/mandos/release

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

« back to all changes in this revision

Viewing changes to server.py

  • Committer: Björn Påhlsson
  • Date: 2008-07-20 02:52:20 UTC
  • Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
       Avahi instead of udp server discovery
       openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server

Show diffs side-by-side

added added

removed removed

Lines of Context:
1
1
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
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
 
13
 
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@fukt.bsnet.se>.
32
 
33
 
 
34
 
from __future__ import division, with_statement, absolute_import
35
 
 
36
 
import SocketServer as socketserver
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
37
6
import socket
38
 
import optparse
 
7
import select
 
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
44
14
import gnutls.library.functions
45
15
import gnutls.library.constants
46
16
import gnutls.library.types
47
 
import ConfigParser as configparser
 
17
import ConfigParser
48
18
import sys
49
19
import re
50
20
import os
51
21
import signal
 
22
from sets import Set
52
23
import subprocess
53
 
import atexit
54
 
import stat
55
 
import logging
56
 
import logging.handlers
57
 
import pwd
58
 
import contextlib
59
 
import struct
60
 
import fcntl
61
 
import functools
62
 
import cPickle as pickle
63
24
 
64
25
import dbus
65
 
import dbus.service
66
26
import gobject
67
27
import avahi
68
28
from dbus.mainloop.glib import DBusGMainLoop
69
29
import ctypes
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'))
92
 
logger.addHandler(syslogger)
93
 
 
94
 
console = logging.StreamHandler()
95
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
 
                                       u' %(levelname)s:'
97
 
                                       u' %(message)s'))
98
 
logger.addHandler(console)
99
 
 
100
 
class AvahiError(Exception):
101
 
    def __init__(self, value, *args, **kwargs):
102
 
        self.value = value
103
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
104
 
    def __unicode__(self):
105
 
        return unicode(repr(self.value))
106
 
 
107
 
class AvahiServiceError(AvahiError):
108
 
    pass
109
 
 
110
 
class AvahiGroupError(AvahiError):
111
 
    pass
112
 
 
113
 
 
114
 
class AvahiService(object):
115
 
    """An Avahi (Zeroconf) service.
116
 
    
117
 
    Attributes:
118
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
119
 
               Used to optionally bind to the specified interface.
120
 
    name: string; Example: u'Mandos'
121
 
    type: string; Example: u'_mandos._tcp'.
122
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
123
 
    port: integer; what port to announce
124
 
    TXT: list of strings; TXT record for the service
125
 
    domain: string; Domain to publish on, default to .local if empty.
126
 
    host: string; Host to publish records for, default is localhost
127
 
    max_renames: integer; maximum number of renames
128
 
    rename_count: integer; counter so we only rename after collisions
129
 
                  a sensible number of times
130
 
    group: D-Bus Entry Group
131
 
    server: D-Bus Server
132
 
    bus: dbus.SystemBus()
133
 
    """
134
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
 
                 servicetype = None, port = None, TXT = None,
136
 
                 domain = u"", host = u"", max_renames = 32768,
137
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
138
 
        self.interface = interface
139
 
        self.name = name
140
 
        self.type = servicetype
141
 
        self.port = port
142
 
        self.TXT = TXT if TXT is not None else []
143
 
        self.domain = domain
144
 
        self.host = host
145
 
        self.rename_count = 0
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
151
 
    def rename(self):
152
 
        """Derived from the Avahi example code"""
153
 
        if self.rename_count >= self.max_renames:
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))
165
 
        self.remove()
166
 
        self.add()
167
 
        self.rename_count += 1
168
 
    def remove(self):
169
 
        """Derived from the Avahi example code"""
170
 
        if self.group is not None:
171
 
            self.group.Reset()
172
 
    def add(self):
173
 
        """Derived from the 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())
 
30
 
 
31
import logging
 
32
import logging.handlers
 
33
 
 
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
 
35
 
 
36
logger = logging.Logger('mandos')
 
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
 
38
 
 
39
# This variable is used to optionally bind to a specified interface.
 
40
# It is a global variable to fit in with the other variables from the
 
41
# Avahi server example code.
 
42
serviceInterface = avahi.IF_UNSPEC
 
43
# From the Avahi server example code:
 
44
serviceName = "Mandos"
 
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
46
servicePort = None                      # Not known at startup
 
47
serviceTXT = []                         # TXT record for the service
 
48
domain = ""                  # Domain to publish on, default to .local
 
49
host = ""          # Host to publish records for, default to localhost
 
50
group = None #our entry group
 
51
rename_count = 12       # Counter so we only rename after collisions a
 
52
                        # sensible number of times
 
53
# End of Avahi example code
229
54
 
230
55
 
231
56
class Client(object):
232
57
    """A representation of a client host served by this server.
233
 
    
234
58
    Attributes:
235
 
    name:       string; from the config file, used in log messages and
236
 
                        D-Bus identifiers
 
59
    name:      string; from the config file, used in log messages
237
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
238
61
                 uniquely identify the client
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.
 
62
    secret:    bytestring; sent verbatim (over TLS) to client
 
63
    fqdn:      string (FQDN); available for use by the checker command
 
64
    created:   datetime.datetime()
 
65
    last_seen: datetime.datetime() or None if not yet seen
 
66
    timeout:   datetime.timedelta(); How long from last_seen until
 
67
                                     this client is invalid
 
68
    interval:  datetime.timedelta(); How often to start a new checker
 
69
    stop_hook: If set, called by stop() as stop_hook(self)
 
70
    checker:   subprocess.Popen(); a running checker process used
 
71
                                   to see if the client lives.
 
72
                                   Is None if no process is running.
252
73
    checker_initiator_tag: a gobject event source tag, or None
253
 
    disable_initiator_tag: - '' -
 
74
    stop_initiator_tag:    - '' -
254
75
    checker_callback_tag:  - '' -
255
76
    checker_command: string; External command which is run to check if
256
 
                     client lives.  %() expansions are done at
 
77
                     client lives.  %()s expansions are done at
257
78
                     runtime with vars(self) as dict, so that for
258
79
                     instance %(name)s can be used in the command.
259
 
    current_checker_command: string; current running checker_command
 
80
    Private attibutes:
 
81
    _timeout: Real variable for 'timeout'
 
82
    _interval: Real variable for 'interval'
 
83
    _timeout_milliseconds: Used by gobject.timeout_add()
 
84
    _interval_milliseconds: - '' -
260
85
    """
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):
278
 
        """Note: the 'checker' key in 'config' sets the
279
 
        'checker_command' attribute and *not* the 'checker'
280
 
        attribute."""
 
86
    def _set_timeout(self, timeout):
 
87
        "Setter function for 'timeout' attribute"
 
88
        self._timeout = timeout
 
89
        self._timeout_milliseconds = ((self.timeout.days
 
90
                                       * 24 * 60 * 60 * 1000)
 
91
                                      + (self.timeout.seconds * 1000)
 
92
                                      + (self.timeout.microseconds
 
93
                                         // 1000))
 
94
    timeout = property(lambda self: self._timeout,
 
95
                       _set_timeout)
 
96
    del _set_timeout
 
97
    def _set_interval(self, interval):
 
98
        "Setter function for 'interval' attribute"
 
99
        self._interval = interval
 
100
        self._interval_milliseconds = ((self.interval.days
 
101
                                        * 24 * 60 * 60 * 1000)
 
102
                                       + (self.interval.seconds
 
103
                                          * 1000)
 
104
                                       + (self.interval.microseconds
 
105
                                          // 1000))
 
106
    interval = property(lambda self: self._interval,
 
107
                        _set_interval)
 
108
    del _set_interval
 
109
    def __init__(self, name=None, options=None, stop_hook=None,
 
110
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
111
                 timeout=None, interval=-1, checker=None):
281
112
        self.name = name
282
 
        if config is None:
283
 
            config = {}
284
 
        logger.debug(u"Creating client %r", self.name)
285
 
        # Uppercase and remove spaces from fingerprint for later
286
 
        # comparison purposes with return value from the fingerprint()
287
 
        # function
288
 
        self.fingerprint = (config[u"fingerprint"].upper()
289
 
                            .replace(u" ", u""))
290
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
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()
298
 
        else:
299
 
            raise TypeError(u"No secret or secfile for client %s"
300
 
                            % self.name)
301
 
        self.host = config.get(u"host", u"")
302
 
        self.created = datetime.datetime.utcnow()
303
 
        self.enabled = False
304
 
        self.last_enabled = None
305
 
        self.last_checked_ok = None
306
 
        self.timeout = string_to_delta(config[u"timeout"])
307
 
        self.interval = string_to_delta(config[u"interval"])
308
 
        self.disable_hook = disable_hook
 
113
        # Uppercase and remove spaces from fingerprint
 
114
        # for later comparison purposes with return value of
 
115
        # the fingerprint() function
 
116
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
117
        if secret:
 
118
            self.secret = secret.decode(u"base64")
 
119
        elif secfile:
 
120
            sf = open(secfile)
 
121
            self.secret = sf.read()
 
122
            sf.close()
 
123
        else:
 
124
            raise RuntimeError(u"No secret or secfile for client %s"
 
125
                               % self.name)
 
126
        self.fqdn = fqdn                # string
 
127
        self.created = datetime.datetime.now()
 
128
        self.last_seen = None
 
129
        if timeout is None:
 
130
            timeout = options.timeout
 
131
        self.timeout = timeout
 
132
        if interval == -1:
 
133
            interval = options.interval
 
134
        else:
 
135
            interval = string_to_delta(interval)
 
136
        self.interval = interval
 
137
        self.stop_hook = stop_hook
309
138
        self.checker = None
310
139
        self.checker_initiator_tag = None
311
 
        self.disable_initiator_tag = None
 
140
        self.stop_initiator_tag = None
312
141
        self.checker_callback_tag = None
313
 
        self.checker_command = config[u"checker"]
314
 
        self.current_checker_command = None
315
 
        self.last_connect = None
316
 
    
317
 
    def enable(self):
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()
 
142
        self.check_command = checker
 
143
    def start(self):
 
144
        """Start this clients checker and timeout hooks"""
323
145
        # Schedule a new checker to be started an 'interval' from now,
324
146
        # and every interval from then on.
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
 
147
        self.checker_initiator_tag = gobject.timeout_add\
 
148
                                     (self._interval_milliseconds,
 
149
                                      self.start_checker)
333
150
        # Also start a new checker *right now*.
334
151
        self.start_checker()
335
 
    
336
 
    def disable(self, quiet=True):
337
 
        """Disable this client."""
338
 
        if not getattr(self, "enabled", False):
339
 
            return 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):
 
152
        # Schedule a stop() when 'timeout' has passed
 
153
        self.stop_initiator_tag = gobject.timeout_add\
 
154
                                  (self._timeout_milliseconds,
 
155
                                   self.stop)
 
156
    def stop(self):
 
157
        """Stop this client.
 
158
        The possibility that this client might be restarted is left
 
159
        open, but not currently used."""
 
160
        logger.debug(u"Stopping client %s", self.name)
 
161
        self.secret = None
 
162
        if self.stop_initiator_tag:
 
163
            gobject.source_remove(self.stop_initiator_tag)
 
164
            self.stop_initiator_tag = None
 
165
        if self.checker_initiator_tag:
346
166
            gobject.source_remove(self.checker_initiator_tag)
347
167
            self.checker_initiator_tag = None
348
168
        self.stop_checker()
349
 
        if self.disable_hook:
350
 
            self.disable_hook(self)
351
 
        self.enabled = False
 
169
        if self.stop_hook:
 
170
            self.stop_hook(self)
352
171
        # Do not run this again if called by a gobject.timeout_add
353
172
        return False
354
 
    
355
173
    def __del__(self):
356
 
        self.disable_hook = None
357
 
        self.disable()
358
 
    
359
 
    def checker_callback(self, pid, condition, command):
 
174
        # Some code duplication here and in stop()
 
175
        if hasattr(self, "stop_initiator_tag") \
 
176
               and self.stop_initiator_tag:
 
177
            gobject.source_remove(self.stop_initiator_tag)
 
178
            self.stop_initiator_tag = None
 
179
        if hasattr(self, "checker_initiator_tag") \
 
180
               and self.checker_initiator_tag:
 
181
            gobject.source_remove(self.checker_initiator_tag)
 
182
            self.checker_initiator_tag = None
 
183
        self.stop_checker()
 
184
    def checker_callback(self, pid, condition):
360
185
        """The checker has completed, so take appropriate actions."""
361
 
        self.checker_callback_tag = None
362
 
        self.checker = None
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:
 
186
        now = datetime.datetime.now()
 
187
        if os.WIFEXITED(condition) \
 
188
               and (os.WEXITSTATUS(condition) == 0):
 
189
            logger.debug(u"Checker for %(name)s succeeded",
 
190
                         vars(self))
 
191
            self.last_seen = now
 
192
            gobject.source_remove(self.stop_initiator_tag)
 
193
            self.stop_initiator_tag = gobject.timeout_add\
 
194
                                      (self._timeout_milliseconds,
 
195
                                       self.stop)
 
196
        if not os.WIFEXITED(condition):
373
197
            logger.warning(u"Checker for %(name)s crashed?",
374
198
                           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
 
    
 
199
        else:
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
388
204
    def start_checker(self):
389
205
        """Start a new checker subprocess if one is not running.
390
 
        
391
206
        If a checker already exists, leave it running and do
392
207
        nothing."""
393
 
        # The reason for not killing a running checker is that if we
394
 
        # did that, then if a checker (for some reason) started
395
 
        # running slowly and taking more than 'interval' time, the
396
 
        # client would inevitably timeout, since no checker would get
397
 
        # a chance to run to completion.  If we instead leave running
398
 
        # checkers alone, the checker would have to take more time
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
416
208
        if self.checker is None:
 
209
            logger.debug(u"Starting checker for %s",
 
210
                         self.name)
417
211
            try:
418
 
                # In case checker_command has exactly one % operator
419
 
                command = self.checker_command % self.host
 
212
                command = self.check_command % self.fqdn
420
213
            except TypeError:
421
 
                # Escape attributes for the shell
422
 
                escaped_attrs = dict((key,
423
 
                                      re.escape(unicode(str(val),
424
 
                                                        errors=
425
 
                                                        u'replace')))
 
214
                escaped_attrs = dict((key, re.escape(str(val)))
426
215
                                     for key, val in
427
216
                                     vars(self).iteritems())
428
217
                try:
429
 
                    command = self.checker_command % escaped_attrs
 
218
                    command = self.check_command % escaped_attrs
430
219
                except TypeError, error:
431
 
                    logger.error(u'Could not format string "%s":'
432
 
                                 u' %s', self.checker_command, error)
 
220
                    logger.critical(u'Could not format string "%s": %s',
 
221
                                    self.check_command, error)
433
222
                    return True # Try again later
434
 
            self.current_checker_command = command
435
223
            try:
436
 
                logger.info(u"Starting checker %r for %s",
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.)
442
 
                self.checker = subprocess.Popen(command,
443
 
                                                close_fds=True,
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:
 
224
                self.checker = subprocess.\
 
225
                               Popen(command,
 
226
                                     stdout=subprocess.PIPE,
 
227
                                     close_fds=True, shell=True,
 
228
                                     cwd="/")
 
229
                self.checker_callback_tag = gobject.\
 
230
                                            child_watch_add(self.checker.pid,
 
231
                                                            self.\
 
232
                                                            checker_callback)
 
233
            except subprocess.OSError, error:
456
234
                logger.error(u"Failed to start subprocess: %s",
457
235
                             error)
458
236
        # Re-run this periodically if run by gobject.timeout_add
459
237
        return True
460
 
    
461
238
    def stop_checker(self):
462
239
        """Force the checker process, if any, to stop."""
463
 
        if self.checker_callback_tag:
464
 
            gobject.source_remove(self.checker_callback_tag)
465
 
            self.checker_callback_tag = None
466
 
        if getattr(self, u"checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
467
241
            return
468
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
469
 
        try:
470
 
            os.kill(self.checker.pid, signal.SIGTERM)
471
 
            #time.sleep(0.5)
472
 
            #if self.checker.poll() is None:
473
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
474
 
        except OSError, error:
475
 
            if error.errno != errno.ESRCH: # No such process
476
 
                raise
477
 
        self.checker = None
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):
 
242
        gobject.source_remove(self.checker_callback_tag)
728
243
        self.checker_callback_tag = None
 
244
        os.kill(self.checker.pid, signal.SIGTERM)
 
245
        if self.checker.poll() is None:
 
246
            os.kill(self.checker.pid, signal.SIGKILL)
729
247
        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
895
 
        if self.last_checked_ok is None:
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.
 
248
    def still_valid(self, now=None):
 
249
        """Has the timeout not yet passed for this client?"""
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
 
253
            return now < (self.created + self.timeout)
 
254
        else:
 
255
            return now < (self.last_seen + self.timeout)
 
256
 
 
257
 
 
258
def peer_certificate(session):
 
259
    # If not an OpenPGP certificate...
 
260
    if gnutls.library.functions.gnutls_certificate_type_get\
 
261
            (session._c_object) \
 
262
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
263
        # ...do the normal thing
 
264
        return session.peer_certificate
 
265
    list_size = ctypes.c_uint()
 
266
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
267
        (session._c_object, ctypes.byref(list_size))
 
268
    if list_size.value == 0:
 
269
        return None
 
270
    cert = cert_list[0]
 
271
    return ctypes.string_at(cert.data, cert.size)
 
272
 
 
273
 
 
274
def fingerprint(openpgp):
 
275
    # New empty GnuTLS certificate
 
276
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
277
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
278
        (ctypes.byref(crt))
 
279
    # New GnuTLS "datum" with the OpenPGP public key
 
280
    datum = gnutls.library.types.gnutls_datum_t\
 
281
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
282
                     ctypes.POINTER(ctypes.c_ubyte)),
 
283
         ctypes.c_uint(len(openpgp)))
 
284
    # Import the OpenPGP public key into the certificate
 
285
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
286
        (crt,
 
287
         ctypes.byref(datum),
 
288
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
289
    # New buffer for the fingerprint
 
290
    buffer = ctypes.create_string_buffer(20)
 
291
    buffer_length = ctypes.c_size_t()
 
292
    # Get the fingerprint from the certificate into the buffer
 
293
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
294
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
295
    # Deinit the certificate
 
296
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
297
    # Convert the buffer to a Python bytestring
 
298
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
299
    # Convert the bytestring to hexadecimal notation
 
300
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
301
    return hex_fpr
 
302
 
 
303
 
 
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
305
    """A TCP request handler class.
 
306
    Instantiated by IPv6_TCPServer for each request to handle it.
987
307
    Note: This will run in its own forked process."""
988
308
    
989
309
    def handle(self):
990
 
        logger.info(u"TCP connection from: %s",
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
 
    
 
310
        logger.debug(u"TCP connection from: %s",
 
311
                     unicode(self.client_address))
 
312
        session = gnutls.connection.ClientSession(self.request,
 
313
                                                  gnutls.connection.\
 
314
                                                  X509Credentials())
 
315
        
 
316
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
317
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
318
        #                "+DHE-DSS"))
 
319
        priority = "SECURE256"
 
320
        
 
321
        gnutls.library.functions.gnutls_priority_set_direct\
 
322
            (session._c_object, priority, None);
 
323
        
 
324
        try:
 
325
            session.handshake()
 
326
        except gnutls.errors.GNUTLSError, error:
 
327
            logger.debug(u"Handshake failed: %s", error)
 
328
            # Do not run session.bye() here: the session is not
 
329
            # established.  Just abandon the request.
 
330
            return
 
331
        try:
 
332
            fpr = fingerprint(peer_certificate(session))
 
333
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
334
            logger.debug(u"Bad certificate: %s", error)
 
335
            session.bye()
 
336
            return
 
337
        logger.debug(u"Fingerprint: %s", fpr)
 
338
        client = None
 
339
        for c in clients:
 
340
            if c.fingerprint == fpr:
 
341
                client = c
 
342
                break
 
343
        # Have to check if client.still_valid(), since it is possible
 
344
        # that the client timed out while establishing the GnuTLS
 
345
        # session.
 
346
        if (not client) or (not client.still_valid()):
 
347
            if client:
 
348
                logger.debug(u"Client %(name)s is invalid",
 
349
                             vars(client))
 
350
            else:
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
 
353
            session.bye()
 
354
            return
 
355
        sent_size = 0
 
356
        while sent_size < len(client.secret):
 
357
            sent = session.send(client.secret[sent_size:])
 
358
            logger.debug(u"Sent: %d, remaining: %d",
 
359
                         sent, len(client.secret)
 
360
                         - (sent_size + sent))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1163
367
    Attributes:
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
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1167
370
    """
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)
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
1175
380
    def server_bind(self):
1176
381
        """This overrides the normal server_bind() function
1177
382
        to bind to an interface if one was specified, and also NOT to
1178
383
        bind to an address or port if they were not specified."""
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
 
384
        if self.options.interface:
 
385
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
386
                # From /usr/include/asm-i486/socket.h
 
387
                socket.SO_BINDTODEVICE = 25
 
388
            try:
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    logger.warning(u"No permission to"
 
395
                                   u" bind to interface %s",
 
396
                                   self.options.interface)
 
397
                else:
 
398
                    raise error
1201
399
        # Only bind(2) the socket if we really need to.
1202
400
        if self.server_address[0] or self.server_address[1]:
1203
401
            if not self.server_address[0]:
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,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
1209
404
                                       self.server_address[1])
1210
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
1211
406
                self.server_address = (self.server_address[0],
1212
407
                                       0)
1213
 
#                 if self.interface:
1214
 
#                     self.server_address = (self.server_address[0],
1215
 
#                                            0, # port
1216
 
#                                            0, # flowinfo
1217
 
#                                            if_nametoindex
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
 
408
            return super(type(self), self).server_bind()
1346
409
 
1347
410
 
1348
411
def string_to_delta(interval):
1349
412
    """Parse a string and return a datetime.timedelta
1350
 
    
1351
 
    >>> string_to_delta(u'7d')
 
413
 
 
414
    >>> string_to_delta('7d')
1352
415
    datetime.timedelta(7)
1353
 
    >>> string_to_delta(u'60s')
 
416
    >>> string_to_delta('60s')
1354
417
    datetime.timedelta(0, 60)
1355
 
    >>> string_to_delta(u'60m')
 
418
    >>> string_to_delta('60m')
1356
419
    datetime.timedelta(0, 3600)
1357
 
    >>> string_to_delta(u'24h')
 
420
    >>> string_to_delta('24h')
1358
421
    datetime.timedelta(1)
1359
422
    >>> string_to_delta(u'1w')
1360
423
    datetime.timedelta(7)
1361
 
    >>> string_to_delta(u'5m 30s')
1362
 
    datetime.timedelta(0, 330)
1363
424
    """
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
 
425
    try:
 
426
        suffix=unicode(interval[-1])
 
427
        value=int(interval[:-1])
 
428
        if suffix == u"d":
 
429
            delta = datetime.timedelta(value)
 
430
        elif suffix == u"s":
 
431
            delta = datetime.timedelta(0, value)
 
432
        elif suffix == u"m":
 
433
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
434
        elif suffix == u"h":
 
435
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
436
        elif suffix == u"w":
 
437
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
438
        else:
 
439
            raise ValueError
 
440
    except (ValueError, IndexError):
 
441
        raise ValueError
 
442
    return delta
 
443
 
 
444
 
 
445
def add_service():
 
446
    """From the Avahi server example code"""
 
447
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
448
           domain, host
 
449
    if group is None:
 
450
        group = dbus.Interface(
 
451
                bus.get_object( avahi.DBUS_NAME,
 
452
                                server.EntryGroupNew()),
 
453
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
454
        group.connect_to_signal('StateChanged',
 
455
                                entry_group_state_changed)
 
456
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
457
                 serviceName, serviceType)
 
458
    
 
459
    group.AddService(
 
460
            serviceInterface,           # interface
 
461
            avahi.PROTO_INET6,          # protocol
 
462
            dbus.UInt32(0),             # flags
 
463
            serviceName, serviceType,
 
464
            domain, host,
 
465
            dbus.UInt16(servicePort),
 
466
            avahi.string_array_to_txt_array(serviceTXT))
 
467
    group.Commit()
 
468
 
 
469
 
 
470
def remove_service():
 
471
    """From the Avahi server example code"""
 
472
    global group
 
473
    
 
474
    if not group is None:
 
475
        group.Reset()
 
476
 
 
477
 
 
478
def server_state_changed(state):
 
479
    """From the Avahi server example code"""
 
480
    if state == avahi.SERVER_COLLISION:
 
481
        logger.warning(u"Server name collision")
 
482
        remove_service()
 
483
    elif state == avahi.SERVER_RUNNING:
 
484
        add_service()
 
485
 
 
486
 
 
487
def entry_group_state_changed(state, error):
 
488
    """From the Avahi server example code"""
 
489
    global serviceName, server, rename_count
 
490
    
 
491
    logger.debug(u"state change: %i", state)
 
492
    
 
493
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
494
        logger.debug(u"Service established.")
 
495
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
496
        
 
497
        rename_count = rename_count - 1
 
498
        if rename_count > 0:
 
499
            name = server.GetAlternativeServiceName(name)
 
500
            logger.warning(u"Service name collision, "
 
501
                           u"changing name to '%s' ...", name)
 
502
            remove_service()
 
503
            add_service()
 
504
            
 
505
        else:
 
506
            logger.error(u"No suitable service name found "
 
507
                         u"after %i retries, exiting.",
 
508
                         n_rename)
 
509
            main_loop.quit()
 
510
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
511
        logger.error(u"Error in group state changed %s",
 
512
                     unicode(error))
 
513
        main_loop.quit()
 
514
        return
1385
515
 
1386
516
 
1387
517
def if_nametoindex(interface):
1388
 
    """Call the C function if_nametoindex(), or equivalent
1389
 
    
1390
 
    Note: This function cannot accept a unicode string."""
1391
 
    global if_nametoindex
 
518
    """Call the C function if_nametoindex()"""
1392
519
    try:
1393
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1394
 
                          (ctypes.util.find_library(u"c"))
1395
 
                          .if_nametoindex)
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
1396
522
    except (OSError, AttributeError):
1397
 
        logger.warning(u"Doing if_nametoindex the hard way")
1398
 
        def if_nametoindex(interface):
1399
 
            "Get an interface index the hard way, i.e. using fcntl()"
1400
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
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]
1407
 
            return interface_index
1408
 
    return if_nametoindex(interface)
1409
 
 
1410
 
 
1411
 
def daemon(nochdir = False, noclose = False):
1412
 
    """See daemon(3).  Standard BSD Unix function.
1413
 
    
1414
 
    This should really exist as os.daemon, but it doesn't (yet)."""
1415
 
    if os.fork():
1416
 
        sys.exit()
1417
 
    os.setsid()
1418
 
    if not nochdir:
1419
 
        os.chdir(u"/")
1420
 
    if os.fork():
1421
 
        sys.exit()
1422
 
    if not noclose:
1423
 
        # Close all standard open file descriptors
1424
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1425
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1426
 
            raise OSError(errno.ENODEV,
1427
 
                          u"%s not a character device"
1428
 
                          % os.path.devnull)
1429
 
        os.dup2(null, sys.stdin.fileno())
1430
 
        os.dup2(null, sys.stdout.fileno())
1431
 
        os.dup2(null, sys.stderr.fileno())
1432
 
        if null > 2:
1433
 
            os.close(null)
1434
 
 
1435
 
 
1436
 
def main():
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]
 
523
        if "struct" not in sys.modules:
 
524
            import struct
 
525
        if "fcntl" not in sys.modules:
 
526
            import fcntl
 
527
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
528
        s = socket.socket()
 
529
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
530
                            struct.pack("16s16x", interface))
 
531
        s.close()
 
532
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
533
        return interface_index
 
534
 
 
535
 
 
536
if __name__ == '__main__':
 
537
    parser = OptionParser()
 
538
    parser.add_option("-i", "--interface", type="string",
 
539
                      default=None, metavar="IF",
 
540
                      help="Bind to interface IF")
 
541
    parser.add_option("--cert", type="string", default="cert.pem",
 
542
                      metavar="FILE",
 
543
                      help="Public key certificate PEM file to use")
 
544
    parser.add_option("--key", type="string", default="key.pem",
 
545
                      metavar="FILE",
 
546
                      help="Private key PEM file to use")
 
547
    parser.add_option("--ca", type="string", default="ca.pem",
 
548
                      metavar="FILE",
 
549
                      help="Certificate Authority certificate PEM file to use")
 
550
    parser.add_option("--crl", type="string", default="crl.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Revokation List PEM file to use")
 
553
    parser.add_option("-p", "--port", type="int", default=None,
 
554
                      help="Port number to receive requests on")
 
555
    parser.add_option("--timeout", type="string", # Parsed later
 
556
                      default="1h",
 
557
                      help="Amount of downtime allowed for clients")
 
558
    parser.add_option("--interval", type="string", # Parsed later
 
559
                      default="5m",
 
560
                      help="How often to check that a client is up")
 
561
    parser.add_option("--check", action="store_true", default=False,
 
562
                      help="Run self-test")
 
563
    parser.add_option("--debug", action="store_true", default=False,
 
564
                      help="Debug mode")
 
565
    (options, args) = parser.parse_args()
1467
566
    
1468
567
    if options.check:
1469
568
        import doctest
1470
569
        doctest.testmod()
1471
570
        sys.exit()
1472
571
    
1473
 
    # Default values for config file for server-global settings
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",
1483
 
                        }
1484
 
    
1485
 
    # Parse config file for server-global settings
1486
 
    server_config = configparser.SafeConfigParser(server_defaults)
1487
 
    del server_defaults
1488
 
    server_config.read(os.path.join(options.configdir,
1489
 
                                    u"mandos.conf"))
1490
 
    # Convert the SafeConfigParser object to a dict
1491
 
    server_settings = server_config.defaults()
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")
1499
 
    del server_config
1500
 
    
1501
 
    # Override the settings from the config file with command line
1502
 
    # options, if set.
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"):
1506
 
        value = getattr(options, option)
1507
 
        if value is not None:
1508
 
            server_settings[option] = value
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])
1514
 
    # Now we have our good server settings in "server_settings"
1515
 
    
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"]
1522
 
    
1523
 
    if not debug:
1524
 
        syslogger.setLevel(logging.WARNING)
1525
 
        console.setLevel(logging.WARNING)
1526
 
    
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"]))
1532
 
    
1533
 
    # Parse config file with clients
1534
 
    client_defaults = { u"timeout": u"1h",
1535
 
                        u"interval": u"5m",
1536
 
                        u"checker": u"fping -q -- %%(host)s",
1537
 
                        u"host": u"",
1538
 
                        }
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))
1593
 
    
1594
 
    global main_loop
1595
 
    # From the Avahi example code
 
572
    # Parse the time arguments
 
573
    try:
 
574
        options.timeout = string_to_delta(options.timeout)
 
575
    except ValueError:
 
576
        parser.error("option --timeout: Unparseable time")
 
577
    try:
 
578
        options.interval = string_to_delta(options.interval)
 
579
    except ValueError:
 
580
        parser.error("option --interval: Unparseable time")
 
581
    
 
582
    # Parse config file
 
583
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
584
    client_config = ConfigParser.SafeConfigParser(defaults)
 
585
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
586
    client_config.read("mandos-clients.conf")
 
587
    
 
588
    # From the Avahi server example code
1596
589
    DBusGMainLoop(set_as_default=True )
1597
590
    main_loop = gobject.MainLoop()
1598
591
    bus = dbus.SystemBus()
1599
 
    # End of Avahi example code
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
1635
 
        logger.removeHandler(console)
1636
 
        # Close all input and output, do double fork, etc.
1637
 
        daemon()
1638
 
    
1639
 
    try:
1640
 
        with pidfile:
1641
 
            pid = os.getpid()
1642
 
            pidfile.write(str(pid) + "\n")
1643
 
        del pidfile
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()
1711
 
    
1712
 
    def cleanup():
1713
 
        "Cleanup function; run on exit"
1714
 
        service.cleanup()
1715
 
        
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)
1727
 
    
1728
 
    atexit.register(cleanup)
1729
 
    
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
 
    
1739
 
    # Find out what port we got
1740
 
    service.port = tcp_server.socket.getsockname()[1]
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())
1748
 
    
1749
 
    #service.interface = tcp_server.socket.getsockname()[3]
1750
 
    
1751
 
    try:
1752
 
        # From the Avahi example code
1753
 
        try:
1754
 
            service.activate()
1755
 
        except dbus.exceptions.DBusException, error:
1756
 
            logger.critical(u"DBusException: %s", error)
1757
 
            cleanup()
1758
 
            sys.exit(1)
1759
 
        # End of Avahi example code
1760
 
        
1761
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1762
 
                             lambda *args, **kwargs:
1763
 
                             (tcp_server.handle_request
1764
 
                              (*args[2:], **kwargs) or True))
1765
 
        
1766
 
        logger.debug(u"Starting main loop")
 
592
    server = dbus.Interface(
 
593
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
594
            avahi.DBUS_INTERFACE_SERVER )
 
595
    # End of Avahi example code
 
596
    
 
597
    debug = options.debug
 
598
    
 
599
    clients = Set()
 
600
    def remove_from_clients(client):
 
601
        clients.remove(client)
 
602
        if not clients:
 
603
            logger.debug(u"No clients left, exiting")
 
604
            main_loop.quit()
 
605
    
 
606
    clients.update(Set(Client(name=section, options=options,
 
607
                              stop_hook = remove_from_clients,
 
608
                              **(dict(client_config\
 
609
                                      .items(section))))
 
610
                       for section in client_config.sections()))
 
611
    for client in clients:
 
612
        client.start()
 
613
    
 
614
    tcp_server = IPv6_TCPServer((None, options.port),
 
615
                                tcp_handler,
 
616
                                options=options,
 
617
                                clients=clients)
 
618
    # Find out what random port we got
 
619
    servicePort = tcp_server.socket.getsockname()[1]
 
620
    logger.debug(u"Now listening on port %d", servicePort)
 
621
    
 
622
    if options.interface is not None:
 
623
        serviceInterface = if_nametoindex(options.interface)
 
624
    
 
625
    # From the Avahi server example code
 
626
    server.connect_to_signal("StateChanged", server_state_changed)
 
627
    server_state_changed(server.GetState())
 
628
    # End of Avahi example code
 
629
    
 
630
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
631
                         lambda *args, **kwargs:
 
632
                         tcp_server.handle_request(*args[2:],
 
633
                                                   **kwargs) or True)
 
634
    try:
1767
635
        main_loop.run()
1768
 
    except AvahiError, error:
1769
 
        logger.critical(u"AvahiError: %s", error)
1770
 
        cleanup()
1771
 
        sys.exit(1)
1772
636
    except KeyboardInterrupt:
1773
 
        if debug:
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()
 
637
        print
 
638
    
 
639
    # Cleanup here
1779
640
 
1780
 
if __name__ == '__main__':
1781
 
    main()
 
641
    # From the Avahi server example code
 
642
    if not group is None:
 
643
        group.Free()
 
644
    # End of Avahi example code
 
645
    
 
646
    for client in clients:
 
647
        client.stop_hook = None
 
648
        client.stop()