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  • Committer: Teddy Hogeborn
  • Date: 2009-02-13 05:38:21 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090213053821-03e696gckk4nbjps
Support not using IPv6 in server:

* mandos (AvahiService.__init__): Take new "protocol" parameter.  All
                                  callers changed.
  (IPv6_TCPServer.__init__): Take new "use_ipv6" parameter.  All
                             callers changed.
  (IPv6_TCPServer.server_bind): Create IPv4 socket if not using IPv6.
  (main): New "--no-ipv6" command line option.  New "use_ipv6" config
          option.
* mandos-options.xml ([@id="address"]): Document conditional IPv4
                                        address support.
  ([@id="ipv6"]): New paragraph.
* mandos.conf (use_ipv6): New config option.
* mandos.conf.xml (OPTIONS): Document new "use_dbus" option.
  (EXAMPLE): Changed to use IPv6 link-local address.  Added "use_ipv6"
             option.
* mandos.xml (SYNOPSIS): New "--no-ipv6" option.
  (OPTIONS): Document new "--no-ipv6" option.

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Lines of Context:
mandos
11
11
# and some lines in "main".
12
12
# 
13
13
# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
# 
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
#     GNU General Public License for more details.
25
26
# 
26
27
# You should have received a copy of the GNU General Public License
27
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
28
30
# 
29
31
# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
# 
31
33
 
32
 
from __future__ import division
 
34
from __future__ import division, with_statement, absolute_import
33
35
 
34
36
import SocketServer
35
37
import socket
36
 
import select
37
 
from optparse import OptionParser
 
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
54
55
import stat
55
56
import logging
56
57
import logging.handlers
 
58
import pwd
 
59
from contextlib import closing
57
60
 
58
61
import dbus
 
62
import dbus.service
59
63
import gobject
60
64
import avahi
61
65
from dbus.mainloop.glib import DBusGMainLoop
62
66
import ctypes
 
67
import ctypes.util
63
68
 
 
69
version = "1.0.5"
64
70
 
65
71
logger = logging.Logger('mandos')
66
 
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
 
syslogger.setFormatter(logging.Formatter\
69
 
                        ('%(levelname)s: %(message)s'))
 
72
syslogger = (logging.handlers.SysLogHandler
 
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos [%(process)d]: %(levelname)s:'
 
77
                        ' %(message)s'))
70
78
logger.addHandler(syslogger)
71
 
del syslogger
72
79
 
 
80
console = logging.StreamHandler()
 
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
 
82
                                       ' %(levelname)s: %(message)s'))
 
83
logger.addHandler(console)
73
84
 
74
85
class AvahiError(Exception):
75
 
    def __init__(self, value):
 
86
    def __init__(self, value, *args, **kwargs):
76
87
        self.value = value
77
 
    def __str__(self):
78
 
        return repr(self.value)
 
88
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
89
    def __unicode__(self):
 
90
        return unicode(repr(self.value))
79
91
 
80
92
class AvahiServiceError(AvahiError):
81
93
    pass
101
113
                  a sensible number of times
102
114
    """
103
115
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
 
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 12):
 
116
                 servicetype = None, port = None, TXT = None,
 
117
                 domain = "", host = "", max_renames = 32768,
 
118
                 protocol = avahi.PROTO_UNSPEC):
106
119
        self.interface = interface
107
120
        self.name = name
108
 
        self.type = type
 
121
        self.type = servicetype
109
122
        self.port = port
110
 
        if TXT is None:
111
 
            self.TXT = []
112
 
        else:
113
 
            self.TXT = TXT
 
123
        self.TXT = TXT if TXT is not None else []
114
124
        self.domain = domain
115
125
        self.host = host
116
126
        self.rename_count = 0
 
127
        self.max_renames = max_renames
 
128
        self.protocol = protocol
117
129
    def rename(self):
118
130
        """Derived from the Avahi example code"""
119
131
        if self.rename_count >= self.max_renames:
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)
 
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))
125
142
        self.remove()
126
143
        self.add()
127
144
        self.rename_count += 1
133
150
        """Derived from the Avahi example code"""
134
151
        global group
135
152
        if group is None:
136
 
            group = dbus.Interface\
137
 
                    (bus.get_object(avahi.DBUS_NAME,
 
153
            group = dbus.Interface(bus.get_object
 
154
                                   (avahi.DBUS_NAME,
138
155
                                    server.EntryGroupNew()),
139
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
156
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
157
            group.connect_to_signal('StateChanged',
141
158
                                    entry_group_state_changed)
142
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
159
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
143
160
                     service.name, service.type)
144
161
        group.AddService(
145
162
                self.interface,         # interface
146
 
                avahi.PROTO_INET6,      # protocol
 
163
                self.protocol,          # protocol
147
164
                dbus.UInt32(0),         # flags
148
165
                self.name, self.type,
149
166
                self.domain, self.host,
156
173
# End of Avahi example code
157
174
 
158
175
 
159
 
class Client(object):
 
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):
160
182
    """A representation of a client host served by this server.
161
183
    Attributes:
162
 
    name:      string; from the config file, used in log messages
 
184
    name:       string; from the config file, used in log messages and
 
185
                        D-Bus identifiers
163
186
    fingerprint: string (40 or 32 hexadecimal digits); used to
164
187
                 uniquely identify the client
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.
 
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.
176
201
    checker_initiator_tag: a gobject event source tag, or None
177
 
    stop_initiator_tag:    - '' -
 
202
    disable_initiator_tag:    - '' -
178
203
    checker_callback_tag:  - '' -
179
204
    checker_command: string; External command which is run to check if
180
205
                     client lives.  %() expansions are done at
181
206
                     runtime with vars(self) as dict, so that for
182
207
                     instance %(name)s can be used in the command.
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: - '' -
 
208
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
209
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
188
210
    """
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={}):
 
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):
213
225
        """Note: the 'checker' key in 'config' sets the
214
226
        'checker_command' attribute and *not* the 'checker'
215
227
        attribute."""
216
228
        self.name = name
 
229
        if config is None:
 
230
            config = {}
217
231
        logger.debug(u"Creating client %r", self.name)
 
232
        self.use_dbus = False   # During __init__
218
233
        # Uppercase and remove spaces from fingerprint for later
219
234
        # comparison purposes with return value from the fingerprint()
220
235
        # function
221
 
        self.fingerprint = config["fingerprint"].upper()\
222
 
                           .replace(u" ", u"")
 
236
        self.fingerprint = (config["fingerprint"].upper()
 
237
                            .replace(u" ", u""))
223
238
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
224
239
        if "secret" in config:
225
240
            self.secret = config["secret"].decode(u"base64")
226
241
        elif "secfile" in config:
227
 
            sf = open(config["secfile"])
228
 
            self.secret = sf.read()
229
 
            sf.close()
 
242
            with closing(open(os.path.expanduser
 
243
                              (os.path.expandvars
 
244
                               (config["secfile"])))) as secfile:
 
245
                self.secret = secfile.read()
230
246
        else:
231
247
            raise TypeError(u"No secret or secfile for client %s"
232
248
                            % self.name)
233
 
        self.fqdn = config.get("fqdn", "")
234
 
        self.created = datetime.datetime.now()
 
249
        self.host = config.get("host", "")
 
250
        self.created = datetime.datetime.utcnow()
 
251
        self.enabled = False
 
252
        self.last_enabled = None
235
253
        self.last_checked_ok = None
236
254
        self.timeout = string_to_delta(config["timeout"])
237
255
        self.interval = string_to_delta(config["interval"])
238
 
        self.stop_hook = stop_hook
 
256
        self.disable_hook = disable_hook
239
257
        self.checker = None
240
258
        self.checker_initiator_tag = None
241
 
        self.stop_initiator_tag = None
 
259
        self.disable_initiator_tag = None
242
260
        self.checker_callback_tag = None
243
 
        self.check_command = config["checker"]
244
 
    def start(self):
 
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):
245
274
        """Start this client's checker and timeout hooks"""
 
275
        self.last_enabled = datetime.datetime.utcnow()
246
276
        # Schedule a new checker to be started an 'interval' from now,
247
277
        # and every interval from then on.
248
 
        self.checker_initiator_tag = gobject.timeout_add\
249
 
                                     (self._interval_milliseconds,
250
 
                                      self.start_checker)
 
278
        self.checker_initiator_tag = (gobject.timeout_add
 
279
                                      (self.interval_milliseconds(),
 
280
                                       self.start_checker))
251
281
        # Also start a new checker *right now*.
252
282
        self.start_checker()
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:
 
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):
266
299
            return False
267
 
        if getattr(self, "stop_initiator_tag", False):
268
 
            gobject.source_remove(self.stop_initiator_tag)
269
 
            self.stop_initiator_tag = None
 
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
270
304
        if getattr(self, "checker_initiator_tag", False):
271
305
            gobject.source_remove(self.checker_initiator_tag)
272
306
            self.checker_initiator_tag = None
273
307
        self.stop_checker()
274
 
        if self.stop_hook:
275
 
            self.stop_hook(self)
 
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))
276
315
        # Do not run this again if called by a gobject.timeout_add
277
316
        return False
 
317
    
278
318
    def __del__(self):
279
 
        self.stop_hook = None
280
 
        self.stop()
281
 
    def checker_callback(self, pid, condition):
 
319
        self.disable_hook = None
 
320
        self.disable()
 
321
    
 
322
    def checker_callback(self, pid, condition, command):
282
323
        """The checker has completed, so take appropriate actions."""
283
 
        now = datetime.datetime.now()
284
324
        self.checker_callback_tag = None
285
325
        self.checker = None
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):
 
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:
296
345
            logger.warning(u"Checker for %(name)s crashed?",
297
346
                           vars(self))
298
 
        else:
299
 
            logger.info(u"Checker for %(name)s failed",
300
 
                        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
    
301
370
    def start_checker(self):
302
371
        """Start a new checker subprocess if one is not running.
303
372
        If a checker already exists, leave it running and do
312
381
        # is as it should be.
313
382
        if self.checker is None:
314
383
            try:
315
 
                # In case check_command has exactly one % operator
316
 
                command = self.check_command % self.fqdn
 
384
                # In case checker_command has exactly one % operator
 
385
                command = self.checker_command % self.host
317
386
            except TypeError:
318
387
                # Escape attributes for the shell
319
388
                escaped_attrs = dict((key, re.escape(str(val)))
320
389
                                     for key, val in
321
390
                                     vars(self).iteritems())
322
391
                try:
323
 
                    command = self.check_command % escaped_attrs
 
392
                    command = self.checker_command % escaped_attrs
324
393
                except TypeError, error:
325
394
                    logger.error(u'Could not format string "%s":'
326
 
                                 u' %s', self.check_command, error)
 
395
                                 u' %s', self.checker_command, error)
327
396
                    return True # Try again later
328
397
            try:
329
398
                logger.info(u"Starting checker %r for %s",
330
399
                            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.)
331
404
                self.checker = subprocess.Popen(command,
332
405
                                                close_fds=True,
333
406
                                                shell=True, cwd="/")
334
 
                self.checker_callback_tag = gobject.child_watch_add\
335
 
                                            (self.checker.pid,
336
 
                                             self.checker_callback)
337
 
            except subprocess.OSError, error:
 
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:
338
424
                logger.error(u"Failed to start subprocess: %s",
339
425
                             error)
340
426
        # Re-run this periodically if run by gobject.timeout_add
341
427
        return True
 
428
    
342
429
    def stop_checker(self):
343
430
        """Force the checker process, if any, to stop."""
344
431
        if self.checker_callback_tag:
346
433
            self.checker_callback_tag = None
347
434
        if getattr(self, "checker", None) is None:
348
435
            return
349
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
436
        logger.debug(u"Stopping checker for %(name)s", vars(self))
350
437
        try:
351
438
            os.kill(self.checker.pid, signal.SIGTERM)
352
439
            #os.sleep(0.5)
356
443
            if error.errno != errno.ESRCH: # No such process
357
444
                raise
358
445
        self.checker = None
 
446
        if self.use_dbus:
 
447
            self.PropertyChanged(dbus.String(u"checker_running"),
 
448
                                 dbus.Boolean(False, variant_level=1))
 
449
    
359
450
    def still_valid(self):
360
451
        """Has the timeout not yet passed for this client?"""
361
 
        now = datetime.datetime.now()
 
452
        if not getattr(self, "enabled", False):
 
453
            return False
 
454
        now = datetime.datetime.utcnow()
362
455
        if self.last_checked_ok is None:
363
456
            return now < (self.created + self.timeout)
364
457
        else:
365
458
            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
366
597
 
367
598
 
368
599
def peer_certificate(session):
369
600
    "Return the peer's OpenPGP certificate as a bytestring"
370
601
    # If not an OpenPGP certificate...
371
 
    if gnutls.library.functions.gnutls_certificate_type_get\
372
 
            (session._c_object) \
373
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
602
    if (gnutls.library.functions
 
603
        .gnutls_certificate_type_get(session._c_object)
 
604
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
374
605
        # ...do the normal thing
375
606
        return session.peer_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))
 
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")
379
614
    if list_size.value == 0:
380
615
        return None
381
616
    cert = cert_list[0]
385
620
def fingerprint(openpgp):
386
621
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
622
    # New GnuTLS "datum" with the OpenPGP public key
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)))
 
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))))
392
628
    # New empty GnuTLS certificate
393
629
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
395
 
        (ctypes.byref(crt))
 
630
    (gnutls.library.functions
 
631
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
396
632
    # Import the OpenPGP public key into the certificate
397
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
398
 
                    (crt, ctypes.byref(datum),
399
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
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")
400
644
    # New buffer for the fingerprint
401
 
    buffer = ctypes.create_string_buffer(20)
402
 
    buffer_length = ctypes.c_size_t()
 
645
    buf = ctypes.create_string_buffer(20)
 
646
    buf_len = ctypes.c_size_t()
403
647
    # Get the fingerprint from the certificate into the buffer
404
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
648
    (gnutls.library.functions
 
649
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
650
                                         ctypes.byref(buf_len)))
406
651
    # Deinit the certificate
407
652
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
653
    # Convert the buffer to a Python bytestring
409
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
654
    fpr = ctypes.string_at(buf, buf_len.value)
410
655
    # Convert the bytestring to hexadecimal notation
411
656
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
657
    return hex_fpr
413
658
 
414
659
 
415
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
660
class TCP_handler(SocketServer.BaseRequestHandler, object):
416
661
    """A TCP request handler class.
417
662
    Instantiated by IPv6_TCPServer for each request to handle it.
418
663
    Note: This will run in its own forked process."""
419
664
    
420
665
    def handle(self):
421
666
        logger.info(u"TCP connection from: %s",
422
 
                     unicode(self.client_address))
423
 
        session = gnutls.connection.ClientSession\
424
 
                  (self.request, gnutls.connection.X509Credentials())
 
667
                    unicode(self.client_address))
 
668
        session = (gnutls.connection
 
669
                   .ClientSession(self.request,
 
670
                                  gnutls.connection
 
671
                                  .X509Credentials()))
425
672
        
426
673
        line = self.request.makefile().readline()
427
674
        logger.debug(u"Protocol version: %r", line)
438
685
        # using OpenPGP certificates.
439
686
        
440
687
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
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);
 
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))
449
695
        
450
696
        try:
451
697
            session.handshake()
454
700
            # Do not run session.bye() here: the session is not
455
701
            # established.  Just abandon the request.
456
702
            return
 
703
        logger.debug(u"Handshake succeeded")
457
704
        try:
458
705
            fpr = fingerprint(peer_certificate(session))
459
706
        except (TypeError, gnutls.errors.GNUTLSError), error:
461
708
            session.bye()
462
709
            return
463
710
        logger.debug(u"Fingerprint: %s", fpr)
464
 
        client = None
 
711
        
465
712
        for c in self.server.clients:
466
713
            if c.fingerprint == fpr:
467
714
                client = c
468
715
                break
469
 
        if not client:
 
716
        else:
470
717
            logger.warning(u"Client not found for fingerprint: %s",
471
718
                           fpr)
472
719
            session.bye()
479
726
                           vars(client))
480
727
            session.bye()
481
728
            return
 
729
        ## This won't work here, since we're in a fork.
 
730
        # client.checked_ok()
482
731
        sent_size = 0
483
732
        while sent_size < len(client.secret):
484
733
            sent = session.send(client.secret[sent_size:])
489
738
        session.bye()
490
739
 
491
740
 
492
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
741
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
742
                     SocketServer.TCPServer, object):
 
743
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port.
494
744
    Attributes:
495
745
        settings:       Server settings
496
746
        clients:        Set() of Client objects
 
747
        enabled:        Boolean; whether this server is activated yet
497
748
    """
498
749
    address_family = socket.AF_INET6
499
750
    def __init__(self, *args, **kwargs):
503
754
        if "clients" in kwargs:
504
755
            self.clients = kwargs["clients"]
505
756
            del kwargs["clients"]
506
 
        return super(type(self), self).__init__(*args, **kwargs)
 
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)
507
763
    def server_bind(self):
508
764
        """This overrides the normal server_bind() function
509
765
        to bind to an interface if one was specified, and also NOT to
521
777
                                 u" bind to interface %s",
522
778
                                 self.settings["interface"])
523
779
                else:
524
 
                    raise error
 
780
                    raise
525
781
        # Only bind(2) the socket if we really need to.
526
782
        if self.server_address[0] or self.server_address[1]:
527
783
            if not self.server_address[0]:
528
 
                in6addr_any = "::"
529
 
                self.server_address = (in6addr_any,
 
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,
530
789
                                       self.server_address[1])
531
790
            elif not self.server_address[1]:
532
791
                self.server_address = (self.server_address[0],
538
797
#                                            if_nametoindex
539
798
#                                            (self.settings
540
799
#                                             ["interface"]))
541
 
            return super(type(self), self).server_bind()
 
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
542
806
 
543
807
 
544
808
def string_to_delta(interval):
545
809
    """Parse a string and return a datetime.timedelta
546
 
 
 
810
    
547
811
    >>> string_to_delta('7d')
548
812
    datetime.timedelta(7)
549
813
    >>> string_to_delta('60s')
554
818
    datetime.timedelta(1)
555
819
    >>> string_to_delta(u'1w')
556
820
    datetime.timedelta(7)
 
821
    >>> string_to_delta('5m 30s')
 
822
    datetime.timedelta(0, 330)
557
823
    """
558
 
    try:
559
 
        suffix=unicode(interval[-1])
560
 
        value=int(interval[:-1])
561
 
        if suffix == u"d":
562
 
            delta = datetime.timedelta(value)
563
 
        elif suffix == u"s":
564
 
            delta = datetime.timedelta(0, value)
565
 
        elif suffix == u"m":
566
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
567
 
        elif suffix == u"h":
568
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
569
 
        elif suffix == u"w":
570
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
571
 
        else:
 
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):
572
842
            raise ValueError
573
 
    except (ValueError, IndexError):
574
 
        raise ValueError
575
 
    return delta
 
843
        timevalue += delta
 
844
    return timevalue
576
845
 
577
846
 
578
847
def server_state_changed(state):
579
848
    """Derived from the Avahi example code"""
580
849
    if state == avahi.SERVER_COLLISION:
581
 
        logger.error(u"Server name collision")
 
850
        logger.error(u"Zeroconf server name collision")
582
851
        service.remove()
583
852
    elif state == avahi.SERVER_RUNNING:
584
853
        service.add()
586
855
 
587
856
def entry_group_state_changed(state, error):
588
857
    """Derived from the Avahi example code"""
589
 
    logger.debug(u"state change: %i", state)
 
858
    logger.debug(u"Avahi state change: %i", state)
590
859
    
591
860
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
592
 
        logger.debug(u"Service established.")
 
861
        logger.debug(u"Zeroconf service established.")
593
862
    elif state == avahi.ENTRY_GROUP_COLLISION:
594
 
        logger.warning(u"Service name collision.")
 
863
        logger.warning(u"Zeroconf service name collision.")
595
864
        service.rename()
596
865
    elif state == avahi.ENTRY_GROUP_FAILURE:
597
 
        logger.critical(u"Error in group state changed %s",
 
866
        logger.critical(u"Avahi: Error in group state changed %s",
598
867
                        unicode(error))
599
 
        raise AvahiGroupError("State changed: %s", str(error))
 
868
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
600
869
 
601
870
def if_nametoindex(interface):
602
871
    """Call the C function if_nametoindex(), or equivalent"""
603
872
    global if_nametoindex
604
873
    try:
605
 
        if "ctypes.util" not in sys.modules:
606
 
            import ctypes.util
607
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
608
 
            (ctypes.util.find_library("c")).if_nametoindex
 
874
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
875
                          (ctypes.util.find_library("c"))
 
876
                          .if_nametoindex)
609
877
    except (OSError, AttributeError):
610
878
        if "struct" not in sys.modules:
611
879
            import struct
614
882
        def if_nametoindex(interface):
615
883
            "Get an interface index the hard way, i.e. using fcntl()"
616
884
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
617
 
            s = socket.socket()
618
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
619
 
                                struct.pack("16s16x", interface))
620
 
            s.close()
 
885
            with closing(socket.socket()) as s:
 
886
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
887
                                    struct.pack("16s16x", interface))
621
888
            interface_index = struct.unpack("I", ifreq[16:20])[0]
622
889
            return interface_index
623
890
    return if_nametoindex(interface)
647
914
 
648
915
 
649
916
def main():
650
 
    global main_loop_started
651
 
    main_loop_started = False
652
 
    
653
 
    parser = OptionParser()
 
917
    parser = optparse.OptionParser(version = "%%prog %s" % version)
654
918
    parser.add_option("-i", "--interface", type="string",
655
919
                      metavar="IF", help="Bind to interface IF")
656
920
    parser.add_option("-a", "--address", type="string",
657
921
                      help="Address to listen for requests on")
658
922
    parser.add_option("-p", "--port", type="int",
659
923
                      help="Port number to receive requests on")
660
 
    parser.add_option("--check", action="store_true", default=False,
 
924
    parser.add_option("--check", action="store_true",
661
925
                      help="Run self-test")
662
926
    parser.add_option("--debug", action="store_true",
663
927
                      help="Debug mode; run in foreground and log to"
670
934
                      default="/etc/mandos", metavar="DIR",
671
935
                      help="Directory to search for configuration"
672
936
                      " files")
673
 
    (options, args) = parser.parse_args()
 
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]
674
944
    
675
945
    if options.check:
676
946
        import doctest
685
955
                        "priority":
686
956
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
687
957
                        "servicename": "Mandos",
 
958
                        "use_dbus": "True",
 
959
                        "use_ipv6": "True",
688
960
                        }
689
961
    
690
962
    # Parse config file for server-global settings
691
963
    server_config = ConfigParser.SafeConfigParser(server_defaults)
692
964
    del server_defaults
693
965
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
 
    server_section = "server"
695
966
    # Convert the SafeConfigParser object to a dict
696
 
    server_settings = dict(server_config.items(server_section))
697
 
    # Use getboolean on the boolean config option
698
 
    server_settings["debug"] = server_config.getboolean\
699
 
                               (server_section, "debug")
 
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")
700
978
    del server_config
701
979
    
702
980
    # Override the settings from the config file with command line
703
981
    # options, if set.
704
982
    for option in ("interface", "address", "port", "debug",
705
 
                   "priority", "servicename", "configdir"):
 
983
                   "priority", "servicename", "configdir",
 
984
                   "use_dbus", "use_ipv6"):
706
985
        value = getattr(options, option)
707
986
        if value is not None:
708
987
            server_settings[option] = value
709
988
    del options
710
989
    # Now we have our good server settings in "server_settings"
711
990
    
 
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
    
712
1006
    # Parse config file with clients
713
1007
    client_defaults = { "timeout": "1h",
714
1008
                        "interval": "5m",
715
 
                        "checker": "fping -q -- %%(fqdn)s",
 
1009
                        "checker": "fping -q -- %%(host)s",
 
1010
                        "host": "",
716
1011
                        }
717
1012
    client_config = ConfigParser.SafeConfigParser(client_defaults)
718
1013
    client_config.read(os.path.join(server_settings["configdir"],
719
1014
                                    "clients.conf"))
720
1015
    
 
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
    
721
1062
    global service
 
1063
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
722
1064
    service = AvahiService(name = server_settings["servicename"],
723
 
                           type = "_mandos._tcp", );
 
1065
                           servicetype = "_mandos._tcp",
 
1066
                           protocol = protocol)
724
1067
    if server_settings["interface"]:
725
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1068
        service.interface = (if_nametoindex
 
1069
                             (server_settings["interface"]))
726
1070
    
727
1071
    global main_loop
728
1072
    global bus
731
1075
    DBusGMainLoop(set_as_default=True )
732
1076
    main_loop = gobject.MainLoop()
733
1077
    bus = dbus.SystemBus()
734
 
    server = dbus.Interface(
735
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
736
 
            avahi.DBUS_INTERFACE_SERVER )
 
1078
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1079
                                           avahi.DBUS_PATH_SERVER),
 
1080
                            avahi.DBUS_INTERFACE_SERVER)
737
1081
    # End of Avahi example code
738
 
    
739
 
    debug = server_settings["debug"]
740
 
    
741
 
    if debug:
742
 
        console = logging.StreamHandler()
743
 
        # console.setLevel(logging.DEBUG)
744
 
        console.setFormatter(logging.Formatter\
745
 
                             ('%(levelname)s: %(message)s'))
746
 
        logger.addHandler(console)
747
 
        del console
748
 
    
749
 
    clients = Set()
750
 
    def remove_from_clients(client):
751
 
        clients.remove(client)
752
 
        if not clients:
753
 
            logger.critical(u"No clients left, exiting")
754
 
            sys.exit()
 
1082
    if use_dbus:
 
1083
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
755
1084
    
756
1085
    clients.update(Set(Client(name = section,
757
 
                              stop_hook = remove_from_clients,
758
1086
                              config
759
 
                              = dict(client_config.items(section)))
 
1087
                              = dict(client_config.items(section)),
 
1088
                              use_dbus = use_dbus)
760
1089
                       for section in client_config.sections()))
 
1090
    if not clients:
 
1091
        logger.warning(u"No clients defined")
761
1092
    
762
 
    if not debug:
 
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.
763
1103
        daemon()
764
 
 
765
 
    pidfilename = "/var/run/mandos/mandos.pid"
766
 
    pid = os.getpid()
 
1104
    
767
1105
    try:
768
 
        pidfile = open(pidfilename, "w")
 
1106
        pid = os.getpid()
769
1107
        pidfile.write(str(pid) + "\n")
770
1108
        pidfile.close()
771
1109
        del pidfile
772
 
    except IOError, err:
773
 
        logger.error("Could not write %s file with PID %d",
774
 
                     pidfilename, os.getpid())
 
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
775
1117
    
776
1118
    def cleanup():
777
1119
        "Cleanup function; run on exit"
784
1126
        
785
1127
        while clients:
786
1128
            client = clients.pop()
787
 
            client.stop_hook = None
788
 
            client.stop()
 
1129
            client.disable_hook = None
 
1130
            client.disable()
789
1131
    
790
1132
    atexit.register(cleanup)
791
1133
    
794
1136
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
795
1137
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
796
1138
    
 
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
    
797
1187
    for client in clients:
798
 
        client.start()
799
 
    
800
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
801
 
                                 server_settings["port"]),
802
 
                                tcp_handler,
803
 
                                settings=server_settings,
804
 
                                clients=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
    
805
1197
    # Find out what port we got
806
1198
    service.port = tcp_server.socket.getsockname()[1]
807
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
808
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
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())
809
1206
    
810
1207
    #service.interface = tcp_server.socket.getsockname()[3]
811
1208
    
821
1218
        
822
1219
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
823
1220
                             lambda *args, **kwargs:
824
 
                             tcp_server.handle_request\
825
 
                             (*args[2:], **kwargs) or True)
 
1221
                             (tcp_server.handle_request
 
1222
                              (*args[2:], **kwargs) or True))
826
1223
        
827
 
        logger.debug("Starting main loop")
828
 
        main_loop_started = True
 
1224
        logger.debug(u"Starting main loop")
829
1225
        main_loop.run()
830
1226
    except AvahiError, error:
831
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1227
        logger.critical(u"AvahiError: %s", error)
832
1228
        sys.exit(1)
833
1229
    except KeyboardInterrupt:
834
1230
        if debug:
835
 
            print
 
1231
            print >> sys.stderr
 
1232
        logger.debug("Server received KeyboardInterrupt")
 
1233
    logger.debug("Server exiting")
836
1234
 
837
1235
if __name__ == '__main__':
838
1236
    main()