now < (self.created + self.timeout)
364
447
        else:
365
448
            return now < (self.last_checked_ok + self.timeout)
 
449
    
 
450
    ## D-Bus methods & signals
 
451
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
 
456
    
 
457
    # CheckerCompleted - signal
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
 
460
        "D-Bus signal"
 
461
        pass
 
462
    
 
463
    # CheckerStarted - signal
 
464
    @dbus.service.signal(_interface, signature="s")
 
465
    def CheckerStarted(self, command):
 
466
        "D-Bus signal"
 
467
        pass
 
468
    
 
469
    # GetAllProperties - method
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
 
471
    def GetAllProperties(self):
 
472
        "D-Bus method"
 
473
        return dbus.Dictionary({
 
474
                dbus.String("name"):
 
475
                    dbus.String(self.name, variant_level=1),
 
476
                dbus.String("fingerprint"):
 
477
                    dbus.String(self.fingerprint, variant_level=1),
 
478
                dbus.String("host"):
 
479
                    dbus.String(self.host, variant_level=1),
 
480
                dbus.String("created"):
 
481
                    _datetime_to_dbus(self.created, variant_level=1),
 
482
                dbus.String("last_enabled"):
 
483
                    (_datetime_to_dbus(self.last_enabled,
 
484
                                       variant_level=1)
 
485
                     if self.last_enabled is not None
 
486
                     else dbus.Boolean(False, variant_level=1)),
 
487
                dbus.String("enabled"):
 
488
                    dbus.Boolean(self.enabled, variant_level=1),
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
 
492
                     if self.last_checked_ok is not None
 
493
                     else dbus.Boolean (False, variant_level=1)),
 
494
                dbus.String("timeout"):
 
495
                    dbus.UInt64(self.timeout_milliseconds(),
 
496
                                variant_level=1),
 
497
                dbus.String("interval"):
 
498
                    dbus.UInt64(self.interval_milliseconds(),
 
499
                                variant_level=1),
 
500
                dbus.String("checker"):
 
501
                    dbus.String(self.checker_command,
 
502
                                variant_level=1),
 
503
                dbus.String("checker_running"):
 
504
                    dbus.Boolean(self.checker is not None,
 
505
                                 variant_level=1),
 
506
                }, signature="sv")
 
507
    
 
508
    # IsStillValid - method
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
 
512
    
 
513
    # PropertyChanged - signal
 
514
    @dbus.service.signal(_interface, signature="sv")
 
515
    def PropertyChanged(self, property, value):
 
516
        "D-Bus signal"
 
517
        pass
 
518
    
 
519
    # SetChecker - method
 
520
    @dbus.service.method(_interface, in_signature="s")
 
521
    def SetChecker(self, checker):
 
522
        "D-Bus setter method"
 
523
        self.checker_command = checker
 
524
        # Emit D-Bus signal
 
525
        self.PropertyChanged(dbus.String(u"checker"),
 
526
                             dbus.String(self.checker_command,
 
527
                                         variant_level=1))
 
528
    
 
529
    # SetHost - method
 
530
    @dbus.service.method(_interface, in_signature="s")
 
531
    def SetHost(self, host):
 
532
        "D-Bus setter method"
 
533
        self.host = host
 
534
        # Emit D-Bus signal
 
535
        self.PropertyChanged(dbus.String(u"host"),
 
536
                             dbus.String(self.host, variant_level=1))
 
537
    
 
538
    # SetInterval - method
 
539
    @dbus.service.method(_interface, in_signature="t")
 
540
    def SetInterval(self, milliseconds):
 
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
542
        # Emit D-Bus signal
 
543
        self.PropertyChanged(dbus.String(u"interval"),
 
544
                             (dbus.UInt64(self.interval_milliseconds(),
 
545
                                          variant_level=1)))
 
546
    
 
547
    # SetSecret - method
 
548
    @dbus.service.method(_interface, in_signature="ay",
 
549
                         byte_arrays=True)
 
550
    def SetSecret(self, secret):
 
551
        "D-Bus setter method"
 
552
        self.secret = str(secret)
 
553
    
 
554
    # SetTimeout - method
 
555
    @dbus.service.method(_interface, in_signature="t")
 
556
    def SetTimeout(self, milliseconds):
 
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
558
        # Emit D-Bus signal
 
559
        self.PropertyChanged(dbus.String(u"timeout"),
 
560
                             (dbus.UInt64(self.timeout_milliseconds(),
 
561
                                          variant_level=1)))
 
562
    
 
563
    # Enable - method
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
 
566
    
 
567
    # StartChecker - method
 
568
    @dbus.service.method(_interface)
 
569
    def StartChecker(self):
 
570
        "D-Bus method"
 
571
        self.start_checker()
 
572
    
 
573
    # Disable - method
 
574
    @dbus.service.method(_interface)
 
575
    def Disable(self):
 
576
        "D-Bus method"
 
577
        self.disable()
 
578
    
 
579
    # StopChecker - method
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
 
582
    
 
583
    del _interface
366
584
 
367
585
 
368
586
def peer_certificate(session):
369
587
    "Return the peer's OpenPGP certificate as a bytestring"
370
588
    # If not an OpenPGP certificate...
371
 
    if gnutls.library.functions.gnutls_certificate_type_get\
372
 
            (session._c_object) \
373
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
589
    if (gnutls.library.functions
 
590
        .gnutls_certificate_type_get(session._c_object)
 
591
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
374
592
        # ...do the normal thing
375
593
        return session.peer_certificate
376
594
    list_size = ctypes.c_uint()
377
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
 
        (session._c_object, ctypes.byref(list_size))
 
595
    cert_list = (gnutls.library.functions
 
596
                 .gnutls_certificate_get_peers
 
597
                 (session._c_object, ctypes.byref(list_size)))
379
598
    if list_size.value == 0:
380
599
        return None
381
600
    cert = cert_list[0]
385
604
def fingerprint(openpgp):
386
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
606
    # New GnuTLS "datum" with the OpenPGP public key
388
 
    datum = gnutls.library.types.gnutls_datum_t\
389
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
390
 
                     ctypes.POINTER(ctypes.c_ubyte)),
391
 
         ctypes.c_uint(len(openpgp)))
 
607
    datum = (gnutls.library.types
 
608
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
609
                                         ctypes.POINTER
 
610
                                         (ctypes.c_ubyte)),
 
611
                             ctypes.c_uint(len(openpgp))))
392
612
    # New empty GnuTLS certificate
393
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
395
 
        (ctypes.byref(crt))
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
396
616
    # Import the OpenPGP public key into the certificate
397
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
398
 
                    (crt, ctypes.byref(datum),
399
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
617
    (gnutls.library.functions
 
618
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
619
                                gnutls.library.constants
 
620
                                .GNUTLS_OPENPGP_FMT_RAW))
 
621
    # Verify the self signature in the key
 
622
    crtverify = ctypes.c_uint()
 
623
    (gnutls.library.functions
 
624
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
625
    if crtverify.value != 0:
 
626
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
627
        raise gnutls.errors.CertificateSecurityError("Verify failed")
400
628
    # New buffer for the fingerprint
401
 
    buffer = ctypes.create_string_buffer(20)
402
 
    buffer_length = ctypes.c_size_t()
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
403
631
    # Get the fingerprint from the certificate into the buffer
404
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
632
    (gnutls.library.functions
 
633
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
634
                                         ctypes.byref(buf_len)))
406
635
    # Deinit the certificate
407
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
637
    # Convert the buffer to a Python bytestring
409
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
410
639
    # Convert the bytestring to hexadecimal notation
411
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
641
    return hex_fpr
413
642
 
414
643
 
415
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
416
645
    """A TCP request handler class.
417
646
    Instantiated by IPv6_TCPServer for each request to handle it.
418
647
    Note: This will run in its own forked process."""
419
648
    
420
649
    def handle(self):
421
650
        logger.info(u"TCP connection from: %s",
422
 
                     unicode(self.client_address))
423
 
        session = gnutls.connection.ClientSession\
424
 
                  (self.request, gnutls.connection.X509Credentials())
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
425
656
        
426
657
        line = self.request.makefile().readline()
427
658
        logger.debug(u"Protocol version: %r", line)
440
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
673
        #                "+DHE-DSS"))
443
 
        priority = "NORMAL"             # Fallback default, since this
444
 
                                        # MUST be set.
445
 
        if self.server.settings["priority"]:
446
 
            priority = self.server.settings["priority"]
447
 
        gnutls.library.functions.gnutls_priority_set_direct\
448
 
            (session._c_object, priority, None);
 
674
        # Use a fallback default, since this MUST be set.
 
675
        priority = self.server.settings.get("priority", "NORMAL")
 
676
        (gnutls.library.functions
 
677
         .gnutls_priority_set_direct(session._c_object,
 
678
                                     priority, None))
449
679
        
450
680
        try:
451
681
            session.handshake()
461
691
            session.bye()
462
692
            return
463
693
        logger.debug(u"Fingerprint: %s", fpr)
464
 
        client = None
465
694
        for c in self.server.clients:
466
695
            if c.fingerprint == fpr:
467
696
                client = c
468
697
                break
469
 
        if not client:
 
698
        else:
470
699
            logger.warning(u"Client not found for fingerprint: %s",
471
700
                           fpr)
472
701
            session.bye()
479
708
                           vars(client))
480
709
            session.bye()
481
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
482
713
        sent_size = 0
483
714
        while sent_size < len(client.secret):
484
715
            sent = session.send(client.secret[sent_size:])
489
720
        session.bye()
490
721
 
491
722
 
492
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
493
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
494
726
    Attributes:
495
727
        settings:       Server settings
496
728
        clients:        Set() of Client objects
 
729
        enabled:        Boolean; whether this server is activated yet
497
730
    """
498
731
    address_family = socket.AF_INET6
499
732
    def __init__(self, *args, **kwargs):
503
736
        if "clients" in kwargs:
504
737
            self.clients = kwargs["clients"]
505
738
            del kwargs["clients"]
506
 
        return super(type(self), self).__init__(*args, **kwargs)
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
507
741
    def server_bind(self):
508
742
        """This overrides the normal server_bind() function
509
743
        to bind to an interface if one was specified, and also NOT to
528
762
                in6addr_any = "::"
529
763
                self.server_address = (in6addr_any,
530
764
                                       self.server_address[1])
531
 
            elif self.server_address[1] is None:
 
765
            elif not self.server_address[1]:
532
766
                self.server_address = (self.server_address[0],
533
767
                                       0)
534
 
            return super(type(self), self).server_bind()
 
768
#                 if self.settings["interface"]:
 
769
#                     self.server_address = (self.server_address[0],
 
770
#                                            0, # port
 
771
#                                            0, # flowinfo
 
772
#                                            if_nametoindex
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
 
776
    def server_activate(self):
 
777
        if self.enabled:
 
778
            return super(IPv6_TCPServer, self).server_activate()
 
779
    def enable(self):
 
780
        self.enabled = True
535
781
 
536
782
 
537
783
def string_to_delta(interval):
547
793
    datetime.timedelta(1)
548
794
    >>> string_to_delta(u'1w')
549
795
    datetime.timedelta(7)
 
796
    >>> string_to_delta('5m 30s')
 
797
    datetime.timedelta(0, 330)
550
798
    """
551
 
    try:
552
 
        suffix=unicode(interval[-1])
553
 
        value=int(interval[:-1])
554
 
        if suffix == u"d":
555
 
            delta = datetime.timedelta(value)
556
 
        elif suffix == u"s":
557
 
            delta = datetime.timedelta(0, value)
558
 
        elif suffix == u"m":
559
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
560
 
        elif suffix == u"h":
561
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
 
        elif suffix == u"w":
563
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
 
        else:
 
799
    timevalue = datetime.timedelta(0)
 
800
    for s in interval.split():
 
801
        try:
 
802
            suffix = unicode(s[-1])
 
803
            value = int(s[:-1])
 
804
            if suffix == u"d":
 
805
                delta = datetime.timedelta(value)
 
806
            elif suffix == u"s":
 
807
                delta = datetime.timedelta(0, value)
 
808
            elif suffix == u"m":
 
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
810
            elif suffix == u"h":
 
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
812
            elif suffix == u"w":
 
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
814
            else:
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
565
817
            raise ValueError
566
 
    except (ValueError, IndexError):
567
 
        raise ValueError
568
 
    return delta
 
818
        timevalue += delta
 
819
    return timevalue
569
820
 
570
821
 
571
822
def server_state_changed(state):
572
823
    """Derived from the Avahi example code"""
573
824
    if state == avahi.SERVER_COLLISION:
574
 
        logger.error(u"Server name collision")
 
825
        logger.error(u"Zeroconf server name collision")
575
826
        service.remove()
576
827
    elif state == avahi.SERVER_RUNNING:
577
828
        service.add()
579
830
 
580
831
def entry_group_state_changed(state, error):
581
832
    """Derived from the Avahi example code"""
582
 
    logger.debug(u"state change: %i", state)
 
833
    logger.debug(u"Avahi state change: %i", state)
583
834
    
584
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
 
        logger.debug(u"Service established.")
 
836
        logger.debug(u"Zeroconf service established.")
586
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
587
 
        logger.warning(u"Service name collision.")
 
838
        logger.warning(u"Zeroconf service name collision.")
588
839
        service.rename()
589
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
590
 
        logger.critical(u"Error in group state changed %s",
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
591
842
                        unicode(error))
592
 
        raise AvahiGroupError("State changed: %s", str(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
593
844
 
594
845
def if_nametoindex(interface):
595
846
    """Call the C function if_nametoindex(), or equivalent"""
596
847
    global if_nametoindex
597
848
    try:
598
 
        if "ctypes.util" not in sys.modules:
599
 
            import ctypes.util
600
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
601
 
            (ctypes.util.find_library("c")).if_nametoindex
 
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
850
                          (ctypes.util.find_library("c"))
 
851
                          .if_nametoindex)
602
852
    except (OSError, AttributeError):
603
853
        if "struct" not in sys.modules:
604
854
            import struct
607
857
        def if_nametoindex(interface):
608
858
            "Get an interface index the hard way, i.e. using fcntl()"
609
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
610
 
            s = socket.socket()
611
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
 
                                struct.pack("16s16x", interface))
613
 
            s.close()
 
860
            with closing(socket.socket()) as s:
 
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
862
                                    struct.pack("16s16x", interface))
614
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
615
864
            return interface_index
616
865
    return if_nametoindex(interface)
640
889
 
641
890
 
642
891
def main():
643
 
    global main_loop_started
644
 
    main_loop_started = False
645
 
    
646
 
    parser = OptionParser()
 
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
647
893
    parser.add_option("-i", "--interface", type="string",
648
894
                      metavar="IF", help="Bind to interface IF")
649
895
    parser.add_option("-a", "--address", type="string",
650
896
                      help="Address to listen for requests on")
651
897
    parser.add_option("-p", "--port", type="int",
652
898
                      help="Port number to receive requests on")
653
 
    parser.add_option("--check", action="store_true", default=False,
 
899
    parser.add_option("--check", action="store_true",
654
900
                      help="Run self-test")
655
 
    parser.add_option("--debug", action="store_true", default=False,
 
901
    parser.add_option("--debug", action="store_true",
656
902
                      help="Debug mode; run in foreground and log to"
657
903
                      " terminal")
658
904
    parser.add_option("--priority", type="string", help="GnuTLS"
663
909
                      default="/etc/mandos", metavar="DIR",
664
910
                      help="Directory to search for configuration"
665
911
                      " files")
666
 
    (options, args) = parser.parse_args()
 
912
    parser.add_option("--no-dbus", action="store_false",
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
 
916
    options = parser.parse_args()[0]
667
917
    
668
918
    if options.check:
669
919
        import doctest
678
928
                        "priority":
679
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
680
930
                        "servicename": "Mandos",
 
931
                        "use_dbus": "True",
681
932
                        }
682
933
    
683
934
    # Parse config file for server-global settings
684
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
685
936
    del server_defaults
686
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
 
    server_section = "server"
688
938
    # Convert the SafeConfigParser object to a dict
689
 
    server_settings = dict(server_config.items(server_section))
690
 
    # Use getboolean on the boolean config option
691
 
    server_settings["debug"] = server_config.getboolean\
692
 
                               (server_section, "debug")
 
939
    server_settings = server_config.defaults()
 
940
    # Use getboolean on the boolean config options
 
941
    server_settings["debug"] = (server_config.getboolean
 
942
                                ("DEFAULT", "debug"))
 
943
    server_settings["use_dbus"] = (server_config.getboolean
 
944
                                   ("DEFAULT", "use_dbus"))
693
945
    del server_config
694
946
    
695
947
    # Override the settings from the config file with command line
696
948
    # options, if set.
697
949
    for option in ("interface", "address", "port", "debug",
698
 
                   "priority", "servicename", "configdir"):
 
950
                   "priority", "servicename", "configdir",
 
951
                   "use_dbus"):
699
952
        value = getattr(options, option)
700
953
        if value is not None:
701
954
            server_settings[option] = value
702
955
    del options
703
956
    # Now we have our good server settings in "server_settings"
704
957
    
 
958
    # For convenience
 
959
    debug = server_settings["debug"]
 
960
    use_dbus = server_settings["use_dbus"]
 
961
    
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
 
965
    
 
966
    if server_settings["servicename"] != "Mandos":
 
967
        syslogger.setFormatter(logging.Formatter
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
 
970
                                % server_settings["servicename"]))
 
971
    
705
972
    # Parse config file with clients
706
973
    client_defaults = { "timeout": "1h",
707
974
                        "interval": "5m",
708
 
                        "checker": "fping -q -- %%(fqdn)s",
 
975
                        "checker": "fping -q -- %%(host)s",
 
976
                        "host": "",
709
977
                        }
710
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
711
979
    client_config.read(os.path.join(server_settings["configdir"],
712
980
                                    "clients.conf"))
713
981
    
 
982
    clients = Set()
 
983
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
984
                                 server_settings["port"]),
 
985
                                TCP_handler,
 
986
                                settings=server_settings,
 
987
                                clients=clients)
 
988
    pidfilename = "/var/run/mandos.pid"
 
989
    try:
 
990
        pidfile = open(pidfilename, "w")
 
991
    except IOError, error:
 
992
        logger.error("Could not open file %r", pidfilename)
 
993
    
 
994
    try:
 
995
        uid = pwd.getpwnam("_mandos").pw_uid
 
996
        gid = pwd.getpwnam("_mandos").pw_gid
 
997
    except KeyError:
 
998
        try:
 
999
            uid = pwd.getpwnam("mandos").pw_uid
 
1000
            gid = pwd.getpwnam("mandos").pw_gid
 
1001
        except KeyError:
 
1002
            try:
 
1003
                uid = pwd.getpwnam("nobody").pw_uid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
 
1005
            except KeyError:
 
1006
                uid = 65534
 
1007
                gid = 65534
 
1008
    try:
 
1009
        os.setuid(uid)
 
1010
        os.setgid(gid)
 
1011
    except OSError, error:
 
1012
        if error[0] != errno.EPERM:
 
1013
            raise error
 
1014
    
714
1015
    global service
715
1016
    service = AvahiService(name = server_settings["servicename"],
716
 
                           type = "_mandos._tcp", );
 
1017
                           servicetype = "_mandos._tcp", )
717
1018
    if server_settings["interface"]:
718
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
719
1021
    
720
1022
    global main_loop
721
1023
    global bus
724
1026
    DBusGMainLoop(set_as_default=True )
725
1027
    main_loop = gobject.MainLoop()
726
1028
    bus = dbus.SystemBus()
727
 
    server = dbus.Interface(
728
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
 
            avahi.DBUS_INTERFACE_SERVER )
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
730
1032
    # End of Avahi example code
731
 
    
732
 
    debug = server_settings["debug"]
733
 
    
734
 
    if debug:
735
 
        console = logging.StreamHandler()
736
 
        # console.setLevel(logging.DEBUG)
737
 
        console.setFormatter(logging.Formatter\
738
 
                             ('%(levelname)s: %(message)s'))
739
 
        logger.addHandler(console)
740
 
        del console
741
 
    
742
 
    clients = Set()
743
 
    def remove_from_clients(client):
744
 
        clients.remove(client)
745
 
        if not clients:
746
 
            logger.critical(u"No clients left, exiting")
747
 
            sys.exit()
 
1033
    if use_dbus:
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
748
1036
    
749
1037
    clients.update(Set(Client(name = section,
750
 
                              stop_hook = remove_from_clients,
751
1038
                              config
752
 
                              = dict(client_config.items(section)))
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
753
1041
                       for section in client_config.sections()))
 
1042
    if not clients:
 
1043
        logger.warning(u"No clients defined")
754
1044
    
755
 
    if not debug:
 
1045
    if debug:
 
1046
        # Redirect stdin so all checkers get /dev/null
 
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1048
        os.dup2(null, sys.stdin.fileno())
 
1049
        if null > 2:
 
1050
            os.close(null)
 
1051
    else:
 
1052
        # No console logging
 
1053
        logger.removeHandler(console)
 
1054
        # Close all input and output, do double fork, etc.
756
1055
        daemon()
757
1056
    
 
1057
    try:
 
1058
        pid = os.getpid()
 
1059
        pidfile.write(str(pid) + "\n")
 
1060
        pidfile.close()
 
1061
        del pidfile
 
1062
    except IOError:
 
1063
        logger.error(u"Could not write to file %r with PID %d",
 
1064
                     pidfilename, pid)
 
1065
    except NameError:
 
1066
        # "pidfile" was never created
 
1067
        pass
 
1068
    del pidfilename
 
1069
    
758
1070
    def cleanup():
759
1071
        "Cleanup function; run on exit"
760
1072
        global group
766
1078
        
767
1079
        while clients:
768
1080
            client = clients.pop()
769
 
            client.stop_hook = None
770
 
            client.stop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
771
1083
    
772
1084
    atexit.register(cleanup)
773
1085
    
776
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
777
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
778
1090
    
 
1091
    if use_dbus:
 
1092
        class MandosServer(dbus.service.Object):
 
1093
            """A D-Bus proxy object"""
 
1094
            def __init__(self):
 
1095
                dbus.service.Object.__init__(self, bus,
 
1096
                                             "/Mandos")
 
1097
            _interface = u"org.mandos_system.Mandos"
 
1098
 
 
1099
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1100
            def ClientAdded(self, objpath, properties):
 
1101
                "D-Bus signal"
 
1102
                pass
 
1103
 
 
1104
            @dbus.service.signal(_interface, signature="o")
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
 
1109
            @dbus.service.method(_interface, out_signature="ao")
 
1110
            def GetAllClients(self):
 
1111
                return dbus.Array(c.dbus_object_path for c in clients)
 
1112
 
 
1113
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1114
            def GetAllClientsWithProperties(self):
 
1115
                return dbus.Dictionary(
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
 
1118
                    signature="oa{sv}")
 
1119
 
 
1120
            @dbus.service.method(_interface, in_signature="o")
 
1121
            def RemoveClient(self, object_path):
 
1122
                for c in clients:
 
1123
                    if c.dbus_object_path == object_path:
 
1124
                        clients.remove(c)
 
1125
                        # Don't signal anything except ClientRemoved
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
 
1128
                        # Emit D-Bus signal
 
1129
                        self.ClientRemoved(object_path)
 
1130
                        return
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
 
1136
            del _interface
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
779
1140
    for client in clients:
780
 
        client.start()
781
 
    
782
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
783
 
                                 server_settings["port"]),
784
 
                                tcp_handler,
785
 
                                settings=server_settings,
786
 
                                clients=clients)
 
1141
        if use_dbus:
 
1142
            # Emit D-Bus signal
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
 
1145
        client.enable()
 
1146
    
 
1147
    tcp_server.enable()
 
1148
    tcp_server.server_activate()
 
1149
    
787
1150
    # Find out what port we got
788
1151
    service.port = tcp_server.socket.getsockname()[1]
789
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
803
1166
        
804
1167
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
805
1168
                             lambda *args, **kwargs:
806
 
                             tcp_server.handle_request\
807
 
                             (*args[2:], **kwargs) or True)
 
1169
                             (tcp_server.handle_request
 
1170
                              (*args[2:], **kwargs) or True))
808
1171
        
809
 
        logger.debug("Starting main loop")
810
 
        main_loop_started = True
 
1172
        logger.debug(u"Starting main loop")
811
1173
        main_loop.run()
812
1174
    except AvahiError, error:
813
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1175
        logger.critical(u"AvahiError: %s", error)
814
1176
        sys.exit(1)
815
1177
    except KeyboardInterrupt:
816
1178
        if debug: