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Lines of Context:
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# and some lines in "main".
12
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
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17
16
# 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
25
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#     GNU General Public License for more details.
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27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
30
28
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
33
31
 
34
 
from __future__ import division, with_statement, absolute_import
 
32
from __future__ import division
35
33
 
36
34
import SocketServer
37
35
import socket
38
 
import optparse
 
36
import select
 
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
 
import pwd
59
 
from contextlib import closing
60
57
 
61
58
import dbus
62
 
import dbus.service
63
59
import gobject
64
60
import avahi
65
61
from dbus.mainloop.glib import DBusGMainLoop
66
62
import ctypes
67
 
import ctypes.util
68
63
 
69
 
version = "1.0.5"
70
64
 
71
65
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'))
 
66
syslogger = logging.handlers.SysLogHandler\
 
67
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
68
syslogger.setFormatter(logging.Formatter\
 
69
                        ('%(levelname)s: %(message)s'))
78
70
logger.addHandler(syslogger)
 
71
del syslogger
79
72
 
80
 
console = logging.StreamHandler()
81
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
 
                                       ' %(levelname)s: %(message)s'))
83
 
logger.addHandler(console)
84
73
 
85
74
class AvahiError(Exception):
86
 
    def __init__(self, value, *args, **kwargs):
 
75
    def __init__(self, value):
87
76
        self.value = value
88
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
89
 
    def __unicode__(self):
90
 
        return unicode(repr(self.value))
 
77
    def __str__(self):
 
78
        return repr(self.value)
91
79
 
92
80
class AvahiServiceError(AvahiError):
93
81
    pass
113
101
                  a sensible number of times
114
102
    """
115
103
    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):
 
104
                 type = None, port = None, TXT = None, domain = "",
 
105
                 host = "", max_renames = 12):
119
106
        self.interface = interface
120
107
        self.name = name
121
 
        self.type = servicetype
 
108
        self.type = type
122
109
        self.port = port
123
 
        self.TXT = TXT if TXT is not None else []
 
110
        if TXT is None:
 
111
            self.TXT = []
 
112
        else:
 
113
            self.TXT = TXT
124
114
        self.domain = domain
125
115
        self.host = host
126
116
        self.rename_count = 0
127
 
        self.max_renames = max_renames
128
 
        self.protocol = protocol
129
117
    def rename(self):
130
118
        """Derived from the Avahi example code"""
131
119
        if self.rename_count >= self.max_renames:
132
 
            logger.critical(u"No suitable Zeroconf service name found"
133
 
                            u" after %i retries, exiting.",
134
 
                            self.rename_count)
135
 
            raise AvahiServiceError(u"Too many renames")
136
 
        self.name = server.GetAlternativeServiceName(self.name)
137
 
        logger.info(u"Changing Zeroconf service name to %r ...",
138
 
                    str(self.name))
139
 
        syslogger.setFormatter(logging.Formatter
140
 
                               ('Mandos (%s): %%(levelname)s:'
141
 
                                ' %%(message)s' % self.name))
 
120
            logger.critical(u"No suitable service name found after %i"
 
121
                            u" retries, exiting.", rename_count)
 
122
            raise AvahiServiceError("Too many renames")
 
123
        name = server.GetAlternativeServiceName(name)
 
124
        logger.error(u"Changing name to %r ...", name)
142
125
        self.remove()
143
126
        self.add()
144
127
        self.rename_count += 1
150
133
        """Derived from the Avahi example code"""
151
134
        global group
152
135
        if group is None:
153
 
            group = dbus.Interface(bus.get_object
154
 
                                   (avahi.DBUS_NAME,
 
136
            group = dbus.Interface\
 
137
                    (bus.get_object(avahi.DBUS_NAME,
155
138
                                    server.EntryGroupNew()),
156
 
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
139
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
140
            group.connect_to_signal('StateChanged',
158
141
                                    entry_group_state_changed)
159
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
142
        logger.debug(u"Adding service '%s' of type '%s' ...",
160
143
                     service.name, service.type)
161
144
        group.AddService(
162
145
                self.interface,         # interface
163
 
                self.protocol,          # protocol
 
146
                avahi.PROTO_INET6,      # protocol
164
147
                dbus.UInt32(0),         # flags
165
148
                self.name, self.type,
166
149
                self.domain, self.host,
173
156
# End of Avahi example code
174
157
 
175
158
 
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):
 
159
class Client(object):
182
160
    """A representation of a client host served by this server.
183
161
    Attributes:
184
 
    name:       string; from the config file, used in log messages and
185
 
                        D-Bus identifiers
 
162
    name:      string; from the config file, used in log messages
186
163
    fingerprint: string (40 or 32 hexadecimal digits); used to
187
164
                 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.
 
165
    secret:    bytestring; sent verbatim (over TLS) to client
 
166
    fqdn:      string (FQDN); available for use by the checker command
 
167
    created:   datetime.datetime(); object creation, not client host
 
168
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
169
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
170
                                     until this client is invalid
 
171
    interval:  datetime.timedelta(); How often to start a new checker
 
172
    stop_hook: If set, called by stop() as stop_hook(self)
 
173
    checker:   subprocess.Popen(); a running checker process used
 
174
                                   to see if the client lives.
 
175
                                   'None' if no process is running.
201
176
    checker_initiator_tag: a gobject event source tag, or None
202
 
    disable_initiator_tag:    - '' -
 
177
    stop_initiator_tag:    - '' -
203
178
    checker_callback_tag:  - '' -
204
179
    checker_command: string; External command which is run to check if
205
180
                     client lives.  %() expansions are done at
206
181
                     runtime with vars(self) as dict, so that for
207
182
                     instance %(name)s can be used in the command.
208
 
    use_dbus: bool(); Whether to provide D-Bus interface and signals
209
 
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
 
183
    Private attibutes:
 
184
    _timeout: Real variable for 'timeout'
 
185
    _interval: Real variable for 'interval'
 
186
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
187
    _interval_milliseconds: - '' -
210
188
    """
211
 
    def timeout_milliseconds(self):
212
 
        "Return the 'timeout' attribute in milliseconds"
213
 
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
 
                + (self.timeout.seconds * 1000)
215
 
                + (self.timeout.microseconds // 1000))
216
 
    
217
 
    def interval_milliseconds(self):
218
 
        "Return the 'interval' attribute in milliseconds"
219
 
        return ((self.interval.days * 24 * 60 * 60 * 1000)
220
 
                + (self.interval.seconds * 1000)
221
 
                + (self.interval.microseconds // 1000))
222
 
    
223
 
    def __init__(self, name = None, disable_hook=None, config=None,
224
 
                 use_dbus=True):
 
189
    def _set_timeout(self, timeout):
 
190
        "Setter function for 'timeout' attribute"
 
191
        self._timeout = timeout
 
192
        self._timeout_milliseconds = ((self.timeout.days
 
193
                                       * 24 * 60 * 60 * 1000)
 
194
                                      + (self.timeout.seconds * 1000)
 
195
                                      + (self.timeout.microseconds
 
196
                                         // 1000))
 
197
    timeout = property(lambda self: self._timeout,
 
198
                       _set_timeout)
 
199
    del _set_timeout
 
200
    def _set_interval(self, interval):
 
201
        "Setter function for 'interval' attribute"
 
202
        self._interval = interval
 
203
        self._interval_milliseconds = ((self.interval.days
 
204
                                        * 24 * 60 * 60 * 1000)
 
205
                                       + (self.interval.seconds
 
206
                                          * 1000)
 
207
                                       + (self.interval.microseconds
 
208
                                          // 1000))
 
209
    interval = property(lambda self: self._interval,
 
210
                        _set_interval)
 
211
    del _set_interval
 
212
    def __init__(self, name = None, stop_hook=None, config={}):
225
213
        """Note: the 'checker' key in 'config' sets the
226
214
        'checker_command' attribute and *not* the 'checker'
227
215
        attribute."""
228
216
        self.name = name
229
 
        if config is None:
230
 
            config = {}
231
217
        logger.debug(u"Creating client %r", self.name)
232
 
        self.use_dbus = False   # During __init__
233
218
        # Uppercase and remove spaces from fingerprint for later
234
219
        # comparison purposes with return value from the fingerprint()
235
220
        # function
236
 
        self.fingerprint = (config["fingerprint"].upper()
237
 
                            .replace(u" ", u""))
 
221
        self.fingerprint = config["fingerprint"].upper()\
 
222
                           .replace(u" ", u"")
238
223
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
239
224
        if "secret" in config:
240
225
            self.secret = config["secret"].decode(u"base64")
241
226
        elif "secfile" in config:
242
 
            with closing(open(os.path.expanduser
243
 
                              (os.path.expandvars
244
 
                               (config["secfile"])))) as secfile:
245
 
                self.secret = secfile.read()
 
227
            sf = open(config["secfile"])
 
228
            self.secret = sf.read()
 
229
            sf.close()
246
230
        else:
247
231
            raise TypeError(u"No secret or secfile for client %s"
248
232
                            % self.name)
249
 
        self.host = config.get("host", "")
250
 
        self.created = datetime.datetime.utcnow()
251
 
        self.enabled = False
252
 
        self.last_enabled = None
 
233
        self.fqdn = config.get("fqdn", "")
 
234
        self.created = datetime.datetime.now()
253
235
        self.last_checked_ok = None
254
236
        self.timeout = string_to_delta(config["timeout"])
255
237
        self.interval = string_to_delta(config["interval"])
256
 
        self.disable_hook = disable_hook
 
238
        self.stop_hook = stop_hook
257
239
        self.checker = None
258
240
        self.checker_initiator_tag = None
259
 
        self.disable_initiator_tag = None
 
241
        self.stop_initiator_tag = None
260
242
        self.checker_callback_tag = None
261
 
        self.checker_command = config["checker"]
262
 
        self.last_connect = None
263
 
        # Only now, when this client is initialized, can it show up on
264
 
        # the D-Bus
265
 
        self.use_dbus = use_dbus
266
 
        if self.use_dbus:
267
 
            self.dbus_object_path = (dbus.ObjectPath
268
 
                                     ("/clients/"
269
 
                                      + self.name.replace(".", "_")))
270
 
            dbus.service.Object.__init__(self, bus,
271
 
                                         self.dbus_object_path)
272
 
    
273
 
    def enable(self):
 
243
        self.check_command = config["checker"]
 
244
    def start(self):
274
245
        """Start this client's checker and timeout hooks"""
275
 
        self.last_enabled = datetime.datetime.utcnow()
276
246
        # Schedule a new checker to be started an 'interval' from now,
277
247
        # and every interval from then on.
278
 
        self.checker_initiator_tag = (gobject.timeout_add
279
 
                                      (self.interval_milliseconds(),
280
 
                                       self.start_checker))
 
248
        self.checker_initiator_tag = gobject.timeout_add\
 
249
                                     (self._interval_milliseconds,
 
250
                                      self.start_checker)
281
251
        # Also start a new checker *right now*.
282
252
        self.start_checker()
283
 
        # Schedule a disable() when 'timeout' has passed
284
 
        self.disable_initiator_tag = (gobject.timeout_add
285
 
                                   (self.timeout_milliseconds(),
286
 
                                    self.disable))
287
 
        self.enabled = True
288
 
        if self.use_dbus:
289
 
            # Emit D-Bus signals
290
 
            self.PropertyChanged(dbus.String(u"enabled"),
291
 
                                 dbus.Boolean(True, variant_level=1))
292
 
            self.PropertyChanged(dbus.String(u"last_enabled"),
293
 
                                 (_datetime_to_dbus(self.last_enabled,
294
 
                                                    variant_level=1)))
295
 
    
296
 
    def disable(self):
297
 
        """Disable this client."""
298
 
        if not getattr(self, "enabled", False):
 
253
        # Schedule a stop() when 'timeout' has passed
 
254
        self.stop_initiator_tag = gobject.timeout_add\
 
255
                                  (self._timeout_milliseconds,
 
256
                                   self.stop)
 
257
    def stop(self):
 
258
        """Stop this client.
 
259
        The possibility that a client might be restarted is left open,
 
260
        but not currently used."""
 
261
        # If this client doesn't have a secret, it is already stopped.
 
262
        if self.secret:
 
263
            logger.info(u"Stopping client %s", self.name)
 
264
            self.secret = None
 
265
        else:
299
266
            return False
300
 
        logger.info(u"Disabling client %s", self.name)
301
 
        if getattr(self, "disable_initiator_tag", False):
302
 
            gobject.source_remove(self.disable_initiator_tag)
303
 
            self.disable_initiator_tag = None
 
267
        if getattr(self, "stop_initiator_tag", False):
 
268
            gobject.source_remove(self.stop_initiator_tag)
 
269
            self.stop_initiator_tag = None
304
270
        if getattr(self, "checker_initiator_tag", False):
305
271
            gobject.source_remove(self.checker_initiator_tag)
306
272
            self.checker_initiator_tag = None
307
273
        self.stop_checker()
308
 
        if self.disable_hook:
309
 
            self.disable_hook(self)
310
 
        self.enabled = False
311
 
        if self.use_dbus:
312
 
            # Emit D-Bus signal
313
 
            self.PropertyChanged(dbus.String(u"enabled"),
314
 
                                 dbus.Boolean(False, variant_level=1))
 
274
        if self.stop_hook:
 
275
            self.stop_hook(self)
315
276
        # Do not run this again if called by a gobject.timeout_add
316
277
        return False
317
 
    
318
278
    def __del__(self):
319
 
        self.disable_hook = None
320
 
        self.disable()
321
 
    
322
 
    def checker_callback(self, pid, condition, command):
 
279
        self.stop_hook = None
 
280
        self.stop()
 
281
    def checker_callback(self, pid, condition):
323
282
        """The checker has completed, so take appropriate actions."""
 
283
        now = datetime.datetime.now()
324
284
        self.checker_callback_tag = None
325
285
        self.checker = None
326
 
        if self.use_dbus:
327
 
            # Emit D-Bus signal
328
 
            self.PropertyChanged(dbus.String(u"checker_running"),
329
 
                                 dbus.Boolean(False, variant_level=1))
330
 
        if os.WIFEXITED(condition):
331
 
            exitstatus = os.WEXITSTATUS(condition)
332
 
            if exitstatus == 0:
333
 
                logger.info(u"Checker for %(name)s succeeded",
334
 
                            vars(self))
335
 
                self.checked_ok()
336
 
            else:
337
 
                logger.info(u"Checker for %(name)s failed",
338
 
                            vars(self))
339
 
            if self.use_dbus:
340
 
                # Emit D-Bus signal
341
 
                self.CheckerCompleted(dbus.Int16(exitstatus),
342
 
                                      dbus.Int64(condition),
343
 
                                      dbus.String(command))
344
 
        else:
 
286
        if os.WIFEXITED(condition) \
 
287
               and (os.WEXITSTATUS(condition) == 0):
 
288
            logger.info(u"Checker for %(name)s succeeded",
 
289
                        vars(self))
 
290
            self.last_checked_ok = now
 
291
            gobject.source_remove(self.stop_initiator_tag)
 
292
            self.stop_initiator_tag = gobject.timeout_add\
 
293
                                      (self._timeout_milliseconds,
 
294
                                       self.stop)
 
295
        elif not os.WIFEXITED(condition):
345
296
            logger.warning(u"Checker for %(name)s crashed?",
346
297
                           vars(self))
347
 
            if self.use_dbus:
348
 
                # Emit D-Bus signal
349
 
                self.CheckerCompleted(dbus.Int16(-1),
350
 
                                      dbus.Int64(condition),
351
 
                                      dbus.String(command))
352
 
    
353
 
    def checked_ok(self):
354
 
        """Bump up the timeout for this client.
355
 
        This should only be called when the client has been seen,
356
 
        alive and well.
357
 
        """
358
 
        self.last_checked_ok = datetime.datetime.utcnow()
359
 
        gobject.source_remove(self.disable_initiator_tag)
360
 
        self.disable_initiator_tag = (gobject.timeout_add
361
 
                                      (self.timeout_milliseconds(),
362
 
                                       self.disable))
363
 
        if self.use_dbus:
364
 
            # Emit D-Bus signal
365
 
            self.PropertyChanged(
366
 
                dbus.String(u"last_checked_ok"),
367
 
                (_datetime_to_dbus(self.last_checked_ok,
368
 
                                   variant_level=1)))
369
 
    
 
298
        else:
 
299
            logger.info(u"Checker for %(name)s failed",
 
300
                        vars(self))
370
301
    def start_checker(self):
371
302
        """Start a new checker subprocess if one is not running.
372
303
        If a checker already exists, leave it running and do
381
312
        # is as it should be.
382
313
        if self.checker is None:
383
314
            try:
384
 
                # In case checker_command has exactly one % operator
385
 
                command = self.checker_command % self.host
 
315
                # In case check_command has exactly one % operator
 
316
                command = self.check_command % self.fqdn
386
317
            except TypeError:
387
318
                # Escape attributes for the shell
388
319
                escaped_attrs = dict((key, re.escape(str(val)))
389
320
                                     for key, val in
390
321
                                     vars(self).iteritems())
391
322
                try:
392
 
                    command = self.checker_command % escaped_attrs
 
323
                    command = self.check_command % escaped_attrs
393
324
                except TypeError, error:
394
325
                    logger.error(u'Could not format string "%s":'
395
 
                                 u' %s', self.checker_command, error)
 
326
                                 u' %s', self.check_command, error)
396
327
                    return True # Try again later
397
328
            try:
398
329
                logger.info(u"Starting checker %r for %s",
399
330
                            command, self.name)
400
 
                # We don't need to redirect stdout and stderr, since
401
 
                # in normal mode, that is already done by daemon(),
402
 
                # and in debug mode we don't want to.  (Stdin is
403
 
                # always replaced by /dev/null.)
404
331
                self.checker = subprocess.Popen(command,
405
332
                                                close_fds=True,
406
333
                                                shell=True, cwd="/")
407
 
                if self.use_dbus:
408
 
                    # Emit D-Bus signal
409
 
                    self.CheckerStarted(command)
410
 
                    self.PropertyChanged(
411
 
                        dbus.String("checker_running"),
412
 
                        dbus.Boolean(True, variant_level=1))
413
 
                self.checker_callback_tag = (gobject.child_watch_add
414
 
                                             (self.checker.pid,
415
 
                                              self.checker_callback,
416
 
                                              data=command))
417
 
                # The checker may have completed before the gobject
418
 
                # watch was added.  Check for this.
419
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
420
 
                if pid:
421
 
                    gobject.source_remove(self.checker_callback_tag)
422
 
                    self.checker_callback(pid, status, command)
423
 
            except OSError, error:
 
334
                self.checker_callback_tag = gobject.child_watch_add\
 
335
                                            (self.checker.pid,
 
336
                                             self.checker_callback)
 
337
            except subprocess.OSError, error:
424
338
                logger.error(u"Failed to start subprocess: %s",
425
339
                             error)
426
340
        # Re-run this periodically if run by gobject.timeout_add
427
341
        return True
428
 
    
429
342
    def stop_checker(self):
430
343
        """Force the checker process, if any, to stop."""
431
344
        if self.checker_callback_tag:
433
346
            self.checker_callback_tag = None
434
347
        if getattr(self, "checker", None) is None:
435
348
            return
436
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
349
        logger.debug("Stopping checker for %(name)s", vars(self))
437
350
        try:
438
351
            os.kill(self.checker.pid, signal.SIGTERM)
439
352
            #os.sleep(0.5)
443
356
            if error.errno != errno.ESRCH: # No such process
444
357
                raise
445
358
        self.checker = None
446
 
        if self.use_dbus:
447
 
            self.PropertyChanged(dbus.String(u"checker_running"),
448
 
                                 dbus.Boolean(False, variant_level=1))
449
 
    
450
359
    def still_valid(self):
451
360
        """Has the timeout not yet passed for this client?"""
452
 
        if not getattr(self, "enabled", False):
453
 
            return False
454
 
        now = datetime.datetime.utcnow()
 
361
        now = datetime.datetime.now()
455
362
        if self.last_checked_ok is None:
456
363
            return now < (self.created + self.timeout)
457
364
        else:
458
365
            return now < (self.last_checked_ok + self.timeout)
459
 
    
460
 
    ## D-Bus methods & signals
461
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
462
 
    
463
 
    # CheckedOK - method
464
 
    CheckedOK = dbus.service.method(_interface)(checked_ok)
465
 
    CheckedOK.__name__ = "CheckedOK"
466
 
    
467
 
    # CheckerCompleted - signal
468
 
    @dbus.service.signal(_interface, signature="nxs")
469
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
470
 
        "D-Bus signal"
471
 
        pass
472
 
    
473
 
    # CheckerStarted - signal
474
 
    @dbus.service.signal(_interface, signature="s")
475
 
    def CheckerStarted(self, command):
476
 
        "D-Bus signal"
477
 
        pass
478
 
    
479
 
    # GetAllProperties - method
480
 
    @dbus.service.method(_interface, out_signature="a{sv}")
481
 
    def GetAllProperties(self):
482
 
        "D-Bus method"
483
 
        return dbus.Dictionary({
484
 
                dbus.String("name"):
485
 
                    dbus.String(self.name, variant_level=1),
486
 
                dbus.String("fingerprint"):
487
 
                    dbus.String(self.fingerprint, variant_level=1),
488
 
                dbus.String("host"):
489
 
                    dbus.String(self.host, variant_level=1),
490
 
                dbus.String("created"):
491
 
                    _datetime_to_dbus(self.created, variant_level=1),
492
 
                dbus.String("last_enabled"):
493
 
                    (_datetime_to_dbus(self.last_enabled,
494
 
                                       variant_level=1)
495
 
                     if self.last_enabled is not None
496
 
                     else dbus.Boolean(False, variant_level=1)),
497
 
                dbus.String("enabled"):
498
 
                    dbus.Boolean(self.enabled, variant_level=1),
499
 
                dbus.String("last_checked_ok"):
500
 
                    (_datetime_to_dbus(self.last_checked_ok,
501
 
                                       variant_level=1)
502
 
                     if self.last_checked_ok is not None
503
 
                     else dbus.Boolean (False, variant_level=1)),
504
 
                dbus.String("timeout"):
505
 
                    dbus.UInt64(self.timeout_milliseconds(),
506
 
                                variant_level=1),
507
 
                dbus.String("interval"):
508
 
                    dbus.UInt64(self.interval_milliseconds(),
509
 
                                variant_level=1),
510
 
                dbus.String("checker"):
511
 
                    dbus.String(self.checker_command,
512
 
                                variant_level=1),
513
 
                dbus.String("checker_running"):
514
 
                    dbus.Boolean(self.checker is not None,
515
 
                                 variant_level=1),
516
 
                dbus.String("object_path"):
517
 
                    dbus.ObjectPath(self.dbus_object_path,
518
 
                                    variant_level=1)
519
 
                }, signature="sv")
520
 
    
521
 
    # IsStillValid - method
522
 
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
523
 
                    (still_valid))
524
 
    IsStillValid.__name__ = "IsStillValid"
525
 
    
526
 
    # PropertyChanged - signal
527
 
    @dbus.service.signal(_interface, signature="sv")
528
 
    def PropertyChanged(self, property, value):
529
 
        "D-Bus signal"
530
 
        pass
531
 
    
532
 
    # SetChecker - method
533
 
    @dbus.service.method(_interface, in_signature="s")
534
 
    def SetChecker(self, checker):
535
 
        "D-Bus setter method"
536
 
        self.checker_command = checker
537
 
        # Emit D-Bus signal
538
 
        self.PropertyChanged(dbus.String(u"checker"),
539
 
                             dbus.String(self.checker_command,
540
 
                                         variant_level=1))
541
 
    
542
 
    # SetHost - method
543
 
    @dbus.service.method(_interface, in_signature="s")
544
 
    def SetHost(self, host):
545
 
        "D-Bus setter method"
546
 
        self.host = host
547
 
        # Emit D-Bus signal
548
 
        self.PropertyChanged(dbus.String(u"host"),
549
 
                             dbus.String(self.host, variant_level=1))
550
 
    
551
 
    # SetInterval - method
552
 
    @dbus.service.method(_interface, in_signature="t")
553
 
    def SetInterval(self, milliseconds):
554
 
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
555
 
        # Emit D-Bus signal
556
 
        self.PropertyChanged(dbus.String(u"interval"),
557
 
                             (dbus.UInt64(self.interval_milliseconds(),
558
 
                                          variant_level=1)))
559
 
    
560
 
    # SetSecret - method
561
 
    @dbus.service.method(_interface, in_signature="ay",
562
 
                         byte_arrays=True)
563
 
    def SetSecret(self, secret):
564
 
        "D-Bus setter method"
565
 
        self.secret = str(secret)
566
 
    
567
 
    # SetTimeout - method
568
 
    @dbus.service.method(_interface, in_signature="t")
569
 
    def SetTimeout(self, milliseconds):
570
 
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
571
 
        # Emit D-Bus signal
572
 
        self.PropertyChanged(dbus.String(u"timeout"),
573
 
                             (dbus.UInt64(self.timeout_milliseconds(),
574
 
                                          variant_level=1)))
575
 
    
576
 
    # Enable - method
577
 
    Enable = dbus.service.method(_interface)(enable)
578
 
    Enable.__name__ = "Enable"
579
 
    
580
 
    # StartChecker - method
581
 
    @dbus.service.method(_interface)
582
 
    def StartChecker(self):
583
 
        "D-Bus method"
584
 
        self.start_checker()
585
 
    
586
 
    # Disable - method
587
 
    @dbus.service.method(_interface)
588
 
    def Disable(self):
589
 
        "D-Bus method"
590
 
        self.disable()
591
 
    
592
 
    # StopChecker - method
593
 
    StopChecker = dbus.service.method(_interface)(stop_checker)
594
 
    StopChecker.__name__ = "StopChecker"
595
 
    
596
 
    del _interface
597
366
 
598
367
 
599
368
def peer_certificate(session):
600
369
    "Return the peer's OpenPGP certificate as a bytestring"
601
370
    # If not an OpenPGP certificate...
602
 
    if (gnutls.library.functions
603
 
        .gnutls_certificate_type_get(session._c_object)
604
 
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
371
    if gnutls.library.functions.gnutls_certificate_type_get\
 
372
            (session._c_object) \
 
373
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
605
374
        # ...do the normal thing
606
375
        return session.peer_certificate
607
 
    list_size = ctypes.c_uint(1)
608
 
    cert_list = (gnutls.library.functions
609
 
                 .gnutls_certificate_get_peers
610
 
                 (session._c_object, ctypes.byref(list_size)))
611
 
    if not bool(cert_list) and list_size.value != 0:
612
 
        raise gnutls.errors.GNUTLSError("error getting peer"
613
 
                                        " certificate")
 
376
    list_size = ctypes.c_uint()
 
377
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
378
        (session._c_object, ctypes.byref(list_size))
614
379
    if list_size.value == 0:
615
380
        return None
616
381
    cert = cert_list[0]
620
385
def fingerprint(openpgp):
621
386
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
622
387
    # New GnuTLS "datum" with the OpenPGP public key
623
 
    datum = (gnutls.library.types
624
 
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
625
 
                                         ctypes.POINTER
626
 
                                         (ctypes.c_ubyte)),
627
 
                             ctypes.c_uint(len(openpgp))))
 
388
    datum = gnutls.library.types.gnutls_datum_t\
 
389
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
390
                     ctypes.POINTER(ctypes.c_ubyte)),
 
391
         ctypes.c_uint(len(openpgp)))
628
392
    # New empty GnuTLS certificate
629
393
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
630
 
    (gnutls.library.functions
631
 
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
394
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
395
        (ctypes.byref(crt))
632
396
    # Import the OpenPGP public key into the certificate
633
 
    (gnutls.library.functions
634
 
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
635
 
                                gnutls.library.constants
636
 
                                .GNUTLS_OPENPGP_FMT_RAW))
637
 
    # Verify the self signature in the key
638
 
    crtverify = ctypes.c_uint()
639
 
    (gnutls.library.functions
640
 
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
641
 
    if crtverify.value != 0:
642
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
643
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
397
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
398
                    (crt, ctypes.byref(datum),
 
399
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
644
400
    # New buffer for the fingerprint
645
 
    buf = ctypes.create_string_buffer(20)
646
 
    buf_len = ctypes.c_size_t()
 
401
    buffer = ctypes.create_string_buffer(20)
 
402
    buffer_length = ctypes.c_size_t()
647
403
    # Get the fingerprint from the certificate into the buffer
648
 
    (gnutls.library.functions
649
 
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
650
 
                                         ctypes.byref(buf_len)))
 
404
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
405
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
651
406
    # Deinit the certificate
652
407
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
653
408
    # Convert the buffer to a Python bytestring
654
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
409
    fpr = ctypes.string_at(buffer, buffer_length.value)
655
410
    # Convert the bytestring to hexadecimal notation
656
411
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
657
412
    return hex_fpr
658
413
 
659
414
 
660
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
661
416
    """A TCP request handler class.
662
417
    Instantiated by IPv6_TCPServer for each request to handle it.
663
418
    Note: This will run in its own forked process."""
664
419
    
665
420
    def handle(self):
666
421
        logger.info(u"TCP connection from: %s",
667
 
                    unicode(self.client_address))
668
 
        session = (gnutls.connection
669
 
                   .ClientSession(self.request,
670
 
                                  gnutls.connection
671
 
                                  .X509Credentials()))
 
422
                     unicode(self.client_address))
 
423
        session = gnutls.connection.ClientSession\
 
424
                  (self.request, gnutls.connection.X509Credentials())
672
425
        
673
426
        line = self.request.makefile().readline()
674
427
        logger.debug(u"Protocol version: %r", line)
685
438
        # using OpenPGP certificates.
686
439
        
687
440
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
688
 
        #                     "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
689
 
        #                     "+DHE-DSS"))
690
 
        # Use a fallback default, since this MUST be set.
691
 
        priority = self.server.settings.get("priority", "NORMAL")
692
 
        (gnutls.library.functions
693
 
         .gnutls_priority_set_direct(session._c_object,
694
 
                                     priority, None))
 
441
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
442
        #                "+DHE-DSS"))
 
443
        priority = "NORMAL"             # Fallback default, since this
 
444
                                        # MUST be set.
 
445
        if self.server.settings["priority"]:
 
446
            priority = self.server.settings["priority"]
 
447
        gnutls.library.functions.gnutls_priority_set_direct\
 
448
            (session._c_object, priority, None);
695
449
        
696
450
        try:
697
451
            session.handshake()
700
454
            # Do not run session.bye() here: the session is not
701
455
            # established.  Just abandon the request.
702
456
            return
703
 
        logger.debug(u"Handshake succeeded")
704
457
        try:
705
458
            fpr = fingerprint(peer_certificate(session))
706
459
        except (TypeError, gnutls.errors.GNUTLSError), error:
708
461
            session.bye()
709
462
            return
710
463
        logger.debug(u"Fingerprint: %s", fpr)
711
 
        
 
464
        client = None
712
465
        for c in self.server.clients:
713
466
            if c.fingerprint == fpr:
714
467
                client = c
715
468
                break
716
 
        else:
 
469
        if not client:
717
470
            logger.warning(u"Client not found for fingerprint: %s",
718
471
                           fpr)
719
472
            session.bye()
726
479
                           vars(client))
727
480
            session.bye()
728
481
            return
729
 
        ## This won't work here, since we're in a fork.
730
 
        # client.checked_ok()
731
482
        sent_size = 0
732
483
        while sent_size < len(client.secret):
733
484
            sent = session.send(client.secret[sent_size:])
738
489
        session.bye()
739
490
 
740
491
 
741
 
class IPv6_TCPServer(SocketServer.ForkingMixIn,
742
 
                     SocketServer.TCPServer, object):
743
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port.
 
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
493
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
744
494
    Attributes:
745
495
        settings:       Server settings
746
496
        clients:        Set() of Client objects
747
 
        enabled:        Boolean; whether this server is activated yet
748
497
    """
749
498
    address_family = socket.AF_INET6
750
499
    def __init__(self, *args, **kwargs):
754
503
        if "clients" in kwargs:
755
504
            self.clients = kwargs["clients"]
756
505
            del kwargs["clients"]
757
 
        if "use_ipv6" in kwargs:
758
 
            if not kwargs["use_ipv6"]:
759
 
                self.address_family = socket.AF_INET
760
 
            del kwargs["use_ipv6"]
761
 
        self.enabled = False
762
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
506
        return super(type(self), self).__init__(*args, **kwargs)
763
507
    def server_bind(self):
764
508
        """This overrides the normal server_bind() function
765
509
        to bind to an interface if one was specified, and also NOT to
777
521
                                 u" bind to interface %s",
778
522
                                 self.settings["interface"])
779
523
                else:
780
 
                    raise
 
524
                    raise error
781
525
        # Only bind(2) the socket if we really need to.
782
526
        if self.server_address[0] or self.server_address[1]:
783
527
            if not self.server_address[0]:
784
 
                if self.address_family == socket.AF_INET6:
785
 
                    any_address = "::" # in6addr_any
786
 
                else:
787
 
                    any_address = socket.INADDR_ANY
788
 
                self.server_address = (any_address,
 
528
                in6addr_any = "::"
 
529
                self.server_address = (in6addr_any,
789
530
                                       self.server_address[1])
790
 
            elif not self.server_address[1]:
 
531
            elif self.server_address[1] is None:
791
532
                self.server_address = (self.server_address[0],
792
533
                                       0)
793
 
#                 if self.settings["interface"]:
794
 
#                     self.server_address = (self.server_address[0],
795
 
#                                            0, # port
796
 
#                                            0, # flowinfo
797
 
#                                            if_nametoindex
798
 
#                                            (self.settings
799
 
#                                             ["interface"]))
800
 
            return super(IPv6_TCPServer, self).server_bind()
801
 
    def server_activate(self):
802
 
        if self.enabled:
803
 
            return super(IPv6_TCPServer, self).server_activate()
804
 
    def enable(self):
805
 
        self.enabled = True
 
534
            return super(type(self), self).server_bind()
806
535
 
807
536
 
808
537
def string_to_delta(interval):
809
538
    """Parse a string and return a datetime.timedelta
810
 
    
 
539
 
811
540
    >>> string_to_delta('7d')
812
541
    datetime.timedelta(7)
813
542
    >>> string_to_delta('60s')
818
547
    datetime.timedelta(1)
819
548
    >>> string_to_delta(u'1w')
820
549
    datetime.timedelta(7)
821
 
    >>> string_to_delta('5m 30s')
822
 
    datetime.timedelta(0, 330)
823
550
    """
824
 
    timevalue = datetime.timedelta(0)
825
 
    for s in interval.split():
826
 
        try:
827
 
            suffix = unicode(s[-1])
828
 
            value = int(s[:-1])
829
 
            if suffix == u"d":
830
 
                delta = datetime.timedelta(value)
831
 
            elif suffix == u"s":
832
 
                delta = datetime.timedelta(0, value)
833
 
            elif suffix == u"m":
834
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
835
 
            elif suffix == u"h":
836
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
837
 
            elif suffix == u"w":
838
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
839
 
            else:
840
 
                raise ValueError
841
 
        except (ValueError, IndexError):
 
551
    try:
 
552
        suffix=unicode(interval[-1])
 
553
        value=int(interval[:-1])
 
554
        if suffix == u"d":
 
555
            delta = datetime.timedelta(value)
 
556
        elif suffix == u"s":
 
557
            delta = datetime.timedelta(0, value)
 
558
        elif suffix == u"m":
 
559
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
560
        elif suffix == u"h":
 
561
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
562
        elif suffix == u"w":
 
563
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
564
        else:
842
565
            raise ValueError
843
 
        timevalue += delta
844
 
    return timevalue
 
566
    except (ValueError, IndexError):
 
567
        raise ValueError
 
568
    return delta
845
569
 
846
570
 
847
571
def server_state_changed(state):
848
572
    """Derived from the Avahi example code"""
849
573
    if state == avahi.SERVER_COLLISION:
850
 
        logger.error(u"Zeroconf server name collision")
 
574
        logger.error(u"Server name collision")
851
575
        service.remove()
852
576
    elif state == avahi.SERVER_RUNNING:
853
577
        service.add()
855
579
 
856
580
def entry_group_state_changed(state, error):
857
581
    """Derived from the Avahi example code"""
858
 
    logger.debug(u"Avahi state change: %i", state)
 
582
    logger.debug(u"state change: %i", state)
859
583
    
860
584
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
861
 
        logger.debug(u"Zeroconf service established.")
 
585
        logger.debug(u"Service established.")
862
586
    elif state == avahi.ENTRY_GROUP_COLLISION:
863
 
        logger.warning(u"Zeroconf service name collision.")
 
587
        logger.warning(u"Service name collision.")
864
588
        service.rename()
865
589
    elif state == avahi.ENTRY_GROUP_FAILURE:
866
 
        logger.critical(u"Avahi: Error in group state changed %s",
 
590
        logger.critical(u"Error in group state changed %s",
867
591
                        unicode(error))
868
 
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
592
        raise AvahiGroupError("State changed: %s", str(error))
869
593
 
870
594
def if_nametoindex(interface):
871
595
    """Call the C function if_nametoindex(), or equivalent"""
872
596
    global if_nametoindex
873
597
    try:
874
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
875
 
                          (ctypes.util.find_library("c"))
876
 
                          .if_nametoindex)
 
598
        if "ctypes.util" not in sys.modules:
 
599
            import ctypes.util
 
600
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
601
            (ctypes.util.find_library("c")).if_nametoindex
877
602
    except (OSError, AttributeError):
878
603
        if "struct" not in sys.modules:
879
604
            import struct
882
607
        def if_nametoindex(interface):
883
608
            "Get an interface index the hard way, i.e. using fcntl()"
884
609
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
885
 
            with closing(socket.socket()) as s:
886
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
887
 
                                    struct.pack("16s16x", interface))
 
610
            s = socket.socket()
 
611
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
612
                                struct.pack("16s16x", interface))
 
613
            s.close()
888
614
            interface_index = struct.unpack("I", ifreq[16:20])[0]
889
615
            return interface_index
890
616
    return if_nametoindex(interface)
914
640
 
915
641
 
916
642
def main():
917
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
643
    global main_loop_started
 
644
    main_loop_started = False
 
645
    
 
646
    parser = OptionParser()
918
647
    parser.add_option("-i", "--interface", type="string",
919
648
                      metavar="IF", help="Bind to interface IF")
920
649
    parser.add_option("-a", "--address", type="string",
921
650
                      help="Address to listen for requests on")
922
651
    parser.add_option("-p", "--port", type="int",
923
652
                      help="Port number to receive requests on")
924
 
    parser.add_option("--check", action="store_true",
 
653
    parser.add_option("--check", action="store_true", default=False,
925
654
                      help="Run self-test")
926
 
    parser.add_option("--debug", action="store_true",
 
655
    parser.add_option("--debug", action="store_true", default=False,
927
656
                      help="Debug mode; run in foreground and log to"
928
657
                      " terminal")
929
658
    parser.add_option("--priority", type="string", help="GnuTLS"
934
663
                      default="/etc/mandos", metavar="DIR",
935
664
                      help="Directory to search for configuration"
936
665
                      " files")
937
 
    parser.add_option("--no-dbus", action="store_false",
938
 
                      dest="use_dbus",
939
 
                      help="Do not provide D-Bus system bus"
940
 
                      " interface")
941
 
    parser.add_option("--no-ipv6", action="store_false",
942
 
                      dest="use_ipv6", help="Do not use IPv6")
943
 
    options = parser.parse_args()[0]
 
666
    (options, args) = parser.parse_args()
944
667
    
945
668
    if options.check:
946
669
        import doctest
955
678
                        "priority":
956
679
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
957
680
                        "servicename": "Mandos",
958
 
                        "use_dbus": "True",
959
 
                        "use_ipv6": "True",
960
681
                        }
961
682
    
962
683
    # Parse config file for server-global settings
963
684
    server_config = ConfigParser.SafeConfigParser(server_defaults)
964
685
    del server_defaults
965
686
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
687
    server_section = "server"
966
688
    # Convert the SafeConfigParser object to a dict
967
 
    server_settings = server_config.defaults()
968
 
    # Use the appropriate methods on the non-string config options
969
 
    server_settings["debug"] = server_config.getboolean("DEFAULT",
970
 
                                                        "debug")
971
 
    server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
972
 
                                                           "use_dbus")
973
 
    server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
974
 
                                                           "use_ipv6")
975
 
    if server_settings["port"]:
976
 
        server_settings["port"] = server_config.getint("DEFAULT",
977
 
                                                       "port")
 
689
    server_settings = dict(server_config.items(server_section))
 
690
    # Use getboolean on the boolean config option
 
691
    server_settings["debug"] = server_config.getboolean\
 
692
                               (server_section, "debug")
978
693
    del server_config
979
694
    
980
695
    # Override the settings from the config file with command line
981
696
    # options, if set.
982
697
    for option in ("interface", "address", "port", "debug",
983
 
                   "priority", "servicename", "configdir",
984
 
                   "use_dbus", "use_ipv6"):
 
698
                   "priority", "servicename", "configdir"):
985
699
        value = getattr(options, option)
986
700
        if value is not None:
987
701
            server_settings[option] = value
988
702
    del options
989
703
    # Now we have our good server settings in "server_settings"
990
704
    
991
 
    # For convenience
992
 
    debug = server_settings["debug"]
993
 
    use_dbus = server_settings["use_dbus"]
994
 
    use_ipv6 = server_settings["use_ipv6"]
995
 
    
996
 
    if not debug:
997
 
        syslogger.setLevel(logging.WARNING)
998
 
        console.setLevel(logging.WARNING)
999
 
    
1000
 
    if server_settings["servicename"] != "Mandos":
1001
 
        syslogger.setFormatter(logging.Formatter
1002
 
                               ('Mandos (%s): %%(levelname)s:'
1003
 
                                ' %%(message)s'
1004
 
                                % server_settings["servicename"]))
1005
 
    
1006
705
    # Parse config file with clients
1007
706
    client_defaults = { "timeout": "1h",
1008
707
                        "interval": "5m",
1009
 
                        "checker": "fping -q -- %%(host)s",
1010
 
                        "host": "",
 
708
                        "checker": "fping -q -- %%(fqdn)s",
1011
709
                        }
1012
710
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1013
711
    client_config.read(os.path.join(server_settings["configdir"],
1014
712
                                    "clients.conf"))
1015
713
    
1016
 
    clients = Set()
1017
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
1018
 
                                 server_settings["port"]),
1019
 
                                TCP_handler,
1020
 
                                settings=server_settings,
1021
 
                                clients=clients, use_ipv6=use_ipv6)
1022
 
    pidfilename = "/var/run/mandos.pid"
1023
 
    try:
1024
 
        pidfile = open(pidfilename, "w")
1025
 
    except IOError:
1026
 
        logger.error("Could not open file %r", pidfilename)
1027
 
    
1028
 
    try:
1029
 
        uid = pwd.getpwnam("_mandos").pw_uid
1030
 
        gid = pwd.getpwnam("_mandos").pw_gid
1031
 
    except KeyError:
1032
 
        try:
1033
 
            uid = pwd.getpwnam("mandos").pw_uid
1034
 
            gid = pwd.getpwnam("mandos").pw_gid
1035
 
        except KeyError:
1036
 
            try:
1037
 
                uid = pwd.getpwnam("nobody").pw_uid
1038
 
                gid = pwd.getpwnam("nogroup").pw_gid
1039
 
            except KeyError:
1040
 
                uid = 65534
1041
 
                gid = 65534
1042
 
    try:
1043
 
        os.setgid(gid)
1044
 
        os.setuid(uid)
1045
 
    except OSError, error:
1046
 
        if error[0] != errno.EPERM:
1047
 
            raise error
1048
 
    
1049
 
    # Enable all possible GnuTLS debugging
1050
 
    if debug:
1051
 
        # "Use a log level over 10 to enable all debugging options."
1052
 
        # - GnuTLS manual
1053
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1054
 
        
1055
 
        @gnutls.library.types.gnutls_log_func
1056
 
        def debug_gnutls(level, string):
1057
 
            logger.debug("GnuTLS: %s", string[:-1])
1058
 
        
1059
 
        (gnutls.library.functions
1060
 
         .gnutls_global_set_log_function(debug_gnutls))
1061
 
    
1062
714
    global service
1063
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1064
715
    service = AvahiService(name = server_settings["servicename"],
1065
 
                           servicetype = "_mandos._tcp",
1066
 
                           protocol = protocol)
 
716
                           type = "_mandos._tcp", );
1067
717
    if server_settings["interface"]:
1068
 
        service.interface = (if_nametoindex
1069
 
                             (server_settings["interface"]))
 
718
        service.interface = if_nametoindex(server_settings["interface"])
1070
719
    
1071
720
    global main_loop
1072
721
    global bus
1075
724
    DBusGMainLoop(set_as_default=True )
1076
725
    main_loop = gobject.MainLoop()
1077
726
    bus = dbus.SystemBus()
1078
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1079
 
                                           avahi.DBUS_PATH_SERVER),
1080
 
                            avahi.DBUS_INTERFACE_SERVER)
 
727
    server = dbus.Interface(
 
728
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
729
            avahi.DBUS_INTERFACE_SERVER )
1081
730
    # End of Avahi example code
1082
 
    if use_dbus:
1083
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
 
731
    
 
732
    debug = server_settings["debug"]
 
733
    
 
734
    if debug:
 
735
        console = logging.StreamHandler()
 
736
        # console.setLevel(logging.DEBUG)
 
737
        console.setFormatter(logging.Formatter\
 
738
                             ('%(levelname)s: %(message)s'))
 
739
        logger.addHandler(console)
 
740
        del console
 
741
    
 
742
    clients = Set()
 
743
    def remove_from_clients(client):
 
744
        clients.remove(client)
 
745
        if not clients:
 
746
            logger.critical(u"No clients left, exiting")
 
747
            sys.exit()
1084
748
    
1085
749
    clients.update(Set(Client(name = section,
 
750
                              stop_hook = remove_from_clients,
1086
751
                              config
1087
 
                              = dict(client_config.items(section)),
1088
 
                              use_dbus = use_dbus)
 
752
                              = dict(client_config.items(section)))
1089
753
                       for section in client_config.sections()))
1090
 
    if not clients:
1091
 
        logger.warning(u"No clients defined")
1092
754
    
1093
 
    if debug:
1094
 
        # Redirect stdin so all checkers get /dev/null
1095
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1096
 
        os.dup2(null, sys.stdin.fileno())
1097
 
        if null > 2:
1098
 
            os.close(null)
1099
 
    else:
1100
 
        # No console logging
1101
 
        logger.removeHandler(console)
1102
 
        # Close all input and output, do double fork, etc.
 
755
    if not debug:
1103
756
        daemon()
1104
757
    
1105
 
    try:
1106
 
        pid = os.getpid()
1107
 
        pidfile.write(str(pid) + "\n")
1108
 
        pidfile.close()
1109
 
        del pidfile
1110
 
    except IOError:
1111
 
        logger.error(u"Could not write to file %r with PID %d",
1112
 
                     pidfilename, pid)
1113
 
    except NameError:
1114
 
        # "pidfile" was never created
1115
 
        pass
1116
 
    del pidfilename
1117
 
    
1118
758
    def cleanup():
1119
759
        "Cleanup function; run on exit"
1120
760
        global group
1126
766
        
1127
767
        while clients:
1128
768
            client = clients.pop()
1129
 
            client.disable_hook = None
1130
 
            client.disable()
 
769
            client.stop_hook = None
 
770
            client.stop()
1131
771
    
1132
772
    atexit.register(cleanup)
1133
773
    
1136
776
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1137
777
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1138
778
    
1139
 
    if use_dbus:
1140
 
        class MandosServer(dbus.service.Object):
1141
 
            """A D-Bus proxy object"""
1142
 
            def __init__(self):
1143
 
                dbus.service.Object.__init__(self, bus, "/")
1144
 
            _interface = u"se.bsnet.fukt.Mandos"
1145
 
            
1146
 
            @dbus.service.signal(_interface, signature="oa{sv}")
1147
 
            def ClientAdded(self, objpath, properties):
1148
 
                "D-Bus signal"
1149
 
                pass
1150
 
            
1151
 
            @dbus.service.signal(_interface, signature="os")
1152
 
            def ClientRemoved(self, objpath, name):
1153
 
                "D-Bus signal"
1154
 
                pass
1155
 
            
1156
 
            @dbus.service.method(_interface, out_signature="ao")
1157
 
            def GetAllClients(self):
1158
 
                "D-Bus method"
1159
 
                return dbus.Array(c.dbus_object_path for c in clients)
1160
 
            
1161
 
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
1162
 
            def GetAllClientsWithProperties(self):
1163
 
                "D-Bus method"
1164
 
                return dbus.Dictionary(
1165
 
                    ((c.dbus_object_path, c.GetAllProperties())
1166
 
                     for c in clients),
1167
 
                    signature="oa{sv}")
1168
 
            
1169
 
            @dbus.service.method(_interface, in_signature="o")
1170
 
            def RemoveClient(self, object_path):
1171
 
                "D-Bus method"
1172
 
                for c in clients:
1173
 
                    if c.dbus_object_path == object_path:
1174
 
                        clients.remove(c)
1175
 
                        # Don't signal anything except ClientRemoved
1176
 
                        c.use_dbus = False
1177
 
                        c.disable()
1178
 
                        # Emit D-Bus signal
1179
 
                        self.ClientRemoved(object_path, c.name)
1180
 
                        return
1181
 
                raise KeyError
1182
 
            
1183
 
            del _interface
1184
 
        
1185
 
        mandos_server = MandosServer()
1186
 
    
1187
779
    for client in clients:
1188
 
        if use_dbus:
1189
 
            # Emit D-Bus signal
1190
 
            mandos_server.ClientAdded(client.dbus_object_path,
1191
 
                                      client.GetAllProperties())
1192
 
        client.enable()
1193
 
    
1194
 
    tcp_server.enable()
1195
 
    tcp_server.server_activate()
1196
 
    
 
780
        client.start()
 
781
    
 
782
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
783
                                 server_settings["port"]),
 
784
                                tcp_handler,
 
785
                                settings=server_settings,
 
786
                                clients=clients)
1197
787
    # Find out what port we got
1198
788
    service.port = tcp_server.socket.getsockname()[1]
1199
 
    if use_ipv6:
1200
 
        logger.info(u"Now listening on address %r, port %d,"
1201
 
                    " flowinfo %d, scope_id %d"
1202
 
                    % tcp_server.socket.getsockname())
1203
 
    else:                       # IPv4
1204
 
        logger.info(u"Now listening on address %r, port %d"
1205
 
                    % tcp_server.socket.getsockname())
 
789
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
790
                u" scope_id %d" % tcp_server.socket.getsockname())
1206
791
    
1207
792
    #service.interface = tcp_server.socket.getsockname()[3]
1208
793
    
1218
803
        
1219
804
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1220
805
                             lambda *args, **kwargs:
1221
 
                             (tcp_server.handle_request
1222
 
                              (*args[2:], **kwargs) or True))
 
806
                             tcp_server.handle_request\
 
807
                             (*args[2:], **kwargs) or True)
1223
808
        
1224
 
        logger.debug(u"Starting main loop")
 
809
        logger.debug("Starting main loop")
 
810
        main_loop_started = True
1225
811
        main_loop.run()
1226
812
    except AvahiError, error:
1227
 
        logger.critical(u"AvahiError: %s", error)
 
813
        logger.critical(u"AvahiError: %s" + unicode(error))
1228
814
        sys.exit(1)
1229
815
    except KeyboardInterrupt:
1230
816
        if debug:
1231
 
            print >> sys.stderr
1232
 
        logger.debug("Server received KeyboardInterrupt")
1233
 
    logger.debug("Server exiting")
 
817
            print
1234
818
 
1235
819
if __name__ == '__main__':
1236
820
    main()