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- Committer: Björn Påhlsson
- Date: 2008-07-22 05:26:44 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 26.
- Revision ID: belorn@braxen-20080722052644-tq76a3jnr2ea1jez
Added syntax and support for plugbasedclient arguments and how they
are passed on to the plugins.
are passed on to the plugins.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# 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
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
35
import SocketServer
38
36
import socket
39
import argparse
37
import select
38
from optparse import OptionParser
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
58
67
59
import dbus
68
import dbus.service
69
60
import gobject
70
61
import avahi
71
62
from dbus.mainloop.glib import DBusGMainLoop
72
63
import ctypes
73
import ctypes.util
74
import xml.dom.minidom
75
import inspect
76
77
try:
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
except AttributeError:
80
try:
81
from IN import SO_BINDTODEVICE
82
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
89
77
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
96
82
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
103
104
class AvahiError(Exception):
105
def __init__(self, value, *args, **kwargs):
106
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
110
111
class AvahiServiceError(AvahiError):
112
pass
113
114
class AvahiGroupError(AvahiError):
115
pass
116
117
118
class AvahiService(object):
119
"""An Avahi (Zeroconf) service.
120
121
Attributes:
122
interface: integer; avahi.IF_UNSPEC or an interface index.
123
Used to optionally bind to the specified interface.
124
name: string; Example: 'Mandos'
125
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
127
port: integer; what port to announce
128
TXT: list of strings; TXT record for the service
129
domain: string; Domain to publish on, default to .local if empty.
130
host: string; Host to publish records for, default is localhost
131
max_renames: integer; maximum number of renames
132
rename_count: integer; counter so we only rename after collisions
133
a sensible number of times
134
group: D-Bus Entry Group
135
server: D-Bus Server
136
bus: dbus.SystemBus()
137
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
142
self.interface = interface
143
self.name = name
144
self.type = servicetype
145
self.port = port
146
self.TXT = TXT if TXT is not None else []
147
self.domain = domain
148
self.host = host
149
self.rename_count = 0
150
self.max_renames = max_renames
151
self.protocol = protocol
152
self.group = None # our entry group
153
self.server = None
154
self.bus = bus
155
self.entry_group_state_changed_match = None
156
def rename(self):
157
"""Derived from the Avahi example code"""
158
if self.rename_count >= self.max_renames:
159
logger.critical("No suitable Zeroconf service name found"
160
" after %i retries, exiting.",
161
self.rename_count)
162
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
164
logger.info("Changing Zeroconf service name to %r ...",
165
self.name)
166
syslogger.setFormatter(logging.Formatter
167
('Mandos (%s) [%%(process)d]:'
168
' %%(levelname)s: %%(message)s'
169
% self.name))
170
self.remove()
171
try:
172
self.add()
173
except dbus.exceptions.DBusException as error:
174
logger.critical("DBusException: %s", error)
175
self.cleanup()
176
os._exit(1)
177
self.rename_count += 1
178
def remove(self):
179
"""Derived from the Avahi example code"""
180
if self.entry_group_state_changed_match is not None:
181
self.entry_group_state_changed_match.remove()
182
self.entry_group_state_changed_match = None
183
if self.group is not None:
184
self.group.Reset()
185
def add(self):
186
"""Derived from the Avahi example code"""
187
self.remove()
188
if self.group is None:
189
self.group = dbus.Interface(
190
self.bus.get_object(avahi.DBUS_NAME,
191
self.server.EntryGroupNew()),
192
avahi.DBUS_INTERFACE_ENTRY_GROUP)
193
self.entry_group_state_changed_match = (
194
self.group.connect_to_signal(
195
'StateChanged', self .entry_group_state_changed))
196
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
197
self.name, self.type)
198
self.group.AddService(
199
self.interface,
200
self.protocol,
201
dbus.UInt32(0), # flags
202
self.name, self.type,
203
self.domain, self.host,
204
dbus.UInt16(self.port),
205
avahi.string_array_to_txt_array(self.TXT))
206
self.group.Commit()
207
def entry_group_state_changed(self, state, error):
208
"""Derived from the Avahi example code"""
209
logger.debug("Avahi entry group state change: %i", state)
210
211
if state == avahi.ENTRY_GROUP_ESTABLISHED:
212
logger.debug("Zeroconf service established.")
213
elif state == avahi.ENTRY_GROUP_COLLISION:
214
logger.info("Zeroconf service name collision.")
215
self.rename()
216
elif state == avahi.ENTRY_GROUP_FAILURE:
217
logger.critical("Avahi: Error in group state changed %s",
218
unicode(error))
219
raise AvahiGroupError("State changed: %s"
220
% unicode(error))
221
def cleanup(self):
222
"""Derived from the Avahi example code"""
223
if self.group is not None:
224
try:
225
self.group.Free()
226
except (dbus.exceptions.UnknownMethodException,
227
dbus.exceptions.DBusException) as e:
228
pass
229
self.group = None
230
self.remove()
231
def server_state_changed(self, state, error=None):
232
"""Derived from the Avahi example code"""
233
logger.debug("Avahi server state change: %i", state)
234
bad_states = { avahi.SERVER_INVALID:
235
"Zeroconf server invalid",
236
avahi.SERVER_REGISTERING: None,
237
avahi.SERVER_COLLISION:
238
"Zeroconf server name collision",
239
avahi.SERVER_FAILURE:
240
"Zeroconf server failure" }
241
if state in bad_states:
242
if bad_states[state] is not None:
243
if error is None:
244
logger.error(bad_states[state])
245
else:
246
logger.error(bad_states[state] + ": %r", error)
247
self.cleanup()
248
elif state == avahi.SERVER_RUNNING:
249
self.add()
250
else:
251
if error is None:
252
logger.debug("Unknown state: %r", state)
253
else:
254
logger.debug("Unknown state: %r: %r", state, error)
255
def activate(self):
256
"""Derived from the Avahi example code"""
257
if self.server is None:
258
self.server = dbus.Interface(
259
self.bus.get_object(avahi.DBUS_NAME,
260
avahi.DBUS_PATH_SERVER,
261
follow_name_owner_changes=True),
262
avahi.DBUS_INTERFACE_SERVER)
263
self.server.connect_to_signal("StateChanged",
264
self.server_state_changed)
265
self.server_state_changed(self.server.GetState())
266
267
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
89
# From the Avahi example code:
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
100
101
274
102
class Client(object):
275
103
"""A representation of a client host served by this server.
276
277
104
Attributes:
278
_approved: bool(); 'None' if not yet approved/disapproved
279
approval_delay: datetime.timedelta(); Time to wait for approval
280
approval_duration: datetime.timedelta(); Duration of one approval
281
checker: subprocess.Popen(); a running checker process used
282
to see if the client lives.
283
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
285
checker_command: string; External command which is run to check
286
if client lives. %() expansions are done at
105
name: string; from the config file, used in log messages
106
fingerprint: string (40 or 32 hexadecimal digits); used to
107
uniquely identify the client
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
119
checker_initiator_tag: a gobject event source tag, or None
120
stop_initiator_tag: - '' -
121
checker_callback_tag: - '' -
122
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
287
124
runtime with vars(self) as dict, so that for
288
125
instance %(name)s can be used in the command.
289
checker_initiator_tag: a gobject event source tag, or None
290
created: datetime.datetime(); (UTC) object creation
291
current_checker_command: string; current running checker_command
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
294
enabled: bool()
295
fingerprint: string (40 or 32 hexadecimal digits); used to
296
uniquely identify the client
297
host: string; available for use by the checker command
298
interval: datetime.timedelta(); How often to start a new checker
299
last_approval_request: datetime.datetime(); (UTC) or None
300
last_checked_ok: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
302
name: string; from the config file, used in log messages and
303
D-Bus identifiers
304
secret: bytestring; sent verbatim (over TLS) to client
305
timeout: datetime.timedelta(); How long from last_checked_ok
306
until this client is disabled
307
extended_timeout: extra long timeout when password has been sent
308
runtime_expansions: Allowed attributes for runtime expansion.
309
expires: datetime.datetime(); time (UTC) when a client will be
310
disabled, or None
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
311
131
"""
312
313
runtime_expansions = ("approval_delay", "approval_duration",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
316
"last_enabled", "name", "timeout")
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
337
160
self.name = name
338
if config is None:
339
config = {}
340
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
346
logger.debug(" Fingerprint: %s", self.fingerprint)
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
169
self.secret = sf.read()
170
sf.close()
171
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
175
self.created = datetime.datetime.now()
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
185
self.stop_hook = stop_hook
367
186
self.checker = None
368
187
self.checker_initiator_tag = None
369
self.disable_initiator_tag = None
370
self.expires = None
188
self.stop_initiator_tag = None
371
189
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
378
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
384
385
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
390
def enable(self):
190
self.check_command = checker
191
def start(self):
391
192
"""Start this client's checker and timeout hooks"""
392
if getattr(self, "enabled", False):
393
# Already enabled
394
return
395
self.send_changedstate()
396
193
# Schedule a new checker to be started an 'interval' from now,
397
194
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
400
self.start_checker))
401
# Schedule a disable() when 'timeout' has passed
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
405
self.disable))
406
self.enabled = True
407
self.last_enabled = datetime.datetime.utcnow()
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
408
198
# Also start a new checker *right now*.
409
199
self.start_checker()
410
411
def disable(self, quiet=True):
412
"""Disable this client."""
413
if not getattr(self, "enabled", False):
200
# Schedule a stop() when 'timeout' has passed
201
self.stop_initiator_tag = gobject.timeout_add\
202
(self._timeout_milliseconds,
203
self.stop)
204
def stop(self):
205
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
208
# If this client doesn't have a secret, it is already stopped.
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
211
self.secret = None
212
else:
414
213
return False
415
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = None
422
self.expires = None
423
if getattr(self, "checker_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
216
gobject.source_remove(self.stop_initiator_tag)
217
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
424
220
gobject.source_remove(self.checker_initiator_tag)
425
221
self.checker_initiator_tag = None
426
222
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
self.enabled = False
223
if self.stop_hook:
224
self.stop_hook(self)
430
225
# Do not run this again if called by a gobject.timeout_add
431
226
return False
432
433
227
def __del__(self):
434
self.disable_hook = None
435
self.disable()
436
437
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
438
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
439
233
self.checker_callback_tag = None
440
234
self.checker = None
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
444
logger.info("Checker for %(name)s succeeded",
445
vars(self))
446
self.checked_ok()
447
else:
448
logger.info("Checker for %(name)s failed",
449
vars(self))
450
else:
451
logger.warning("Checker for %(name)s crashed?",
235
if os.WIFEXITED(condition) \
236
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
240
gobject.source_remove(self.stop_initiator_tag)
241
self.stop_initiator_tag = gobject.timeout_add\
242
(self._timeout_milliseconds,
243
self.stop)
244
elif not os.WIFEXITED(condition):
245
logger.warning(u"Checker for %(name)s crashed?",
452
246
vars(self))
453
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
460
if timeout is None:
461
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
467
self.disable))
468
469
def need_approval(self):
470
self.last_approval_request = datetime.datetime.utcnow()
471
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
472
250
def start_checker(self):
473
251
"""Start a new checker subprocess if one is not running.
474
475
252
If a checker already exists, leave it running and do
476
253
nothing."""
477
254
# The reason for not killing a running checker is that if we
480
257
# client would inevitably timeout, since no checker would get
481
258
# a chance to run to completion. If we instead leave running
482
259
# checkers alone, the checker would have to take more time
483
# than 'timeout' for the client to be disabled, which is as it
484
# should be.
485
486
# If a checker exists, make sure it is not a zombie
487
try:
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
493
else:
494
if pid:
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
499
# Start a new checker if needed
260
# than 'timeout' for the client to be declared invalid, which
261
# is as it should be.
500
262
if self.checker is None:
501
263
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
504
265
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
266
escaped_attrs = dict((key, re.escape(str(val)))
267
for key, val in
268
vars(self).iteritems())
514
269
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
270
command = self.check_command % escaped_attrs
271
except TypeError, error:
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
519
274
return True # Try again later
520
self.current_checker_command = command
521
275
try:
522
logger.info("Starting checker %r for %s",
523
command, self.name)
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
529
close_fds=True,
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
286
logger.error(u"Failed to start subprocess: %s",
543
287
error)
544
288
# Re-run this periodically if run by gobject.timeout_add
545
289
return True
546
547
290
def stop_checker(self):
548
291
"""Force the checker process, if any, to stop."""
549
292
if self.checker_callback_tag:
550
293
gobject.source_remove(self.checker_callback_tag)
551
294
self.checker_callback_tag = None
552
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
553
296
return
554
297
logger.debug("Stopping checker for %(name)s", vars(self))
555
298
try:
556
299
os.kill(self.checker.pid, signal.SIGTERM)
557
#time.sleep(0.5)
300
#os.sleep(0.5)
558
301
#if self.checker.poll() is None:
559
302
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
303
except OSError, error:
304
if error.errno != errno.ESRCH:
562
305
raise
563
306
self.checker = None
564
565
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
568
"""Decorators for marking methods of a DBusObjectWithProperties to
569
become properties on the D-Bus.
570
571
The decorated method will be called with no arguments by "Get"
572
and with one argument by "Set".
573
574
The parameters, where they are supported, are the same as
575
dbus.service.method, except there is only "signature", since the
576
type from Get() and the type sent to Set() is the same.
577
"""
578
# Encoding deeply encoded byte arrays is not supported yet by the
579
# "Set" method, so we fail early here:
580
if byte_arrays and signature != "ay":
581
raise ValueError("Byte arrays not supported for non-'ay'"
582
" signature %r" % signature)
583
def decorator(func):
584
func._dbus_is_property = True
585
func._dbus_interface = dbus_interface
586
func._dbus_signature = signature
587
func._dbus_access = access
588
func._dbus_name = func.__name__
589
if func._dbus_name.endswith("_dbus_property"):
590
func._dbus_name = func._dbus_name[:-14]
591
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
592
return func
593
return decorator
594
595
596
class DBusPropertyException(dbus.exceptions.DBusException):
597
"""A base class for D-Bus property-related exceptions
598
"""
599
def __unicode__(self):
600
return unicode(str(self))
601
602
603
class DBusPropertyAccessException(DBusPropertyException):
604
"""A property's access permissions disallows an operation.
605
"""
606
pass
607
608
609
class DBusPropertyNotFound(DBusPropertyException):
610
"""An attempt was made to access a non-existing property.
611
"""
612
pass
613
614
615
class DBusObjectWithProperties(dbus.service.Object):
616
"""A D-Bus object with properties.
617
618
Classes inheriting from this can use the dbus_service_property
619
decorator to expose methods as D-Bus properties. It exposes the
620
standard Get(), Set(), and GetAll() methods on the D-Bus.
621
"""
622
623
@staticmethod
624
def _is_dbus_property(obj):
625
return getattr(obj, "_dbus_is_property", False)
626
627
def _get_all_dbus_properties(self):
628
"""Returns a generator of (name, attribute) pairs
629
"""
630
return ((prop._dbus_name, prop)
631
for name, prop in
632
inspect.getmembers(self, self._is_dbus_property))
633
634
# def _get_dbus_property(self, interface_name, property_name):
635
# """Returns a bound method if one exists which is a D-Bus
636
# property with the specified name and interface.
637
# """
638
# print("get_property({0!r}, {1!r}".format(interface_name, property_name),file=sys.stderr)
639
# print(dir(self), sys.stderr)
640
# for name in (property_name,
641
# property_name + "_dbus_property"):
642
# prop = getattr(self, name, None)
643
# if (prop is None
644
# or not self._is_dbus_property(prop)
645
# or prop._dbus_name != property_name
646
# or (interface_name and prop._dbus_interface
647
# and interface_name != prop._dbus_interface)):
648
# continue
649
# return prop
650
# # No such property
651
# raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
# + interface_name + "."
653
# + property_name)
654
655
def _get_dbus_property(self, interface_name, property_name):
656
"""Returns a bound method if one exists which is a D-Bus
657
property with the specified name and interface.
658
"""
659
for name, value in inspect.getmembers(self, self._is_dbus_property):
660
if value._dbus_name == property_name and value._dbus_interface == interface_name:
661
return value
662
663
# No such property
664
raise DBusPropertyNotFound(self.dbus_object_path + ":"
665
+ interface_name + "."
666
+ property_name)
667
668
669
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
670
out_signature="v")
671
def Get(self, interface_name, property_name):
672
"""Standard D-Bus property Get() method, see D-Bus standard.
673
"""
674
prop = self._get_dbus_property(interface_name, property_name)
675
if prop._dbus_access == "write":
676
raise DBusPropertyAccessException(property_name)
677
value = prop()
678
if not hasattr(value, "variant_level"):
679
return value
680
return type(value)(value, variant_level=value.variant_level+1)
681
682
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
683
def Set(self, interface_name, property_name, value):
684
"""Standard D-Bus property Set() method, see D-Bus standard.
685
"""
686
prop = self._get_dbus_property(interface_name, property_name)
687
if prop._dbus_access == "read":
688
raise DBusPropertyAccessException(property_name)
689
if prop._dbus_get_args_options["byte_arrays"]:
690
# The byte_arrays option is not supported yet on
691
# signatures other than "ay".
692
if prop._dbus_signature != "ay":
693
raise ValueError
694
value = dbus.ByteArray(''.join(unichr(byte)
695
for byte in value))
696
prop(value)
697
698
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
699
out_signature="a{sv}")
700
def GetAll(self, interface_name):
701
"""Standard D-Bus property GetAll() method, see D-Bus
702
standard.
703
704
Note: Will not include properties with access="write".
705
"""
706
all = {}
707
for name, prop in self._get_all_dbus_properties():
708
if (interface_name
709
and interface_name != prop._dbus_interface):
710
# Interface non-empty but did not match
711
continue
712
# Ignore write-only properties
713
if prop._dbus_access == "write":
714
continue
715
value = prop()
716
if not hasattr(value, "variant_level"):
717
all[name] = value
718
continue
719
all[name] = type(value)(value, variant_level=
720
value.variant_level+1)
721
return dbus.Dictionary(all, signature="sv")
722
723
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
724
out_signature="s",
725
path_keyword='object_path',
726
connection_keyword='connection')
727
def Introspect(self, object_path, connection):
728
"""Standard D-Bus method, overloaded to insert property tags.
729
"""
730
xmlstring = dbus.service.Object.Introspect(self, object_path,
731
connection)
732
try:
733
document = xml.dom.minidom.parseString(xmlstring)
734
def make_tag(document, name, prop):
735
e = document.createElement("property")
736
e.setAttribute("name", name)
737
e.setAttribute("type", prop._dbus_signature)
738
e.setAttribute("access", prop._dbus_access)
739
return e
740
for if_tag in document.getElementsByTagName("interface"):
741
for tag in (make_tag(document, name, prop)
742
for name, prop
743
in self._get_all_dbus_properties()
744
if prop._dbus_interface
745
== if_tag.getAttribute("name")):
746
if_tag.appendChild(tag)
747
# Add the names to the return values for the
748
# "org.freedesktop.DBus.Properties" methods
749
if (if_tag.getAttribute("name")
750
== "org.freedesktop.DBus.Properties"):
751
for cn in if_tag.getElementsByTagName("method"):
752
if cn.getAttribute("name") == "Get":
753
for arg in cn.getElementsByTagName("arg"):
754
if (arg.getAttribute("direction")
755
== "out"):
756
arg.setAttribute("name", "value")
757
elif cn.getAttribute("name") == "GetAll":
758
for arg in cn.getElementsByTagName("arg"):
759
if (arg.getAttribute("direction")
760
== "out"):
761
arg.setAttribute("name", "props")
762
xmlstring = document.toxml("utf-8")
763
document.unlink()
764
except (AttributeError, xml.dom.DOMException,
765
xml.parsers.expat.ExpatError) as error:
766
logger.error("Failed to override Introspection method",
767
error)
768
return xmlstring
769
770
771
def datetime_to_dbus (dt, variant_level=0):
772
"""Convert a UTC datetime.datetime() to a D-Bus type."""
773
if dt is None:
774
return dbus.String("", variant_level = variant_level)
775
return dbus.String(dt.isoformat(),
776
variant_level=variant_level)
777
778
class transitional_clientdbus(DBusObjectWithProperties.__metaclass__):
779
def __new__(mcs, name, bases, attr):
780
for key, old_dbusobj in attr.items():
781
new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")
782
if getattr(old_dbusobj, "_dbus_is_signal", False):
783
unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,
784
old_dbusobj.__closure__))["func"].cell_contents
785
newfunc = types.FunctionType(unwrappedfunc.func_code,
786
unwrappedfunc.func_globals,
787
unwrappedfunc.func_name,
788
unwrappedfunc.func_defaults,
789
unwrappedfunc.func_closure)
790
new_dbusfunc = dbus.service.signal(
791
new_interface, old_dbusobj._dbus_signature)(newfunc)
792
attr["_transitional_{0}_1".format(key)] = new_dbusfunc
793
attr["_transitional_{0}_0".format(key)] = old_dbusobj
794
def fixscope(func1, func2):
795
def newcall(*args, **kwargs):
796
func1(*args, **kwargs)
797
func2(*args, **kwargs)
798
return newcall
799
800
attr[key] = fixscope(
801
old_dbusobj, attr["_transitional_{0}_1".format(key)])
802
803
if getattr(old_dbusobj, "_dbus_is_method", False):
804
new_dbusfunc = (dbus.service.method
805
(new_interface,
806
old_dbusobj._dbus_in_signature,
807
old_dbusobj._dbus_out_signature)
808
(types.FunctionType
809
(old_dbusobj.func_code,
810
old_dbusobj.func_globals,
811
old_dbusobj.func_name,
812
old_dbusobj.func_defaults,
813
old_dbusobj.func_closure)))
814
815
attr["_transitional_{0}".format(key)] = new_dbusfunc
816
if getattr(old_dbusobj, "_dbus_is_property", False):
817
new_dbusfunc = (dbus_service_property
818
(new_interface,
819
old_dbusobj._dbus_signature,
820
old_dbusobj._dbus_access,
821
old_dbusobj._dbus_get_args_options["byte_arrays"])
822
(types.FunctionType
823
(old_dbusobj.func_code,
824
old_dbusobj.func_globals,
825
old_dbusobj.func_name,
826
old_dbusobj.func_defaults,
827
old_dbusobj.func_closure)))
828
829
attr["_transitional_{0}".format(key)] = new_dbusfunc
830
return type.__new__(mcs, name, bases, attr)
831
832
class ClientDBus(Client, DBusObjectWithProperties):
833
"""A Client class using D-Bus
834
835
Attributes:
836
dbus_object_path: dbus.ObjectPath
837
bus: dbus.SystemBus()
838
"""
839
840
runtime_expansions = (Client.runtime_expansions
841
+ ("dbus_object_path",))
842
843
__metaclass__ = transitional_clientdbus
844
845
# dbus.service.Object doesn't use super(), so we can't either.
846
847
def __init__(self, bus = None, *args, **kwargs):
848
self._approvals_pending = 0
849
self.bus = bus
850
Client.__init__(self, *args, **kwargs)
851
# Only now, when this client is initialized, can it show up on
852
# the D-Bus
853
client_object_name = unicode(self.name).translate(
854
{ord("."): ord("_"),
855
ord("-"): ord("_")})
856
self.dbus_object_path = (dbus.ObjectPath
857
("/clients/" + client_object_name))
858
DBusObjectWithProperties.__init__(self, self.bus,
859
self.dbus_object_path)
860
861
def notifychangeproperty(transform_func,
862
dbus_name, type_func=lambda x: x,
863
variant_level=1):
864
""" Modify a variable so that its a property that announce its
865
changes to DBus.
866
transform_fun: Function that takes a value and transform it to
867
DBus type.
868
dbus_name: DBus name of the variable
869
type_func: Function that transform the value before sending it
870
to DBus
871
variant_level: DBus variant level. default: 1
872
"""
873
real_value = [None,]
874
def setter(self, value):
875
old_value = real_value[0]
876
real_value[0] = value
877
if hasattr(self, "dbus_object_path"):
878
if type_func(old_value) != type_func(real_value[0]):
879
dbus_value = transform_func(type_func(real_value[0]),
880
variant_level)
881
self.PropertyChanged(dbus.String(dbus_name),
882
dbus_value)
883
884
return property(lambda self: real_value[0], setter)
885
886
887
expires = notifychangeproperty(datetime_to_dbus, "Expires")
888
approvals_pending = notifychangeproperty(dbus.Boolean,
889
"ApprovalPending",
890
type_func = bool)
891
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
892
last_enabled = notifychangeproperty(datetime_to_dbus,
893
"LastEnabled")
894
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
895
type_func = lambda checker: checker is not None)
896
last_checked_ok = notifychangeproperty(datetime_to_dbus,
897
"LastCheckedOK")
898
last_approval_request = notifychangeproperty(datetime_to_dbus,
899
"LastApprovalRequest")
900
approved_by_default = notifychangeproperty(dbus.Boolean,
901
"ApprovedByDefault")
902
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
903
type_func = _timedelta_to_milliseconds)
904
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
905
type_func = _timedelta_to_milliseconds)
906
host = notifychangeproperty(dbus.String, "Host")
907
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
908
type_func = _timedelta_to_milliseconds)
909
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
910
type_func = _timedelta_to_milliseconds)
911
interval = notifychangeproperty(dbus.UInt16, "Interval",
912
type_func = _timedelta_to_milliseconds)
913
checker_command = notifychangeproperty(dbus.String, "Checker")
914
915
del notifychangeproperty
916
917
def __del__(self, *args, **kwargs):
918
try:
919
self.remove_from_connection()
920
except LookupError:
921
pass
922
if hasattr(DBusObjectWithProperties, "__del__"):
923
DBusObjectWithProperties.__del__(self, *args, **kwargs)
924
Client.__del__(self, *args, **kwargs)
925
926
def checker_callback(self, pid, condition, command,
927
*args, **kwargs):
928
self.checker_callback_tag = None
929
self.checker = None
930
if os.WIFEXITED(condition):
931
exitstatus = os.WEXITSTATUS(condition)
932
# Emit D-Bus signal
933
self.CheckerCompleted(dbus.Int16(exitstatus),
934
dbus.Int64(condition),
935
dbus.String(command))
936
else:
937
# Emit D-Bus signal
938
self.CheckerCompleted(dbus.Int16(-1),
939
dbus.Int64(condition),
940
dbus.String(command))
941
942
return Client.checker_callback(self, pid, condition, command,
943
*args, **kwargs)
944
945
def start_checker(self, *args, **kwargs):
946
old_checker = self.checker
947
if self.checker is not None:
948
old_checker_pid = self.checker.pid
949
else:
950
old_checker_pid = None
951
r = Client.start_checker(self, *args, **kwargs)
952
# Only if new checker process was started
953
if (self.checker is not None
954
and old_checker_pid != self.checker.pid):
955
# Emit D-Bus signal
956
self.CheckerStarted(self.current_checker_command)
957
return r
958
959
def _reset_approved(self):
960
self._approved = None
961
return False
962
963
def approve(self, value=True):
964
self.send_changedstate()
965
self._approved = value
966
gobject.timeout_add(_timedelta_to_milliseconds
967
(self.approval_duration),
968
self._reset_approved)
969
970
971
## D-Bus methods, signals & properties
972
_interface = "se.bsnet.fukt.Mandos.Client"
973
974
## Signals
975
976
# CheckerCompleted - signal
977
@dbus.service.signal(_interface, signature="nxs")
978
def CheckerCompleted(self, exitcode, waitstatus, command):
979
"D-Bus signal"
980
pass
981
982
# CheckerStarted - signal
983
@dbus.service.signal(_interface, signature="s")
984
def CheckerStarted(self, command):
985
"D-Bus signal"
986
pass
987
988
# PropertyChanged - signal
989
@dbus.service.signal(_interface, signature="sv")
990
def PropertyChanged(self, property, value):
991
"D-Bus signal"
992
pass
993
994
# GotSecret - signal
995
@dbus.service.signal(_interface)
996
def GotSecret(self):
997
"""D-Bus signal
998
Is sent after a successful transfer of secret from the Mandos
999
server to mandos-client
1000
"""
1001
pass
1002
1003
# Rejected - signal
1004
@dbus.service.signal(_interface, signature="s")
1005
def Rejected(self, reason):
1006
"D-Bus signal"
1007
pass
1008
1009
# NeedApproval - signal
1010
@dbus.service.signal(_interface, signature="tb")
1011
def NeedApproval(self, timeout, default):
1012
"D-Bus signal"
1013
return self.need_approval()
1014
1015
## Methods
1016
1017
# Approve - method
1018
@dbus.service.method(_interface, in_signature="b")
1019
def Approve(self, value):
1020
self.approve(value)
1021
1022
# CheckedOK - method
1023
@dbus.service.method(_interface)
1024
def CheckedOK(self):
1025
self.checked_ok()
1026
1027
# Enable - method
1028
@dbus.service.method(_interface)
1029
def Enable(self):
1030
"D-Bus method"
1031
self.enable()
1032
1033
# StartChecker - method
1034
@dbus.service.method(_interface)
1035
def StartChecker(self):
1036
"D-Bus method"
1037
self.start_checker()
1038
1039
# Disable - method
1040
@dbus.service.method(_interface)
1041
def Disable(self):
1042
"D-Bus method"
1043
self.disable()
1044
1045
# StopChecker - method
1046
@dbus.service.method(_interface)
1047
def StopChecker(self):
1048
self.stop_checker()
1049
1050
## Properties
1051
1052
# ApprovalPending - property
1053
@dbus_service_property(_interface, signature="b", access="read")
1054
def ApprovalPending_dbus_property(self):
1055
return dbus.Boolean(bool(self.approvals_pending))
1056
1057
# ApprovedByDefault - property
1058
@dbus_service_property(_interface, signature="b",
1059
access="readwrite")
1060
def ApprovedByDefault_dbus_property(self, value=None):
1061
if value is None: # get
1062
return dbus.Boolean(self.approved_by_default)
1063
self.approved_by_default = bool(value)
1064
1065
# ApprovalDelay - property
1066
@dbus_service_property(_interface, signature="t",
1067
access="readwrite")
1068
def ApprovalDelay_dbus_property(self, value=None):
1069
if value is None: # get
1070
return dbus.UInt64(self.approval_delay_milliseconds())
1071
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1072
1073
# ApprovalDuration - property
1074
@dbus_service_property(_interface, signature="t",
1075
access="readwrite")
1076
def ApprovalDuration_dbus_property(self, value=None):
1077
if value is None: # get
1078
return dbus.UInt64(_timedelta_to_milliseconds(
1079
self.approval_duration))
1080
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1081
1082
# Name - property
1083
@dbus_service_property(_interface, signature="s", access="read")
1084
def Name_dbus_property(self):
1085
return dbus.String(self.name)
1086
1087
# Fingerprint - property
1088
@dbus_service_property(_interface, signature="s", access="read")
1089
def Fingerprint_dbus_property(self):
1090
return dbus.String(self.fingerprint)
1091
1092
# Host - property
1093
@dbus_service_property(_interface, signature="s",
1094
access="readwrite")
1095
def Host_dbus_property(self, value=None):
1096
if value is None: # get
1097
return dbus.String(self.host)
1098
self.host = value
1099
1100
# Created - property
1101
@dbus_service_property(_interface, signature="s", access="read")
1102
def Created_dbus_property(self):
1103
return dbus.String(datetime_to_dbus(self.created))
1104
1105
# LastEnabled - property
1106
@dbus_service_property(_interface, signature="s", access="read")
1107
def LastEnabled_dbus_property(self):
1108
return datetime_to_dbus(self.last_enabled)
1109
1110
# Enabled - property
1111
@dbus_service_property(_interface, signature="b",
1112
access="readwrite")
1113
def Enabled_dbus_property(self, value=None):
1114
if value is None: # get
1115
return dbus.Boolean(self.enabled)
1116
if value:
1117
self.enable()
1118
else:
1119
self.disable()
1120
1121
# LastCheckedOK - property
1122
@dbus_service_property(_interface, signature="s",
1123
access="readwrite")
1124
def LastCheckedOK_dbus_property(self, value=None):
1125
if value is not None:
1126
self.checked_ok()
1127
return
1128
return datetime_to_dbus(self.last_checked_ok)
1129
1130
# Expires - property
1131
@dbus_service_property(_interface, signature="s", access="read")
1132
def Expires_dbus_property(self):
1133
return datetime_to_dbus(self.expires)
1134
1135
# LastApprovalRequest - property
1136
@dbus_service_property(_interface, signature="s", access="read")
1137
def LastApprovalRequest_dbus_property(self):
1138
return datetime_to_dbus(self.last_approval_request)
1139
1140
# Timeout - property
1141
@dbus_service_property(_interface, signature="t",
1142
access="readwrite")
1143
def Timeout_dbus_property(self, value=None):
1144
if value is None: # get
1145
return dbus.UInt64(self.timeout_milliseconds())
1146
self.timeout = datetime.timedelta(0, 0, 0, value)
1147
if getattr(self, "disable_initiator_tag", None) is None:
1148
return
1149
# Reschedule timeout
1150
gobject.source_remove(self.disable_initiator_tag)
1151
self.disable_initiator_tag = None
1152
self.expires = None
1153
time_to_die = (self.
1154
_timedelta_to_milliseconds((self
1155
.last_checked_ok
1156
+ self.timeout)
1157
- datetime.datetime
1158
.utcnow()))
1159
if time_to_die <= 0:
1160
# The timeout has passed
1161
self.disable()
1162
else:
1163
self.expires = (datetime.datetime.utcnow()
1164
+ datetime.timedelta(milliseconds = time_to_die))
1165
self.disable_initiator_tag = (gobject.timeout_add
1166
(time_to_die, self.disable))
1167
1168
# ExtendedTimeout - property
1169
@dbus_service_property(_interface, signature="t",
1170
access="readwrite")
1171
def ExtendedTimeout_dbus_property(self, value=None):
1172
if value is None: # get
1173
return dbus.UInt64(self.extended_timeout_milliseconds())
1174
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1175
1176
# Interval - property
1177
@dbus_service_property(_interface, signature="t",
1178
access="readwrite")
1179
def Interval_dbus_property(self, value=None):
1180
if value is None: # get
1181
return dbus.UInt64(self.interval_milliseconds())
1182
self.interval = datetime.timedelta(0, 0, 0, value)
1183
if getattr(self, "checker_initiator_tag", None) is None:
1184
return
1185
# Reschedule checker run
1186
gobject.source_remove(self.checker_initiator_tag)
1187
self.checker_initiator_tag = (gobject.timeout_add
1188
(value, self.start_checker))
1189
self.start_checker() # Start one now, too
1190
1191
# Checker - property
1192
@dbus_service_property(_interface, signature="s",
1193
access="readwrite")
1194
def Checker_dbus_property(self, value=None):
1195
if value is None: # get
1196
return dbus.String(self.checker_command)
1197
self.checker_command = value
1198
1199
# CheckerRunning - property
1200
@dbus_service_property(_interface, signature="b",
1201
access="readwrite")
1202
def CheckerRunning_dbus_property(self, value=None):
1203
if value is None: # get
1204
return dbus.Boolean(self.checker is not None)
1205
if value:
1206
self.start_checker()
1207
else:
1208
self.stop_checker()
1209
1210
# ObjectPath - property
1211
@dbus_service_property(_interface, signature="o", access="read")
1212
def ObjectPath_dbus_property(self):
1213
return self.dbus_object_path # is already a dbus.ObjectPath
1214
1215
# Secret = property
1216
@dbus_service_property(_interface, signature="ay",
1217
access="write", byte_arrays=True)
1218
def Secret_dbus_property(self, value):
1219
self.secret = str(value)
1220
1221
del _interface
1222
1223
1224
class ProxyClient(object):
1225
def __init__(self, child_pipe, fpr, address):
1226
self._pipe = child_pipe
1227
self._pipe.send(('init', fpr, address))
1228
if not self._pipe.recv():
1229
raise KeyError()
1230
1231
def __getattribute__(self, name):
1232
if(name == '_pipe'):
1233
return super(ProxyClient, self).__getattribute__(name)
1234
self._pipe.send(('getattr', name))
1235
data = self._pipe.recv()
1236
if data[0] == 'data':
1237
return data[1]
1238
if data[0] == 'function':
1239
def func(*args, **kwargs):
1240
self._pipe.send(('funcall', name, args, kwargs))
1241
return self._pipe.recv()[1]
1242
return func
1243
1244
def __setattr__(self, name, value):
1245
if(name == '_pipe'):
1246
return super(ProxyClient, self).__setattr__(name, value)
1247
self._pipe.send(('setattr', name, value))
1248
1249
1250
class ClientHandler(socketserver.BaseRequestHandler, object):
1251
"""A class to handle client connections.
1252
1253
Instantiated once for each connection to handle it.
307
def still_valid(self, now=None):
308
"""Has the timeout not yet passed for this client?"""
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
312
return now < (self.created + self.timeout)
313
else:
314
return now < (self.last_seen + self.timeout)
315
316
317
def peer_certificate(session):
318
"Return the peer's OpenPGP certificate as a bytestring"
319
# If not an OpenPGP certificate...
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
323
# ...do the normal thing
324
return session.peer_certificate
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
328
if list_size.value == 0:
329
return None
330
cert = cert_list[0]
331
return ctypes.string_at(cert.data, cert.size)
332
333
334
def fingerprint(openpgp):
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# New GnuTLS "datum" with the OpenPGP public key
341
datum = gnutls.library.types.gnutls_datum_t\
342
(ctypes.cast(ctypes.c_char_p(openpgp),
343
ctypes.POINTER(ctypes.c_ubyte)),
344
ctypes.c_uint(len(openpgp)))
345
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
350
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
353
# Get the fingerprint from the certificate into the buffer
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
356
# Deinit the certificate
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
360
# Convert the bytestring to hexadecimal notation
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
362
return hex_fpr
363
364
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
366
"""A TCP request handler class.
367
Instantiated by IPv6_TCPServer for each request to handle it.
1254
368
Note: This will run in its own forked process."""
1255
369
1256
370
def handle(self):
1257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1258
logger.info("TCP connection from: %s",
1259
unicode(self.client_address))
1260
logger.debug("Pipe FD: %d",
1261
self.server.child_pipe.fileno())
1262
1263
session = (gnutls.connection
1264
.ClientSession(self.request,
1265
gnutls.connection
1266
.X509Credentials()))
1267
1268
# Note: gnutls.connection.X509Credentials is really a
1269
# generic GnuTLS certificate credentials object so long as
1270
# no X.509 keys are added to it. Therefore, we can use it
1271
# here despite using OpenPGP certificates.
1272
1273
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1274
# "+AES-256-CBC", "+SHA1",
1275
# "+COMP-NULL", "+CTYPE-OPENPGP",
1276
# "+DHE-DSS"))
1277
# Use a fallback default, since this MUST be set.
1278
priority = self.server.gnutls_priority
1279
if priority is None:
1280
priority = "NORMAL"
1281
(gnutls.library.functions
1282
.gnutls_priority_set_direct(session._c_object,
1283
priority, None))
1284
1285
# Start communication using the Mandos protocol
1286
# Get protocol number
1287
line = self.request.makefile().readline()
1288
logger.debug("Protocol version: %r", line)
1289
try:
1290
if int(line.strip().split()[0]) > 1:
1291
raise RuntimeError
1292
except (ValueError, IndexError, RuntimeError) as error:
1293
logger.error("Unknown protocol version: %s", error)
1294
return
1295
1296
# Start GnuTLS connection
1297
try:
1298
session.handshake()
1299
except gnutls.errors.GNUTLSError as error:
1300
logger.warning("Handshake failed: %s", error)
1301
# Do not run session.bye() here: the session is not
1302
# established. Just abandon the request.
1303
return
1304
logger.debug("Handshake succeeded")
1305
1306
approval_required = False
1307
try:
1308
try:
1309
fpr = self.fingerprint(self.peer_certificate
1310
(session))
1311
except (TypeError,
1312
gnutls.errors.GNUTLSError) as error:
1313
logger.warning("Bad certificate: %s", error)
1314
return
1315
logger.debug("Fingerprint: %s", fpr)
1316
1317
try:
1318
client = ProxyClient(child_pipe, fpr,
1319
self.client_address)
1320
except KeyError:
1321
return
1322
1323
if client.approval_delay:
1324
delay = client.approval_delay
1325
client.approvals_pending += 1
1326
approval_required = True
1327
1328
while True:
1329
if not client.enabled:
1330
logger.info("Client %s is disabled",
1331
client.name)
1332
if self.server.use_dbus:
1333
# Emit D-Bus signal
1334
client.Rejected("Disabled")
1335
return
1336
1337
if client._approved or not client.approval_delay:
1338
#We are approved or approval is disabled
1339
break
1340
elif client._approved is None:
1341
logger.info("Client %s needs approval",
1342
client.name)
1343
if self.server.use_dbus:
1344
# Emit D-Bus signal
1345
client.NeedApproval(
1346
client.approval_delay_milliseconds(),
1347
client.approved_by_default)
1348
else:
1349
logger.warning("Client %s was not approved",
1350
client.name)
1351
if self.server.use_dbus:
1352
# Emit D-Bus signal
1353
client.Rejected("Denied")
1354
return
1355
1356
#wait until timeout or approved
1357
#x = float(client._timedelta_to_milliseconds(delay))
1358
time = datetime.datetime.now()
1359
client.changedstate.acquire()
1360
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1361
client.changedstate.release()
1362
time2 = datetime.datetime.now()
1363
if (time2 - time) >= delay:
1364
if not client.approved_by_default:
1365
logger.warning("Client %s timed out while"
1366
" waiting for approval",
1367
client.name)
1368
if self.server.use_dbus:
1369
# Emit D-Bus signal
1370
client.Rejected("Approval timed out")
1371
return
1372
else:
1373
break
1374
else:
1375
delay -= time2 - time
1376
1377
sent_size = 0
1378
while sent_size < len(client.secret):
1379
try:
1380
sent = session.send(client.secret[sent_size:])
1381
except gnutls.errors.GNUTLSError as error:
1382
logger.warning("gnutls send failed")
1383
return
1384
logger.debug("Sent: %d, remaining: %d",
1385
sent, len(client.secret)
1386
- (sent_size + sent))
1387
sent_size += sent
1388
1389
logger.info("Sending secret to %s", client.name)
1390
# bump the timeout as if seen
1391
client.checked_ok(client.extended_timeout)
1392
if self.server.use_dbus:
1393
# Emit D-Bus signal
1394
client.GotSecret()
1395
1396
finally:
1397
if approval_required:
1398
client.approvals_pending -= 1
1399
try:
1400
session.bye()
1401
except gnutls.errors.GNUTLSError as error:
1402
logger.warning("GnuTLS bye failed")
1403
1404
@staticmethod
1405
def peer_certificate(session):
1406
"Return the peer's OpenPGP certificate as a bytestring"
1407
# If not an OpenPGP certificate...
1408
if (gnutls.library.functions
1409
.gnutls_certificate_type_get(session._c_object)
1410
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1411
# ...do the normal thing
1412
return session.peer_certificate
1413
list_size = ctypes.c_uint(1)
1414
cert_list = (gnutls.library.functions
1415
.gnutls_certificate_get_peers
1416
(session._c_object, ctypes.byref(list_size)))
1417
if not bool(cert_list) and list_size.value != 0:
1418
raise gnutls.errors.GNUTLSError("error getting peer"
1419
" certificate")
1420
if list_size.value == 0:
1421
return None
1422
cert = cert_list[0]
1423
return ctypes.string_at(cert.data, cert.size)
1424
1425
@staticmethod
1426
def fingerprint(openpgp):
1427
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1428
# New GnuTLS "datum" with the OpenPGP public key
1429
datum = (gnutls.library.types
1430
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1431
ctypes.POINTER
1432
(ctypes.c_ubyte)),
1433
ctypes.c_uint(len(openpgp))))
1434
# New empty GnuTLS certificate
1435
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1436
(gnutls.library.functions
1437
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1438
# Import the OpenPGP public key into the certificate
1439
(gnutls.library.functions
1440
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1441
gnutls.library.constants
1442
.GNUTLS_OPENPGP_FMT_RAW))
1443
# Verify the self signature in the key
1444
crtverify = ctypes.c_uint()
1445
(gnutls.library.functions
1446
.gnutls_openpgp_crt_verify_self(crt, 0,
1447
ctypes.byref(crtverify)))
1448
if crtverify.value != 0:
1449
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1450
raise (gnutls.errors.CertificateSecurityError
1451
("Verify failed"))
1452
# New buffer for the fingerprint
1453
buf = ctypes.create_string_buffer(20)
1454
buf_len = ctypes.c_size_t()
1455
# Get the fingerprint from the certificate into the buffer
1456
(gnutls.library.functions
1457
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1458
ctypes.byref(buf_len)))
1459
# Deinit the certificate
1460
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1461
# Convert the buffer to a Python bytestring
1462
fpr = ctypes.string_at(buf, buf_len.value)
1463
# Convert the bytestring to hexadecimal notation
1464
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1465
return hex_fpr
1466
1467
1468
class MultiprocessingMixIn(object):
1469
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1470
def sub_process_main(self, request, address):
1471
try:
1472
self.finish_request(request, address)
1473
except:
1474
self.handle_error(request, address)
1475
self.close_request(request)
1476
1477
def process_request(self, request, address):
1478
"""Start a new process to process the request."""
1479
multiprocessing.Process(target = self.sub_process_main,
1480
args = (request, address)).start()
1481
1482
1483
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1484
""" adds a pipe to the MixIn """
1485
def process_request(self, request, client_address):
1486
"""Overrides and wraps the original process_request().
1487
1488
This function creates a new pipe in self.pipe
1489
"""
1490
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1491
1492
super(MultiprocessingMixInWithPipe,
1493
self).process_request(request, client_address)
1494
self.child_pipe.close()
1495
self.add_pipe(parent_pipe)
1496
1497
def add_pipe(self, parent_pipe):
1498
"""Dummy function; override as necessary"""
1499
raise NotImplementedError
1500
1501
1502
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1503
socketserver.TCPServer, object):
1504
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1505
371
logger.debug(u"TCP connection from: %s",
372
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
376
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
# "+DHE-DSS"))
380
priority = "SECURE256"
381
382
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
384
385
try:
386
session.handshake()
387
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
389
# Do not run session.bye() here: the session is not
390
# established. Just abandon the request.
391
return
392
try:
393
fpr = fingerprint(peer_certificate(session))
394
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
396
session.bye()
397
return
398
logger.debug(u"Fingerprint: %s", fpr)
399
client = None
400
for c in self.server.clients:
401
if c.fingerprint == fpr:
402
client = c
403
break
404
# Have to check if client.still_valid(), since it is possible
405
# that the client timed out while establishing the GnuTLS
406
# session.
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
414
session.bye()
415
return
416
sent_size = 0
417
while sent_size < len(client.secret):
418
sent = session.send(client.secret[sent_size:])
419
logger.debug(u"Sent: %d, remaining: %d",
420
sent, len(client.secret)
421
- (sent_size + sent))
422
sent_size += sent
423
session.bye()
424
425
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1506
428
Attributes:
1507
enabled: Boolean; whether this server is activated yet
1508
interface: None or a network interface name (string)
1509
use_ipv6: Boolean; to use IPv6 or not
429
options: Command line options
430
clients: Set() of Client objects
1510
431
"""
1511
def __init__(self, server_address, RequestHandlerClass,
1512
interface=None, use_ipv6=True):
1513
self.interface = interface
1514
if use_ipv6:
1515
self.address_family = socket.AF_INET6
1516
socketserver.TCPServer.__init__(self, server_address,
1517
RequestHandlerClass)
432
address_family = socket.AF_INET6
433
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
437
if "clients" in kwargs:
438
self.clients = kwargs["clients"]
439
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
1518
441
def server_bind(self):
1519
442
"""This overrides the normal server_bind() function
1520
443
to bind to an interface if one was specified, and also NOT to
1521
444
bind to an address or port if they were not specified."""
1522
if self.interface is not None:
1523
if SO_BINDTODEVICE is None:
1524
logger.error("SO_BINDTODEVICE does not exist;"
1525
" cannot bind to interface %s",
1526
self.interface)
1527
else:
1528
try:
1529
self.socket.setsockopt(socket.SOL_SOCKET,
1530
SO_BINDTODEVICE,
1531
str(self.interface
1532
+ '\0'))
1533
except socket.error as error:
1534
if error[0] == errno.EPERM:
1535
logger.error("No permission to"
1536
" bind to interface %s",
1537
self.interface)
1538
elif error[0] == errno.ENOPROTOOPT:
1539
logger.error("SO_BINDTODEVICE not available;"
1540
" cannot bind to interface %s",
1541
self.interface)
1542
else:
1543
raise
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
449
try:
450
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
453
except socket.error, error:
454
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
458
else:
459
raise error
1544
460
# Only bind(2) the socket if we really need to.
1545
461
if self.server_address[0] or self.server_address[1]:
1546
462
if not self.server_address[0]:
1547
if self.address_family == socket.AF_INET6:
1548
any_address = "::" # in6addr_any
1549
else:
1550
any_address = socket.INADDR_ANY
1551
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
1552
465
self.server_address[1])
1553
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
1554
467
self.server_address = (self.server_address[0],
1555
468
0)
1556
# if self.interface:
1557
# self.server_address = (self.server_address[0],
1558
# 0, # port
1559
# 0, # flowinfo
1560
# if_nametoindex
1561
# (self.interface))
1562
return socketserver.TCPServer.server_bind(self)
1563
1564
1565
class MandosServer(IPv6_TCPServer):
1566
"""Mandos server.
1567
1568
Attributes:
1569
clients: set of Client objects
1570
gnutls_priority GnuTLS priority string
1571
use_dbus: Boolean; to emit D-Bus signals or not
1572
1573
Assumes a gobject.MainLoop event loop.
1574
"""
1575
def __init__(self, server_address, RequestHandlerClass,
1576
interface=None, use_ipv6=True, clients=None,
1577
gnutls_priority=None, use_dbus=True):
1578
self.enabled = False
1579
self.clients = clients
1580
if self.clients is None:
1581
self.clients = set()
1582
self.use_dbus = use_dbus
1583
self.gnutls_priority = gnutls_priority
1584
IPv6_TCPServer.__init__(self, server_address,
1585
RequestHandlerClass,
1586
interface = interface,
1587
use_ipv6 = use_ipv6)
1588
def server_activate(self):
1589
if self.enabled:
1590
return socketserver.TCPServer.server_activate(self)
1591
def enable(self):
1592
self.enabled = True
1593
def add_pipe(self, parent_pipe):
1594
# Call "handle_ipc" for both data and EOF events
1595
gobject.io_add_watch(parent_pipe.fileno(),
1596
gobject.IO_IN | gobject.IO_HUP,
1597
functools.partial(self.handle_ipc,
1598
parent_pipe = parent_pipe))
1599
1600
def handle_ipc(self, source, condition, parent_pipe=None,
1601
client_object=None):
1602
condition_names = {
1603
gobject.IO_IN: "IN", # There is data to read.
1604
gobject.IO_OUT: "OUT", # Data can be written (without
1605
# blocking).
1606
gobject.IO_PRI: "PRI", # There is urgent data to read.
1607
gobject.IO_ERR: "ERR", # Error condition.
1608
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1609
# broken, usually for pipes and
1610
# sockets).
1611
}
1612
conditions_string = ' | '.join(name
1613
for cond, name in
1614
condition_names.iteritems()
1615
if cond & condition)
1616
# error or the other end of multiprocessing.Pipe has closed
1617
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1618
return False
1619
1620
# Read a request from the child
1621
request = parent_pipe.recv()
1622
command = request[0]
1623
1624
if command == 'init':
1625
fpr = request[1]
1626
address = request[2]
1627
1628
for c in self.clients:
1629
if c.fingerprint == fpr:
1630
client = c
1631
break
1632
else:
1633
logger.info("Client not found for fingerprint: %s, ad"
1634
"dress: %s", fpr, address)
1635
if self.use_dbus:
1636
# Emit D-Bus signal
1637
mandos_dbus_service.ClientNotFound(fpr, address[0])
1638
parent_pipe.send(False)
1639
return False
1640
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe = parent_pipe,
1645
client_object = client))
1646
parent_pipe.send(True)
1647
# remove the old hook in favor of the new above hook on same fileno
1648
return False
1649
if command == 'funcall':
1650
funcname = request[1]
1651
args = request[2]
1652
kwargs = request[3]
1653
1654
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1655
1656
if command == 'getattr':
1657
attrname = request[1]
1658
if callable(client_object.__getattribute__(attrname)):
1659
parent_pipe.send(('function',))
1660
else:
1661
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1662
1663
if command == 'setattr':
1664
attrname = request[1]
1665
value = request[2]
1666
setattr(client_object, attrname, value)
1667
1668
return True
469
return super(type(self), self).server_bind()
1669
470
1670
471
1671
472
def string_to_delta(interval):
1672
473
"""Parse a string and return a datetime.timedelta
1673
474
1674
475
>>> string_to_delta('7d')
1675
476
datetime.timedelta(7)
1676
477
>>> string_to_delta('60s')
1679
480
datetime.timedelta(0, 3600)
1680
481
>>> string_to_delta('24h')
1681
482
datetime.timedelta(1)
1682
>>> string_to_delta('1w')
483
>>> string_to_delta(u'1w')
1683
484
datetime.timedelta(7)
1684
>>> string_to_delta('5m 30s')
1685
datetime.timedelta(0, 330)
1686
485
"""
1687
timevalue = datetime.timedelta(0)
1688
for s in interval.split():
1689
try:
1690
suffix = unicode(s[-1])
1691
value = int(s[:-1])
1692
if suffix == "d":
1693
delta = datetime.timedelta(value)
1694
elif suffix == "s":
1695
delta = datetime.timedelta(0, value)
1696
elif suffix == "m":
1697
delta = datetime.timedelta(0, 0, 0, 0, value)
1698
elif suffix == "h":
1699
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1700
elif suffix == "w":
1701
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1702
else:
1703
raise ValueError("Unknown suffix %r" % suffix)
1704
except (ValueError, IndexError) as e:
1705
raise ValueError(*(e.args))
1706
timevalue += delta
1707
return timevalue
486
try:
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
489
if suffix == u"d":
490
delta = datetime.timedelta(value)
491
elif suffix == u"s":
492
delta = datetime.timedelta(0, value)
493
elif suffix == u"m":
494
delta = datetime.timedelta(0, 0, 0, 0, value)
495
elif suffix == u"h":
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
497
elif suffix == u"w":
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
499
else:
500
raise ValueError
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
539
def server_state_changed(state):
540
"""Derived from the Avahi example code"""
541
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
544
elif state == avahi.SERVER_RUNNING:
545
add_service()
546
547
548
def entry_group_state_changed(state, error):
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
553
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
556
elif state == avahi.ENTRY_GROUP_COLLISION:
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
570
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
1708
574
1709
575
1710
576
def if_nametoindex(interface):
1711
"""Call the C function if_nametoindex(), or equivalent
1712
1713
Note: This function cannot accept a unicode string."""
1714
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1715
578
try:
1716
if_nametoindex = (ctypes.cdll.LoadLibrary
1717
(ctypes.util.find_library("c"))
1718
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1719
581
except (OSError, AttributeError):
1720
logger.warning("Doing if_nametoindex the hard way")
1721
def if_nametoindex(interface):
1722
"Get an interface index the hard way, i.e. using fcntl()"
1723
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1724
with contextlib.closing(socket.socket()) as s:
1725
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1726
struct.pack(str("16s16x"),
1727
interface))
1728
interface_index = struct.unpack(str("I"),
1729
ifreq[16:20])[0]
1730
return interface_index
1731
return if_nametoindex(interface)
1732
1733
1734
def daemon(nochdir = False, noclose = False):
582
if "struct" not in sys.modules:
583
import struct
584
if "fcntl" not in sys.modules:
585
import fcntl
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
1735
596
"""See daemon(3). Standard BSD Unix function.
1736
1737
597
This should really exist as os.daemon, but it doesn't (yet)."""
1738
598
if os.fork():
1739
599
sys.exit()
1740
600
os.setsid()
1741
601
if not nochdir:
1742
602
os.chdir("/")
1743
if os.fork():
1744
sys.exit()
1745
603
if not noclose:
1746
604
# Close all standard open file descriptors
1747
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1748
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1749
607
raise OSError(errno.ENODEV,
1750
"%s not a character device"
1751
% os.path.devnull)
608
"/dev/null not a character device")
1752
609
os.dup2(null, sys.stdin.fileno())
1753
610
os.dup2(null, sys.stdout.fileno())
1754
611
os.dup2(null, sys.stderr.fileno())
1756
613
os.close(null)
1757
614
1758
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
1759
625
def main():
1760
1761
##################################################################
1762
# Parsing of options, both command line and config file
1763
1764
parser = argparse.ArgumentParser()
1765
parser.add_argument("-v", "--version", action="version",
1766
version = "%%(prog)s %s" % version,
1767
help="show version number and exit")
1768
parser.add_argument("-i", "--interface", metavar="IF",
1769
help="Bind to interface IF")
1770
parser.add_argument("-a", "--address",
1771
help="Address to listen for requests on")
1772
parser.add_argument("-p", "--port", type=int,
1773
help="Port number to receive requests on")
1774
parser.add_argument("--check", action="store_true",
1775
help="Run self-test")
1776
parser.add_argument("--debug", action="store_true",
1777
help="Debug mode; run in foreground and log"
1778
" to terminal")
1779
parser.add_argument("--debuglevel", metavar="LEVEL",
1780
help="Debug level for stdout output")
1781
parser.add_argument("--priority", help="GnuTLS"
1782
" priority string (see GnuTLS documentation)")
1783
parser.add_argument("--servicename",
1784
metavar="NAME", help="Zeroconf service name")
1785
parser.add_argument("--configdir",
1786
default="/etc/mandos", metavar="DIR",
1787
help="Directory to search for configuration"
1788
" files")
1789
parser.add_argument("--no-dbus", action="store_false",
1790
dest="use_dbus", help="Do not provide D-Bus"
1791
" system bus interface")
1792
parser.add_argument("--no-ipv6", action="store_false",
1793
dest="use_ipv6", help="Do not use IPv6")
1794
options = parser.parse_args()
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
632
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
636
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
645
parser.add_option("--check", action="store_true", default=False,
646
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
1795
650
1796
651
if options.check:
1797
652
import doctest
1798
653
doctest.testmod()
1799
654
sys.exit()
1800
655
1801
# Default values for config file for server-global settings
1802
server_defaults = { "interface": "",
1803
"address": "",
1804
"port": "",
1805
"debug": "False",
1806
"priority":
1807
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1808
"servicename": "Mandos",
1809
"use_dbus": "True",
1810
"use_ipv6": "True",
1811
"debuglevel": "",
1812
}
1813
1814
# Parse config file for server-global settings
1815
server_config = configparser.SafeConfigParser(server_defaults)
1816
del server_defaults
1817
server_config.read(os.path.join(options.configdir,
1818
"mandos.conf"))
1819
# Convert the SafeConfigParser object to a dict
1820
server_settings = server_config.defaults()
1821
# Use the appropriate methods on the non-string config options
1822
for option in ("debug", "use_dbus", "use_ipv6"):
1823
server_settings[option] = server_config.getboolean("DEFAULT",
1824
option)
1825
if server_settings["port"]:
1826
server_settings["port"] = server_config.getint("DEFAULT",
1827
"port")
1828
del server_config
1829
1830
# Override the settings from the config file with command line
1831
# options, if set.
1832
for option in ("interface", "address", "port", "debug",
1833
"priority", "servicename", "configdir",
1834
"use_dbus", "use_ipv6", "debuglevel"):
1835
value = getattr(options, option)
1836
if value is not None:
1837
server_settings[option] = value
1838
del options
1839
# Force all strings to be unicode
1840
for option in server_settings.keys():
1841
if type(server_settings[option]) is str:
1842
server_settings[option] = unicode(server_settings[option])
1843
# Now we have our good server settings in "server_settings"
1844
1845
##################################################################
1846
1847
# For convenience
1848
debug = server_settings["debug"]
1849
debuglevel = server_settings["debuglevel"]
1850
use_dbus = server_settings["use_dbus"]
1851
use_ipv6 = server_settings["use_ipv6"]
1852
1853
if server_settings["servicename"] != "Mandos":
1854
syslogger.setFormatter(logging.Formatter
1855
('Mandos (%s) [%%(process)d]:'
1856
' %%(levelname)s: %%(message)s'
1857
% server_settings["servicename"]))
1858
1859
# Parse config file with clients
1860
client_defaults = { "timeout": "5m",
1861
"extended_timeout": "15m",
1862
"interval": "2m",
1863
"checker": "fping -q -- %%(host)s",
1864
"host": "",
1865
"approval_delay": "0s",
1866
"approval_duration": "1s",
1867
}
1868
client_config = configparser.SafeConfigParser(client_defaults)
1869
client_config.read(os.path.join(server_settings["configdir"],
1870
"clients.conf"))
1871
1872
global mandos_dbus_service
1873
mandos_dbus_service = None
1874
1875
tcp_server = MandosServer((server_settings["address"],
1876
server_settings["port"]),
1877
ClientHandler,
1878
interface=(server_settings["interface"]
1879
or None),
1880
use_ipv6=use_ipv6,
1881
gnutls_priority=
1882
server_settings["priority"],
1883
use_dbus=use_dbus)
1884
if not debug:
1885
pidfilename = "/var/run/mandos.pid"
1886
try:
1887
pidfile = open(pidfilename, "w")
1888
except IOError:
1889
logger.error("Could not open file %r", pidfilename)
1890
1891
try:
1892
uid = pwd.getpwnam("_mandos").pw_uid
1893
gid = pwd.getpwnam("_mandos").pw_gid
1894
except KeyError:
1895
try:
1896
uid = pwd.getpwnam("mandos").pw_uid
1897
gid = pwd.getpwnam("mandos").pw_gid
1898
except KeyError:
1899
try:
1900
uid = pwd.getpwnam("nobody").pw_uid
1901
gid = pwd.getpwnam("nobody").pw_gid
1902
except KeyError:
1903
uid = 65534
1904
gid = 65534
1905
try:
1906
os.setgid(gid)
1907
os.setuid(uid)
1908
except OSError as error:
1909
if error[0] != errno.EPERM:
1910
raise error
1911
1912
if not debug and not debuglevel:
1913
syslogger.setLevel(logging.WARNING)
1914
console.setLevel(logging.WARNING)
1915
if debuglevel:
1916
level = getattr(logging, debuglevel.upper())
1917
syslogger.setLevel(level)
1918
console.setLevel(level)
1919
1920
if debug:
1921
# Enable all possible GnuTLS debugging
1922
1923
# "Use a log level over 10 to enable all debugging options."
1924
# - GnuTLS manual
1925
gnutls.library.functions.gnutls_global_set_log_level(11)
1926
1927
@gnutls.library.types.gnutls_log_func
1928
def debug_gnutls(level, string):
1929
logger.debug("GnuTLS: %s", string[:-1])
1930
1931
(gnutls.library.functions
1932
.gnutls_global_set_log_function(debug_gnutls))
1933
1934
# Redirect stdin so all checkers get /dev/null
1935
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1936
os.dup2(null, sys.stdin.fileno())
1937
if null > 2:
1938
os.close(null)
1939
else:
1940
# No console logging
1941
logger.removeHandler(console)
1942
1943
# Need to fork before connecting to D-Bus
1944
if not debug:
1945
# Close all input and output, do double fork, etc.
1946
daemon()
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
1947
671
1948
672
global main_loop
673
global bus
674
global server
1949
675
# From the Avahi example code
1950
676
DBusGMainLoop(set_as_default=True )
1951
677
main_loop = gobject.MainLoop()
1952
678
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1953
682
# End of Avahi example code
1954
if use_dbus:
1955
try:
1956
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1957
bus, do_not_queue=True)
1958
bus_name2 = dbus.service.BusName("se.recompile.Mandos",
1959
bus, do_not_queue=True)
1960
except dbus.exceptions.NameExistsException as e:
1961
logger.error(unicode(e) + ", disabling D-Bus")
1962
use_dbus = False
1963
server_settings["use_dbus"] = False
1964
tcp_server.use_dbus = False
1965
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1966
service = AvahiService(name = server_settings["servicename"],
1967
servicetype = "_mandos._tcp",
1968
protocol = protocol, bus = bus)
1969
if server_settings["interface"]:
1970
service.interface = (if_nametoindex
1971
(str(server_settings["interface"])))
1972
1973
global multiprocessing_manager
1974
multiprocessing_manager = multiprocessing.Manager()
1975
1976
client_class = Client
1977
if use_dbus:
1978
client_class = functools.partial(ClientDBus, bus = bus)
1979
def client_config_items(config, section):
1980
special_settings = {
1981
"approved_by_default":
1982
lambda: config.getboolean(section,
1983
"approved_by_default"),
1984
}
1985
for name, value in config.items(section):
1986
try:
1987
yield (name, special_settings[name]())
1988
except KeyError:
1989
yield (name, value)
1990
1991
tcp_server.clients.update(set(
1992
client_class(name = section,
1993
config= dict(client_config_items(
1994
client_config, section)))
1995
for section in client_config.sections()))
1996
if not tcp_server.clients:
1997
logger.warning("No clients defined")
1998
683
684
debug = options.debug
685
686
if debug:
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
692
del console
693
694
clients = Set()
695
def remove_from_clients(client):
696
clients.remove(client)
697
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
700
701
clients.update(Set(Client(name=section, options=options,
702
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
705
for section in client_config.sections()))
706
1999
707
if not debug:
2000
try:
2001
with pidfile:
2002
pid = os.getpid()
2003
pidfile.write(str(pid) + "\n".encode("utf-8"))
2004
del pidfile
2005
except IOError:
2006
logger.error("Could not write to file %r with PID %d",
2007
pidfilename, pid)
2008
except NameError:
2009
# "pidfile" was never created
2010
pass
2011
del pidfilename
2012
2013
signal.signal(signal.SIGINT, signal.SIG_IGN)
2014
2015
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2016
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2017
2018
if use_dbus:
2019
class MandosDBusService(dbus.service.Object):
2020
"""A D-Bus proxy object"""
2021
def __init__(self):
2022
dbus.service.Object.__init__(self, bus, "/")
2023
_interface = "se.bsnet.fukt.Mandos"
2024
2025
@dbus.service.signal(_interface, signature="o")
2026
def ClientAdded(self, objpath):
2027
"D-Bus signal"
2028
pass
2029
2030
@dbus.service.signal(_interface, signature="ss")
2031
def ClientNotFound(self, fingerprint, address):
2032
"D-Bus signal"
2033
pass
2034
2035
@dbus.service.signal(_interface, signature="os")
2036
def ClientRemoved(self, objpath, name):
2037
"D-Bus signal"
2038
pass
2039
2040
@dbus.service.method(_interface, out_signature="ao")
2041
def GetAllClients(self):
2042
"D-Bus method"
2043
return dbus.Array(c.dbus_object_path
2044
for c in tcp_server.clients)
2045
2046
@dbus.service.method(_interface,
2047
out_signature="a{oa{sv}}")
2048
def GetAllClientsWithProperties(self):
2049
"D-Bus method"
2050
return dbus.Dictionary(
2051
((c.dbus_object_path, c.GetAll(""))
2052
for c in tcp_server.clients),
2053
signature="oa{sv}")
2054
2055
@dbus.service.method(_interface, in_signature="o")
2056
def RemoveClient(self, object_path):
2057
"D-Bus method"
2058
for c in tcp_server.clients:
2059
if c.dbus_object_path == object_path:
2060
tcp_server.clients.remove(c)
2061
c.remove_from_connection()
2062
# Don't signal anything except ClientRemoved
2063
c.disable(quiet=True)
2064
# Emit D-Bus signal
2065
self.ClientRemoved(object_path, c.name)
2066
return
2067
raise KeyError(object_path)
2068
2069
del _interface
2070
2071
mandos_dbus_service = MandosDBusService()
708
daemon(False, False)
2072
709
2073
710
def cleanup():
2074
711
"Cleanup function; run on exit"
2075
service.cleanup()
2076
2077
while tcp_server.clients:
2078
client = tcp_server.clients.pop()
2079
if use_dbus:
2080
client.remove_from_connection()
2081
client.disable_hook = None
2082
# Don't signal anything except ClientRemoved
2083
client.disable(quiet=True)
2084
if use_dbus:
2085
# Emit D-Bus signal
2086
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2087
client.name)
2088
2089
atexit.register(cleanup)
2090
2091
for client in tcp_server.clients:
2092
if use_dbus:
2093
# Emit D-Bus signal
2094
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2095
client.enable()
2096
2097
tcp_server.enable()
2098
tcp_server.server_activate()
2099
2100
# Find out what port we got
2101
service.port = tcp_server.socket.getsockname()[1]
2102
if use_ipv6:
2103
logger.info("Now listening on address %r, port %d,"
2104
" flowinfo %d, scope_id %d"
2105
% tcp_server.socket.getsockname())
2106
else: # IPv4
2107
logger.info("Now listening on address %r, port %d"
2108
% tcp_server.socket.getsockname())
2109
2110
#service.interface = tcp_server.socket.getsockname()[3]
2111
2112
try:
712
global group
2113
713
# From the Avahi example code
2114
try:
2115
service.activate()
2116
except dbus.exceptions.DBusException as error:
2117
logger.critical("DBusException: %s", error)
2118
cleanup()
2119
sys.exit(1)
714
if not group is None:
715
group.Free()
716
group = None
2120
717
# End of Avahi example code
2121
718
2122
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2123
lambda *args, **kwargs:
2124
(tcp_server.handle_request
2125
(*args[2:], **kwargs) or True))
2126
719
while clients:
720
client = clients.pop()
721
client.stop_hook = None
722
client.stop()
723
724
atexit.register(cleanup)
725
726
if not debug:
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
730
731
for client in clients:
732
client.start()
733
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
2127
761
logger.debug("Starting main loop")
762
main_loop_started = True
2128
763
main_loop.run()
2129
except AvahiError as error:
2130
logger.critical("AvahiError: %s", error)
2131
cleanup()
2132
sys.exit(1)
2133
764
except KeyboardInterrupt:
2134
765
if debug:
2135
print("", file=sys.stderr)
2136
logger.debug("Server received KeyboardInterrupt")
2137
logger.debug("Server exiting")
2138
# Must run before the D-Bus bus name gets deregistered
2139
cleanup()
2140
766
print
767
768
sys.exit(exitstatus)
2141
769
2142
770
if __name__ == '__main__':
2143
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0