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  • Committer: Teddy Hogeborn
  • Date: 2008-09-13 15:36:18 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
                                   errors.

* README: Kill the straight quotes.  Add copyright notice.

* overview.xml: Improved wording.

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Lines of Context:
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import division, with_statement, absolute_import
 
33
from __future__ import division
35
34
 
36
 
import SocketServer as socketserver
 
35
import SocketServer
37
36
import socket
38
 
import optparse
 
37
import select
 
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
 
import ConfigParser as configparser
 
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
 
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
 
import contextlib
59
 
import struct
60
 
import fcntl
61
 
import functools
62
 
import cPickle as pickle
63
 
import select
64
59
 
65
60
import dbus
66
 
import dbus.service
67
61
import gobject
68
62
import avahi
69
63
from dbus.mainloop.glib import DBusGMainLoop
70
64
import ctypes
71
 
import ctypes.util
72
 
import xml.dom.minidom
73
 
import inspect
74
 
 
75
 
try:
76
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
 
except AttributeError:
78
 
    try:
79
 
        from IN import SO_BINDTODEVICE
80
 
    except ImportError:
81
 
        SO_BINDTODEVICE = None
82
 
 
83
 
 
84
 
version = "1.0.14"
85
 
 
86
 
logger = logging.Logger(u'mandos')
87
 
syslogger = (logging.handlers.SysLogHandler
88
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
 
              address = "/dev/log"))
90
 
syslogger.setFormatter(logging.Formatter
91
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
92
 
                        u' %(message)s'))
 
65
 
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
93
74
logger.addHandler(syslogger)
94
75
 
95
76
console = logging.StreamHandler()
96
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
 
                                       u' %(levelname)s:'
98
 
                                       u' %(message)s'))
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
99
79
logger.addHandler(console)
100
80
 
101
81
class AvahiError(Exception):
102
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
103
83
        self.value = value
104
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
105
 
    def __unicode__(self):
106
 
        return unicode(repr(self.value))
 
84
    def __str__(self):
 
85
        return repr(self.value)
107
86
 
108
87
class AvahiServiceError(AvahiError):
109
88
    pass
114
93
 
115
94
class AvahiService(object):
116
95
    """An Avahi (Zeroconf) service.
117
 
    
118
96
    Attributes:
119
97
    interface: integer; avahi.IF_UNSPEC or an interface index.
120
98
               Used to optionally bind to the specified interface.
121
 
    name: string; Example: u'Mandos'
122
 
    type: string; Example: u'_mandos._tcp'.
 
99
    name: string; Example: 'Mandos'
 
100
    type: string; Example: '_mandos._tcp'.
123
101
                  See <http://www.dns-sd.org/ServiceTypes.html>
124
102
    port: integer; what port to announce
125
103
    TXT: list of strings; TXT record for the service
128
106
    max_renames: integer; maximum number of renames
129
107
    rename_count: integer; counter so we only rename after collisions
130
108
                  a sensible number of times
131
 
    group: D-Bus Entry Group
132
 
    server: D-Bus Server
133
 
    bus: dbus.SystemBus()
134
109
    """
135
110
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
 
                 servicetype = None, port = None, TXT = None,
137
 
                 domain = u"", host = u"", max_renames = 32768,
138
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
111
                 type = None, port = None, TXT = None, domain = "",
 
112
                 host = "", max_renames = 32768):
139
113
        self.interface = interface
140
114
        self.name = name
141
 
        self.type = servicetype
 
115
        self.type = type
142
116
        self.port = port
143
 
        self.TXT = TXT if TXT is not None else []
 
117
        if TXT is None:
 
118
            self.TXT = []
 
119
        else:
 
120
            self.TXT = TXT
144
121
        self.domain = domain
145
122
        self.host = host
146
123
        self.rename_count = 0
147
124
        self.max_renames = max_renames
148
 
        self.protocol = protocol
149
 
        self.group = None       # our entry group
150
 
        self.server = None
151
 
        self.bus = bus
152
125
    def rename(self):
153
126
        """Derived from the Avahi example code"""
154
127
        if self.rename_count >= self.max_renames:
155
128
            logger.critical(u"No suitable Zeroconf service name found"
156
129
                            u" after %i retries, exiting.",
157
 
                            self.rename_count)
158
 
            raise AvahiServiceError(u"Too many renames")
159
 
        self.name = self.server.GetAlternativeServiceName(self.name)
 
130
                            rename_count)
 
131
            raise AvahiServiceError("Too many renames")
 
132
        self.name = server.GetAlternativeServiceName(self.name)
160
133
        logger.info(u"Changing Zeroconf service name to %r ...",
161
 
                    unicode(self.name))
162
 
        syslogger.setFormatter(logging.Formatter
163
 
                               (u'Mandos (%s) [%%(process)d]:'
164
 
                                u' %%(levelname)s: %%(message)s'
165
 
                                % self.name))
 
134
                    str(self.name))
 
135
        syslogger.setFormatter(logging.Formatter\
 
136
                               ('Mandos (%s): %%(levelname)s:'
 
137
                               ' %%(message)s' % self.name))
166
138
        self.remove()
167
139
        self.add()
168
140
        self.rename_count += 1
169
141
    def remove(self):
170
142
        """Derived from the Avahi example code"""
171
 
        if self.group is not None:
172
 
            self.group.Reset()
 
143
        if group is not None:
 
144
            group.Reset()
173
145
    def add(self):
174
146
        """Derived from the Avahi example code"""
175
 
        if self.group is None:
176
 
            self.group = dbus.Interface(
177
 
                self.bus.get_object(avahi.DBUS_NAME,
178
 
                                    self.server.EntryGroupNew()),
179
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
 
            self.group.connect_to_signal('StateChanged',
181
 
                                         self
182
 
                                         .entry_group_state_changed)
 
147
        global group
 
148
        if group is None:
 
149
            group = dbus.Interface\
 
150
                    (bus.get_object(avahi.DBUS_NAME,
 
151
                                    server.EntryGroupNew()),
 
152
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
            group.connect_to_signal('StateChanged',
 
154
                                    entry_group_state_changed)
183
155
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
 
                     self.name, self.type)
185
 
        self.group.AddService(
186
 
            self.interface,
187
 
            self.protocol,
188
 
            dbus.UInt32(0),     # flags
189
 
            self.name, self.type,
190
 
            self.domain, self.host,
191
 
            dbus.UInt16(self.port),
192
 
            avahi.string_array_to_txt_array(self.TXT))
193
 
        self.group.Commit()
194
 
    def entry_group_state_changed(self, state, error):
195
 
        """Derived from the Avahi example code"""
196
 
        logger.debug(u"Avahi entry group state change: %i", state)
197
 
        
198
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
 
            logger.debug(u"Zeroconf service established.")
200
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
201
 
            logger.warning(u"Zeroconf service name collision.")
202
 
            self.rename()
203
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
204
 
            logger.critical(u"Avahi: Error in group state changed %s",
205
 
                            unicode(error))
206
 
            raise AvahiGroupError(u"State changed: %s"
207
 
                                  % unicode(error))
208
 
    def cleanup(self):
209
 
        """Derived from the Avahi example code"""
210
 
        if self.group is not None:
211
 
            self.group.Free()
212
 
            self.group = None
213
 
    def server_state_changed(self, state):
214
 
        """Derived from the Avahi example code"""
215
 
        logger.debug(u"Avahi server state change: %i", state)
216
 
        if state == avahi.SERVER_COLLISION:
217
 
            logger.error(u"Zeroconf server name collision")
218
 
            self.remove()
219
 
        elif state == avahi.SERVER_RUNNING:
220
 
            self.add()
221
 
    def activate(self):
222
 
        """Derived from the Avahi example code"""
223
 
        if self.server is None:
224
 
            self.server = dbus.Interface(
225
 
                self.bus.get_object(avahi.DBUS_NAME,
226
 
                                    avahi.DBUS_PATH_SERVER),
227
 
                avahi.DBUS_INTERFACE_SERVER)
228
 
        self.server.connect_to_signal(u"StateChanged",
229
 
                                 self.server_state_changed)
230
 
        self.server_state_changed(self.server.GetState())
 
156
                     service.name, service.type)
 
157
        group.AddService(
 
158
                self.interface,         # interface
 
159
                avahi.PROTO_INET6,      # protocol
 
160
                dbus.UInt32(0),         # flags
 
161
                self.name, self.type,
 
162
                self.domain, self.host,
 
163
                dbus.UInt16(self.port),
 
164
                avahi.string_array_to_txt_array(self.TXT))
 
165
        group.Commit()
 
166
 
 
167
# From the Avahi example code:
 
168
group = None                            # our entry group
 
169
# End of Avahi example code
231
170
 
232
171
 
233
172
class Client(object):
234
173
    """A representation of a client host served by this server.
235
 
    
236
174
    Attributes:
237
 
    name:       string; from the config file, used in log messages and
238
 
                        D-Bus identifiers
 
175
    name:      string; from the config file, used in log messages
239
176
    fingerprint: string (40 or 32 hexadecimal digits); used to
240
177
                 uniquely identify the client
241
 
    secret:     bytestring; sent verbatim (over TLS) to client
242
 
    host:       string; available for use by the checker command
243
 
    created:    datetime.datetime(); (UTC) object creation
244
 
    last_enabled: datetime.datetime(); (UTC)
245
 
    enabled:    bool()
246
 
    last_checked_ok: datetime.datetime(); (UTC) or None
247
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
248
 
                                      until this client is disabled
249
 
    interval:   datetime.timedelta(); How often to start a new checker
250
 
    disable_hook:  If set, called by disable() as disable_hook(self)
251
 
    checker:    subprocess.Popen(); a running checker process used
252
 
                                    to see if the client lives.
253
 
                                    'None' if no process is running.
 
178
    secret:    bytestring; sent verbatim (over TLS) to client
 
179
    host:      string; available for use by the checker command
 
180
    created:   datetime.datetime(); object creation, not client host
 
181
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
182
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
183
                                     until this client is invalid
 
184
    interval:  datetime.timedelta(); How often to start a new checker
 
185
    stop_hook: If set, called by stop() as stop_hook(self)
 
186
    checker:   subprocess.Popen(); a running checker process used
 
187
                                   to see if the client lives.
 
188
                                   'None' if no process is running.
254
189
    checker_initiator_tag: a gobject event source tag, or None
255
 
    disable_initiator_tag: - '' -
 
190
    stop_initiator_tag:    - '' -
256
191
    checker_callback_tag:  - '' -
257
192
    checker_command: string; External command which is run to check if
258
193
                     client lives.  %() expansions are done at
259
194
                     runtime with vars(self) as dict, so that for
260
195
                     instance %(name)s can be used in the command.
261
 
    current_checker_command: string; current running checker_command
 
196
    Private attibutes:
 
197
    _timeout: Real variable for 'timeout'
 
198
    _interval: Real variable for 'interval'
 
199
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
200
    _interval_milliseconds: - '' -
262
201
    """
263
 
    
264
 
    @staticmethod
265
 
    def _timedelta_to_milliseconds(td):
266
 
        "Convert a datetime.timedelta() to milliseconds"
267
 
        return ((td.days * 24 * 60 * 60 * 1000)
268
 
                + (td.seconds * 1000)
269
 
                + (td.microseconds // 1000))
270
 
    
271
 
    def timeout_milliseconds(self):
272
 
        "Return the 'timeout' attribute in milliseconds"
273
 
        return self._timedelta_to_milliseconds(self.timeout)
274
 
    
275
 
    def interval_milliseconds(self):
276
 
        "Return the 'interval' attribute in milliseconds"
277
 
        return self._timedelta_to_milliseconds(self.interval)
278
 
    
279
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
202
    def _set_timeout(self, timeout):
 
203
        "Setter function for 'timeout' attribute"
 
204
        self._timeout = timeout
 
205
        self._timeout_milliseconds = ((self.timeout.days
 
206
                                       * 24 * 60 * 60 * 1000)
 
207
                                      + (self.timeout.seconds * 1000)
 
208
                                      + (self.timeout.microseconds
 
209
                                         // 1000))
 
210
    timeout = property(lambda self: self._timeout,
 
211
                       _set_timeout)
 
212
    del _set_timeout
 
213
    def _set_interval(self, interval):
 
214
        "Setter function for 'interval' attribute"
 
215
        self._interval = interval
 
216
        self._interval_milliseconds = ((self.interval.days
 
217
                                        * 24 * 60 * 60 * 1000)
 
218
                                       + (self.interval.seconds
 
219
                                          * 1000)
 
220
                                       + (self.interval.microseconds
 
221
                                          // 1000))
 
222
    interval = property(lambda self: self._interval,
 
223
                        _set_interval)
 
224
    del _set_interval
 
225
    def __init__(self, name = None, stop_hook=None, config={}):
280
226
        """Note: the 'checker' key in 'config' sets the
281
227
        'checker_command' attribute and *not* the 'checker'
282
228
        attribute."""
283
229
        self.name = name
284
 
        if config is None:
285
 
            config = {}
286
230
        logger.debug(u"Creating client %r", self.name)
287
231
        # Uppercase and remove spaces from fingerprint for later
288
232
        # comparison purposes with return value from the fingerprint()
289
233
        # function
290
 
        self.fingerprint = (config[u"fingerprint"].upper()
291
 
                            .replace(u" ", u""))
 
234
        self.fingerprint = config["fingerprint"].upper()\
 
235
                           .replace(u" ", u"")
292
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
293
 
        if u"secret" in config:
294
 
            self.secret = config[u"secret"].decode(u"base64")
295
 
        elif u"secfile" in config:
296
 
            with open(os.path.expanduser(os.path.expandvars
297
 
                                         (config[u"secfile"])),
298
 
                      "rb") as secfile:
299
 
                self.secret = secfile.read()
 
237
        if "secret" in config:
 
238
            self.secret = config["secret"].decode(u"base64")
 
239
        elif "secfile" in config:
 
240
            sf = open(config["secfile"])
 
241
            self.secret = sf.read()
 
242
            sf.close()
300
243
        else:
301
244
            raise TypeError(u"No secret or secfile for client %s"
302
245
                            % self.name)
303
 
        self.host = config.get(u"host", u"")
304
 
        self.created = datetime.datetime.utcnow()
305
 
        self.enabled = False
306
 
        self.last_enabled = None
 
246
        self.host = config.get("host", "")
 
247
        self.created = datetime.datetime.now()
307
248
        self.last_checked_ok = None
308
 
        self.timeout = string_to_delta(config[u"timeout"])
309
 
        self.interval = string_to_delta(config[u"interval"])
310
 
        self.disable_hook = disable_hook
 
249
        self.timeout = string_to_delta(config["timeout"])
 
250
        self.interval = string_to_delta(config["interval"])
 
251
        self.stop_hook = stop_hook
311
252
        self.checker = None
312
253
        self.checker_initiator_tag = None
313
 
        self.disable_initiator_tag = None
 
254
        self.stop_initiator_tag = None
314
255
        self.checker_callback_tag = None
315
 
        self.checker_command = config[u"checker"]
316
 
        self.current_checker_command = None
317
 
        self.last_connect = None
318
 
    
319
 
    def enable(self):
 
256
        self.check_command = config["checker"]
 
257
    def start(self):
320
258
        """Start this client's checker and timeout hooks"""
321
 
        if getattr(self, u"enabled", False):
322
 
            # Already enabled
323
 
            return
324
 
        self.last_enabled = datetime.datetime.utcnow()
325
259
        # Schedule a new checker to be started an 'interval' from now,
326
260
        # and every interval from then on.
327
 
        self.checker_initiator_tag = (gobject.timeout_add
328
 
                                      (self.interval_milliseconds(),
329
 
                                       self.start_checker))
330
 
        # Schedule a disable() when 'timeout' has passed
331
 
        self.disable_initiator_tag = (gobject.timeout_add
332
 
                                   (self.timeout_milliseconds(),
333
 
                                    self.disable))
334
 
        self.enabled = True
 
261
        self.checker_initiator_tag = gobject.timeout_add\
 
262
                                     (self._interval_milliseconds,
 
263
                                      self.start_checker)
335
264
        # Also start a new checker *right now*.
336
265
        self.start_checker()
337
 
    
338
 
    def disable(self, quiet=True):
339
 
        """Disable this client."""
340
 
        if not getattr(self, "enabled", False):
 
266
        # Schedule a stop() when 'timeout' has passed
 
267
        self.stop_initiator_tag = gobject.timeout_add\
 
268
                                  (self._timeout_milliseconds,
 
269
                                   self.stop)
 
270
    def stop(self):
 
271
        """Stop this client.
 
272
        The possibility that a client might be restarted is left open,
 
273
        but not currently used."""
 
274
        # If this client doesn't have a secret, it is already stopped.
 
275
        if hasattr(self, "secret") and self.secret:
 
276
            logger.info(u"Stopping client %s", self.name)
 
277
            self.secret = None
 
278
        else:
341
279
            return False
342
 
        if not quiet:
343
 
            logger.info(u"Disabling client %s", self.name)
344
 
        if getattr(self, u"disable_initiator_tag", False):
345
 
            gobject.source_remove(self.disable_initiator_tag)
346
 
            self.disable_initiator_tag = None
347
 
        if getattr(self, u"checker_initiator_tag", False):
 
280
        if getattr(self, "stop_initiator_tag", False):
 
281
            gobject.source_remove(self.stop_initiator_tag)
 
282
            self.stop_initiator_tag = None
 
283
        if getattr(self, "checker_initiator_tag", False):
348
284
            gobject.source_remove(self.checker_initiator_tag)
349
285
            self.checker_initiator_tag = None
350
286
        self.stop_checker()
351
 
        if self.disable_hook:
352
 
            self.disable_hook(self)
353
 
        self.enabled = False
 
287
        if self.stop_hook:
 
288
            self.stop_hook(self)
354
289
        # Do not run this again if called by a gobject.timeout_add
355
290
        return False
356
 
    
357
291
    def __del__(self):
358
 
        self.disable_hook = None
359
 
        self.disable()
360
 
    
361
 
    def checker_callback(self, pid, condition, command):
 
292
        self.stop_hook = None
 
293
        self.stop()
 
294
    def checker_callback(self, pid, condition):
362
295
        """The checker has completed, so take appropriate actions."""
 
296
        now = datetime.datetime.now()
363
297
        self.checker_callback_tag = None
364
298
        self.checker = None
365
 
        if os.WIFEXITED(condition):
366
 
            exitstatus = os.WEXITSTATUS(condition)
367
 
            if exitstatus == 0:
368
 
                logger.info(u"Checker for %(name)s succeeded",
369
 
                            vars(self))
370
 
                self.checked_ok()
371
 
            else:
372
 
                logger.info(u"Checker for %(name)s failed",
373
 
                            vars(self))
374
 
        else:
 
299
        if os.WIFEXITED(condition) \
 
300
               and (os.WEXITSTATUS(condition) == 0):
 
301
            logger.info(u"Checker for %(name)s succeeded",
 
302
                        vars(self))
 
303
            self.last_checked_ok = now
 
304
            gobject.source_remove(self.stop_initiator_tag)
 
305
            self.stop_initiator_tag = gobject.timeout_add\
 
306
                                      (self._timeout_milliseconds,
 
307
                                       self.stop)
 
308
        elif not os.WIFEXITED(condition):
375
309
            logger.warning(u"Checker for %(name)s crashed?",
376
310
                           vars(self))
377
 
    
378
 
    def checked_ok(self):
379
 
        """Bump up the timeout for this client.
380
 
        
381
 
        This should only be called when the client has been seen,
382
 
        alive and well.
383
 
        """
384
 
        self.last_checked_ok = datetime.datetime.utcnow()
385
 
        gobject.source_remove(self.disable_initiator_tag)
386
 
        self.disable_initiator_tag = (gobject.timeout_add
387
 
                                      (self.timeout_milliseconds(),
388
 
                                       self.disable))
389
 
    
 
311
        else:
 
312
            logger.info(u"Checker for %(name)s failed",
 
313
                        vars(self))
390
314
    def start_checker(self):
391
315
        """Start a new checker subprocess if one is not running.
392
 
        
393
316
        If a checker already exists, leave it running and do
394
317
        nothing."""
395
318
        # The reason for not killing a running checker is that if we
398
321
        # client would inevitably timeout, since no checker would get
399
322
        # a chance to run to completion.  If we instead leave running
400
323
        # checkers alone, the checker would have to take more time
401
 
        # than 'timeout' for the client to be disabled, which is as it
402
 
        # should be.
403
 
        
404
 
        # If a checker exists, make sure it is not a zombie
405
 
        try:
406
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
 
        except (AttributeError, OSError), error:
408
 
            if (isinstance(error, OSError)
409
 
                and error.errno != errno.ECHILD):
410
 
                raise error
411
 
        else:
412
 
            if pid:
413
 
                logger.warning(u"Checker was a zombie")
414
 
                gobject.source_remove(self.checker_callback_tag)
415
 
                self.checker_callback(pid, status,
416
 
                                      self.current_checker_command)
417
 
        # Start a new checker if needed
 
324
        # than 'timeout' for the client to be declared invalid, which
 
325
        # is as it should be.
418
326
        if self.checker is None:
419
327
            try:
420
 
                # In case checker_command has exactly one % operator
421
 
                command = self.checker_command % self.host
 
328
                # In case check_command has exactly one % operator
 
329
                command = self.check_command % self.host
422
330
            except TypeError:
423
331
                # Escape attributes for the shell
424
 
                escaped_attrs = dict((key,
425
 
                                      re.escape(unicode(str(val),
426
 
                                                        errors=
427
 
                                                        u'replace')))
 
332
                escaped_attrs = dict((key, re.escape(str(val)))
428
333
                                     for key, val in
429
334
                                     vars(self).iteritems())
430
335
                try:
431
 
                    command = self.checker_command % escaped_attrs
 
336
                    command = self.check_command % escaped_attrs
432
337
                except TypeError, error:
433
338
                    logger.error(u'Could not format string "%s":'
434
 
                                 u' %s', self.checker_command, error)
 
339
                                 u' %s', self.check_command, error)
435
340
                    return True # Try again later
436
 
            self.current_checker_command = command
437
341
            try:
438
342
                logger.info(u"Starting checker %r for %s",
439
343
                            command, self.name)
443
347
                # always replaced by /dev/null.)
444
348
                self.checker = subprocess.Popen(command,
445
349
                                                close_fds=True,
446
 
                                                shell=True, cwd=u"/")
447
 
                self.checker_callback_tag = (gobject.child_watch_add
448
 
                                             (self.checker.pid,
449
 
                                              self.checker_callback,
450
 
                                              data=command))
451
 
                # The checker may have completed before the gobject
452
 
                # watch was added.  Check for this.
453
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
454
 
                if pid:
455
 
                    gobject.source_remove(self.checker_callback_tag)
456
 
                    self.checker_callback(pid, status, command)
 
350
                                                shell=True, cwd="/")
 
351
                self.checker_callback_tag = gobject.child_watch_add\
 
352
                                            (self.checker.pid,
 
353
                                             self.checker_callback)
457
354
            except OSError, error:
458
355
                logger.error(u"Failed to start subprocess: %s",
459
356
                             error)
460
357
        # Re-run this periodically if run by gobject.timeout_add
461
358
        return True
462
 
    
463
359
    def stop_checker(self):
464
360
        """Force the checker process, if any, to stop."""
465
361
        if self.checker_callback_tag:
466
362
            gobject.source_remove(self.checker_callback_tag)
467
363
            self.checker_callback_tag = None
468
 
        if getattr(self, u"checker", None) is None:
 
364
        if getattr(self, "checker", None) is None:
469
365
            return
470
366
        logger.debug(u"Stopping checker for %(name)s", vars(self))
471
367
        try:
472
368
            os.kill(self.checker.pid, signal.SIGTERM)
473
 
            #time.sleep(0.5)
 
369
            #os.sleep(0.5)
474
370
            #if self.checker.poll() is None:
475
371
            #    os.kill(self.checker.pid, signal.SIGKILL)
476
372
        except OSError, error:
477
373
            if error.errno != errno.ESRCH: # No such process
478
374
                raise
479
375
        self.checker = None
480
 
 
481
 
 
482
 
def dbus_service_property(dbus_interface, signature=u"v",
483
 
                          access=u"readwrite", byte_arrays=False):
484
 
    """Decorators for marking methods of a DBusObjectWithProperties to
485
 
    become properties on the D-Bus.
486
 
    
487
 
    The decorated method will be called with no arguments by "Get"
488
 
    and with one argument by "Set".
489
 
    
490
 
    The parameters, where they are supported, are the same as
491
 
    dbus.service.method, except there is only "signature", since the
492
 
    type from Get() and the type sent to Set() is the same.
493
 
    """
494
 
    # Encoding deeply encoded byte arrays is not supported yet by the
495
 
    # "Set" method, so we fail early here:
496
 
    if byte_arrays and signature != u"ay":
497
 
        raise ValueError(u"Byte arrays not supported for non-'ay'"
498
 
                         u" signature %r" % signature)
499
 
    def decorator(func):
500
 
        func._dbus_is_property = True
501
 
        func._dbus_interface = dbus_interface
502
 
        func._dbus_signature = signature
503
 
        func._dbus_access = access
504
 
        func._dbus_name = func.__name__
505
 
        if func._dbus_name.endswith(u"_dbus_property"):
506
 
            func._dbus_name = func._dbus_name[:-14]
507
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
508
 
        return func
509
 
    return decorator
510
 
 
511
 
 
512
 
class DBusPropertyException(dbus.exceptions.DBusException):
513
 
    """A base class for D-Bus property-related exceptions
514
 
    """
515
 
    def __unicode__(self):
516
 
        return unicode(str(self))
517
 
 
518
 
 
519
 
class DBusPropertyAccessException(DBusPropertyException):
520
 
    """A property's access permissions disallows an operation.
521
 
    """
522
 
    pass
523
 
 
524
 
 
525
 
class DBusPropertyNotFound(DBusPropertyException):
526
 
    """An attempt was made to access a non-existing property.
527
 
    """
528
 
    pass
529
 
 
530
 
 
531
 
class DBusObjectWithProperties(dbus.service.Object):
532
 
    """A D-Bus object with properties.
533
 
 
534
 
    Classes inheriting from this can use the dbus_service_property
535
 
    decorator to expose methods as D-Bus properties.  It exposes the
536
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
537
 
    """
538
 
    
539
 
    @staticmethod
540
 
    def _is_dbus_property(obj):
541
 
        return getattr(obj, u"_dbus_is_property", False)
542
 
    
543
 
    def _get_all_dbus_properties(self):
544
 
        """Returns a generator of (name, attribute) pairs
545
 
        """
546
 
        return ((prop._dbus_name, prop)
547
 
                for name, prop in
548
 
                inspect.getmembers(self, self._is_dbus_property))
549
 
    
550
 
    def _get_dbus_property(self, interface_name, property_name):
551
 
        """Returns a bound method if one exists which is a D-Bus
552
 
        property with the specified name and interface.
553
 
        """
554
 
        for name in (property_name,
555
 
                     property_name + u"_dbus_property"):
556
 
            prop = getattr(self, name, None)
557
 
            if (prop is None
558
 
                or not self._is_dbus_property(prop)
559
 
                or prop._dbus_name != property_name
560
 
                or (interface_name and prop._dbus_interface
561
 
                    and interface_name != prop._dbus_interface)):
562
 
                continue
563
 
            return prop
564
 
        # No such property
565
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
566
 
                                   + interface_name + u"."
567
 
                                   + property_name)
568
 
    
569
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
570
 
                         out_signature=u"v")
571
 
    def Get(self, interface_name, property_name):
572
 
        """Standard D-Bus property Get() method, see D-Bus standard.
573
 
        """
574
 
        prop = self._get_dbus_property(interface_name, property_name)
575
 
        if prop._dbus_access == u"write":
576
 
            raise DBusPropertyAccessException(property_name)
577
 
        value = prop()
578
 
        if not hasattr(value, u"variant_level"):
579
 
            return value
580
 
        return type(value)(value, variant_level=value.variant_level+1)
581
 
    
582
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
583
 
    def Set(self, interface_name, property_name, value):
584
 
        """Standard D-Bus property Set() method, see D-Bus standard.
585
 
        """
586
 
        prop = self._get_dbus_property(interface_name, property_name)
587
 
        if prop._dbus_access == u"read":
588
 
            raise DBusPropertyAccessException(property_name)
589
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
590
 
            # The byte_arrays option is not supported yet on
591
 
            # signatures other than "ay".
592
 
            if prop._dbus_signature != u"ay":
593
 
                raise ValueError
594
 
            value = dbus.ByteArray(''.join(unichr(byte)
595
 
                                           for byte in value))
596
 
        prop(value)
597
 
    
598
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
599
 
                         out_signature=u"a{sv}")
600
 
    def GetAll(self, interface_name):
601
 
        """Standard D-Bus property GetAll() method, see D-Bus
602
 
        standard.
603
 
 
604
 
        Note: Will not include properties with access="write".
605
 
        """
606
 
        all = {}
607
 
        for name, prop in self._get_all_dbus_properties():
608
 
            if (interface_name
609
 
                and interface_name != prop._dbus_interface):
610
 
                # Interface non-empty but did not match
611
 
                continue
612
 
            # Ignore write-only properties
613
 
            if prop._dbus_access == u"write":
614
 
                continue
615
 
            value = prop()
616
 
            if not hasattr(value, u"variant_level"):
617
 
                all[name] = value
618
 
                continue
619
 
            all[name] = type(value)(value, variant_level=
620
 
                                    value.variant_level+1)
621
 
        return dbus.Dictionary(all, signature=u"sv")
622
 
    
623
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
624
 
                         out_signature=u"s",
625
 
                         path_keyword='object_path',
626
 
                         connection_keyword='connection')
627
 
    def Introspect(self, object_path, connection):
628
 
        """Standard D-Bus method, overloaded to insert property tags.
629
 
        """
630
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
631
 
                                                   connection)
632
 
        try:
633
 
            document = xml.dom.minidom.parseString(xmlstring)
634
 
            def make_tag(document, name, prop):
635
 
                e = document.createElement(u"property")
636
 
                e.setAttribute(u"name", name)
637
 
                e.setAttribute(u"type", prop._dbus_signature)
638
 
                e.setAttribute(u"access", prop._dbus_access)
639
 
                return e
640
 
            for if_tag in document.getElementsByTagName(u"interface"):
641
 
                for tag in (make_tag(document, name, prop)
642
 
                            for name, prop
643
 
                            in self._get_all_dbus_properties()
644
 
                            if prop._dbus_interface
645
 
                            == if_tag.getAttribute(u"name")):
646
 
                    if_tag.appendChild(tag)
647
 
                # Add the names to the return values for the
648
 
                # "org.freedesktop.DBus.Properties" methods
649
 
                if (if_tag.getAttribute(u"name")
650
 
                    == u"org.freedesktop.DBus.Properties"):
651
 
                    for cn in if_tag.getElementsByTagName(u"method"):
652
 
                        if cn.getAttribute(u"name") == u"Get":
653
 
                            for arg in cn.getElementsByTagName(u"arg"):
654
 
                                if (arg.getAttribute(u"direction")
655
 
                                    == u"out"):
656
 
                                    arg.setAttribute(u"name", u"value")
657
 
                        elif cn.getAttribute(u"name") == u"GetAll":
658
 
                            for arg in cn.getElementsByTagName(u"arg"):
659
 
                                if (arg.getAttribute(u"direction")
660
 
                                    == u"out"):
661
 
                                    arg.setAttribute(u"name", u"props")
662
 
            xmlstring = document.toxml(u"utf-8")
663
 
            document.unlink()
664
 
        except (AttributeError, xml.dom.DOMException,
665
 
                xml.parsers.expat.ExpatError), error:
666
 
            logger.error(u"Failed to override Introspection method",
667
 
                         error)
668
 
        return xmlstring
669
 
 
670
 
 
671
 
class ClientDBus(Client, DBusObjectWithProperties):
672
 
    """A Client class using D-Bus
673
 
    
674
 
    Attributes:
675
 
    dbus_object_path: dbus.ObjectPath
676
 
    bus: dbus.SystemBus()
677
 
    """
678
 
    # dbus.service.Object doesn't use super(), so we can't either.
679
 
    
680
 
    def __init__(self, bus = None, *args, **kwargs):
681
 
        self.bus = bus
682
 
        Client.__init__(self, *args, **kwargs)
683
 
        # Only now, when this client is initialized, can it show up on
684
 
        # the D-Bus
685
 
        self.dbus_object_path = (dbus.ObjectPath
686
 
                                 (u"/clients/"
687
 
                                  + self.name.replace(u".", u"_")))
688
 
        DBusObjectWithProperties.__init__(self, self.bus,
689
 
                                          self.dbus_object_path)
690
 
    
691
 
    @staticmethod
692
 
    def _datetime_to_dbus(dt, variant_level=0):
693
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
694
 
        return dbus.String(dt.isoformat(),
695
 
                           variant_level=variant_level)
696
 
    
697
 
    def enable(self):
698
 
        oldstate = getattr(self, u"enabled", False)
699
 
        r = Client.enable(self)
700
 
        if oldstate != self.enabled:
701
 
            # Emit D-Bus signals
702
 
            self.PropertyChanged(dbus.String(u"enabled"),
703
 
                                 dbus.Boolean(True, variant_level=1))
704
 
            self.PropertyChanged(
705
 
                dbus.String(u"last_enabled"),
706
 
                self._datetime_to_dbus(self.last_enabled,
707
 
                                       variant_level=1))
708
 
        return r
709
 
    
710
 
    def disable(self, quiet = False):
711
 
        oldstate = getattr(self, u"enabled", False)
712
 
        r = Client.disable(self, quiet=quiet)
713
 
        if not quiet and oldstate != self.enabled:
714
 
            # Emit D-Bus signal
715
 
            self.PropertyChanged(dbus.String(u"enabled"),
716
 
                                 dbus.Boolean(False, variant_level=1))
717
 
        return r
718
 
    
719
 
    def __del__(self, *args, **kwargs):
720
 
        try:
721
 
            self.remove_from_connection()
722
 
        except LookupError:
723
 
            pass
724
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
725
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
726
 
        Client.__del__(self, *args, **kwargs)
727
 
    
728
 
    def checker_callback(self, pid, condition, command,
729
 
                         *args, **kwargs):
730
 
        self.checker_callback_tag = None
731
 
        self.checker = None
732
 
        # Emit D-Bus signal
733
 
        self.PropertyChanged(dbus.String(u"checker_running"),
734
 
                             dbus.Boolean(False, variant_level=1))
735
 
        if os.WIFEXITED(condition):
736
 
            exitstatus = os.WEXITSTATUS(condition)
737
 
            # Emit D-Bus signal
738
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
739
 
                                  dbus.Int64(condition),
740
 
                                  dbus.String(command))
741
 
        else:
742
 
            # Emit D-Bus signal
743
 
            self.CheckerCompleted(dbus.Int16(-1),
744
 
                                  dbus.Int64(condition),
745
 
                                  dbus.String(command))
746
 
        
747
 
        return Client.checker_callback(self, pid, condition, command,
748
 
                                       *args, **kwargs)
749
 
    
750
 
    def checked_ok(self, *args, **kwargs):
751
 
        r = Client.checked_ok(self, *args, **kwargs)
752
 
        # Emit D-Bus signal
753
 
        self.PropertyChanged(
754
 
            dbus.String(u"last_checked_ok"),
755
 
            (self._datetime_to_dbus(self.last_checked_ok,
756
 
                                    variant_level=1)))
757
 
        return r
758
 
    
759
 
    def start_checker(self, *args, **kwargs):
760
 
        old_checker = self.checker
761
 
        if self.checker is not None:
762
 
            old_checker_pid = self.checker.pid
763
 
        else:
764
 
            old_checker_pid = None
765
 
        r = Client.start_checker(self, *args, **kwargs)
766
 
        # Only if new checker process was started
767
 
        if (self.checker is not None
768
 
            and old_checker_pid != self.checker.pid):
769
 
            # Emit D-Bus signal
770
 
            self.CheckerStarted(self.current_checker_command)
771
 
            self.PropertyChanged(
772
 
                dbus.String(u"checker_running"),
773
 
                dbus.Boolean(True, variant_level=1))
774
 
        return r
775
 
    
776
 
    def stop_checker(self, *args, **kwargs):
777
 
        old_checker = getattr(self, u"checker", None)
778
 
        r = Client.stop_checker(self, *args, **kwargs)
779
 
        if (old_checker is not None
780
 
            and getattr(self, u"checker", None) is None):
781
 
            self.PropertyChanged(dbus.String(u"checker_running"),
782
 
                                 dbus.Boolean(False, variant_level=1))
783
 
        return r
784
 
    
785
 
    ## D-Bus methods, signals & properties
786
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
787
 
    
788
 
    ## Signals
789
 
    
790
 
    # CheckerCompleted - signal
791
 
    @dbus.service.signal(_interface, signature=u"nxs")
792
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
793
 
        "D-Bus signal"
794
 
        pass
795
 
    
796
 
    # CheckerStarted - signal
797
 
    @dbus.service.signal(_interface, signature=u"s")
798
 
    def CheckerStarted(self, command):
799
 
        "D-Bus signal"
800
 
        pass
801
 
    
802
 
    # PropertyChanged - signal
803
 
    @dbus.service.signal(_interface, signature=u"sv")
804
 
    def PropertyChanged(self, property, value):
805
 
        "D-Bus signal"
806
 
        pass
807
 
    
808
 
    # GotSecret - signal
809
 
    @dbus.service.signal(_interface)
810
 
    def GotSecret(self):
811
 
        "D-Bus signal"
812
 
        pass
813
 
    
814
 
    # Rejected - signal
815
 
    @dbus.service.signal(_interface)
816
 
    def Rejected(self):
817
 
        "D-Bus signal"
818
 
        pass
819
 
    
820
 
    ## Methods
821
 
    
822
 
    # CheckedOK - method
823
 
    @dbus.service.method(_interface)
824
 
    def CheckedOK(self):
825
 
        return self.checked_ok()
826
 
    
827
 
    # Enable - method
828
 
    @dbus.service.method(_interface)
829
 
    def Enable(self):
830
 
        "D-Bus method"
831
 
        self.enable()
832
 
    
833
 
    # StartChecker - method
834
 
    @dbus.service.method(_interface)
835
 
    def StartChecker(self):
836
 
        "D-Bus method"
837
 
        self.start_checker()
838
 
    
839
 
    # Disable - method
840
 
    @dbus.service.method(_interface)
841
 
    def Disable(self):
842
 
        "D-Bus method"
843
 
        self.disable()
844
 
    
845
 
    # StopChecker - method
846
 
    @dbus.service.method(_interface)
847
 
    def StopChecker(self):
848
 
        self.stop_checker()
849
 
    
850
 
    ## Properties
851
 
    
852
 
    # name - property
853
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
854
 
    def name_dbus_property(self):
855
 
        return dbus.String(self.name)
856
 
    
857
 
    # fingerprint - property
858
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
859
 
    def fingerprint_dbus_property(self):
860
 
        return dbus.String(self.fingerprint)
861
 
    
862
 
    # host - property
863
 
    @dbus_service_property(_interface, signature=u"s",
864
 
                           access=u"readwrite")
865
 
    def host_dbus_property(self, value=None):
866
 
        if value is None:       # get
867
 
            return dbus.String(self.host)
868
 
        self.host = value
869
 
        # Emit D-Bus signal
870
 
        self.PropertyChanged(dbus.String(u"host"),
871
 
                             dbus.String(value, variant_level=1))
872
 
    
873
 
    # created - property
874
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
875
 
    def created_dbus_property(self):
876
 
        return dbus.String(self._datetime_to_dbus(self.created))
877
 
    
878
 
    # last_enabled - property
879
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
880
 
    def last_enabled_dbus_property(self):
881
 
        if self.last_enabled is None:
882
 
            return dbus.String(u"")
883
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
 
    
885
 
    # enabled - property
886
 
    @dbus_service_property(_interface, signature=u"b",
887
 
                           access=u"readwrite")
888
 
    def enabled_dbus_property(self, value=None):
889
 
        if value is None:       # get
890
 
            return dbus.Boolean(self.enabled)
891
 
        if value:
892
 
            self.enable()
893
 
        else:
894
 
            self.disable()
895
 
    
896
 
    # last_checked_ok - property
897
 
    @dbus_service_property(_interface, signature=u"s",
898
 
                           access=u"readwrite")
899
 
    def last_checked_ok_dbus_property(self, value=None):
900
 
        if value is not None:
901
 
            self.checked_ok()
902
 
            return
 
376
    def still_valid(self):
 
377
        """Has the timeout not yet passed for this client?"""
 
378
        now = datetime.datetime.now()
903
379
        if self.last_checked_ok is None:
904
 
            return dbus.String(u"")
905
 
        return dbus.String(self._datetime_to_dbus(self
906
 
                                                  .last_checked_ok))
907
 
    
908
 
    # timeout - property
909
 
    @dbus_service_property(_interface, signature=u"t",
910
 
                           access=u"readwrite")
911
 
    def timeout_dbus_property(self, value=None):
912
 
        if value is None:       # get
913
 
            return dbus.UInt64(self.timeout_milliseconds())
914
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
915
 
        # Emit D-Bus signal
916
 
        self.PropertyChanged(dbus.String(u"timeout"),
917
 
                             dbus.UInt64(value, variant_level=1))
918
 
        if getattr(self, u"disable_initiator_tag", None) is None:
919
 
            return
920
 
        # Reschedule timeout
921
 
        gobject.source_remove(self.disable_initiator_tag)
922
 
        self.disable_initiator_tag = None
923
 
        time_to_die = (self.
924
 
                       _timedelta_to_milliseconds((self
925
 
                                                   .last_checked_ok
926
 
                                                   + self.timeout)
927
 
                                                  - datetime.datetime
928
 
                                                  .utcnow()))
929
 
        if time_to_die <= 0:
930
 
            # The timeout has passed
931
 
            self.disable()
932
 
        else:
933
 
            self.disable_initiator_tag = (gobject.timeout_add
934
 
                                          (time_to_die, self.disable))
935
 
    
936
 
    # interval - property
937
 
    @dbus_service_property(_interface, signature=u"t",
938
 
                           access=u"readwrite")
939
 
    def interval_dbus_property(self, value=None):
940
 
        if value is None:       # get
941
 
            return dbus.UInt64(self.interval_milliseconds())
942
 
        self.interval = datetime.timedelta(0, 0, 0, value)
943
 
        # Emit D-Bus signal
944
 
        self.PropertyChanged(dbus.String(u"interval"),
945
 
                             dbus.UInt64(value, variant_level=1))
946
 
        if getattr(self, u"checker_initiator_tag", None) is None:
947
 
            return
948
 
        # Reschedule checker run
949
 
        gobject.source_remove(self.checker_initiator_tag)
950
 
        self.checker_initiator_tag = (gobject.timeout_add
951
 
                                      (value, self.start_checker))
952
 
        self.start_checker()    # Start one now, too
953
 
 
954
 
    # checker - property
955
 
    @dbus_service_property(_interface, signature=u"s",
956
 
                           access=u"readwrite")
957
 
    def checker_dbus_property(self, value=None):
958
 
        if value is None:       # get
959
 
            return dbus.String(self.checker_command)
960
 
        self.checker_command = value
961
 
        # Emit D-Bus signal
962
 
        self.PropertyChanged(dbus.String(u"checker"),
963
 
                             dbus.String(self.checker_command,
964
 
                                         variant_level=1))
965
 
    
966
 
    # checker_running - property
967
 
    @dbus_service_property(_interface, signature=u"b",
968
 
                           access=u"readwrite")
969
 
    def checker_running_dbus_property(self, value=None):
970
 
        if value is None:       # get
971
 
            return dbus.Boolean(self.checker is not None)
972
 
        if value:
973
 
            self.start_checker()
974
 
        else:
975
 
            self.stop_checker()
976
 
    
977
 
    # object_path - property
978
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
979
 
    def object_path_dbus_property(self):
980
 
        return self.dbus_object_path # is already a dbus.ObjectPath
981
 
    
982
 
    # secret = property
983
 
    @dbus_service_property(_interface, signature=u"ay",
984
 
                           access=u"write", byte_arrays=True)
985
 
    def secret_dbus_property(self, value):
986
 
        self.secret = str(value)
987
 
    
988
 
    del _interface
989
 
 
990
 
 
991
 
class ClientHandler(socketserver.BaseRequestHandler, object):
992
 
    """A class to handle client connections.
993
 
    
994
 
    Instantiated once for each connection to handle it.
 
380
            return now < (self.created + self.timeout)
 
381
        else:
 
382
            return now < (self.last_checked_ok + self.timeout)
 
383
 
 
384
 
 
385
def peer_certificate(session):
 
386
    "Return the peer's OpenPGP certificate as a bytestring"
 
387
    # If not an OpenPGP certificate...
 
388
    if gnutls.library.functions.gnutls_certificate_type_get\
 
389
            (session._c_object) \
 
390
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
391
        # ...do the normal thing
 
392
        return session.peer_certificate
 
393
    list_size = ctypes.c_uint()
 
394
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
395
        (session._c_object, ctypes.byref(list_size))
 
396
    if list_size.value == 0:
 
397
        return None
 
398
    cert = cert_list[0]
 
399
    return ctypes.string_at(cert.data, cert.size)
 
400
 
 
401
 
 
402
def fingerprint(openpgp):
 
403
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
404
    # New GnuTLS "datum" with the OpenPGP public key
 
405
    datum = gnutls.library.types.gnutls_datum_t\
 
406
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
407
                     ctypes.POINTER(ctypes.c_ubyte)),
 
408
         ctypes.c_uint(len(openpgp)))
 
409
    # New empty GnuTLS certificate
 
410
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
411
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
412
        (ctypes.byref(crt))
 
413
    # Import the OpenPGP public key into the certificate
 
414
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
415
                    (crt, ctypes.byref(datum),
 
416
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
417
    # Verify the self signature in the key
 
418
    crtverify = ctypes.c_uint();
 
419
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
420
        (crt, 0, ctypes.byref(crtverify))
 
421
    if crtverify.value != 0:
 
422
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
423
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
424
    # New buffer for the fingerprint
 
425
    buffer = ctypes.create_string_buffer(20)
 
426
    buffer_length = ctypes.c_size_t()
 
427
    # Get the fingerprint from the certificate into the buffer
 
428
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
429
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
430
    # Deinit the certificate
 
431
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
432
    # Convert the buffer to a Python bytestring
 
433
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
434
    # Convert the bytestring to hexadecimal notation
 
435
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
436
    return hex_fpr
 
437
 
 
438
 
 
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
440
    """A TCP request handler class.
 
441
    Instantiated by IPv6_TCPServer for each request to handle it.
995
442
    Note: This will run in its own forked process."""
996
443
    
997
444
    def handle(self):
998
445
        logger.info(u"TCP connection from: %s",
999
 
                    unicode(self.client_address))
1000
 
        logger.debug(u"IPC Pipe FD: %d",
1001
 
                     self.server.child_pipe[1].fileno())
1002
 
        # Open IPC pipe to parent process
1003
 
        with contextlib.nested(self.server.child_pipe[1],
1004
 
                               self.server.parent_pipe[0]
1005
 
                               ) as (ipc, ipc_return):
1006
 
            session = (gnutls.connection
1007
 
                       .ClientSession(self.request,
1008
 
                                      gnutls.connection
1009
 
                                      .X509Credentials()))
1010
 
            
1011
 
            # Note: gnutls.connection.X509Credentials is really a
1012
 
            # generic GnuTLS certificate credentials object so long as
1013
 
            # no X.509 keys are added to it.  Therefore, we can use it
1014
 
            # here despite using OpenPGP certificates.
1015
 
            
1016
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1017
 
            #                      u"+AES-256-CBC", u"+SHA1",
1018
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
1019
 
            #                      u"+DHE-DSS"))
1020
 
            # Use a fallback default, since this MUST be set.
1021
 
            priority = self.server.gnutls_priority
1022
 
            if priority is None:
1023
 
                priority = u"NORMAL"
1024
 
            (gnutls.library.functions
1025
 
             .gnutls_priority_set_direct(session._c_object,
1026
 
                                         priority, None))
1027
 
            
1028
 
            # Start communication using the Mandos protocol
1029
 
            # Get protocol number
1030
 
            line = self.request.makefile().readline()
1031
 
            logger.debug(u"Protocol version: %r", line)
1032
 
            try:
1033
 
                if int(line.strip().split()[0]) > 1:
1034
 
                    raise RuntimeError
1035
 
            except (ValueError, IndexError, RuntimeError), error:
1036
 
                logger.error(u"Unknown protocol version: %s", error)
1037
 
                return
1038
 
            
1039
 
            # Start GnuTLS connection
1040
 
            try:
1041
 
                session.handshake()
1042
 
            except gnutls.errors.GNUTLSError, error:
1043
 
                logger.warning(u"Handshake failed: %s", error)
1044
 
                # Do not run session.bye() here: the session is not
1045
 
                # established.  Just abandon the request.
1046
 
                return
1047
 
            logger.debug(u"Handshake succeeded")
1048
 
            try:
1049
 
                try:
1050
 
                    fpr = self.fingerprint(self.peer_certificate
1051
 
                                           (session))
1052
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1053
 
                    logger.warning(u"Bad certificate: %s", error)
1054
 
                    return
1055
 
                logger.debug(u"Fingerprint: %s", fpr)
1056
 
 
1057
 
                for c in self.server.clients:
1058
 
                    if c.fingerprint == fpr:
1059
 
                        client = c
1060
 
                        break
1061
 
                else:
1062
 
                    ipc.write(u"NOTFOUND %s %s\n"
1063
 
                              % (fpr, unicode(self.client_address)))
1064
 
                    return
1065
 
                
1066
 
                class ClientProxy(object):
1067
 
                    """Client proxy object.  Not for calling methods."""
1068
 
                    def __init__(self, client):
1069
 
                        self.client = client
1070
 
                    def __getattr__(self, name):
1071
 
                        if name.startswith("ipc_"):
1072
 
                            def tempfunc():
1073
 
                                ipc.write("%s %s\n" % (name[4:].upper(),
1074
 
                                                       self.client.name))
1075
 
                            return tempfunc
1076
 
                        if not hasattr(self.client, name):
1077
 
                            raise AttributeError
1078
 
                        ipc.write(u"GETATTR %s %s\n"
1079
 
                                  % (name, self.client.fingerprint))
1080
 
                        return pickle.load(ipc_return)
1081
 
                clientproxy = ClientProxy(client)
1082
 
                # Have to check if client.enabled, since it is
1083
 
                # possible that the client was disabled since the
1084
 
                # GnuTLS session was established.
1085
 
                if not clientproxy.enabled:
1086
 
                    clientproxy.ipc_disabled()
1087
 
                    return
1088
 
                
1089
 
                clientproxy.ipc_sending()
1090
 
                sent_size = 0
1091
 
                while sent_size < len(client.secret):
1092
 
                    sent = session.send(client.secret[sent_size:])
1093
 
                    logger.debug(u"Sent: %d, remaining: %d",
1094
 
                                 sent, len(client.secret)
1095
 
                                 - (sent_size + sent))
1096
 
                    sent_size += sent
1097
 
            finally:
1098
 
                session.bye()
1099
 
    
1100
 
    @staticmethod
1101
 
    def peer_certificate(session):
1102
 
        "Return the peer's OpenPGP certificate as a bytestring"
1103
 
        # If not an OpenPGP certificate...
1104
 
        if (gnutls.library.functions
1105
 
            .gnutls_certificate_type_get(session._c_object)
1106
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1107
 
            # ...do the normal thing
1108
 
            return session.peer_certificate
1109
 
        list_size = ctypes.c_uint(1)
1110
 
        cert_list = (gnutls.library.functions
1111
 
                     .gnutls_certificate_get_peers
1112
 
                     (session._c_object, ctypes.byref(list_size)))
1113
 
        if not bool(cert_list) and list_size.value != 0:
1114
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1115
 
                                            u" certificate")
1116
 
        if list_size.value == 0:
1117
 
            return None
1118
 
        cert = cert_list[0]
1119
 
        return ctypes.string_at(cert.data, cert.size)
1120
 
    
1121
 
    @staticmethod
1122
 
    def fingerprint(openpgp):
1123
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1124
 
        # New GnuTLS "datum" with the OpenPGP public key
1125
 
        datum = (gnutls.library.types
1126
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1127
 
                                             ctypes.POINTER
1128
 
                                             (ctypes.c_ubyte)),
1129
 
                                 ctypes.c_uint(len(openpgp))))
1130
 
        # New empty GnuTLS certificate
1131
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1132
 
        (gnutls.library.functions
1133
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1134
 
        # Import the OpenPGP public key into the certificate
1135
 
        (gnutls.library.functions
1136
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1137
 
                                    gnutls.library.constants
1138
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1139
 
        # Verify the self signature in the key
1140
 
        crtverify = ctypes.c_uint()
1141
 
        (gnutls.library.functions
1142
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1143
 
                                         ctypes.byref(crtverify)))
1144
 
        if crtverify.value != 0:
1145
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1146
 
            raise (gnutls.errors.CertificateSecurityError
1147
 
                   (u"Verify failed"))
1148
 
        # New buffer for the fingerprint
1149
 
        buf = ctypes.create_string_buffer(20)
1150
 
        buf_len = ctypes.c_size_t()
1151
 
        # Get the fingerprint from the certificate into the buffer
1152
 
        (gnutls.library.functions
1153
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1154
 
                                             ctypes.byref(buf_len)))
1155
 
        # Deinit the certificate
1156
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1157
 
        # Convert the buffer to a Python bytestring
1158
 
        fpr = ctypes.string_at(buf, buf_len.value)
1159
 
        # Convert the bytestring to hexadecimal notation
1160
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1161
 
        return hex_fpr
1162
 
 
1163
 
 
1164
 
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1165
 
    """Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1166
 
    def process_request(self, request, client_address):
1167
 
        """Overrides and wraps the original process_request().
1168
 
        
1169
 
        This function creates a new pipe in self.pipe
1170
 
        """
1171
 
        # Child writes to child_pipe
1172
 
        self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1173
 
        # Parent writes to parent_pipe
1174
 
        self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1175
 
        super(ForkingMixInWithPipes,
1176
 
              self).process_request(request, client_address)
1177
 
        # Close unused ends for parent
1178
 
        self.parent_pipe[0].close() # close read end
1179
 
        self.child_pipe[1].close()  # close write end
1180
 
        self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1181
 
    def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1182
 
        """Dummy function; override as necessary"""
1183
 
        child_pipe_fd.close()
1184
 
        parent_pipe_fd.close()
1185
 
 
1186
 
 
1187
 
class IPv6_TCPServer(ForkingMixInWithPipes,
1188
 
                     socketserver.TCPServer, object):
1189
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1190
 
    
 
446
                     unicode(self.client_address))
 
447
        session = gnutls.connection.ClientSession\
 
448
                  (self.request, gnutls.connection.X509Credentials())
 
449
        
 
450
        line = self.request.makefile().readline()
 
451
        logger.debug(u"Protocol version: %r", line)
 
452
        try:
 
453
            if int(line.strip().split()[0]) > 1:
 
454
                raise RuntimeError
 
455
        except (ValueError, IndexError, RuntimeError), error:
 
456
            logger.error(u"Unknown protocol version: %s", error)
 
457
            return
 
458
        
 
459
        # Note: gnutls.connection.X509Credentials is really a generic
 
460
        # GnuTLS certificate credentials object so long as no X.509
 
461
        # keys are added to it.  Therefore, we can use it here despite
 
462
        # using OpenPGP certificates.
 
463
        
 
464
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
465
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
466
        #                "+DHE-DSS"))
 
467
        priority = "NORMAL"             # Fallback default, since this
 
468
                                        # MUST be set.
 
469
        if self.server.settings["priority"]:
 
470
            priority = self.server.settings["priority"]
 
471
        gnutls.library.functions.gnutls_priority_set_direct\
 
472
            (session._c_object, priority, None);
 
473
        
 
474
        try:
 
475
            session.handshake()
 
476
        except gnutls.errors.GNUTLSError, error:
 
477
            logger.warning(u"Handshake failed: %s", error)
 
478
            # Do not run session.bye() here: the session is not
 
479
            # established.  Just abandon the request.
 
480
            return
 
481
        try:
 
482
            fpr = fingerprint(peer_certificate(session))
 
483
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
484
            logger.warning(u"Bad certificate: %s", error)
 
485
            session.bye()
 
486
            return
 
487
        logger.debug(u"Fingerprint: %s", fpr)
 
488
        client = None
 
489
        for c in self.server.clients:
 
490
            if c.fingerprint == fpr:
 
491
                client = c
 
492
                break
 
493
        if not client:
 
494
            logger.warning(u"Client not found for fingerprint: %s",
 
495
                           fpr)
 
496
            session.bye()
 
497
            return
 
498
        # Have to check if client.still_valid(), since it is possible
 
499
        # that the client timed out while establishing the GnuTLS
 
500
        # session.
 
501
        if not client.still_valid():
 
502
            logger.warning(u"Client %(name)s is invalid",
 
503
                           vars(client))
 
504
            session.bye()
 
505
            return
 
506
        sent_size = 0
 
507
        while sent_size < len(client.secret):
 
508
            sent = session.send(client.secret[sent_size:])
 
509
            logger.debug(u"Sent: %d, remaining: %d",
 
510
                         sent, len(client.secret)
 
511
                         - (sent_size + sent))
 
512
            sent_size += sent
 
513
        session.bye()
 
514
 
 
515
 
 
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
517
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1191
518
    Attributes:
 
519
        settings:       Server settings
 
520
        clients:        Set() of Client objects
1192
521
        enabled:        Boolean; whether this server is activated yet
1193
 
        interface:      None or a network interface name (string)
1194
 
        use_ipv6:       Boolean; to use IPv6 or not
1195
522
    """
1196
 
    def __init__(self, server_address, RequestHandlerClass,
1197
 
                 interface=None, use_ipv6=True):
1198
 
        self.interface = interface
1199
 
        if use_ipv6:
1200
 
            self.address_family = socket.AF_INET6
1201
 
        socketserver.TCPServer.__init__(self, server_address,
1202
 
                                        RequestHandlerClass)
 
523
    address_family = socket.AF_INET6
 
524
    def __init__(self, *args, **kwargs):
 
525
        if "settings" in kwargs:
 
526
            self.settings = kwargs["settings"]
 
527
            del kwargs["settings"]
 
528
        if "clients" in kwargs:
 
529
            self.clients = kwargs["clients"]
 
530
            del kwargs["clients"]
 
531
        self.enabled = False
 
532
        return super(type(self), self).__init__(*args, **kwargs)
1203
533
    def server_bind(self):
1204
534
        """This overrides the normal server_bind() function
1205
535
        to bind to an interface if one was specified, and also NOT to
1206
536
        bind to an address or port if they were not specified."""
1207
 
        if self.interface is not None:
1208
 
            if SO_BINDTODEVICE is None:
1209
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1210
 
                             u" cannot bind to interface %s",
1211
 
                             self.interface)
1212
 
            else:
1213
 
                try:
1214
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1215
 
                                           SO_BINDTODEVICE,
1216
 
                                           str(self.interface
1217
 
                                               + u'\0'))
1218
 
                except socket.error, error:
1219
 
                    if error[0] == errno.EPERM:
1220
 
                        logger.error(u"No permission to"
1221
 
                                     u" bind to interface %s",
1222
 
                                     self.interface)
1223
 
                    elif error[0] == errno.ENOPROTOOPT:
1224
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1225
 
                                     u" cannot bind to interface %s",
1226
 
                                     self.interface)
1227
 
                    else:
1228
 
                        raise
 
537
        if self.settings["interface"]:
 
538
            # 25 is from /usr/include/asm-i486/socket.h
 
539
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
540
            try:
 
541
                self.socket.setsockopt(socket.SOL_SOCKET,
 
542
                                       SO_BINDTODEVICE,
 
543
                                       self.settings["interface"])
 
544
            except socket.error, error:
 
545
                if error[0] == errno.EPERM:
 
546
                    logger.error(u"No permission to"
 
547
                                 u" bind to interface %s",
 
548
                                 self.settings["interface"])
 
549
                else:
 
550
                    raise error
1229
551
        # Only bind(2) the socket if we really need to.
1230
552
        if self.server_address[0] or self.server_address[1]:
1231
553
            if not self.server_address[0]:
1232
 
                if self.address_family == socket.AF_INET6:
1233
 
                    any_address = u"::" # in6addr_any
1234
 
                else:
1235
 
                    any_address = socket.INADDR_ANY
1236
 
                self.server_address = (any_address,
 
554
                in6addr_any = "::"
 
555
                self.server_address = (in6addr_any,
1237
556
                                       self.server_address[1])
1238
557
            elif not self.server_address[1]:
1239
558
                self.server_address = (self.server_address[0],
1240
559
                                       0)
1241
 
#                 if self.interface:
 
560
#                 if self.settings["interface"]:
1242
561
#                     self.server_address = (self.server_address[0],
1243
562
#                                            0, # port
1244
563
#                                            0, # flowinfo
1245
564
#                                            if_nametoindex
1246
 
#                                            (self.interface))
1247
 
            return socketserver.TCPServer.server_bind(self)
1248
 
 
1249
 
 
1250
 
class MandosServer(IPv6_TCPServer):
1251
 
    """Mandos server.
1252
 
    
1253
 
    Attributes:
1254
 
        clients:        set of Client objects
1255
 
        gnutls_priority GnuTLS priority string
1256
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1257
 
    
1258
 
    Assumes a gobject.MainLoop event loop.
1259
 
    """
1260
 
    def __init__(self, server_address, RequestHandlerClass,
1261
 
                 interface=None, use_ipv6=True, clients=None,
1262
 
                 gnutls_priority=None, use_dbus=True):
1263
 
        self.enabled = False
1264
 
        self.clients = clients
1265
 
        if self.clients is None:
1266
 
            self.clients = set()
1267
 
        self.use_dbus = use_dbus
1268
 
        self.gnutls_priority = gnutls_priority
1269
 
        IPv6_TCPServer.__init__(self, server_address,
1270
 
                                RequestHandlerClass,
1271
 
                                interface = interface,
1272
 
                                use_ipv6 = use_ipv6)
 
565
#                                            (self.settings
 
566
#                                             ["interface"]))
 
567
            return super(type(self), self).server_bind()
1273
568
    def server_activate(self):
1274
569
        if self.enabled:
1275
 
            return socketserver.TCPServer.server_activate(self)
 
570
            return super(type(self), self).server_activate()
1276
571
    def enable(self):
1277
572
        self.enabled = True
1278
 
    def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1279
 
        # Call "handle_ipc" for both data and EOF events
1280
 
        gobject.io_add_watch(child_pipe_fd.fileno(),
1281
 
                             gobject.IO_IN | gobject.IO_HUP,
1282
 
                             functools.partial(self.handle_ipc,
1283
 
                                               reply = parent_pipe_fd,
1284
 
                                               sender= child_pipe_fd))
1285
 
    def handle_ipc(self, source, condition, reply=None, sender=None):
1286
 
        condition_names = {
1287
 
            gobject.IO_IN: u"IN",   # There is data to read.
1288
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1289
 
                                    # blocking).
1290
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1291
 
            gobject.IO_ERR: u"ERR", # Error condition.
1292
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1293
 
                                    # broken, usually for pipes and
1294
 
                                    # sockets).
1295
 
            }
1296
 
        conditions_string = ' | '.join(name
1297
 
                                       for cond, name in
1298
 
                                       condition_names.iteritems()
1299
 
                                       if cond & condition)
1300
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1301
 
                     conditions_string)
1302
 
        
1303
 
        # Read a line from the file object
1304
 
        cmdline = sender.readline()
1305
 
        if not cmdline:             # Empty line means end of file
1306
 
            # close the IPC pipes
1307
 
            sender.close()
1308
 
            reply.close()
1309
 
            
1310
 
            # Stop calling this function
1311
 
            return False
1312
 
        
1313
 
        logger.debug(u"IPC command: %r", cmdline)
1314
 
        
1315
 
        # Parse and act on command
1316
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1317
 
        
1318
 
        if cmd == u"NOTFOUND":
1319
 
            fpr, address = args.split(None, 1)
1320
 
            logger.warning(u"Client not found for fingerprint: %s, ad"
1321
 
                           u"dress: %s", fpr, address)
1322
 
            if self.use_dbus:
1323
 
                # Emit D-Bus signal
1324
 
                mandos_dbus_service.ClientNotFound(fpr, address)
1325
 
        elif cmd == u"DISABLED":
1326
 
            for client in self.clients:
1327
 
                if client.name == args:
1328
 
                    logger.warning(u"Client %s is disabled", args)
1329
 
                    if self.use_dbus:
1330
 
                        # Emit D-Bus signal
1331
 
                        client.Rejected()
1332
 
                    break
1333
 
            else:
1334
 
                logger.error(u"Unknown client %s is disabled", args)
1335
 
        elif cmd == u"SENDING":
1336
 
            for client in self.clients:
1337
 
                if client.name == args:
1338
 
                    logger.info(u"Sending secret to %s", client.name)
1339
 
                    client.checked_ok()
1340
 
                    if self.use_dbus:
1341
 
                        # Emit D-Bus signal
1342
 
                        client.GotSecret()
1343
 
                    break
1344
 
            else:
1345
 
                logger.error(u"Sending secret to unknown client %s",
1346
 
                             args)
1347
 
        elif cmd == u"GETATTR":
1348
 
            attr_name, fpr = args.split(None, 1)
1349
 
            for client in self.clients:
1350
 
                if client.fingerprint == fpr:
1351
 
                    attr_value = getattr(client, attr_name, None)
1352
 
                    logger.debug("IPC reply: %r", attr_value)
1353
 
                    pickle.dump(attr_value, reply)
1354
 
                    break
1355
 
            else:
1356
 
                logger.error(u"Client %s on address %s requesting "
1357
 
                             u"attribute %s not found", fpr, address,
1358
 
                             attr_name)
1359
 
                pickle.dump(None, reply)
1360
 
        else:
1361
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1362
 
        
1363
 
        # Keep calling this function
1364
 
        return True
1365
573
 
1366
574
 
1367
575
def string_to_delta(interval):
1368
576
    """Parse a string and return a datetime.timedelta
1369
 
    
1370
 
    >>> string_to_delta(u'7d')
 
577
 
 
578
    >>> string_to_delta('7d')
1371
579
    datetime.timedelta(7)
1372
 
    >>> string_to_delta(u'60s')
 
580
    >>> string_to_delta('60s')
1373
581
    datetime.timedelta(0, 60)
1374
 
    >>> string_to_delta(u'60m')
 
582
    >>> string_to_delta('60m')
1375
583
    datetime.timedelta(0, 3600)
1376
 
    >>> string_to_delta(u'24h')
 
584
    >>> string_to_delta('24h')
1377
585
    datetime.timedelta(1)
1378
586
    >>> string_to_delta(u'1w')
1379
587
    datetime.timedelta(7)
1380
 
    >>> string_to_delta(u'5m 30s')
 
588
    >>> string_to_delta('5m 30s')
1381
589
    datetime.timedelta(0, 330)
1382
590
    """
1383
591
    timevalue = datetime.timedelta(0)
1384
592
    for s in interval.split():
1385
593
        try:
1386
 
            suffix = unicode(s[-1])
1387
 
            value = int(s[:-1])
 
594
            suffix=unicode(s[-1])
 
595
            value=int(s[:-1])
1388
596
            if suffix == u"d":
1389
597
                delta = datetime.timedelta(value)
1390
598
            elif suffix == u"s":
1396
604
            elif suffix == u"w":
1397
605
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1398
606
            else:
1399
 
                raise ValueError(u"Unknown suffix %r" % suffix)
1400
 
        except (ValueError, IndexError), e:
1401
 
            raise ValueError(e.message)
 
607
                raise ValueError
 
608
        except (ValueError, IndexError):
 
609
            raise ValueError
1402
610
        timevalue += delta
1403
611
    return timevalue
1404
612
 
1405
613
 
 
614
def server_state_changed(state):
 
615
    """Derived from the Avahi example code"""
 
616
    if state == avahi.SERVER_COLLISION:
 
617
        logger.error(u"Zeroconf server name collision")
 
618
        service.remove()
 
619
    elif state == avahi.SERVER_RUNNING:
 
620
        service.add()
 
621
 
 
622
 
 
623
def entry_group_state_changed(state, error):
 
624
    """Derived from the Avahi example code"""
 
625
    logger.debug(u"Avahi state change: %i", state)
 
626
    
 
627
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
628
        logger.debug(u"Zeroconf service established.")
 
629
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
630
        logger.warning(u"Zeroconf service name collision.")
 
631
        service.rename()
 
632
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
633
        logger.critical(u"Avahi: Error in group state changed %s",
 
634
                        unicode(error))
 
635
        raise AvahiGroupError("State changed: %s", str(error))
 
636
 
1406
637
def if_nametoindex(interface):
1407
 
    """Call the C function if_nametoindex(), or equivalent
1408
 
    
1409
 
    Note: This function cannot accept a unicode string."""
 
638
    """Call the C function if_nametoindex(), or equivalent"""
1410
639
    global if_nametoindex
1411
640
    try:
1412
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1413
 
                          (ctypes.util.find_library(u"c"))
1414
 
                          .if_nametoindex)
 
641
        if "ctypes.util" not in sys.modules:
 
642
            import ctypes.util
 
643
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
644
            (ctypes.util.find_library("c")).if_nametoindex
1415
645
    except (OSError, AttributeError):
1416
 
        logger.warning(u"Doing if_nametoindex the hard way")
 
646
        if "struct" not in sys.modules:
 
647
            import struct
 
648
        if "fcntl" not in sys.modules:
 
649
            import fcntl
1417
650
        def if_nametoindex(interface):
1418
651
            "Get an interface index the hard way, i.e. using fcntl()"
1419
652
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1420
 
            with contextlib.closing(socket.socket()) as s:
1421
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1422
 
                                    struct.pack(str(u"16s16x"),
1423
 
                                                interface))
1424
 
            interface_index = struct.unpack(str(u"I"),
1425
 
                                            ifreq[16:20])[0]
 
653
            s = socket.socket()
 
654
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
655
                                struct.pack("16s16x", interface))
 
656
            s.close()
 
657
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1426
658
            return interface_index
1427
659
    return if_nametoindex(interface)
1428
660
 
1429
661
 
1430
662
def daemon(nochdir = False, noclose = False):
1431
663
    """See daemon(3).  Standard BSD Unix function.
1432
 
    
1433
664
    This should really exist as os.daemon, but it doesn't (yet)."""
1434
665
    if os.fork():
1435
666
        sys.exit()
1436
667
    os.setsid()
1437
668
    if not nochdir:
1438
 
        os.chdir(u"/")
 
669
        os.chdir("/")
1439
670
    if os.fork():
1440
671
        sys.exit()
1441
672
    if not noclose:
1443
674
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1444
675
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1445
676
            raise OSError(errno.ENODEV,
1446
 
                          u"%s not a character device"
1447
 
                          % os.path.devnull)
 
677
                          "/dev/null not a character device")
1448
678
        os.dup2(null, sys.stdin.fileno())
1449
679
        os.dup2(null, sys.stdout.fileno())
1450
680
        os.dup2(null, sys.stderr.fileno())
1453
683
 
1454
684
 
1455
685
def main():
1456
 
    
1457
 
    ##################################################################
1458
 
    # Parsing of options, both command line and config file
1459
 
    
1460
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1461
 
    parser.add_option("-i", u"--interface", type=u"string",
1462
 
                      metavar="IF", help=u"Bind to interface IF")
1463
 
    parser.add_option("-a", u"--address", type=u"string",
1464
 
                      help=u"Address to listen for requests on")
1465
 
    parser.add_option("-p", u"--port", type=u"int",
1466
 
                      help=u"Port number to receive requests on")
1467
 
    parser.add_option("--check", action=u"store_true",
1468
 
                      help=u"Run self-test")
1469
 
    parser.add_option("--debug", action=u"store_true",
1470
 
                      help=u"Debug mode; run in foreground and log to"
1471
 
                      u" terminal")
1472
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1473
 
                      u" priority string (see GnuTLS documentation)")
1474
 
    parser.add_option("--servicename", type=u"string",
1475
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1476
 
    parser.add_option("--configdir", type=u"string",
1477
 
                      default=u"/etc/mandos", metavar=u"DIR",
1478
 
                      help=u"Directory to search for configuration"
1479
 
                      u" files")
1480
 
    parser.add_option("--no-dbus", action=u"store_false",
1481
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1482
 
                      u" system bus interface")
1483
 
    parser.add_option("--no-ipv6", action=u"store_false",
1484
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
1485
 
    options = parser.parse_args()[0]
 
686
    global main_loop_started
 
687
    main_loop_started = False
 
688
    
 
689
    parser = OptionParser(version = "%%prog %s" % version)
 
690
    parser.add_option("-i", "--interface", type="string",
 
691
                      metavar="IF", help="Bind to interface IF")
 
692
    parser.add_option("-a", "--address", type="string",
 
693
                      help="Address to listen for requests on")
 
694
    parser.add_option("-p", "--port", type="int",
 
695
                      help="Port number to receive requests on")
 
696
    parser.add_option("--check", action="store_true", default=False,
 
697
                      help="Run self-test")
 
698
    parser.add_option("--debug", action="store_true",
 
699
                      help="Debug mode; run in foreground and log to"
 
700
                      " terminal")
 
701
    parser.add_option("--priority", type="string", help="GnuTLS"
 
702
                      " priority string (see GnuTLS documentation)")
 
703
    parser.add_option("--servicename", type="string", metavar="NAME",
 
704
                      help="Zeroconf service name")
 
705
    parser.add_option("--configdir", type="string",
 
706
                      default="/etc/mandos", metavar="DIR",
 
707
                      help="Directory to search for configuration"
 
708
                      " files")
 
709
    (options, args) = parser.parse_args()
1486
710
    
1487
711
    if options.check:
1488
712
        import doctest
1490
714
        sys.exit()
1491
715
    
1492
716
    # Default values for config file for server-global settings
1493
 
    server_defaults = { u"interface": u"",
1494
 
                        u"address": u"",
1495
 
                        u"port": u"",
1496
 
                        u"debug": u"False",
1497
 
                        u"priority":
1498
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1499
 
                        u"servicename": u"Mandos",
1500
 
                        u"use_dbus": u"True",
1501
 
                        u"use_ipv6": u"True",
 
717
    server_defaults = { "interface": "",
 
718
                        "address": "",
 
719
                        "port": "",
 
720
                        "debug": "False",
 
721
                        "priority":
 
722
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
723
                        "servicename": "Mandos",
1502
724
                        }
1503
725
    
1504
726
    # Parse config file for server-global settings
1505
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1506
728
    del server_defaults
1507
 
    server_config.read(os.path.join(options.configdir,
1508
 
                                    u"mandos.conf"))
 
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1509
730
    # Convert the SafeConfigParser object to a dict
1510
731
    server_settings = server_config.defaults()
1511
 
    # Use the appropriate methods on the non-string config options
1512
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1513
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1514
 
                                                           option)
1515
 
    if server_settings["port"]:
1516
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1517
 
                                                       u"port")
 
732
    # Use getboolean on the boolean config option
 
733
    server_settings["debug"] = server_config.getboolean\
 
734
                               ("DEFAULT", "debug")
1518
735
    del server_config
1519
736
    
1520
737
    # Override the settings from the config file with command line
1521
738
    # options, if set.
1522
 
    for option in (u"interface", u"address", u"port", u"debug",
1523
 
                   u"priority", u"servicename", u"configdir",
1524
 
                   u"use_dbus", u"use_ipv6"):
 
739
    for option in ("interface", "address", "port", "debug",
 
740
                   "priority", "servicename", "configdir"):
1525
741
        value = getattr(options, option)
1526
742
        if value is not None:
1527
743
            server_settings[option] = value
1528
744
    del options
1529
 
    # Force all strings to be unicode
1530
 
    for option in server_settings.keys():
1531
 
        if type(server_settings[option]) is str:
1532
 
            server_settings[option] = unicode(server_settings[option])
1533
745
    # Now we have our good server settings in "server_settings"
1534
746
    
1535
 
    ##################################################################
1536
 
    
1537
 
    # For convenience
1538
 
    debug = server_settings[u"debug"]
1539
 
    use_dbus = server_settings[u"use_dbus"]
1540
 
    use_ipv6 = server_settings[u"use_ipv6"]
 
747
    debug = server_settings["debug"]
1541
748
    
1542
749
    if not debug:
1543
750
        syslogger.setLevel(logging.WARNING)
1544
751
        console.setLevel(logging.WARNING)
1545
752
    
1546
 
    if server_settings[u"servicename"] != u"Mandos":
1547
 
        syslogger.setFormatter(logging.Formatter
1548
 
                               (u'Mandos (%s) [%%(process)d]:'
1549
 
                                u' %%(levelname)s: %%(message)s'
1550
 
                                % server_settings[u"servicename"]))
 
753
    if server_settings["servicename"] != "Mandos":
 
754
        syslogger.setFormatter(logging.Formatter\
 
755
                               ('Mandos (%s): %%(levelname)s:'
 
756
                                ' %%(message)s'
 
757
                                % server_settings["servicename"]))
1551
758
    
1552
759
    # Parse config file with clients
1553
 
    client_defaults = { u"timeout": u"1h",
1554
 
                        u"interval": u"5m",
1555
 
                        u"checker": u"fping -q -- %%(host)s",
1556
 
                        u"host": u"",
 
760
    client_defaults = { "timeout": "1h",
 
761
                        "interval": "5m",
 
762
                        "checker": "fping -q -- %(host)s",
 
763
                        "host": "",
1557
764
                        }
1558
 
    client_config = configparser.SafeConfigParser(client_defaults)
1559
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1560
 
                                    u"clients.conf"))
1561
 
    
1562
 
    global mandos_dbus_service
1563
 
    mandos_dbus_service = None
1564
 
    
1565
 
    tcp_server = MandosServer((server_settings[u"address"],
1566
 
                               server_settings[u"port"]),
1567
 
                              ClientHandler,
1568
 
                              interface=(server_settings[u"interface"]
1569
 
                                         or None),
1570
 
                              use_ipv6=use_ipv6,
1571
 
                              gnutls_priority=
1572
 
                              server_settings[u"priority"],
1573
 
                              use_dbus=use_dbus)
1574
 
    pidfilename = u"/var/run/mandos.pid"
1575
 
    try:
1576
 
        pidfile = open(pidfilename, u"w")
1577
 
    except IOError:
1578
 
        logger.error(u"Could not open file %r", pidfilename)
1579
 
    
1580
 
    try:
1581
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1582
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1583
 
    except KeyError:
1584
 
        try:
1585
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1586
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1587
 
        except KeyError:
1588
 
            try:
1589
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1590
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1591
 
            except KeyError:
1592
 
                uid = 65534
1593
 
                gid = 65534
1594
 
    try:
 
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
766
    client_config.read(os.path.join(server_settings["configdir"],
 
767
                                    "clients.conf"))
 
768
    
 
769
    clients = Set()
 
770
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
771
                                 server_settings["port"]),
 
772
                                tcp_handler,
 
773
                                settings=server_settings,
 
774
                                clients=clients)
 
775
    pidfilename = "/var/run/mandos.pid"
 
776
    try:
 
777
        pidfile = open(pidfilename, "w")
 
778
    except IOError, error:
 
779
        logger.error("Could not open file %r", pidfilename)
 
780
    
 
781
    uid = 65534
 
782
    gid = 65534
 
783
    try:
 
784
        uid = pwd.getpwnam("mandos").pw_uid
 
785
    except KeyError:
 
786
        try:
 
787
            uid = pwd.getpwnam("nobody").pw_uid
 
788
        except KeyError:
 
789
            pass
 
790
    try:
 
791
        gid = pwd.getpwnam("mandos").pw_gid
 
792
    except KeyError:
 
793
        try:
 
794
            gid = pwd.getpwnam("nogroup").pw_gid
 
795
        except KeyError:
 
796
            pass
 
797
    try:
 
798
        os.setuid(uid)
1595
799
        os.setgid(gid)
1596
 
        os.setuid(uid)
1597
800
    except OSError, error:
1598
801
        if error[0] != errno.EPERM:
1599
802
            raise error
1600
803
    
1601
 
    # Enable all possible GnuTLS debugging
1602
 
    if debug:
1603
 
        # "Use a log level over 10 to enable all debugging options."
1604
 
        # - GnuTLS manual
1605
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1606
 
        
1607
 
        @gnutls.library.types.gnutls_log_func
1608
 
        def debug_gnutls(level, string):
1609
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1610
 
        
1611
 
        (gnutls.library.functions
1612
 
         .gnutls_global_set_log_function(debug_gnutls))
 
804
    global service
 
805
    service = AvahiService(name = server_settings["servicename"],
 
806
                           type = "_mandos._tcp", );
 
807
    if server_settings["interface"]:
 
808
        service.interface = if_nametoindex\
 
809
                            (server_settings["interface"])
1613
810
    
1614
811
    global main_loop
 
812
    global bus
 
813
    global server
1615
814
    # From the Avahi example code
1616
815
    DBusGMainLoop(set_as_default=True )
1617
816
    main_loop = gobject.MainLoop()
1618
817
    bus = dbus.SystemBus()
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
1619
821
    # End of Avahi example code
1620
 
    if use_dbus:
1621
 
        try:
1622
 
            bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1623
 
                                            bus, do_not_queue=True)
1624
 
        except dbus.exceptions.NameExistsException, e:
1625
 
            logger.error(unicode(e) + u", disabling D-Bus")
1626
 
            use_dbus = False
1627
 
            server_settings[u"use_dbus"] = False
1628
 
            tcp_server.use_dbus = False
1629
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1630
 
    service = AvahiService(name = server_settings[u"servicename"],
1631
 
                           servicetype = u"_mandos._tcp",
1632
 
                           protocol = protocol, bus = bus)
1633
 
    if server_settings["interface"]:
1634
 
        service.interface = (if_nametoindex
1635
 
                             (str(server_settings[u"interface"])))
1636
 
    
1637
 
    client_class = Client
1638
 
    if use_dbus:
1639
 
        client_class = functools.partial(ClientDBus, bus = bus)
1640
 
    tcp_server.clients.update(set(
1641
 
            client_class(name = section,
1642
 
                         config= dict(client_config.items(section)))
1643
 
            for section in client_config.sections()))
1644
 
    if not tcp_server.clients:
1645
 
        logger.warning(u"No clients defined")
 
822
    
 
823
    def remove_from_clients(client):
 
824
        clients.remove(client)
 
825
        if not clients:
 
826
            logger.critical(u"No clients left, exiting")
 
827
            sys.exit()
 
828
    
 
829
    clients.update(Set(Client(name = section,
 
830
                              stop_hook = remove_from_clients,
 
831
                              config
 
832
                              = dict(client_config.items(section)))
 
833
                       for section in client_config.sections()))
 
834
    if not clients:
 
835
        logger.critical(u"No clients defined")
 
836
        sys.exit(1)
1646
837
    
1647
838
    if debug:
1648
839
        # Redirect stdin so all checkers get /dev/null
1657
848
        daemon()
1658
849
    
1659
850
    try:
1660
 
        with pidfile:
1661
 
            pid = os.getpid()
1662
 
            pidfile.write(str(pid) + "\n")
 
851
        pid = os.getpid()
 
852
        pidfile.write(str(pid) + "\n")
 
853
        pidfile.close()
1663
854
        del pidfile
1664
 
    except IOError:
 
855
    except IOError, err:
1665
856
        logger.error(u"Could not write to file %r with PID %d",
1666
857
                     pidfilename, pid)
1667
858
    except NameError:
1669
860
        pass
1670
861
    del pidfilename
1671
862
    
 
863
    def cleanup():
 
864
        "Cleanup function; run on exit"
 
865
        global group
 
866
        # From the Avahi example code
 
867
        if not group is None:
 
868
            group.Free()
 
869
            group = None
 
870
        # End of Avahi example code
 
871
        
 
872
        while clients:
 
873
            client = clients.pop()
 
874
            client.stop_hook = None
 
875
            client.stop()
 
876
    
 
877
    atexit.register(cleanup)
 
878
    
1672
879
    if not debug:
1673
880
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1674
881
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1675
882
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1676
883
    
1677
 
    if use_dbus:
1678
 
        class MandosDBusService(dbus.service.Object):
1679
 
            """A D-Bus proxy object"""
1680
 
            def __init__(self):
1681
 
                dbus.service.Object.__init__(self, bus, u"/")
1682
 
            _interface = u"se.bsnet.fukt.Mandos"
1683
 
            
1684
 
            @dbus.service.signal(_interface, signature=u"o")
1685
 
            def ClientAdded(self, objpath):
1686
 
                "D-Bus signal"
1687
 
                pass
1688
 
            
1689
 
            @dbus.service.signal(_interface, signature=u"ss")
1690
 
            def ClientNotFound(self, fingerprint, address):
1691
 
                "D-Bus signal"
1692
 
                pass
1693
 
            
1694
 
            @dbus.service.signal(_interface, signature=u"os")
1695
 
            def ClientRemoved(self, objpath, name):
1696
 
                "D-Bus signal"
1697
 
                pass
1698
 
            
1699
 
            @dbus.service.method(_interface, out_signature=u"ao")
1700
 
            def GetAllClients(self):
1701
 
                "D-Bus method"
1702
 
                return dbus.Array(c.dbus_object_path
1703
 
                                  for c in tcp_server.clients)
1704
 
            
1705
 
            @dbus.service.method(_interface,
1706
 
                                 out_signature=u"a{oa{sv}}")
1707
 
            def GetAllClientsWithProperties(self):
1708
 
                "D-Bus method"
1709
 
                return dbus.Dictionary(
1710
 
                    ((c.dbus_object_path, c.GetAll(u""))
1711
 
                     for c in tcp_server.clients),
1712
 
                    signature=u"oa{sv}")
1713
 
            
1714
 
            @dbus.service.method(_interface, in_signature=u"o")
1715
 
            def RemoveClient(self, object_path):
1716
 
                "D-Bus method"
1717
 
                for c in tcp_server.clients:
1718
 
                    if c.dbus_object_path == object_path:
1719
 
                        tcp_server.clients.remove(c)
1720
 
                        c.remove_from_connection()
1721
 
                        # Don't signal anything except ClientRemoved
1722
 
                        c.disable(quiet=True)
1723
 
                        # Emit D-Bus signal
1724
 
                        self.ClientRemoved(object_path, c.name)
1725
 
                        return
1726
 
                raise KeyError(object_path)
1727
 
            
1728
 
            del _interface
1729
 
        
1730
 
        mandos_dbus_service = MandosDBusService()
1731
 
    
1732
 
    def cleanup():
1733
 
        "Cleanup function; run on exit"
1734
 
        service.cleanup()
1735
 
        
1736
 
        while tcp_server.clients:
1737
 
            client = tcp_server.clients.pop()
1738
 
            if use_dbus:
1739
 
                client.remove_from_connection()
1740
 
            client.disable_hook = None
1741
 
            # Don't signal anything except ClientRemoved
1742
 
            client.disable(quiet=True)
1743
 
            if use_dbus:
1744
 
                # Emit D-Bus signal
1745
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1746
 
                                                  client.name)
1747
 
    
1748
 
    atexit.register(cleanup)
1749
 
    
1750
 
    for client in tcp_server.clients:
1751
 
        if use_dbus:
1752
 
            # Emit D-Bus signal
1753
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
1754
 
        client.enable()
 
884
    for client in clients:
 
885
        client.start()
1755
886
    
1756
887
    tcp_server.enable()
1757
888
    tcp_server.server_activate()
1758
889
    
1759
890
    # Find out what port we got
1760
891
    service.port = tcp_server.socket.getsockname()[1]
1761
 
    if use_ipv6:
1762
 
        logger.info(u"Now listening on address %r, port %d,"
1763
 
                    " flowinfo %d, scope_id %d"
1764
 
                    % tcp_server.socket.getsockname())
1765
 
    else:                       # IPv4
1766
 
        logger.info(u"Now listening on address %r, port %d"
1767
 
                    % tcp_server.socket.getsockname())
 
892
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
893
                u" scope_id %d" % tcp_server.socket.getsockname())
1768
894
    
1769
895
    #service.interface = tcp_server.socket.getsockname()[3]
1770
896
    
1771
897
    try:
1772
898
        # From the Avahi example code
 
899
        server.connect_to_signal("StateChanged", server_state_changed)
1773
900
        try:
1774
 
            service.activate()
 
901
            server_state_changed(server.GetState())
1775
902
        except dbus.exceptions.DBusException, error:
1776
903
            logger.critical(u"DBusException: %s", error)
1777
 
            cleanup()
1778
904
            sys.exit(1)
1779
905
        # End of Avahi example code
1780
906
        
1781
907
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1782
908
                             lambda *args, **kwargs:
1783
 
                             (tcp_server.handle_request
1784
 
                              (*args[2:], **kwargs) or True))
 
909
                             tcp_server.handle_request\
 
910
                             (*args[2:], **kwargs) or True)
1785
911
        
1786
912
        logger.debug(u"Starting main loop")
 
913
        main_loop_started = True
1787
914
        main_loop.run()
1788
915
    except AvahiError, error:
1789
 
        logger.critical(u"AvahiError: %s", error)
1790
 
        cleanup()
 
916
        logger.critical(u"AvahiError: %s" + unicode(error))
1791
917
        sys.exit(1)
1792
918
    except KeyboardInterrupt:
1793
919
        if debug:
1794
 
            print >> sys.stderr
1795
 
        logger.debug(u"Server received KeyboardInterrupt")
1796
 
    logger.debug(u"Server exiting")
1797
 
    # Must run before the D-Bus bus name gets deregistered
1798
 
    cleanup()
 
920
            print
1799
921
 
1800
922
if __name__ == '__main__':
1801
923
    main()