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- Committer: Teddy Hogeborn
- Date: 2014-02-16 14:22:03 UTC
- Revision ID: teddy@recompile.se-20140216142203-48mkrnoin5bly7l2
* mandos.lsm: Fix formatting to be acceptable by the LSM Robot.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program. If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
31
32
#
32
33
33
from __future__ import division
34
35
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
36
40
import socket
37
import select
38
from optparse import OptionParser
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
import ConfigParser
50
import ConfigParser as configparser
48
51
import sys
49
52
import re
50
53
import os
51
54
import signal
52
from sets import Set
53
55
import subprocess
54
56
import atexit
55
57
import stat
56
58
import logging
57
59
import logging.handlers
60
import pwd
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
58
72
59
73
import dbus
74
import dbus.service
60
75
import gobject
61
76
import avahi
62
77
from dbus.mainloop.glib import DBusGMainLoop
63
78
import ctypes
64
65
version = "1.0"
66
67
logger = logging.Logger('mandos')
68
syslogger = logging.handlers.SysLogHandler\
69
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
70
address = "/dev/log")
71
syslogger.setFormatter(logging.Formatter\
72
('Mandos: %(levelname)s: %(message)s'))
73
logger.addHandler(syslogger)
74
75
console = logging.StreamHandler()
76
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(console)
79
import ctypes.util
80
import xml.dom.minidom
81
import inspect
82
83
try:
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
except AttributeError:
86
try:
87
from IN import SO_BINDTODEVICE
88
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.6.4"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger = (logging.handlers.SysLogHandler
118
(facility =
119
logging.handlers.SysLogHandler.LOG_DAEMON,
120
address = str("/dev/log")))
121
syslogger.setFormatter(logging.Formatter
122
('Mandos [%(process)d]: %(levelname)s:'
123
' %(message)s'))
124
logger.addHandler(syslogger)
125
126
if debug:
127
console = logging.StreamHandler()
128
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
' [%(process)d]:'
130
' %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(console)
133
logger.setLevel(level)
134
135
136
class PGPError(Exception):
137
"""Exception if encryption/decryption fails"""
138
pass
139
140
141
class PGPEngine(object):
142
"""A simple class for OpenPGP symmetric encryption & decryption"""
143
def __init__(self):
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupgargs = ['--batch',
146
'--home', self.tempdir,
147
'--force-mdc',
148
'--quiet',
149
'--no-use-agent']
150
151
def __enter__(self):
152
return self
153
154
def __exit__(self, exc_type, exc_value, traceback):
155
self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
161
def _cleanup(self):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
166
for filename in files:
167
os.remove(os.path.join(root, filename))
168
for dirname in dirs:
169
os.rmdir(os.path.join(root, dirname))
170
# Remove tempdir
171
os.rmdir(self.tempdir)
172
self.tempdir = None
173
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
184
185
def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
193
passfile.name]
194
+ self.gnupgargs,
195
stdin = subprocess.PIPE,
196
stdout = subprocess.PIPE,
197
stderr = subprocess.PIPE)
198
ciphertext, err = proc.communicate(input = data)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
202
203
def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
211
passfile.name]
212
+ self.gnupgargs,
213
stdin = subprocess.PIPE,
214
stdout = subprocess.PIPE,
215
stderr = subprocess.PIPE)
216
decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
221
79
222
80
223
class AvahiError(Exception):
81
def __init__(self, value):
224
def __init__(self, value, *args, **kwargs):
82
225
self.value = value
83
def __str__(self):
84
return repr(self.value)
226
super(AvahiError, self).__init__(value, *args, **kwargs)
227
def __unicode__(self):
228
return unicode(repr(self.value))
85
229
86
230
class AvahiServiceError(AvahiError):
87
231
pass
92
236
93
237
class AvahiService(object):
94
238
"""An Avahi (Zeroconf) service.
239
95
240
Attributes:
96
241
interface: integer; avahi.IF_UNSPEC or an interface index.
97
242
Used to optionally bind to the specified interface.
98
243
name: string; Example: 'Mandos'
99
244
type: string; Example: '_mandos._tcp'.
100
See <http://www.dns-sd.org/ServiceTypes.html>
245
See <https://www.iana.org/assignments/service-names-port-numbers>
101
246
port: integer; what port to announce
102
247
TXT: list of strings; TXT record for the service
103
248
domain: string; Domain to publish on, default to .local if empty.
105
250
max_renames: integer; maximum number of renames
106
251
rename_count: integer; counter so we only rename after collisions
107
252
a sensible number of times
253
group: D-Bus Entry Group
254
server: D-Bus Server
255
bus: dbus.SystemBus()
108
256
"""
257
109
258
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
110
type = None, port = None, TXT = None, domain = "",
111
host = "", max_renames = 32768):
259
servicetype = None, port = None, TXT = None,
260
domain = "", host = "", max_renames = 32768,
261
protocol = avahi.PROTO_UNSPEC, bus = None):
112
262
self.interface = interface
113
263
self.name = name
114
self.type = type
264
self.type = servicetype
115
265
self.port = port
116
if TXT is None:
117
self.TXT = []
118
else:
119
self.TXT = TXT
266
self.TXT = TXT if TXT is not None else []
120
267
self.domain = domain
121
268
self.host = host
122
269
self.rename_count = 0
123
270
self.max_renames = max_renames
271
self.protocol = protocol
272
self.group = None # our entry group
273
self.server = None
274
self.bus = bus
275
self.entry_group_state_changed_match = None
276
124
277
def rename(self):
125
278
"""Derived from the Avahi example code"""
126
279
if self.rename_count >= self.max_renames:
127
logger.critical(u"No suitable Zeroconf service name found"
128
u" after %i retries, exiting.",
129
rename_count)
280
logger.critical("No suitable Zeroconf service name found"
281
" after %i retries, exiting.",
282
self.rename_count)
130
283
raise AvahiServiceError("Too many renames")
131
self.name = server.GetAlternativeServiceName(self.name)
132
logger.info(u"Changing Zeroconf service name to %r ...",
133
str(self.name))
134
syslogger.setFormatter(logging.Formatter\
135
('Mandos (%s): %%(levelname)s:'
136
' %%(message)s' % self.name))
284
self.name = unicode(self.server
285
.GetAlternativeServiceName(self.name))
286
logger.info("Changing Zeroconf service name to %r ...",
287
self.name)
137
288
self.remove()
138
self.add()
289
try:
290
self.add()
291
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
293
self.cleanup()
294
os._exit(1)
139
295
self.rename_count += 1
296
140
297
def remove(self):
141
298
"""Derived from the Avahi example code"""
142
if group is not None:
143
group.Reset()
299
if self.entry_group_state_changed_match is not None:
300
self.entry_group_state_changed_match.remove()
301
self.entry_group_state_changed_match = None
302
if self.group is not None:
303
self.group.Reset()
304
144
305
def add(self):
145
306
"""Derived from the Avahi example code"""
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
307
self.remove()
308
if self.group is None:
309
self.group = dbus.Interface(
310
self.bus.get_object(avahi.DBUS_NAME,
311
self.server.EntryGroupNew()),
312
avahi.DBUS_INTERFACE_ENTRY_GROUP)
313
self.entry_group_state_changed_match = (
314
self.group.connect_to_signal(
315
'StateChanged', self.entry_group_state_changed))
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
317
self.name, self.type)
318
self.group.AddService(
319
self.interface,
320
self.protocol,
321
dbus.UInt32(0), # flags
322
self.name, self.type,
323
self.domain, self.host,
324
dbus.UInt16(self.port),
325
avahi.string_array_to_txt_array(self.TXT))
326
self.group.Commit()
327
328
def entry_group_state_changed(self, state, error):
329
"""Derived from the Avahi example code"""
330
logger.debug("Avahi entry group state change: %i", state)
331
332
if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
logger.debug("Zeroconf service established.")
334
elif state == avahi.ENTRY_GROUP_COLLISION:
335
logger.info("Zeroconf service name collision.")
336
self.rename()
337
elif state == avahi.ENTRY_GROUP_FAILURE:
338
logger.critical("Avahi: Error in group state changed %s",
339
unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
343
def cleanup(self):
344
"""Derived from the Avahi example code"""
345
if self.group is not None:
346
try:
347
self.group.Free()
348
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
350
pass
351
self.group = None
352
self.remove()
353
354
def server_state_changed(self, state, error=None):
355
"""Derived from the Avahi example code"""
356
logger.debug("Avahi server state change: %i", state)
357
bad_states = { avahi.SERVER_INVALID:
358
"Zeroconf server invalid",
359
avahi.SERVER_REGISTERING: None,
360
avahi.SERVER_COLLISION:
361
"Zeroconf server name collision",
362
avahi.SERVER_FAILURE:
363
"Zeroconf server failure" }
364
if state in bad_states:
365
if bad_states[state] is not None:
366
if error is None:
367
logger.error(bad_states[state])
368
else:
369
logger.error(bad_states[state] + ": %r", error)
370
self.cleanup()
371
elif state == avahi.SERVER_RUNNING:
372
self.add()
373
else:
374
if error is None:
375
logger.debug("Unknown state: %r", state)
376
else:
377
logger.debug("Unknown state: %r: %r", state, error)
378
379
def activate(self):
380
"""Derived from the Avahi example code"""
381
if self.server is None:
382
self.server = dbus.Interface(
383
self.bus.get_object(avahi.DBUS_NAME,
384
avahi.DBUS_PATH_SERVER,
385
follow_name_owner_changes=True),
386
avahi.DBUS_INTERFACE_SERVER)
387
self.server.connect_to_signal("StateChanged",
388
self.server_state_changed)
389
self.server_state_changed(self.server.GetState())
390
391
392
class AvahiServiceToSyslog(AvahiService):
393
def rename(self):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
400
return ret
401
402
403
def timedelta_to_milliseconds(td):
404
"Convert a datetime.timedelta() to milliseconds"
405
return ((td.days * 24 * 60 * 60 * 1000)
406
+ (td.seconds * 1000)
407
+ (td.microseconds // 1000))
169
408
170
409
171
410
class Client(object):
172
411
"""A representation of a client host served by this server.
412
173
413
Attributes:
174
name: string; from the config file, used in log messages
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
423
runtime with vars(self) as dict, so that for
424
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
175
432
fingerprint: string (40 or 32 hexadecimal digits); used to
176
433
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
host: string; available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
193
runtime with vars(self) as dict, so that for
194
instance %(name)s can be used in the command.
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
200
452
"""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name = None, stop_hook=None, config={}):
225
"""Note: the 'checker' key in 'config' sets the
226
'checker_command' attribute and *not* the 'checker'
227
attribute."""
453
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
470
def timeout_milliseconds(self):
471
"Return the 'timeout' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.timeout)
473
474
def extended_timeout_milliseconds(self):
475
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
477
478
def interval_milliseconds(self):
479
"Return the 'interval' attribute in milliseconds"
480
return timedelta_to_milliseconds(self.interval)
481
482
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
228
533
self.name = name
229
logger.debug(u"Creating client %r", self.name)
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
551
logger.debug("Creating client %r", self.name)
230
552
# Uppercase and remove spaces from fingerprint for later
231
553
# comparison purposes with return value from the fingerprint()
232
554
# function
233
self.fingerprint = config["fingerprint"].upper()\
234
.replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
sf = open(config["secfile"])
240
self.secret = sf.read()
241
sf.close()
242
else:
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.host = config.get("host", "")
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(config["timeout"])
249
self.interval = string_to_delta(config["interval"])
250
self.stop_hook = stop_hook
555
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# attributes specific for this server instance
251
560
self.checker = None
252
561
self.checker_initiator_tag = None
253
self.stop_initiator_tag = None
562
self.disable_initiator_tag = None
254
563
self.checker_callback_tag = None
255
self.check_command = config["checker"]
256
def start(self):
564
self.current_checker_command = None
565
self.approved = None
566
self.approvals_pending = 0
567
self.changedstate = (multiprocessing_manager
568
.Condition(multiprocessing_manager
569
.Lock()))
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
573
self.client_structure.append("client_structure")
574
575
for name, t in inspect.getmembers(type(self),
576
lambda obj:
577
isinstance(obj,
578
property)):
579
if not name.startswith("_"):
580
self.client_structure.append(name)
581
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
586
587
def enable(self):
257
588
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
590
# Already enabled
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
594
self.last_enabled = datetime.datetime.utcnow()
595
self.init_checker()
596
self.send_changedstate()
597
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
601
return False
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
611
self.stop_checker()
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
616
return False
617
618
def __del__(self):
619
self.disable()
620
621
def init_checker(self):
258
622
# Schedule a new checker to be started an 'interval' from now,
259
623
# and every interval from then on.
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
self.checker_initiator_tag = (gobject.timeout_add
627
(self.interval_milliseconds(),
628
self.start_checker))
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
self.disable_initiator_tag = (gobject.timeout_add
633
(self.timeout_milliseconds(),
634
self.disable))
263
635
# Also start a new checker *right now*.
264
636
self.start_checker()
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if hasattr(self, "secret") and self.secret:
275
logger.info(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
285
self.stop_checker()
286
if self.stop_hook:
287
self.stop_hook(self)
288
# Do not run this again if called by a gobject.timeout_add
289
return False
290
def __del__(self):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
637
638
def checker_callback(self, pid, condition, command):
294
639
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
296
640
self.checker_callback_tag = None
297
641
self.checker = None
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.info(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
642
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
646
vars(self))
647
self.checked_ok()
648
else:
649
logger.info("Checker for %(name)s failed",
650
vars(self))
651
else:
652
self.last_checker_status = -1
653
logger.warning("Checker for %(name)s crashed?",
309
654
vars(self))
310
else:
311
logger.info(u"Checker for %(name)s failed",
312
vars(self))
655
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
664
if timeout is None:
665
timeout = self.timeout
666
if self.disable_initiator_tag is not None:
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
if getattr(self, "enabled", False):
670
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
672
(timeout), self.disable))
673
self.expires = datetime.datetime.utcnow() + timeout
674
675
def need_approval(self):
676
self.last_approval_request = datetime.datetime.utcnow()
677
313
678
def start_checker(self):
314
679
"""Start a new checker subprocess if one is not running.
680
315
681
If a checker already exists, leave it running and do
316
682
nothing."""
317
683
# The reason for not killing a running checker is that if we
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
322
688
# checkers alone, the checker would have to take more time
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
689
# than 'timeout' for the client to be disabled, which is as it
690
# should be.
691
692
# If a checker exists, make sure it is not a zombie
693
try:
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
700
else:
701
if pid:
702
logger.warning("Checker was a zombie")
703
gobject.source_remove(self.checker_callback_tag)
704
self.checker_callback(pid, status,
705
self.current_checker_command)
706
# Start a new checker if needed
325
707
if self.checker is None:
326
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.host
329
except TypeError:
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
334
try:
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
340
try:
341
logger.info(u"Starting checker %r for %s",
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
713
try:
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
719
self.current_checker_command = command
720
try:
721
logger.info("Starting checker %r for %s",
342
722
command, self.name)
343
723
# We don't need to redirect stdout and stderr, since
344
724
# in normal mode, that is already done by daemon(),
345
725
# and in debug mode we don't want to. (Stdin is
346
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
347
735
self.checker = subprocess.Popen(command,
348
736
close_fds=True,
349
shell=True, cwd="/")
350
self.checker_callback_tag = gobject.child_watch_add\
351
(self.checker.pid,
352
self.checker_callback)
353
except OSError, error:
354
logger.error(u"Failed to start subprocess: %s",
355
error)
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
356
761
# Re-run this periodically if run by gobject.timeout_add
357
762
return True
763
358
764
def stop_checker(self):
359
765
"""Force the checker process, if any, to stop."""
360
766
if self.checker_callback_tag:
362
768
self.checker_callback_tag = None
363
769
if getattr(self, "checker", None) is None:
364
770
return
365
logger.debug(u"Stopping checker for %(name)s", vars(self))
771
logger.debug("Stopping checker for %(name)s", vars(self))
366
772
try:
367
os.kill(self.checker.pid, signal.SIGTERM)
368
#os.sleep(0.5)
773
self.checker.terminate()
774
#time.sleep(0.5)
369
775
#if self.checker.poll() is None:
370
# os.kill(self.checker.pid, signal.SIGKILL)
371
except OSError, error:
776
# self.checker.kill()
777
except OSError as error:
372
778
if error.errno != errno.ESRCH: # No such process
373
779
raise
374
780
self.checker = None
375
def still_valid(self):
376
"""Has the timeout not yet passed for this client?"""
377
now = datetime.datetime.now()
378
if self.last_checked_ok is None:
379
return now < (self.created + self.timeout)
380
else:
381
return now < (self.last_checked_ok + self.timeout)
382
383
384
def peer_certificate(session):
385
"Return the peer's OpenPGP certificate as a bytestring"
386
# If not an OpenPGP certificate...
387
if gnutls.library.functions.gnutls_certificate_type_get\
388
(session._c_object) \
389
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
390
# ...do the normal thing
391
return session.peer_certificate
392
list_size = ctypes.c_uint()
393
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
394
(session._c_object, ctypes.byref(list_size))
395
if list_size.value == 0:
396
return None
397
cert = cert_list[0]
398
return ctypes.string_at(cert.data, cert.size)
399
400
401
def fingerprint(openpgp):
402
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# New empty GnuTLS certificate
409
crt = gnutls.library.types.gnutls_openpgp_crt_t()
410
gnutls.library.functions.gnutls_openpgp_crt_init\
411
(ctypes.byref(crt))
412
# Import the OpenPGP public key into the certificate
413
gnutls.library.functions.gnutls_openpgp_crt_import\
414
(crt, ctypes.byref(datum),
415
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
416
# Verify the self signature in the key
417
crtverify = ctypes.c_uint();
418
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
419
(crt, 0, ctypes.byref(crtverify))
420
if crtverify.value != 0:
421
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
raise gnutls.errors.CertificateSecurityError("Verify failed")
423
# New buffer for the fingerprint
424
buffer = ctypes.create_string_buffer(20)
425
buffer_length = ctypes.c_size_t()
426
# Get the fingerprint from the certificate into the buffer
427
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
428
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
429
# Deinit the certificate
430
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
431
# Convert the buffer to a Python bytestring
432
fpr = ctypes.string_at(buffer, buffer_length.value)
433
# Convert the bytestring to hexadecimal notation
434
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
435
return hex_fpr
436
437
438
class tcp_handler(SocketServer.BaseRequestHandler, object):
439
"""A TCP request handler class.
440
Instantiated by IPv6_TCPServer for each request to handle it.
781
782
783
def dbus_service_property(dbus_interface, signature="v",
784
access="readwrite", byte_arrays=False):
785
"""Decorators for marking methods of a DBusObjectWithProperties to
786
become properties on the D-Bus.
787
788
The decorated method will be called with no arguments by "Get"
789
and with one argument by "Set".
790
791
The parameters, where they are supported, are the same as
792
dbus.service.method, except there is only "signature", since the
793
type from Get() and the type sent to Set() is the same.
794
"""
795
# Encoding deeply encoded byte arrays is not supported yet by the
796
# "Set" method, so we fail early here:
797
if byte_arrays and signature != "ay":
798
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
800
def decorator(func):
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
return func
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
850
class DBusPropertyException(dbus.exceptions.DBusException):
851
"""A base class for D-Bus property-related exceptions
852
"""
853
def __unicode__(self):
854
return unicode(str(self))
855
856
857
class DBusPropertyAccessException(DBusPropertyException):
858
"""A property's access permissions disallows an operation.
859
"""
860
pass
861
862
863
class DBusPropertyNotFound(DBusPropertyException):
864
"""An attempt was made to access a non-existing property.
865
"""
866
pass
867
868
869
class DBusObjectWithProperties(dbus.service.Object):
870
"""A D-Bus object with properties.
871
872
Classes inheriting from this can use the dbus_service_property
873
decorator to expose methods as D-Bus properties. It exposes the
874
standard Get(), Set(), and GetAll() methods on the D-Bus.
875
"""
876
877
@staticmethod
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
886
887
def _get_all_dbus_things(self, thing):
888
"""Returns a generator of (name, attribute) pairs
889
"""
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
893
for cls in self.__class__.__mro__
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
897
898
def _get_dbus_property(self, interface_name, property_name):
899
"""Returns a bound method if one exists which is a D-Bus
900
property with the specified name and interface.
901
"""
902
for cls in self.__class__.__mro__:
903
for name, value in (inspect.getmembers
904
(cls,
905
self._is_dbus_thing("property"))):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
+ interface_name + "."
913
+ property_name)
914
915
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
947
out_signature="a{sv}")
948
def GetAll(self, interface_name):
949
"""Standard D-Bus property GetAll() method, see D-Bus
950
standard.
951
952
Note: Will not include properties with access="write".
953
"""
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
956
if (interface_name
957
and interface_name != prop._dbus_interface):
958
# Interface non-empty but did not match
959
continue
960
# Ignore write-only properties
961
if prop._dbus_access == "write":
962
continue
963
value = prop()
964
if not hasattr(value, "variant_level"):
965
properties[name] = value
966
continue
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
970
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
out_signature="s",
973
path_keyword='object_path',
974
connection_keyword='connection')
975
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
979
"""
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
connection)
982
try:
983
document = xml.dom.minidom.parseString(xmlstring)
984
def make_tag(document, name, prop):
985
e = document.createElement("property")
986
e.setAttribute("name", name)
987
e.setAttribute("type", prop._dbus_signature)
988
e.setAttribute("access", prop._dbus_access)
989
return e
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
for tag in (make_tag(document, name, prop)
993
for name, prop
994
in self._get_all_dbus_things("property")
995
if prop._dbus_interface
996
== if_tag.getAttribute("name")):
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
# Add the names to the return values for the
1030
# "org.freedesktop.DBus.Properties" methods
1031
if (if_tag.getAttribute("name")
1032
== "org.freedesktop.DBus.Properties"):
1033
for cn in if_tag.getElementsByTagName("method"):
1034
if cn.getAttribute("name") == "Get":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1037
== "out"):
1038
arg.setAttribute("name", "value")
1039
elif cn.getAttribute("name") == "GetAll":
1040
for arg in cn.getElementsByTagName("arg"):
1041
if (arg.getAttribute("direction")
1042
== "out"):
1043
arg.setAttribute("name", "props")
1044
xmlstring = document.toxml("utf-8")
1045
document.unlink()
1046
except (AttributeError, xml.dom.DOMException,
1047
xml.parsers.expat.ExpatError) as error:
1048
logger.error("Failed to override Introspection method",
1049
exc_info=error)
1050
return xmlstring
1051
1052
1053
def datetime_to_dbus(dt, variant_level=0):
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1055
if dt is None:
1056
return dbus.String("", variant_level = variant_level)
1057
return dbus.String(dt.isoformat(),
1058
variant_level=variant_level)
1059
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
1083
"""
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
# with the wrong interface name
1093
if (not hasattr(attribute, "_dbus_interface")
1094
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
1096
continue
1097
# Create an alternate D-Bus interface name based on
1098
# the current name
1099
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
1103
# Is this a D-Bus signal?
1104
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
1107
nonmethod_func = (dict(
1108
zip(attribute.func_code.co_freevars,
1109
attribute.__closure__))["func"]
1110
.cell_contents)
1111
# Create a new, but exactly alike, function
1112
# object, and decorate it to be a new D-Bus signal
1113
# with the alternate D-Bus interface name
1114
new_function = (dbus.service.signal
1115
(alt_interface,
1116
attribute._dbus_signature)
1117
(types.FunctionType(
1118
nonmethod_func.func_code,
1119
nonmethod_func.func_globals,
1120
nonmethod_func.func_name,
1121
nonmethod_func.func_defaults,
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
1129
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
1133
def fixscope(func1, func2):
1134
"""This function is a scope container to pass
1135
func1 and func2 to the "call_both" function
1136
outside of its arguments"""
1137
def call_both(*args, **kwargs):
1138
"""This function will emit two D-Bus
1139
signals by calling func1 and func2"""
1140
func1(*args, **kwargs)
1141
func2(*args, **kwargs)
1142
return call_both
1143
# Create the "call_both" function and add it to
1144
# the class
1145
attr[attrname] = fixscope(attribute, new_function)
1146
# Is this a D-Bus method?
1147
elif getattr(attribute, "_dbus_is_method", False):
1148
# Create a new, but exactly alike, function
1149
# object. Decorate it to be a new D-Bus method
1150
# with the alternate D-Bus interface name. Add it
1151
# to the class.
1152
attr[attrname] = (dbus.service.method
1153
(alt_interface,
1154
attribute._dbus_in_signature,
1155
attribute._dbus_out_signature)
1156
(types.FunctionType
1157
(attribute.func_code,
1158
attribute.func_globals,
1159
attribute.func_name,
1160
attribute.func_defaults,
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
1168
# Is this a D-Bus property?
1169
elif getattr(attribute, "_dbus_is_property", False):
1170
# Create a new, but exactly alike, function
1171
# object, and decorate it to be a new D-Bus
1172
# property with the alternate D-Bus interface
1173
# name. Add it to the class.
1174
attr[attrname] = (dbus_service_property
1175
(alt_interface,
1176
attribute._dbus_signature,
1177
attribute._dbus_access,
1178
attribute
1179
._dbus_get_args_options
1180
["byte_arrays"])
1181
(types.FunctionType
1182
(attribute.func_code,
1183
attribute.func_globals,
1184
attribute.func_name,
1185
attribute.func_defaults,
1186
attribute.func_closure)))
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
1232
class ClientDBus(Client, DBusObjectWithProperties):
1233
"""A Client class using D-Bus
1234
1235
Attributes:
1236
dbus_object_path: dbus.ObjectPath
1237
bus: dbus.SystemBus()
1238
"""
1239
1240
runtime_expansions = (Client.runtime_expansions
1241
+ ("dbus_object_path",))
1242
1243
# dbus.service.Object doesn't use super(), so we can't either.
1244
1245
def __init__(self, bus = None, *args, **kwargs):
1246
self.bus = bus
1247
Client.__init__(self, *args, **kwargs)
1248
# Only now, when this client is initialized, can it show up on
1249
# the D-Bus
1250
client_object_name = unicode(self.name).translate(
1251
{ord("."): ord("_"),
1252
ord("-"): ord("_")})
1253
self.dbus_object_path = (dbus.ObjectPath
1254
("/clients/" + client_object_name))
1255
DBusObjectWithProperties.__init__(self, self.bus,
1256
self.dbus_object_path)
1257
1258
def notifychangeproperty(transform_func,
1259
dbus_name, type_func=lambda x: x,
1260
variant_level=1):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1270
"""
1271
attrname = "_{0}".format(dbus_name)
1272
def setter(self, value):
1273
if hasattr(self, "dbus_object_path"):
1274
if (not hasattr(self, attrname) or
1275
type_func(getattr(self, attrname, None))
1276
!= type_func(value)):
1277
dbus_value = transform_func(type_func(value),
1278
variant_level
1279
=variant_level)
1280
self.PropertyChanged(dbus.String(dbus_name),
1281
dbus_value)
1282
setattr(self, attrname, value)
1283
1284
return property(lambda self: getattr(self, attrname), setter)
1285
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
1288
"ApprovalPending",
1289
type_func = bool)
1290
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
last_enabled = notifychangeproperty(datetime_to_dbus,
1292
"LastEnabled")
1293
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
type_func = lambda checker:
1295
checker is not None)
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
last_approval_request = notifychangeproperty(
1301
datetime_to_dbus, "LastApprovalRequest")
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1305
"ApprovalDelay",
1306
type_func =
1307
timedelta_to_milliseconds)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func =
1314
timedelta_to_milliseconds)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
timedelta_to_milliseconds)
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1323
1324
del notifychangeproperty
1325
1326
def __del__(self, *args, **kwargs):
1327
try:
1328
self.remove_from_connection()
1329
except LookupError:
1330
pass
1331
if hasattr(DBusObjectWithProperties, "__del__"):
1332
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
Client.__del__(self, *args, **kwargs)
1334
1335
def checker_callback(self, pid, condition, command,
1336
*args, **kwargs):
1337
self.checker_callback_tag = None
1338
self.checker = None
1339
if os.WIFEXITED(condition):
1340
exitstatus = os.WEXITSTATUS(condition)
1341
# Emit D-Bus signal
1342
self.CheckerCompleted(dbus.Int16(exitstatus),
1343
dbus.Int64(condition),
1344
dbus.String(command))
1345
else:
1346
# Emit D-Bus signal
1347
self.CheckerCompleted(dbus.Int16(-1),
1348
dbus.Int64(condition),
1349
dbus.String(command))
1350
1351
return Client.checker_callback(self, pid, condition, command,
1352
*args, **kwargs)
1353
1354
def start_checker(self, *args, **kwargs):
1355
old_checker = self.checker
1356
if self.checker is not None:
1357
old_checker_pid = self.checker.pid
1358
else:
1359
old_checker_pid = None
1360
r = Client.start_checker(self, *args, **kwargs)
1361
# Only if new checker process was started
1362
if (self.checker is not None
1363
and old_checker_pid != self.checker.pid):
1364
# Emit D-Bus signal
1365
self.CheckerStarted(self.current_checker_command)
1366
return r
1367
1368
def _reset_approved(self):
1369
self.approved = None
1370
return False
1371
1372
def approve(self, value=True):
1373
self.approved = value
1374
gobject.timeout_add(timedelta_to_milliseconds
1375
(self.approval_duration),
1376
self._reset_approved)
1377
self.send_changedstate()
1378
1379
## D-Bus methods, signals & properties
1380
_interface = "se.recompile.Mandos.Client"
1381
1382
## Interfaces
1383
1384
@dbus_interface_annotations(_interface)
1385
def _foo(self):
1386
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1387
"false"}
1388
1389
## Signals
1390
1391
# CheckerCompleted - signal
1392
@dbus.service.signal(_interface, signature="nxs")
1393
def CheckerCompleted(self, exitcode, waitstatus, command):
1394
"D-Bus signal"
1395
pass
1396
1397
# CheckerStarted - signal
1398
@dbus.service.signal(_interface, signature="s")
1399
def CheckerStarted(self, command):
1400
"D-Bus signal"
1401
pass
1402
1403
# PropertyChanged - signal
1404
@dbus.service.signal(_interface, signature="sv")
1405
def PropertyChanged(self, property, value):
1406
"D-Bus signal"
1407
pass
1408
1409
# GotSecret - signal
1410
@dbus.service.signal(_interface)
1411
def GotSecret(self):
1412
"""D-Bus signal
1413
Is sent after a successful transfer of secret from the Mandos
1414
server to mandos-client
1415
"""
1416
pass
1417
1418
# Rejected - signal
1419
@dbus.service.signal(_interface, signature="s")
1420
def Rejected(self, reason):
1421
"D-Bus signal"
1422
pass
1423
1424
# NeedApproval - signal
1425
@dbus.service.signal(_interface, signature="tb")
1426
def NeedApproval(self, timeout, default):
1427
"D-Bus signal"
1428
return self.need_approval()
1429
1430
## Methods
1431
1432
# Approve - method
1433
@dbus.service.method(_interface, in_signature="b")
1434
def Approve(self, value):
1435
self.approve(value)
1436
1437
# CheckedOK - method
1438
@dbus.service.method(_interface)
1439
def CheckedOK(self):
1440
self.checked_ok()
1441
1442
# Enable - method
1443
@dbus.service.method(_interface)
1444
def Enable(self):
1445
"D-Bus method"
1446
self.enable()
1447
1448
# StartChecker - method
1449
@dbus.service.method(_interface)
1450
def StartChecker(self):
1451
"D-Bus method"
1452
self.start_checker()
1453
1454
# Disable - method
1455
@dbus.service.method(_interface)
1456
def Disable(self):
1457
"D-Bus method"
1458
self.disable()
1459
1460
# StopChecker - method
1461
@dbus.service.method(_interface)
1462
def StopChecker(self):
1463
self.stop_checker()
1464
1465
## Properties
1466
1467
# ApprovalPending - property
1468
@dbus_service_property(_interface, signature="b", access="read")
1469
def ApprovalPending_dbus_property(self):
1470
return dbus.Boolean(bool(self.approvals_pending))
1471
1472
# ApprovedByDefault - property
1473
@dbus_service_property(_interface, signature="b",
1474
access="readwrite")
1475
def ApprovedByDefault_dbus_property(self, value=None):
1476
if value is None: # get
1477
return dbus.Boolean(self.approved_by_default)
1478
self.approved_by_default = bool(value)
1479
1480
# ApprovalDelay - property
1481
@dbus_service_property(_interface, signature="t",
1482
access="readwrite")
1483
def ApprovalDelay_dbus_property(self, value=None):
1484
if value is None: # get
1485
return dbus.UInt64(self.approval_delay_milliseconds())
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1490
access="readwrite")
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(timedelta_to_milliseconds(
1494
self.approval_duration))
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
1497
# Name - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1501
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1506
1507
# Host - property
1508
@dbus_service_property(_interface, signature="s",
1509
access="readwrite")
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = unicode(value)
1514
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1519
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1524
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1527
access="readwrite")
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1531
if value:
1532
self.enable()
1533
else:
1534
self.disable()
1535
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1538
access="readwrite")
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1541
self.checked_ok()
1542
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1555
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1560
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout_milliseconds())
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
timedelta_to_milliseconds(self.expires - now),
1584
self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout_milliseconds())
1592
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1593
1594
# Interval - property
1595
@dbus_service_property(_interface, signature="t",
1596
access="readwrite")
1597
def Interval_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.UInt64(self.interval_milliseconds())
1600
self.interval = datetime.timedelta(0, 0, 0, value)
1601
if getattr(self, "checker_initiator_tag", None) is None:
1602
return
1603
if self.enabled:
1604
# Reschedule checker run
1605
gobject.source_remove(self.checker_initiator_tag)
1606
self.checker_initiator_tag = (gobject.timeout_add
1607
(value, self.start_checker))
1608
self.start_checker() # Start one now, too
1609
1610
# Checker - property
1611
@dbus_service_property(_interface, signature="s",
1612
access="readwrite")
1613
def Checker_dbus_property(self, value=None):
1614
if value is None: # get
1615
return dbus.String(self.checker_command)
1616
self.checker_command = unicode(value)
1617
1618
# CheckerRunning - property
1619
@dbus_service_property(_interface, signature="b",
1620
access="readwrite")
1621
def CheckerRunning_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.Boolean(self.checker is not None)
1624
if value:
1625
self.start_checker()
1626
else:
1627
self.stop_checker()
1628
1629
# ObjectPath - property
1630
@dbus_service_property(_interface, signature="o", access="read")
1631
def ObjectPath_dbus_property(self):
1632
return self.dbus_object_path # is already a dbus.ObjectPath
1633
1634
# Secret = property
1635
@dbus_service_property(_interface, signature="ay",
1636
access="write", byte_arrays=True)
1637
def Secret_dbus_property(self, value):
1638
self.secret = str(value)
1639
1640
del _interface
1641
1642
1643
class ProxyClient(object):
1644
def __init__(self, child_pipe, fpr, address):
1645
self._pipe = child_pipe
1646
self._pipe.send(('init', fpr, address))
1647
if not self._pipe.recv():
1648
raise KeyError()
1649
1650
def __getattribute__(self, name):
1651
if name == '_pipe':
1652
return super(ProxyClient, self).__getattribute__(name)
1653
self._pipe.send(('getattr', name))
1654
data = self._pipe.recv()
1655
if data[0] == 'data':
1656
return data[1]
1657
if data[0] == 'function':
1658
def func(*args, **kwargs):
1659
self._pipe.send(('funcall', name, args, kwargs))
1660
return self._pipe.recv()[1]
1661
return func
1662
1663
def __setattr__(self, name, value):
1664
if name == '_pipe':
1665
return super(ProxyClient, self).__setattr__(name, value)
1666
self._pipe.send(('setattr', name, value))
1667
1668
1669
class ClientHandler(socketserver.BaseRequestHandler, object):
1670
"""A class to handle client connections.
1671
1672
Instantiated once for each connection to handle it.
441
1673
Note: This will run in its own forked process."""
442
1674
443
1675
def handle(self):
444
logger.info(u"TCP connection from: %s",
445
unicode(self.client_address))
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
449
line = self.request.makefile().readline()
450
logger.debug(u"Protocol version: %r", line)
451
try:
452
if int(line.strip().split()[0]) > 1:
453
raise RuntimeError
454
except (ValueError, IndexError, RuntimeError), error:
455
logger.error(u"Unknown protocol version: %s", error)
456
return
457
458
# Note: gnutls.connection.X509Credentials is really a generic
459
# GnuTLS certificate credentials object so long as no X.509
460
# keys are added to it. Therefore, we can use it here despite
461
# using OpenPGP certificates.
462
463
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
464
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
465
# "+DHE-DSS"))
466
priority = "NORMAL" # Fallback default, since this
467
# MUST be set.
468
if self.server.settings["priority"]:
469
priority = self.server.settings["priority"]
470
gnutls.library.functions.gnutls_priority_set_direct\
471
(session._c_object, priority, None);
472
473
try:
474
session.handshake()
475
except gnutls.errors.GNUTLSError, error:
476
logger.warning(u"Handshake failed: %s", error)
477
# Do not run session.bye() here: the session is not
478
# established. Just abandon the request.
479
return
480
try:
481
fpr = fingerprint(peer_certificate(session))
482
except (TypeError, gnutls.errors.GNUTLSError), error:
483
logger.warning(u"Bad certificate: %s", error)
484
session.bye()
485
return
486
logger.debug(u"Fingerprint: %s", fpr)
487
client = None
488
for c in self.server.clients:
489
if c.fingerprint == fpr:
490
client = c
491
break
492
if not client:
493
logger.warning(u"Client not found for fingerprint: %s",
494
fpr)
495
session.bye()
496
return
497
# Have to check if client.still_valid(), since it is possible
498
# that the client timed out while establishing the GnuTLS
499
# session.
500
if not client.still_valid():
501
logger.warning(u"Client %(name)s is invalid",
502
vars(client))
503
session.bye()
504
return
505
sent_size = 0
506
while sent_size < len(client.secret):
507
sent = session.send(client.secret[sent_size:])
508
logger.debug(u"Sent: %d, remaining: %d",
509
sent, len(client.secret)
510
- (sent_size + sent))
511
sent_size += sent
512
session.bye()
513
514
515
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
516
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1676
with contextlib.closing(self.server.child_pipe) as child_pipe:
1677
logger.info("TCP connection from: %s",
1678
unicode(self.client_address))
1679
logger.debug("Pipe FD: %d",
1680
self.server.child_pipe.fileno())
1681
1682
session = (gnutls.connection
1683
.ClientSession(self.request,
1684
gnutls.connection
1685
.X509Credentials()))
1686
1687
# Note: gnutls.connection.X509Credentials is really a
1688
# generic GnuTLS certificate credentials object so long as
1689
# no X.509 keys are added to it. Therefore, we can use it
1690
# here despite using OpenPGP certificates.
1691
1692
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1693
# "+AES-256-CBC", "+SHA1",
1694
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
# "+DHE-DSS"))
1696
# Use a fallback default, since this MUST be set.
1697
priority = self.server.gnutls_priority
1698
if priority is None:
1699
priority = "NORMAL"
1700
(gnutls.library.functions
1701
.gnutls_priority_set_direct(session._c_object,
1702
priority, None))
1703
1704
# Start communication using the Mandos protocol
1705
# Get protocol number
1706
line = self.request.makefile().readline()
1707
logger.debug("Protocol version: %r", line)
1708
try:
1709
if int(line.strip().split()[0]) > 1:
1710
raise RuntimeError(line)
1711
except (ValueError, IndexError, RuntimeError) as error:
1712
logger.error("Unknown protocol version: %s", error)
1713
return
1714
1715
# Start GnuTLS connection
1716
try:
1717
session.handshake()
1718
except gnutls.errors.GNUTLSError as error:
1719
logger.warning("Handshake failed: %s", error)
1720
# Do not run session.bye() here: the session is not
1721
# established. Just abandon the request.
1722
return
1723
logger.debug("Handshake succeeded")
1724
1725
approval_required = False
1726
try:
1727
try:
1728
fpr = self.fingerprint(self.peer_certificate
1729
(session))
1730
except (TypeError,
1731
gnutls.errors.GNUTLSError) as error:
1732
logger.warning("Bad certificate: %s", error)
1733
return
1734
logger.debug("Fingerprint: %s", fpr)
1735
1736
try:
1737
client = ProxyClient(child_pipe, fpr,
1738
self.client_address)
1739
except KeyError:
1740
return
1741
1742
if client.approval_delay:
1743
delay = client.approval_delay
1744
client.approvals_pending += 1
1745
approval_required = True
1746
1747
while True:
1748
if not client.enabled:
1749
logger.info("Client %s is disabled",
1750
client.name)
1751
if self.server.use_dbus:
1752
# Emit D-Bus signal
1753
client.Rejected("Disabled")
1754
return
1755
1756
if client.approved or not client.approval_delay:
1757
#We are approved or approval is disabled
1758
break
1759
elif client.approved is None:
1760
logger.info("Client %s needs approval",
1761
client.name)
1762
if self.server.use_dbus:
1763
# Emit D-Bus signal
1764
client.NeedApproval(
1765
client.approval_delay_milliseconds(),
1766
client.approved_by_default)
1767
else:
1768
logger.warning("Client %s was not approved",
1769
client.name)
1770
if self.server.use_dbus:
1771
# Emit D-Bus signal
1772
client.Rejected("Denied")
1773
return
1774
1775
#wait until timeout or approved
1776
time = datetime.datetime.now()
1777
client.changedstate.acquire()
1778
client.changedstate.wait(
1779
float(timedelta_to_milliseconds(delay)
1780
/ 1000))
1781
client.changedstate.release()
1782
time2 = datetime.datetime.now()
1783
if (time2 - time) >= delay:
1784
if not client.approved_by_default:
1785
logger.warning("Client %s timed out while"
1786
" waiting for approval",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.Rejected("Approval timed out")
1791
return
1792
else:
1793
break
1794
else:
1795
delay -= time2 - time
1796
1797
sent_size = 0
1798
while sent_size < len(client.secret):
1799
try:
1800
sent = session.send(client.secret[sent_size:])
1801
except gnutls.errors.GNUTLSError as error:
1802
logger.warning("gnutls send failed",
1803
exc_info=error)
1804
return
1805
logger.debug("Sent: %d, remaining: %d",
1806
sent, len(client.secret)
1807
- (sent_size + sent))
1808
sent_size += sent
1809
1810
logger.info("Sending secret to %s", client.name)
1811
# bump the timeout using extended_timeout
1812
client.bump_timeout(client.extended_timeout)
1813
if self.server.use_dbus:
1814
# Emit D-Bus signal
1815
client.GotSecret()
1816
1817
finally:
1818
if approval_required:
1819
client.approvals_pending -= 1
1820
try:
1821
session.bye()
1822
except gnutls.errors.GNUTLSError as error:
1823
logger.warning("GnuTLS bye failed",
1824
exc_info=error)
1825
1826
@staticmethod
1827
def peer_certificate(session):
1828
"Return the peer's OpenPGP certificate as a bytestring"
1829
# If not an OpenPGP certificate...
1830
if (gnutls.library.functions
1831
.gnutls_certificate_type_get(session._c_object)
1832
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1833
# ...do the normal thing
1834
return session.peer_certificate
1835
list_size = ctypes.c_uint(1)
1836
cert_list = (gnutls.library.functions
1837
.gnutls_certificate_get_peers
1838
(session._c_object, ctypes.byref(list_size)))
1839
if not bool(cert_list) and list_size.value != 0:
1840
raise gnutls.errors.GNUTLSError("error getting peer"
1841
" certificate")
1842
if list_size.value == 0:
1843
return None
1844
cert = cert_list[0]
1845
return ctypes.string_at(cert.data, cert.size)
1846
1847
@staticmethod
1848
def fingerprint(openpgp):
1849
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1850
# New GnuTLS "datum" with the OpenPGP public key
1851
datum = (gnutls.library.types
1852
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1853
ctypes.POINTER
1854
(ctypes.c_ubyte)),
1855
ctypes.c_uint(len(openpgp))))
1856
# New empty GnuTLS certificate
1857
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1858
(gnutls.library.functions
1859
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1860
# Import the OpenPGP public key into the certificate
1861
(gnutls.library.functions
1862
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1863
gnutls.library.constants
1864
.GNUTLS_OPENPGP_FMT_RAW))
1865
# Verify the self signature in the key
1866
crtverify = ctypes.c_uint()
1867
(gnutls.library.functions
1868
.gnutls_openpgp_crt_verify_self(crt, 0,
1869
ctypes.byref(crtverify)))
1870
if crtverify.value != 0:
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1872
raise (gnutls.errors.CertificateSecurityError
1873
("Verify failed"))
1874
# New buffer for the fingerprint
1875
buf = ctypes.create_string_buffer(20)
1876
buf_len = ctypes.c_size_t()
1877
# Get the fingerprint from the certificate into the buffer
1878
(gnutls.library.functions
1879
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1880
ctypes.byref(buf_len)))
1881
# Deinit the certificate
1882
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1883
# Convert the buffer to a Python bytestring
1884
fpr = ctypes.string_at(buf, buf_len.value)
1885
# Convert the bytestring to hexadecimal notation
1886
hex_fpr = binascii.hexlify(fpr).upper()
1887
return hex_fpr
1888
1889
1890
class MultiprocessingMixIn(object):
1891
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1892
def sub_process_main(self, request, address):
1893
try:
1894
self.finish_request(request, address)
1895
except Exception:
1896
self.handle_error(request, address)
1897
self.close_request(request)
1898
1899
def process_request(self, request, address):
1900
"""Start a new process to process the request."""
1901
proc = multiprocessing.Process(target = self.sub_process_main,
1902
args = (request, address))
1903
proc.start()
1904
return proc
1905
1906
1907
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1908
""" adds a pipe to the MixIn """
1909
def process_request(self, request, client_address):
1910
"""Overrides and wraps the original process_request().
1911
1912
This function creates a new pipe in self.pipe
1913
"""
1914
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1915
1916
proc = MultiprocessingMixIn.process_request(self, request,
1917
client_address)
1918
self.child_pipe.close()
1919
self.add_pipe(parent_pipe, proc)
1920
1921
def add_pipe(self, parent_pipe, proc):
1922
"""Dummy function; override as necessary"""
1923
raise NotImplementedError()
1924
1925
1926
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1927
socketserver.TCPServer, object):
1928
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1929
517
1930
Attributes:
518
settings: Server settings
519
clients: Set() of Client objects
1931
enabled: Boolean; whether this server is activated yet
1932
interface: None or a network interface name (string)
1933
use_ipv6: Boolean; to use IPv6 or not
520
1934
"""
521
address_family = socket.AF_INET6
522
def __init__(self, *args, **kwargs):
523
if "settings" in kwargs:
524
self.settings = kwargs["settings"]
525
del kwargs["settings"]
526
if "clients" in kwargs:
527
self.clients = kwargs["clients"]
528
del kwargs["clients"]
529
return super(type(self), self).__init__(*args, **kwargs)
1935
def __init__(self, server_address, RequestHandlerClass,
1936
interface=None, use_ipv6=True, socketfd=None):
1937
"""If socketfd is set, use that file descriptor instead of
1938
creating a new one with socket.socket().
1939
"""
1940
self.interface = interface
1941
if use_ipv6:
1942
self.address_family = socket.AF_INET6
1943
if socketfd is not None:
1944
# Save the file descriptor
1945
self.socketfd = socketfd
1946
# Save the original socket.socket() function
1947
self.socket_socket = socket.socket
1948
# To implement --socket, we monkey patch socket.socket.
1949
#
1950
# (When socketserver.TCPServer is a new-style class, we
1951
# could make self.socket into a property instead of monkey
1952
# patching socket.socket.)
1953
#
1954
# Create a one-time-only replacement for socket.socket()
1955
@functools.wraps(socket.socket)
1956
def socket_wrapper(*args, **kwargs):
1957
# Restore original function so subsequent calls are
1958
# not affected.
1959
socket.socket = self.socket_socket
1960
del self.socket_socket
1961
# This time only, return a new socket object from the
1962
# saved file descriptor.
1963
return socket.fromfd(self.socketfd, *args, **kwargs)
1964
# Replace socket.socket() function with wrapper
1965
socket.socket = socket_wrapper
1966
# The socketserver.TCPServer.__init__ will call
1967
# socket.socket(), which might be our replacement,
1968
# socket_wrapper(), if socketfd was set.
1969
socketserver.TCPServer.__init__(self, server_address,
1970
RequestHandlerClass)
1971
530
1972
def server_bind(self):
531
1973
"""This overrides the normal server_bind() function
532
1974
to bind to an interface if one was specified, and also NOT to
533
1975
bind to an address or port if they were not specified."""
534
if self.settings["interface"]:
535
# 25 is from /usr/include/asm-i486/socket.h
536
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
try:
538
self.socket.setsockopt(socket.SOL_SOCKET,
539
SO_BINDTODEVICE,
540
self.settings["interface"])
541
except socket.error, error:
542
if error[0] == errno.EPERM:
543
logger.error(u"No permission to"
544
u" bind to interface %s",
545
self.settings["interface"])
546
else:
547
raise error
1976
if self.interface is not None:
1977
if SO_BINDTODEVICE is None:
1978
logger.error("SO_BINDTODEVICE does not exist;"
1979
" cannot bind to interface %s",
1980
self.interface)
1981
else:
1982
try:
1983
self.socket.setsockopt(socket.SOL_SOCKET,
1984
SO_BINDTODEVICE,
1985
str(self.interface + '\0'))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
else:
1998
raise
548
1999
# Only bind(2) the socket if we really need to.
549
2000
if self.server_address[0] or self.server_address[1]:
550
2001
if not self.server_address[0]:
551
in6addr_any = "::"
552
self.server_address = (in6addr_any,
2002
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
2004
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
2006
self.server_address = (any_address,
553
2007
self.server_address[1])
554
2008
elif not self.server_address[1]:
555
2009
self.server_address = (self.server_address[0],
556
2010
0)
557
# if self.settings["interface"]:
2011
# if self.interface:
558
2012
# self.server_address = (self.server_address[0],
559
2013
# 0, # port
560
2014
# 0, # flowinfo
561
2015
# if_nametoindex
562
# (self.settings
563
# ["interface"]))
564
return super(type(self), self).server_bind()
2016
# (self.interface))
2017
return socketserver.TCPServer.server_bind(self)
2018
2019
2020
class MandosServer(IPv6_TCPServer):
2021
"""Mandos server.
2022
2023
Attributes:
2024
clients: set of Client objects
2025
gnutls_priority GnuTLS priority string
2026
use_dbus: Boolean; to emit D-Bus signals or not
2027
2028
Assumes a gobject.MainLoop event loop.
2029
"""
2030
def __init__(self, server_address, RequestHandlerClass,
2031
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
2033
self.enabled = False
2034
self.clients = clients
2035
if self.clients is None:
2036
self.clients = {}
2037
self.use_dbus = use_dbus
2038
self.gnutls_priority = gnutls_priority
2039
IPv6_TCPServer.__init__(self, server_address,
2040
RequestHandlerClass,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
2044
def server_activate(self):
2045
if self.enabled:
2046
return socketserver.TCPServer.server_activate(self)
2047
2048
def enable(self):
2049
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
2052
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
2066
return False
2067
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2071
2072
if command == 'init':
2073
fpr = request[1]
2074
address = request[2]
2075
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2078
client = c
2079
break
2080
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2083
if self.use_dbus:
2084
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
2087
parent_pipe.send(False)
2088
return False
2089
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
2101
return False
2102
if command == 'funcall':
2103
funcname = request[1]
2104
args = request[2]
2105
kwargs = request[3]
2106
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2115
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2118
2119
if command == 'setattr':
2120
attrname = request[1]
2121
value = request[2]
2122
setattr(client_object, attrname, value)
2123
2124
return True
2125
2126
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week))),
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset(token_duration,) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
565
2224
566
2225
567
2226
def string_to_delta(interval):
568
2227
"""Parse a string and return a datetime.timedelta
569
2228
570
2229
>>> string_to_delta('7d')
571
2230
datetime.timedelta(7)
572
2231
>>> string_to_delta('60s')
575
2234
datetime.timedelta(0, 3600)
576
2235
>>> string_to_delta('24h')
577
2236
datetime.timedelta(1)
578
>>> string_to_delta(u'1w')
2237
>>> string_to_delta('1w')
579
2238
datetime.timedelta(7)
580
2239
>>> string_to_delta('5m 30s')
581
2240
datetime.timedelta(0, 330)
582
2241
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
583
2248
timevalue = datetime.timedelta(0)
584
2249
for s in interval.split():
585
2250
try:
586
suffix=unicode(s[-1])
587
value=int(s[:-1])
588
if suffix == u"d":
2251
suffix = unicode(s[-1])
2252
value = int(s[:-1])
2253
if suffix == "d":
589
2254
delta = datetime.timedelta(value)
590
elif suffix == u"s":
2255
elif suffix == "s":
591
2256
delta = datetime.timedelta(0, value)
592
elif suffix == u"m":
2257
elif suffix == "m":
593
2258
delta = datetime.timedelta(0, 0, 0, 0, value)
594
elif suffix == u"h":
2259
elif suffix == "h":
595
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
596
elif suffix == u"w":
2261
elif suffix == "w":
597
2262
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
598
2263
else:
599
raise ValueError
600
except (ValueError, IndexError):
601
raise ValueError
2264
raise ValueError("Unknown suffix {0!r}"
2265
.format(suffix))
2266
except IndexError as e:
2267
raise ValueError(*(e.args))
602
2268
timevalue += delta
603
2269
return timevalue
604
2270
605
2271
606
def server_state_changed(state):
607
"""Derived from the Avahi example code"""
608
if state == avahi.SERVER_COLLISION:
609
logger.error(u"Zeroconf server name collision")
610
service.remove()
611
elif state == avahi.SERVER_RUNNING:
612
service.add()
613
614
615
def entry_group_state_changed(state, error):
616
"""Derived from the Avahi example code"""
617
logger.debug(u"Avahi state change: %i", state)
618
619
if state == avahi.ENTRY_GROUP_ESTABLISHED:
620
logger.debug(u"Zeroconf service established.")
621
elif state == avahi.ENTRY_GROUP_COLLISION:
622
logger.warning(u"Zeroconf service name collision.")
623
service.rename()
624
elif state == avahi.ENTRY_GROUP_FAILURE:
625
logger.critical(u"Avahi: Error in group state changed %s",
626
unicode(error))
627
raise AvahiGroupError("State changed: %s", str(error))
628
629
def if_nametoindex(interface):
630
"""Call the C function if_nametoindex(), or equivalent"""
631
global if_nametoindex
632
try:
633
if "ctypes.util" not in sys.modules:
634
import ctypes.util
635
if_nametoindex = ctypes.cdll.LoadLibrary\
636
(ctypes.util.find_library("c")).if_nametoindex
637
except (OSError, AttributeError):
638
if "struct" not in sys.modules:
639
import struct
640
if "fcntl" not in sys.modules:
641
import fcntl
642
def if_nametoindex(interface):
643
"Get an interface index the hard way, i.e. using fcntl()"
644
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
645
s = socket.socket()
646
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
647
struct.pack("16s16x", interface))
648
s.close()
649
interface_index = struct.unpack("I", ifreq[16:20])[0]
650
return interface_index
651
return if_nametoindex(interface)
652
653
654
2272
def daemon(nochdir = False, noclose = False):
655
2273
"""See daemon(3). Standard BSD Unix function.
2274
656
2275
This should really exist as os.daemon, but it doesn't (yet)."""
657
2276
if os.fork():
658
2277
sys.exit()
663
2282
sys.exit()
664
2283
if not noclose:
665
2284
# Close all standard open file descriptors
666
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
667
2286
if not stat.S_ISCHR(os.fstat(null).st_mode):
668
2287
raise OSError(errno.ENODEV,
669
"/dev/null not a character device")
2288
"{0} not a character device"
2289
.format(os.devnull))
670
2290
os.dup2(null, sys.stdin.fileno())
671
2291
os.dup2(null, sys.stdout.fileno())
672
2292
os.dup2(null, sys.stderr.fileno())
675
2295
676
2296
677
2297
def main():
678
global main_loop_started
679
main_loop_started = False
680
681
parser = OptionParser(version = "%%prog %s" % version)
682
parser.add_option("-i", "--interface", type="string",
683
metavar="IF", help="Bind to interface IF")
684
parser.add_option("-a", "--address", type="string",
685
help="Address to listen for requests on")
686
parser.add_option("-p", "--port", type="int",
687
help="Port number to receive requests on")
688
parser.add_option("--check", action="store_true", default=False,
689
help="Run self-test")
690
parser.add_option("--debug", action="store_true",
691
help="Debug mode; run in foreground and log to"
692
" terminal")
693
parser.add_option("--priority", type="string", help="GnuTLS"
694
" priority string (see GnuTLS documentation)")
695
parser.add_option("--servicename", type="string", metavar="NAME",
696
help="Zeroconf service name")
697
parser.add_option("--configdir", type="string",
698
default="/etc/mandos", metavar="DIR",
699
help="Directory to search for configuration"
700
" files")
701
(options, args) = parser.parse_args()
2298
2299
##################################################################
2300
# Parsing of options, both command line and config file
2301
2302
parser = argparse.ArgumentParser()
2303
parser.add_argument("-v", "--version", action="version",
2304
version = "%(prog)s {0}".format(version),
2305
help="show version number and exit")
2306
parser.add_argument("-i", "--interface", metavar="IF",
2307
help="Bind to interface IF")
2308
parser.add_argument("-a", "--address",
2309
help="Address to listen for requests on")
2310
parser.add_argument("-p", "--port", type=int,
2311
help="Port number to receive requests on")
2312
parser.add_argument("--check", action="store_true",
2313
help="Run self-test")
2314
parser.add_argument("--debug", action="store_true",
2315
help="Debug mode; run in foreground and log"
2316
" to terminal", default=None)
2317
parser.add_argument("--debuglevel", metavar="LEVEL",
2318
help="Debug level for stdout output")
2319
parser.add_argument("--priority", help="GnuTLS"
2320
" priority string (see GnuTLS documentation)")
2321
parser.add_argument("--servicename",
2322
metavar="NAME", help="Zeroconf service name")
2323
parser.add_argument("--configdir",
2324
default="/etc/mandos", metavar="DIR",
2325
help="Directory to search for configuration"
2326
" files")
2327
parser.add_argument("--no-dbus", action="store_false",
2328
dest="use_dbus", help="Do not provide D-Bus"
2329
" system bus interface", default=None)
2330
parser.add_argument("--no-ipv6", action="store_false",
2331
dest="use_ipv6", help="Do not use IPv6",
2332
default=None)
2333
parser.add_argument("--no-restore", action="store_false",
2334
dest="restore", help="Do not restore stored"
2335
" state", default=None)
2336
parser.add_argument("--socket", type=int,
2337
help="Specify a file descriptor to a network"
2338
" socket to use instead of creating one")
2339
parser.add_argument("--statedir", metavar="DIR",
2340
help="Directory to save/restore state in")
2341
parser.add_argument("--foreground", action="store_true",
2342
help="Run in foreground", default=None)
2343
2344
options = parser.parse_args()
702
2345
703
2346
if options.check:
704
2347
import doctest
705
doctest.testmod()
706
sys.exit()
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
707
2350
708
2351
# Default values for config file for server-global settings
709
2352
server_defaults = { "interface": "",
711
2354
"port": "",
712
2355
"debug": "False",
713
2356
"priority":
714
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
715
2358
"servicename": "Mandos",
2359
"use_dbus": "True",
2360
"use_ipv6": "True",
2361
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
716
2366
}
717
2367
718
2368
# Parse config file for server-global settings
719
server_config = ConfigParser.SafeConfigParser(server_defaults)
2369
server_config = configparser.SafeConfigParser(server_defaults)
720
2370
del server_defaults
721
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2371
server_config.read(os.path.join(options.configdir,
2372
"mandos.conf"))
722
2373
# Convert the SafeConfigParser object to a dict
723
2374
server_settings = server_config.defaults()
724
# Use getboolean on the boolean config option
725
server_settings["debug"] = server_config.getboolean\
726
("DEFAULT", "debug")
2375
# Use the appropriate methods on the non-string config options
2376
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2377
server_settings[option] = server_config.getboolean("DEFAULT",
2378
option)
2379
if server_settings["port"]:
2380
server_settings["port"] = server_config.getint("DEFAULT",
2381
"port")
2382
if server_settings["socket"]:
2383
server_settings["socket"] = server_config.getint("DEFAULT",
2384
"socket")
2385
# Later, stdin will, and stdout and stderr might, be dup'ed
2386
# over with an opened os.devnull. But we don't want this to
2387
# happen with a supplied network socket.
2388
if 0 <= server_settings["socket"] <= 2:
2389
server_settings["socket"] = os.dup(server_settings
2390
["socket"])
727
2391
del server_config
728
2392
729
2393
# Override the settings from the config file with command line
730
2394
# options, if set.
731
2395
for option in ("interface", "address", "port", "debug",
732
"priority", "servicename", "configdir"):
2396
"priority", "servicename", "configdir",
2397
"use_dbus", "use_ipv6", "debuglevel", "restore",
2398
"statedir", "socket", "foreground"):
733
2399
value = getattr(options, option)
734
2400
if value is not None:
735
2401
server_settings[option] = value
736
2402
del options
2403
# Force all strings to be unicode
2404
for option in server_settings.keys():
2405
if type(server_settings[option]) is str:
2406
server_settings[option] = unicode(server_settings[option])
2407
# Force all boolean options to be boolean
2408
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2409
"foreground"):
2410
server_settings[option] = bool(server_settings[option])
2411
# Debug implies foreground
2412
if server_settings["debug"]:
2413
server_settings["foreground"] = True
737
2414
# Now we have our good server settings in "server_settings"
738
2415
2416
##################################################################
2417
2418
# For convenience
739
2419
debug = server_settings["debug"]
2420
debuglevel = server_settings["debuglevel"]
2421
use_dbus = server_settings["use_dbus"]
2422
use_ipv6 = server_settings["use_ipv6"]
2423
stored_state_path = os.path.join(server_settings["statedir"],
2424
stored_state_file)
2425
foreground = server_settings["foreground"]
740
2426
741
if not debug:
742
syslogger.setLevel(logging.WARNING)
743
console.setLevel(logging.WARNING)
2427
if debug:
2428
initlogger(debug, logging.DEBUG)
2429
else:
2430
if not debuglevel:
2431
initlogger(debug)
2432
else:
2433
level = getattr(logging, debuglevel.upper())
2434
initlogger(debug, level)
744
2435
745
2436
if server_settings["servicename"] != "Mandos":
746
syslogger.setFormatter(logging.Formatter\
747
('Mandos (%s): %%(levelname)s:'
748
' %%(message)s'
749
% server_settings["servicename"]))
2437
syslogger.setFormatter(logging.Formatter
2438
('Mandos ({0}) [%(process)d]:'
2439
' %(levelname)s: %(message)s'
2440
.format(server_settings
2441
["servicename"])))
750
2442
751
2443
# Parse config file with clients
752
client_defaults = { "timeout": "1h",
753
"interval": "5m",
754
"checker": "fping -q -- %(host)s",
755
"host": "",
756
}
757
client_config = ConfigParser.SafeConfigParser(client_defaults)
2444
client_config = configparser.SafeConfigParser(Client
2445
.client_defaults)
758
2446
client_config.read(os.path.join(server_settings["configdir"],
759
2447
"clients.conf"))
760
2448
761
global service
762
service = AvahiService(name = server_settings["servicename"],
763
type = "_mandos._tcp", );
764
if server_settings["interface"]:
765
service.interface = if_nametoindex\
766
(server_settings["interface"])
2449
global mandos_dbus_service
2450
mandos_dbus_service = None
2451
2452
tcp_server = MandosServer((server_settings["address"],
2453
server_settings["port"]),
2454
ClientHandler,
2455
interface=(server_settings["interface"]
2456
or None),
2457
use_ipv6=use_ipv6,
2458
gnutls_priority=
2459
server_settings["priority"],
2460
use_dbus=use_dbus,
2461
socketfd=(server_settings["socket"]
2462
or None))
2463
if not foreground:
2464
pidfilename = "/run/mandos.pid"
2465
if not os.path.isdir("/run/."):
2466
pidfilename = "/var/run/mandos.pid"
2467
pidfile = None
2468
try:
2469
pidfile = open(pidfilename, "w")
2470
except IOError as e:
2471
logger.error("Could not open file %r", pidfilename,
2472
exc_info=e)
2473
2474
for name in ("_mandos", "mandos", "nobody"):
2475
try:
2476
uid = pwd.getpwnam(name).pw_uid
2477
gid = pwd.getpwnam(name).pw_gid
2478
break
2479
except KeyError:
2480
continue
2481
else:
2482
uid = 65534
2483
gid = 65534
2484
try:
2485
os.setgid(gid)
2486
os.setuid(uid)
2487
except OSError as error:
2488
if error.errno != errno.EPERM:
2489
raise
2490
2491
if debug:
2492
# Enable all possible GnuTLS debugging
2493
2494
# "Use a log level over 10 to enable all debugging options."
2495
# - GnuTLS manual
2496
gnutls.library.functions.gnutls_global_set_log_level(11)
2497
2498
@gnutls.library.types.gnutls_log_func
2499
def debug_gnutls(level, string):
2500
logger.debug("GnuTLS: %s", string[:-1])
2501
2502
(gnutls.library.functions
2503
.gnutls_global_set_log_function(debug_gnutls))
2504
2505
# Redirect stdin so all checkers get /dev/null
2506
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2507
os.dup2(null, sys.stdin.fileno())
2508
if null > 2:
2509
os.close(null)
2510
2511
# Need to fork before connecting to D-Bus
2512
if not foreground:
2513
# Close all input and output, do double fork, etc.
2514
daemon()
2515
2516
# multiprocessing will use threads, so before we use gobject we
2517
# need to inform gobject that threads will be used.
2518
gobject.threads_init()
767
2519
768
2520
global main_loop
769
global bus
770
global server
771
2521
# From the Avahi example code
772
DBusGMainLoop(set_as_default=True )
2522
DBusGMainLoop(set_as_default=True)
773
2523
main_loop = gobject.MainLoop()
774
2524
bus = dbus.SystemBus()
775
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
776
avahi.DBUS_PATH_SERVER),
777
avahi.DBUS_INTERFACE_SERVER)
778
2525
# End of Avahi example code
779
780
clients = Set()
781
def remove_from_clients(client):
782
clients.remove(client)
783
if not clients:
784
logger.critical(u"No clients left, exiting")
785
sys.exit()
786
787
clients.update(Set(Client(name = section,
788
stop_hook = remove_from_clients,
789
config
790
= dict(client_config.items(section)))
791
for section in client_config.sections()))
792
if not clients:
793
logger.critical(u"No clients defined")
794
sys.exit(1)
795
796
if debug:
797
# Redirect stdin so all checkers get /dev/null
798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
799
os.dup2(null, sys.stdin.fileno())
800
if null > 2:
801
os.close(null)
802
else:
803
# No console logging
804
logger.removeHandler(console)
805
# Close all input and output, do double fork, etc.
806
daemon()
807
808
pidfilename = "/var/run/mandos/mandos.pid"
809
pid = os.getpid()
810
try:
811
pidfile = open(pidfilename, "w")
812
pidfile.write(str(pid) + "\n")
813
pidfile.close()
2526
if use_dbus:
2527
try:
2528
bus_name = dbus.service.BusName("se.recompile.Mandos",
2529
bus, do_not_queue=True)
2530
old_bus_name = (dbus.service.BusName
2531
("se.bsnet.fukt.Mandos", bus,
2532
do_not_queue=True))
2533
except dbus.exceptions.NameExistsException as e:
2534
logger.error("Disabling D-Bus:", exc_info=e)
2535
use_dbus = False
2536
server_settings["use_dbus"] = False
2537
tcp_server.use_dbus = False
2538
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2539
service = AvahiServiceToSyslog(name =
2540
server_settings["servicename"],
2541
servicetype = "_mandos._tcp",
2542
protocol = protocol, bus = bus)
2543
if server_settings["interface"]:
2544
service.interface = (if_nametoindex
2545
(str(server_settings["interface"])))
2546
2547
global multiprocessing_manager
2548
multiprocessing_manager = multiprocessing.Manager()
2549
2550
client_class = Client
2551
if use_dbus:
2552
client_class = functools.partial(ClientDBus, bus = bus)
2553
2554
client_settings = Client.config_parser(client_config)
2555
old_client_settings = {}
2556
clients_data = {}
2557
2558
# This is used to redirect stdout and stderr for checker processes
2559
global wnull
2560
wnull = open(os.devnull, "w") # A writable /dev/null
2561
# Only used if server is running in foreground but not in debug
2562
# mode
2563
if debug or not foreground:
2564
wnull.close()
2565
2566
# Get client data and settings from last running state.
2567
if server_settings["restore"]:
2568
try:
2569
with open(stored_state_path, "rb") as stored_state:
2570
clients_data, old_client_settings = (pickle.load
2571
(stored_state))
2572
os.remove(stored_state_path)
2573
except IOError as e:
2574
if e.errno == errno.ENOENT:
2575
logger.warning("Could not load persistent state: {0}"
2576
.format(os.strerror(e.errno)))
2577
else:
2578
logger.critical("Could not load persistent state:",
2579
exc_info=e)
2580
raise
2581
except EOFError as e:
2582
logger.warning("Could not load persistent state: "
2583
"EOFError:", exc_info=e)
2584
2585
with PGPEngine() as pgp:
2586
for client_name, client in clients_data.iteritems():
2587
# Skip removed clients
2588
if client_name not in client_settings:
2589
continue
2590
2591
# Decide which value to use after restoring saved state.
2592
# We have three different values: Old config file,
2593
# new config file, and saved state.
2594
# New config value takes precedence if it differs from old
2595
# config value, otherwise use saved state.
2596
for name, value in client_settings[client_name].items():
2597
try:
2598
# For each value in new config, check if it
2599
# differs from the old config value (Except for
2600
# the "secret" attribute)
2601
if (name != "secret" and
2602
value != old_client_settings[client_name]
2603
[name]):
2604
client[name] = value
2605
except KeyError:
2606
pass
2607
2608
# Clients who has passed its expire date can still be
2609
# enabled if its last checker was successful. Clients
2610
# whose checker succeeded before we stored its state is
2611
# assumed to have successfully run all checkers during
2612
# downtime.
2613
if client["enabled"]:
2614
if datetime.datetime.utcnow() >= client["expires"]:
2615
if not client["last_checked_ok"]:
2616
logger.warning(
2617
"disabling client {0} - Client never "
2618
"performed a successful checker"
2619
.format(client_name))
2620
client["enabled"] = False
2621
elif client["last_checker_status"] != 0:
2622
logger.warning(
2623
"disabling client {0} - Client "
2624
"last checker failed with error code {1}"
2625
.format(client_name,
2626
client["last_checker_status"]))
2627
client["enabled"] = False
2628
else:
2629
client["expires"] = (datetime.datetime
2630
.utcnow()
2631
+ client["timeout"])
2632
logger.debug("Last checker succeeded,"
2633
" keeping {0} enabled"
2634
.format(client_name))
2635
try:
2636
client["secret"] = (
2637
pgp.decrypt(client["encrypted_secret"],
2638
client_settings[client_name]
2639
["secret"]))
2640
except PGPError:
2641
# If decryption fails, we use secret from new settings
2642
logger.debug("Failed to decrypt {0} old secret"
2643
.format(client_name))
2644
client["secret"] = (
2645
client_settings[client_name]["secret"])
2646
2647
# Add/remove clients based on new changes made to config
2648
for client_name in (set(old_client_settings)
2649
- set(client_settings)):
2650
del clients_data[client_name]
2651
for client_name in (set(client_settings)
2652
- set(old_client_settings)):
2653
clients_data[client_name] = client_settings[client_name]
2654
2655
# Create all client objects
2656
for client_name, client in clients_data.iteritems():
2657
tcp_server.clients[client_name] = client_class(
2658
name = client_name, settings = client,
2659
server_settings = server_settings)
2660
2661
if not tcp_server.clients:
2662
logger.warning("No clients defined")
2663
2664
if not foreground:
2665
if pidfile is not None:
2666
try:
2667
with pidfile:
2668
pid = os.getpid()
2669
pidfile.write(str(pid) + "\n".encode("utf-8"))
2670
except IOError:
2671
logger.error("Could not write to file %r with PID %d",
2672
pidfilename, pid)
814
2673
del pidfile
815
except IOError, err:
816
logger.error(u"Could not write %s file with PID %d",
817
pidfilename, os.getpid())
2674
del pidfilename
2675
2676
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2677
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2678
2679
if use_dbus:
2680
@alternate_dbus_interfaces({"se.recompile.Mandos":
2681
"se.bsnet.fukt.Mandos"})
2682
class MandosDBusService(DBusObjectWithProperties):
2683
"""A D-Bus proxy object"""
2684
def __init__(self):
2685
dbus.service.Object.__init__(self, bus, "/")
2686
_interface = "se.recompile.Mandos"
2687
2688
@dbus_interface_annotations(_interface)
2689
def _foo(self):
2690
return { "org.freedesktop.DBus.Property"
2691
".EmitsChangedSignal":
2692
"false"}
2693
2694
@dbus.service.signal(_interface, signature="o")
2695
def ClientAdded(self, objpath):
2696
"D-Bus signal"
2697
pass
2698
2699
@dbus.service.signal(_interface, signature="ss")
2700
def ClientNotFound(self, fingerprint, address):
2701
"D-Bus signal"
2702
pass
2703
2704
@dbus.service.signal(_interface, signature="os")
2705
def ClientRemoved(self, objpath, name):
2706
"D-Bus signal"
2707
pass
2708
2709
@dbus.service.method(_interface, out_signature="ao")
2710
def GetAllClients(self):
2711
"D-Bus method"
2712
return dbus.Array(c.dbus_object_path
2713
for c in
2714
tcp_server.clients.itervalues())
2715
2716
@dbus.service.method(_interface,
2717
out_signature="a{oa{sv}}")
2718
def GetAllClientsWithProperties(self):
2719
"D-Bus method"
2720
return dbus.Dictionary(
2721
((c.dbus_object_path, c.GetAll(""))
2722
for c in tcp_server.clients.itervalues()),
2723
signature="oa{sv}")
2724
2725
@dbus.service.method(_interface, in_signature="o")
2726
def RemoveClient(self, object_path):
2727
"D-Bus method"
2728
for c in tcp_server.clients.itervalues():
2729
if c.dbus_object_path == object_path:
2730
del tcp_server.clients[c.name]
2731
c.remove_from_connection()
2732
# Don't signal anything except ClientRemoved
2733
c.disable(quiet=True)
2734
# Emit D-Bus signal
2735
self.ClientRemoved(object_path, c.name)
2736
return
2737
raise KeyError(object_path)
2738
2739
del _interface
2740
2741
mandos_dbus_service = MandosDBusService()
818
2742
819
2743
def cleanup():
820
2744
"Cleanup function; run on exit"
821
global group
822
# From the Avahi example code
823
if not group is None:
824
group.Free()
825
group = None
826
# End of Avahi example code
827
828
while clients:
829
client = clients.pop()
830
client.stop_hook = None
831
client.stop()
2745
service.cleanup()
2746
2747
multiprocessing.active_children()
2748
wnull.close()
2749
if not (tcp_server.clients or client_settings):
2750
return
2751
2752
# Store client before exiting. Secrets are encrypted with key
2753
# based on what config file has. If config file is
2754
# removed/edited, old secret will thus be unrecovable.
2755
clients = {}
2756
with PGPEngine() as pgp:
2757
for client in tcp_server.clients.itervalues():
2758
key = client_settings[client.name]["secret"]
2759
client.encrypted_secret = pgp.encrypt(client.secret,
2760
key)
2761
client_dict = {}
2762
2763
# A list of attributes that can not be pickled
2764
# + secret.
2765
exclude = set(("bus", "changedstate", "secret",
2766
"checker", "server_settings"))
2767
for name, typ in (inspect.getmembers
2768
(dbus.service.Object)):
2769
exclude.add(name)
2770
2771
client_dict["encrypted_secret"] = (client
2772
.encrypted_secret)
2773
for attr in client.client_structure:
2774
if attr not in exclude:
2775
client_dict[attr] = getattr(client, attr)
2776
2777
clients[client.name] = client_dict
2778
del client_settings[client.name]["secret"]
2779
2780
try:
2781
with (tempfile.NamedTemporaryFile
2782
(mode='wb', suffix=".pickle", prefix='clients-',
2783
dir=os.path.dirname(stored_state_path),
2784
delete=False)) as stored_state:
2785
pickle.dump((clients, client_settings), stored_state)
2786
tempname=stored_state.name
2787
os.rename(tempname, stored_state_path)
2788
except (IOError, OSError) as e:
2789
if not debug:
2790
try:
2791
os.remove(tempname)
2792
except NameError:
2793
pass
2794
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2795
logger.warning("Could not save persistent state: {0}"
2796
.format(os.strerror(e.errno)))
2797
else:
2798
logger.warning("Could not save persistent state:",
2799
exc_info=e)
2800
raise
2801
2802
# Delete all clients, and settings from config
2803
while tcp_server.clients:
2804
name, client = tcp_server.clients.popitem()
2805
if use_dbus:
2806
client.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
2808
client.disable(quiet=True)
2809
if use_dbus:
2810
# Emit D-Bus signal
2811
mandos_dbus_service.ClientRemoved(client
2812
.dbus_object_path,
2813
client.name)
2814
client_settings.clear()
832
2815
833
2816
atexit.register(cleanup)
834
2817
835
if not debug:
836
signal.signal(signal.SIGINT, signal.SIG_IGN)
837
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
838
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
839
840
for client in clients:
841
client.start()
842
843
tcp_server = IPv6_TCPServer((server_settings["address"],
844
server_settings["port"]),
845
tcp_handler,
846
settings=server_settings,
847
clients=clients)
2818
for client in tcp_server.clients.itervalues():
2819
if use_dbus:
2820
# Emit D-Bus signal
2821
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2822
# Need to initiate checking of clients
2823
if client.enabled:
2824
client.init_checker()
2825
2826
tcp_server.enable()
2827
tcp_server.server_activate()
2828
848
2829
# Find out what port we got
849
2830
service.port = tcp_server.socket.getsockname()[1]
850
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
851
u" scope_id %d" % tcp_server.socket.getsockname())
2831
if use_ipv6:
2832
logger.info("Now listening on address %r, port %d,"
2833
" flowinfo %d, scope_id %d",
2834
*tcp_server.socket.getsockname())
2835
else: # IPv4
2836
logger.info("Now listening on address %r, port %d",
2837
*tcp_server.socket.getsockname())
852
2838
853
2839
#service.interface = tcp_server.socket.getsockname()[3]
854
2840
855
2841
try:
856
2842
# From the Avahi example code
857
server.connect_to_signal("StateChanged", server_state_changed)
858
2843
try:
859
server_state_changed(server.GetState())
860
except dbus.exceptions.DBusException, error:
861
logger.critical(u"DBusException: %s", error)
2844
service.activate()
2845
except dbus.exceptions.DBusException as error:
2846
logger.critical("D-Bus Exception", exc_info=error)
2847
cleanup()
862
2848
sys.exit(1)
863
2849
# End of Avahi example code
864
2850
865
2851
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
866
2852
lambda *args, **kwargs:
867
tcp_server.handle_request\
868
(*args[2:], **kwargs) or True)
2853
(tcp_server.handle_request
2854
(*args[2:], **kwargs) or True))
869
2855
870
logger.debug(u"Starting main loop")
871
main_loop_started = True
2856
logger.debug("Starting main loop")
872
2857
main_loop.run()
873
except AvahiError, error:
874
logger.critical(u"AvahiError: %s" + unicode(error))
2858
except AvahiError as error:
2859
logger.critical("Avahi Error", exc_info=error)
2860
cleanup()
875
2861
sys.exit(1)
876
2862
except KeyboardInterrupt:
877
2863
if debug:
878
print
2864
print("", file=sys.stderr)
2865
logger.debug("Server received KeyboardInterrupt")
2866
logger.debug("Server exiting")
2867
# Must run before the D-Bus bus name gets deregistered
2868
cleanup()
879
2869
880
2870
if __name__ == '__main__':
881
2871
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0