/mandos/release

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-03 05:08:24 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080903050824-x38ghzu01vkfrpb4
* plugins.d/password-request.xml (OVERVIEW): Improved wording.
  (EXIT STATUS): Fixed typos.

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Lines of Context:
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# and some lines in "main".
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# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
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# This program is free software: you can redistribute it and/or modify
18
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# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import division, with_statement, absolute_import
 
33
from __future__ import division
35
34
 
36
35
import SocketServer
37
36
import socket
38
 
import optparse
 
37
import select
 
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
58
 
61
59
import dbus
62
 
import dbus.service
63
60
import gobject
64
61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
 
import ctypes.util
68
64
 
69
 
version = "1.0.8"
 
65
version = "1.0"
70
66
 
71
67
logger = logging.Logger('mandos')
72
 
syslogger = (logging.handlers.SysLogHandler
73
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
 
              address = "/dev/log"))
75
 
syslogger.setFormatter(logging.Formatter
76
 
                       ('Mandos [%(process)d]: %(levelname)s:'
77
 
                        ' %(message)s'))
 
68
syslogger = logging.handlers.SysLogHandler\
 
69
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
70
             address = "/dev/log")
 
71
syslogger.setFormatter(logging.Formatter\
 
72
                        ('Mandos: %(levelname)s: %(message)s'))
78
73
logger.addHandler(syslogger)
79
74
 
80
75
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
 
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
77
                                       ' %(message)s'))
83
78
logger.addHandler(console)
84
79
 
85
80
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
81
    def __init__(self, value):
87
82
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
83
    def __str__(self):
 
84
        return repr(self.value)
91
85
 
92
86
class AvahiServiceError(AvahiError):
93
87
    pass
113
107
                  a sensible number of times
114
108
    """
115
109
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
 
                 servicetype = None, port = None, TXT = None,
117
 
                 domain = "", host = "", max_renames = 32768,
118
 
                 protocol = avahi.PROTO_UNSPEC):
 
110
                 type = None, port = None, TXT = None, domain = "",
 
111
                 host = "", max_renames = 32768):
119
112
        self.interface = interface
120
113
        self.name = name
121
 
        self.type = servicetype
 
114
        self.type = type
122
115
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
116
        if TXT is None:
 
117
            self.TXT = []
 
118
        else:
 
119
            self.TXT = TXT
124
120
        self.domain = domain
125
121
        self.host = host
126
122
        self.rename_count = 0
127
123
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
124
    def rename(self):
130
125
        """Derived from the Avahi example code"""
131
126
        if self.rename_count >= self.max_renames:
132
127
            logger.critical(u"No suitable Zeroconf service name found"
133
128
                            u" after %i retries, exiting.",
134
 
                            self.rename_count)
135
 
            raise AvahiServiceError(u"Too many renames")
 
129
                            rename_count)
 
130
            raise AvahiServiceError("Too many renames")
136
131
        self.name = server.GetAlternativeServiceName(self.name)
137
132
        logger.info(u"Changing Zeroconf service name to %r ...",
138
133
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
 
134
        syslogger.setFormatter(logging.Formatter\
140
135
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
136
                               ' %%(message)s' % self.name))
142
137
        self.remove()
143
138
        self.add()
144
139
        self.rename_count += 1
150
145
        """Derived from the Avahi example code"""
151
146
        global group
152
147
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
155
150
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
152
            group.connect_to_signal('StateChanged',
158
153
                                    entry_group_state_changed)
159
154
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
155
                     service.name, service.type)
161
156
        group.AddService(
162
157
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
158
                avahi.PROTO_INET6,      # protocol
164
159
                dbus.UInt32(0),         # flags
165
160
                self.name, self.type,
166
161
                self.domain, self.host,
173
168
# End of Avahi example code
174
169
 
175
170
 
176
 
def _datetime_to_dbus(dt, variant_level=0):
177
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
178
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
179
 
 
180
 
 
181
 
class Client(dbus.service.Object):
 
171
class Client(object):
182
172
    """A representation of a client host served by this server.
183
173
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
174
    name:      string; from the config file, used in log messages
186
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
176
                 uniquely identify the client
188
 
    secret:     bytestring; sent verbatim (over TLS) to client
189
 
    host:       string; available for use by the checker command
190
 
    created:    datetime.datetime(); (UTC) object creation
191
 
    last_enabled: datetime.datetime(); (UTC)
192
 
    enabled:    bool()
193
 
    last_checked_ok: datetime.datetime(); (UTC) or None
194
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
195
 
                                      until this client is invalid
196
 
    interval:   datetime.timedelta(); How often to start a new checker
197
 
    disable_hook:  If set, called by disable() as disable_hook(self)
198
 
    checker:    subprocess.Popen(); a running checker process used
199
 
                                    to see if the client lives.
200
 
                                    'None' if no process is running.
 
177
    secret:    bytestring; sent verbatim (over TLS) to client
 
178
    host:      string; available for use by the checker command
 
179
    created:   datetime.datetime(); object creation, not client host
 
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
182
                                     until this client is invalid
 
183
    interval:  datetime.timedelta(); How often to start a new checker
 
184
    stop_hook: If set, called by stop() as stop_hook(self)
 
185
    checker:   subprocess.Popen(); a running checker process used
 
186
                                   to see if the client lives.
 
187
                                   'None' if no process is running.
201
188
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
189
    stop_initiator_tag:    - '' -
203
190
    checker_callback_tag:  - '' -
204
191
    checker_command: string; External command which is run to check if
205
192
                     client lives.  %() expansions are done at
206
193
                     runtime with vars(self) as dict, so that for
207
194
                     instance %(name)s can be used in the command.
208
 
    current_checker_command: string; current running checker_command
209
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
210
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
195
    Private attibutes:
 
196
    _timeout: Real variable for 'timeout'
 
197
    _interval: Real variable for 'interval'
 
198
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
199
    _interval_milliseconds: - '' -
211
200
    """
212
 
    def timeout_milliseconds(self):
213
 
        "Return the 'timeout' attribute in milliseconds"
214
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
 
                + (self.timeout.seconds * 1000)
216
 
                + (self.timeout.microseconds // 1000))
217
 
    
218
 
    def interval_milliseconds(self):
219
 
        "Return the 'interval' attribute in milliseconds"
220
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
221
 
                + (self.interval.seconds * 1000)
222
 
                + (self.interval.microseconds // 1000))
223
 
    
224
 
    def __init__(self, name = None, disable_hook=None, config=None,
225
 
                 use_dbus=True):
 
201
    def _set_timeout(self, timeout):
 
202
        "Setter function for 'timeout' attribute"
 
203
        self._timeout = timeout
 
204
        self._timeout_milliseconds = ((self.timeout.days
 
205
                                       * 24 * 60 * 60 * 1000)
 
206
                                      + (self.timeout.seconds * 1000)
 
207
                                      + (self.timeout.microseconds
 
208
                                         // 1000))
 
209
    timeout = property(lambda self: self._timeout,
 
210
                       _set_timeout)
 
211
    del _set_timeout
 
212
    def _set_interval(self, interval):
 
213
        "Setter function for 'interval' attribute"
 
214
        self._interval = interval
 
215
        self._interval_milliseconds = ((self.interval.days
 
216
                                        * 24 * 60 * 60 * 1000)
 
217
                                       + (self.interval.seconds
 
218
                                          * 1000)
 
219
                                       + (self.interval.microseconds
 
220
                                          // 1000))
 
221
    interval = property(lambda self: self._interval,
 
222
                        _set_interval)
 
223
    del _set_interval
 
224
    def __init__(self, name = None, stop_hook=None, config={}):
226
225
        """Note: the 'checker' key in 'config' sets the
227
226
        'checker_command' attribute and *not* the 'checker'
228
227
        attribute."""
229
228
        self.name = name
230
 
        if config is None:
231
 
            config = {}
232
229
        logger.debug(u"Creating client %r", self.name)
233
 
        self.use_dbus = False   # During __init__
234
230
        # Uppercase and remove spaces from fingerprint for later
235
231
        # comparison purposes with return value from the fingerprint()
236
232
        # function
237
 
        self.fingerprint = (config["fingerprint"].upper()
238
 
                            .replace(u" ", u""))
 
233
        self.fingerprint = config["fingerprint"].upper()\
 
234
                           .replace(u" ", u"")
239
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
240
236
        if "secret" in config:
241
237
            self.secret = config["secret"].decode(u"base64")
242
238
        elif "secfile" in config:
243
 
            with closing(open(os.path.expanduser
244
 
                              (os.path.expandvars
245
 
                               (config["secfile"])))) as secfile:
246
 
                self.secret = secfile.read()
 
239
            sf = open(config["secfile"])
 
240
            self.secret = sf.read()
 
241
            sf.close()
247
242
        else:
248
243
            raise TypeError(u"No secret or secfile for client %s"
249
244
                            % self.name)
250
245
        self.host = config.get("host", "")
251
 
        self.created = datetime.datetime.utcnow()
252
 
        self.enabled = False
253
 
        self.last_enabled = None
 
246
        self.created = datetime.datetime.now()
254
247
        self.last_checked_ok = None
255
248
        self.timeout = string_to_delta(config["timeout"])
256
249
        self.interval = string_to_delta(config["interval"])
257
 
        self.disable_hook = disable_hook
 
250
        self.stop_hook = stop_hook
258
251
        self.checker = None
259
252
        self.checker_initiator_tag = None
260
 
        self.disable_initiator_tag = None
 
253
        self.stop_initiator_tag = None
261
254
        self.checker_callback_tag = None
262
 
        self.checker_command = config["checker"]
263
 
        self.current_checker_command = None
264
 
        self.last_connect = None
265
 
        # Only now, when this client is initialized, can it show up on
266
 
        # the D-Bus
267
 
        self.use_dbus = use_dbus
268
 
        if self.use_dbus:
269
 
            self.dbus_object_path = (dbus.ObjectPath
270
 
                                     ("/clients/"
271
 
                                      + self.name.replace(".", "_")))
272
 
            dbus.service.Object.__init__(self, bus,
273
 
                                         self.dbus_object_path)
274
 
    
275
 
    def enable(self):
 
255
        self.check_command = config["checker"]
 
256
    def start(self):
276
257
        """Start this client's checker and timeout hooks"""
277
 
        self.last_enabled = datetime.datetime.utcnow()
278
258
        # Schedule a new checker to be started an 'interval' from now,
279
259
        # and every interval from then on.
280
 
        self.checker_initiator_tag = (gobject.timeout_add
281
 
                                      (self.interval_milliseconds(),
282
 
                                       self.start_checker))
 
260
        self.checker_initiator_tag = gobject.timeout_add\
 
261
                                     (self._interval_milliseconds,
 
262
                                      self.start_checker)
283
263
        # Also start a new checker *right now*.
284
264
        self.start_checker()
285
 
        # Schedule a disable() when 'timeout' has passed
286
 
        self.disable_initiator_tag = (gobject.timeout_add
287
 
                                   (self.timeout_milliseconds(),
288
 
                                    self.disable))
289
 
        self.enabled = True
290
 
        if self.use_dbus:
291
 
            # Emit D-Bus signals
292
 
            self.PropertyChanged(dbus.String(u"enabled"),
293
 
                                 dbus.Boolean(True, variant_level=1))
294
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
295
 
                                 (_datetime_to_dbus(self.last_enabled,
296
 
                                                    variant_level=1)))
297
 
    
298
 
    def disable(self):
299
 
        """Disable this client."""
300
 
        if not getattr(self, "enabled", False):
 
265
        # Schedule a stop() when 'timeout' has passed
 
266
        self.stop_initiator_tag = gobject.timeout_add\
 
267
                                  (self._timeout_milliseconds,
 
268
                                   self.stop)
 
269
    def stop(self):
 
270
        """Stop this client.
 
271
        The possibility that a client might be restarted is left open,
 
272
        but not currently used."""
 
273
        # If this client doesn't have a secret, it is already stopped.
 
274
        if hasattr(self, "secret") and self.secret:
 
275
            logger.info(u"Stopping client %s", self.name)
 
276
            self.secret = None
 
277
        else:
301
278
            return False
302
 
        logger.info(u"Disabling client %s", self.name)
303
 
        if getattr(self, "disable_initiator_tag", False):
304
 
            gobject.source_remove(self.disable_initiator_tag)
305
 
            self.disable_initiator_tag = None
 
279
        if getattr(self, "stop_initiator_tag", False):
 
280
            gobject.source_remove(self.stop_initiator_tag)
 
281
            self.stop_initiator_tag = None
306
282
        if getattr(self, "checker_initiator_tag", False):
307
283
            gobject.source_remove(self.checker_initiator_tag)
308
284
            self.checker_initiator_tag = None
309
285
        self.stop_checker()
310
 
        if self.disable_hook:
311
 
            self.disable_hook(self)
312
 
        self.enabled = False
313
 
        if self.use_dbus:
314
 
            # Emit D-Bus signal
315
 
            self.PropertyChanged(dbus.String(u"enabled"),
316
 
                                 dbus.Boolean(False, variant_level=1))
 
286
        if self.stop_hook:
 
287
            self.stop_hook(self)
317
288
        # Do not run this again if called by a gobject.timeout_add
318
289
        return False
319
 
    
320
290
    def __del__(self):
321
 
        self.disable_hook = None
322
 
        self.disable()
323
 
    
324
 
    def checker_callback(self, pid, condition, command):
 
291
        self.stop_hook = None
 
292
        self.stop()
 
293
    def checker_callback(self, pid, condition):
325
294
        """The checker has completed, so take appropriate actions."""
 
295
        now = datetime.datetime.now()
326
296
        self.checker_callback_tag = None
327
297
        self.checker = None
328
 
        if self.use_dbus:
329
 
            # Emit D-Bus signal
330
 
            self.PropertyChanged(dbus.String(u"checker_running"),
331
 
                                 dbus.Boolean(False, variant_level=1))
332
 
        if os.WIFEXITED(condition):
333
 
            exitstatus = os.WEXITSTATUS(condition)
334
 
            if exitstatus == 0:
335
 
                logger.info(u"Checker for %(name)s succeeded",
336
 
                            vars(self))
337
 
                self.checked_ok()
338
 
            else:
339
 
                logger.info(u"Checker for %(name)s failed",
340
 
                            vars(self))
341
 
            if self.use_dbus:
342
 
                # Emit D-Bus signal
343
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
344
 
                                      dbus.Int64(condition),
345
 
                                      dbus.String(command))
346
 
        else:
 
298
        if os.WIFEXITED(condition) \
 
299
               and (os.WEXITSTATUS(condition) == 0):
 
300
            logger.info(u"Checker for %(name)s succeeded",
 
301
                        vars(self))
 
302
            self.last_checked_ok = now
 
303
            gobject.source_remove(self.stop_initiator_tag)
 
304
            self.stop_initiator_tag = gobject.timeout_add\
 
305
                                      (self._timeout_milliseconds,
 
306
                                       self.stop)
 
307
        elif not os.WIFEXITED(condition):
347
308
            logger.warning(u"Checker for %(name)s crashed?",
348
309
                           vars(self))
349
 
            if self.use_dbus:
350
 
                # Emit D-Bus signal
351
 
                self.CheckerCompleted(dbus.Int16(-1),
352
 
                                      dbus.Int64(condition),
353
 
                                      dbus.String(command))
354
 
    
355
 
    def checked_ok(self):
356
 
        """Bump up the timeout for this client.
357
 
        This should only be called when the client has been seen,
358
 
        alive and well.
359
 
        """
360
 
        self.last_checked_ok = datetime.datetime.utcnow()
361
 
        gobject.source_remove(self.disable_initiator_tag)
362
 
        self.disable_initiator_tag = (gobject.timeout_add
363
 
                                      (self.timeout_milliseconds(),
364
 
                                       self.disable))
365
 
        if self.use_dbus:
366
 
            # Emit D-Bus signal
367
 
            self.PropertyChanged(
368
 
                dbus.String(u"last_checked_ok"),
369
 
                (_datetime_to_dbus(self.last_checked_ok,
370
 
                                   variant_level=1)))
371
 
    
 
310
        else:
 
311
            logger.info(u"Checker for %(name)s failed",
 
312
                        vars(self))
372
313
    def start_checker(self):
373
314
        """Start a new checker subprocess if one is not running.
374
315
        If a checker already exists, leave it running and do
381
322
        # checkers alone, the checker would have to take more time
382
323
        # than 'timeout' for the client to be declared invalid, which
383
324
        # is as it should be.
384
 
        
385
 
        # If a checker exists, make sure it is not a zombie
386
 
        if self.checker is not None:
387
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
 
            if pid:
389
 
                logger.warning("Checker was a zombie")
390
 
                gobject.source_remove(self.checker_callback_tag)
391
 
                self.checker_callback(pid, status,
392
 
                                      self.current_checker_command)
393
 
        # Start a new checker if needed
394
325
        if self.checker is None:
395
326
            try:
396
 
                # In case checker_command has exactly one % operator
397
 
                command = self.checker_command % self.host
 
327
                # In case check_command has exactly one % operator
 
328
                command = self.check_command % self.host
398
329
            except TypeError:
399
330
                # Escape attributes for the shell
400
331
                escaped_attrs = dict((key, re.escape(str(val)))
401
332
                                     for key, val in
402
333
                                     vars(self).iteritems())
403
334
                try:
404
 
                    command = self.checker_command % escaped_attrs
 
335
                    command = self.check_command % escaped_attrs
405
336
                except TypeError, error:
406
337
                    logger.error(u'Could not format string "%s":'
407
 
                                 u' %s', self.checker_command, error)
 
338
                                 u' %s', self.check_command, error)
408
339
                    return True # Try again later
409
 
                self.current_checker_command = command
410
340
            try:
411
341
                logger.info(u"Starting checker %r for %s",
412
342
                            command, self.name)
417
347
                self.checker = subprocess.Popen(command,
418
348
                                                close_fds=True,
419
349
                                                shell=True, cwd="/")
420
 
                if self.use_dbus:
421
 
                    # Emit D-Bus signal
422
 
                    self.CheckerStarted(command)
423
 
                    self.PropertyChanged(
424
 
                        dbus.String("checker_running"),
425
 
                        dbus.Boolean(True, variant_level=1))
426
 
                self.checker_callback_tag = (gobject.child_watch_add
427
 
                                             (self.checker.pid,
428
 
                                              self.checker_callback,
429
 
                                              data=command))
430
 
                # The checker may have completed before the gobject
431
 
                # watch was added.  Check for this.
432
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
 
                if pid:
434
 
                    gobject.source_remove(self.checker_callback_tag)
435
 
                    self.checker_callback(pid, status, command)
 
350
                self.checker_callback_tag = gobject.child_watch_add\
 
351
                                            (self.checker.pid,
 
352
                                             self.checker_callback)
436
353
            except OSError, error:
437
354
                logger.error(u"Failed to start subprocess: %s",
438
355
                             error)
439
356
        # Re-run this periodically if run by gobject.timeout_add
440
357
        return True
441
 
    
442
358
    def stop_checker(self):
443
359
        """Force the checker process, if any, to stop."""
444
360
        if self.checker_callback_tag:
456
372
            if error.errno != errno.ESRCH: # No such process
457
373
                raise
458
374
        self.checker = None
459
 
        if self.use_dbus:
460
 
            self.PropertyChanged(dbus.String(u"checker_running"),
461
 
                                 dbus.Boolean(False, variant_level=1))
462
 
    
463
375
    def still_valid(self):
464
376
        """Has the timeout not yet passed for this client?"""
465
 
        if not getattr(self, "enabled", False):
466
 
            return False
467
 
        now = datetime.datetime.utcnow()
 
377
        now = datetime.datetime.now()
468
378
        if self.last_checked_ok is None:
469
379
            return now < (self.created + self.timeout)
470
380
        else:
471
381
            return now < (self.last_checked_ok + self.timeout)
472
 
    
473
 
    ## D-Bus methods & signals
474
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
475
 
    
476
 
    # CheckedOK - method
477
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
478
 
    CheckedOK.__name__ = "CheckedOK"
479
 
    
480
 
    # CheckerCompleted - signal
481
 
    @dbus.service.signal(_interface, signature="nxs")
482
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
483
 
        "D-Bus signal"
484
 
        pass
485
 
    
486
 
    # CheckerStarted - signal
487
 
    @dbus.service.signal(_interface, signature="s")
488
 
    def CheckerStarted(self, command):
489
 
        "D-Bus signal"
490
 
        pass
491
 
    
492
 
    # GetAllProperties - method
493
 
    @dbus.service.method(_interface, out_signature="a{sv}")
494
 
    def GetAllProperties(self):
495
 
        "D-Bus method"
496
 
        return dbus.Dictionary({
497
 
                dbus.String("name"):
498
 
                    dbus.String(self.name, variant_level=1),
499
 
                dbus.String("fingerprint"):
500
 
                    dbus.String(self.fingerprint, variant_level=1),
501
 
                dbus.String("host"):
502
 
                    dbus.String(self.host, variant_level=1),
503
 
                dbus.String("created"):
504
 
                    _datetime_to_dbus(self.created, variant_level=1),
505
 
                dbus.String("last_enabled"):
506
 
                    (_datetime_to_dbus(self.last_enabled,
507
 
                                       variant_level=1)
508
 
                     if self.last_enabled is not None
509
 
                     else dbus.Boolean(False, variant_level=1)),
510
 
                dbus.String("enabled"):
511
 
                    dbus.Boolean(self.enabled, variant_level=1),
512
 
                dbus.String("last_checked_ok"):
513
 
                    (_datetime_to_dbus(self.last_checked_ok,
514
 
                                       variant_level=1)
515
 
                     if self.last_checked_ok is not None
516
 
                     else dbus.Boolean (False, variant_level=1)),
517
 
                dbus.String("timeout"):
518
 
                    dbus.UInt64(self.timeout_milliseconds(),
519
 
                                variant_level=1),
520
 
                dbus.String("interval"):
521
 
                    dbus.UInt64(self.interval_milliseconds(),
522
 
                                variant_level=1),
523
 
                dbus.String("checker"):
524
 
                    dbus.String(self.checker_command,
525
 
                                variant_level=1),
526
 
                dbus.String("checker_running"):
527
 
                    dbus.Boolean(self.checker is not None,
528
 
                                 variant_level=1),
529
 
                dbus.String("object_path"):
530
 
                    dbus.ObjectPath(self.dbus_object_path,
531
 
                                    variant_level=1)
532
 
                }, signature="sv")
533
 
    
534
 
    # IsStillValid - method
535
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
 
                    (still_valid))
537
 
    IsStillValid.__name__ = "IsStillValid"
538
 
    
539
 
    # PropertyChanged - signal
540
 
    @dbus.service.signal(_interface, signature="sv")
541
 
    def PropertyChanged(self, property, value):
542
 
        "D-Bus signal"
543
 
        pass
544
 
    
545
 
    # SetChecker - method
546
 
    @dbus.service.method(_interface, in_signature="s")
547
 
    def SetChecker(self, checker):
548
 
        "D-Bus setter method"
549
 
        self.checker_command = checker
550
 
        # Emit D-Bus signal
551
 
        self.PropertyChanged(dbus.String(u"checker"),
552
 
                             dbus.String(self.checker_command,
553
 
                                         variant_level=1))
554
 
    
555
 
    # SetHost - method
556
 
    @dbus.service.method(_interface, in_signature="s")
557
 
    def SetHost(self, host):
558
 
        "D-Bus setter method"
559
 
        self.host = host
560
 
        # Emit D-Bus signal
561
 
        self.PropertyChanged(dbus.String(u"host"),
562
 
                             dbus.String(self.host, variant_level=1))
563
 
    
564
 
    # SetInterval - method
565
 
    @dbus.service.method(_interface, in_signature="t")
566
 
    def SetInterval(self, milliseconds):
567
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
 
        # Emit D-Bus signal
569
 
        self.PropertyChanged(dbus.String(u"interval"),
570
 
                             (dbus.UInt64(self.interval_milliseconds(),
571
 
                                          variant_level=1)))
572
 
    
573
 
    # SetSecret - method
574
 
    @dbus.service.method(_interface, in_signature="ay",
575
 
                         byte_arrays=True)
576
 
    def SetSecret(self, secret):
577
 
        "D-Bus setter method"
578
 
        self.secret = str(secret)
579
 
    
580
 
    # SetTimeout - method
581
 
    @dbus.service.method(_interface, in_signature="t")
582
 
    def SetTimeout(self, milliseconds):
583
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
 
        # Emit D-Bus signal
585
 
        self.PropertyChanged(dbus.String(u"timeout"),
586
 
                             (dbus.UInt64(self.timeout_milliseconds(),
587
 
                                          variant_level=1)))
588
 
    
589
 
    # Enable - method
590
 
    Enable = dbus.service.method(_interface)(enable)
591
 
    Enable.__name__ = "Enable"
592
 
    
593
 
    # StartChecker - method
594
 
    @dbus.service.method(_interface)
595
 
    def StartChecker(self):
596
 
        "D-Bus method"
597
 
        self.start_checker()
598
 
    
599
 
    # Disable - method
600
 
    @dbus.service.method(_interface)
601
 
    def Disable(self):
602
 
        "D-Bus method"
603
 
        self.disable()
604
 
    
605
 
    # StopChecker - method
606
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
607
 
    StopChecker.__name__ = "StopChecker"
608
 
    
609
 
    del _interface
610
382
 
611
383
 
612
384
def peer_certificate(session):
613
385
    "Return the peer's OpenPGP certificate as a bytestring"
614
386
    # If not an OpenPGP certificate...
615
 
    if (gnutls.library.functions
616
 
        .gnutls_certificate_type_get(session._c_object)
617
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
387
    if gnutls.library.functions.gnutls_certificate_type_get\
 
388
            (session._c_object) \
 
389
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
618
390
        # ...do the normal thing
619
391
        return session.peer_certificate
620
 
    list_size = ctypes.c_uint(1)
621
 
    cert_list = (gnutls.library.functions
622
 
                 .gnutls_certificate_get_peers
623
 
                 (session._c_object, ctypes.byref(list_size)))
624
 
    if not bool(cert_list) and list_size.value != 0:
625
 
        raise gnutls.errors.GNUTLSError("error getting peer"
626
 
                                        " certificate")
 
392
    list_size = ctypes.c_uint()
 
393
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
394
        (session._c_object, ctypes.byref(list_size))
627
395
    if list_size.value == 0:
628
396
        return None
629
397
    cert = cert_list[0]
633
401
def fingerprint(openpgp):
634
402
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
403
    # New GnuTLS "datum" with the OpenPGP public key
636
 
    datum = (gnutls.library.types
637
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
 
                                         ctypes.POINTER
639
 
                                         (ctypes.c_ubyte)),
640
 
                             ctypes.c_uint(len(openpgp))))
 
404
    datum = gnutls.library.types.gnutls_datum_t\
 
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
406
                     ctypes.POINTER(ctypes.c_ubyte)),
 
407
         ctypes.c_uint(len(openpgp)))
641
408
    # New empty GnuTLS certificate
642
409
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
 
    (gnutls.library.functions
644
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
410
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
411
        (ctypes.byref(crt))
645
412
    # Import the OpenPGP public key into the certificate
646
 
    (gnutls.library.functions
647
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
 
                                gnutls.library.constants
649
 
                                .GNUTLS_OPENPGP_FMT_RAW))
 
413
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
414
                    (crt, ctypes.byref(datum),
 
415
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
650
416
    # Verify the self signature in the key
651
 
    crtverify = ctypes.c_uint()
652
 
    (gnutls.library.functions
653
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
417
    crtverify = ctypes.c_uint();
 
418
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
419
        (crt, 0, ctypes.byref(crtverify))
654
420
    if crtverify.value != 0:
655
421
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
422
        raise gnutls.errors.CertificateSecurityError("Verify failed")
657
423
    # New buffer for the fingerprint
658
 
    buf = ctypes.create_string_buffer(20)
659
 
    buf_len = ctypes.c_size_t()
 
424
    buffer = ctypes.create_string_buffer(20)
 
425
    buffer_length = ctypes.c_size_t()
660
426
    # Get the fingerprint from the certificate into the buffer
661
 
    (gnutls.library.functions
662
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
 
                                         ctypes.byref(buf_len)))
 
427
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
428
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
429
    # Deinit the certificate
665
430
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
431
    # Convert the buffer to a Python bytestring
667
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
432
    fpr = ctypes.string_at(buffer, buffer_length.value)
668
433
    # Convert the bytestring to hexadecimal notation
669
434
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
435
    return hex_fpr
671
436
 
672
437
 
673
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
439
    """A TCP request handler class.
675
440
    Instantiated by IPv6_TCPServer for each request to handle it.
676
441
    Note: This will run in its own forked process."""
677
442
    
678
443
    def handle(self):
679
444
        logger.info(u"TCP connection from: %s",
680
 
                    unicode(self.client_address))
681
 
        logger.debug(u"Pipe: %d", self.server.pipe[1])
682
 
        # Open IPC pipe to parent process
683
 
        with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
684
 
            session = (gnutls.connection
685
 
                       .ClientSession(self.request,
686
 
                                      gnutls.connection
687
 
                                      .X509Credentials()))
688
 
            
689
 
            line = self.request.makefile().readline()
690
 
            logger.debug(u"Protocol version: %r", line)
691
 
            try:
692
 
                if int(line.strip().split()[0]) > 1:
693
 
                    raise RuntimeError
694
 
            except (ValueError, IndexError, RuntimeError), error:
695
 
                logger.error(u"Unknown protocol version: %s", error)
696
 
                return
697
 
            
698
 
            # Note: gnutls.connection.X509Credentials is really a
699
 
            # generic GnuTLS certificate credentials object so long as
700
 
            # no X.509 keys are added to it.  Therefore, we can use it
701
 
            # here despite using OpenPGP certificates.
702
 
            
703
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
704
 
            #                     "+AES-256-CBC", "+SHA1",
705
 
            #                     "+COMP-NULL", "+CTYPE-OPENPGP",
706
 
            #                     "+DHE-DSS"))
707
 
            # Use a fallback default, since this MUST be set.
708
 
            priority = self.server.settings.get("priority", "NORMAL")
709
 
            (gnutls.library.functions
710
 
             .gnutls_priority_set_direct(session._c_object,
711
 
                                         priority, None))
712
 
            
713
 
            try:
714
 
                session.handshake()
715
 
            except gnutls.errors.GNUTLSError, error:
716
 
                logger.warning(u"Handshake failed: %s", error)
717
 
                # Do not run session.bye() here: the session is not
718
 
                # established.  Just abandon the request.
719
 
                return
720
 
            logger.debug(u"Handshake succeeded")
721
 
            try:
722
 
                fpr = fingerprint(peer_certificate(session))
723
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
724
 
                logger.warning(u"Bad certificate: %s", error)
725
 
                session.bye()
726
 
                return
727
 
            logger.debug(u"Fingerprint: %s", fpr)
728
 
            
729
 
            for c in self.server.clients:
730
 
                if c.fingerprint == fpr:
731
 
                    client = c
732
 
                    break
733
 
            else:
734
 
                logger.warning(u"Client not found for fingerprint: %s",
735
 
                               fpr)
736
 
                ipc.write("NOTFOUND %s\n" % fpr)
737
 
                session.bye()
738
 
                return
739
 
            # Have to check if client.still_valid(), since it is
740
 
            # possible that the client timed out while establishing
741
 
            # the GnuTLS session.
742
 
            if not client.still_valid():
743
 
                logger.warning(u"Client %(name)s is invalid",
744
 
                               vars(client))
745
 
                ipc.write("INVALID %s\n" % client.name)
746
 
                session.bye()
747
 
                return
748
 
            ipc.write("SENDING %s\n" % client.name)
749
 
            sent_size = 0
750
 
            while sent_size < len(client.secret):
751
 
                sent = session.send(client.secret[sent_size:])
752
 
                logger.debug(u"Sent: %d, remaining: %d",
753
 
                             sent, len(client.secret)
754
 
                             - (sent_size + sent))
755
 
                sent_size += sent
756
 
            session.bye()
757
 
 
758
 
 
759
 
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
760
 
    """Like SocketServer.ForkingMixIn, but also pass a pipe.
761
 
    Assumes a gobject.MainLoop event loop.
762
 
    """
763
 
    def process_request(self, request, client_address):
764
 
        """This overrides and wraps the original process_request().
765
 
        This function creates a new pipe in self.pipe 
766
 
        """
767
 
        self.pipe = os.pipe()
768
 
        super(ForkingMixInWithPipe,
769
 
              self).process_request(request, client_address)
770
 
        os.close(self.pipe[1])  # close write end
771
 
        # Call "handle_ipc" for both data and EOF events
772
 
        gobject.io_add_watch(self.pipe[0],
773
 
                             gobject.IO_IN | gobject.IO_HUP,
774
 
                             self.handle_ipc)
775
 
    def handle_ipc(source, condition):
776
 
        """Dummy function; override as necessary"""
777
 
        os.close(source)
778
 
        return False
779
 
 
780
 
 
781
 
class IPv6_TCPServer(ForkingMixInWithPipe,
782
 
                     SocketServer.TCPServer, object):
783
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
445
                     unicode(self.client_address))
 
446
        session = gnutls.connection.ClientSession\
 
447
                  (self.request, gnutls.connection.X509Credentials())
 
448
        
 
449
        line = self.request.makefile().readline()
 
450
        logger.debug(u"Protocol version: %r", line)
 
451
        try:
 
452
            if int(line.strip().split()[0]) > 1:
 
453
                raise RuntimeError
 
454
        except (ValueError, IndexError, RuntimeError), error:
 
455
            logger.error(u"Unknown protocol version: %s", error)
 
456
            return
 
457
        
 
458
        # Note: gnutls.connection.X509Credentials is really a generic
 
459
        # GnuTLS certificate credentials object so long as no X.509
 
460
        # keys are added to it.  Therefore, we can use it here despite
 
461
        # using OpenPGP certificates.
 
462
        
 
463
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
464
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
465
        #                "+DHE-DSS"))
 
466
        priority = "NORMAL"             # Fallback default, since this
 
467
                                        # MUST be set.
 
468
        if self.server.settings["priority"]:
 
469
            priority = self.server.settings["priority"]
 
470
        gnutls.library.functions.gnutls_priority_set_direct\
 
471
            (session._c_object, priority, None);
 
472
        
 
473
        try:
 
474
            session.handshake()
 
475
        except gnutls.errors.GNUTLSError, error:
 
476
            logger.warning(u"Handshake failed: %s", error)
 
477
            # Do not run session.bye() here: the session is not
 
478
            # established.  Just abandon the request.
 
479
            return
 
480
        try:
 
481
            fpr = fingerprint(peer_certificate(session))
 
482
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
483
            logger.warning(u"Bad certificate: %s", error)
 
484
            session.bye()
 
485
            return
 
486
        logger.debug(u"Fingerprint: %s", fpr)
 
487
        client = None
 
488
        for c in self.server.clients:
 
489
            if c.fingerprint == fpr:
 
490
                client = c
 
491
                break
 
492
        if not client:
 
493
            logger.warning(u"Client not found for fingerprint: %s",
 
494
                           fpr)
 
495
            session.bye()
 
496
            return
 
497
        # Have to check if client.still_valid(), since it is possible
 
498
        # that the client timed out while establishing the GnuTLS
 
499
        # session.
 
500
        if not client.still_valid():
 
501
            logger.warning(u"Client %(name)s is invalid",
 
502
                           vars(client))
 
503
            session.bye()
 
504
            return
 
505
        sent_size = 0
 
506
        while sent_size < len(client.secret):
 
507
            sent = session.send(client.secret[sent_size:])
 
508
            logger.debug(u"Sent: %d, remaining: %d",
 
509
                         sent, len(client.secret)
 
510
                         - (sent_size + sent))
 
511
            sent_size += sent
 
512
        session.bye()
 
513
 
 
514
 
 
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
516
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
784
517
    Attributes:
785
518
        settings:       Server settings
786
519
        clients:        Set() of Client objects
787
 
        enabled:        Boolean; whether this server is activated yet
788
520
    """
789
521
    address_family = socket.AF_INET6
790
522
    def __init__(self, *args, **kwargs):
794
526
        if "clients" in kwargs:
795
527
            self.clients = kwargs["clients"]
796
528
            del kwargs["clients"]
797
 
        if "use_ipv6" in kwargs:
798
 
            if not kwargs["use_ipv6"]:
799
 
                self.address_family = socket.AF_INET
800
 
            del kwargs["use_ipv6"]
801
 
        self.enabled = False
802
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
529
        return super(type(self), self).__init__(*args, **kwargs)
803
530
    def server_bind(self):
804
531
        """This overrides the normal server_bind() function
805
532
        to bind to an interface if one was specified, and also NOT to
817
544
                                 u" bind to interface %s",
818
545
                                 self.settings["interface"])
819
546
                else:
820
 
                    raise
 
547
                    raise error
821
548
        # Only bind(2) the socket if we really need to.
822
549
        if self.server_address[0] or self.server_address[1]:
823
550
            if not self.server_address[0]:
824
 
                if self.address_family == socket.AF_INET6:
825
 
                    any_address = "::" # in6addr_any
826
 
                else:
827
 
                    any_address = socket.INADDR_ANY
828
 
                self.server_address = (any_address,
 
551
                in6addr_any = "::"
 
552
                self.server_address = (in6addr_any,
829
553
                                       self.server_address[1])
830
554
            elif not self.server_address[1]:
831
555
                self.server_address = (self.server_address[0],
837
561
#                                            if_nametoindex
838
562
#                                            (self.settings
839
563
#                                             ["interface"]))
840
 
            return super(IPv6_TCPServer, self).server_bind()
841
 
    def server_activate(self):
842
 
        if self.enabled:
843
 
            return super(IPv6_TCPServer, self).server_activate()
844
 
    def enable(self):
845
 
        self.enabled = True
846
 
    def handle_ipc(self, source, condition, file_objects={}):
847
 
        logger.debug("Handling IPC: %r : %r", source, condition)
848
 
        
849
 
        # Turn a file descriptor into a Python file object
850
 
        if source not in file_objects:
851
 
            file_objects[source] = os.fdopen(source, "r", 1)
852
 
        
853
 
        # Read a line from the file object
854
 
        cmdline = file_objects[source].readline()
855
 
        if not cmdline:             # Empty line means end of file
856
 
            # close the IPC pipe
857
 
            logger.debug("Closing: %r", source)
858
 
            file_objects[source].close()
859
 
            del file_objects[source]
860
 
 
861
 
            # Stop calling this function
862
 
            return False
863
 
        
864
 
        logger.debug("IPC command: %r\n" % cmdline)
865
 
        
866
 
        # Parse and act on command
867
 
        cmd, args = cmdline.split(None, 1)
868
 
        if cmd == "NOTFOUND":
869
 
            pass                # xxx
870
 
        elif cmd == "INVALID":
871
 
            pass                # xxx
872
 
        elif cmd == "SENDING":
873
 
            pass                # xxx
874
 
            # client.checked_ok()
875
 
        else:
876
 
            logger.error("Unknown IPC command: %r", cmdline)
877
 
        
878
 
        # Keep calling this function
879
 
        return True
 
564
            return super(type(self), self).server_bind()
880
565
 
881
566
 
882
567
def string_to_delta(interval):
883
568
    """Parse a string and return a datetime.timedelta
884
 
    
 
569
 
885
570
    >>> string_to_delta('7d')
886
571
    datetime.timedelta(7)
887
572
    >>> string_to_delta('60s')
898
583
    timevalue = datetime.timedelta(0)
899
584
    for s in interval.split():
900
585
        try:
901
 
            suffix = unicode(s[-1])
902
 
            value = int(s[:-1])
 
586
            suffix=unicode(s[-1])
 
587
            value=int(s[:-1])
903
588
            if suffix == u"d":
904
589
                delta = datetime.timedelta(value)
905
590
            elif suffix == u"s":
939
624
    elif state == avahi.ENTRY_GROUP_FAILURE:
940
625
        logger.critical(u"Avahi: Error in group state changed %s",
941
626
                        unicode(error))
942
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
627
        raise AvahiGroupError("State changed: %s", str(error))
943
628
 
944
629
def if_nametoindex(interface):
945
630
    """Call the C function if_nametoindex(), or equivalent"""
946
631
    global if_nametoindex
947
632
    try:
948
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
949
 
                          (ctypes.util.find_library("c"))
950
 
                          .if_nametoindex)
 
633
        if "ctypes.util" not in sys.modules:
 
634
            import ctypes.util
 
635
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
636
            (ctypes.util.find_library("c")).if_nametoindex
951
637
    except (OSError, AttributeError):
952
638
        if "struct" not in sys.modules:
953
639
            import struct
956
642
        def if_nametoindex(interface):
957
643
            "Get an interface index the hard way, i.e. using fcntl()"
958
644
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
959
 
            with closing(socket.socket()) as s:
960
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
961
 
                                    struct.pack("16s16x", interface))
 
645
            s = socket.socket()
 
646
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
647
                                struct.pack("16s16x", interface))
 
648
            s.close()
962
649
            interface_index = struct.unpack("I", ifreq[16:20])[0]
963
650
            return interface_index
964
651
    return if_nametoindex(interface)
988
675
 
989
676
 
990
677
def main():
991
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
678
    global main_loop_started
 
679
    main_loop_started = False
 
680
    
 
681
    parser = OptionParser(version = "%%prog %s" % version)
992
682
    parser.add_option("-i", "--interface", type="string",
993
683
                      metavar="IF", help="Bind to interface IF")
994
684
    parser.add_option("-a", "--address", type="string",
995
685
                      help="Address to listen for requests on")
996
686
    parser.add_option("-p", "--port", type="int",
997
687
                      help="Port number to receive requests on")
998
 
    parser.add_option("--check", action="store_true",
 
688
    parser.add_option("--check", action="store_true", default=False,
999
689
                      help="Run self-test")
1000
690
    parser.add_option("--debug", action="store_true",
1001
691
                      help="Debug mode; run in foreground and log to"
1008
698
                      default="/etc/mandos", metavar="DIR",
1009
699
                      help="Directory to search for configuration"
1010
700
                      " files")
1011
 
    parser.add_option("--no-dbus", action="store_false",
1012
 
                      dest="use_dbus",
1013
 
                      help="Do not provide D-Bus system bus"
1014
 
                      " interface")
1015
 
    parser.add_option("--no-ipv6", action="store_false",
1016
 
                      dest="use_ipv6", help="Do not use IPv6")
1017
 
    options = parser.parse_args()[0]
 
701
    (options, args) = parser.parse_args()
1018
702
    
1019
703
    if options.check:
1020
704
        import doctest
1029
713
                        "priority":
1030
714
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1031
715
                        "servicename": "Mandos",
1032
 
                        "use_dbus": "True",
1033
 
                        "use_ipv6": "True",
1034
716
                        }
1035
717
    
1036
718
    # Parse config file for server-global settings
1039
721
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1040
722
    # Convert the SafeConfigParser object to a dict
1041
723
    server_settings = server_config.defaults()
1042
 
    # Use the appropriate methods on the non-string config options
1043
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
1044
 
                                                        "debug")
1045
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1046
 
                                                           "use_dbus")
1047
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1048
 
                                                           "use_ipv6")
1049
 
    if server_settings["port"]:
1050
 
        server_settings["port"] = server_config.getint("DEFAULT",
1051
 
                                                       "port")
 
724
    # Use getboolean on the boolean config option
 
725
    server_settings["debug"] = server_config.getboolean\
 
726
                               ("DEFAULT", "debug")
1052
727
    del server_config
1053
728
    
1054
729
    # Override the settings from the config file with command line
1055
730
    # options, if set.
1056
731
    for option in ("interface", "address", "port", "debug",
1057
 
                   "priority", "servicename", "configdir",
1058
 
                   "use_dbus", "use_ipv6"):
 
732
                   "priority", "servicename", "configdir"):
1059
733
        value = getattr(options, option)
1060
734
        if value is not None:
1061
735
            server_settings[option] = value
1062
736
    del options
1063
737
    # Now we have our good server settings in "server_settings"
1064
738
    
1065
 
    # For convenience
1066
739
    debug = server_settings["debug"]
1067
 
    use_dbus = server_settings["use_dbus"]
1068
 
    use_ipv6 = server_settings["use_ipv6"]
1069
740
    
1070
741
    if not debug:
1071
742
        syslogger.setLevel(logging.WARNING)
1072
743
        console.setLevel(logging.WARNING)
1073
744
    
1074
745
    if server_settings["servicename"] != "Mandos":
1075
 
        syslogger.setFormatter(logging.Formatter
 
746
        syslogger.setFormatter(logging.Formatter\
1076
747
                               ('Mandos (%s): %%(levelname)s:'
1077
748
                                ' %%(message)s'
1078
749
                                % server_settings["servicename"]))
1080
751
    # Parse config file with clients
1081
752
    client_defaults = { "timeout": "1h",
1082
753
                        "interval": "5m",
1083
 
                        "checker": "fping -q -- %%(host)s",
 
754
                        "checker": "fping -q -- %(host)s",
1084
755
                        "host": "",
1085
756
                        }
1086
757
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1087
758
    client_config.read(os.path.join(server_settings["configdir"],
1088
759
                                    "clients.conf"))
1089
760
    
1090
 
    clients = Set()
1091
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1092
 
                                 server_settings["port"]),
1093
 
                                TCP_handler,
1094
 
                                settings=server_settings,
1095
 
                                clients=clients, use_ipv6=use_ipv6)
1096
 
    pidfilename = "/var/run/mandos.pid"
1097
 
    try:
1098
 
        pidfile = open(pidfilename, "w")
1099
 
    except IOError:
1100
 
        logger.error("Could not open file %r", pidfilename)
1101
 
    
1102
 
    try:
1103
 
        uid = pwd.getpwnam("_mandos").pw_uid
1104
 
        gid = pwd.getpwnam("_mandos").pw_gid
1105
 
    except KeyError:
1106
 
        try:
1107
 
            uid = pwd.getpwnam("mandos").pw_uid
1108
 
            gid = pwd.getpwnam("mandos").pw_gid
1109
 
        except KeyError:
1110
 
            try:
1111
 
                uid = pwd.getpwnam("nobody").pw_uid
1112
 
                gid = pwd.getpwnam("nogroup").pw_gid
1113
 
            except KeyError:
1114
 
                uid = 65534
1115
 
                gid = 65534
1116
 
    try:
1117
 
        os.setgid(gid)
1118
 
        os.setuid(uid)
1119
 
    except OSError, error:
1120
 
        if error[0] != errno.EPERM:
1121
 
            raise error
1122
 
    
1123
 
    # Enable all possible GnuTLS debugging
1124
 
    if debug:
1125
 
        # "Use a log level over 10 to enable all debugging options."
1126
 
        # - GnuTLS manual
1127
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1128
 
        
1129
 
        @gnutls.library.types.gnutls_log_func
1130
 
        def debug_gnutls(level, string):
1131
 
            logger.debug("GnuTLS: %s", string[:-1])
1132
 
        
1133
 
        (gnutls.library.functions
1134
 
         .gnutls_global_set_log_function(debug_gnutls))
1135
 
    
1136
761
    global service
1137
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1138
762
    service = AvahiService(name = server_settings["servicename"],
1139
 
                           servicetype = "_mandos._tcp",
1140
 
                           protocol = protocol)
 
763
                           type = "_mandos._tcp", );
1141
764
    if server_settings["interface"]:
1142
 
        service.interface = (if_nametoindex
1143
 
                             (server_settings["interface"]))
 
765
        service.interface = if_nametoindex\
 
766
                            (server_settings["interface"])
1144
767
    
1145
768
    global main_loop
1146
769
    global bus
1153
776
                                           avahi.DBUS_PATH_SERVER),
1154
777
                            avahi.DBUS_INTERFACE_SERVER)
1155
778
    # End of Avahi example code
1156
 
    if use_dbus:
1157
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
779
    
 
780
    clients = Set()
 
781
    def remove_from_clients(client):
 
782
        clients.remove(client)
 
783
        if not clients:
 
784
            logger.critical(u"No clients left, exiting")
 
785
            sys.exit()
1158
786
    
1159
787
    clients.update(Set(Client(name = section,
 
788
                              stop_hook = remove_from_clients,
1160
789
                              config
1161
 
                              = dict(client_config.items(section)),
1162
 
                              use_dbus = use_dbus)
 
790
                              = dict(client_config.items(section)))
1163
791
                       for section in client_config.sections()))
1164
792
    if not clients:
1165
 
        logger.warning(u"No clients defined")
 
793
        logger.critical(u"No clients defined")
 
794
        sys.exit(1)
1166
795
    
1167
796
    if debug:
1168
797
        # Redirect stdin so all checkers get /dev/null
1176
805
        # Close all input and output, do double fork, etc.
1177
806
        daemon()
1178
807
    
 
808
    pidfilename = "/var/run/mandos/mandos.pid"
 
809
    pid = os.getpid()
1179
810
    try:
1180
 
        pid = os.getpid()
 
811
        pidfile = open(pidfilename, "w")
1181
812
        pidfile.write(str(pid) + "\n")
1182
813
        pidfile.close()
1183
814
        del pidfile
1184
 
    except IOError:
1185
 
        logger.error(u"Could not write to file %r with PID %d",
1186
 
                     pidfilename, pid)
1187
 
    except NameError:
1188
 
        # "pidfile" was never created
1189
 
        pass
1190
 
    del pidfilename
 
815
    except IOError, err:
 
816
        logger.error(u"Could not write %s file with PID %d",
 
817
                     pidfilename, os.getpid())
1191
818
    
1192
819
    def cleanup():
1193
820
        "Cleanup function; run on exit"
1200
827
        
1201
828
        while clients:
1202
829
            client = clients.pop()
1203
 
            client.disable_hook = None
1204
 
            client.disable()
 
830
            client.stop_hook = None
 
831
            client.stop()
1205
832
    
1206
833
    atexit.register(cleanup)
1207
834
    
1210
837
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1211
838
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1212
839
    
1213
 
    if use_dbus:
1214
 
        class MandosServer(dbus.service.Object):
1215
 
            """A D-Bus proxy object"""
1216
 
            def __init__(self):
1217
 
                dbus.service.Object.__init__(self, bus, "/")
1218
 
            _interface = u"se.bsnet.fukt.Mandos"
1219
 
            
1220
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1221
 
            def ClientAdded(self, objpath, properties):
1222
 
                "D-Bus signal"
1223
 
                pass
1224
 
            
1225
 
            @dbus.service.signal(_interface, signature="os")
1226
 
            def ClientRemoved(self, objpath, name):
1227
 
                "D-Bus signal"
1228
 
                pass
1229
 
            
1230
 
            @dbus.service.method(_interface, out_signature="ao")
1231
 
            def GetAllClients(self):
1232
 
                "D-Bus method"
1233
 
                return dbus.Array(c.dbus_object_path for c in clients)
1234
 
            
1235
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1236
 
            def GetAllClientsWithProperties(self):
1237
 
                "D-Bus method"
1238
 
                return dbus.Dictionary(
1239
 
                    ((c.dbus_object_path, c.GetAllProperties())
1240
 
                     for c in clients),
1241
 
                    signature="oa{sv}")
1242
 
            
1243
 
            @dbus.service.method(_interface, in_signature="o")
1244
 
            def RemoveClient(self, object_path):
1245
 
                "D-Bus method"
1246
 
                for c in clients:
1247
 
                    if c.dbus_object_path == object_path:
1248
 
                        clients.remove(c)
1249
 
                        # Don't signal anything except ClientRemoved
1250
 
                        c.use_dbus = False
1251
 
                        c.disable()
1252
 
                        # Emit D-Bus signal
1253
 
                        self.ClientRemoved(object_path, c.name)
1254
 
                        return
1255
 
                raise KeyError
1256
 
            
1257
 
            del _interface
1258
 
        
1259
 
        mandos_server = MandosServer()
1260
 
    
1261
840
    for client in clients:
1262
 
        if use_dbus:
1263
 
            # Emit D-Bus signal
1264
 
            mandos_server.ClientAdded(client.dbus_object_path,
1265
 
                                      client.GetAllProperties())
1266
 
        client.enable()
1267
 
    
1268
 
    tcp_server.enable()
1269
 
    tcp_server.server_activate()
1270
 
    
 
841
        client.start()
 
842
    
 
843
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
844
                                 server_settings["port"]),
 
845
                                tcp_handler,
 
846
                                settings=server_settings,
 
847
                                clients=clients)
1271
848
    # Find out what port we got
1272
849
    service.port = tcp_server.socket.getsockname()[1]
1273
 
    if use_ipv6:
1274
 
        logger.info(u"Now listening on address %r, port %d,"
1275
 
                    " flowinfo %d, scope_id %d"
1276
 
                    % tcp_server.socket.getsockname())
1277
 
    else:                       # IPv4
1278
 
        logger.info(u"Now listening on address %r, port %d"
1279
 
                    % tcp_server.socket.getsockname())
 
850
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
851
                u" scope_id %d" % tcp_server.socket.getsockname())
1280
852
    
1281
853
    #service.interface = tcp_server.socket.getsockname()[3]
1282
854
    
1292
864
        
1293
865
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1294
866
                             lambda *args, **kwargs:
1295
 
                             (tcp_server.handle_request
1296
 
                              (*args[2:], **kwargs) or True))
 
867
                             tcp_server.handle_request\
 
868
                             (*args[2:], **kwargs) or True)
1297
869
        
1298
870
        logger.debug(u"Starting main loop")
 
871
        main_loop_started = True
1299
872
        main_loop.run()
1300
873
    except AvahiError, error:
1301
 
        logger.critical(u"AvahiError: %s", error)
 
874
        logger.critical(u"AvahiError: %s" + unicode(error))
1302
875
        sys.exit(1)
1303
876
    except KeyboardInterrupt:
1304
877
        if debug:
1305
 
            print >> sys.stderr
1306
 
        logger.debug("Server received KeyboardInterrupt")
1307
 
    logger.debug("Server exiting")
 
878
            print
1308
879
 
1309
880
if __name__ == '__main__':
1310
881
    main()