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  • Committer: Teddy Hogeborn
  • Date: 2009-02-12 06:09:24 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090212060924-vwxgitxnwr14w9e4
* mandos (Client.start_checker): Bug fix: Add extra check in case the
                                 checker process completed quickly.

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Lines of Context:
mandos
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# and some lines in "main".
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# 
13
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
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# 
16
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# This program is free software: you can redistribute it and/or modify
17
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# it under the terms of the GNU General Public License as published by
24
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#     GNU General Public License for more details.
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# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
64
 
version = "1.0"
 
69
version = "1.0.5"
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 [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
72
78
logger.addHandler(syslogger)
73
79
 
74
80
console = logging.StreamHandler()
75
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
 
                                       ' %(message)s'))
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
77
83
logger.addHandler(console)
78
84
 
79
85
class AvahiError(Exception):
80
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
81
87
        self.value = value
82
 
    def __str__(self):
83
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
84
91
 
85
92
class AvahiServiceError(AvahiError):
86
93
    pass
106
113
                  a sensible number of times
107
114
    """
108
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
 
                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768):
111
118
        self.interface = interface
112
119
        self.name = name
113
 
        self.type = type
 
120
        self.type = servicetype
114
121
        self.port = port
115
 
        if TXT is None:
116
 
            self.TXT = []
117
 
        else:
118
 
            self.TXT = TXT
 
122
        self.TXT = TXT if TXT is not None else []
119
123
        self.domain = domain
120
124
        self.host = host
121
125
        self.rename_count = 0
 
126
        self.max_renames = max_renames
122
127
    def rename(self):
123
128
        """Derived from the Avahi example code"""
124
129
        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\
 
130
            logger.critical(u"No suitable Zeroconf service name found"
 
131
                            u" after %i retries, exiting.",
 
132
                            self.rename_count)
 
133
            raise AvahiServiceError(u"Too many renames")
 
134
        self.name = server.GetAlternativeServiceName(self.name)
 
135
        logger.info(u"Changing Zeroconf service name to %r ...",
 
136
                    str(self.name))
 
137
        syslogger.setFormatter(logging.Formatter
131
138
                               ('Mandos (%s): %%(levelname)s:'
132
 
                               ' %%(message)s' % name))
 
139
                                ' %%(message)s' % self.name))
133
140
        self.remove()
134
141
        self.add()
135
142
        self.rename_count += 1
141
148
        """Derived from the Avahi example code"""
142
149
        global group
143
150
        if group is None:
144
 
            group = dbus.Interface\
145
 
                    (bus.get_object(avahi.DBUS_NAME,
 
151
            group = dbus.Interface(bus.get_object
 
152
                                   (avahi.DBUS_NAME,
146
153
                                    server.EntryGroupNew()),
147
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
155
            group.connect_to_signal('StateChanged',
149
156
                                    entry_group_state_changed)
150
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
157
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
151
158
                     service.name, service.type)
152
159
        group.AddService(
153
160
                self.interface,         # interface
164
171
# End of Avahi example code
165
172
 
166
173
 
167
 
class Client(object):
 
174
def _datetime_to_dbus(dt, variant_level=0):
 
175
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
176
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
177
 
 
178
 
 
179
class Client(dbus.service.Object):
168
180
    """A representation of a client host served by this server.
169
181
    Attributes:
170
 
    name:      string; from the config file, used in log messages
 
182
    name:       string; from the config file, used in log messages and
 
183
                        D-Bus identifiers
171
184
    fingerprint: string (40 or 32 hexadecimal digits); used to
172
185
                 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.
 
186
    secret:     bytestring; sent verbatim (over TLS) to client
 
187
    host:       string; available for use by the checker command
 
188
    created:    datetime.datetime(); (UTC) object creation
 
189
    last_enabled: datetime.datetime(); (UTC)
 
190
    enabled:    bool()
 
191
    last_checked_ok: datetime.datetime(); (UTC) or None
 
192
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
193
                                      until this client is invalid
 
194
    interval:   datetime.timedelta(); How often to start a new checker
 
195
    disable_hook:  If set, called by disable() as disable_hook(self)
 
196
    checker:    subprocess.Popen(); a running checker process used
 
197
                                    to see if the client lives.
 
198
                                    'None' if no process is running.
184
199
    checker_initiator_tag: a gobject event source tag, or None
185
 
    stop_initiator_tag:    - '' -
 
200
    disable_initiator_tag:    - '' -
186
201
    checker_callback_tag:  - '' -
187
202
    checker_command: string; External command which is run to check if
188
203
                     client lives.  %() expansions are done at
189
204
                     runtime with vars(self) as dict, so that for
190
205
                     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: - '' -
 
206
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
207
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
196
208
    """
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={}):
 
209
    def timeout_milliseconds(self):
 
210
        "Return the 'timeout' attribute in milliseconds"
 
211
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
212
                + (self.timeout.seconds * 1000)
 
213
                + (self.timeout.microseconds // 1000))
 
214
    
 
215
    def interval_milliseconds(self):
 
216
        "Return the 'interval' attribute in milliseconds"
 
217
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
218
                + (self.interval.seconds * 1000)
 
219
                + (self.interval.microseconds // 1000))
 
220
    
 
221
    def __init__(self, name = None, disable_hook=None, config=None,
 
222
                 use_dbus=True):
221
223
        """Note: the 'checker' key in 'config' sets the
222
224
        'checker_command' attribute and *not* the 'checker'
223
225
        attribute."""
224
226
        self.name = name
 
227
        if config is None:
 
228
            config = {}
225
229
        logger.debug(u"Creating client %r", self.name)
 
230
        self.use_dbus = False   # During __init__
226
231
        # Uppercase and remove spaces from fingerprint for later
227
232
        # comparison purposes with return value from the fingerprint()
228
233
        # function
229
 
        self.fingerprint = config["fingerprint"].upper()\
230
 
                           .replace(u" ", u"")
 
234
        self.fingerprint = (config["fingerprint"].upper()
 
235
                            .replace(u" ", u""))
231
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
232
237
        if "secret" in config:
233
238
            self.secret = config["secret"].decode(u"base64")
234
239
        elif "secfile" in config:
235
 
            sf = open(config["secfile"])
236
 
            self.secret = sf.read()
237
 
            sf.close()
 
240
            with closing(open(os.path.expanduser
 
241
                              (os.path.expandvars
 
242
                               (config["secfile"])))) as secfile:
 
243
                self.secret = secfile.read()
238
244
        else:
239
245
            raise TypeError(u"No secret or secfile for client %s"
240
246
                            % self.name)
241
247
        self.host = config.get("host", "")
242
 
        self.created = datetime.datetime.now()
 
248
        self.created = datetime.datetime.utcnow()
 
249
        self.enabled = False
 
250
        self.last_enabled = None
243
251
        self.last_checked_ok = None
244
252
        self.timeout = string_to_delta(config["timeout"])
245
253
        self.interval = string_to_delta(config["interval"])
246
 
        self.stop_hook = stop_hook
 
254
        self.disable_hook = disable_hook
247
255
        self.checker = None
248
256
        self.checker_initiator_tag = None
249
 
        self.stop_initiator_tag = None
 
257
        self.disable_initiator_tag = None
250
258
        self.checker_callback_tag = None
251
 
        self.check_command = config["checker"]
252
 
    def start(self):
 
259
        self.checker_command = config["checker"]
 
260
        self.last_connect = None
 
261
        # Only now, when this client is initialized, can it show up on
 
262
        # the D-Bus
 
263
        self.use_dbus = use_dbus
 
264
        if self.use_dbus:
 
265
            self.dbus_object_path = (dbus.ObjectPath
 
266
                                     ("/clients/"
 
267
                                      + self.name.replace(".", "_")))
 
268
            dbus.service.Object.__init__(self, bus,
 
269
                                         self.dbus_object_path)
 
270
    
 
271
    def enable(self):
253
272
        """Start this client's checker and timeout hooks"""
 
273
        self.last_enabled = datetime.datetime.utcnow()
254
274
        # Schedule a new checker to be started an 'interval' from now,
255
275
        # and every interval from then on.
256
 
        self.checker_initiator_tag = gobject.timeout_add\
257
 
                                     (self._interval_milliseconds,
258
 
                                      self.start_checker)
 
276
        self.checker_initiator_tag = (gobject.timeout_add
 
277
                                      (self.interval_milliseconds(),
 
278
                                       self.start_checker))
259
279
        # Also start a new checker *right now*.
260
280
        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:
 
281
        # Schedule a disable() when 'timeout' has passed
 
282
        self.disable_initiator_tag = (gobject.timeout_add
 
283
                                   (self.timeout_milliseconds(),
 
284
                                    self.disable))
 
285
        self.enabled = True
 
286
        if self.use_dbus:
 
287
            # Emit D-Bus signals
 
288
            self.PropertyChanged(dbus.String(u"enabled"),
 
289
                                 dbus.Boolean(True, variant_level=1))
 
290
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
291
                                 (_datetime_to_dbus(self.last_enabled,
 
292
                                                    variant_level=1)))
 
293
    
 
294
    def disable(self):
 
295
        """Disable this client."""
 
296
        if not getattr(self, "enabled", False):
274
297
            return False
275
 
        if getattr(self, "stop_initiator_tag", False):
276
 
            gobject.source_remove(self.stop_initiator_tag)
277
 
            self.stop_initiator_tag = None
 
298
        logger.info(u"Disabling client %s", self.name)
 
299
        if getattr(self, "disable_initiator_tag", False):
 
300
            gobject.source_remove(self.disable_initiator_tag)
 
301
            self.disable_initiator_tag = None
278
302
        if getattr(self, "checker_initiator_tag", False):
279
303
            gobject.source_remove(self.checker_initiator_tag)
280
304
            self.checker_initiator_tag = None
281
305
        self.stop_checker()
282
 
        if self.stop_hook:
283
 
            self.stop_hook(self)
 
306
        if self.disable_hook:
 
307
            self.disable_hook(self)
 
308
        self.enabled = False
 
309
        if self.use_dbus:
 
310
            # Emit D-Bus signal
 
311
            self.PropertyChanged(dbus.String(u"enabled"),
 
312
                                 dbus.Boolean(False, variant_level=1))
284
313
        # Do not run this again if called by a gobject.timeout_add
285
314
        return False
 
315
    
286
316
    def __del__(self):
287
 
        self.stop_hook = None
288
 
        self.stop()
289
 
    def checker_callback(self, pid, condition):
 
317
        self.disable_hook = None
 
318
        self.disable()
 
319
    
 
320
    def checker_callback(self, pid, condition, command):
290
321
        """The checker has completed, so take appropriate actions."""
291
 
        now = datetime.datetime.now()
292
322
        self.checker_callback_tag = None
293
323
        self.checker = None
294
 
        if os.WIFEXITED(condition) \
295
 
               and (os.WEXITSTATUS(condition) == 0):
296
 
            logger.info(u"Checker for %(name)s succeeded",
297
 
                        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)
303
 
        elif not os.WIFEXITED(condition):
 
324
        if self.use_dbus:
 
325
            # Emit D-Bus signal
 
326
            self.PropertyChanged(dbus.String(u"checker_running"),
 
327
                                 dbus.Boolean(False, variant_level=1))
 
328
        if os.WIFEXITED(condition):
 
329
            exitstatus = os.WEXITSTATUS(condition)
 
330
            if exitstatus == 0:
 
331
                logger.info(u"Checker for %(name)s succeeded",
 
332
                            vars(self))
 
333
                self.checked_ok()
 
334
            else:
 
335
                logger.info(u"Checker for %(name)s failed",
 
336
                            vars(self))
 
337
            if self.use_dbus:
 
338
                # Emit D-Bus signal
 
339
                self.CheckerCompleted(dbus.Int16(exitstatus),
 
340
                                      dbus.Int64(condition),
 
341
                                      dbus.String(command))
 
342
        else:
304
343
            logger.warning(u"Checker for %(name)s crashed?",
305
344
                           vars(self))
306
 
        else:
307
 
            logger.info(u"Checker for %(name)s failed",
308
 
                        vars(self))
 
345
            if self.use_dbus:
 
346
                # Emit D-Bus signal
 
347
                self.CheckerCompleted(dbus.Int16(-1),
 
348
                                      dbus.Int64(condition),
 
349
                                      dbus.String(command))
 
350
    
 
351
    def checked_ok(self):
 
352
        """Bump up the timeout for this client.
 
353
        This should only be called when the client has been seen,
 
354
        alive and well.
 
355
        """
 
356
        self.last_checked_ok = datetime.datetime.utcnow()
 
357
        gobject.source_remove(self.disable_initiator_tag)
 
358
        self.disable_initiator_tag = (gobject.timeout_add
 
359
                                      (self.timeout_milliseconds(),
 
360
                                       self.disable))
 
361
        if self.use_dbus:
 
362
            # Emit D-Bus signal
 
363
            self.PropertyChanged(
 
364
                dbus.String(u"last_checked_ok"),
 
365
                (_datetime_to_dbus(self.last_checked_ok,
 
366
                                   variant_level=1)))
 
367
    
309
368
    def start_checker(self):
310
369
        """Start a new checker subprocess if one is not running.
311
370
        If a checker already exists, leave it running and do
320
379
        # is as it should be.
321
380
        if self.checker is None:
322
381
            try:
323
 
                # In case check_command has exactly one % operator
324
 
                command = self.check_command % self.host
 
382
                # In case checker_command has exactly one % operator
 
383
                command = self.checker_command % self.host
325
384
            except TypeError:
326
385
                # Escape attributes for the shell
327
386
                escaped_attrs = dict((key, re.escape(str(val)))
328
387
                                     for key, val in
329
388
                                     vars(self).iteritems())
330
389
                try:
331
 
                    command = self.check_command % escaped_attrs
 
390
                    command = self.checker_command % escaped_attrs
332
391
                except TypeError, error:
333
392
                    logger.error(u'Could not format string "%s":'
334
 
                                 u' %s', self.check_command, error)
 
393
                                 u' %s', self.checker_command, error)
335
394
                    return True # Try again later
336
395
            try:
337
396
                logger.info(u"Starting checker %r for %s",
338
397
                            command, self.name)
 
398
                # We don't need to redirect stdout and stderr, since
 
399
                # in normal mode, that is already done by daemon(),
 
400
                # and in debug mode we don't want to.  (Stdin is
 
401
                # always replaced by /dev/null.)
339
402
                self.checker = subprocess.Popen(command,
340
403
                                                close_fds=True,
341
404
                                                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:
 
405
                if self.use_dbus:
 
406
                    # Emit D-Bus signal
 
407
                    self.CheckerStarted(command)
 
408
                    self.PropertyChanged(
 
409
                        dbus.String("checker_running"),
 
410
                        dbus.Boolean(True, variant_level=1))
 
411
                self.checker_callback_tag = (gobject.child_watch_add
 
412
                                             (self.checker.pid,
 
413
                                              self.checker_callback,
 
414
                                              data=command))
 
415
                # The checker may have completed before the gobject
 
416
                # watch was added.  Check for this.
 
417
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
418
                if pid:
 
419
                    gobject.source_remove(self.checker_callback_tag)
 
420
                    self.checker_callback(pid, status, command)
 
421
            except OSError, error:
346
422
                logger.error(u"Failed to start subprocess: %s",
347
423
                             error)
348
424
        # Re-run this periodically if run by gobject.timeout_add
349
425
        return True
 
426
    
350
427
    def stop_checker(self):
351
428
        """Force the checker process, if any, to stop."""
352
429
        if self.checker_callback_tag:
364
441
            if error.errno != errno.ESRCH: # No such process
365
442
                raise
366
443
        self.checker = None
 
444
        if self.use_dbus:
 
445
            self.PropertyChanged(dbus.String(u"checker_running"),
 
446
                                 dbus.Boolean(False, variant_level=1))
 
447
    
367
448
    def still_valid(self):
368
449
        """Has the timeout not yet passed for this client?"""
369
 
        now = datetime.datetime.now()
 
450
        if not getattr(self, "enabled", False):
 
451
            return False
 
452
        now = datetime.datetime.utcnow()
370
453
        if self.last_checked_ok is None:
371
454
            return now < (self.created + self.timeout)
372
455
        else:
373
456
            return now < (self.last_checked_ok + self.timeout)
 
457
    
 
458
    ## D-Bus methods & signals
 
459
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
460
    
 
461
    # CheckedOK - method
 
462
    CheckedOK = dbus.service.method(_interface)(checked_ok)
 
463
    CheckedOK.__name__ = "CheckedOK"
 
464
    
 
465
    # CheckerCompleted - signal
 
466
    @dbus.service.signal(_interface, signature="nxs")
 
467
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
468
        "D-Bus signal"
 
469
        pass
 
470
    
 
471
    # CheckerStarted - signal
 
472
    @dbus.service.signal(_interface, signature="s")
 
473
    def CheckerStarted(self, command):
 
474
        "D-Bus signal"
 
475
        pass
 
476
    
 
477
    # GetAllProperties - method
 
478
    @dbus.service.method(_interface, out_signature="a{sv}")
 
479
    def GetAllProperties(self):
 
480
        "D-Bus method"
 
481
        return dbus.Dictionary({
 
482
                dbus.String("name"):
 
483
                    dbus.String(self.name, variant_level=1),
 
484
                dbus.String("fingerprint"):
 
485
                    dbus.String(self.fingerprint, variant_level=1),
 
486
                dbus.String("host"):
 
487
                    dbus.String(self.host, variant_level=1),
 
488
                dbus.String("created"):
 
489
                    _datetime_to_dbus(self.created, variant_level=1),
 
490
                dbus.String("last_enabled"):
 
491
                    (_datetime_to_dbus(self.last_enabled,
 
492
                                       variant_level=1)
 
493
                     if self.last_enabled is not None
 
494
                     else dbus.Boolean(False, variant_level=1)),
 
495
                dbus.String("enabled"):
 
496
                    dbus.Boolean(self.enabled, variant_level=1),
 
497
                dbus.String("last_checked_ok"):
 
498
                    (_datetime_to_dbus(self.last_checked_ok,
 
499
                                       variant_level=1)
 
500
                     if self.last_checked_ok is not None
 
501
                     else dbus.Boolean (False, variant_level=1)),
 
502
                dbus.String("timeout"):
 
503
                    dbus.UInt64(self.timeout_milliseconds(),
 
504
                                variant_level=1),
 
505
                dbus.String("interval"):
 
506
                    dbus.UInt64(self.interval_milliseconds(),
 
507
                                variant_level=1),
 
508
                dbus.String("checker"):
 
509
                    dbus.String(self.checker_command,
 
510
                                variant_level=1),
 
511
                dbus.String("checker_running"):
 
512
                    dbus.Boolean(self.checker is not None,
 
513
                                 variant_level=1),
 
514
                dbus.String("object_path"):
 
515
                    dbus.ObjectPath(self.dbus_object_path,
 
516
                                    variant_level=1)
 
517
                }, signature="sv")
 
518
    
 
519
    # IsStillValid - method
 
520
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
521
                    (still_valid))
 
522
    IsStillValid.__name__ = "IsStillValid"
 
523
    
 
524
    # PropertyChanged - signal
 
525
    @dbus.service.signal(_interface, signature="sv")
 
526
    def PropertyChanged(self, property, value):
 
527
        "D-Bus signal"
 
528
        pass
 
529
    
 
530
    # SetChecker - method
 
531
    @dbus.service.method(_interface, in_signature="s")
 
532
    def SetChecker(self, checker):
 
533
        "D-Bus setter method"
 
534
        self.checker_command = checker
 
535
        # Emit D-Bus signal
 
536
        self.PropertyChanged(dbus.String(u"checker"),
 
537
                             dbus.String(self.checker_command,
 
538
                                         variant_level=1))
 
539
    
 
540
    # SetHost - method
 
541
    @dbus.service.method(_interface, in_signature="s")
 
542
    def SetHost(self, host):
 
543
        "D-Bus setter method"
 
544
        self.host = host
 
545
        # Emit D-Bus signal
 
546
        self.PropertyChanged(dbus.String(u"host"),
 
547
                             dbus.String(self.host, variant_level=1))
 
548
    
 
549
    # SetInterval - method
 
550
    @dbus.service.method(_interface, in_signature="t")
 
551
    def SetInterval(self, milliseconds):
 
552
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
553
        # Emit D-Bus signal
 
554
        self.PropertyChanged(dbus.String(u"interval"),
 
555
                             (dbus.UInt64(self.interval_milliseconds(),
 
556
                                          variant_level=1)))
 
557
    
 
558
    # SetSecret - method
 
559
    @dbus.service.method(_interface, in_signature="ay",
 
560
                         byte_arrays=True)
 
561
    def SetSecret(self, secret):
 
562
        "D-Bus setter method"
 
563
        self.secret = str(secret)
 
564
    
 
565
    # SetTimeout - method
 
566
    @dbus.service.method(_interface, in_signature="t")
 
567
    def SetTimeout(self, milliseconds):
 
568
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
569
        # Emit D-Bus signal
 
570
        self.PropertyChanged(dbus.String(u"timeout"),
 
571
                             (dbus.UInt64(self.timeout_milliseconds(),
 
572
                                          variant_level=1)))
 
573
    
 
574
    # Enable - method
 
575
    Enable = dbus.service.method(_interface)(enable)
 
576
    Enable.__name__ = "Enable"
 
577
    
 
578
    # StartChecker - method
 
579
    @dbus.service.method(_interface)
 
580
    def StartChecker(self):
 
581
        "D-Bus method"
 
582
        self.start_checker()
 
583
    
 
584
    # Disable - method
 
585
    @dbus.service.method(_interface)
 
586
    def Disable(self):
 
587
        "D-Bus method"
 
588
        self.disable()
 
589
    
 
590
    # StopChecker - method
 
591
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
592
    StopChecker.__name__ = "StopChecker"
 
593
    
 
594
    del _interface
374
595
 
375
596
 
376
597
def peer_certificate(session):
377
598
    "Return the peer's OpenPGP certificate as a bytestring"
378
599
    # 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:
 
600
    if (gnutls.library.functions
 
601
        .gnutls_certificate_type_get(session._c_object)
 
602
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
382
603
        # ...do the normal thing
383
604
        return session.peer_certificate
384
 
    list_size = ctypes.c_uint()
385
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
 
        (session._c_object, ctypes.byref(list_size))
 
605
    list_size = ctypes.c_uint(1)
 
606
    cert_list = (gnutls.library.functions
 
607
                 .gnutls_certificate_get_peers
 
608
                 (session._c_object, ctypes.byref(list_size)))
 
609
    if not bool(cert_list) and list_size.value != 0:
 
610
        raise gnutls.errors.GNUTLSError("error getting peer"
 
611
                                        " certificate")
387
612
    if list_size.value == 0:
388
613
        return None
389
614
    cert = cert_list[0]
393
618
def fingerprint(openpgp):
394
619
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
620
    # 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)))
 
621
    datum = (gnutls.library.types
 
622
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
623
                                         ctypes.POINTER
 
624
                                         (ctypes.c_ubyte)),
 
625
                             ctypes.c_uint(len(openpgp))))
400
626
    # New empty GnuTLS certificate
401
627
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
403
 
        (ctypes.byref(crt))
 
628
    (gnutls.library.functions
 
629
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
404
630
    # 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)
 
631
    (gnutls.library.functions
 
632
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
633
                                gnutls.library.constants
 
634
                                .GNUTLS_OPENPGP_FMT_RAW))
 
635
    # Verify the self signature in the key
 
636
    crtverify = ctypes.c_uint()
 
637
    (gnutls.library.functions
 
638
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
639
    if crtverify.value != 0:
 
640
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
641
        raise gnutls.errors.CertificateSecurityError("Verify failed")
408
642
    # New buffer for the fingerprint
409
 
    buffer = ctypes.create_string_buffer(20)
410
 
    buffer_length = ctypes.c_size_t()
 
643
    buf = ctypes.create_string_buffer(20)
 
644
    buf_len = ctypes.c_size_t()
411
645
    # 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))
 
646
    (gnutls.library.functions
 
647
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
648
                                         ctypes.byref(buf_len)))
414
649
    # Deinit the certificate
415
650
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
651
    # Convert the buffer to a Python bytestring
417
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
652
    fpr = ctypes.string_at(buf, buf_len.value)
418
653
    # Convert the bytestring to hexadecimal notation
419
654
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
655
    return hex_fpr
421
656
 
422
657
 
423
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
424
659
    """A TCP request handler class.
425
660
    Instantiated by IPv6_TCPServer for each request to handle it.
426
661
    Note: This will run in its own forked process."""
427
662
    
428
663
    def handle(self):
429
664
        logger.info(u"TCP connection from: %s",
430
 
                     unicode(self.client_address))
431
 
        session = gnutls.connection.ClientSession\
432
 
                  (self.request, gnutls.connection.X509Credentials())
 
665
                    unicode(self.client_address))
 
666
        session = (gnutls.connection
 
667
                   .ClientSession(self.request,
 
668
                                  gnutls.connection
 
669
                                  .X509Credentials()))
433
670
        
434
671
        line = self.request.makefile().readline()
435
672
        logger.debug(u"Protocol version: %r", line)
446
683
        # using OpenPGP certificates.
447
684
        
448
685
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
 
        #                "+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);
 
686
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
687
        #                     "+DHE-DSS"))
 
688
        # Use a fallback default, since this MUST be set.
 
689
        priority = self.server.settings.get("priority", "NORMAL")
 
690
        (gnutls.library.functions
 
691
         .gnutls_priority_set_direct(session._c_object,
 
692
                                     priority, None))
457
693
        
458
694
        try:
459
695
            session.handshake()
462
698
            # Do not run session.bye() here: the session is not
463
699
            # established.  Just abandon the request.
464
700
            return
 
701
        logger.debug(u"Handshake succeeded")
465
702
        try:
466
703
            fpr = fingerprint(peer_certificate(session))
467
704
        except (TypeError, gnutls.errors.GNUTLSError), error:
469
706
            session.bye()
470
707
            return
471
708
        logger.debug(u"Fingerprint: %s", fpr)
472
 
        client = None
 
709
        
473
710
        for c in self.server.clients:
474
711
            if c.fingerprint == fpr:
475
712
                client = c
476
713
                break
477
 
        if not client:
 
714
        else:
478
715
            logger.warning(u"Client not found for fingerprint: %s",
479
716
                           fpr)
480
717
            session.bye()
487
724
                           vars(client))
488
725
            session.bye()
489
726
            return
 
727
        ## This won't work here, since we're in a fork.
 
728
        # client.checked_ok()
490
729
        sent_size = 0
491
730
        while sent_size < len(client.secret):
492
731
            sent = session.send(client.secret[sent_size:])
497
736
        session.bye()
498
737
 
499
738
 
500
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
740
                     SocketServer.TCPServer, object):
501
741
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
502
742
    Attributes:
503
743
        settings:       Server settings
504
744
        clients:        Set() of Client objects
 
745
        enabled:        Boolean; whether this server is activated yet
505
746
    """
506
747
    address_family = socket.AF_INET6
507
748
    def __init__(self, *args, **kwargs):
511
752
        if "clients" in kwargs:
512
753
            self.clients = kwargs["clients"]
513
754
            del kwargs["clients"]
514
 
        return super(type(self), self).__init__(*args, **kwargs)
 
755
        self.enabled = False
 
756
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
515
757
    def server_bind(self):
516
758
        """This overrides the normal server_bind() function
517
759
        to bind to an interface if one was specified, and also NOT to
529
771
                                 u" bind to interface %s",
530
772
                                 self.settings["interface"])
531
773
                else:
532
 
                    raise error
 
774
                    raise
533
775
        # Only bind(2) the socket if we really need to.
534
776
        if self.server_address[0] or self.server_address[1]:
535
777
            if not self.server_address[0]:
546
788
#                                            if_nametoindex
547
789
#                                            (self.settings
548
790
#                                             ["interface"]))
549
 
            return super(type(self), self).server_bind()
 
791
            return super(IPv6_TCPServer, self).server_bind()
 
792
    def server_activate(self):
 
793
        if self.enabled:
 
794
            return super(IPv6_TCPServer, self).server_activate()
 
795
    def enable(self):
 
796
        self.enabled = True
550
797
 
551
798
 
552
799
def string_to_delta(interval):
553
800
    """Parse a string and return a datetime.timedelta
554
 
 
 
801
    
555
802
    >>> string_to_delta('7d')
556
803
    datetime.timedelta(7)
557
804
    >>> string_to_delta('60s')
562
809
    datetime.timedelta(1)
563
810
    >>> string_to_delta(u'1w')
564
811
    datetime.timedelta(7)
 
812
    >>> string_to_delta('5m 30s')
 
813
    datetime.timedelta(0, 330)
565
814
    """
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:
 
815
    timevalue = datetime.timedelta(0)
 
816
    for s in interval.split():
 
817
        try:
 
818
            suffix = unicode(s[-1])
 
819
            value = int(s[:-1])
 
820
            if suffix == u"d":
 
821
                delta = datetime.timedelta(value)
 
822
            elif suffix == u"s":
 
823
                delta = datetime.timedelta(0, value)
 
824
            elif suffix == u"m":
 
825
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
826
            elif suffix == u"h":
 
827
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
828
            elif suffix == u"w":
 
829
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
830
            else:
 
831
                raise ValueError
 
832
        except (ValueError, IndexError):
580
833
            raise ValueError
581
 
    except (ValueError, IndexError):
582
 
        raise ValueError
583
 
    return delta
 
834
        timevalue += delta
 
835
    return timevalue
584
836
 
585
837
 
586
838
def server_state_changed(state):
587
839
    """Derived from the Avahi example code"""
588
840
    if state == avahi.SERVER_COLLISION:
589
 
        logger.error(u"Server name collision")
 
841
        logger.error(u"Zeroconf server name collision")
590
842
        service.remove()
591
843
    elif state == avahi.SERVER_RUNNING:
592
844
        service.add()
594
846
 
595
847
def entry_group_state_changed(state, error):
596
848
    """Derived from the Avahi example code"""
597
 
    logger.debug(u"state change: %i", state)
 
849
    logger.debug(u"Avahi state change: %i", state)
598
850
    
599
851
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
 
        logger.debug(u"Service established.")
 
852
        logger.debug(u"Zeroconf service established.")
601
853
    elif state == avahi.ENTRY_GROUP_COLLISION:
602
 
        logger.warning(u"Service name collision.")
 
854
        logger.warning(u"Zeroconf service name collision.")
603
855
        service.rename()
604
856
    elif state == avahi.ENTRY_GROUP_FAILURE:
605
 
        logger.critical(u"Error in group state changed %s",
 
857
        logger.critical(u"Avahi: Error in group state changed %s",
606
858
                        unicode(error))
607
 
        raise AvahiGroupError("State changed: %s", str(error))
 
859
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
608
860
 
609
861
def if_nametoindex(interface):
610
862
    """Call the C function if_nametoindex(), or equivalent"""
611
863
    global if_nametoindex
612
864
    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
 
865
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
866
                          (ctypes.util.find_library("c"))
 
867
                          .if_nametoindex)
617
868
    except (OSError, AttributeError):
618
869
        if "struct" not in sys.modules:
619
870
            import struct
622
873
        def if_nametoindex(interface):
623
874
            "Get an interface index the hard way, i.e. using fcntl()"
624
875
            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()
 
876
            with closing(socket.socket()) as s:
 
877
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
878
                                    struct.pack("16s16x", interface))
629
879
            interface_index = struct.unpack("I", ifreq[16:20])[0]
630
880
            return interface_index
631
881
    return if_nametoindex(interface)
655
905
 
656
906
 
657
907
def main():
658
 
    global main_loop_started
659
 
    main_loop_started = False
660
 
    
661
 
    parser = OptionParser(version = "%%prog %s" % version)
 
908
    parser = optparse.OptionParser(version = "%%prog %s" % version)
662
909
    parser.add_option("-i", "--interface", type="string",
663
910
                      metavar="IF", help="Bind to interface IF")
664
911
    parser.add_option("-a", "--address", type="string",
665
912
                      help="Address to listen for requests on")
666
913
    parser.add_option("-p", "--port", type="int",
667
914
                      help="Port number to receive requests on")
668
 
    parser.add_option("--check", action="store_true", default=False,
 
915
    parser.add_option("--check", action="store_true",
669
916
                      help="Run self-test")
670
917
    parser.add_option("--debug", action="store_true",
671
918
                      help="Debug mode; run in foreground and log to"
678
925
                      default="/etc/mandos", metavar="DIR",
679
926
                      help="Directory to search for configuration"
680
927
                      " files")
681
 
    (options, args) = parser.parse_args()
 
928
    parser.add_option("--no-dbus", action="store_false",
 
929
                      dest="use_dbus",
 
930
                      help="Do not provide D-Bus system bus"
 
931
                      " interface")
 
932
    options = parser.parse_args()[0]
682
933
    
683
934
    if options.check:
684
935
        import doctest
693
944
                        "priority":
694
945
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
946
                        "servicename": "Mandos",
 
947
                        "use_dbus": "True",
696
948
                        }
697
949
    
698
950
    # Parse config file for server-global settings
699
951
    server_config = ConfigParser.SafeConfigParser(server_defaults)
700
952
    del server_defaults
701
953
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
 
    server_section = "server"
703
954
    # 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")
 
955
    server_settings = server_config.defaults()
 
956
    # Use the appropriate methods on the non-string config options
 
957
    server_settings["debug"] = server_config.getboolean("DEFAULT",
 
958
                                                        "debug")
 
959
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
 
960
                                                           "use_dbus")
 
961
    if server_settings["port"]:
 
962
        server_settings["port"] = server_config.getint("DEFAULT",
 
963
                                                       "port")
708
964
    del server_config
709
965
    
710
966
    # Override the settings from the config file with command line
711
967
    # options, if set.
712
968
    for option in ("interface", "address", "port", "debug",
713
 
                   "priority", "servicename", "configdir"):
 
969
                   "priority", "servicename", "configdir",
 
970
                   "use_dbus"):
714
971
        value = getattr(options, option)
715
972
        if value is not None:
716
973
            server_settings[option] = value
717
974
    del options
718
975
    # Now we have our good server settings in "server_settings"
719
976
    
 
977
    # For convenience
720
978
    debug = server_settings["debug"]
 
979
    use_dbus = server_settings["use_dbus"]
721
980
    
722
981
    if not debug:
723
982
        syslogger.setLevel(logging.WARNING)
724
983
        console.setLevel(logging.WARNING)
725
984
    
726
985
    if server_settings["servicename"] != "Mandos":
727
 
        syslogger.setFormatter(logging.Formatter\
 
986
        syslogger.setFormatter(logging.Formatter
728
987
                               ('Mandos (%s): %%(levelname)s:'
729
988
                                ' %%(message)s'
730
989
                                % server_settings["servicename"]))
733
992
    client_defaults = { "timeout": "1h",
734
993
                        "interval": "5m",
735
994
                        "checker": "fping -q -- %%(host)s",
 
995
                        "host": "",
736
996
                        }
737
997
    client_config = ConfigParser.SafeConfigParser(client_defaults)
738
998
    client_config.read(os.path.join(server_settings["configdir"],
739
999
                                    "clients.conf"))
740
1000
    
 
1001
    clients = Set()
 
1002
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
1003
                                 server_settings["port"]),
 
1004
                                TCP_handler,
 
1005
                                settings=server_settings,
 
1006
                                clients=clients)
 
1007
    pidfilename = "/var/run/mandos.pid"
 
1008
    try:
 
1009
        pidfile = open(pidfilename, "w")
 
1010
    except IOError:
 
1011
        logger.error("Could not open file %r", pidfilename)
 
1012
    
 
1013
    try:
 
1014
        uid = pwd.getpwnam("_mandos").pw_uid
 
1015
        gid = pwd.getpwnam("_mandos").pw_gid
 
1016
    except KeyError:
 
1017
        try:
 
1018
            uid = pwd.getpwnam("mandos").pw_uid
 
1019
            gid = pwd.getpwnam("mandos").pw_gid
 
1020
        except KeyError:
 
1021
            try:
 
1022
                uid = pwd.getpwnam("nobody").pw_uid
 
1023
                gid = pwd.getpwnam("nogroup").pw_gid
 
1024
            except KeyError:
 
1025
                uid = 65534
 
1026
                gid = 65534
 
1027
    try:
 
1028
        os.setgid(gid)
 
1029
        os.setuid(uid)
 
1030
    except OSError, error:
 
1031
        if error[0] != errno.EPERM:
 
1032
            raise error
 
1033
    
 
1034
    # Enable all possible GnuTLS debugging
 
1035
    if debug:
 
1036
        # "Use a log level over 10 to enable all debugging options."
 
1037
        # - GnuTLS manual
 
1038
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1039
        
 
1040
        @gnutls.library.types.gnutls_log_func
 
1041
        def debug_gnutls(level, string):
 
1042
            logger.debug("GnuTLS: %s", string[:-1])
 
1043
        
 
1044
        (gnutls.library.functions
 
1045
         .gnutls_global_set_log_function(debug_gnutls))
 
1046
    
741
1047
    global service
742
1048
    service = AvahiService(name = server_settings["servicename"],
743
 
                           type = "_mandos._tcp", );
 
1049
                           servicetype = "_mandos._tcp", )
744
1050
    if server_settings["interface"]:
745
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1051
        service.interface = (if_nametoindex
 
1052
                             (server_settings["interface"]))
746
1053
    
747
1054
    global main_loop
748
1055
    global bus
751
1058
    DBusGMainLoop(set_as_default=True )
752
1059
    main_loop = gobject.MainLoop()
753
1060
    bus = dbus.SystemBus()
754
 
    server = dbus.Interface(
755
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
 
            avahi.DBUS_INTERFACE_SERVER )
 
1061
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1062
                                           avahi.DBUS_PATH_SERVER),
 
1063
                            avahi.DBUS_INTERFACE_SERVER)
757
1064
    # 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()
 
1065
    if use_dbus:
 
1066
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
765
1067
    
766
1068
    clients.update(Set(Client(name = section,
767
 
                              stop_hook = remove_from_clients,
768
1069
                              config
769
 
                              = dict(client_config.items(section)))
 
1070
                              = dict(client_config.items(section)),
 
1071
                              use_dbus = use_dbus)
770
1072
                       for section in client_config.sections()))
771
1073
    if not clients:
772
 
        logger.critical(u"No clients defined")
773
 
        sys.exit(1)
 
1074
        logger.warning(u"No clients defined")
774
1075
    
775
 
    if not debug:
 
1076
    if debug:
 
1077
        # Redirect stdin so all checkers get /dev/null
 
1078
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1079
        os.dup2(null, sys.stdin.fileno())
 
1080
        if null > 2:
 
1081
            os.close(null)
 
1082
    else:
 
1083
        # No console logging
776
1084
        logger.removeHandler(console)
 
1085
        # Close all input and output, do double fork, etc.
777
1086
        daemon()
778
1087
    
779
 
    pidfilename = "/var/run/mandos/mandos.pid"
780
 
    pid = os.getpid()
781
1088
    try:
782
 
        pidfile = open(pidfilename, "w")
 
1089
        pid = os.getpid()
783
1090
        pidfile.write(str(pid) + "\n")
784
1091
        pidfile.close()
785
1092
        del pidfile
786
 
    except IOError, err:
787
 
        logger.error(u"Could not write %s file with PID %d",
788
 
                     pidfilename, os.getpid())
 
1093
    except IOError:
 
1094
        logger.error(u"Could not write to file %r with PID %d",
 
1095
                     pidfilename, pid)
 
1096
    except NameError:
 
1097
        # "pidfile" was never created
 
1098
        pass
 
1099
    del pidfilename
789
1100
    
790
1101
    def cleanup():
791
1102
        "Cleanup function; run on exit"
798
1109
        
799
1110
        while clients:
800
1111
            client = clients.pop()
801
 
            client.stop_hook = None
802
 
            client.stop()
 
1112
            client.disable_hook = None
 
1113
            client.disable()
803
1114
    
804
1115
    atexit.register(cleanup)
805
1116
    
808
1119
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
1120
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
1121
    
 
1122
    if use_dbus:
 
1123
        class MandosServer(dbus.service.Object):
 
1124
            """A D-Bus proxy object"""
 
1125
            def __init__(self):
 
1126
                dbus.service.Object.__init__(self, bus, "/")
 
1127
            _interface = u"se.bsnet.fukt.Mandos"
 
1128
            
 
1129
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1130
            def ClientAdded(self, objpath, properties):
 
1131
                "D-Bus signal"
 
1132
                pass
 
1133
            
 
1134
            @dbus.service.signal(_interface, signature="os")
 
1135
            def ClientRemoved(self, objpath, name):
 
1136
                "D-Bus signal"
 
1137
                pass
 
1138
            
 
1139
            @dbus.service.method(_interface, out_signature="ao")
 
1140
            def GetAllClients(self):
 
1141
                "D-Bus method"
 
1142
                return dbus.Array(c.dbus_object_path for c in clients)
 
1143
            
 
1144
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
 
1145
            def GetAllClientsWithProperties(self):
 
1146
                "D-Bus method"
 
1147
                return dbus.Dictionary(
 
1148
                    ((c.dbus_object_path, c.GetAllProperties())
 
1149
                     for c in clients),
 
1150
                    signature="oa{sv}")
 
1151
            
 
1152
            @dbus.service.method(_interface, in_signature="o")
 
1153
            def RemoveClient(self, object_path):
 
1154
                "D-Bus method"
 
1155
                for c in clients:
 
1156
                    if c.dbus_object_path == object_path:
 
1157
                        clients.remove(c)
 
1158
                        # Don't signal anything except ClientRemoved
 
1159
                        c.use_dbus = False
 
1160
                        c.disable()
 
1161
                        # Emit D-Bus signal
 
1162
                        self.ClientRemoved(object_path, c.name)
 
1163
                        return
 
1164
                raise KeyError
 
1165
            
 
1166
            del _interface
 
1167
        
 
1168
        mandos_server = MandosServer()
 
1169
    
811
1170
    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)
 
1171
        if use_dbus:
 
1172
            # Emit D-Bus signal
 
1173
            mandos_server.ClientAdded(client.dbus_object_path,
 
1174
                                      client.GetAllProperties())
 
1175
        client.enable()
 
1176
    
 
1177
    tcp_server.enable()
 
1178
    tcp_server.server_activate()
 
1179
    
819
1180
    # Find out what port we got
820
1181
    service.port = tcp_server.socket.getsockname()[1]
821
1182
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
835
1196
        
836
1197
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
1198
                             lambda *args, **kwargs:
838
 
                             tcp_server.handle_request\
839
 
                             (*args[2:], **kwargs) or True)
 
1199
                             (tcp_server.handle_request
 
1200
                              (*args[2:], **kwargs) or True))
840
1201
        
841
1202
        logger.debug(u"Starting main loop")
842
 
        main_loop_started = True
843
1203
        main_loop.run()
844
1204
    except AvahiError, error:
845
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1205
        logger.critical(u"AvahiError: %s", error)
846
1206
        sys.exit(1)
847
1207
    except KeyboardInterrupt:
848
1208
        if debug:
849
 
            print
 
1209
            print >> sys.stderr
 
1210
        logger.debug("Server received KeyboardInterrupt")
 
1211
    logger.debug("Server exiting")
850
1212
 
851
1213
if __name__ == '__main__':
852
1214
    main()