/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-12 22:02:33 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090112220233-lawxo4uvyzb38u1f
* README (The Plugin System): Removed redundant text about options and
                              files for the plugins, this is now
                              documented in the manuals for the
                              plugins.

* plugins.d/mandos-client.c (main): Remove comment which was copied
                                    from another program by mistake.
                                    Use "sscanf" instead of "strtol"
                                    to parse numbers; this uses the
                                    correct type instead of casting.
                                    Don't report errors when removing
                                    temporary directory if directory
                                    is already gone.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
13
# 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
38
from optparse import OptionParser
38
39
import datetime
39
40
import errno
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
 
64
 
version = "1.0"
 
69
version = "1.0.3"
65
70
 
66
71
logger = logging.Logger('mandos')
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'))
 
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'))
72
77
logger.addHandler(syslogger)
73
78
 
74
79
console = logging.StreamHandler()
77
82
logger.addHandler(console)
78
83
 
79
84
class AvahiError(Exception):
80
 
    def __init__(self, value):
 
85
    def __init__(self, value, *args, **kwargs):
81
86
        self.value = value
82
 
    def __str__(self):
83
 
        return repr(self.value)
 
87
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
88
    def __unicode__(self):
 
89
        return unicode(repr(self.value))
84
90
 
85
91
class AvahiServiceError(AvahiError):
86
92
    pass
106
112
                  a sensible number of times
107
113
    """
108
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
 
                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
115
                 servicetype = None, port = None, TXT = None,
 
116
                 domain = "", host = "", max_renames = 32768):
111
117
        self.interface = interface
112
118
        self.name = name
113
 
        self.type = type
 
119
        self.type = servicetype
114
120
        self.port = port
115
 
        if TXT is None:
116
 
            self.TXT = []
117
 
        else:
118
 
            self.TXT = TXT
 
121
        self.TXT = TXT if TXT is not None else []
119
122
        self.domain = domain
120
123
        self.host = host
121
124
        self.rename_count = 0
 
125
        self.max_renames = max_renames
122
126
    def rename(self):
123
127
        """Derived from the Avahi example code"""
124
128
        if self.rename_count >= self.max_renames:
125
 
            logger.critical(u"No suitable service name found after %i"
126
 
                            u" retries, exiting.", rename_count)
127
 
            raise AvahiServiceError("Too many renames")
128
 
        name = server.GetAlternativeServiceName(name)
129
 
        logger.error(u"Changing name to %r ...", name)
130
 
        syslogger.setFormatter(logging.Formatter\
 
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
131
137
                               ('Mandos (%s): %%(levelname)s:'
132
 
                               ' %%(message)s' % name))
 
138
                                ' %%(message)s' % self.name))
133
139
        self.remove()
134
140
        self.add()
135
141
        self.rename_count += 1
141
147
        """Derived from the Avahi example code"""
142
148
        global group
143
149
        if group is None:
144
 
            group = dbus.Interface\
145
 
                    (bus.get_object(avahi.DBUS_NAME,
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
146
152
                                    server.EntryGroupNew()),
147
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
154
            group.connect_to_signal('StateChanged',
149
155
                                    entry_group_state_changed)
150
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
151
157
                     service.name, service.type)
152
158
        group.AddService(
153
159
                self.interface,         # interface
164
170
# End of Avahi example code
165
171
 
166
172
 
167
 
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):
168
179
    """A representation of a client host served by this server.
169
180
    Attributes:
170
 
    name:      string; from the config file, used in log messages
 
181
    name:       string; from the config file, used in log messages
171
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
172
183
                 uniquely identify the client
173
 
    secret:    bytestring; sent verbatim (over TLS) to client
174
 
    host:      string; available for use by the checker command
175
 
    created:   datetime.datetime(); object creation, not client host
176
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
177
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
178
 
                                     until this client is invalid
179
 
    interval:  datetime.timedelta(); How often to start a new checker
180
 
    stop_hook: If set, called by stop() as stop_hook(self)
181
 
    checker:   subprocess.Popen(); a running checker process used
182
 
                                   to see if the client lives.
183
 
                                   '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.
184
197
    checker_initiator_tag: a gobject event source tag, or None
185
 
    stop_initiator_tag:    - '' -
 
198
    disable_initiator_tag:    - '' -
186
199
    checker_callback_tag:  - '' -
187
200
    checker_command: string; External command which is run to check if
188
201
                     client lives.  %() expansions are done at
189
202
                     runtime with vars(self) as dict, so that for
190
203
                     instance %(name)s can be used in the command.
191
 
    Private attibutes:
192
 
    _timeout: Real variable for 'timeout'
193
 
    _interval: Real variable for 'interval'
194
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
195
 
    _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
196
206
    """
197
 
    def _set_timeout(self, timeout):
198
 
        "Setter function for 'timeout' attribute"
199
 
        self._timeout = timeout
200
 
        self._timeout_milliseconds = ((self.timeout.days
201
 
                                       * 24 * 60 * 60 * 1000)
202
 
                                      + (self.timeout.seconds * 1000)
203
 
                                      + (self.timeout.microseconds
204
 
                                         // 1000))
205
 
    timeout = property(lambda self: self._timeout,
206
 
                       _set_timeout)
207
 
    del _set_timeout
208
 
    def _set_interval(self, interval):
209
 
        "Setter function for 'interval' attribute"
210
 
        self._interval = interval
211
 
        self._interval_milliseconds = ((self.interval.days
212
 
                                        * 24 * 60 * 60 * 1000)
213
 
                                       + (self.interval.seconds
214
 
                                          * 1000)
215
 
                                       + (self.interval.microseconds
216
 
                                          // 1000))
217
 
    interval = property(lambda self: self._interval,
218
 
                        _set_interval)
219
 
    del _set_interval
220
 
    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):
221
221
        """Note: the 'checker' key in 'config' sets the
222
222
        'checker_command' attribute and *not* the 'checker'
223
223
        attribute."""
224
224
        self.name = name
 
225
        if config is None:
 
226
            config = {}
225
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)
226
235
        # Uppercase and remove spaces from fingerprint for later
227
236
        # comparison purposes with return value from the fingerprint()
228
237
        # function
229
 
        self.fingerprint = config["fingerprint"].upper()\
230
 
                           .replace(u" ", u"")
 
238
        self.fingerprint = (config["fingerprint"].upper()
 
239
                            .replace(u" ", u""))
231
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
232
241
        if "secret" in config:
233
242
            self.secret = config["secret"].decode(u"base64")
234
243
        elif "secfile" in config:
235
 
            sf = open(config["secfile"])
236
 
            self.secret = sf.read()
237
 
            sf.close()
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
 
247
                self.secret = secfile.read()
238
248
        else:
239
249
            raise TypeError(u"No secret or secfile for client %s"
240
250
                            % self.name)
241
251
        self.host = config.get("host", "")
242
 
        self.created = datetime.datetime.now()
 
252
        self.created = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
243
255
        self.last_checked_ok = None
244
256
        self.timeout = string_to_delta(config["timeout"])
245
257
        self.interval = string_to_delta(config["interval"])
246
 
        self.stop_hook = stop_hook
 
258
        self.disable_hook = disable_hook
247
259
        self.checker = None
248
260
        self.checker_initiator_tag = None
249
 
        self.stop_initiator_tag = None
 
261
        self.disable_initiator_tag = None
250
262
        self.checker_callback_tag = None
251
 
        self.check_command = config["checker"]
252
 
    def start(self):
 
263
        self.checker_command = config["checker"]
 
264
    
 
265
    def enable(self):
253
266
        """Start this client's checker and timeout hooks"""
 
267
        self.last_enabled = datetime.datetime.utcnow()
254
268
        # Schedule a new checker to be started an 'interval' from now,
255
269
        # and every interval from then on.
256
 
        self.checker_initiator_tag = gobject.timeout_add\
257
 
                                     (self._interval_milliseconds,
258
 
                                      self.start_checker)
 
270
        self.checker_initiator_tag = (gobject.timeout_add
 
271
                                      (self.interval_milliseconds(),
 
272
                                       self.start_checker))
259
273
        # Also start a new checker *right now*.
260
274
        self.start_checker()
261
 
        # Schedule a stop() when 'timeout' has passed
262
 
        self.stop_initiator_tag = gobject.timeout_add\
263
 
                                  (self._timeout_milliseconds,
264
 
                                   self.stop)
265
 
    def stop(self):
266
 
        """Stop this client.
267
 
        The possibility that a client might be restarted is left open,
268
 
        but not currently used."""
269
 
        # If this client doesn't have a secret, it is already stopped.
270
 
        if hasattr(self, "secret") and self.secret:
271
 
            logger.info(u"Stopping client %s", self.name)
272
 
            self.secret = None
273
 
        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):
274
291
            return False
275
 
        if getattr(self, "stop_initiator_tag", False):
276
 
            gobject.source_remove(self.stop_initiator_tag)
277
 
            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
278
296
        if getattr(self, "checker_initiator_tag", False):
279
297
            gobject.source_remove(self.checker_initiator_tag)
280
298
            self.checker_initiator_tag = None
281
299
        self.stop_checker()
282
 
        if self.stop_hook:
283
 
            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))
284
307
        # Do not run this again if called by a gobject.timeout_add
285
308
        return False
 
309
    
286
310
    def __del__(self):
287
 
        self.stop_hook = None
288
 
        self.stop()
289
 
    def checker_callback(self, pid, condition):
 
311
        self.disable_hook = None
 
312
        self.disable()
 
313
    
 
314
    def checker_callback(self, pid, condition, command):
290
315
        """The checker has completed, so take appropriate actions."""
291
 
        now = datetime.datetime.now()
292
316
        self.checker_callback_tag = None
293
317
        self.checker = None
294
 
        if os.WIFEXITED(condition) \
295
 
               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)):
296
324
            logger.info(u"Checker for %(name)s succeeded",
297
325
                        vars(self))
298
 
            self.last_checked_ok = now
299
 
            gobject.source_remove(self.stop_initiator_tag)
300
 
            self.stop_initiator_tag = gobject.timeout_add\
301
 
                                      (self._timeout_milliseconds,
302
 
                                       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()
303
332
        elif not os.WIFEXITED(condition):
304
333
            logger.warning(u"Checker for %(name)s crashed?",
305
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))
306
340
        else:
307
341
            logger.info(u"Checker for %(name)s failed",
308
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
    
309
366
    def start_checker(self):
310
367
        """Start a new checker subprocess if one is not running.
311
368
        If a checker already exists, leave it running and do
320
377
        # is as it should be.
321
378
        if self.checker is None:
322
379
            try:
323
 
                # In case check_command has exactly one % operator
324
 
                command = self.check_command % self.host
 
380
                # In case checker_command has exactly one % operator
 
381
                command = self.checker_command % self.host
325
382
            except TypeError:
326
383
                # Escape attributes for the shell
327
384
                escaped_attrs = dict((key, re.escape(str(val)))
328
385
                                     for key, val in
329
386
                                     vars(self).iteritems())
330
387
                try:
331
 
                    command = self.check_command % escaped_attrs
 
388
                    command = self.checker_command % escaped_attrs
332
389
                except TypeError, error:
333
390
                    logger.error(u'Could not format string "%s":'
334
 
                                 u' %s', self.check_command, error)
 
391
                                 u' %s', self.checker_command, error)
335
392
                    return True # Try again later
336
393
            try:
337
394
                logger.info(u"Starting checker %r for %s",
338
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.)
339
400
                self.checker = subprocess.Popen(command,
340
401
                                                close_fds=True,
341
402
                                                shell=True, cwd="/")
342
 
                self.checker_callback_tag = gobject.child_watch_add\
343
 
                                            (self.checker.pid,
344
 
                                             self.checker_callback)
345
 
            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:
346
414
                logger.error(u"Failed to start subprocess: %s",
347
415
                             error)
348
416
        # Re-run this periodically if run by gobject.timeout_add
349
417
        return True
 
418
    
350
419
    def stop_checker(self):
351
420
        """Force the checker process, if any, to stop."""
352
421
        if self.checker_callback_tag:
364
433
            if error.errno != errno.ESRCH: # No such process
365
434
                raise
366
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
    
367
440
    def still_valid(self):
368
441
        """Has the timeout not yet passed for this client?"""
369
 
        now = datetime.datetime.now()
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
370
445
        if self.last_checked_ok is None:
371
446
            return now < (self.created + self.timeout)
372
447
        else:
373
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
374
584
 
375
585
 
376
586
def peer_certificate(session):
377
587
    "Return the peer's OpenPGP certificate as a bytestring"
378
588
    # If not an OpenPGP certificate...
379
 
    if gnutls.library.functions.gnutls_certificate_type_get\
380
 
            (session._c_object) \
381
 
           != 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):
382
592
        # ...do the normal thing
383
593
        return session.peer_certificate
384
594
    list_size = ctypes.c_uint()
385
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
 
        (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)))
387
598
    if list_size.value == 0:
388
599
        return None
389
600
    cert = cert_list[0]
393
604
def fingerprint(openpgp):
394
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
606
    # New GnuTLS "datum" with the OpenPGP public key
396
 
    datum = gnutls.library.types.gnutls_datum_t\
397
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
398
 
                     ctypes.POINTER(ctypes.c_ubyte)),
399
 
         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))))
400
612
    # New empty GnuTLS certificate
401
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
403
 
        (ctypes.byref(crt))
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
404
616
    # Import the OpenPGP public key into the certificate
405
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
406
 
                    (crt, ctypes.byref(datum),
407
 
                     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")
408
628
    # New buffer for the fingerprint
409
 
    buffer = ctypes.create_string_buffer(20)
410
 
    buffer_length = ctypes.c_size_t()
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
411
631
    # Get the fingerprint from the certificate into the buffer
412
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
 
        (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)))
414
635
    # Deinit the certificate
415
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
637
    # Convert the buffer to a Python bytestring
417
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
418
639
    # Convert the bytestring to hexadecimal notation
419
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
641
    return hex_fpr
421
642
 
422
643
 
423
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
424
645
    """A TCP request handler class.
425
646
    Instantiated by IPv6_TCPServer for each request to handle it.
426
647
    Note: This will run in its own forked process."""
427
648
    
428
649
    def handle(self):
429
650
        logger.info(u"TCP connection from: %s",
430
 
                     unicode(self.client_address))
431
 
        session = gnutls.connection.ClientSession\
432
 
                  (self.request, gnutls.connection.X509Credentials())
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
433
656
        
434
657
        line = self.request.makefile().readline()
435
658
        logger.debug(u"Protocol version: %r", line)
448
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
673
        #                "+DHE-DSS"))
451
 
        priority = "NORMAL"             # Fallback default, since this
452
 
                                        # MUST be set.
453
 
        if self.server.settings["priority"]:
454
 
            priority = self.server.settings["priority"]
455
 
        gnutls.library.functions.gnutls_priority_set_direct\
456
 
            (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))
457
679
        
458
680
        try:
459
681
            session.handshake()
469
691
            session.bye()
470
692
            return
471
693
        logger.debug(u"Fingerprint: %s", fpr)
472
 
        client = None
473
694
        for c in self.server.clients:
474
695
            if c.fingerprint == fpr:
475
696
                client = c
476
697
                break
477
 
        if not client:
 
698
        else:
478
699
            logger.warning(u"Client not found for fingerprint: %s",
479
700
                           fpr)
480
701
            session.bye()
487
708
                           vars(client))
488
709
            session.bye()
489
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
490
713
        sent_size = 0
491
714
        while sent_size < len(client.secret):
492
715
            sent = session.send(client.secret[sent_size:])
497
720
        session.bye()
498
721
 
499
722
 
500
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
501
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
502
726
    Attributes:
503
727
        settings:       Server settings
504
728
        clients:        Set() of Client objects
 
729
        enabled:        Boolean; whether this server is activated yet
505
730
    """
506
731
    address_family = socket.AF_INET6
507
732
    def __init__(self, *args, **kwargs):
511
736
        if "clients" in kwargs:
512
737
            self.clients = kwargs["clients"]
513
738
            del kwargs["clients"]
514
 
        return super(type(self), self).__init__(*args, **kwargs)
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
515
741
    def server_bind(self):
516
742
        """This overrides the normal server_bind() function
517
743
        to bind to an interface if one was specified, and also NOT to
546
772
#                                            if_nametoindex
547
773
#                                            (self.settings
548
774
#                                             ["interface"]))
549
 
            return super(type(self), self).server_bind()
 
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
550
781
 
551
782
 
552
783
def string_to_delta(interval):
562
793
    datetime.timedelta(1)
563
794
    >>> string_to_delta(u'1w')
564
795
    datetime.timedelta(7)
 
796
    >>> string_to_delta('5m 30s')
 
797
    datetime.timedelta(0, 330)
565
798
    """
566
 
    try:
567
 
        suffix=unicode(interval[-1])
568
 
        value=int(interval[:-1])
569
 
        if suffix == u"d":
570
 
            delta = datetime.timedelta(value)
571
 
        elif suffix == u"s":
572
 
            delta = datetime.timedelta(0, value)
573
 
        elif suffix == u"m":
574
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
575
 
        elif suffix == u"h":
576
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
 
        elif suffix == u"w":
578
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
 
        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):
580
817
            raise ValueError
581
 
    except (ValueError, IndexError):
582
 
        raise ValueError
583
 
    return delta
 
818
        timevalue += delta
 
819
    return timevalue
584
820
 
585
821
 
586
822
def server_state_changed(state):
587
823
    """Derived from the Avahi example code"""
588
824
    if state == avahi.SERVER_COLLISION:
589
 
        logger.error(u"Server name collision")
 
825
        logger.error(u"Zeroconf server name collision")
590
826
        service.remove()
591
827
    elif state == avahi.SERVER_RUNNING:
592
828
        service.add()
594
830
 
595
831
def entry_group_state_changed(state, error):
596
832
    """Derived from the Avahi example code"""
597
 
    logger.debug(u"state change: %i", state)
 
833
    logger.debug(u"Avahi state change: %i", state)
598
834
    
599
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
 
        logger.debug(u"Service established.")
 
836
        logger.debug(u"Zeroconf service established.")
601
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
602
 
        logger.warning(u"Service name collision.")
 
838
        logger.warning(u"Zeroconf service name collision.")
603
839
        service.rename()
604
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
605
 
        logger.critical(u"Error in group state changed %s",
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
606
842
                        unicode(error))
607
 
        raise AvahiGroupError("State changed: %s", str(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
608
844
 
609
845
def if_nametoindex(interface):
610
846
    """Call the C function if_nametoindex(), or equivalent"""
611
847
    global if_nametoindex
612
848
    try:
613
 
        if "ctypes.util" not in sys.modules:
614
 
            import ctypes.util
615
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
616
 
            (ctypes.util.find_library("c")).if_nametoindex
 
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
850
                          (ctypes.util.find_library("c"))
 
851
                          .if_nametoindex)
617
852
    except (OSError, AttributeError):
618
853
        if "struct" not in sys.modules:
619
854
            import struct
622
857
        def if_nametoindex(interface):
623
858
            "Get an interface index the hard way, i.e. using fcntl()"
624
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
625
 
            s = socket.socket()
626
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
 
                                struct.pack("16s16x", interface))
628
 
            s.close()
 
860
            with closing(socket.socket()) as s:
 
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
862
                                    struct.pack("16s16x", interface))
629
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
630
864
            return interface_index
631
865
    return if_nametoindex(interface)
655
889
 
656
890
 
657
891
def main():
658
 
    global main_loop_started
659
 
    main_loop_started = False
660
 
    
661
892
    parser = OptionParser(version = "%%prog %s" % version)
662
893
    parser.add_option("-i", "--interface", type="string",
663
894
                      metavar="IF", help="Bind to interface IF")
665
896
                      help="Address to listen for requests on")
666
897
    parser.add_option("-p", "--port", type="int",
667
898
                      help="Port number to receive requests on")
668
 
    parser.add_option("--check", action="store_true", default=False,
 
899
    parser.add_option("--check", action="store_true",
669
900
                      help="Run self-test")
670
901
    parser.add_option("--debug", action="store_true",
671
902
                      help="Debug mode; run in foreground and log to"
678
909
                      default="/etc/mandos", metavar="DIR",
679
910
                      help="Directory to search for configuration"
680
911
                      " files")
681
 
    (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]
682
917
    
683
918
    if options.check:
684
919
        import doctest
693
928
                        "priority":
694
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
930
                        "servicename": "Mandos",
 
931
                        "use_dbus": "True",
696
932
                        }
697
933
    
698
934
    # Parse config file for server-global settings
699
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
700
936
    del server_defaults
701
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
 
    server_section = "server"
703
938
    # Convert the SafeConfigParser object to a dict
704
 
    server_settings = dict(server_config.items(server_section))
705
 
    # Use getboolean on the boolean config option
706
 
    server_settings["debug"] = server_config.getboolean\
707
 
                               (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"))
708
945
    del server_config
709
946
    
710
947
    # Override the settings from the config file with command line
711
948
    # options, if set.
712
949
    for option in ("interface", "address", "port", "debug",
713
 
                   "priority", "servicename", "configdir"):
 
950
                   "priority", "servicename", "configdir",
 
951
                   "use_dbus"):
714
952
        value = getattr(options, option)
715
953
        if value is not None:
716
954
            server_settings[option] = value
717
955
    del options
718
956
    # Now we have our good server settings in "server_settings"
719
957
    
 
958
    # For convenience
720
959
    debug = server_settings["debug"]
 
960
    use_dbus = server_settings["use_dbus"]
721
961
    
722
962
    if not debug:
723
963
        syslogger.setLevel(logging.WARNING)
724
964
        console.setLevel(logging.WARNING)
725
965
    
726
966
    if server_settings["servicename"] != "Mandos":
727
 
        syslogger.setFormatter(logging.Formatter\
 
967
        syslogger.setFormatter(logging.Formatter
728
968
                               ('Mandos (%s): %%(levelname)s:'
729
969
                                ' %%(message)s'
730
970
                                % server_settings["servicename"]))
733
973
    client_defaults = { "timeout": "1h",
734
974
                        "interval": "5m",
735
975
                        "checker": "fping -q -- %%(host)s",
 
976
                        "host": "",
736
977
                        }
737
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
738
979
    client_config.read(os.path.join(server_settings["configdir"],
739
980
                                    "clients.conf"))
740
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
    
741
1015
    global service
742
1016
    service = AvahiService(name = server_settings["servicename"],
743
 
                           type = "_mandos._tcp", );
 
1017
                           servicetype = "_mandos._tcp", )
744
1018
    if server_settings["interface"]:
745
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
746
1021
    
747
1022
    global main_loop
748
1023
    global bus
751
1026
    DBusGMainLoop(set_as_default=True )
752
1027
    main_loop = gobject.MainLoop()
753
1028
    bus = dbus.SystemBus()
754
 
    server = dbus.Interface(
755
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
 
            avahi.DBUS_INTERFACE_SERVER )
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
757
1032
    # End of Avahi example code
758
 
    
759
 
    clients = Set()
760
 
    def remove_from_clients(client):
761
 
        clients.remove(client)
762
 
        if not clients:
763
 
            logger.critical(u"No clients left, exiting")
764
 
            sys.exit()
 
1033
    if use_dbus:
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
765
1036
    
766
1037
    clients.update(Set(Client(name = section,
767
 
                              stop_hook = remove_from_clients,
768
1038
                              config
769
 
                              = dict(client_config.items(section)))
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
770
1041
                       for section in client_config.sections()))
771
1042
    if not clients:
772
 
        logger.critical(u"No clients defined")
773
 
        sys.exit(1)
 
1043
        logger.warning(u"No clients defined")
774
1044
    
775
 
    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
776
1053
        logger.removeHandler(console)
 
1054
        # Close all input and output, do double fork, etc.
777
1055
        daemon()
778
1056
    
779
 
    pidfilename = "/var/run/mandos/mandos.pid"
780
 
    pid = os.getpid()
781
1057
    try:
782
 
        pidfile = open(pidfilename, "w")
 
1058
        pid = os.getpid()
783
1059
        pidfile.write(str(pid) + "\n")
784
1060
        pidfile.close()
785
1061
        del pidfile
786
 
    except IOError, err:
787
 
        logger.error(u"Could not write %s file with PID %d",
788
 
                     pidfilename, os.getpid())
 
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
789
1069
    
790
1070
    def cleanup():
791
1071
        "Cleanup function; run on exit"
798
1078
        
799
1079
        while clients:
800
1080
            client = clients.pop()
801
 
            client.stop_hook = None
802
 
            client.stop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
803
1083
    
804
1084
    atexit.register(cleanup)
805
1085
    
808
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
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
    
811
1140
    for client in clients:
812
 
        client.start()
813
 
    
814
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
815
 
                                 server_settings["port"]),
816
 
                                tcp_handler,
817
 
                                settings=server_settings,
818
 
                                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
    
819
1150
    # Find out what port we got
820
1151
    service.port = tcp_server.socket.getsockname()[1]
821
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
835
1166
        
836
1167
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
1168
                             lambda *args, **kwargs:
838
 
                             tcp_server.handle_request\
839
 
                             (*args[2:], **kwargs) or True)
 
1169
                             (tcp_server.handle_request
 
1170
                              (*args[2:], **kwargs) or True))
840
1171
        
841
1172
        logger.debug(u"Starting main loop")
842
 
        main_loop_started = True
843
1173
        main_loop.run()
844
1174
    except AvahiError, error:
845
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1175
        logger.critical(u"AvahiError: %s", error)
846
1176
        sys.exit(1)
847
1177
    except KeyboardInterrupt:
848
1178
        if debug: