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  • Committer: Teddy Hogeborn
  • Date: 2008-08-22 00:16:20 UTC
  • mfrom: (24.1.57 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20080822001620-vxpn1evy0t0kyvj0
* clients.conf ([DEFAULT]/checker): Update to new default value.

* mandos (Client.start_checker): Bug fix: OSError, not
                                 subprocess.OSError.
  (main): Use "fping -q -- %(host)s" instead of "fping -q --
          %%(host)s" as default value for "checker".  Always redirect
          stdin to be from /dev/null, even if in debug mode.

* mandos-clients.conf.xml (DESCRIPTION): Improved wording and refer to
                                         the EXPANSION section.
  (OPTIONS): Added synopsis and improved wording for "checker",
             "fingerprint", and "secret".  Refer to the RUNTIME
             EXPANSION section for the "checker" option.
  (EXAMPLE): Update to new default value for "checker".

* mandos-keygen (trap): Split lines and add "set +e".

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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 © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
# 
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
# 
27
26
# 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/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
# 
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
# 
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
57
 
61
58
import dbus
62
 
import dbus.service
63
59
import gobject
64
60
import avahi
65
61
from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
 
import ctypes.util
68
63
 
69
 
version = "1.0.5"
 
64
version = "1.0"
70
65
 
71
66
logger = logging.Logger('mandos')
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'))
 
67
syslogger = logging.handlers.SysLogHandler\
 
68
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
69
             address = "/dev/log")
 
70
syslogger.setFormatter(logging.Formatter\
 
71
                        ('Mandos: %(levelname)s: %(message)s'))
77
72
logger.addHandler(syslogger)
78
73
 
79
74
console = logging.StreamHandler()
82
77
logger.addHandler(console)
83
78
 
84
79
class AvahiError(Exception):
85
 
    def __init__(self, value, *args, **kwargs):
 
80
    def __init__(self, value):
86
81
        self.value = value
87
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
88
 
    def __unicode__(self):
89
 
        return unicode(repr(self.value))
 
82
    def __str__(self):
 
83
        return repr(self.value)
90
84
 
91
85
class AvahiServiceError(AvahiError):
92
86
    pass
112
106
                  a sensible number of times
113
107
    """
114
108
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
 
                 servicetype = None, port = None, TXT = None,
116
 
                 domain = "", host = "", max_renames = 32768):
 
109
                 type = None, port = None, TXT = None, domain = "",
 
110
                 host = "", max_renames = 32768):
117
111
        self.interface = interface
118
112
        self.name = name
119
 
        self.type = servicetype
 
113
        self.type = type
120
114
        self.port = port
121
 
        self.TXT = TXT if TXT is not None else []
 
115
        if TXT is None:
 
116
            self.TXT = []
 
117
        else:
 
118
            self.TXT = TXT
122
119
        self.domain = domain
123
120
        self.host = host
124
121
        self.rename_count = 0
126
123
    def rename(self):
127
124
        """Derived from the Avahi example code"""
128
125
        if self.rename_count >= self.max_renames:
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")
 
126
            logger.critical(u"No suitable service name found after %i"
 
127
                            u" retries, exiting.", rename_count)
 
128
            raise AvahiServiceError("Too many renames")
133
129
        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
 
130
        logger.info(u"Changing name to %r ...", str(self.name))
 
131
        syslogger.setFormatter(logging.Formatter\
137
132
                               ('Mandos (%s): %%(levelname)s:'
138
 
                                ' %%(message)s' % self.name))
 
133
                               ' %%(message)s' % self.name))
139
134
        self.remove()
140
135
        self.add()
141
136
        self.rename_count += 1
147
142
        """Derived from the Avahi example code"""
148
143
        global group
149
144
        if group is None:
150
 
            group = dbus.Interface(bus.get_object
151
 
                                   (avahi.DBUS_NAME,
 
145
            group = dbus.Interface\
 
146
                    (bus.get_object(avahi.DBUS_NAME,
152
147
                                    server.EntryGroupNew()),
153
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
148
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
149
            group.connect_to_signal('StateChanged',
155
150
                                    entry_group_state_changed)
156
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
151
        logger.debug(u"Adding service '%s' of type '%s' ...",
157
152
                     service.name, service.type)
158
153
        group.AddService(
159
154
                self.interface,         # interface
170
165
# End of Avahi example code
171
166
 
172
167
 
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):
 
168
class Client(object):
179
169
    """A representation of a client host served by this server.
180
170
    Attributes:
181
 
    name:       string; from the config file, used in log messages and
182
 
                        D-Bus identifiers
 
171
    name:      string; from the config file, used in log messages
183
172
    fingerprint: string (40 or 32 hexadecimal digits); used to
184
173
                 uniquely identify the client
185
 
    secret:     bytestring; sent verbatim (over TLS) to client
186
 
    host:       string; available for use by the checker command
187
 
    created:    datetime.datetime(); (UTC) object creation
188
 
    last_enabled: datetime.datetime(); (UTC)
189
 
    enabled:    bool()
190
 
    last_checked_ok: datetime.datetime(); (UTC) or None
191
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
192
 
                                      until this client is invalid
193
 
    interval:   datetime.timedelta(); How often to start a new checker
194
 
    disable_hook:  If set, called by disable() as disable_hook(self)
195
 
    checker:    subprocess.Popen(); a running checker process used
196
 
                                    to see if the client lives.
197
 
                                    'None' if no process is running.
 
174
    secret:    bytestring; sent verbatim (over TLS) to client
 
175
    host:      string; available for use by the checker command
 
176
    created:   datetime.datetime(); object creation, not client host
 
177
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
178
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
179
                                     until this client is invalid
 
180
    interval:  datetime.timedelta(); How often to start a new checker
 
181
    stop_hook: If set, called by stop() as stop_hook(self)
 
182
    checker:   subprocess.Popen(); a running checker process used
 
183
                                   to see if the client lives.
 
184
                                   'None' if no process is running.
198
185
    checker_initiator_tag: a gobject event source tag, or None
199
 
    disable_initiator_tag:    - '' -
 
186
    stop_initiator_tag:    - '' -
200
187
    checker_callback_tag:  - '' -
201
188
    checker_command: string; External command which is run to check if
202
189
                     client lives.  %() expansions are done at
203
190
                     runtime with vars(self) as dict, so that for
204
191
                     instance %(name)s can be used in the command.
205
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
206
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
192
    Private attibutes:
 
193
    _timeout: Real variable for 'timeout'
 
194
    _interval: Real variable for 'interval'
 
195
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
196
    _interval_milliseconds: - '' -
207
197
    """
208
 
    def timeout_milliseconds(self):
209
 
        "Return the 'timeout' attribute in milliseconds"
210
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
 
                + (self.timeout.seconds * 1000)
212
 
                + (self.timeout.microseconds // 1000))
213
 
    
214
 
    def interval_milliseconds(self):
215
 
        "Return the 'interval' attribute in milliseconds"
216
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
217
 
                + (self.interval.seconds * 1000)
218
 
                + (self.interval.microseconds // 1000))
219
 
    
220
 
    def __init__(self, name = None, disable_hook=None, config=None,
221
 
                 use_dbus=True):
 
198
    def _set_timeout(self, timeout):
 
199
        "Setter function for 'timeout' attribute"
 
200
        self._timeout = timeout
 
201
        self._timeout_milliseconds = ((self.timeout.days
 
202
                                       * 24 * 60 * 60 * 1000)
 
203
                                      + (self.timeout.seconds * 1000)
 
204
                                      + (self.timeout.microseconds
 
205
                                         // 1000))
 
206
    timeout = property(lambda self: self._timeout,
 
207
                       _set_timeout)
 
208
    del _set_timeout
 
209
    def _set_interval(self, interval):
 
210
        "Setter function for 'interval' attribute"
 
211
        self._interval = interval
 
212
        self._interval_milliseconds = ((self.interval.days
 
213
                                        * 24 * 60 * 60 * 1000)
 
214
                                       + (self.interval.seconds
 
215
                                          * 1000)
 
216
                                       + (self.interval.microseconds
 
217
                                          // 1000))
 
218
    interval = property(lambda self: self._interval,
 
219
                        _set_interval)
 
220
    del _set_interval
 
221
    def __init__(self, name = None, stop_hook=None, config={}):
222
222
        """Note: the 'checker' key in 'config' sets the
223
223
        'checker_command' attribute and *not* the 'checker'
224
224
        attribute."""
225
225
        self.name = name
226
 
        if config is None:
227
 
            config = {}
228
226
        logger.debug(u"Creating client %r", self.name)
229
 
        self.use_dbus = False   # During __init__
230
227
        # Uppercase and remove spaces from fingerprint for later
231
228
        # comparison purposes with return value from the fingerprint()
232
229
        # function
233
 
        self.fingerprint = (config["fingerprint"].upper()
234
 
                            .replace(u" ", u""))
 
230
        self.fingerprint = config["fingerprint"].upper()\
 
231
                           .replace(u" ", u"")
235
232
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
236
233
        if "secret" in config:
237
234
            self.secret = config["secret"].decode(u"base64")
238
235
        elif "secfile" in config:
239
 
            with closing(open(os.path.expanduser
240
 
                              (os.path.expandvars
241
 
                               (config["secfile"])))) as secfile:
242
 
                self.secret = secfile.read()
 
236
            sf = open(config["secfile"])
 
237
            self.secret = sf.read()
 
238
            sf.close()
243
239
        else:
244
240
            raise TypeError(u"No secret or secfile for client %s"
245
241
                            % self.name)
246
242
        self.host = config.get("host", "")
247
 
        self.created = datetime.datetime.utcnow()
248
 
        self.enabled = False
249
 
        self.last_enabled = None
 
243
        self.created = datetime.datetime.now()
250
244
        self.last_checked_ok = None
251
245
        self.timeout = string_to_delta(config["timeout"])
252
246
        self.interval = string_to_delta(config["interval"])
253
 
        self.disable_hook = disable_hook
 
247
        self.stop_hook = stop_hook
254
248
        self.checker = None
255
249
        self.checker_initiator_tag = None
256
 
        self.disable_initiator_tag = None
 
250
        self.stop_initiator_tag = None
257
251
        self.checker_callback_tag = None
258
 
        self.checker_command = config["checker"]
259
 
        self.last_connect = None
260
 
        # Only now, when this client is initialized, can it show up on
261
 
        # the D-Bus
262
 
        self.use_dbus = use_dbus
263
 
        if self.use_dbus:
264
 
            self.dbus_object_path = (dbus.ObjectPath
265
 
                                     ("/clients/"
266
 
                                      + self.name.replace(".", "_")))
267
 
            dbus.service.Object.__init__(self, bus,
268
 
                                         self.dbus_object_path)
269
 
    
270
 
    def enable(self):
 
252
        self.check_command = config["checker"]
 
253
    def start(self):
271
254
        """Start this client's checker and timeout hooks"""
272
 
        self.last_enabled = datetime.datetime.utcnow()
273
255
        # Schedule a new checker to be started an 'interval' from now,
274
256
        # and every interval from then on.
275
 
        self.checker_initiator_tag = (gobject.timeout_add
276
 
                                      (self.interval_milliseconds(),
277
 
                                       self.start_checker))
 
257
        self.checker_initiator_tag = gobject.timeout_add\
 
258
                                     (self._interval_milliseconds,
 
259
                                      self.start_checker)
278
260
        # Also start a new checker *right now*.
279
261
        self.start_checker()
280
 
        # Schedule a disable() when 'timeout' has passed
281
 
        self.disable_initiator_tag = (gobject.timeout_add
282
 
                                   (self.timeout_milliseconds(),
283
 
                                    self.disable))
284
 
        self.enabled = True
285
 
        if self.use_dbus:
286
 
            # Emit D-Bus signals
287
 
            self.PropertyChanged(dbus.String(u"enabled"),
288
 
                                 dbus.Boolean(True, variant_level=1))
289
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
290
 
                                 (_datetime_to_dbus(self.last_enabled,
291
 
                                                    variant_level=1)))
292
 
    
293
 
    def disable(self):
294
 
        """Disable this client."""
295
 
        if not getattr(self, "enabled", False):
 
262
        # Schedule a stop() when 'timeout' has passed
 
263
        self.stop_initiator_tag = gobject.timeout_add\
 
264
                                  (self._timeout_milliseconds,
 
265
                                   self.stop)
 
266
    def stop(self):
 
267
        """Stop this client.
 
268
        The possibility that a client might be restarted is left open,
 
269
        but not currently used."""
 
270
        # If this client doesn't have a secret, it is already stopped.
 
271
        if hasattr(self, "secret") and self.secret:
 
272
            logger.info(u"Stopping client %s", self.name)
 
273
            self.secret = None
 
274
        else:
296
275
            return False
297
 
        logger.info(u"Disabling client %s", self.name)
298
 
        if getattr(self, "disable_initiator_tag", False):
299
 
            gobject.source_remove(self.disable_initiator_tag)
300
 
            self.disable_initiator_tag = None
 
276
        if getattr(self, "stop_initiator_tag", False):
 
277
            gobject.source_remove(self.stop_initiator_tag)
 
278
            self.stop_initiator_tag = None
301
279
        if getattr(self, "checker_initiator_tag", False):
302
280
            gobject.source_remove(self.checker_initiator_tag)
303
281
            self.checker_initiator_tag = None
304
282
        self.stop_checker()
305
 
        if self.disable_hook:
306
 
            self.disable_hook(self)
307
 
        self.enabled = False
308
 
        if self.use_dbus:
309
 
            # Emit D-Bus signal
310
 
            self.PropertyChanged(dbus.String(u"enabled"),
311
 
                                 dbus.Boolean(False, variant_level=1))
 
283
        if self.stop_hook:
 
284
            self.stop_hook(self)
312
285
        # Do not run this again if called by a gobject.timeout_add
313
286
        return False
314
 
    
315
287
    def __del__(self):
316
 
        self.disable_hook = None
317
 
        self.disable()
318
 
    
319
 
    def checker_callback(self, pid, condition, command):
 
288
        self.stop_hook = None
 
289
        self.stop()
 
290
    def checker_callback(self, pid, condition):
320
291
        """The checker has completed, so take appropriate actions."""
 
292
        now = datetime.datetime.now()
321
293
        self.checker_callback_tag = None
322
294
        self.checker = None
323
 
        if self.use_dbus:
324
 
            # Emit D-Bus signal
325
 
            self.PropertyChanged(dbus.String(u"checker_running"),
326
 
                                 dbus.Boolean(False, variant_level=1))
327
 
        if os.WIFEXITED(condition):
328
 
            exitstatus = os.WEXITSTATUS(condition)
329
 
            if exitstatus == 0:
330
 
                logger.info(u"Checker for %(name)s succeeded",
331
 
                            vars(self))
332
 
                self.checked_ok()
333
 
            else:
334
 
                logger.info(u"Checker for %(name)s failed",
335
 
                            vars(self))
336
 
            if self.use_dbus:
337
 
                # Emit D-Bus signal
338
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
339
 
                                      dbus.Int64(condition),
340
 
                                      dbus.String(command))
341
 
        else:
 
295
        if os.WIFEXITED(condition) \
 
296
               and (os.WEXITSTATUS(condition) == 0):
 
297
            logger.info(u"Checker for %(name)s succeeded",
 
298
                        vars(self))
 
299
            self.last_checked_ok = now
 
300
            gobject.source_remove(self.stop_initiator_tag)
 
301
            self.stop_initiator_tag = gobject.timeout_add\
 
302
                                      (self._timeout_milliseconds,
 
303
                                       self.stop)
 
304
        elif not os.WIFEXITED(condition):
342
305
            logger.warning(u"Checker for %(name)s crashed?",
343
306
                           vars(self))
344
 
            if self.use_dbus:
345
 
                # Emit D-Bus signal
346
 
                self.CheckerCompleted(dbus.Int16(-1),
347
 
                                      dbus.Int64(condition),
348
 
                                      dbus.String(command))
349
 
    
350
 
    def checked_ok(self):
351
 
        """Bump up the timeout for this client.
352
 
        This should only be called when the client has been seen,
353
 
        alive and well.
354
 
        """
355
 
        self.last_checked_ok = datetime.datetime.utcnow()
356
 
        gobject.source_remove(self.disable_initiator_tag)
357
 
        self.disable_initiator_tag = (gobject.timeout_add
358
 
                                      (self.timeout_milliseconds(),
359
 
                                       self.disable))
360
 
        if self.use_dbus:
361
 
            # Emit D-Bus signal
362
 
            self.PropertyChanged(
363
 
                dbus.String(u"last_checked_ok"),
364
 
                (_datetime_to_dbus(self.last_checked_ok,
365
 
                                   variant_level=1)))
366
 
    
 
307
        else:
 
308
            logger.info(u"Checker for %(name)s failed",
 
309
                        vars(self))
367
310
    def start_checker(self):
368
311
        """Start a new checker subprocess if one is not running.
369
312
        If a checker already exists, leave it running and do
378
321
        # is as it should be.
379
322
        if self.checker is None:
380
323
            try:
381
 
                # In case checker_command has exactly one % operator
382
 
                command = self.checker_command % self.host
 
324
                # In case check_command has exactly one % operator
 
325
                command = self.check_command % self.host
383
326
            except TypeError:
384
327
                # Escape attributes for the shell
385
328
                escaped_attrs = dict((key, re.escape(str(val)))
386
329
                                     for key, val in
387
330
                                     vars(self).iteritems())
388
331
                try:
389
 
                    command = self.checker_command % escaped_attrs
 
332
                    command = self.check_command % escaped_attrs
390
333
                except TypeError, error:
391
334
                    logger.error(u'Could not format string "%s":'
392
 
                                 u' %s', self.checker_command, error)
 
335
                                 u' %s', self.check_command, error)
393
336
                    return True # Try again later
394
337
            try:
395
338
                logger.info(u"Starting checker %r for %s",
401
344
                self.checker = subprocess.Popen(command,
402
345
                                                close_fds=True,
403
346
                                                shell=True, cwd="/")
404
 
                if self.use_dbus:
405
 
                    # Emit D-Bus signal
406
 
                    self.CheckerStarted(command)
407
 
                    self.PropertyChanged(
408
 
                        dbus.String("checker_running"),
409
 
                        dbus.Boolean(True, variant_level=1))
410
 
                self.checker_callback_tag = (gobject.child_watch_add
411
 
                                             (self.checker.pid,
412
 
                                              self.checker_callback,
413
 
                                              data=command))
 
347
                self.checker_callback_tag = gobject.child_watch_add\
 
348
                                            (self.checker.pid,
 
349
                                             self.checker_callback)
414
350
            except OSError, error:
415
351
                logger.error(u"Failed to start subprocess: %s",
416
352
                             error)
417
353
        # Re-run this periodically if run by gobject.timeout_add
418
354
        return True
419
 
    
420
355
    def stop_checker(self):
421
356
        """Force the checker process, if any, to stop."""
422
357
        if self.checker_callback_tag:
434
369
            if error.errno != errno.ESRCH: # No such process
435
370
                raise
436
371
        self.checker = None
437
 
        if self.use_dbus:
438
 
            self.PropertyChanged(dbus.String(u"checker_running"),
439
 
                                 dbus.Boolean(False, variant_level=1))
440
 
    
441
372
    def still_valid(self):
442
373
        """Has the timeout not yet passed for this client?"""
443
 
        if not getattr(self, "enabled", False):
444
 
            return False
445
 
        now = datetime.datetime.utcnow()
 
374
        now = datetime.datetime.now()
446
375
        if self.last_checked_ok is None:
447
376
            return now < (self.created + self.timeout)
448
377
        else:
449
378
            return now < (self.last_checked_ok + self.timeout)
450
 
    
451
 
    ## D-Bus methods & signals
452
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
453
 
    
454
 
    # CheckedOK - method
455
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
456
 
    CheckedOK.__name__ = "CheckedOK"
457
 
    
458
 
    # CheckerCompleted - signal
459
 
    @dbus.service.signal(_interface, signature="nxs")
460
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
461
 
        "D-Bus signal"
462
 
        pass
463
 
    
464
 
    # CheckerStarted - signal
465
 
    @dbus.service.signal(_interface, signature="s")
466
 
    def CheckerStarted(self, command):
467
 
        "D-Bus signal"
468
 
        pass
469
 
    
470
 
    # GetAllProperties - method
471
 
    @dbus.service.method(_interface, out_signature="a{sv}")
472
 
    def GetAllProperties(self):
473
 
        "D-Bus method"
474
 
        return dbus.Dictionary({
475
 
                dbus.String("name"):
476
 
                    dbus.String(self.name, variant_level=1),
477
 
                dbus.String("fingerprint"):
478
 
                    dbus.String(self.fingerprint, variant_level=1),
479
 
                dbus.String("host"):
480
 
                    dbus.String(self.host, variant_level=1),
481
 
                dbus.String("created"):
482
 
                    _datetime_to_dbus(self.created, variant_level=1),
483
 
                dbus.String("last_enabled"):
484
 
                    (_datetime_to_dbus(self.last_enabled,
485
 
                                       variant_level=1)
486
 
                     if self.last_enabled is not None
487
 
                     else dbus.Boolean(False, variant_level=1)),
488
 
                dbus.String("enabled"):
489
 
                    dbus.Boolean(self.enabled, variant_level=1),
490
 
                dbus.String("last_checked_ok"):
491
 
                    (_datetime_to_dbus(self.last_checked_ok,
492
 
                                       variant_level=1)
493
 
                     if self.last_checked_ok is not None
494
 
                     else dbus.Boolean (False, variant_level=1)),
495
 
                dbus.String("timeout"):
496
 
                    dbus.UInt64(self.timeout_milliseconds(),
497
 
                                variant_level=1),
498
 
                dbus.String("interval"):
499
 
                    dbus.UInt64(self.interval_milliseconds(),
500
 
                                variant_level=1),
501
 
                dbus.String("checker"):
502
 
                    dbus.String(self.checker_command,
503
 
                                variant_level=1),
504
 
                dbus.String("checker_running"):
505
 
                    dbus.Boolean(self.checker is not None,
506
 
                                 variant_level=1),
507
 
                dbus.String("object_path"):
508
 
                    dbus.ObjectPath(self.dbus_object_path,
509
 
                                    variant_level=1)
510
 
                }, signature="sv")
511
 
    
512
 
    # IsStillValid - method
513
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
 
                    (still_valid))
515
 
    IsStillValid.__name__ = "IsStillValid"
516
 
    
517
 
    # PropertyChanged - signal
518
 
    @dbus.service.signal(_interface, signature="sv")
519
 
    def PropertyChanged(self, property, value):
520
 
        "D-Bus signal"
521
 
        pass
522
 
    
523
 
    # SetChecker - method
524
 
    @dbus.service.method(_interface, in_signature="s")
525
 
    def SetChecker(self, checker):
526
 
        "D-Bus setter method"
527
 
        self.checker_command = checker
528
 
        # Emit D-Bus signal
529
 
        self.PropertyChanged(dbus.String(u"checker"),
530
 
                             dbus.String(self.checker_command,
531
 
                                         variant_level=1))
532
 
    
533
 
    # SetHost - method
534
 
    @dbus.service.method(_interface, in_signature="s")
535
 
    def SetHost(self, host):
536
 
        "D-Bus setter method"
537
 
        self.host = host
538
 
        # Emit D-Bus signal
539
 
        self.PropertyChanged(dbus.String(u"host"),
540
 
                             dbus.String(self.host, variant_level=1))
541
 
    
542
 
    # SetInterval - method
543
 
    @dbus.service.method(_interface, in_signature="t")
544
 
    def SetInterval(self, milliseconds):
545
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
 
        # Emit D-Bus signal
547
 
        self.PropertyChanged(dbus.String(u"interval"),
548
 
                             (dbus.UInt64(self.interval_milliseconds(),
549
 
                                          variant_level=1)))
550
 
    
551
 
    # SetSecret - method
552
 
    @dbus.service.method(_interface, in_signature="ay",
553
 
                         byte_arrays=True)
554
 
    def SetSecret(self, secret):
555
 
        "D-Bus setter method"
556
 
        self.secret = str(secret)
557
 
    
558
 
    # SetTimeout - method
559
 
    @dbus.service.method(_interface, in_signature="t")
560
 
    def SetTimeout(self, milliseconds):
561
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
 
        # Emit D-Bus signal
563
 
        self.PropertyChanged(dbus.String(u"timeout"),
564
 
                             (dbus.UInt64(self.timeout_milliseconds(),
565
 
                                          variant_level=1)))
566
 
    
567
 
    # Enable - method
568
 
    Enable = dbus.service.method(_interface)(enable)
569
 
    Enable.__name__ = "Enable"
570
 
    
571
 
    # StartChecker - method
572
 
    @dbus.service.method(_interface)
573
 
    def StartChecker(self):
574
 
        "D-Bus method"
575
 
        self.start_checker()
576
 
    
577
 
    # Disable - method
578
 
    @dbus.service.method(_interface)
579
 
    def Disable(self):
580
 
        "D-Bus method"
581
 
        self.disable()
582
 
    
583
 
    # StopChecker - method
584
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
585
 
    StopChecker.__name__ = "StopChecker"
586
 
    
587
 
    del _interface
588
379
 
589
380
 
590
381
def peer_certificate(session):
591
382
    "Return the peer's OpenPGP certificate as a bytestring"
592
383
    # If not an OpenPGP certificate...
593
 
    if (gnutls.library.functions
594
 
        .gnutls_certificate_type_get(session._c_object)
595
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
384
    if gnutls.library.functions.gnutls_certificate_type_get\
 
385
            (session._c_object) \
 
386
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
596
387
        # ...do the normal thing
597
388
        return session.peer_certificate
598
 
    list_size = ctypes.c_uint(1)
599
 
    cert_list = (gnutls.library.functions
600
 
                 .gnutls_certificate_get_peers
601
 
                 (session._c_object, ctypes.byref(list_size)))
602
 
    if not bool(cert_list) and list_size.value != 0:
603
 
        raise gnutls.errors.GNUTLSError("error getting peer"
604
 
                                        " certificate")
 
389
    list_size = ctypes.c_uint()
 
390
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
391
        (session._c_object, ctypes.byref(list_size))
605
392
    if list_size.value == 0:
606
393
        return None
607
394
    cert = cert_list[0]
611
398
def fingerprint(openpgp):
612
399
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
400
    # New GnuTLS "datum" with the OpenPGP public key
614
 
    datum = (gnutls.library.types
615
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
 
                                         ctypes.POINTER
617
 
                                         (ctypes.c_ubyte)),
618
 
                             ctypes.c_uint(len(openpgp))))
 
401
    datum = gnutls.library.types.gnutls_datum_t\
 
402
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
403
                     ctypes.POINTER(ctypes.c_ubyte)),
 
404
         ctypes.c_uint(len(openpgp)))
619
405
    # New empty GnuTLS certificate
620
406
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
 
    (gnutls.library.functions
622
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
407
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
408
        (ctypes.byref(crt))
623
409
    # Import the OpenPGP public key into the certificate
624
 
    (gnutls.library.functions
625
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
 
                                gnutls.library.constants
627
 
                                .GNUTLS_OPENPGP_FMT_RAW))
628
 
    # Verify the self signature in the key
629
 
    crtverify = ctypes.c_uint()
630
 
    (gnutls.library.functions
631
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
 
    if crtverify.value != 0:
633
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
410
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
411
                    (crt, ctypes.byref(datum),
 
412
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
635
413
    # New buffer for the fingerprint
636
 
    buf = ctypes.create_string_buffer(20)
637
 
    buf_len = ctypes.c_size_t()
 
414
    buffer = ctypes.create_string_buffer(20)
 
415
    buffer_length = ctypes.c_size_t()
638
416
    # Get the fingerprint from the certificate into the buffer
639
 
    (gnutls.library.functions
640
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
 
                                         ctypes.byref(buf_len)))
 
417
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
418
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
642
419
    # Deinit the certificate
643
420
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
421
    # Convert the buffer to a Python bytestring
645
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
422
    fpr = ctypes.string_at(buffer, buffer_length.value)
646
423
    # Convert the bytestring to hexadecimal notation
647
424
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
425
    return hex_fpr
649
426
 
650
427
 
651
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
652
429
    """A TCP request handler class.
653
430
    Instantiated by IPv6_TCPServer for each request to handle it.
654
431
    Note: This will run in its own forked process."""
655
432
    
656
433
    def handle(self):
657
434
        logger.info(u"TCP connection from: %s",
658
 
                    unicode(self.client_address))
659
 
        session = (gnutls.connection
660
 
                   .ClientSession(self.request,
661
 
                                  gnutls.connection
662
 
                                  .X509Credentials()))
 
435
                     unicode(self.client_address))
 
436
        session = gnutls.connection.ClientSession\
 
437
                  (self.request, gnutls.connection.X509Credentials())
663
438
        
664
439
        line = self.request.makefile().readline()
665
440
        logger.debug(u"Protocol version: %r", line)
678
453
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
454
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
455
        #                "+DHE-DSS"))
681
 
        # Use a fallback default, since this MUST be set.
682
 
        priority = self.server.settings.get("priority", "NORMAL")
683
 
        (gnutls.library.functions
684
 
         .gnutls_priority_set_direct(session._c_object,
685
 
                                     priority, None))
 
456
        priority = "NORMAL"             # Fallback default, since this
 
457
                                        # MUST be set.
 
458
        if self.server.settings["priority"]:
 
459
            priority = self.server.settings["priority"]
 
460
        gnutls.library.functions.gnutls_priority_set_direct\
 
461
            (session._c_object, priority, None);
686
462
        
687
463
        try:
688
464
            session.handshake()
691
467
            # Do not run session.bye() here: the session is not
692
468
            # established.  Just abandon the request.
693
469
            return
694
 
        logger.debug(u"Handshake succeeded")
695
470
        try:
696
471
            fpr = fingerprint(peer_certificate(session))
697
472
        except (TypeError, gnutls.errors.GNUTLSError), error:
699
474
            session.bye()
700
475
            return
701
476
        logger.debug(u"Fingerprint: %s", fpr)
702
 
        
 
477
        client = None
703
478
        for c in self.server.clients:
704
479
            if c.fingerprint == fpr:
705
480
                client = c
706
481
                break
707
 
        else:
 
482
        if not client:
708
483
            logger.warning(u"Client not found for fingerprint: %s",
709
484
                           fpr)
710
485
            session.bye()
717
492
                           vars(client))
718
493
            session.bye()
719
494
            return
720
 
        ## This won't work here, since we're in a fork.
721
 
        # client.checked_ok()
722
495
        sent_size = 0
723
496
        while sent_size < len(client.secret):
724
497
            sent = session.send(client.secret[sent_size:])
729
502
        session.bye()
730
503
 
731
504
 
732
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
 
                     SocketServer.TCPServer, object):
 
505
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
734
506
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
735
507
    Attributes:
736
508
        settings:       Server settings
737
509
        clients:        Set() of Client objects
738
 
        enabled:        Boolean; whether this server is activated yet
739
510
    """
740
511
    address_family = socket.AF_INET6
741
512
    def __init__(self, *args, **kwargs):
745
516
        if "clients" in kwargs:
746
517
            self.clients = kwargs["clients"]
747
518
            del kwargs["clients"]
748
 
        self.enabled = False
749
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
519
        return super(type(self), self).__init__(*args, **kwargs)
750
520
    def server_bind(self):
751
521
        """This overrides the normal server_bind() function
752
522
        to bind to an interface if one was specified, and also NOT to
781
551
#                                            if_nametoindex
782
552
#                                            (self.settings
783
553
#                                             ["interface"]))
784
 
            return super(IPv6_TCPServer, self).server_bind()
785
 
    def server_activate(self):
786
 
        if self.enabled:
787
 
            return super(IPv6_TCPServer, self).server_activate()
788
 
    def enable(self):
789
 
        self.enabled = True
 
554
            return super(type(self), self).server_bind()
790
555
 
791
556
 
792
557
def string_to_delta(interval):
793
558
    """Parse a string and return a datetime.timedelta
794
 
    
 
559
 
795
560
    >>> string_to_delta('7d')
796
561
    datetime.timedelta(7)
797
562
    >>> string_to_delta('60s')
808
573
    timevalue = datetime.timedelta(0)
809
574
    for s in interval.split():
810
575
        try:
811
 
            suffix = unicode(s[-1])
812
 
            value = int(s[:-1])
 
576
            suffix=unicode(s[-1])
 
577
            value=int(s[:-1])
813
578
            if suffix == u"d":
814
579
                delta = datetime.timedelta(value)
815
580
            elif suffix == u"s":
831
596
def server_state_changed(state):
832
597
    """Derived from the Avahi example code"""
833
598
    if state == avahi.SERVER_COLLISION:
834
 
        logger.error(u"Zeroconf server name collision")
 
599
        logger.error(u"Server name collision")
835
600
        service.remove()
836
601
    elif state == avahi.SERVER_RUNNING:
837
602
        service.add()
839
604
 
840
605
def entry_group_state_changed(state, error):
841
606
    """Derived from the Avahi example code"""
842
 
    logger.debug(u"Avahi state change: %i", state)
 
607
    logger.debug(u"state change: %i", state)
843
608
    
844
609
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
 
        logger.debug(u"Zeroconf service established.")
 
610
        logger.debug(u"Service established.")
846
611
    elif state == avahi.ENTRY_GROUP_COLLISION:
847
 
        logger.warning(u"Zeroconf service name collision.")
 
612
        logger.warning(u"Service name collision.")
848
613
        service.rename()
849
614
    elif state == avahi.ENTRY_GROUP_FAILURE:
850
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
615
        logger.critical(u"Error in group state changed %s",
851
616
                        unicode(error))
852
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
617
        raise AvahiGroupError("State changed: %s", str(error))
853
618
 
854
619
def if_nametoindex(interface):
855
620
    """Call the C function if_nametoindex(), or equivalent"""
856
621
    global if_nametoindex
857
622
    try:
858
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
859
 
                          (ctypes.util.find_library("c"))
860
 
                          .if_nametoindex)
 
623
        if "ctypes.util" not in sys.modules:
 
624
            import ctypes.util
 
625
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
626
            (ctypes.util.find_library("c")).if_nametoindex
861
627
    except (OSError, AttributeError):
862
628
        if "struct" not in sys.modules:
863
629
            import struct
866
632
        def if_nametoindex(interface):
867
633
            "Get an interface index the hard way, i.e. using fcntl()"
868
634
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
869
 
            with closing(socket.socket()) as s:
870
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
 
                                    struct.pack("16s16x", interface))
 
635
            s = socket.socket()
 
636
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
637
                                struct.pack("16s16x", interface))
 
638
            s.close()
872
639
            interface_index = struct.unpack("I", ifreq[16:20])[0]
873
640
            return interface_index
874
641
    return if_nametoindex(interface)
898
665
 
899
666
 
900
667
def main():
901
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
668
    global main_loop_started
 
669
    main_loop_started = False
 
670
    
 
671
    parser = OptionParser(version = "%%prog %s" % version)
902
672
    parser.add_option("-i", "--interface", type="string",
903
673
                      metavar="IF", help="Bind to interface IF")
904
674
    parser.add_option("-a", "--address", type="string",
905
675
                      help="Address to listen for requests on")
906
676
    parser.add_option("-p", "--port", type="int",
907
677
                      help="Port number to receive requests on")
908
 
    parser.add_option("--check", action="store_true",
 
678
    parser.add_option("--check", action="store_true", default=False,
909
679
                      help="Run self-test")
910
680
    parser.add_option("--debug", action="store_true",
911
681
                      help="Debug mode; run in foreground and log to"
918
688
                      default="/etc/mandos", metavar="DIR",
919
689
                      help="Directory to search for configuration"
920
690
                      " files")
921
 
    parser.add_option("--no-dbus", action="store_false",
922
 
                      dest="use_dbus",
923
 
                      help="Do not provide D-Bus system bus"
924
 
                      " interface")
925
 
    options = parser.parse_args()[0]
 
691
    (options, args) = parser.parse_args()
926
692
    
927
693
    if options.check:
928
694
        import doctest
937
703
                        "priority":
938
704
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
705
                        "servicename": "Mandos",
940
 
                        "use_dbus": "True",
941
706
                        }
942
707
    
943
708
    # Parse config file for server-global settings
946
711
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
947
712
    # Convert the SafeConfigParser object to a dict
948
713
    server_settings = server_config.defaults()
949
 
    # Use the appropriate methods on the non-string config options
950
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
951
 
                                                        "debug")
952
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
 
                                                           "use_dbus")
954
 
    if server_settings["port"]:
955
 
        server_settings["port"] = server_config.getint("DEFAULT",
956
 
                                                       "port")
 
714
    # Use getboolean on the boolean config option
 
715
    server_settings["debug"] = server_config.getboolean\
 
716
                               ("DEFAULT", "debug")
957
717
    del server_config
958
718
    
959
719
    # Override the settings from the config file with command line
960
720
    # options, if set.
961
721
    for option in ("interface", "address", "port", "debug",
962
 
                   "priority", "servicename", "configdir",
963
 
                   "use_dbus"):
 
722
                   "priority", "servicename", "configdir"):
964
723
        value = getattr(options, option)
965
724
        if value is not None:
966
725
            server_settings[option] = value
967
726
    del options
968
727
    # Now we have our good server settings in "server_settings"
969
728
    
970
 
    # For convenience
971
729
    debug = server_settings["debug"]
972
 
    use_dbus = server_settings["use_dbus"]
973
 
 
974
 
    def sigsegvhandler(signum, frame):
975
 
        raise RuntimeError('Segmentation fault')
976
730
    
977
731
    if not debug:
978
732
        syslogger.setLevel(logging.WARNING)
979
733
        console.setLevel(logging.WARNING)
980
 
    else:
981
 
        signal.signal(signal.SIGSEGV, sigsegvhandler)
982
734
    
983
735
    if server_settings["servicename"] != "Mandos":
984
 
        syslogger.setFormatter(logging.Formatter
 
736
        syslogger.setFormatter(logging.Formatter\
985
737
                               ('Mandos (%s): %%(levelname)s:'
986
738
                                ' %%(message)s'
987
739
                                % server_settings["servicename"]))
989
741
    # Parse config file with clients
990
742
    client_defaults = { "timeout": "1h",
991
743
                        "interval": "5m",
992
 
                        "checker": "fping -q -- %%(host)s",
 
744
                        "checker": "fping -q -- %(host)s",
993
745
                        "host": "",
994
746
                        }
995
747
    client_config = ConfigParser.SafeConfigParser(client_defaults)
996
748
    client_config.read(os.path.join(server_settings["configdir"],
997
749
                                    "clients.conf"))
998
750
    
999
 
    clients = Set()
1000
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1001
 
                                 server_settings["port"]),
1002
 
                                TCP_handler,
1003
 
                                settings=server_settings,
1004
 
                                clients=clients)
1005
 
    pidfilename = "/var/run/mandos.pid"
1006
 
    try:
1007
 
        pidfile = open(pidfilename, "w")
1008
 
    except IOError, error:
1009
 
        logger.error("Could not open file %r", pidfilename)
1010
 
    
1011
 
    try:
1012
 
        uid = pwd.getpwnam("_mandos").pw_uid
1013
 
        gid = pwd.getpwnam("_mandos").pw_gid
1014
 
    except KeyError:
1015
 
        try:
1016
 
            uid = pwd.getpwnam("mandos").pw_uid
1017
 
            gid = pwd.getpwnam("mandos").pw_gid
1018
 
        except KeyError:
1019
 
            try:
1020
 
                uid = pwd.getpwnam("nobody").pw_uid
1021
 
                gid = pwd.getpwnam("nogroup").pw_gid
1022
 
            except KeyError:
1023
 
                uid = 65534
1024
 
                gid = 65534
1025
 
    try:
1026
 
        os.setgid(gid)
1027
 
        os.setuid(uid)
1028
 
    except OSError, error:
1029
 
        if error[0] != errno.EPERM:
1030
 
            raise error
1031
 
    
1032
 
    # Enable all possible GnuTLS debugging
1033
 
    if debug:
1034
 
        # "Use a log level over 10 to enable all debugging options."
1035
 
        # - GnuTLS manual
1036
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1037
 
        
1038
 
        @gnutls.library.types.gnutls_log_func
1039
 
        def debug_gnutls(level, string):
1040
 
            logger.debug("GnuTLS: %s", string[:-1])
1041
 
        
1042
 
        (gnutls.library.functions
1043
 
         .gnutls_global_set_log_function(debug_gnutls))
1044
 
    
1045
751
    global service
1046
752
    service = AvahiService(name = server_settings["servicename"],
1047
 
                           servicetype = "_mandos._tcp", )
 
753
                           type = "_mandos._tcp", );
1048
754
    if server_settings["interface"]:
1049
 
        service.interface = (if_nametoindex
1050
 
                             (server_settings["interface"]))
 
755
        service.interface = if_nametoindex(server_settings["interface"])
1051
756
    
1052
757
    global main_loop
1053
758
    global bus
1056
761
    DBusGMainLoop(set_as_default=True )
1057
762
    main_loop = gobject.MainLoop()
1058
763
    bus = dbus.SystemBus()
1059
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
 
                                           avahi.DBUS_PATH_SERVER),
1061
 
                            avahi.DBUS_INTERFACE_SERVER)
 
764
    server = dbus.Interface(
 
765
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
766
            avahi.DBUS_INTERFACE_SERVER )
1062
767
    # End of Avahi example code
1063
 
    if use_dbus:
1064
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
768
    
 
769
    clients = Set()
 
770
    def remove_from_clients(client):
 
771
        clients.remove(client)
 
772
        if not clients:
 
773
            logger.critical(u"No clients left, exiting")
 
774
            sys.exit()
1065
775
    
1066
776
    clients.update(Set(Client(name = section,
 
777
                              stop_hook = remove_from_clients,
1067
778
                              config
1068
 
                              = dict(client_config.items(section)),
1069
 
                              use_dbus = use_dbus)
 
779
                              = dict(client_config.items(section)))
1070
780
                       for section in client_config.sections()))
1071
781
    if not clients:
1072
 
        logger.warning(u"No clients defined")
 
782
        logger.critical(u"No clients defined")
 
783
        sys.exit(1)
1073
784
    
1074
785
    if debug:
1075
786
        # Redirect stdin so all checkers get /dev/null
1083
794
        # Close all input and output, do double fork, etc.
1084
795
        daemon()
1085
796
    
 
797
    pidfilename = "/var/run/mandos/mandos.pid"
 
798
    pid = os.getpid()
1086
799
    try:
1087
 
        pid = os.getpid()
 
800
        pidfile = open(pidfilename, "w")
1088
801
        pidfile.write(str(pid) + "\n")
1089
802
        pidfile.close()
1090
803
        del pidfile
1091
 
    except IOError:
1092
 
        logger.error(u"Could not write to file %r with PID %d",
1093
 
                     pidfilename, pid)
1094
 
    except NameError:
1095
 
        # "pidfile" was never created
1096
 
        pass
1097
 
    del pidfilename
 
804
    except IOError, err:
 
805
        logger.error(u"Could not write %s file with PID %d",
 
806
                     pidfilename, os.getpid())
1098
807
    
1099
808
    def cleanup():
1100
809
        "Cleanup function; run on exit"
1107
816
        
1108
817
        while clients:
1109
818
            client = clients.pop()
1110
 
            client.disable_hook = None
1111
 
            client.disable()
 
819
            client.stop_hook = None
 
820
            client.stop()
1112
821
    
1113
822
    atexit.register(cleanup)
1114
823
    
1117
826
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
827
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
828
    
1120
 
    if use_dbus:
1121
 
        class MandosServer(dbus.service.Object):
1122
 
            """A D-Bus proxy object"""
1123
 
            def __init__(self):
1124
 
                dbus.service.Object.__init__(self, bus, "/")
1125
 
            _interface = u"se.bsnet.fukt.Mandos"
1126
 
            
1127
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1128
 
            def ClientAdded(self, objpath, properties):
1129
 
                "D-Bus signal"
1130
 
                pass
1131
 
            
1132
 
            @dbus.service.signal(_interface, signature="os")
1133
 
            def ClientRemoved(self, objpath, name):
1134
 
                "D-Bus signal"
1135
 
                pass
1136
 
            
1137
 
            @dbus.service.method(_interface, out_signature="ao")
1138
 
            def GetAllClients(self):
1139
 
                "D-Bus method"
1140
 
                return dbus.Array(c.dbus_object_path for c in clients)
1141
 
            
1142
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1143
 
            def GetAllClientsWithProperties(self):
1144
 
                "D-Bus method"
1145
 
                return dbus.Dictionary(
1146
 
                    ((c.dbus_object_path, c.GetAllProperties())
1147
 
                     for c in clients),
1148
 
                    signature="oa{sv}")
1149
 
            
1150
 
            @dbus.service.method(_interface, in_signature="o")
1151
 
            def RemoveClient(self, object_path):
1152
 
                "D-Bus method"
1153
 
                for c in clients:
1154
 
                    if c.dbus_object_path == object_path:
1155
 
                        clients.remove(c)
1156
 
                        # Don't signal anything except ClientRemoved
1157
 
                        c.use_dbus = False
1158
 
                        c.disable()
1159
 
                        # Emit D-Bus signal
1160
 
                        self.ClientRemoved(object_path, c.name)
1161
 
                        return
1162
 
                raise KeyError
1163
 
            
1164
 
            del _interface
1165
 
        
1166
 
        mandos_server = MandosServer()
1167
 
    
1168
829
    for client in clients:
1169
 
        if use_dbus:
1170
 
            # Emit D-Bus signal
1171
 
            mandos_server.ClientAdded(client.dbus_object_path,
1172
 
                                      client.GetAllProperties())
1173
 
        client.enable()
1174
 
    
1175
 
    tcp_server.enable()
1176
 
    tcp_server.server_activate()
1177
 
    
 
830
        client.start()
 
831
    
 
832
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
833
                                 server_settings["port"]),
 
834
                                tcp_handler,
 
835
                                settings=server_settings,
 
836
                                clients=clients)
1178
837
    # Find out what port we got
1179
838
    service.port = tcp_server.socket.getsockname()[1]
1180
839
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1194
853
        
1195
854
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1196
855
                             lambda *args, **kwargs:
1197
 
                             (tcp_server.handle_request
1198
 
                              (*args[2:], **kwargs) or True))
 
856
                             tcp_server.handle_request\
 
857
                             (*args[2:], **kwargs) or True)
1199
858
        
1200
859
        logger.debug(u"Starting main loop")
 
860
        main_loop_started = True
1201
861
        main_loop.run()
1202
862
    except AvahiError, error:
1203
 
        logger.critical(u"AvahiError: %s", error)
 
863
        logger.critical(u"AvahiError: %s" + unicode(error))
1204
864
        sys.exit(1)
1205
865
    except KeyboardInterrupt:
1206
866
        if debug: