/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • Committer: Teddy Hogeborn
  • Date: 2009-12-27 03:35:58 UTC
  • Revision ID: teddy@fukt.bsnet.se-20091227033558-y57wv1u4cls3i8kq
TODO file changes.

Show diffs side-by-side

added added

removed removed

Lines of Context:
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
9
# methods "add", "remove", "server_state_changed",
 
10
# "entry_group_state_changed", "cleanup", and "activate" in the
 
11
# "AvahiService" class, 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
 
import SocketServer
 
36
import SocketServer as 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
43
44
import gnutls.library.functions
44
45
import gnutls.library.constants
45
46
import gnutls.library.types
46
 
import ConfigParser
 
47
import ConfigParser as configparser
47
48
import sys
48
49
import re
49
50
import os
50
51
import signal
51
 
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
 
57
import pwd
 
58
import contextlib
 
59
import struct
 
60
import fcntl
 
61
import functools
 
62
import cPickle as pickle
57
63
 
58
64
import dbus
 
65
import dbus.service
59
66
import gobject
60
67
import avahi
61
68
from dbus.mainloop.glib import DBusGMainLoop
62
69
import ctypes
63
 
 
64
 
version = "1.0"
65
 
 
66
 
logger = logging.Logger('mandos')
67
 
syslogger = logging.handlers.SysLogHandler\
68
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
 
             address = "/dev/log")
70
 
syslogger.setFormatter(logging.Formatter\
71
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
70
import ctypes.util
 
71
import xml.dom.minidom
 
72
import inspect
 
73
 
 
74
try:
 
75
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
 
76
except AttributeError:
 
77
    try:
 
78
        from IN import SO_BINDTODEVICE
 
79
    except ImportError:
 
80
        SO_BINDTODEVICE = None
 
81
 
 
82
 
 
83
version = "1.0.14"
 
84
 
 
85
logger = logging.Logger(u'mandos')
 
86
syslogger = (logging.handlers.SysLogHandler
 
87
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
88
              address = "/dev/log"))
 
89
syslogger.setFormatter(logging.Formatter
 
90
                       (u'Mandos [%(process)d]: %(levelname)s:'
 
91
                        u' %(message)s'))
72
92
logger.addHandler(syslogger)
73
93
 
74
94
console = logging.StreamHandler()
75
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
 
                                       ' %(message)s'))
 
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
 
96
                                       u' %(levelname)s:'
 
97
                                       u' %(message)s'))
77
98
logger.addHandler(console)
78
99
 
79
100
class AvahiError(Exception):
80
 
    def __init__(self, value):
 
101
    def __init__(self, value, *args, **kwargs):
81
102
        self.value = value
82
 
    def __str__(self):
83
 
        return repr(self.value)
 
103
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
104
    def __unicode__(self):
 
105
        return unicode(repr(self.value))
84
106
 
85
107
class AvahiServiceError(AvahiError):
86
108
    pass
91
113
 
92
114
class AvahiService(object):
93
115
    """An Avahi (Zeroconf) service.
 
116
    
94
117
    Attributes:
95
118
    interface: integer; avahi.IF_UNSPEC or an interface index.
96
119
               Used to optionally bind to the specified interface.
97
 
    name: string; Example: 'Mandos'
98
 
    type: string; Example: '_mandos._tcp'.
 
120
    name: string; Example: u'Mandos'
 
121
    type: string; Example: u'_mandos._tcp'.
99
122
                  See <http://www.dns-sd.org/ServiceTypes.html>
100
123
    port: integer; what port to announce
101
124
    TXT: list of strings; TXT record for the service
104
127
    max_renames: integer; maximum number of renames
105
128
    rename_count: integer; counter so we only rename after collisions
106
129
                  a sensible number of times
 
130
    group: D-Bus Entry Group
 
131
    server: D-Bus Server
 
132
    bus: dbus.SystemBus()
107
133
    """
108
134
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
 
                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
135
                 servicetype = None, port = None, TXT = None,
 
136
                 domain = u"", host = u"", max_renames = 32768,
 
137
                 protocol = avahi.PROTO_UNSPEC, bus = None):
111
138
        self.interface = interface
112
139
        self.name = name
113
 
        self.type = type
 
140
        self.type = servicetype
114
141
        self.port = port
115
 
        if TXT is None:
116
 
            self.TXT = []
117
 
        else:
118
 
            self.TXT = TXT
 
142
        self.TXT = TXT if TXT is not None else []
119
143
        self.domain = domain
120
144
        self.host = host
121
145
        self.rename_count = 0
122
146
        self.max_renames = max_renames
 
147
        self.protocol = protocol
 
148
        self.group = None       # our entry group
 
149
        self.server = None
 
150
        self.bus = bus
123
151
    def rename(self):
124
152
        """Derived from the Avahi example code"""
125
153
        if self.rename_count >= self.max_renames:
126
 
            logger.critical(u"No suitable service name found after %i"
127
 
                            u" retries, exiting.", rename_count)
128
 
            raise AvahiServiceError("Too many renames")
129
 
        self.name = server.GetAlternativeServiceName(self.name)
130
 
        logger.info(u"Changing name to %r ...", str(self.name))
131
 
        syslogger.setFormatter(logging.Formatter\
132
 
                               ('Mandos (%s): %%(levelname)s:'
133
 
                               ' %%(message)s' % self.name))
 
154
            logger.critical(u"No suitable Zeroconf service name found"
 
155
                            u" after %i retries, exiting.",
 
156
                            self.rename_count)
 
157
            raise AvahiServiceError(u"Too many renames")
 
158
        self.name = self.server.GetAlternativeServiceName(self.name)
 
159
        logger.info(u"Changing Zeroconf service name to %r ...",
 
160
                    unicode(self.name))
 
161
        syslogger.setFormatter(logging.Formatter
 
162
                               (u'Mandos (%s) [%%(process)d]:'
 
163
                                u' %%(levelname)s: %%(message)s'
 
164
                                % self.name))
134
165
        self.remove()
135
166
        self.add()
136
167
        self.rename_count += 1
137
168
    def remove(self):
138
169
        """Derived from the Avahi example code"""
139
 
        if group is not None:
140
 
            group.Reset()
 
170
        if self.group is not None:
 
171
            self.group.Reset()
141
172
    def add(self):
142
173
        """Derived from the Avahi example code"""
143
 
        global group
144
 
        if group is None:
145
 
            group = dbus.Interface\
146
 
                    (bus.get_object(avahi.DBUS_NAME,
147
 
                                    server.EntryGroupNew()),
148
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
 
            group.connect_to_signal('StateChanged',
150
 
                                    entry_group_state_changed)
151
 
        logger.debug(u"Adding service '%s' of type '%s' ...",
152
 
                     service.name, service.type)
153
 
        group.AddService(
154
 
                self.interface,         # interface
155
 
                avahi.PROTO_INET6,      # protocol
156
 
                dbus.UInt32(0),         # flags
157
 
                self.name, self.type,
158
 
                self.domain, self.host,
159
 
                dbus.UInt16(self.port),
160
 
                avahi.string_array_to_txt_array(self.TXT))
161
 
        group.Commit()
162
 
 
163
 
# From the Avahi example code:
164
 
group = None                            # our entry group
165
 
# End of Avahi example code
 
174
        if self.group is None:
 
175
            self.group = dbus.Interface(
 
176
                self.bus.get_object(avahi.DBUS_NAME,
 
177
                                    self.server.EntryGroupNew()),
 
178
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
179
            self.group.connect_to_signal('StateChanged',
 
180
                                         self
 
181
                                         .entry_group_state_changed)
 
182
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
183
                     self.name, self.type)
 
184
        self.group.AddService(
 
185
            self.interface,
 
186
            self.protocol,
 
187
            dbus.UInt32(0),     # flags
 
188
            self.name, self.type,
 
189
            self.domain, self.host,
 
190
            dbus.UInt16(self.port),
 
191
            avahi.string_array_to_txt_array(self.TXT))
 
192
        self.group.Commit()
 
193
    def entry_group_state_changed(self, state, error):
 
194
        """Derived from the Avahi example code"""
 
195
        logger.debug(u"Avahi state change: %i", state)
 
196
        
 
197
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
198
            logger.debug(u"Zeroconf service established.")
 
199
        elif state == avahi.ENTRY_GROUP_COLLISION:
 
200
            logger.warning(u"Zeroconf service name collision.")
 
201
            self.rename()
 
202
        elif state == avahi.ENTRY_GROUP_FAILURE:
 
203
            logger.critical(u"Avahi: Error in group state changed %s",
 
204
                            unicode(error))
 
205
            raise AvahiGroupError(u"State changed: %s"
 
206
                                  % unicode(error))
 
207
    def cleanup(self):
 
208
        """Derived from the Avahi example code"""
 
209
        if self.group is not None:
 
210
            self.group.Free()
 
211
            self.group = None
 
212
    def server_state_changed(self, state):
 
213
        """Derived from the Avahi example code"""
 
214
        if state == avahi.SERVER_COLLISION:
 
215
            logger.error(u"Zeroconf server name collision")
 
216
            self.remove()
 
217
        elif state == avahi.SERVER_RUNNING:
 
218
            self.add()
 
219
    def activate(self):
 
220
        """Derived from the Avahi example code"""
 
221
        if self.server is None:
 
222
            self.server = dbus.Interface(
 
223
                self.bus.get_object(avahi.DBUS_NAME,
 
224
                                    avahi.DBUS_PATH_SERVER),
 
225
                avahi.DBUS_INTERFACE_SERVER)
 
226
        self.server.connect_to_signal(u"StateChanged",
 
227
                                 self.server_state_changed)
 
228
        self.server_state_changed(self.server.GetState())
166
229
 
167
230
 
168
231
class Client(object):
169
232
    """A representation of a client host served by this server.
 
233
    
170
234
    Attributes:
171
 
    name:      string; from the config file, used in log messages
 
235
    name:       string; from the config file, used in log messages and
 
236
                        D-Bus identifiers
172
237
    fingerprint: string (40 or 32 hexadecimal digits); used to
173
238
                 uniquely identify the client
174
 
    secret:    bytestring; sent verbatim (over TLS) to client
175
 
    host:      string; available for use by the checker command
176
 
    created:   datetime.datetime(); object creation, not client host
177
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
178
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
179
 
                                     until this client is invalid
180
 
    interval:  datetime.timedelta(); How often to start a new checker
181
 
    stop_hook: If set, called by stop() as stop_hook(self)
182
 
    checker:   subprocess.Popen(); a running checker process used
183
 
                                   to see if the client lives.
184
 
                                   'None' if no process is running.
 
239
    secret:     bytestring; sent verbatim (over TLS) to client
 
240
    host:       string; available for use by the checker command
 
241
    created:    datetime.datetime(); (UTC) object creation
 
242
    last_enabled: datetime.datetime(); (UTC)
 
243
    enabled:    bool()
 
244
    last_checked_ok: datetime.datetime(); (UTC) or None
 
245
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
246
                                      until this client is disabled
 
247
    interval:   datetime.timedelta(); How often to start a new checker
 
248
    disable_hook:  If set, called by disable() as disable_hook(self)
 
249
    checker:    subprocess.Popen(); a running checker process used
 
250
                                    to see if the client lives.
 
251
                                    'None' if no process is running.
185
252
    checker_initiator_tag: a gobject event source tag, or None
186
 
    stop_initiator_tag:    - '' -
 
253
    disable_initiator_tag: - '' -
187
254
    checker_callback_tag:  - '' -
188
255
    checker_command: string; External command which is run to check if
189
256
                     client lives.  %() expansions are done at
190
257
                     runtime with vars(self) as dict, so that for
191
258
                     instance %(name)s can be used in the command.
192
 
    Private attibutes:
193
 
    _timeout: Real variable for 'timeout'
194
 
    _interval: Real variable for 'interval'
195
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
196
 
    _interval_milliseconds: - '' -
 
259
    current_checker_command: string; current running checker_command
197
260
    """
198
 
    def _set_timeout(self, timeout):
199
 
        "Setter function for 'timeout' attribute"
200
 
        self._timeout = timeout
201
 
        self._timeout_milliseconds = ((self.timeout.days
202
 
                                       * 24 * 60 * 60 * 1000)
203
 
                                      + (self.timeout.seconds * 1000)
204
 
                                      + (self.timeout.microseconds
205
 
                                         // 1000))
206
 
    timeout = property(lambda self: self._timeout,
207
 
                       _set_timeout)
208
 
    del _set_timeout
209
 
    def _set_interval(self, interval):
210
 
        "Setter function for 'interval' attribute"
211
 
        self._interval = interval
212
 
        self._interval_milliseconds = ((self.interval.days
213
 
                                        * 24 * 60 * 60 * 1000)
214
 
                                       + (self.interval.seconds
215
 
                                          * 1000)
216
 
                                       + (self.interval.microseconds
217
 
                                          // 1000))
218
 
    interval = property(lambda self: self._interval,
219
 
                        _set_interval)
220
 
    del _set_interval
221
 
    def __init__(self, name = None, stop_hook=None, config={}):
 
261
    
 
262
    @staticmethod
 
263
    def _timedelta_to_milliseconds(td):
 
264
        "Convert a datetime.timedelta() to milliseconds"
 
265
        return ((td.days * 24 * 60 * 60 * 1000)
 
266
                + (td.seconds * 1000)
 
267
                + (td.microseconds // 1000))
 
268
    
 
269
    def timeout_milliseconds(self):
 
270
        "Return the 'timeout' attribute in milliseconds"
 
271
        return self._timedelta_to_milliseconds(self.timeout)
 
272
    
 
273
    def interval_milliseconds(self):
 
274
        "Return the 'interval' attribute in milliseconds"
 
275
        return self._timedelta_to_milliseconds(self.interval)
 
276
    
 
277
    def __init__(self, name = None, disable_hook=None, config=None):
222
278
        """Note: the 'checker' key in 'config' sets the
223
279
        'checker_command' attribute and *not* the 'checker'
224
280
        attribute."""
225
281
        self.name = name
 
282
        if config is None:
 
283
            config = {}
226
284
        logger.debug(u"Creating client %r", self.name)
227
285
        # Uppercase and remove spaces from fingerprint for later
228
286
        # comparison purposes with return value from the fingerprint()
229
287
        # function
230
 
        self.fingerprint = config["fingerprint"].upper()\
231
 
                           .replace(u" ", u"")
 
288
        self.fingerprint = (config[u"fingerprint"].upper()
 
289
                            .replace(u" ", u""))
232
290
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
233
 
        if "secret" in config:
234
 
            self.secret = config["secret"].decode(u"base64")
235
 
        elif "secfile" in config:
236
 
            sf = open(config["secfile"])
237
 
            self.secret = sf.read()
238
 
            sf.close()
 
291
        if u"secret" in config:
 
292
            self.secret = config[u"secret"].decode(u"base64")
 
293
        elif u"secfile" in config:
 
294
            with open(os.path.expanduser(os.path.expandvars
 
295
                                         (config[u"secfile"])),
 
296
                      "rb") as secfile:
 
297
                self.secret = secfile.read()
239
298
        else:
240
299
            raise TypeError(u"No secret or secfile for client %s"
241
300
                            % self.name)
242
 
        self.host = config.get("host", "")
243
 
        self.created = datetime.datetime.now()
 
301
        self.host = config.get(u"host", u"")
 
302
        self.created = datetime.datetime.utcnow()
 
303
        self.enabled = False
 
304
        self.last_enabled = None
244
305
        self.last_checked_ok = None
245
 
        self.timeout = string_to_delta(config["timeout"])
246
 
        self.interval = string_to_delta(config["interval"])
247
 
        self.stop_hook = stop_hook
 
306
        self.timeout = string_to_delta(config[u"timeout"])
 
307
        self.interval = string_to_delta(config[u"interval"])
 
308
        self.disable_hook = disable_hook
248
309
        self.checker = None
249
310
        self.checker_initiator_tag = None
250
 
        self.stop_initiator_tag = None
 
311
        self.disable_initiator_tag = None
251
312
        self.checker_callback_tag = None
252
 
        self.check_command = config["checker"]
253
 
    def start(self):
 
313
        self.checker_command = config[u"checker"]
 
314
        self.current_checker_command = None
 
315
        self.last_connect = None
 
316
    
 
317
    def enable(self):
254
318
        """Start this client's checker and timeout hooks"""
 
319
        if getattr(self, u"enabled", False):
 
320
            # Already enabled
 
321
            return
 
322
        self.last_enabled = datetime.datetime.utcnow()
255
323
        # Schedule a new checker to be started an 'interval' from now,
256
324
        # and every interval from then on.
257
 
        self.checker_initiator_tag = gobject.timeout_add\
258
 
                                     (self._interval_milliseconds,
259
 
                                      self.start_checker)
 
325
        self.checker_initiator_tag = (gobject.timeout_add
 
326
                                      (self.interval_milliseconds(),
 
327
                                       self.start_checker))
 
328
        # Schedule a disable() when 'timeout' has passed
 
329
        self.disable_initiator_tag = (gobject.timeout_add
 
330
                                   (self.timeout_milliseconds(),
 
331
                                    self.disable))
 
332
        self.enabled = True
260
333
        # Also start a new checker *right now*.
261
334
        self.start_checker()
262
 
        # Schedule a stop() when 'timeout' has passed
263
 
        self.stop_initiator_tag = gobject.timeout_add\
264
 
                                  (self._timeout_milliseconds,
265
 
                                   self.stop)
266
 
    def stop(self):
267
 
        """Stop this client.
268
 
        The possibility that a client might be restarted is left open,
269
 
        but not currently used."""
270
 
        # If this client doesn't have a secret, it is already stopped.
271
 
        if hasattr(self, "secret") and self.secret:
272
 
            logger.info(u"Stopping client %s", self.name)
273
 
            self.secret = None
274
 
        else:
 
335
    
 
336
    def disable(self, quiet=True):
 
337
        """Disable this client."""
 
338
        if not getattr(self, "enabled", False):
275
339
            return False
276
 
        if getattr(self, "stop_initiator_tag", False):
277
 
            gobject.source_remove(self.stop_initiator_tag)
278
 
            self.stop_initiator_tag = None
279
 
        if getattr(self, "checker_initiator_tag", False):
 
340
        if not quiet:
 
341
            logger.info(u"Disabling client %s", self.name)
 
342
        if getattr(self, u"disable_initiator_tag", False):
 
343
            gobject.source_remove(self.disable_initiator_tag)
 
344
            self.disable_initiator_tag = None
 
345
        if getattr(self, u"checker_initiator_tag", False):
280
346
            gobject.source_remove(self.checker_initiator_tag)
281
347
            self.checker_initiator_tag = None
282
348
        self.stop_checker()
283
 
        if self.stop_hook:
284
 
            self.stop_hook(self)
 
349
        if self.disable_hook:
 
350
            self.disable_hook(self)
 
351
        self.enabled = False
285
352
        # Do not run this again if called by a gobject.timeout_add
286
353
        return False
 
354
    
287
355
    def __del__(self):
288
 
        self.stop_hook = None
289
 
        self.stop()
290
 
    def checker_callback(self, pid, condition):
 
356
        self.disable_hook = None
 
357
        self.disable()
 
358
    
 
359
    def checker_callback(self, pid, condition, command):
291
360
        """The checker has completed, so take appropriate actions."""
292
 
        now = datetime.datetime.now()
293
361
        self.checker_callback_tag = None
294
362
        self.checker = None
295
 
        if os.WIFEXITED(condition) \
296
 
               and (os.WEXITSTATUS(condition) == 0):
297
 
            logger.info(u"Checker for %(name)s succeeded",
298
 
                        vars(self))
299
 
            self.last_checked_ok = now
300
 
            gobject.source_remove(self.stop_initiator_tag)
301
 
            self.stop_initiator_tag = gobject.timeout_add\
302
 
                                      (self._timeout_milliseconds,
303
 
                                       self.stop)
304
 
        elif not os.WIFEXITED(condition):
 
363
        if os.WIFEXITED(condition):
 
364
            exitstatus = os.WEXITSTATUS(condition)
 
365
            if exitstatus == 0:
 
366
                logger.info(u"Checker for %(name)s succeeded",
 
367
                            vars(self))
 
368
                self.checked_ok()
 
369
            else:
 
370
                logger.info(u"Checker for %(name)s failed",
 
371
                            vars(self))
 
372
        else:
305
373
            logger.warning(u"Checker for %(name)s crashed?",
306
374
                           vars(self))
307
 
        else:
308
 
            logger.info(u"Checker for %(name)s failed",
309
 
                        vars(self))
 
375
    
 
376
    def checked_ok(self):
 
377
        """Bump up the timeout for this client.
 
378
        
 
379
        This should only be called when the client has been seen,
 
380
        alive and well.
 
381
        """
 
382
        self.last_checked_ok = datetime.datetime.utcnow()
 
383
        gobject.source_remove(self.disable_initiator_tag)
 
384
        self.disable_initiator_tag = (gobject.timeout_add
 
385
                                      (self.timeout_milliseconds(),
 
386
                                       self.disable))
 
387
    
310
388
    def start_checker(self):
311
389
        """Start a new checker subprocess if one is not running.
 
390
        
312
391
        If a checker already exists, leave it running and do
313
392
        nothing."""
314
393
        # The reason for not killing a running checker is that if we
317
396
        # client would inevitably timeout, since no checker would get
318
397
        # a chance to run to completion.  If we instead leave running
319
398
        # checkers alone, the checker would have to take more time
320
 
        # than 'timeout' for the client to be declared invalid, which
321
 
        # is as it should be.
 
399
        # than 'timeout' for the client to be disabled, which is as it
 
400
        # should be.
 
401
        
 
402
        # If a checker exists, make sure it is not a zombie
 
403
        try:
 
404
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
405
        except (AttributeError, OSError), error:
 
406
            if (isinstance(error, OSError)
 
407
                and error.errno != errno.ECHILD):
 
408
                raise error
 
409
        else:
 
410
            if pid:
 
411
                logger.warning(u"Checker was a zombie")
 
412
                gobject.source_remove(self.checker_callback_tag)
 
413
                self.checker_callback(pid, status,
 
414
                                      self.current_checker_command)
 
415
        # Start a new checker if needed
322
416
        if self.checker is None:
323
417
            try:
324
 
                # In case check_command has exactly one % operator
325
 
                command = self.check_command % self.host
 
418
                # In case checker_command has exactly one % operator
 
419
                command = self.checker_command % self.host
326
420
            except TypeError:
327
421
                # Escape attributes for the shell
328
 
                escaped_attrs = dict((key, re.escape(str(val)))
 
422
                escaped_attrs = dict((key,
 
423
                                      re.escape(unicode(str(val),
 
424
                                                        errors=
 
425
                                                        u'replace')))
329
426
                                     for key, val in
330
427
                                     vars(self).iteritems())
331
428
                try:
332
 
                    command = self.check_command % escaped_attrs
 
429
                    command = self.checker_command % escaped_attrs
333
430
                except TypeError, error:
334
431
                    logger.error(u'Could not format string "%s":'
335
 
                                 u' %s', self.check_command, error)
 
432
                                 u' %s', self.checker_command, error)
336
433
                    return True # Try again later
 
434
            self.current_checker_command = command
337
435
            try:
338
436
                logger.info(u"Starting checker %r for %s",
339
437
                            command, self.name)
 
438
                # We don't need to redirect stdout and stderr, since
 
439
                # in normal mode, that is already done by daemon(),
 
440
                # and in debug mode we don't want to.  (Stdin is
 
441
                # always replaced by /dev/null.)
340
442
                self.checker = subprocess.Popen(command,
341
443
                                                close_fds=True,
342
 
                                                shell=True, cwd="/")
343
 
                self.checker_callback_tag = gobject.child_watch_add\
344
 
                                            (self.checker.pid,
345
 
                                             self.checker_callback)
346
 
            except subprocess.OSError, error:
 
444
                                                shell=True, cwd=u"/")
 
445
                self.checker_callback_tag = (gobject.child_watch_add
 
446
                                             (self.checker.pid,
 
447
                                              self.checker_callback,
 
448
                                              data=command))
 
449
                # The checker may have completed before the gobject
 
450
                # watch was added.  Check for this.
 
451
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
452
                if pid:
 
453
                    gobject.source_remove(self.checker_callback_tag)
 
454
                    self.checker_callback(pid, status, command)
 
455
            except OSError, error:
347
456
                logger.error(u"Failed to start subprocess: %s",
348
457
                             error)
349
458
        # Re-run this periodically if run by gobject.timeout_add
350
459
        return True
 
460
    
351
461
    def stop_checker(self):
352
462
        """Force the checker process, if any, to stop."""
353
463
        if self.checker_callback_tag:
354
464
            gobject.source_remove(self.checker_callback_tag)
355
465
            self.checker_callback_tag = None
356
 
        if getattr(self, "checker", None) is None:
 
466
        if getattr(self, u"checker", None) is None:
357
467
            return
358
468
        logger.debug(u"Stopping checker for %(name)s", vars(self))
359
469
        try:
360
470
            os.kill(self.checker.pid, signal.SIGTERM)
361
 
            #os.sleep(0.5)
 
471
            #time.sleep(0.5)
362
472
            #if self.checker.poll() is None:
363
473
            #    os.kill(self.checker.pid, signal.SIGKILL)
364
474
        except OSError, error:
365
475
            if error.errno != errno.ESRCH: # No such process
366
476
                raise
367
477
        self.checker = None
368
 
    def still_valid(self):
369
 
        """Has the timeout not yet passed for this client?"""
370
 
        now = datetime.datetime.now()
 
478
 
 
479
 
 
480
def dbus_service_property(dbus_interface, signature=u"v",
 
481
                          access=u"readwrite", byte_arrays=False):
 
482
    """Decorators for marking methods of a DBusObjectWithProperties to
 
483
    become properties on the D-Bus.
 
484
    
 
485
    The decorated method will be called with no arguments by "Get"
 
486
    and with one argument by "Set".
 
487
    
 
488
    The parameters, where they are supported, are the same as
 
489
    dbus.service.method, except there is only "signature", since the
 
490
    type from Get() and the type sent to Set() is the same.
 
491
    """
 
492
    # Encoding deeply encoded byte arrays is not supported yet by the
 
493
    # "Set" method, so we fail early here:
 
494
    if byte_arrays and signature != u"ay":
 
495
        raise ValueError(u"Byte arrays not supported for non-'ay'"
 
496
                         u" signature %r" % signature)
 
497
    def decorator(func):
 
498
        func._dbus_is_property = True
 
499
        func._dbus_interface = dbus_interface
 
500
        func._dbus_signature = signature
 
501
        func._dbus_access = access
 
502
        func._dbus_name = func.__name__
 
503
        if func._dbus_name.endswith(u"_dbus_property"):
 
504
            func._dbus_name = func._dbus_name[:-14]
 
505
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
 
506
        return func
 
507
    return decorator
 
508
 
 
509
 
 
510
class DBusPropertyException(dbus.exceptions.DBusException):
 
511
    """A base class for D-Bus property-related exceptions
 
512
    """
 
513
    def __unicode__(self):
 
514
        return unicode(str(self))
 
515
 
 
516
 
 
517
class DBusPropertyAccessException(DBusPropertyException):
 
518
    """A property's access permissions disallows an operation.
 
519
    """
 
520
    pass
 
521
 
 
522
 
 
523
class DBusPropertyNotFound(DBusPropertyException):
 
524
    """An attempt was made to access a non-existing property.
 
525
    """
 
526
    pass
 
527
 
 
528
 
 
529
class DBusObjectWithProperties(dbus.service.Object):
 
530
    """A D-Bus object with properties.
 
531
 
 
532
    Classes inheriting from this can use the dbus_service_property
 
533
    decorator to expose methods as D-Bus properties.  It exposes the
 
534
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
535
    """
 
536
    
 
537
    @staticmethod
 
538
    def _is_dbus_property(obj):
 
539
        return getattr(obj, u"_dbus_is_property", False)
 
540
    
 
541
    def _get_all_dbus_properties(self):
 
542
        """Returns a generator of (name, attribute) pairs
 
543
        """
 
544
        return ((prop._dbus_name, prop)
 
545
                for name, prop in
 
546
                inspect.getmembers(self, self._is_dbus_property))
 
547
    
 
548
    def _get_dbus_property(self, interface_name, property_name):
 
549
        """Returns a bound method if one exists which is a D-Bus
 
550
        property with the specified name and interface.
 
551
        """
 
552
        for name in (property_name,
 
553
                     property_name + u"_dbus_property"):
 
554
            prop = getattr(self, name, None)
 
555
            if (prop is None
 
556
                or not self._is_dbus_property(prop)
 
557
                or prop._dbus_name != property_name
 
558
                or (interface_name and prop._dbus_interface
 
559
                    and interface_name != prop._dbus_interface)):
 
560
                continue
 
561
            return prop
 
562
        # No such property
 
563
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
 
564
                                   + interface_name + u"."
 
565
                                   + property_name)
 
566
    
 
567
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
 
568
                         out_signature=u"v")
 
569
    def Get(self, interface_name, property_name):
 
570
        """Standard D-Bus property Get() method, see D-Bus standard.
 
571
        """
 
572
        prop = self._get_dbus_property(interface_name, property_name)
 
573
        if prop._dbus_access == u"write":
 
574
            raise DBusPropertyAccessException(property_name)
 
575
        value = prop()
 
576
        if not hasattr(value, u"variant_level"):
 
577
            return value
 
578
        return type(value)(value, variant_level=value.variant_level+1)
 
579
    
 
580
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
 
581
    def Set(self, interface_name, property_name, value):
 
582
        """Standard D-Bus property Set() method, see D-Bus standard.
 
583
        """
 
584
        prop = self._get_dbus_property(interface_name, property_name)
 
585
        if prop._dbus_access == u"read":
 
586
            raise DBusPropertyAccessException(property_name)
 
587
        if prop._dbus_get_args_options[u"byte_arrays"]:
 
588
            # The byte_arrays option is not supported yet on
 
589
            # signatures other than "ay".
 
590
            if prop._dbus_signature != u"ay":
 
591
                raise ValueError
 
592
            value = dbus.ByteArray(''.join(unichr(byte)
 
593
                                           for byte in value))
 
594
        prop(value)
 
595
    
 
596
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
 
597
                         out_signature=u"a{sv}")
 
598
    def GetAll(self, interface_name):
 
599
        """Standard D-Bus property GetAll() method, see D-Bus
 
600
        standard.
 
601
 
 
602
        Note: Will not include properties with access="write".
 
603
        """
 
604
        all = {}
 
605
        for name, prop in self._get_all_dbus_properties():
 
606
            if (interface_name
 
607
                and interface_name != prop._dbus_interface):
 
608
                # Interface non-empty but did not match
 
609
                continue
 
610
            # Ignore write-only properties
 
611
            if prop._dbus_access == u"write":
 
612
                continue
 
613
            value = prop()
 
614
            if not hasattr(value, u"variant_level"):
 
615
                all[name] = value
 
616
                continue
 
617
            all[name] = type(value)(value, variant_level=
 
618
                                    value.variant_level+1)
 
619
        return dbus.Dictionary(all, signature=u"sv")
 
620
    
 
621
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
622
                         out_signature=u"s",
 
623
                         path_keyword='object_path',
 
624
                         connection_keyword='connection')
 
625
    def Introspect(self, object_path, connection):
 
626
        """Standard D-Bus method, overloaded to insert property tags.
 
627
        """
 
628
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
629
                                                   connection)
 
630
        try:
 
631
            document = xml.dom.minidom.parseString(xmlstring)
 
632
            def make_tag(document, name, prop):
 
633
                e = document.createElement(u"property")
 
634
                e.setAttribute(u"name", name)
 
635
                e.setAttribute(u"type", prop._dbus_signature)
 
636
                e.setAttribute(u"access", prop._dbus_access)
 
637
                return e
 
638
            for if_tag in document.getElementsByTagName(u"interface"):
 
639
                for tag in (make_tag(document, name, prop)
 
640
                            for name, prop
 
641
                            in self._get_all_dbus_properties()
 
642
                            if prop._dbus_interface
 
643
                            == if_tag.getAttribute(u"name")):
 
644
                    if_tag.appendChild(tag)
 
645
                # Add the names to the return values for the
 
646
                # "org.freedesktop.DBus.Properties" methods
 
647
                if (if_tag.getAttribute(u"name")
 
648
                    == u"org.freedesktop.DBus.Properties"):
 
649
                    for cn in if_tag.getElementsByTagName(u"method"):
 
650
                        if cn.getAttribute(u"name") == u"Get":
 
651
                            for arg in cn.getElementsByTagName(u"arg"):
 
652
                                if (arg.getAttribute(u"direction")
 
653
                                    == u"out"):
 
654
                                    arg.setAttribute(u"name", u"value")
 
655
                        elif cn.getAttribute(u"name") == u"GetAll":
 
656
                            for arg in cn.getElementsByTagName(u"arg"):
 
657
                                if (arg.getAttribute(u"direction")
 
658
                                    == u"out"):
 
659
                                    arg.setAttribute(u"name", u"props")
 
660
            xmlstring = document.toxml(u"utf-8")
 
661
            document.unlink()
 
662
        except (AttributeError, xml.dom.DOMException,
 
663
                xml.parsers.expat.ExpatError), error:
 
664
            logger.error(u"Failed to override Introspection method",
 
665
                         error)
 
666
        return xmlstring
 
667
 
 
668
 
 
669
class ClientDBus(Client, DBusObjectWithProperties):
 
670
    """A Client class using D-Bus
 
671
    
 
672
    Attributes:
 
673
    dbus_object_path: dbus.ObjectPath
 
674
    bus: dbus.SystemBus()
 
675
    """
 
676
    # dbus.service.Object doesn't use super(), so we can't either.
 
677
    
 
678
    def __init__(self, bus = None, *args, **kwargs):
 
679
        self.bus = bus
 
680
        Client.__init__(self, *args, **kwargs)
 
681
        # Only now, when this client is initialized, can it show up on
 
682
        # the D-Bus
 
683
        self.dbus_object_path = (dbus.ObjectPath
 
684
                                 (u"/clients/"
 
685
                                  + self.name.replace(u".", u"_")))
 
686
        DBusObjectWithProperties.__init__(self, self.bus,
 
687
                                          self.dbus_object_path)
 
688
    
 
689
    @staticmethod
 
690
    def _datetime_to_dbus(dt, variant_level=0):
 
691
        """Convert a UTC datetime.datetime() to a D-Bus type."""
 
692
        return dbus.String(dt.isoformat(),
 
693
                           variant_level=variant_level)
 
694
    
 
695
    def enable(self):
 
696
        oldstate = getattr(self, u"enabled", False)
 
697
        r = Client.enable(self)
 
698
        if oldstate != self.enabled:
 
699
            # Emit D-Bus signals
 
700
            self.PropertyChanged(dbus.String(u"enabled"),
 
701
                                 dbus.Boolean(True, variant_level=1))
 
702
            self.PropertyChanged(
 
703
                dbus.String(u"last_enabled"),
 
704
                self._datetime_to_dbus(self.last_enabled,
 
705
                                       variant_level=1))
 
706
        return r
 
707
    
 
708
    def disable(self, quiet = False):
 
709
        oldstate = getattr(self, u"enabled", False)
 
710
        r = Client.disable(self, quiet=quiet)
 
711
        if not quiet and oldstate != self.enabled:
 
712
            # Emit D-Bus signal
 
713
            self.PropertyChanged(dbus.String(u"enabled"),
 
714
                                 dbus.Boolean(False, variant_level=1))
 
715
        return r
 
716
    
 
717
    def __del__(self, *args, **kwargs):
 
718
        try:
 
719
            self.remove_from_connection()
 
720
        except LookupError:
 
721
            pass
 
722
        if hasattr(DBusObjectWithProperties, u"__del__"):
 
723
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
724
        Client.__del__(self, *args, **kwargs)
 
725
    
 
726
    def checker_callback(self, pid, condition, command,
 
727
                         *args, **kwargs):
 
728
        self.checker_callback_tag = None
 
729
        self.checker = None
 
730
        # Emit D-Bus signal
 
731
        self.PropertyChanged(dbus.String(u"checker_running"),
 
732
                             dbus.Boolean(False, variant_level=1))
 
733
        if os.WIFEXITED(condition):
 
734
            exitstatus = os.WEXITSTATUS(condition)
 
735
            # Emit D-Bus signal
 
736
            self.CheckerCompleted(dbus.Int16(exitstatus),
 
737
                                  dbus.Int64(condition),
 
738
                                  dbus.String(command))
 
739
        else:
 
740
            # Emit D-Bus signal
 
741
            self.CheckerCompleted(dbus.Int16(-1),
 
742
                                  dbus.Int64(condition),
 
743
                                  dbus.String(command))
 
744
        
 
745
        return Client.checker_callback(self, pid, condition, command,
 
746
                                       *args, **kwargs)
 
747
    
 
748
    def checked_ok(self, *args, **kwargs):
 
749
        r = Client.checked_ok(self, *args, **kwargs)
 
750
        # Emit D-Bus signal
 
751
        self.PropertyChanged(
 
752
            dbus.String(u"last_checked_ok"),
 
753
            (self._datetime_to_dbus(self.last_checked_ok,
 
754
                                    variant_level=1)))
 
755
        return r
 
756
    
 
757
    def start_checker(self, *args, **kwargs):
 
758
        old_checker = self.checker
 
759
        if self.checker is not None:
 
760
            old_checker_pid = self.checker.pid
 
761
        else:
 
762
            old_checker_pid = None
 
763
        r = Client.start_checker(self, *args, **kwargs)
 
764
        # Only if new checker process was started
 
765
        if (self.checker is not None
 
766
            and old_checker_pid != self.checker.pid):
 
767
            # Emit D-Bus signal
 
768
            self.CheckerStarted(self.current_checker_command)
 
769
            self.PropertyChanged(
 
770
                dbus.String(u"checker_running"),
 
771
                dbus.Boolean(True, variant_level=1))
 
772
        return r
 
773
    
 
774
    def stop_checker(self, *args, **kwargs):
 
775
        old_checker = getattr(self, u"checker", None)
 
776
        r = Client.stop_checker(self, *args, **kwargs)
 
777
        if (old_checker is not None
 
778
            and getattr(self, u"checker", None) is None):
 
779
            self.PropertyChanged(dbus.String(u"checker_running"),
 
780
                                 dbus.Boolean(False, variant_level=1))
 
781
        return r
 
782
    
 
783
    ## D-Bus methods & signals
 
784
    _interface = u"se.bsnet.fukt.Mandos.Client"
 
785
    
 
786
    # CheckedOK - method
 
787
    @dbus.service.method(_interface)
 
788
    def CheckedOK(self):
 
789
        return self.checked_ok()
 
790
    
 
791
    # CheckerCompleted - signal
 
792
    @dbus.service.signal(_interface, signature=u"nxs")
 
793
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
794
        "D-Bus signal"
 
795
        pass
 
796
    
 
797
    # CheckerStarted - signal
 
798
    @dbus.service.signal(_interface, signature=u"s")
 
799
    def CheckerStarted(self, command):
 
800
        "D-Bus signal"
 
801
        pass
 
802
    
 
803
    # PropertyChanged - signal
 
804
    @dbus.service.signal(_interface, signature=u"sv")
 
805
    def PropertyChanged(self, property, value):
 
806
        "D-Bus signal"
 
807
        pass
 
808
    
 
809
    # GotSecret - signal
 
810
    @dbus.service.signal(_interface)
 
811
    def GotSecret(self):
 
812
        "D-Bus signal"
 
813
        pass
 
814
    
 
815
    # Rejected - signal
 
816
    @dbus.service.signal(_interface)
 
817
    def Rejected(self):
 
818
        "D-Bus signal"
 
819
        pass
 
820
    
 
821
    # Enable - method
 
822
    @dbus.service.method(_interface)
 
823
    def Enable(self):
 
824
        "D-Bus method"
 
825
        self.enable()
 
826
    
 
827
    # StartChecker - method
 
828
    @dbus.service.method(_interface)
 
829
    def StartChecker(self):
 
830
        "D-Bus method"
 
831
        self.start_checker()
 
832
    
 
833
    # Disable - method
 
834
    @dbus.service.method(_interface)
 
835
    def Disable(self):
 
836
        "D-Bus method"
 
837
        self.disable()
 
838
    
 
839
    # StopChecker - method
 
840
    @dbus.service.method(_interface)
 
841
    def StopChecker(self):
 
842
        self.stop_checker()
 
843
    
 
844
    # name - property
 
845
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
846
    def name_dbus_property(self):
 
847
        return dbus.String(self.name)
 
848
    
 
849
    # fingerprint - property
 
850
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
851
    def fingerprint_dbus_property(self):
 
852
        return dbus.String(self.fingerprint)
 
853
    
 
854
    # host - property
 
855
    @dbus_service_property(_interface, signature=u"s",
 
856
                           access=u"readwrite")
 
857
    def host_dbus_property(self, value=None):
 
858
        if value is None:       # get
 
859
            return dbus.String(self.host)
 
860
        self.host = value
 
861
        # Emit D-Bus signal
 
862
        self.PropertyChanged(dbus.String(u"host"),
 
863
                             dbus.String(value, variant_level=1))
 
864
    
 
865
    # created - property
 
866
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
867
    def created_dbus_property(self):
 
868
        return dbus.String(self._datetime_to_dbus(self.created))
 
869
    
 
870
    # last_enabled - property
 
871
    @dbus_service_property(_interface, signature=u"s", access=u"read")
 
872
    def last_enabled_dbus_property(self):
 
873
        if self.last_enabled is None:
 
874
            return dbus.String(u"")
 
875
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
 
876
    
 
877
    # enabled - property
 
878
    @dbus_service_property(_interface, signature=u"b",
 
879
                           access=u"readwrite")
 
880
    def enabled_dbus_property(self, value=None):
 
881
        if value is None:       # get
 
882
            return dbus.Boolean(self.enabled)
 
883
        if value:
 
884
            self.enable()
 
885
        else:
 
886
            self.disable()
 
887
    
 
888
    # last_checked_ok - property
 
889
    @dbus_service_property(_interface, signature=u"s",
 
890
                           access=u"readwrite")
 
891
    def last_checked_ok_dbus_property(self, value=None):
 
892
        if value is not None:
 
893
            self.checked_ok()
 
894
            return
371
895
        if self.last_checked_ok is None:
372
 
            return now < (self.created + self.timeout)
373
 
        else:
374
 
            return now < (self.last_checked_ok + self.timeout)
375
 
 
376
 
 
377
 
def peer_certificate(session):
378
 
    "Return the peer's OpenPGP certificate as a bytestring"
379
 
    # If not an OpenPGP certificate...
380
 
    if gnutls.library.functions.gnutls_certificate_type_get\
381
 
            (session._c_object) \
382
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
 
        # ...do the normal thing
384
 
        return session.peer_certificate
385
 
    list_size = ctypes.c_uint()
386
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
 
        (session._c_object, ctypes.byref(list_size))
388
 
    if list_size.value == 0:
389
 
        return None
390
 
    cert = cert_list[0]
391
 
    return ctypes.string_at(cert.data, cert.size)
392
 
 
393
 
 
394
 
def fingerprint(openpgp):
395
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
 
    # New GnuTLS "datum" with the OpenPGP public key
397
 
    datum = gnutls.library.types.gnutls_datum_t\
398
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
399
 
                     ctypes.POINTER(ctypes.c_ubyte)),
400
 
         ctypes.c_uint(len(openpgp)))
401
 
    # New empty GnuTLS certificate
402
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
404
 
        (ctypes.byref(crt))
405
 
    # Import the OpenPGP public key into the certificate
406
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
407
 
                    (crt, ctypes.byref(datum),
408
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
 
    # New buffer for the fingerprint
410
 
    buffer = ctypes.create_string_buffer(20)
411
 
    buffer_length = ctypes.c_size_t()
412
 
    # Get the fingerprint from the certificate into the buffer
413
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
 
    # Deinit the certificate
416
 
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
 
    # Convert the buffer to a Python bytestring
418
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
419
 
    # Convert the bytestring to hexadecimal notation
420
 
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
 
    return hex_fpr
422
 
 
423
 
 
424
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
 
    """A TCP request handler class.
426
 
    Instantiated by IPv6_TCPServer for each request to handle it.
 
896
            return dbus.String(u"")
 
897
        return dbus.String(self._datetime_to_dbus(self
 
898
                                                  .last_checked_ok))
 
899
    
 
900
    # timeout - property
 
901
    @dbus_service_property(_interface, signature=u"t",
 
902
                           access=u"readwrite")
 
903
    def timeout_dbus_property(self, value=None):
 
904
        if value is None:       # get
 
905
            return dbus.UInt64(self.timeout_milliseconds())
 
906
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
907
        # Emit D-Bus signal
 
908
        self.PropertyChanged(dbus.String(u"timeout"),
 
909
                             dbus.UInt64(value, variant_level=1))
 
910
        if getattr(self, u"disable_initiator_tag", None) is None:
 
911
            return
 
912
        # Reschedule timeout
 
913
        gobject.source_remove(self.disable_initiator_tag)
 
914
        self.disable_initiator_tag = None
 
915
        time_to_die = (self.
 
916
                       _timedelta_to_milliseconds((self
 
917
                                                   .last_checked_ok
 
918
                                                   + self.timeout)
 
919
                                                  - datetime.datetime
 
920
                                                  .utcnow()))
 
921
        if time_to_die <= 0:
 
922
            # The timeout has passed
 
923
            self.disable()
 
924
        else:
 
925
            self.disable_initiator_tag = (gobject.timeout_add
 
926
                                          (time_to_die, self.disable))
 
927
    
 
928
    # interval - property
 
929
    @dbus_service_property(_interface, signature=u"t",
 
930
                           access=u"readwrite")
 
931
    def interval_dbus_property(self, value=None):
 
932
        if value is None:       # get
 
933
            return dbus.UInt64(self.interval_milliseconds())
 
934
        self.interval = datetime.timedelta(0, 0, 0, value)
 
935
        # Emit D-Bus signal
 
936
        self.PropertyChanged(dbus.String(u"interval"),
 
937
                             dbus.UInt64(value, variant_level=1))
 
938
        if getattr(self, u"checker_initiator_tag", None) is None:
 
939
            return
 
940
        # Reschedule checker run
 
941
        gobject.source_remove(self.checker_initiator_tag)
 
942
        self.checker_initiator_tag = (gobject.timeout_add
 
943
                                      (value, self.start_checker))
 
944
        self.start_checker()    # Start one now, too
 
945
 
 
946
    # checker - property
 
947
    @dbus_service_property(_interface, signature=u"s",
 
948
                           access=u"readwrite")
 
949
    def checker_dbus_property(self, value=None):
 
950
        if value is None:       # get
 
951
            return dbus.String(self.checker_command)
 
952
        self.checker_command = value
 
953
        # Emit D-Bus signal
 
954
        self.PropertyChanged(dbus.String(u"checker"),
 
955
                             dbus.String(self.checker_command,
 
956
                                         variant_level=1))
 
957
    
 
958
    # checker_running - property
 
959
    @dbus_service_property(_interface, signature=u"b",
 
960
                           access=u"readwrite")
 
961
    def checker_running_dbus_property(self, value=None):
 
962
        if value is None:       # get
 
963
            return dbus.Boolean(self.checker is not None)
 
964
        if value:
 
965
            self.start_checker()
 
966
        else:
 
967
            self.stop_checker()
 
968
    
 
969
    # object_path - property
 
970
    @dbus_service_property(_interface, signature=u"o", access=u"read")
 
971
    def object_path_dbus_property(self):
 
972
        return self.dbus_object_path # is already a dbus.ObjectPath
 
973
    
 
974
    # secret = property
 
975
    @dbus_service_property(_interface, signature=u"ay",
 
976
                           access=u"write", byte_arrays=True)
 
977
    def secret_dbus_property(self, value):
 
978
        self.secret = str(value)
 
979
    
 
980
    del _interface
 
981
 
 
982
 
 
983
class ClientHandler(socketserver.BaseRequestHandler, object):
 
984
    """A class to handle client connections.
 
985
    
 
986
    Instantiated once for each connection to handle it.
427
987
    Note: This will run in its own forked process."""
428
988
    
429
989
    def handle(self):
430
990
        logger.info(u"TCP connection from: %s",
431
 
                     unicode(self.client_address))
432
 
        session = gnutls.connection.ClientSession\
433
 
                  (self.request, gnutls.connection.X509Credentials())
434
 
        
435
 
        line = self.request.makefile().readline()
436
 
        logger.debug(u"Protocol version: %r", line)
437
 
        try:
438
 
            if int(line.strip().split()[0]) > 1:
439
 
                raise RuntimeError
440
 
        except (ValueError, IndexError, RuntimeError), error:
441
 
            logger.error(u"Unknown protocol version: %s", error)
442
 
            return
443
 
        
444
 
        # Note: gnutls.connection.X509Credentials is really a generic
445
 
        # GnuTLS certificate credentials object so long as no X.509
446
 
        # keys are added to it.  Therefore, we can use it here despite
447
 
        # using OpenPGP certificates.
448
 
        
449
 
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
 
        #                "+DHE-DSS"))
452
 
        priority = "NORMAL"             # Fallback default, since this
453
 
                                        # MUST be set.
454
 
        if self.server.settings["priority"]:
455
 
            priority = self.server.settings["priority"]
456
 
        gnutls.library.functions.gnutls_priority_set_direct\
457
 
            (session._c_object, priority, None);
458
 
        
459
 
        try:
460
 
            session.handshake()
461
 
        except gnutls.errors.GNUTLSError, error:
462
 
            logger.warning(u"Handshake failed: %s", error)
463
 
            # Do not run session.bye() here: the session is not
464
 
            # established.  Just abandon the request.
465
 
            return
466
 
        try:
467
 
            fpr = fingerprint(peer_certificate(session))
468
 
        except (TypeError, gnutls.errors.GNUTLSError), error:
469
 
            logger.warning(u"Bad certificate: %s", error)
470
 
            session.bye()
471
 
            return
472
 
        logger.debug(u"Fingerprint: %s", fpr)
473
 
        client = None
474
 
        for c in self.server.clients:
475
 
            if c.fingerprint == fpr:
476
 
                client = c
477
 
                break
478
 
        if not client:
479
 
            logger.warning(u"Client not found for fingerprint: %s",
480
 
                           fpr)
481
 
            session.bye()
482
 
            return
483
 
        # Have to check if client.still_valid(), since it is possible
484
 
        # that the client timed out while establishing the GnuTLS
485
 
        # session.
486
 
        if not client.still_valid():
487
 
            logger.warning(u"Client %(name)s is invalid",
488
 
                           vars(client))
489
 
            session.bye()
490
 
            return
491
 
        sent_size = 0
492
 
        while sent_size < len(client.secret):
493
 
            sent = session.send(client.secret[sent_size:])
494
 
            logger.debug(u"Sent: %d, remaining: %d",
495
 
                         sent, len(client.secret)
496
 
                         - (sent_size + sent))
497
 
            sent_size += sent
498
 
        session.bye()
499
 
 
500
 
 
501
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
991
                    unicode(self.client_address))
 
992
        logger.debug(u"IPC Pipe FD: %d", self.server.child_pipe[1])
 
993
        # Open IPC pipe to parent process
 
994
        with contextlib.nested(os.fdopen(self.server.child_pipe[1],
 
995
                                         u"w", 1),
 
996
                               os.fdopen(self.server.parent_pipe[0],
 
997
                                         u"r", 0)) as (ipc,
 
998
                                                       ipc_return):
 
999
            session = (gnutls.connection
 
1000
                       .ClientSession(self.request,
 
1001
                                      gnutls.connection
 
1002
                                      .X509Credentials()))
 
1003
            
 
1004
            line = self.request.makefile().readline()
 
1005
            logger.debug(u"Protocol version: %r", line)
 
1006
            try:
 
1007
                if int(line.strip().split()[0]) > 1:
 
1008
                    raise RuntimeError
 
1009
            except (ValueError, IndexError, RuntimeError), error:
 
1010
                logger.error(u"Unknown protocol version: %s", error)
 
1011
                return
 
1012
            
 
1013
            # Note: gnutls.connection.X509Credentials is really a
 
1014
            # generic GnuTLS certificate credentials object so long as
 
1015
            # no X.509 keys are added to it.  Therefore, we can use it
 
1016
            # here despite using OpenPGP certificates.
 
1017
            
 
1018
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
 
1019
            #                      u"+AES-256-CBC", u"+SHA1",
 
1020
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
 
1021
            #                      u"+DHE-DSS"))
 
1022
            # Use a fallback default, since this MUST be set.
 
1023
            priority = self.server.gnutls_priority
 
1024
            if priority is None:
 
1025
                priority = u"NORMAL"
 
1026
            (gnutls.library.functions
 
1027
             .gnutls_priority_set_direct(session._c_object,
 
1028
                                         priority, None))
 
1029
            
 
1030
            try:
 
1031
                session.handshake()
 
1032
            except gnutls.errors.GNUTLSError, error:
 
1033
                logger.warning(u"Handshake failed: %s", error)
 
1034
                # Do not run session.bye() here: the session is not
 
1035
                # established.  Just abandon the request.
 
1036
                return
 
1037
            logger.debug(u"Handshake succeeded")
 
1038
            try:
 
1039
                try:
 
1040
                    fpr = self.fingerprint(self.peer_certificate
 
1041
                                           (session))
 
1042
                except (TypeError, gnutls.errors.GNUTLSError), error:
 
1043
                    logger.warning(u"Bad certificate: %s", error)
 
1044
                    return
 
1045
                logger.debug(u"Fingerprint: %s", fpr)
 
1046
 
 
1047
                for c in self.server.clients:
 
1048
                    if c.fingerprint == fpr:
 
1049
                        client = c
 
1050
                        break
 
1051
                else:
 
1052
                    ipc.write(u"NOTFOUND %s %s\n"
 
1053
                              % (fpr, unicode(self.client_address)))
 
1054
                    return
 
1055
                # Have to check if client.enabled, since it is
 
1056
                # possible that the client was disabled since the
 
1057
                # GnuTLS session was established.
 
1058
                ipc.write(u"GETATTR enabled %s\n" % fpr)
 
1059
                enabled = pickle.load(ipc_return)
 
1060
                if not enabled:
 
1061
                    ipc.write(u"DISABLED %s\n" % client.name)
 
1062
                    return
 
1063
                ipc.write(u"SENDING %s\n" % client.name)
 
1064
                sent_size = 0
 
1065
                while sent_size < len(client.secret):
 
1066
                    sent = session.send(client.secret[sent_size:])
 
1067
                    logger.debug(u"Sent: %d, remaining: %d",
 
1068
                                 sent, len(client.secret)
 
1069
                                 - (sent_size + sent))
 
1070
                    sent_size += sent
 
1071
            finally:
 
1072
                session.bye()
 
1073
    
 
1074
    @staticmethod
 
1075
    def peer_certificate(session):
 
1076
        "Return the peer's OpenPGP certificate as a bytestring"
 
1077
        # If not an OpenPGP certificate...
 
1078
        if (gnutls.library.functions
 
1079
            .gnutls_certificate_type_get(session._c_object)
 
1080
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
1081
            # ...do the normal thing
 
1082
            return session.peer_certificate
 
1083
        list_size = ctypes.c_uint(1)
 
1084
        cert_list = (gnutls.library.functions
 
1085
                     .gnutls_certificate_get_peers
 
1086
                     (session._c_object, ctypes.byref(list_size)))
 
1087
        if not bool(cert_list) and list_size.value != 0:
 
1088
            raise gnutls.errors.GNUTLSError(u"error getting peer"
 
1089
                                            u" certificate")
 
1090
        if list_size.value == 0:
 
1091
            return None
 
1092
        cert = cert_list[0]
 
1093
        return ctypes.string_at(cert.data, cert.size)
 
1094
    
 
1095
    @staticmethod
 
1096
    def fingerprint(openpgp):
 
1097
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
 
1098
        # New GnuTLS "datum" with the OpenPGP public key
 
1099
        datum = (gnutls.library.types
 
1100
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
1101
                                             ctypes.POINTER
 
1102
                                             (ctypes.c_ubyte)),
 
1103
                                 ctypes.c_uint(len(openpgp))))
 
1104
        # New empty GnuTLS certificate
 
1105
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
1106
        (gnutls.library.functions
 
1107
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
1108
        # Import the OpenPGP public key into the certificate
 
1109
        (gnutls.library.functions
 
1110
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
1111
                                    gnutls.library.constants
 
1112
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
1113
        # Verify the self signature in the key
 
1114
        crtverify = ctypes.c_uint()
 
1115
        (gnutls.library.functions
 
1116
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
1117
                                         ctypes.byref(crtverify)))
 
1118
        if crtverify.value != 0:
 
1119
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1120
            raise (gnutls.errors.CertificateSecurityError
 
1121
                   (u"Verify failed"))
 
1122
        # New buffer for the fingerprint
 
1123
        buf = ctypes.create_string_buffer(20)
 
1124
        buf_len = ctypes.c_size_t()
 
1125
        # Get the fingerprint from the certificate into the buffer
 
1126
        (gnutls.library.functions
 
1127
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
1128
                                             ctypes.byref(buf_len)))
 
1129
        # Deinit the certificate
 
1130
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1131
        # Convert the buffer to a Python bytestring
 
1132
        fpr = ctypes.string_at(buf, buf_len.value)
 
1133
        # Convert the bytestring to hexadecimal notation
 
1134
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
1135
        return hex_fpr
 
1136
 
 
1137
 
 
1138
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
 
1139
    """Like socketserver.ForkingMixIn, but also pass a pipe pair."""
 
1140
    def process_request(self, request, client_address):
 
1141
        """Overrides and wraps the original process_request().
 
1142
        
 
1143
        This function creates a new pipe in self.pipe
 
1144
        """
 
1145
        self.child_pipe = os.pipe() # Child writes here
 
1146
        self.parent_pipe = os.pipe() # Parent writes here
 
1147
        super(ForkingMixInWithPipes,
 
1148
              self).process_request(request, client_address)
 
1149
        # Close unused ends for parent
 
1150
        os.close(self.parent_pipe[0]) # close read end
 
1151
        os.close(self.child_pipe[1])  # close write end
 
1152
        self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
 
1153
    def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
 
1154
        """Dummy function; override as necessary"""
 
1155
        os.close(child_pipe_fd)
 
1156
        os.close(parent_pipe_fd)
 
1157
 
 
1158
 
 
1159
class IPv6_TCPServer(ForkingMixInWithPipes,
 
1160
                     socketserver.TCPServer, object):
 
1161
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
1162
    
503
1163
    Attributes:
504
 
        settings:       Server settings
505
 
        clients:        Set() of Client objects
 
1164
        enabled:        Boolean; whether this server is activated yet
 
1165
        interface:      None or a network interface name (string)
 
1166
        use_ipv6:       Boolean; to use IPv6 or not
506
1167
    """
507
 
    address_family = socket.AF_INET6
508
 
    def __init__(self, *args, **kwargs):
509
 
        if "settings" in kwargs:
510
 
            self.settings = kwargs["settings"]
511
 
            del kwargs["settings"]
512
 
        if "clients" in kwargs:
513
 
            self.clients = kwargs["clients"]
514
 
            del kwargs["clients"]
515
 
        return super(type(self), self).__init__(*args, **kwargs)
 
1168
    def __init__(self, server_address, RequestHandlerClass,
 
1169
                 interface=None, use_ipv6=True):
 
1170
        self.interface = interface
 
1171
        if use_ipv6:
 
1172
            self.address_family = socket.AF_INET6
 
1173
        socketserver.TCPServer.__init__(self, server_address,
 
1174
                                        RequestHandlerClass)
516
1175
    def server_bind(self):
517
1176
        """This overrides the normal server_bind() function
518
1177
        to bind to an interface if one was specified, and also NOT to
519
1178
        bind to an address or port if they were not specified."""
520
 
        if self.settings["interface"]:
521
 
            # 25 is from /usr/include/asm-i486/socket.h
522
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
523
 
            try:
524
 
                self.socket.setsockopt(socket.SOL_SOCKET,
525
 
                                       SO_BINDTODEVICE,
526
 
                                       self.settings["interface"])
527
 
            except socket.error, error:
528
 
                if error[0] == errno.EPERM:
529
 
                    logger.error(u"No permission to"
530
 
                                 u" bind to interface %s",
531
 
                                 self.settings["interface"])
532
 
                else:
533
 
                    raise error
 
1179
        if self.interface is not None:
 
1180
            if SO_BINDTODEVICE is None:
 
1181
                logger.error(u"SO_BINDTODEVICE does not exist;"
 
1182
                             u" cannot bind to interface %s",
 
1183
                             self.interface)
 
1184
            else:
 
1185
                try:
 
1186
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
1187
                                           SO_BINDTODEVICE,
 
1188
                                           str(self.interface
 
1189
                                               + u'\0'))
 
1190
                except socket.error, error:
 
1191
                    if error[0] == errno.EPERM:
 
1192
                        logger.error(u"No permission to"
 
1193
                                     u" bind to interface %s",
 
1194
                                     self.interface)
 
1195
                    elif error[0] == errno.ENOPROTOOPT:
 
1196
                        logger.error(u"SO_BINDTODEVICE not available;"
 
1197
                                     u" cannot bind to interface %s",
 
1198
                                     self.interface)
 
1199
                    else:
 
1200
                        raise
534
1201
        # Only bind(2) the socket if we really need to.
535
1202
        if self.server_address[0] or self.server_address[1]:
536
1203
            if not self.server_address[0]:
537
 
                in6addr_any = "::"
538
 
                self.server_address = (in6addr_any,
 
1204
                if self.address_family == socket.AF_INET6:
 
1205
                    any_address = u"::" # in6addr_any
 
1206
                else:
 
1207
                    any_address = socket.INADDR_ANY
 
1208
                self.server_address = (any_address,
539
1209
                                       self.server_address[1])
540
1210
            elif not self.server_address[1]:
541
1211
                self.server_address = (self.server_address[0],
542
1212
                                       0)
543
 
#                 if self.settings["interface"]:
 
1213
#                 if self.interface:
544
1214
#                     self.server_address = (self.server_address[0],
545
1215
#                                            0, # port
546
1216
#                                            0, # flowinfo
547
1217
#                                            if_nametoindex
548
 
#                                            (self.settings
549
 
#                                             ["interface"]))
550
 
            return super(type(self), self).server_bind()
 
1218
#                                            (self.interface))
 
1219
            return socketserver.TCPServer.server_bind(self)
 
1220
 
 
1221
 
 
1222
class MandosServer(IPv6_TCPServer):
 
1223
    """Mandos server.
 
1224
    
 
1225
    Attributes:
 
1226
        clients:        set of Client objects
 
1227
        gnutls_priority GnuTLS priority string
 
1228
        use_dbus:       Boolean; to emit D-Bus signals or not
 
1229
    
 
1230
    Assumes a gobject.MainLoop event loop.
 
1231
    """
 
1232
    def __init__(self, server_address, RequestHandlerClass,
 
1233
                 interface=None, use_ipv6=True, clients=None,
 
1234
                 gnutls_priority=None, use_dbus=True):
 
1235
        self.enabled = False
 
1236
        self.clients = clients
 
1237
        if self.clients is None:
 
1238
            self.clients = set()
 
1239
        self.use_dbus = use_dbus
 
1240
        self.gnutls_priority = gnutls_priority
 
1241
        IPv6_TCPServer.__init__(self, server_address,
 
1242
                                RequestHandlerClass,
 
1243
                                interface = interface,
 
1244
                                use_ipv6 = use_ipv6)
 
1245
    def server_activate(self):
 
1246
        if self.enabled:
 
1247
            return socketserver.TCPServer.server_activate(self)
 
1248
    def enable(self):
 
1249
        self.enabled = True
 
1250
    def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
 
1251
        # Call "handle_ipc" for both data and EOF events
 
1252
        gobject.io_add_watch(child_pipe_fd,
 
1253
                             gobject.IO_IN | gobject.IO_HUP,
 
1254
                             functools.partial(self.handle_ipc,
 
1255
                                               reply_fd
 
1256
                                               =parent_pipe_fd))
 
1257
    def handle_ipc(self, source, condition, reply_fd=None,
 
1258
                   file_objects={}):
 
1259
        condition_names = {
 
1260
            gobject.IO_IN: u"IN",   # There is data to read.
 
1261
            gobject.IO_OUT: u"OUT", # Data can be written (without
 
1262
                                    # blocking).
 
1263
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
 
1264
            gobject.IO_ERR: u"ERR", # Error condition.
 
1265
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
 
1266
                                    # broken, usually for pipes and
 
1267
                                    # sockets).
 
1268
            }
 
1269
        conditions_string = ' | '.join(name
 
1270
                                       for cond, name in
 
1271
                                       condition_names.iteritems()
 
1272
                                       if cond & condition)
 
1273
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
 
1274
                     conditions_string)
 
1275
        
 
1276
        # Turn the pipe file descriptors into Python file objects
 
1277
        if source not in file_objects:
 
1278
            file_objects[source] = os.fdopen(source, u"r", 1)
 
1279
        if reply_fd not in file_objects:
 
1280
            file_objects[reply_fd] = os.fdopen(reply_fd, u"w", 0)
 
1281
        
 
1282
        # Read a line from the file object
 
1283
        cmdline = file_objects[source].readline()
 
1284
        if not cmdline:             # Empty line means end of file
 
1285
            # close the IPC pipes
 
1286
            file_objects[source].close()
 
1287
            del file_objects[source]
 
1288
            file_objects[reply_fd].close()
 
1289
            del file_objects[reply_fd]
 
1290
            
 
1291
            # Stop calling this function
 
1292
            return False
 
1293
        
 
1294
        logger.debug(u"IPC command: %r", cmdline)
 
1295
        
 
1296
        # Parse and act on command
 
1297
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
 
1298
        
 
1299
        if cmd == u"NOTFOUND":
 
1300
            fpr, address = args.split(None, 1)
 
1301
            logger.warning(u"Client not found for fingerprint: %s, ad"
 
1302
                           u"dress: %s", fpr, address)
 
1303
            if self.use_dbus:
 
1304
                # Emit D-Bus signal
 
1305
                mandos_dbus_service.ClientNotFound(fpr, address)
 
1306
        elif cmd == u"DISABLED":
 
1307
            for client in self.clients:
 
1308
                if client.name == args:
 
1309
                    logger.warning(u"Client %s is disabled", args)
 
1310
                    if self.use_dbus:
 
1311
                        # Emit D-Bus signal
 
1312
                        client.Rejected()
 
1313
                    break
 
1314
            else:
 
1315
                logger.error(u"Unknown client %s is disabled", args)
 
1316
        elif cmd == u"SENDING":
 
1317
            for client in self.clients:
 
1318
                if client.name == args:
 
1319
                    logger.info(u"Sending secret to %s", client.name)
 
1320
                    client.checked_ok()
 
1321
                    if self.use_dbus:
 
1322
                        # Emit D-Bus signal
 
1323
                        client.GotSecret()
 
1324
                    break
 
1325
            else:
 
1326
                logger.error(u"Sending secret to unknown client %s",
 
1327
                             args)
 
1328
        elif cmd == u"GETATTR":
 
1329
            attr_name, fpr = args.split(None, 1)
 
1330
            for client in self.clients:
 
1331
                if client.fingerprint == fpr:
 
1332
                    attr_value = getattr(client, attr_name, None)
 
1333
                    logger.debug("IPC reply: %r", attr_value)
 
1334
                    pickle.dump(attr_value, file_objects[reply_fd])
 
1335
                    break
 
1336
            else:
 
1337
                logger.error(u"Client %s on address %s requesting "
 
1338
                             u"attribute %s not found", fpr, address,
 
1339
                             attr_name)
 
1340
                pickle.dump(None, file_objects[reply_fd])
 
1341
        else:
 
1342
            logger.error(u"Unknown IPC command: %r", cmdline)
 
1343
        
 
1344
        # Keep calling this function
 
1345
        return True
551
1346
 
552
1347
 
553
1348
def string_to_delta(interval):
554
1349
    """Parse a string and return a datetime.timedelta
555
 
 
556
 
    >>> string_to_delta('7d')
 
1350
    
 
1351
    >>> string_to_delta(u'7d')
557
1352
    datetime.timedelta(7)
558
 
    >>> string_to_delta('60s')
 
1353
    >>> string_to_delta(u'60s')
559
1354
    datetime.timedelta(0, 60)
560
 
    >>> string_to_delta('60m')
 
1355
    >>> string_to_delta(u'60m')
561
1356
    datetime.timedelta(0, 3600)
562
 
    >>> string_to_delta('24h')
 
1357
    >>> string_to_delta(u'24h')
563
1358
    datetime.timedelta(1)
564
1359
    >>> string_to_delta(u'1w')
565
1360
    datetime.timedelta(7)
 
1361
    >>> string_to_delta(u'5m 30s')
 
1362
    datetime.timedelta(0, 330)
566
1363
    """
567
 
    try:
568
 
        suffix=unicode(interval[-1])
569
 
        value=int(interval[:-1])
570
 
        if suffix == u"d":
571
 
            delta = datetime.timedelta(value)
572
 
        elif suffix == u"s":
573
 
            delta = datetime.timedelta(0, value)
574
 
        elif suffix == u"m":
575
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
576
 
        elif suffix == u"h":
577
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
 
        elif suffix == u"w":
579
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
 
        else:
581
 
            raise ValueError
582
 
    except (ValueError, IndexError):
583
 
        raise ValueError
584
 
    return delta
585
 
 
586
 
 
587
 
def server_state_changed(state):
588
 
    """Derived from the Avahi example code"""
589
 
    if state == avahi.SERVER_COLLISION:
590
 
        logger.error(u"Server name collision")
591
 
        service.remove()
592
 
    elif state == avahi.SERVER_RUNNING:
593
 
        service.add()
594
 
 
595
 
 
596
 
def entry_group_state_changed(state, error):
597
 
    """Derived from the Avahi example code"""
598
 
    logger.debug(u"state change: %i", state)
599
 
    
600
 
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
 
        logger.debug(u"Service established.")
602
 
    elif state == avahi.ENTRY_GROUP_COLLISION:
603
 
        logger.warning(u"Service name collision.")
604
 
        service.rename()
605
 
    elif state == avahi.ENTRY_GROUP_FAILURE:
606
 
        logger.critical(u"Error in group state changed %s",
607
 
                        unicode(error))
608
 
        raise AvahiGroupError("State changed: %s", str(error))
 
1364
    timevalue = datetime.timedelta(0)
 
1365
    for s in interval.split():
 
1366
        try:
 
1367
            suffix = unicode(s[-1])
 
1368
            value = int(s[:-1])
 
1369
            if suffix == u"d":
 
1370
                delta = datetime.timedelta(value)
 
1371
            elif suffix == u"s":
 
1372
                delta = datetime.timedelta(0, value)
 
1373
            elif suffix == u"m":
 
1374
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
1375
            elif suffix == u"h":
 
1376
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
1377
            elif suffix == u"w":
 
1378
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
1379
            else:
 
1380
                raise ValueError(u"Unknown suffix %r" % suffix)
 
1381
        except (ValueError, IndexError), e:
 
1382
            raise ValueError(e.message)
 
1383
        timevalue += delta
 
1384
    return timevalue
 
1385
 
609
1386
 
610
1387
def if_nametoindex(interface):
611
 
    """Call the C function if_nametoindex(), or equivalent"""
 
1388
    """Call the C function if_nametoindex(), or equivalent
 
1389
    
 
1390
    Note: This function cannot accept a unicode string."""
612
1391
    global if_nametoindex
613
1392
    try:
614
 
        if "ctypes.util" not in sys.modules:
615
 
            import ctypes.util
616
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
617
 
            (ctypes.util.find_library("c")).if_nametoindex
 
1393
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
1394
                          (ctypes.util.find_library(u"c"))
 
1395
                          .if_nametoindex)
618
1396
    except (OSError, AttributeError):
619
 
        if "struct" not in sys.modules:
620
 
            import struct
621
 
        if "fcntl" not in sys.modules:
622
 
            import fcntl
 
1397
        logger.warning(u"Doing if_nametoindex the hard way")
623
1398
        def if_nametoindex(interface):
624
1399
            "Get an interface index the hard way, i.e. using fcntl()"
625
1400
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
626
 
            s = socket.socket()
627
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
 
                                struct.pack("16s16x", interface))
629
 
            s.close()
630
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
1401
            with contextlib.closing(socket.socket()) as s:
 
1402
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
1403
                                    struct.pack(str(u"16s16x"),
 
1404
                                                interface))
 
1405
            interface_index = struct.unpack(str(u"I"),
 
1406
                                            ifreq[16:20])[0]
631
1407
            return interface_index
632
1408
    return if_nametoindex(interface)
633
1409
 
634
1410
 
635
1411
def daemon(nochdir = False, noclose = False):
636
1412
    """See daemon(3).  Standard BSD Unix function.
 
1413
    
637
1414
    This should really exist as os.daemon, but it doesn't (yet)."""
638
1415
    if os.fork():
639
1416
        sys.exit()
640
1417
    os.setsid()
641
1418
    if not nochdir:
642
 
        os.chdir("/")
 
1419
        os.chdir(u"/")
643
1420
    if os.fork():
644
1421
        sys.exit()
645
1422
    if not noclose:
647
1424
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
648
1425
        if not stat.S_ISCHR(os.fstat(null).st_mode):
649
1426
            raise OSError(errno.ENODEV,
650
 
                          "/dev/null not a character device")
 
1427
                          u"%s not a character device"
 
1428
                          % os.path.devnull)
651
1429
        os.dup2(null, sys.stdin.fileno())
652
1430
        os.dup2(null, sys.stdout.fileno())
653
1431
        os.dup2(null, sys.stderr.fileno())
656
1434
 
657
1435
 
658
1436
def main():
659
 
    global main_loop_started
660
 
    main_loop_started = False
661
 
    
662
 
    parser = OptionParser(version = "%%prog %s" % version)
663
 
    parser.add_option("-i", "--interface", type="string",
664
 
                      metavar="IF", help="Bind to interface IF")
665
 
    parser.add_option("-a", "--address", type="string",
666
 
                      help="Address to listen for requests on")
667
 
    parser.add_option("-p", "--port", type="int",
668
 
                      help="Port number to receive requests on")
669
 
    parser.add_option("--check", action="store_true", default=False,
670
 
                      help="Run self-test")
671
 
    parser.add_option("--debug", action="store_true",
672
 
                      help="Debug mode; run in foreground and log to"
673
 
                      " terminal")
674
 
    parser.add_option("--priority", type="string", help="GnuTLS"
675
 
                      " priority string (see GnuTLS documentation)")
676
 
    parser.add_option("--servicename", type="string", metavar="NAME",
677
 
                      help="Zeroconf service name")
678
 
    parser.add_option("--configdir", type="string",
679
 
                      default="/etc/mandos", metavar="DIR",
680
 
                      help="Directory to search for configuration"
681
 
                      " files")
682
 
    (options, args) = parser.parse_args()
 
1437
    
 
1438
    ##################################################################
 
1439
    # Parsing of options, both command line and config file
 
1440
    
 
1441
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
1442
    parser.add_option("-i", u"--interface", type=u"string",
 
1443
                      metavar="IF", help=u"Bind to interface IF")
 
1444
    parser.add_option("-a", u"--address", type=u"string",
 
1445
                      help=u"Address to listen for requests on")
 
1446
    parser.add_option("-p", u"--port", type=u"int",
 
1447
                      help=u"Port number to receive requests on")
 
1448
    parser.add_option("--check", action=u"store_true",
 
1449
                      help=u"Run self-test")
 
1450
    parser.add_option("--debug", action=u"store_true",
 
1451
                      help=u"Debug mode; run in foreground and log to"
 
1452
                      u" terminal")
 
1453
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
 
1454
                      u" priority string (see GnuTLS documentation)")
 
1455
    parser.add_option("--servicename", type=u"string",
 
1456
                      metavar=u"NAME", help=u"Zeroconf service name")
 
1457
    parser.add_option("--configdir", type=u"string",
 
1458
                      default=u"/etc/mandos", metavar=u"DIR",
 
1459
                      help=u"Directory to search for configuration"
 
1460
                      u" files")
 
1461
    parser.add_option("--no-dbus", action=u"store_false",
 
1462
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
 
1463
                      u" system bus interface")
 
1464
    parser.add_option("--no-ipv6", action=u"store_false",
 
1465
                      dest=u"use_ipv6", help=u"Do not use IPv6")
 
1466
    options = parser.parse_args()[0]
683
1467
    
684
1468
    if options.check:
685
1469
        import doctest
687
1471
        sys.exit()
688
1472
    
689
1473
    # Default values for config file for server-global settings
690
 
    server_defaults = { "interface": "",
691
 
                        "address": "",
692
 
                        "port": "",
693
 
                        "debug": "False",
694
 
                        "priority":
695
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
696
 
                        "servicename": "Mandos",
 
1474
    server_defaults = { u"interface": u"",
 
1475
                        u"address": u"",
 
1476
                        u"port": u"",
 
1477
                        u"debug": u"False",
 
1478
                        u"priority":
 
1479
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
1480
                        u"servicename": u"Mandos",
 
1481
                        u"use_dbus": u"True",
 
1482
                        u"use_ipv6": u"True",
697
1483
                        }
698
1484
    
699
1485
    # Parse config file for server-global settings
700
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
1486
    server_config = configparser.SafeConfigParser(server_defaults)
701
1487
    del server_defaults
702
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
1488
    server_config.read(os.path.join(options.configdir,
 
1489
                                    u"mandos.conf"))
703
1490
    # Convert the SafeConfigParser object to a dict
704
1491
    server_settings = server_config.defaults()
705
 
    # Use getboolean on the boolean config option
706
 
    server_settings["debug"] = server_config.getboolean\
707
 
                               ("DEFAULT", "debug")
 
1492
    # Use the appropriate methods on the non-string config options
 
1493
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
 
1494
        server_settings[option] = server_config.getboolean(u"DEFAULT",
 
1495
                                                           option)
 
1496
    if server_settings["port"]:
 
1497
        server_settings["port"] = server_config.getint(u"DEFAULT",
 
1498
                                                       u"port")
708
1499
    del server_config
709
1500
    
710
1501
    # Override the settings from the config file with command line
711
1502
    # options, if set.
712
 
    for option in ("interface", "address", "port", "debug",
713
 
                   "priority", "servicename", "configdir"):
 
1503
    for option in (u"interface", u"address", u"port", u"debug",
 
1504
                   u"priority", u"servicename", u"configdir",
 
1505
                   u"use_dbus", u"use_ipv6"):
714
1506
        value = getattr(options, option)
715
1507
        if value is not None:
716
1508
            server_settings[option] = value
717
1509
    del options
 
1510
    # Force all strings to be unicode
 
1511
    for option in server_settings.keys():
 
1512
        if type(server_settings[option]) is str:
 
1513
            server_settings[option] = unicode(server_settings[option])
718
1514
    # Now we have our good server settings in "server_settings"
719
1515
    
720
 
    debug = server_settings["debug"]
 
1516
    ##################################################################
 
1517
    
 
1518
    # For convenience
 
1519
    debug = server_settings[u"debug"]
 
1520
    use_dbus = server_settings[u"use_dbus"]
 
1521
    use_ipv6 = server_settings[u"use_ipv6"]
721
1522
    
722
1523
    if not debug:
723
1524
        syslogger.setLevel(logging.WARNING)
724
1525
        console.setLevel(logging.WARNING)
725
1526
    
726
 
    if server_settings["servicename"] != "Mandos":
727
 
        syslogger.setFormatter(logging.Formatter\
728
 
                               ('Mandos (%s): %%(levelname)s:'
729
 
                                ' %%(message)s'
730
 
                                % server_settings["servicename"]))
 
1527
    if server_settings[u"servicename"] != u"Mandos":
 
1528
        syslogger.setFormatter(logging.Formatter
 
1529
                               (u'Mandos (%s) [%%(process)d]:'
 
1530
                                u' %%(levelname)s: %%(message)s'
 
1531
                                % server_settings[u"servicename"]))
731
1532
    
732
1533
    # Parse config file with clients
733
 
    client_defaults = { "timeout": "1h",
734
 
                        "interval": "5m",
735
 
                        "checker": "fping -q -- %%(host)s",
 
1534
    client_defaults = { u"timeout": u"1h",
 
1535
                        u"interval": u"5m",
 
1536
                        u"checker": u"fping -q -- %%(host)s",
 
1537
                        u"host": u"",
736
1538
                        }
737
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
738
 
    client_config.read(os.path.join(server_settings["configdir"],
739
 
                                    "clients.conf"))
740
 
    
741
 
    global service
742
 
    service = AvahiService(name = server_settings["servicename"],
743
 
                           type = "_mandos._tcp", );
744
 
    if server_settings["interface"]:
745
 
        service.interface = if_nametoindex(server_settings["interface"])
 
1539
    client_config = configparser.SafeConfigParser(client_defaults)
 
1540
    client_config.read(os.path.join(server_settings[u"configdir"],
 
1541
                                    u"clients.conf"))
 
1542
    
 
1543
    global mandos_dbus_service
 
1544
    mandos_dbus_service = None
 
1545
    
 
1546
    tcp_server = MandosServer((server_settings[u"address"],
 
1547
                               server_settings[u"port"]),
 
1548
                              ClientHandler,
 
1549
                              interface=server_settings[u"interface"],
 
1550
                              use_ipv6=use_ipv6,
 
1551
                              gnutls_priority=
 
1552
                              server_settings[u"priority"],
 
1553
                              use_dbus=use_dbus)
 
1554
    pidfilename = u"/var/run/mandos.pid"
 
1555
    try:
 
1556
        pidfile = open(pidfilename, u"w")
 
1557
    except IOError:
 
1558
        logger.error(u"Could not open file %r", pidfilename)
 
1559
    
 
1560
    try:
 
1561
        uid = pwd.getpwnam(u"_mandos").pw_uid
 
1562
        gid = pwd.getpwnam(u"_mandos").pw_gid
 
1563
    except KeyError:
 
1564
        try:
 
1565
            uid = pwd.getpwnam(u"mandos").pw_uid
 
1566
            gid = pwd.getpwnam(u"mandos").pw_gid
 
1567
        except KeyError:
 
1568
            try:
 
1569
                uid = pwd.getpwnam(u"nobody").pw_uid
 
1570
                gid = pwd.getpwnam(u"nobody").pw_gid
 
1571
            except KeyError:
 
1572
                uid = 65534
 
1573
                gid = 65534
 
1574
    try:
 
1575
        os.setgid(gid)
 
1576
        os.setuid(uid)
 
1577
    except OSError, error:
 
1578
        if error[0] != errno.EPERM:
 
1579
            raise error
 
1580
    
 
1581
    # Enable all possible GnuTLS debugging
 
1582
    if debug:
 
1583
        # "Use a log level over 10 to enable all debugging options."
 
1584
        # - GnuTLS manual
 
1585
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
1586
        
 
1587
        @gnutls.library.types.gnutls_log_func
 
1588
        def debug_gnutls(level, string):
 
1589
            logger.debug(u"GnuTLS: %s", string[:-1])
 
1590
        
 
1591
        (gnutls.library.functions
 
1592
         .gnutls_global_set_log_function(debug_gnutls))
746
1593
    
747
1594
    global main_loop
748
 
    global bus
749
 
    global server
750
1595
    # From the Avahi example code
751
1596
    DBusGMainLoop(set_as_default=True )
752
1597
    main_loop = gobject.MainLoop()
753
1598
    bus = dbus.SystemBus()
754
 
    server = dbus.Interface(
755
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
 
            avahi.DBUS_INTERFACE_SERVER )
757
1599
    # End of Avahi example code
758
 
    
759
 
    clients = Set()
760
 
    def remove_from_clients(client):
761
 
        clients.remove(client)
762
 
        if not clients:
763
 
            logger.critical(u"No clients left, exiting")
764
 
            sys.exit()
765
 
    
766
 
    clients.update(Set(Client(name = section,
767
 
                              stop_hook = remove_from_clients,
768
 
                              config
769
 
                              = dict(client_config.items(section)))
770
 
                       for section in client_config.sections()))
771
 
    if not clients:
772
 
        logger.critical(u"No clients defined")
773
 
        sys.exit(1)
774
 
    
775
 
    if not debug:
 
1600
    if use_dbus:
 
1601
        try:
 
1602
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
 
1603
                                            bus, do_not_queue=True)
 
1604
        except dbus.exceptions.NameExistsException, e:
 
1605
            logger.error(unicode(e) + u", disabling D-Bus")
 
1606
            use_dbus = False
 
1607
            server_settings[u"use_dbus"] = False
 
1608
            tcp_server.use_dbus = False
 
1609
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
1610
    service = AvahiService(name = server_settings[u"servicename"],
 
1611
                           servicetype = u"_mandos._tcp",
 
1612
                           protocol = protocol, bus = bus)
 
1613
    if server_settings["interface"]:
 
1614
        service.interface = (if_nametoindex
 
1615
                             (str(server_settings[u"interface"])))
 
1616
    
 
1617
    client_class = Client
 
1618
    if use_dbus:
 
1619
        client_class = functools.partial(ClientDBus, bus = bus)
 
1620
    tcp_server.clients.update(set(
 
1621
            client_class(name = section,
 
1622
                         config= dict(client_config.items(section)))
 
1623
            for section in client_config.sections()))
 
1624
    if not tcp_server.clients:
 
1625
        logger.warning(u"No clients defined")
 
1626
    
 
1627
    if debug:
 
1628
        # Redirect stdin so all checkers get /dev/null
 
1629
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1630
        os.dup2(null, sys.stdin.fileno())
 
1631
        if null > 2:
 
1632
            os.close(null)
 
1633
    else:
 
1634
        # No console logging
776
1635
        logger.removeHandler(console)
 
1636
        # Close all input and output, do double fork, etc.
777
1637
        daemon()
778
1638
    
779
 
    pidfilename = "/var/run/mandos/mandos.pid"
780
 
    pid = os.getpid()
781
1639
    try:
782
 
        pidfile = open(pidfilename, "w")
783
 
        pidfile.write(str(pid) + "\n")
784
 
        pidfile.close()
 
1640
        with pidfile:
 
1641
            pid = os.getpid()
 
1642
            pidfile.write(str(pid) + "\n")
785
1643
        del pidfile
786
 
    except IOError, err:
787
 
        logger.error(u"Could not write %s file with PID %d",
788
 
                     pidfilename, os.getpid())
 
1644
    except IOError:
 
1645
        logger.error(u"Could not write to file %r with PID %d",
 
1646
                     pidfilename, pid)
 
1647
    except NameError:
 
1648
        # "pidfile" was never created
 
1649
        pass
 
1650
    del pidfilename
 
1651
    
 
1652
    if not debug:
 
1653
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
1654
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
1655
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
1656
    
 
1657
    if use_dbus:
 
1658
        class MandosDBusService(dbus.service.Object):
 
1659
            """A D-Bus proxy object"""
 
1660
            def __init__(self):
 
1661
                dbus.service.Object.__init__(self, bus, u"/")
 
1662
            _interface = u"se.bsnet.fukt.Mandos"
 
1663
            
 
1664
            @dbus.service.signal(_interface, signature=u"o")
 
1665
            def ClientAdded(self, objpath):
 
1666
                "D-Bus signal"
 
1667
                pass
 
1668
            
 
1669
            @dbus.service.signal(_interface, signature=u"ss")
 
1670
            def ClientNotFound(self, fingerprint, address):
 
1671
                "D-Bus signal"
 
1672
                pass
 
1673
            
 
1674
            @dbus.service.signal(_interface, signature=u"os")
 
1675
            def ClientRemoved(self, objpath, name):
 
1676
                "D-Bus signal"
 
1677
                pass
 
1678
            
 
1679
            @dbus.service.method(_interface, out_signature=u"ao")
 
1680
            def GetAllClients(self):
 
1681
                "D-Bus method"
 
1682
                return dbus.Array(c.dbus_object_path
 
1683
                                  for c in tcp_server.clients)
 
1684
            
 
1685
            @dbus.service.method(_interface,
 
1686
                                 out_signature=u"a{oa{sv}}")
 
1687
            def GetAllClientsWithProperties(self):
 
1688
                "D-Bus method"
 
1689
                return dbus.Dictionary(
 
1690
                    ((c.dbus_object_path, c.GetAll(u""))
 
1691
                     for c in tcp_server.clients),
 
1692
                    signature=u"oa{sv}")
 
1693
            
 
1694
            @dbus.service.method(_interface, in_signature=u"o")
 
1695
            def RemoveClient(self, object_path):
 
1696
                "D-Bus method"
 
1697
                for c in tcp_server.clients:
 
1698
                    if c.dbus_object_path == object_path:
 
1699
                        tcp_server.clients.remove(c)
 
1700
                        c.remove_from_connection()
 
1701
                        # Don't signal anything except ClientRemoved
 
1702
                        c.disable(quiet=True)
 
1703
                        # Emit D-Bus signal
 
1704
                        self.ClientRemoved(object_path, c.name)
 
1705
                        return
 
1706
                raise KeyError(object_path)
 
1707
            
 
1708
            del _interface
 
1709
        
 
1710
        mandos_dbus_service = MandosDBusService()
789
1711
    
790
1712
    def cleanup():
791
1713
        "Cleanup function; run on exit"
792
 
        global group
793
 
        # From the Avahi example code
794
 
        if not group is None:
795
 
            group.Free()
796
 
            group = None
797
 
        # End of Avahi example code
 
1714
        service.cleanup()
798
1715
        
799
 
        while clients:
800
 
            client = clients.pop()
801
 
            client.stop_hook = None
802
 
            client.stop()
 
1716
        while tcp_server.clients:
 
1717
            client = tcp_server.clients.pop()
 
1718
            if use_dbus:
 
1719
                client.remove_from_connection()
 
1720
            client.disable_hook = None
 
1721
            # Don't signal anything except ClientRemoved
 
1722
            client.disable(quiet=True)
 
1723
            if use_dbus:
 
1724
                # Emit D-Bus signal
 
1725
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
 
1726
                                                  client.name)
803
1727
    
804
1728
    atexit.register(cleanup)
805
1729
    
806
 
    if not debug:
807
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
808
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
 
    
811
 
    for client in clients:
812
 
        client.start()
813
 
    
814
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
815
 
                                 server_settings["port"]),
816
 
                                tcp_handler,
817
 
                                settings=server_settings,
818
 
                                clients=clients)
 
1730
    for client in tcp_server.clients:
 
1731
        if use_dbus:
 
1732
            # Emit D-Bus signal
 
1733
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
1734
        client.enable()
 
1735
    
 
1736
    tcp_server.enable()
 
1737
    tcp_server.server_activate()
 
1738
    
819
1739
    # Find out what port we got
820
1740
    service.port = tcp_server.socket.getsockname()[1]
821
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
1741
    if use_ipv6:
 
1742
        logger.info(u"Now listening on address %r, port %d,"
 
1743
                    " flowinfo %d, scope_id %d"
 
1744
                    % tcp_server.socket.getsockname())
 
1745
    else:                       # IPv4
 
1746
        logger.info(u"Now listening on address %r, port %d"
 
1747
                    % tcp_server.socket.getsockname())
823
1748
    
824
1749
    #service.interface = tcp_server.socket.getsockname()[3]
825
1750
    
826
1751
    try:
827
1752
        # From the Avahi example code
828
 
        server.connect_to_signal("StateChanged", server_state_changed)
829
1753
        try:
830
 
            server_state_changed(server.GetState())
 
1754
            service.activate()
831
1755
        except dbus.exceptions.DBusException, error:
832
1756
            logger.critical(u"DBusException: %s", error)
 
1757
            cleanup()
833
1758
            sys.exit(1)
834
1759
        # End of Avahi example code
835
1760
        
836
1761
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
1762
                             lambda *args, **kwargs:
838
 
                             tcp_server.handle_request\
839
 
                             (*args[2:], **kwargs) or True)
 
1763
                             (tcp_server.handle_request
 
1764
                              (*args[2:], **kwargs) or True))
840
1765
        
841
1766
        logger.debug(u"Starting main loop")
842
 
        main_loop_started = True
843
1767
        main_loop.run()
844
1768
    except AvahiError, error:
845
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
1769
        logger.critical(u"AvahiError: %s", error)
 
1770
        cleanup()
846
1771
        sys.exit(1)
847
1772
    except KeyboardInterrupt:
848
1773
        if debug:
849
 
            print
 
1774
            print >> sys.stderr
 
1775
        logger.debug(u"Server received KeyboardInterrupt")
 
1776
    logger.debug(u"Server exiting")
 
1777
    # Must run before the D-Bus bus name gets deregistered
 
1778
    cleanup()
850
1779
 
851
1780
if __name__ == '__main__':
852
1781
    main()