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  • 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

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#!/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
 
from contextlib import closing
59
 
import struct
60
 
import fcntl
61
 
import functools
62
24
 
63
25
import dbus
64
 
import dbus.service
65
26
import gobject
66
27
import avahi
67
28
from dbus.mainloop.glib import DBusGMainLoop
68
29
import ctypes
69
 
import ctypes.util
70
 
import xml.dom.minidom
71
 
import inspect
72
 
 
73
 
try:
74
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
 
except AttributeError:
76
 
    try:
77
 
        from IN import SO_BINDTODEVICE
78
 
    except ImportError:
79
 
        SO_BINDTODEVICE = None
80
 
 
81
 
 
82
 
version = "1.0.14"
83
 
 
84
 
logger = logging.Logger(u'mandos')
85
 
syslogger = (logging.handlers.SysLogHandler
86
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
 
              address = "/dev/log"))
88
 
syslogger.setFormatter(logging.Formatter
89
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
90
 
                        u' %(message)s'))
91
 
logger.addHandler(syslogger)
92
 
 
93
 
console = logging.StreamHandler()
94
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
 
                                       u' %(levelname)s:'
96
 
                                       u' %(message)s'))
97
 
logger.addHandler(console)
98
 
 
99
 
class AvahiError(Exception):
100
 
    def __init__(self, value, *args, **kwargs):
101
 
        self.value = value
102
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
103
 
    def __unicode__(self):
104
 
        return unicode(repr(self.value))
105
 
 
106
 
class AvahiServiceError(AvahiError):
107
 
    pass
108
 
 
109
 
class AvahiGroupError(AvahiError):
110
 
    pass
111
 
 
112
 
 
113
 
class AvahiService(object):
114
 
    """An Avahi (Zeroconf) service.
115
 
    
116
 
    Attributes:
117
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
118
 
               Used to optionally bind to the specified interface.
119
 
    name: string; Example: u'Mandos'
120
 
    type: string; Example: u'_mandos._tcp'.
121
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
122
 
    port: integer; what port to announce
123
 
    TXT: list of strings; TXT record for the service
124
 
    domain: string; Domain to publish on, default to .local if empty.
125
 
    host: string; Host to publish records for, default is localhost
126
 
    max_renames: integer; maximum number of renames
127
 
    rename_count: integer; counter so we only rename after collisions
128
 
                  a sensible number of times
129
 
    group: D-Bus Entry Group
130
 
    server: D-Bus Server
131
 
    bus: dbus.SystemBus()
132
 
    """
133
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
 
                 servicetype = None, port = None, TXT = None,
135
 
                 domain = u"", host = u"", max_renames = 32768,
136
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
137
 
        self.interface = interface
138
 
        self.name = name
139
 
        self.type = servicetype
140
 
        self.port = port
141
 
        self.TXT = TXT if TXT is not None else []
142
 
        self.domain = domain
143
 
        self.host = host
144
 
        self.rename_count = 0
145
 
        self.max_renames = max_renames
146
 
        self.protocol = protocol
147
 
        self.group = None       # our entry group
148
 
        self.server = None
149
 
        self.bus = bus
150
 
    def rename(self):
151
 
        """Derived from the Avahi example code"""
152
 
        if self.rename_count >= self.max_renames:
153
 
            logger.critical(u"No suitable Zeroconf service name found"
154
 
                            u" after %i retries, exiting.",
155
 
                            self.rename_count)
156
 
            raise AvahiServiceError(u"Too many renames")
157
 
        self.name = self.server.GetAlternativeServiceName(self.name)
158
 
        logger.info(u"Changing Zeroconf service name to %r ...",
159
 
                    unicode(self.name))
160
 
        syslogger.setFormatter(logging.Formatter
161
 
                               (u'Mandos (%s) [%%(process)d]:'
162
 
                                u' %%(levelname)s: %%(message)s'
163
 
                                % self.name))
164
 
        self.remove()
165
 
        self.add()
166
 
        self.rename_count += 1
167
 
    def remove(self):
168
 
        """Derived from the Avahi example code"""
169
 
        if self.group is not None:
170
 
            self.group.Reset()
171
 
    def add(self):
172
 
        """Derived from the Avahi example code"""
173
 
        if self.group is None:
174
 
            self.group = dbus.Interface(
175
 
                self.bus.get_object(avahi.DBUS_NAME,
176
 
                                    self.server.EntryGroupNew()),
177
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
 
            self.group.connect_to_signal('StateChanged',
179
 
                                         self
180
 
                                         .entry_group_state_changed)
181
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
 
                     self.name, self.type)
183
 
        self.group.AddService(
184
 
            self.interface,
185
 
            self.protocol,
186
 
            dbus.UInt32(0),     # flags
187
 
            self.name, self.type,
188
 
            self.domain, self.host,
189
 
            dbus.UInt16(self.port),
190
 
            avahi.string_array_to_txt_array(self.TXT))
191
 
        self.group.Commit()
192
 
    def entry_group_state_changed(self, state, error):
193
 
        """Derived from the Avahi example code"""
194
 
        logger.debug(u"Avahi state change: %i", state)
195
 
        
196
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
 
            logger.debug(u"Zeroconf service established.")
198
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
199
 
            logger.warning(u"Zeroconf service name collision.")
200
 
            self.rename()
201
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
202
 
            logger.critical(u"Avahi: Error in group state changed %s",
203
 
                            unicode(error))
204
 
            raise AvahiGroupError(u"State changed: %s"
205
 
                                  % unicode(error))
206
 
    def cleanup(self):
207
 
        """Derived from the Avahi example code"""
208
 
        if self.group is not None:
209
 
            self.group.Free()
210
 
            self.group = None
211
 
    def server_state_changed(self, state):
212
 
        """Derived from the Avahi example code"""
213
 
        if state == avahi.SERVER_COLLISION:
214
 
            logger.error(u"Zeroconf server name collision")
215
 
            self.remove()
216
 
        elif state == avahi.SERVER_RUNNING:
217
 
            self.add()
218
 
    def activate(self):
219
 
        """Derived from the Avahi example code"""
220
 
        if self.server is None:
221
 
            self.server = dbus.Interface(
222
 
                self.bus.get_object(avahi.DBUS_NAME,
223
 
                                    avahi.DBUS_PATH_SERVER),
224
 
                avahi.DBUS_INTERFACE_SERVER)
225
 
        self.server.connect_to_signal(u"StateChanged",
226
 
                                 self.server_state_changed)
227
 
        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
228
54
 
229
55
 
230
56
class Client(object):
231
57
    """A representation of a client host served by this server.
232
 
    
233
58
    Attributes:
234
 
    name:       string; from the config file, used in log messages and
235
 
                        D-Bus identifiers
 
59
    name:      string; from the config file, used in log messages
236
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
237
61
                 uniquely identify the client
238
 
    secret:     bytestring; sent verbatim (over TLS) to client
239
 
    host:       string; available for use by the checker command
240
 
    created:    datetime.datetime(); (UTC) object creation
241
 
    last_enabled: datetime.datetime(); (UTC)
242
 
    enabled:    bool()
243
 
    last_checked_ok: datetime.datetime(); (UTC) or None
244
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
245
 
                                      until this client is invalid
246
 
    interval:   datetime.timedelta(); How often to start a new checker
247
 
    disable_hook:  If set, called by disable() as disable_hook(self)
248
 
    checker:    subprocess.Popen(); a running checker process used
249
 
                                    to see if the client lives.
250
 
                                    '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.
251
73
    checker_initiator_tag: a gobject event source tag, or None
252
 
    disable_initiator_tag: - '' -
 
74
    stop_initiator_tag:    - '' -
253
75
    checker_callback_tag:  - '' -
254
76
    checker_command: string; External command which is run to check if
255
 
                     client lives.  %() expansions are done at
 
77
                     client lives.  %()s expansions are done at
256
78
                     runtime with vars(self) as dict, so that for
257
79
                     instance %(name)s can be used in the command.
258
 
    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: - '' -
259
85
    """
260
 
    
261
 
    @staticmethod
262
 
    def _timedelta_to_milliseconds(td):
263
 
        "Convert a datetime.timedelta() to milliseconds"
264
 
        return ((td.days * 24 * 60 * 60 * 1000)
265
 
                + (td.seconds * 1000)
266
 
                + (td.microseconds // 1000))
267
 
    
268
 
    def timeout_milliseconds(self):
269
 
        "Return the 'timeout' attribute in milliseconds"
270
 
        return self._timedelta_to_milliseconds(self.timeout)
271
 
    
272
 
    def interval_milliseconds(self):
273
 
        "Return the 'interval' attribute in milliseconds"
274
 
        return self._timedelta_to_milliseconds(self.interval)
275
 
    
276
 
    def __init__(self, name = None, disable_hook=None, config=None):
277
 
        """Note: the 'checker' key in 'config' sets the
278
 
        'checker_command' attribute and *not* the 'checker'
279
 
        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):
280
112
        self.name = name
281
 
        if config is None:
282
 
            config = {}
283
 
        logger.debug(u"Creating client %r", self.name)
284
 
        # Uppercase and remove spaces from fingerprint for later
285
 
        # comparison purposes with return value from the fingerprint()
286
 
        # function
287
 
        self.fingerprint = (config[u"fingerprint"].upper()
288
 
                            .replace(u" ", u""))
289
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
290
 
        if u"secret" in config:
291
 
            self.secret = config[u"secret"].decode(u"base64")
292
 
        elif u"secfile" in config:
293
 
            with closing(open(os.path.expanduser
294
 
                              (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 declared invalid, which
400
 
        # is as it 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
 
242
        gobject.source_remove(self.checker_callback_tag)
 
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)
477
247
        self.checker = None
478
 
    
479
 
    def still_valid(self):
 
248
    def still_valid(self, now=None):
480
249
        """Has the timeout not yet passed for this client?"""
481
 
        if not getattr(self, u"enabled", False):
482
 
            return False
483
 
        now = datetime.datetime.utcnow()
484
 
        if self.last_checked_ok is None:
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
485
253
            return now < (self.created + self.timeout)
486
254
        else:
487
 
            return now < (self.last_checked_ok + self.timeout)
488
 
 
489
 
 
490
 
def dbus_service_property(dbus_interface, signature=u"v",
491
 
                          access=u"readwrite", byte_arrays=False):
492
 
    """Decorators for marking methods of a DBusObjectWithProperties to
493
 
    become properties on the D-Bus.
494
 
    
495
 
    The decorated method will be called with no arguments by "Get"
496
 
    and with one argument by "Set".
497
 
    
498
 
    The parameters, where they are supported, are the same as
499
 
    dbus.service.method, except there is only "signature", since the
500
 
    type from Get() and the type sent to Set() is the same.
501
 
    """
502
 
    def decorator(func):
503
 
        func._dbus_is_property = True
504
 
        func._dbus_interface = dbus_interface
505
 
        func._dbus_signature = signature
506
 
        func._dbus_access = access
507
 
        func._dbus_name = func.__name__
508
 
        if func._dbus_name.endswith(u"_dbus_property"):
509
 
            func._dbus_name = func._dbus_name[:-14]
510
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
 
        return func
512
 
    return decorator
513
 
 
514
 
 
515
 
class DBusPropertyException(dbus.exceptions.DBusException):
516
 
    """A base class for D-Bus property-related exceptions
517
 
    """
518
 
    def __unicode__(self):
519
 
        return unicode(str(self))
520
 
 
521
 
 
522
 
class DBusPropertyAccessException(DBusPropertyException):
523
 
    """A property's access permissions disallows an operation.
524
 
    """
525
 
    pass
526
 
 
527
 
 
528
 
class DBusPropertyNotFound(DBusPropertyException):
529
 
    """An attempt was made to access a non-existing property.
530
 
    """
531
 
    pass
532
 
 
533
 
 
534
 
class DBusObjectWithProperties(dbus.service.Object):
535
 
    """A D-Bus object with properties.
536
 
 
537
 
    Classes inheriting from this can use the dbus_service_property
538
 
    decorator to expose methods as D-Bus properties.  It exposes the
539
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
540
 
    """
541
 
    
542
 
    @staticmethod
543
 
    def _is_dbus_property(obj):
544
 
        return getattr(obj, u"_dbus_is_property", False)
545
 
    
546
 
    def _get_all_dbus_properties(self):
547
 
        """Returns a generator of (name, attribute) pairs
548
 
        """
549
 
        return ((prop._dbus_name, prop)
550
 
                for name, prop in
551
 
                inspect.getmembers(self, self._is_dbus_property))
552
 
    
553
 
    def _get_dbus_property(self, interface_name, property_name):
554
 
        """Returns a bound method if one exists which is a D-Bus
555
 
        property with the specified name and interface.
556
 
        """
557
 
        for name in (property_name,
558
 
                     property_name + u"_dbus_property"):
559
 
            prop = getattr(self, name, None)
560
 
            if (prop is None
561
 
                or not self._is_dbus_property(prop)
562
 
                or prop._dbus_name != property_name
563
 
                or (interface_name and prop._dbus_interface
564
 
                    and interface_name != prop._dbus_interface)):
565
 
                continue
566
 
            return prop
567
 
        # No such property
568
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
 
                                   + interface_name + u"."
570
 
                                   + property_name)
571
 
    
572
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
 
                         out_signature=u"v")
574
 
    def Get(self, interface_name, property_name):
575
 
        """Standard D-Bus property Get() method, see D-Bus standard.
576
 
        """
577
 
        prop = self._get_dbus_property(interface_name, property_name)
578
 
        if prop._dbus_access == u"write":
579
 
            raise DBusPropertyAccessException(property_name)
580
 
        value = prop()
581
 
        if not hasattr(value, u"variant_level"):
582
 
            return value
583
 
        return type(value)(value, variant_level=value.variant_level+1)
584
 
    
585
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
586
 
    def Set(self, interface_name, property_name, value):
587
 
        """Standard D-Bus property Set() method, see D-Bus standard.
588
 
        """
589
 
        prop = self._get_dbus_property(interface_name, property_name)
590
 
        if prop._dbus_access == u"read":
591
 
            raise DBusPropertyAccessException(property_name)
592
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
593
 
            value = dbus.ByteArray(''.join(unichr(byte)
594
 
                                           for byte in value))
595
 
        prop(value)
596
 
    
597
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
 
                         out_signature=u"a{sv}")
599
 
    def GetAll(self, interface_name):
600
 
        """Standard D-Bus property GetAll() method, see D-Bus
601
 
        standard.
602
 
 
603
 
        Note: Will not include properties with access="write".
604
 
        """
605
 
        all = {}
606
 
        for name, prop in self._get_all_dbus_properties():
607
 
            if (interface_name
608
 
                and interface_name != prop._dbus_interface):
609
 
                # Interface non-empty but did not match
610
 
                continue
611
 
            # Ignore write-only properties
612
 
            if prop._dbus_access == u"write":
613
 
                continue
614
 
            value = prop()
615
 
            if not hasattr(value, u"variant_level"):
616
 
                all[name] = value
617
 
                continue
618
 
            all[name] = type(value)(value, variant_level=
619
 
                                    value.variant_level+1)
620
 
        return dbus.Dictionary(all, signature=u"sv")
621
 
    
622
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
 
                         out_signature=u"s",
624
 
                         path_keyword='object_path',
625
 
                         connection_keyword='connection')
626
 
    def Introspect(self, object_path, connection):
627
 
        """Standard D-Bus method, overloaded to insert property tags.
628
 
        """
629
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
630
 
                                                   connection)
631
 
        try:
632
 
            document = xml.dom.minidom.parseString(xmlstring)
633
 
            def make_tag(document, name, prop):
634
 
                e = document.createElement(u"property")
635
 
                e.setAttribute(u"name", name)
636
 
                e.setAttribute(u"type", prop._dbus_signature)
637
 
                e.setAttribute(u"access", prop._dbus_access)
638
 
                return e
639
 
            for if_tag in document.getElementsByTagName(u"interface"):
640
 
                for tag in (make_tag(document, name, prop)
641
 
                            for name, prop
642
 
                            in self._get_all_dbus_properties()
643
 
                            if prop._dbus_interface
644
 
                            == if_tag.getAttribute(u"name")):
645
 
                    if_tag.appendChild(tag)
646
 
                # Add the names to the return values for the
647
 
                # "org.freedesktop.DBus.Properties" methods
648
 
                if (if_tag.getAttribute(u"name")
649
 
                    == u"org.freedesktop.DBus.Properties"):
650
 
                    for cn in if_tag.getElementsByTagName(u"method"):
651
 
                        if cn.getAttribute(u"name") == u"Get":
652
 
                            for arg in cn.getElementsByTagName(u"arg"):
653
 
                                if (arg.getAttribute(u"direction")
654
 
                                    == u"out"):
655
 
                                    arg.setAttribute(u"name", u"value")
656
 
                        elif cn.getAttribute(u"name") == u"GetAll":
657
 
                            for arg in cn.getElementsByTagName(u"arg"):
658
 
                                if (arg.getAttribute(u"direction")
659
 
                                    == u"out"):
660
 
                                    arg.setAttribute(u"name", u"props")
661
 
            xmlstring = document.toxml(u"utf-8")
662
 
            document.unlink()
663
 
        except (AttributeError, xml.dom.DOMException,
664
 
                xml.parsers.expat.ExpatError), error:
665
 
            logger.error(u"Failed to override Introspection method",
666
 
                         error)
667
 
        return xmlstring
668
 
 
669
 
 
670
 
class ClientDBus(Client, DBusObjectWithProperties):
671
 
    """A Client class using D-Bus
672
 
    
673
 
    Attributes:
674
 
    dbus_object_path: dbus.ObjectPath
675
 
    bus: dbus.SystemBus()
676
 
    """
677
 
    # dbus.service.Object doesn't use super(), so we can't either.
678
 
    
679
 
    def __init__(self, bus = None, *args, **kwargs):
680
 
        self.bus = bus
681
 
        Client.__init__(self, *args, **kwargs)
682
 
        # Only now, when this client is initialized, can it show up on
683
 
        # the D-Bus
684
 
        self.dbus_object_path = (dbus.ObjectPath
685
 
                                 (u"/clients/"
686
 
                                  + self.name.replace(u".", u"_")))
687
 
        DBusObjectWithProperties.__init__(self, self.bus,
688
 
                                          self.dbus_object_path)
689
 
    
690
 
    @staticmethod
691
 
    def _datetime_to_dbus(dt, variant_level=0):
692
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
693
 
        return dbus.String(dt.isoformat(),
694
 
                           variant_level=variant_level)
695
 
    
696
 
    def enable(self):
697
 
        oldstate = getattr(self, u"enabled", False)
698
 
        r = Client.enable(self)
699
 
        if oldstate != self.enabled:
700
 
            # Emit D-Bus signals
701
 
            self.PropertyChanged(dbus.String(u"enabled"),
702
 
                                 dbus.Boolean(True, variant_level=1))
703
 
            self.PropertyChanged(
704
 
                dbus.String(u"last_enabled"),
705
 
                self._datetime_to_dbus(self.last_enabled,
706
 
                                       variant_level=1))
707
 
        return r
708
 
    
709
 
    def disable(self, quiet = False):
710
 
        oldstate = getattr(self, u"enabled", False)
711
 
        r = Client.disable(self, quiet=quiet)
712
 
        if not quiet and oldstate != self.enabled:
713
 
            # Emit D-Bus signal
714
 
            self.PropertyChanged(dbus.String(u"enabled"),
715
 
                                 dbus.Boolean(False, variant_level=1))
716
 
        return r
717
 
    
718
 
    def __del__(self, *args, **kwargs):
719
 
        try:
720
 
            self.remove_from_connection()
721
 
        except LookupError:
722
 
            pass
723
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
724
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
 
        Client.__del__(self, *args, **kwargs)
726
 
    
727
 
    def checker_callback(self, pid, condition, command,
728
 
                         *args, **kwargs):
729
 
        self.checker_callback_tag = None
730
 
        self.checker = None
731
 
        # Emit D-Bus signal
732
 
        self.PropertyChanged(dbus.String(u"checker_running"),
733
 
                             dbus.Boolean(False, variant_level=1))
734
 
        if os.WIFEXITED(condition):
735
 
            exitstatus = os.WEXITSTATUS(condition)
736
 
            # Emit D-Bus signal
737
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
738
 
                                  dbus.Int64(condition),
739
 
                                  dbus.String(command))
740
 
        else:
741
 
            # Emit D-Bus signal
742
 
            self.CheckerCompleted(dbus.Int16(-1),
743
 
                                  dbus.Int64(condition),
744
 
                                  dbus.String(command))
745
 
        
746
 
        return Client.checker_callback(self, pid, condition, command,
747
 
                                       *args, **kwargs)
748
 
    
749
 
    def checked_ok(self, *args, **kwargs):
750
 
        r = Client.checked_ok(self, *args, **kwargs)
751
 
        # Emit D-Bus signal
752
 
        self.PropertyChanged(
753
 
            dbus.String(u"last_checked_ok"),
754
 
            (self._datetime_to_dbus(self.last_checked_ok,
755
 
                                    variant_level=1)))
756
 
        return r
757
 
    
758
 
    def start_checker(self, *args, **kwargs):
759
 
        old_checker = self.checker
760
 
        if self.checker is not None:
761
 
            old_checker_pid = self.checker.pid
762
 
        else:
763
 
            old_checker_pid = None
764
 
        r = Client.start_checker(self, *args, **kwargs)
765
 
        # Only if new checker process was started
766
 
        if (self.checker is not None
767
 
            and old_checker_pid != self.checker.pid):
768
 
            # Emit D-Bus signal
769
 
            self.CheckerStarted(self.current_checker_command)
770
 
            self.PropertyChanged(
771
 
                dbus.String(u"checker_running"),
772
 
                dbus.Boolean(True, variant_level=1))
773
 
        return r
774
 
    
775
 
    def stop_checker(self, *args, **kwargs):
776
 
        old_checker = getattr(self, u"checker", None)
777
 
        r = Client.stop_checker(self, *args, **kwargs)
778
 
        if (old_checker is not None
779
 
            and getattr(self, u"checker", None) is None):
780
 
            self.PropertyChanged(dbus.String(u"checker_running"),
781
 
                                 dbus.Boolean(False, variant_level=1))
782
 
        return r
783
 
    
784
 
    ## D-Bus methods & signals
785
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
786
 
    
787
 
    # CheckedOK - method
788
 
    @dbus.service.method(_interface)
789
 
    def CheckedOK(self):
790
 
        return self.checked_ok()
791
 
    
792
 
    # CheckerCompleted - signal
793
 
    @dbus.service.signal(_interface, signature=u"nxs")
794
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
795
 
        "D-Bus signal"
796
 
        pass
797
 
    
798
 
    # CheckerStarted - signal
799
 
    @dbus.service.signal(_interface, signature=u"s")
800
 
    def CheckerStarted(self, command):
801
 
        "D-Bus signal"
802
 
        pass
803
 
    
804
 
    # PropertyChanged - signal
805
 
    @dbus.service.signal(_interface, signature=u"sv")
806
 
    def PropertyChanged(self, property, value):
807
 
        "D-Bus signal"
808
 
        pass
809
 
    
810
 
    # GotSecret - signal
811
 
    @dbus.service.signal(_interface)
812
 
    def GotSecret(self):
813
 
        "D-Bus signal"
814
 
        pass
815
 
    
816
 
    # Rejected - signal
817
 
    @dbus.service.signal(_interface)
818
 
    def Rejected(self):
819
 
        "D-Bus signal"
820
 
        pass
821
 
    
822
 
    # Enable - method
823
 
    @dbus.service.method(_interface)
824
 
    def Enable(self):
825
 
        "D-Bus method"
826
 
        self.enable()
827
 
    
828
 
    # StartChecker - method
829
 
    @dbus.service.method(_interface)
830
 
    def StartChecker(self):
831
 
        "D-Bus method"
832
 
        self.start_checker()
833
 
    
834
 
    # Disable - method
835
 
    @dbus.service.method(_interface)
836
 
    def Disable(self):
837
 
        "D-Bus method"
838
 
        self.disable()
839
 
    
840
 
    # StopChecker - method
841
 
    @dbus.service.method(_interface)
842
 
    def StopChecker(self):
843
 
        self.stop_checker()
844
 
    
845
 
    # name - property
846
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
847
 
    def name_dbus_property(self):
848
 
        return dbus.String(self.name)
849
 
    
850
 
    # fingerprint - property
851
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
852
 
    def fingerprint_dbus_property(self):
853
 
        return dbus.String(self.fingerprint)
854
 
    
855
 
    # host - property
856
 
    @dbus_service_property(_interface, signature=u"s",
857
 
                           access=u"readwrite")
858
 
    def host_dbus_property(self, value=None):
859
 
        if value is None:       # get
860
 
            return dbus.String(self.host)
861
 
        self.host = value
862
 
        # Emit D-Bus signal
863
 
        self.PropertyChanged(dbus.String(u"host"),
864
 
                             dbus.String(value, variant_level=1))
865
 
    
866
 
    # created - property
867
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
868
 
    def created_dbus_property(self):
869
 
        return dbus.String(self._datetime_to_dbus(self.created))
870
 
    
871
 
    # last_enabled - property
872
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
873
 
    def last_enabled_dbus_property(self):
874
 
        if self.last_enabled is None:
875
 
            return dbus.String(u"")
876
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
 
    
878
 
    # enabled - property
879
 
    @dbus_service_property(_interface, signature=u"b",
880
 
                           access=u"readwrite")
881
 
    def enabled_dbus_property(self, value=None):
882
 
        if value is None:       # get
883
 
            return dbus.Boolean(self.enabled)
884
 
        if value:
885
 
            self.enable()
886
 
        else:
887
 
            self.disable()
888
 
    
889
 
    # last_checked_ok - property
890
 
    @dbus_service_property(_interface, signature=u"s",
891
 
                           access=u"readwrite")
892
 
    def last_checked_ok_dbus_property(self, value=None):
893
 
        if value is not None:
894
 
            self.checked_ok()
895
 
            return
896
 
        if self.last_checked_ok is None:
897
 
            return dbus.String(u"")
898
 
        return dbus.String(self._datetime_to_dbus(self
899
 
                                                  .last_checked_ok))
900
 
    
901
 
    # timeout - property
902
 
    @dbus_service_property(_interface, signature=u"t",
903
 
                           access=u"readwrite")
904
 
    def timeout_dbus_property(self, value=None):
905
 
        if value is None:       # get
906
 
            return dbus.UInt64(self.timeout_milliseconds())
907
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
908
 
        # Emit D-Bus signal
909
 
        self.PropertyChanged(dbus.String(u"timeout"),
910
 
                             dbus.UInt64(value, variant_level=1))
911
 
        if getattr(self, u"disable_initiator_tag", None) is None:
912
 
            return
913
 
        # Reschedule timeout
914
 
        gobject.source_remove(self.disable_initiator_tag)
915
 
        self.disable_initiator_tag = None
916
 
        time_to_die = (self.
917
 
                       _timedelta_to_milliseconds((self
918
 
                                                   .last_checked_ok
919
 
                                                   + self.timeout)
920
 
                                                  - datetime.datetime
921
 
                                                  .utcnow()))
922
 
        if time_to_die <= 0:
923
 
            # The timeout has passed
924
 
            self.disable()
925
 
        else:
926
 
            self.disable_initiator_tag = (gobject.timeout_add
927
 
                                          (time_to_die, self.disable))
928
 
    
929
 
    # interval - property
930
 
    @dbus_service_property(_interface, signature=u"t",
931
 
                           access=u"readwrite")
932
 
    def interval_dbus_property(self, value=None):
933
 
        if value is None:       # get
934
 
            return dbus.UInt64(self.interval_milliseconds())
935
 
        self.interval = datetime.timedelta(0, 0, 0, value)
936
 
        # Emit D-Bus signal
937
 
        self.PropertyChanged(dbus.String(u"interval"),
938
 
                             dbus.UInt64(value, variant_level=1))
939
 
        if getattr(self, u"checker_initiator_tag", None) is None:
940
 
            return
941
 
        # Reschedule checker run
942
 
        gobject.source_remove(self.checker_initiator_tag)
943
 
        self.checker_initiator_tag = (gobject.timeout_add
944
 
                                      (value, self.start_checker))
945
 
        self.start_checker()    # Start one now, too
946
 
 
947
 
    # checker - property
948
 
    @dbus_service_property(_interface, signature=u"s",
949
 
                           access=u"readwrite")
950
 
    def checker_dbus_property(self, value=None):
951
 
        if value is None:       # get
952
 
            return dbus.String(self.checker_command)
953
 
        self.checker_command = value
954
 
        # Emit D-Bus signal
955
 
        self.PropertyChanged(dbus.String(u"checker"),
956
 
                             dbus.String(self.checker_command,
957
 
                                         variant_level=1))
958
 
    
959
 
    # checker_running - property
960
 
    @dbus_service_property(_interface, signature=u"b",
961
 
                           access=u"readwrite")
962
 
    def checker_running_dbus_property(self, value=None):
963
 
        if value is None:       # get
964
 
            return dbus.Boolean(self.checker is not None)
965
 
        if value:
966
 
            self.start_checker()
967
 
        else:
968
 
            self.stop_checker()
969
 
    
970
 
    # object_path - property
971
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
972
 
    def object_path_dbus_property(self):
973
 
        return self.dbus_object_path # is already a dbus.ObjectPath
974
 
    
975
 
    # secret = property
976
 
    @dbus_service_property(_interface, signature=u"ay",
977
 
                           access=u"write", byte_arrays=True)
978
 
    def secret_dbus_property(self, value):
979
 
        self.secret = str(value)
980
 
    
981
 
    del _interface
982
 
 
983
 
 
984
 
class ClientHandler(socketserver.BaseRequestHandler, object):
985
 
    """A class to handle client connections.
986
 
    
987
 
    Instantiated once for each connection to handle it.
 
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.
988
307
    Note: This will run in its own forked process."""
989
308
    
990
309
    def handle(self):
991
 
        logger.info(u"TCP connection from: %s",
992
 
                    unicode(self.client_address))
993
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
 
        # Open IPC pipe to parent process
995
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
 
            session = (gnutls.connection
997
 
                       .ClientSession(self.request,
998
 
                                      gnutls.connection
999
 
                                      .X509Credentials()))
1000
 
            
1001
 
            line = self.request.makefile().readline()
1002
 
            logger.debug(u"Protocol version: %r", line)
1003
 
            try:
1004
 
                if int(line.strip().split()[0]) > 1:
1005
 
                    raise RuntimeError
1006
 
            except (ValueError, IndexError, RuntimeError), error:
1007
 
                logger.error(u"Unknown protocol version: %s", error)
1008
 
                return
1009
 
            
1010
 
            # Note: gnutls.connection.X509Credentials is really a
1011
 
            # generic GnuTLS certificate credentials object so long as
1012
 
            # no X.509 keys are added to it.  Therefore, we can use it
1013
 
            # here despite using OpenPGP certificates.
1014
 
            
1015
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
 
            #                      u"+AES-256-CBC", u"+SHA1",
1017
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
 
            #                      u"+DHE-DSS"))
1019
 
            # Use a fallback default, since this MUST be set.
1020
 
            priority = self.server.gnutls_priority
1021
 
            if priority is None:
1022
 
                priority = u"NORMAL"
1023
 
            (gnutls.library.functions
1024
 
             .gnutls_priority_set_direct(session._c_object,
1025
 
                                         priority, None))
1026
 
            
1027
 
            try:
1028
 
                session.handshake()
1029
 
            except gnutls.errors.GNUTLSError, error:
1030
 
                logger.warning(u"Handshake failed: %s", error)
1031
 
                # Do not run session.bye() here: the session is not
1032
 
                # established.  Just abandon the request.
1033
 
                return
1034
 
            logger.debug(u"Handshake succeeded")
1035
 
            try:
1036
 
                fpr = self.fingerprint(self.peer_certificate(session))
1037
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
1038
 
                logger.warning(u"Bad certificate: %s", error)
1039
 
                session.bye()
1040
 
                return
1041
 
            logger.debug(u"Fingerprint: %s", fpr)
1042
 
            
1043
 
            for c in self.server.clients:
1044
 
                if c.fingerprint == fpr:
1045
 
                    client = c
1046
 
                    break
 
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))
1047
350
            else:
1048
 
                ipc.write(u"NOTFOUND %s %s\n"
1049
 
                          % (fpr, unicode(self.client_address)))
1050
 
                session.bye()
1051
 
                return
1052
 
            # Have to check if client.still_valid(), since it is
1053
 
            # possible that the client timed out while establishing
1054
 
            # the GnuTLS session.
1055
 
            if not client.still_valid():
1056
 
                ipc.write(u"INVALID %s\n" % client.name)
1057
 
                session.bye()
1058
 
                return
1059
 
            ipc.write(u"SENDING %s\n" % client.name)
1060
 
            sent_size = 0
1061
 
            while sent_size < len(client.secret):
1062
 
                sent = session.send(client.secret[sent_size:])
1063
 
                logger.debug(u"Sent: %d, remaining: %d",
1064
 
                             sent, len(client.secret)
1065
 
                             - (sent_size + sent))
1066
 
                sent_size += sent
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
1067
353
            session.bye()
1068
 
    
1069
 
    @staticmethod
1070
 
    def peer_certificate(session):
1071
 
        "Return the peer's OpenPGP certificate as a bytestring"
1072
 
        # If not an OpenPGP certificate...
1073
 
        if (gnutls.library.functions
1074
 
            .gnutls_certificate_type_get(session._c_object)
1075
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
 
            # ...do the normal thing
1077
 
            return session.peer_certificate
1078
 
        list_size = ctypes.c_uint(1)
1079
 
        cert_list = (gnutls.library.functions
1080
 
                     .gnutls_certificate_get_peers
1081
 
                     (session._c_object, ctypes.byref(list_size)))
1082
 
        if not bool(cert_list) and list_size.value != 0:
1083
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
 
                                            u" certificate")
1085
 
        if list_size.value == 0:
1086
 
            return None
1087
 
        cert = cert_list[0]
1088
 
        return ctypes.string_at(cert.data, cert.size)
1089
 
    
1090
 
    @staticmethod
1091
 
    def fingerprint(openpgp):
1092
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1093
 
        # New GnuTLS "datum" with the OpenPGP public key
1094
 
        datum = (gnutls.library.types
1095
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
 
                                             ctypes.POINTER
1097
 
                                             (ctypes.c_ubyte)),
1098
 
                                 ctypes.c_uint(len(openpgp))))
1099
 
        # New empty GnuTLS certificate
1100
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
 
        (gnutls.library.functions
1102
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1103
 
        # Import the OpenPGP public key into the certificate
1104
 
        (gnutls.library.functions
1105
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
 
                                    gnutls.library.constants
1107
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1108
 
        # Verify the self signature in the key
1109
 
        crtverify = ctypes.c_uint()
1110
 
        (gnutls.library.functions
1111
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1112
 
                                         ctypes.byref(crtverify)))
1113
 
        if crtverify.value != 0:
1114
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
 
            raise (gnutls.errors.CertificateSecurityError
1116
 
                   (u"Verify failed"))
1117
 
        # New buffer for the fingerprint
1118
 
        buf = ctypes.create_string_buffer(20)
1119
 
        buf_len = ctypes.c_size_t()
1120
 
        # Get the fingerprint from the certificate into the buffer
1121
 
        (gnutls.library.functions
1122
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
 
                                             ctypes.byref(buf_len)))
1124
 
        # Deinit the certificate
1125
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1126
 
        # Convert the buffer to a Python bytestring
1127
 
        fpr = ctypes.string_at(buf, buf_len.value)
1128
 
        # Convert the bytestring to hexadecimal notation
1129
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1130
 
        return hex_fpr
1131
 
 
1132
 
 
1133
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
 
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
1135
 
    def process_request(self, request, client_address):
1136
 
        """Overrides and wraps the original process_request().
1137
 
        
1138
 
        This function creates a new pipe in self.pipe
1139
 
        """
1140
 
        self.pipe = os.pipe()
1141
 
        super(ForkingMixInWithPipe,
1142
 
              self).process_request(request, client_address)
1143
 
        os.close(self.pipe[1])  # close write end
1144
 
        self.add_pipe(self.pipe[0])
1145
 
    def add_pipe(self, pipe):
1146
 
        """Dummy function; override as necessary"""
1147
 
        os.close(pipe)
1148
 
 
1149
 
 
1150
 
class IPv6_TCPServer(ForkingMixInWithPipe,
1151
 
                     socketserver.TCPServer, object):
1152
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1153
 
    
 
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.
1154
367
    Attributes:
1155
 
        enabled:        Boolean; whether this server is activated yet
1156
 
        interface:      None or a network interface name (string)
1157
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1158
370
    """
1159
 
    def __init__(self, server_address, RequestHandlerClass,
1160
 
                 interface=None, use_ipv6=True):
1161
 
        self.interface = interface
1162
 
        if use_ipv6:
1163
 
            self.address_family = socket.AF_INET6
1164
 
        socketserver.TCPServer.__init__(self, server_address,
1165
 
                                        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)
1166
380
    def server_bind(self):
1167
381
        """This overrides the normal server_bind() function
1168
382
        to bind to an interface if one was specified, and also NOT to
1169
383
        bind to an address or port if they were not specified."""
1170
 
        if self.interface is not None:
1171
 
            if SO_BINDTODEVICE is None:
1172
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1173
 
                             u" cannot bind to interface %s",
1174
 
                             self.interface)
1175
 
            else:
1176
 
                try:
1177
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1178
 
                                           SO_BINDTODEVICE,
1179
 
                                           str(self.interface
1180
 
                                               + u'\0'))
1181
 
                except socket.error, error:
1182
 
                    if error[0] == errno.EPERM:
1183
 
                        logger.error(u"No permission to"
1184
 
                                     u" bind to interface %s",
1185
 
                                     self.interface)
1186
 
                    elif error[0] == errno.ENOPROTOOPT:
1187
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1188
 
                                     u" cannot bind to interface %s",
1189
 
                                     self.interface)
1190
 
                    else:
1191
 
                        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
1192
399
        # Only bind(2) the socket if we really need to.
1193
400
        if self.server_address[0] or self.server_address[1]:
1194
401
            if not self.server_address[0]:
1195
 
                if self.address_family == socket.AF_INET6:
1196
 
                    any_address = u"::" # in6addr_any
1197
 
                else:
1198
 
                    any_address = socket.INADDR_ANY
1199
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
1200
404
                                       self.server_address[1])
1201
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
1202
406
                self.server_address = (self.server_address[0],
1203
407
                                       0)
1204
 
#                 if self.interface:
1205
 
#                     self.server_address = (self.server_address[0],
1206
 
#                                            0, # port
1207
 
#                                            0, # flowinfo
1208
 
#                                            if_nametoindex
1209
 
#                                            (self.interface))
1210
 
            return socketserver.TCPServer.server_bind(self)
1211
 
 
1212
 
 
1213
 
class MandosServer(IPv6_TCPServer):
1214
 
    """Mandos server.
1215
 
    
1216
 
    Attributes:
1217
 
        clients:        set of Client objects
1218
 
        gnutls_priority GnuTLS priority string
1219
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1220
 
    
1221
 
    Assumes a gobject.MainLoop event loop.
1222
 
    """
1223
 
    def __init__(self, server_address, RequestHandlerClass,
1224
 
                 interface=None, use_ipv6=True, clients=None,
1225
 
                 gnutls_priority=None, use_dbus=True):
1226
 
        self.enabled = False
1227
 
        self.clients = clients
1228
 
        if self.clients is None:
1229
 
            self.clients = set()
1230
 
        self.use_dbus = use_dbus
1231
 
        self.gnutls_priority = gnutls_priority
1232
 
        IPv6_TCPServer.__init__(self, server_address,
1233
 
                                RequestHandlerClass,
1234
 
                                interface = interface,
1235
 
                                use_ipv6 = use_ipv6)
1236
 
    def server_activate(self):
1237
 
        if self.enabled:
1238
 
            return socketserver.TCPServer.server_activate(self)
1239
 
    def enable(self):
1240
 
        self.enabled = True
1241
 
    def add_pipe(self, pipe):
1242
 
        # Call "handle_ipc" for both data and EOF events
1243
 
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
 
                             self.handle_ipc)
1245
 
    def handle_ipc(self, source, condition, file_objects={}):
1246
 
        condition_names = {
1247
 
            gobject.IO_IN: u"IN",   # There is data to read.
1248
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1249
 
                                    # blocking).
1250
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
 
            gobject.IO_ERR: u"ERR", # Error condition.
1252
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1253
 
                                    # broken, usually for pipes and
1254
 
                                    # sockets).
1255
 
            }
1256
 
        conditions_string = ' | '.join(name
1257
 
                                       for cond, name in
1258
 
                                       condition_names.iteritems()
1259
 
                                       if cond & condition)
1260
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
 
                     conditions_string)
1262
 
        
1263
 
        # Turn the pipe file descriptor into a Python file object
1264
 
        if source not in file_objects:
1265
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1266
 
        
1267
 
        # Read a line from the file object
1268
 
        cmdline = file_objects[source].readline()
1269
 
        if not cmdline:             # Empty line means end of file
1270
 
            # close the IPC pipe
1271
 
            file_objects[source].close()
1272
 
            del file_objects[source]
1273
 
            
1274
 
            # Stop calling this function
1275
 
            return False
1276
 
        
1277
 
        logger.debug(u"IPC command: %r", cmdline)
1278
 
        
1279
 
        # Parse and act on command
1280
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
 
        
1282
 
        if cmd == u"NOTFOUND":
1283
 
            fpr, address = args.split(None, 1)
1284
 
            logger.warning(u"Client not found for fingerprint: %s, ad"
1285
 
                           u"dress: %s", fpr, address)
1286
 
            if self.use_dbus:
1287
 
                # Emit D-Bus signal
1288
 
                mandos_dbus_service.ClientNotFound(fpr, address)
1289
 
        elif cmd == u"INVALID":
1290
 
            for client in self.clients:
1291
 
                if client.name == args:
1292
 
                    logger.warning(u"Client %s is invalid", args)
1293
 
                    if self.use_dbus:
1294
 
                        # Emit D-Bus signal
1295
 
                        client.Rejected()
1296
 
                    break
1297
 
            else:
1298
 
                logger.error(u"Unknown client %s is invalid", args)
1299
 
        elif cmd == u"SENDING":
1300
 
            for client in self.clients:
1301
 
                if client.name == args:
1302
 
                    logger.info(u"Sending secret to %s", client.name)
1303
 
                    client.checked_ok()
1304
 
                    if self.use_dbus:
1305
 
                        # Emit D-Bus signal
1306
 
                        client.GotSecret()
1307
 
                    break
1308
 
            else:
1309
 
                logger.error(u"Sending secret to unknown client %s",
1310
 
                             args)
1311
 
        else:
1312
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1313
 
        
1314
 
        # Keep calling this function
1315
 
        return True
 
408
            return super(type(self), self).server_bind()
1316
409
 
1317
410
 
1318
411
def string_to_delta(interval):
1319
412
    """Parse a string and return a datetime.timedelta
1320
 
    
1321
 
    >>> string_to_delta(u'7d')
 
413
 
 
414
    >>> string_to_delta('7d')
1322
415
    datetime.timedelta(7)
1323
 
    >>> string_to_delta(u'60s')
 
416
    >>> string_to_delta('60s')
1324
417
    datetime.timedelta(0, 60)
1325
 
    >>> string_to_delta(u'60m')
 
418
    >>> string_to_delta('60m')
1326
419
    datetime.timedelta(0, 3600)
1327
 
    >>> string_to_delta(u'24h')
 
420
    >>> string_to_delta('24h')
1328
421
    datetime.timedelta(1)
1329
422
    >>> string_to_delta(u'1w')
1330
423
    datetime.timedelta(7)
1331
 
    >>> string_to_delta(u'5m 30s')
1332
 
    datetime.timedelta(0, 330)
1333
424
    """
1334
 
    timevalue = datetime.timedelta(0)
1335
 
    for s in interval.split():
1336
 
        try:
1337
 
            suffix = unicode(s[-1])
1338
 
            value = int(s[:-1])
1339
 
            if suffix == u"d":
1340
 
                delta = datetime.timedelta(value)
1341
 
            elif suffix == u"s":
1342
 
                delta = datetime.timedelta(0, value)
1343
 
            elif suffix == u"m":
1344
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
1345
 
            elif suffix == u"h":
1346
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1347
 
            elif suffix == u"w":
1348
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1349
 
            else:
1350
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1351
 
        except (ValueError, IndexError), e:
1352
 
            raise ValueError(e.message)
1353
 
        timevalue += delta
1354
 
    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
1355
515
 
1356
516
 
1357
517
def if_nametoindex(interface):
1358
 
    """Call the C function if_nametoindex(), or equivalent
1359
 
    
1360
 
    Note: This function cannot accept a unicode string."""
1361
 
    global if_nametoindex
 
518
    """Call the C function if_nametoindex()"""
1362
519
    try:
1363
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1364
 
                          (ctypes.util.find_library(u"c"))
1365
 
                          .if_nametoindex)
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
1366
522
    except (OSError, AttributeError):
1367
 
        logger.warning(u"Doing if_nametoindex the hard way")
1368
 
        def if_nametoindex(interface):
1369
 
            "Get an interface index the hard way, i.e. using fcntl()"
1370
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1371
 
            with closing(socket.socket()) as s:
1372
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1373
 
                                    struct.pack(str(u"16s16x"),
1374
 
                                                interface))
1375
 
            interface_index = struct.unpack(str(u"I"),
1376
 
                                            ifreq[16:20])[0]
1377
 
            return interface_index
1378
 
    return if_nametoindex(interface)
1379
 
 
1380
 
 
1381
 
def daemon(nochdir = False, noclose = False):
1382
 
    """See daemon(3).  Standard BSD Unix function.
1383
 
    
1384
 
    This should really exist as os.daemon, but it doesn't (yet)."""
1385
 
    if os.fork():
1386
 
        sys.exit()
1387
 
    os.setsid()
1388
 
    if not nochdir:
1389
 
        os.chdir(u"/")
1390
 
    if os.fork():
1391
 
        sys.exit()
1392
 
    if not noclose:
1393
 
        # Close all standard open file descriptors
1394
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1395
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1396
 
            raise OSError(errno.ENODEV,
1397
 
                          u"%s not a character device"
1398
 
                          % os.path.devnull)
1399
 
        os.dup2(null, sys.stdin.fileno())
1400
 
        os.dup2(null, sys.stdout.fileno())
1401
 
        os.dup2(null, sys.stderr.fileno())
1402
 
        if null > 2:
1403
 
            os.close(null)
1404
 
 
1405
 
 
1406
 
def main():
1407
 
    
1408
 
    ##################################################################
1409
 
    # Parsing of options, both command line and config file
1410
 
    
1411
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1412
 
    parser.add_option("-i", u"--interface", type=u"string",
1413
 
                      metavar="IF", help=u"Bind to interface IF")
1414
 
    parser.add_option("-a", u"--address", type=u"string",
1415
 
                      help=u"Address to listen for requests on")
1416
 
    parser.add_option("-p", u"--port", type=u"int",
1417
 
                      help=u"Port number to receive requests on")
1418
 
    parser.add_option("--check", action=u"store_true",
1419
 
                      help=u"Run self-test")
1420
 
    parser.add_option("--debug", action=u"store_true",
1421
 
                      help=u"Debug mode; run in foreground and log to"
1422
 
                      u" terminal")
1423
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1424
 
                      u" priority string (see GnuTLS documentation)")
1425
 
    parser.add_option("--servicename", type=u"string",
1426
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1427
 
    parser.add_option("--configdir", type=u"string",
1428
 
                      default=u"/etc/mandos", metavar=u"DIR",
1429
 
                      help=u"Directory to search for configuration"
1430
 
                      u" files")
1431
 
    parser.add_option("--no-dbus", action=u"store_false",
1432
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1433
 
                      u" system bus interface")
1434
 
    parser.add_option("--no-ipv6", action=u"store_false",
1435
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
1436
 
    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()
1437
566
    
1438
567
    if options.check:
1439
568
        import doctest
1440
569
        doctest.testmod()
1441
570
        sys.exit()
1442
571
    
1443
 
    # Default values for config file for server-global settings
1444
 
    server_defaults = { u"interface": u"",
1445
 
                        u"address": u"",
1446
 
                        u"port": u"",
1447
 
                        u"debug": u"False",
1448
 
                        u"priority":
1449
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1450
 
                        u"servicename": u"Mandos",
1451
 
                        u"use_dbus": u"True",
1452
 
                        u"use_ipv6": u"True",
1453
 
                        }
1454
 
    
1455
 
    # Parse config file for server-global settings
1456
 
    server_config = configparser.SafeConfigParser(server_defaults)
1457
 
    del server_defaults
1458
 
    server_config.read(os.path.join(options.configdir,
1459
 
                                    u"mandos.conf"))
1460
 
    # Convert the SafeConfigParser object to a dict
1461
 
    server_settings = server_config.defaults()
1462
 
    # Use the appropriate methods on the non-string config options
1463
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1464
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1465
 
                                                           option)
1466
 
    if server_settings["port"]:
1467
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1468
 
                                                       u"port")
1469
 
    del server_config
1470
 
    
1471
 
    # Override the settings from the config file with command line
1472
 
    # options, if set.
1473
 
    for option in (u"interface", u"address", u"port", u"debug",
1474
 
                   u"priority", u"servicename", u"configdir",
1475
 
                   u"use_dbus", u"use_ipv6"):
1476
 
        value = getattr(options, option)
1477
 
        if value is not None:
1478
 
            server_settings[option] = value
1479
 
    del options
1480
 
    # Force all strings to be unicode
1481
 
    for option in server_settings.keys():
1482
 
        if type(server_settings[option]) is str:
1483
 
            server_settings[option] = unicode(server_settings[option])
1484
 
    # Now we have our good server settings in "server_settings"
1485
 
    
1486
 
    ##################################################################
1487
 
    
1488
 
    # For convenience
1489
 
    debug = server_settings[u"debug"]
1490
 
    use_dbus = server_settings[u"use_dbus"]
1491
 
    use_ipv6 = server_settings[u"use_ipv6"]
1492
 
    
1493
 
    if not debug:
1494
 
        syslogger.setLevel(logging.WARNING)
1495
 
        console.setLevel(logging.WARNING)
1496
 
    
1497
 
    if server_settings[u"servicename"] != u"Mandos":
1498
 
        syslogger.setFormatter(logging.Formatter
1499
 
                               (u'Mandos (%s) [%%(process)d]:'
1500
 
                                u' %%(levelname)s: %%(message)s'
1501
 
                                % server_settings[u"servicename"]))
1502
 
    
1503
 
    # Parse config file with clients
1504
 
    client_defaults = { u"timeout": u"1h",
1505
 
                        u"interval": u"5m",
1506
 
                        u"checker": u"fping -q -- %%(host)s",
1507
 
                        u"host": u"",
1508
 
                        }
1509
 
    client_config = configparser.SafeConfigParser(client_defaults)
1510
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1511
 
                                    u"clients.conf"))
1512
 
    
1513
 
    global mandos_dbus_service
1514
 
    mandos_dbus_service = None
1515
 
    
1516
 
    tcp_server = MandosServer((server_settings[u"address"],
1517
 
                               server_settings[u"port"]),
1518
 
                              ClientHandler,
1519
 
                              interface=server_settings[u"interface"],
1520
 
                              use_ipv6=use_ipv6,
1521
 
                              gnutls_priority=
1522
 
                              server_settings[u"priority"],
1523
 
                              use_dbus=use_dbus)
1524
 
    pidfilename = u"/var/run/mandos.pid"
1525
 
    try:
1526
 
        pidfile = open(pidfilename, u"w")
1527
 
    except IOError:
1528
 
        logger.error(u"Could not open file %r", pidfilename)
1529
 
    
1530
 
    try:
1531
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1532
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1533
 
    except KeyError:
1534
 
        try:
1535
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1536
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1537
 
        except KeyError:
1538
 
            try:
1539
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1540
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1541
 
            except KeyError:
1542
 
                uid = 65534
1543
 
                gid = 65534
1544
 
    try:
1545
 
        os.setgid(gid)
1546
 
        os.setuid(uid)
1547
 
    except OSError, error:
1548
 
        if error[0] != errno.EPERM:
1549
 
            raise error
1550
 
    
1551
 
    # Enable all possible GnuTLS debugging
1552
 
    if debug:
1553
 
        # "Use a log level over 10 to enable all debugging options."
1554
 
        # - GnuTLS manual
1555
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1556
 
        
1557
 
        @gnutls.library.types.gnutls_log_func
1558
 
        def debug_gnutls(level, string):
1559
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1560
 
        
1561
 
        (gnutls.library.functions
1562
 
         .gnutls_global_set_log_function(debug_gnutls))
1563
 
    
1564
 
    global main_loop
1565
 
    # 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
1566
589
    DBusGMainLoop(set_as_default=True )
1567
590
    main_loop = gobject.MainLoop()
1568
591
    bus = dbus.SystemBus()
1569
 
    # End of Avahi example code
1570
 
    if use_dbus:
1571
 
        try:
1572
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1573
 
                                            bus, do_not_queue=True)
1574
 
        except dbus.exceptions.NameExistsException, e:
1575
 
            logger.error(unicode(e) + u", disabling D-Bus")
1576
 
            use_dbus = False
1577
 
            server_settings[u"use_dbus"] = False
1578
 
            tcp_server.use_dbus = False
1579
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1580
 
    service = AvahiService(name = server_settings[u"servicename"],
1581
 
                           servicetype = u"_mandos._tcp",
1582
 
                           protocol = protocol, bus = bus)
1583
 
    if server_settings["interface"]:
1584
 
        service.interface = (if_nametoindex
1585
 
                             (str(server_settings[u"interface"])))
1586
 
    
1587
 
    client_class = Client
1588
 
    if use_dbus:
1589
 
        client_class = functools.partial(ClientDBus, bus = bus)
1590
 
    tcp_server.clients.update(set(
1591
 
            client_class(name = section,
1592
 
                         config= dict(client_config.items(section)))
1593
 
            for section in client_config.sections()))
1594
 
    if not tcp_server.clients:
1595
 
        logger.warning(u"No clients defined")
1596
 
    
1597
 
    if debug:
1598
 
        # Redirect stdin so all checkers get /dev/null
1599
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1600
 
        os.dup2(null, sys.stdin.fileno())
1601
 
        if null > 2:
1602
 
            os.close(null)
1603
 
    else:
1604
 
        # No console logging
1605
 
        logger.removeHandler(console)
1606
 
        # Close all input and output, do double fork, etc.
1607
 
        daemon()
1608
 
    
1609
 
    try:
1610
 
        with closing(pidfile):
1611
 
            pid = os.getpid()
1612
 
            pidfile.write(str(pid) + "\n")
1613
 
        del pidfile
1614
 
    except IOError:
1615
 
        logger.error(u"Could not write to file %r with PID %d",
1616
 
                     pidfilename, pid)
1617
 
    except NameError:
1618
 
        # "pidfile" was never created
1619
 
        pass
1620
 
    del pidfilename
1621
 
    
1622
 
    if not debug:
1623
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1624
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1625
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1626
 
    
1627
 
    if use_dbus:
1628
 
        class MandosDBusService(dbus.service.Object):
1629
 
            """A D-Bus proxy object"""
1630
 
            def __init__(self):
1631
 
                dbus.service.Object.__init__(self, bus, u"/")
1632
 
            _interface = u"se.bsnet.fukt.Mandos"
1633
 
            
1634
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1635
 
            def ClientAdded(self, objpath, properties):
1636
 
                "D-Bus signal"
1637
 
                pass
1638
 
            
1639
 
            @dbus.service.signal(_interface, signature=u"ss")
1640
 
            def ClientNotFound(self, fingerprint, address):
1641
 
                "D-Bus signal"
1642
 
                pass
1643
 
            
1644
 
            @dbus.service.signal(_interface, signature=u"os")
1645
 
            def ClientRemoved(self, objpath, name):
1646
 
                "D-Bus signal"
1647
 
                pass
1648
 
            
1649
 
            @dbus.service.method(_interface, out_signature=u"ao")
1650
 
            def GetAllClients(self):
1651
 
                "D-Bus method"
1652
 
                return dbus.Array(c.dbus_object_path
1653
 
                                  for c in tcp_server.clients)
1654
 
            
1655
 
            @dbus.service.method(_interface,
1656
 
                                 out_signature=u"a{oa{sv}}")
1657
 
            def GetAllClientsWithProperties(self):
1658
 
                "D-Bus method"
1659
 
                return dbus.Dictionary(
1660
 
                    ((c.dbus_object_path, c.GetAll(u""))
1661
 
                     for c in tcp_server.clients),
1662
 
                    signature=u"oa{sv}")
1663
 
            
1664
 
            @dbus.service.method(_interface, in_signature=u"o")
1665
 
            def RemoveClient(self, object_path):
1666
 
                "D-Bus method"
1667
 
                for c in tcp_server.clients:
1668
 
                    if c.dbus_object_path == object_path:
1669
 
                        tcp_server.clients.remove(c)
1670
 
                        c.remove_from_connection()
1671
 
                        # Don't signal anything except ClientRemoved
1672
 
                        c.disable(quiet=True)
1673
 
                        # Emit D-Bus signal
1674
 
                        self.ClientRemoved(object_path, c.name)
1675
 
                        return
1676
 
                raise KeyError(object_path)
1677
 
            
1678
 
            del _interface
1679
 
        
1680
 
        mandos_dbus_service = MandosDBusService()
1681
 
    
1682
 
    def cleanup():
1683
 
        "Cleanup function; run on exit"
1684
 
        service.cleanup()
1685
 
        
1686
 
        while tcp_server.clients:
1687
 
            client = tcp_server.clients.pop()
1688
 
            if use_dbus:
1689
 
                client.remove_from_connection()
1690
 
            client.disable_hook = None
1691
 
            # Don't signal anything except ClientRemoved
1692
 
            client.disable(quiet=True)
1693
 
            if use_dbus:
1694
 
                # Emit D-Bus signal
1695
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1696
 
                                                  client.name)
1697
 
    
1698
 
    atexit.register(cleanup)
1699
 
    
1700
 
    for client in tcp_server.clients:
1701
 
        if use_dbus:
1702
 
            # Emit D-Bus signal
1703
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1704
 
                                            client.GetAll(u""))
1705
 
        client.enable()
1706
 
    
1707
 
    tcp_server.enable()
1708
 
    tcp_server.server_activate()
1709
 
    
1710
 
    # Find out what port we got
1711
 
    service.port = tcp_server.socket.getsockname()[1]
1712
 
    if use_ipv6:
1713
 
        logger.info(u"Now listening on address %r, port %d,"
1714
 
                    " flowinfo %d, scope_id %d"
1715
 
                    % tcp_server.socket.getsockname())
1716
 
    else:                       # IPv4
1717
 
        logger.info(u"Now listening on address %r, port %d"
1718
 
                    % tcp_server.socket.getsockname())
1719
 
    
1720
 
    #service.interface = tcp_server.socket.getsockname()[3]
1721
 
    
1722
 
    try:
1723
 
        # From the Avahi example code
1724
 
        try:
1725
 
            service.activate()
1726
 
        except dbus.exceptions.DBusException, error:
1727
 
            logger.critical(u"DBusException: %s", error)
1728
 
            cleanup()
1729
 
            sys.exit(1)
1730
 
        # End of Avahi example code
1731
 
        
1732
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1733
 
                             lambda *args, **kwargs:
1734
 
                             (tcp_server.handle_request
1735
 
                              (*args[2:], **kwargs) or True))
1736
 
        
1737
 
        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:
1738
635
        main_loop.run()
1739
 
    except AvahiError, error:
1740
 
        logger.critical(u"AvahiError: %s", error)
1741
 
        cleanup()
1742
 
        sys.exit(1)
1743
636
    except KeyboardInterrupt:
1744
 
        if debug:
1745
 
            print >> sys.stderr
1746
 
        logger.debug(u"Server received KeyboardInterrupt")
1747
 
    logger.debug(u"Server exiting")
1748
 
    # Must run before the D-Bus bus name gets deregistered
1749
 
    cleanup()
 
637
        print
 
638
    
 
639
    # Cleanup here
1750
640
 
1751
 
if __name__ == '__main__':
1752
 
    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()