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- Committer: Teddy Hogeborn
- Date: 2012-06-23 00:58:49 UTC
- Revision ID: teddy@recompile.se-20120623005849-02wj82cng433rt2k
* clients.conf: Convert all time intervals to new RFC 3339 syntax.
* mandos: All client options for time intervals now take an RFC 3339
duration.
(rfc3339_duration_to_delta): New function.
(string_to_delta): Try rfc3339_duration_to_delta first.
* mandos-clients.conf.xml (OPTIONS/timeout): Document new format.
(EXAMPLE): Update to new interval format.
(SEE ALSO): Reference RFC 3339.
* mandos: All client options for time intervals now take an RFC 3339
duration.
(rfc3339_duration_to_delta): New function.
(string_to_delta): Try rfc3339_duration_to_delta first.
* mandos-clients.conf.xml (OPTIONS/timeout): Document new format.
(EXAMPLE): Update to new interval format.
(SEE ALSO): Reference RFC 3339.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files removed:
- debian/mandos-client.config
- 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 © 2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
58
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
59
72
60
73
import dbus
74
import dbus.service
61
75
import gobject
62
76
import avahi
63
77
from dbus.mainloop.glib import DBusGMainLoop
64
78
import ctypes
65
66
version = "1.0"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
79
import ctypes.util
80
import xml.dom.minidom
81
import inspect
82
import GnuPGInterface
83
84
try:
85
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
86
except AttributeError:
87
try:
88
from IN import SO_BINDTODEVICE
89
except ImportError:
90
SO_BINDTODEVICE = None
91
92
version = "1.6.0"
93
stored_state_file = "clients.pickle"
94
95
logger = logging.getLogger()
96
syslogger = (logging.handlers.SysLogHandler
97
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
98
address = str("/dev/log")))
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(str("16s16x"),
111
interface))
112
interface_index = struct.unpack(str("I"),
113
ifreq[16:20])[0]
114
return interface_index
115
116
117
def initlogger(debug, level=logging.WARNING):
118
"""init logger and add loglevel"""
119
120
syslogger.setFormatter(logging.Formatter
121
('Mandos [%(process)d]: %(levelname)s:'
122
' %(message)s'))
123
logger.addHandler(syslogger)
124
125
if debug:
126
console = logging.StreamHandler()
127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
128
' [%(process)d]:'
129
' %(levelname)s:'
130
' %(message)s'))
131
logger.addHandler(console)
132
logger.setLevel(level)
133
134
135
class PGPError(Exception):
136
"""Exception if encryption/decryption fails"""
137
pass
138
139
140
class PGPEngine(object):
141
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
def __init__(self):
143
self.gnupg = GnuPGInterface.GnuPG()
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupg = GnuPGInterface.GnuPG()
146
self.gnupg.options.meta_interactive = False
147
self.gnupg.options.homedir = self.tempdir
148
self.gnupg.options.extra_args.extend(['--force-mdc',
149
'--quiet',
150
'--no-use-agent'])
151
152
def __enter__(self):
153
return self
154
155
def __exit__(self, exc_type, exc_value, traceback):
156
self._cleanup()
157
return False
158
159
def __del__(self):
160
self._cleanup()
161
162
def _cleanup(self):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
166
topdown = False):
167
for filename in files:
168
os.remove(os.path.join(root, filename))
169
for dirname in dirs:
170
os.rmdir(os.path.join(root, dirname))
171
# Remove tempdir
172
os.rmdir(self.tempdir)
173
self.tempdir = None
174
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
return b"mandos" + binascii.hexlify(password)
179
180
def encrypt(self, data, password):
181
self.gnupg.passphrase = self.password_encode(password)
182
with open(os.devnull, "w") as devnull:
183
try:
184
proc = self.gnupg.run(['--symmetric'],
185
create_fhs=['stdin', 'stdout'],
186
attach_fhs={'stderr': devnull})
187
with contextlib.closing(proc.handles['stdin']) as f:
188
f.write(data)
189
with contextlib.closing(proc.handles['stdout']) as f:
190
ciphertext = f.read()
191
proc.wait()
192
except IOError as e:
193
raise PGPError(e)
194
self.gnupg.passphrase = None
195
return ciphertext
196
197
def decrypt(self, data, password):
198
self.gnupg.passphrase = self.password_encode(password)
199
with open(os.devnull, "w") as devnull:
200
try:
201
proc = self.gnupg.run(['--decrypt'],
202
create_fhs=['stdin', 'stdout'],
203
attach_fhs={'stderr': devnull})
204
with contextlib.closing(proc.handles['stdin']) as f:
205
f.write(data)
206
with contextlib.closing(proc.handles['stdout']) as f:
207
decrypted_plaintext = f.read()
208
proc.wait()
209
except IOError as e:
210
raise PGPError(e)
211
self.gnupg.passphrase = None
212
return decrypted_plaintext
213
80
214
81
215
class AvahiError(Exception):
82
def __init__(self, value):
216
def __init__(self, value, *args, **kwargs):
83
217
self.value = value
84
def __str__(self):
85
return repr(self.value)
218
super(AvahiError, self).__init__(value, *args, **kwargs)
219
def __unicode__(self):
220
return unicode(repr(self.value))
86
221
87
222
class AvahiServiceError(AvahiError):
88
223
pass
93
228
94
229
class AvahiService(object):
95
230
"""An Avahi (Zeroconf) service.
231
96
232
Attributes:
97
233
interface: integer; avahi.IF_UNSPEC or an interface index.
98
234
Used to optionally bind to the specified interface.
106
242
max_renames: integer; maximum number of renames
107
243
rename_count: integer; counter so we only rename after collisions
108
244
a sensible number of times
245
group: D-Bus Entry Group
246
server: D-Bus Server
247
bus: dbus.SystemBus()
109
248
"""
249
110
250
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
251
servicetype = None, port = None, TXT = None,
252
domain = "", host = "", max_renames = 32768,
253
protocol = avahi.PROTO_UNSPEC, bus = None):
113
254
self.interface = interface
114
255
self.name = name
115
self.type = type
256
self.type = servicetype
116
257
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
258
self.TXT = TXT if TXT is not None else []
121
259
self.domain = domain
122
260
self.host = host
123
261
self.rename_count = 0
124
262
self.max_renames = max_renames
263
self.protocol = protocol
264
self.group = None # our entry group
265
self.server = None
266
self.bus = bus
267
self.entry_group_state_changed_match = None
268
125
269
def rename(self):
126
270
"""Derived from the Avahi example code"""
127
271
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
272
logger.critical("No suitable Zeroconf service name found"
273
" after %i retries, exiting.",
274
self.rename_count)
131
275
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
276
self.name = unicode(self.server
277
.GetAlternativeServiceName(self.name))
278
logger.info("Changing Zeroconf service name to %r ...",
279
self.name)
138
280
self.remove()
139
self.add()
281
try:
282
self.add()
283
except dbus.exceptions.DBusException as error:
284
logger.critical("D-Bus Exception", exc_info=error)
285
self.cleanup()
286
os._exit(1)
140
287
self.rename_count += 1
288
141
289
def remove(self):
142
290
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
291
if self.entry_group_state_changed_match is not None:
292
self.entry_group_state_changed_match.remove()
293
self.entry_group_state_changed_match = None
294
if self.group is not None:
295
self.group.Reset()
296
145
297
def add(self):
146
298
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
299
self.remove()
300
if self.group is None:
301
self.group = dbus.Interface(
302
self.bus.get_object(avahi.DBUS_NAME,
303
self.server.EntryGroupNew()),
304
avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
self.entry_group_state_changed_match = (
306
self.group.connect_to_signal(
307
'StateChanged', self.entry_group_state_changed))
308
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
self.name, self.type)
310
self.group.AddService(
311
self.interface,
312
self.protocol,
313
dbus.UInt32(0), # flags
314
self.name, self.type,
315
self.domain, self.host,
316
dbus.UInt16(self.port),
317
avahi.string_array_to_txt_array(self.TXT))
318
self.group.Commit()
319
320
def entry_group_state_changed(self, state, error):
321
"""Derived from the Avahi example code"""
322
logger.debug("Avahi entry group state change: %i", state)
323
324
if state == avahi.ENTRY_GROUP_ESTABLISHED:
325
logger.debug("Zeroconf service established.")
326
elif state == avahi.ENTRY_GROUP_COLLISION:
327
logger.info("Zeroconf service name collision.")
328
self.rename()
329
elif state == avahi.ENTRY_GROUP_FAILURE:
330
logger.critical("Avahi: Error in group state changed %s",
331
unicode(error))
332
raise AvahiGroupError("State changed: {0!s}"
333
.format(error))
334
335
def cleanup(self):
336
"""Derived from the Avahi example code"""
337
if self.group is not None:
338
try:
339
self.group.Free()
340
except (dbus.exceptions.UnknownMethodException,
341
dbus.exceptions.DBusException):
342
pass
343
self.group = None
344
self.remove()
345
346
def server_state_changed(self, state, error=None):
347
"""Derived from the Avahi example code"""
348
logger.debug("Avahi server state change: %i", state)
349
bad_states = { avahi.SERVER_INVALID:
350
"Zeroconf server invalid",
351
avahi.SERVER_REGISTERING: None,
352
avahi.SERVER_COLLISION:
353
"Zeroconf server name collision",
354
avahi.SERVER_FAILURE:
355
"Zeroconf server failure" }
356
if state in bad_states:
357
if bad_states[state] is not None:
358
if error is None:
359
logger.error(bad_states[state])
360
else:
361
logger.error(bad_states[state] + ": %r", error)
362
self.cleanup()
363
elif state == avahi.SERVER_RUNNING:
364
self.add()
365
else:
366
if error is None:
367
logger.debug("Unknown state: %r", state)
368
else:
369
logger.debug("Unknown state: %r: %r", state, error)
370
371
def activate(self):
372
"""Derived from the Avahi example code"""
373
if self.server is None:
374
self.server = dbus.Interface(
375
self.bus.get_object(avahi.DBUS_NAME,
376
avahi.DBUS_PATH_SERVER,
377
follow_name_owner_changes=True),
378
avahi.DBUS_INTERFACE_SERVER)
379
self.server.connect_to_signal("StateChanged",
380
self.server_state_changed)
381
self.server_state_changed(self.server.GetState())
382
383
384
class AvahiServiceToSyslog(AvahiService):
385
def rename(self):
386
"""Add the new name to the syslog messages"""
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
391
.format(self.name)))
392
return ret
393
394
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
170
400
171
401
172
402
class Client(object):
173
403
"""A representation of a client host served by this server.
404
174
405
Attributes:
175
name: string; from the config file, used in log messages
406
approved: bool(); 'None' if not yet approved/disapproved
407
approval_delay: datetime.timedelta(); Time to wait for approval
408
approval_duration: datetime.timedelta(); Duration of one approval
409
checker: subprocess.Popen(); a running checker process used
410
to see if the client lives.
411
'None' if no process is running.
412
checker_callback_tag: a gobject event source tag, or None
413
checker_command: string; External command which is run to check
414
if client lives. %() expansions are done at
415
runtime with vars(self) as dict, so that for
416
instance %(name)s can be used in the command.
417
checker_initiator_tag: a gobject event source tag, or None
418
created: datetime.datetime(); (UTC) object creation
419
client_structure: Object describing what attributes a client has
420
and is used for storing the client at exit
421
current_checker_command: string; current running checker_command
422
disable_initiator_tag: a gobject event source tag, or None
423
enabled: bool()
176
424
fingerprint: string (40 or 32 hexadecimal digits); used to
177
425
uniquely identify the client
178
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
189
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
191
checker_callback_tag: - '' -
192
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
194
runtime with vars(self) as dict, so that for
195
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
426
host: string; available for use by the checker command
427
interval: datetime.timedelta(); How often to start a new checker
428
last_approval_request: datetime.datetime(); (UTC) or None
429
last_checked_ok: datetime.datetime(); (UTC) or None
430
last_checker_status: integer between 0 and 255 reflecting exit
431
status of last checker. -1 reflects crashed
432
checker, -2 means no checker completed yet.
433
last_enabled: datetime.datetime(); (UTC) or None
434
name: string; from the config file, used in log messages and
435
D-Bus identifiers
436
secret: bytestring; sent verbatim (over TLS) to client
437
timeout: datetime.timedelta(); How long from last_checked_ok
438
until this client is disabled
439
extended_timeout: extra long timeout when secret has been sent
440
runtime_expansions: Allowed attributes for runtime expansion.
441
expires: datetime.datetime(); time (UTC) when a client will be
442
disabled, or None
201
443
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
444
445
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
449
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
461
def timeout_milliseconds(self):
462
"Return the 'timeout' attribute in milliseconds"
463
return timedelta_to_milliseconds(self.timeout)
464
465
def extended_timeout_milliseconds(self):
466
"Return the 'extended_timeout' attribute in milliseconds"
467
return timedelta_to_milliseconds(self.extended_timeout)
468
469
def interval_milliseconds(self):
470
"Return the 'interval' attribute in milliseconds"
471
return timedelta_to_milliseconds(self.interval)
472
473
def approval_delay_milliseconds(self):
474
return timedelta_to_milliseconds(self.approval_delay)
475
476
@staticmethod
477
def config_parser(config):
478
"""Construct a new dict of client settings of this form:
479
{ client_name: {setting_name: value, ...}, ...}
480
with exceptions for any special settings as defined above.
481
NOTE: Must be a pure function. Must return the same result
482
value given the same arguments.
483
"""
484
settings = {}
485
for client_name in config.sections():
486
section = dict(config.items(client_name))
487
client = settings[client_name] = {}
488
489
client["host"] = section["host"]
490
# Reformat values from string types to Python types
491
client["approved_by_default"] = config.getboolean(
492
client_name, "approved_by_default")
493
client["enabled"] = config.getboolean(client_name,
494
"enabled")
495
496
client["fingerprint"] = (section["fingerprint"].upper()
497
.replace(" ", ""))
498
if "secret" in section:
499
client["secret"] = section["secret"].decode("base64")
500
elif "secfile" in section:
501
with open(os.path.expanduser(os.path.expandvars
502
(section["secfile"])),
503
"rb") as secfile:
504
client["secret"] = secfile.read()
505
else:
506
raise TypeError("No secret or secfile for section {0}"
507
.format(section))
508
client["timeout"] = string_to_delta(section["timeout"])
509
client["extended_timeout"] = string_to_delta(
510
section["extended_timeout"])
511
client["interval"] = string_to_delta(section["interval"])
512
client["approval_delay"] = string_to_delta(
513
section["approval_delay"])
514
client["approval_duration"] = string_to_delta(
515
section["approval_duration"])
516
client["checker_command"] = section["checker"]
517
client["last_approval_request"] = None
518
client["last_checked_ok"] = None
519
client["last_checker_status"] = -2
520
521
return settings
522
523
def __init__(self, settings, name = None):
229
524
self.name = name
230
logger.debug(u"Creating client %r", self.name)
525
# adding all client settings
526
for setting, value in settings.iteritems():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
535
else:
536
self.last_enabled = None
537
self.expires = None
538
539
logger.debug("Creating client %r", self.name)
231
540
# Uppercase and remove spaces from fingerprint for later
232
541
# comparison purposes with return value from the fingerprint()
233
542
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
543
logger.debug(" Fingerprint: %s", self.fingerprint)
544
self.created = settings.get("created",
545
datetime.datetime.utcnow())
546
547
# attributes specific for this server instance
252
548
self.checker = None
253
549
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
550
self.disable_initiator_tag = None
255
551
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
552
self.current_checker_command = None
553
self.approved = None
554
self.approvals_pending = 0
555
self.changedstate = (multiprocessing_manager
556
.Condition(multiprocessing_manager
557
.Lock()))
558
self.client_structure = [attr for attr in
559
self.__dict__.iterkeys()
560
if not attr.startswith("_")]
561
self.client_structure.append("client_structure")
562
563
for name, t in inspect.getmembers(type(self),
564
lambda obj:
565
isinstance(obj,
566
property)):
567
if not name.startswith("_"):
568
self.client_structure.append(name)
569
570
# Send notice to process children that client state has changed
571
def send_changedstate(self):
572
with self.changedstate:
573
self.changedstate.notify_all()
574
575
def enable(self):
258
576
"""Start this client's checker and timeout hooks"""
577
if getattr(self, "enabled", False):
578
# Already enabled
579
return
580
self.expires = datetime.datetime.utcnow() + self.timeout
581
self.enabled = True
582
self.last_enabled = datetime.datetime.utcnow()
583
self.init_checker()
584
self.send_changedstate()
585
586
def disable(self, quiet=True):
587
"""Disable this client."""
588
if not getattr(self, "enabled", False):
589
return False
590
if not quiet:
591
logger.info("Disabling client %s", self.name)
592
if getattr(self, "disable_initiator_tag", None) is not None:
593
gobject.source_remove(self.disable_initiator_tag)
594
self.disable_initiator_tag = None
595
self.expires = None
596
if getattr(self, "checker_initiator_tag", None) is not None:
597
gobject.source_remove(self.checker_initiator_tag)
598
self.checker_initiator_tag = None
599
self.stop_checker()
600
self.enabled = False
601
if not quiet:
602
self.send_changedstate()
603
# Do not run this again if called by a gobject.timeout_add
604
return False
605
606
def __del__(self):
607
self.disable()
608
609
def init_checker(self):
259
610
# Schedule a new checker to be started an 'interval' from now,
260
611
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
612
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = (gobject.timeout_add
615
(self.interval_milliseconds(),
616
self.start_checker))
617
# Schedule a disable() when 'timeout' has passed
618
if self.disable_initiator_tag is not None:
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = (gobject.timeout_add
621
(self.timeout_milliseconds(),
622
self.disable))
264
623
# Also start a new checker *right now*.
265
624
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
279
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
284
gobject.source_remove(self.checker_initiator_tag)
285
self.checker_initiator_tag = None
286
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
289
# Do not run this again if called by a gobject.timeout_add
290
return False
291
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
625
626
def checker_callback(self, pid, condition, command):
295
627
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
628
self.checker_callback_tag = None
298
629
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
632
if self.last_checker_status == 0:
633
logger.info("Checker for %(name)s succeeded",
634
vars(self))
635
self.checked_ok()
636
else:
637
logger.info("Checker for %(name)s failed",
638
vars(self))
639
else:
640
self.last_checker_status = -1
641
logger.warning("Checker for %(name)s crashed?",
310
642
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
643
644
def checked_ok(self):
645
"""Assert that the client has been seen, alive and well."""
646
self.last_checked_ok = datetime.datetime.utcnow()
647
self.last_checker_status = 0
648
self.bump_timeout()
649
650
def bump_timeout(self, timeout=None):
651
"""Bump up the timeout for this client."""
652
if timeout is None:
653
timeout = self.timeout
654
if self.disable_initiator_tag is not None:
655
gobject.source_remove(self.disable_initiator_tag)
656
self.disable_initiator_tag = None
657
if getattr(self, "enabled", False):
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
661
self.expires = datetime.datetime.utcnow() + timeout
662
663
def need_approval(self):
664
self.last_approval_request = datetime.datetime.utcnow()
665
314
666
def start_checker(self):
315
667
"""Start a new checker subprocess if one is not running.
668
316
669
If a checker already exists, leave it running and do
317
670
nothing."""
318
671
# The reason for not killing a running checker is that if we
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
672
# did that, and if a checker (for some reason) started running
673
# slowly and taking more than 'interval' time, then the client
674
# would inevitably timeout, since no checker would get a
675
# chance to run to completion. If we instead leave running
323
676
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
677
# than 'timeout' for the client to be disabled, which is as it
678
# should be.
679
680
# If a checker exists, make sure it is not a zombie
681
try:
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
686
raise error
687
else:
688
if pid:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
693
# Start a new checker if needed
326
694
if self.checker is None:
327
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
330
except TypeError:
331
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
333
for key, val in
334
vars(self).iteritems())
335
try:
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
340
return True # Try again later
341
try:
342
logger.info(u"Starting checker %r for %s",
695
# Escape attributes for the shell
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
698
for attr in
699
self.runtime_expansions)
700
try:
701
command = self.checker_command % escaped_attrs
702
except TypeError as error:
703
logger.error('Could not format string "%s"',
704
self.checker_command, exc_info=error)
705
return True # Try again later
706
self.current_checker_command = command
707
try:
708
logger.info("Starting checker %r for %s",
343
709
command, self.name)
344
710
# We don't need to redirect stdout and stderr, since
345
711
# in normal mode, that is already done by daemon(),
348
714
self.checker = subprocess.Popen(command,
349
715
close_fds=True,
350
716
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
356
error)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
self.checker_callback_tag = (gobject.child_watch_add
721
(self.checker.pid,
722
self.checker_callback,
723
data=command))
724
# The checker may have completed before the gobject
725
# watch was added. Check for this.
726
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
if pid:
728
gobject.source_remove(self.checker_callback_tag)
729
self.checker_callback(pid, status, command)
357
730
# Re-run this periodically if run by gobject.timeout_add
358
731
return True
732
359
733
def stop_checker(self):
360
734
"""Force the checker process, if any, to stop."""
361
735
if self.checker_callback_tag:
363
737
self.checker_callback_tag = None
364
738
if getattr(self, "checker", None) is None:
365
739
return
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
740
logger.debug("Stopping checker for %(name)s", vars(self))
367
741
try:
368
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
742
self.checker.terminate()
743
#time.sleep(0.5)
370
744
#if self.checker.poll() is None:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
745
# self.checker.kill()
746
except OSError as error:
373
747
if error.errno != errno.ESRCH: # No such process
374
748
raise
375
749
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
750
751
752
def dbus_service_property(dbus_interface, signature="v",
753
access="readwrite", byte_arrays=False):
754
"""Decorators for marking methods of a DBusObjectWithProperties to
755
become properties on the D-Bus.
756
757
The decorated method will be called with no arguments by "Get"
758
and with one argument by "Set".
759
760
The parameters, where they are supported, are the same as
761
dbus.service.method, except there is only "signature", since the
762
type from Get() and the type sent to Set() is the same.
763
"""
764
# Encoding deeply encoded byte arrays is not supported yet by the
765
# "Set" method, so we fail early here:
766
if byte_arrays and signature != "ay":
767
raise ValueError("Byte arrays not supported for non-'ay'"
768
" signature {0!r}".format(signature))
769
def decorator(func):
770
func._dbus_is_property = True
771
func._dbus_interface = dbus_interface
772
func._dbus_signature = signature
773
func._dbus_access = access
774
func._dbus_name = func.__name__
775
if func._dbus_name.endswith("_dbus_property"):
776
func._dbus_name = func._dbus_name[:-14]
777
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
778
return func
779
return decorator
780
781
782
def dbus_interface_annotations(dbus_interface):
783
"""Decorator for marking functions returning interface annotations
784
785
Usage:
786
787
@dbus_interface_annotations("org.example.Interface")
788
def _foo(self): # Function name does not matter
789
return {"org.freedesktop.DBus.Deprecated": "true",
790
"org.freedesktop.DBus.Property.EmitsChangedSignal":
791
"false"}
792
"""
793
def decorator(func):
794
func._dbus_is_interface = True
795
func._dbus_interface = dbus_interface
796
func._dbus_name = dbus_interface
797
return func
798
return decorator
799
800
801
def dbus_annotations(annotations):
802
"""Decorator to annotate D-Bus methods, signals or properties
803
Usage:
804
805
@dbus_service_property("org.example.Interface", signature="b",
806
access="r")
807
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
808
"org.freedesktop.DBus.Property."
809
"EmitsChangedSignal": "false"})
810
def Property_dbus_property(self):
811
return dbus.Boolean(False)
812
"""
813
def decorator(func):
814
func._dbus_annotations = annotations
815
return func
816
return decorator
817
818
819
class DBusPropertyException(dbus.exceptions.DBusException):
820
"""A base class for D-Bus property-related exceptions
821
"""
822
def __unicode__(self):
823
return unicode(str(self))
824
825
826
class DBusPropertyAccessException(DBusPropertyException):
827
"""A property's access permissions disallows an operation.
828
"""
829
pass
830
831
832
class DBusPropertyNotFound(DBusPropertyException):
833
"""An attempt was made to access a non-existing property.
834
"""
835
pass
836
837
838
class DBusObjectWithProperties(dbus.service.Object):
839
"""A D-Bus object with properties.
840
841
Classes inheriting from this can use the dbus_service_property
842
decorator to expose methods as D-Bus properties. It exposes the
843
standard Get(), Set(), and GetAll() methods on the D-Bus.
844
"""
845
846
@staticmethod
847
def _is_dbus_thing(thing):
848
"""Returns a function testing if an attribute is a D-Bus thing
849
850
If called like _is_dbus_thing("method") it returns a function
851
suitable for use as predicate to inspect.getmembers().
852
"""
853
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
854
False)
855
856
def _get_all_dbus_things(self, thing):
857
"""Returns a generator of (name, attribute) pairs
858
"""
859
return ((getattr(athing.__get__(self), "_dbus_name",
860
name),
861
athing.__get__(self))
862
for cls in self.__class__.__mro__
863
for name, athing in
864
inspect.getmembers(cls,
865
self._is_dbus_thing(thing)))
866
867
def _get_dbus_property(self, interface_name, property_name):
868
"""Returns a bound method if one exists which is a D-Bus
869
property with the specified name and interface.
870
"""
871
for cls in self.__class__.__mro__:
872
for name, value in (inspect.getmembers
873
(cls,
874
self._is_dbus_thing("property"))):
875
if (value._dbus_name == property_name
876
and value._dbus_interface == interface_name):
877
return value.__get__(self)
878
879
# No such property
880
raise DBusPropertyNotFound(self.dbus_object_path + ":"
881
+ interface_name + "."
882
+ property_name)
883
884
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
885
out_signature="v")
886
def Get(self, interface_name, property_name):
887
"""Standard D-Bus property Get() method, see D-Bus standard.
888
"""
889
prop = self._get_dbus_property(interface_name, property_name)
890
if prop._dbus_access == "write":
891
raise DBusPropertyAccessException(property_name)
892
value = prop()
893
if not hasattr(value, "variant_level"):
894
return value
895
return type(value)(value, variant_level=value.variant_level+1)
896
897
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
898
def Set(self, interface_name, property_name, value):
899
"""Standard D-Bus property Set() method, see D-Bus standard.
900
"""
901
prop = self._get_dbus_property(interface_name, property_name)
902
if prop._dbus_access == "read":
903
raise DBusPropertyAccessException(property_name)
904
if prop._dbus_get_args_options["byte_arrays"]:
905
# The byte_arrays option is not supported yet on
906
# signatures other than "ay".
907
if prop._dbus_signature != "ay":
908
raise ValueError
909
value = dbus.ByteArray(b''.join(chr(byte)
910
for byte in value))
911
prop(value)
912
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
914
out_signature="a{sv}")
915
def GetAll(self, interface_name):
916
"""Standard D-Bus property GetAll() method, see D-Bus
917
standard.
918
919
Note: Will not include properties with access="write".
920
"""
921
properties = {}
922
for name, prop in self._get_all_dbus_things("property"):
923
if (interface_name
924
and interface_name != prop._dbus_interface):
925
# Interface non-empty but did not match
926
continue
927
# Ignore write-only properties
928
if prop._dbus_access == "write":
929
continue
930
value = prop()
931
if not hasattr(value, "variant_level"):
932
properties[name] = value
933
continue
934
properties[name] = type(value)(value, variant_level=
935
value.variant_level+1)
936
return dbus.Dictionary(properties, signature="sv")
937
938
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
939
out_signature="s",
940
path_keyword='object_path',
941
connection_keyword='connection')
942
def Introspect(self, object_path, connection):
943
"""Overloading of standard D-Bus method.
944
945
Inserts property tags and interface annotation tags.
946
"""
947
xmlstring = dbus.service.Object.Introspect(self, object_path,
948
connection)
949
try:
950
document = xml.dom.minidom.parseString(xmlstring)
951
def make_tag(document, name, prop):
952
e = document.createElement("property")
953
e.setAttribute("name", name)
954
e.setAttribute("type", prop._dbus_signature)
955
e.setAttribute("access", prop._dbus_access)
956
return e
957
for if_tag in document.getElementsByTagName("interface"):
958
# Add property tags
959
for tag in (make_tag(document, name, prop)
960
for name, prop
961
in self._get_all_dbus_things("property")
962
if prop._dbus_interface
963
== if_tag.getAttribute("name")):
964
if_tag.appendChild(tag)
965
# Add annotation tags
966
for typ in ("method", "signal", "property"):
967
for tag in if_tag.getElementsByTagName(typ):
968
annots = dict()
969
for name, prop in (self.
970
_get_all_dbus_things(typ)):
971
if (name == tag.getAttribute("name")
972
and prop._dbus_interface
973
== if_tag.getAttribute("name")):
974
annots.update(getattr
975
(prop,
976
"_dbus_annotations",
977
{}))
978
for name, value in annots.iteritems():
979
ann_tag = document.createElement(
980
"annotation")
981
ann_tag.setAttribute("name", name)
982
ann_tag.setAttribute("value", value)
983
tag.appendChild(ann_tag)
984
# Add interface annotation tags
985
for annotation, value in dict(
986
itertools.chain.from_iterable(
987
annotations().iteritems()
988
for name, annotations in
989
self._get_all_dbus_things("interface")
990
if name == if_tag.getAttribute("name")
991
)).iteritems():
992
ann_tag = document.createElement("annotation")
993
ann_tag.setAttribute("name", annotation)
994
ann_tag.setAttribute("value", value)
995
if_tag.appendChild(ann_tag)
996
# Add the names to the return values for the
997
# "org.freedesktop.DBus.Properties" methods
998
if (if_tag.getAttribute("name")
999
== "org.freedesktop.DBus.Properties"):
1000
for cn in if_tag.getElementsByTagName("method"):
1001
if cn.getAttribute("name") == "Get":
1002
for arg in cn.getElementsByTagName("arg"):
1003
if (arg.getAttribute("direction")
1004
== "out"):
1005
arg.setAttribute("name", "value")
1006
elif cn.getAttribute("name") == "GetAll":
1007
for arg in cn.getElementsByTagName("arg"):
1008
if (arg.getAttribute("direction")
1009
== "out"):
1010
arg.setAttribute("name", "props")
1011
xmlstring = document.toxml("utf-8")
1012
document.unlink()
1013
except (AttributeError, xml.dom.DOMException,
1014
xml.parsers.expat.ExpatError) as error:
1015
logger.error("Failed to override Introspection method",
1016
exc_info=error)
1017
return xmlstring
1018
1019
1020
def datetime_to_dbus(dt, variant_level=0):
1021
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
if dt is None:
1023
return dbus.String("", variant_level = variant_level)
1024
return dbus.String(dt.isoformat(),
1025
variant_level=variant_level)
1026
1027
1028
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1029
"""A class decorator; applied to a subclass of
1030
dbus.service.Object, it will add alternate D-Bus attributes with
1031
interface names according to the "alt_interface_names" mapping.
1032
Usage:
1033
1034
@alternate_dbus_interfaces({"org.example.Interface":
1035
"net.example.AlternateInterface"})
1036
class SampleDBusObject(dbus.service.Object):
1037
@dbus.service.method("org.example.Interface")
1038
def SampleDBusMethod():
1039
pass
1040
1041
The above "SampleDBusMethod" on "SampleDBusObject" will be
1042
reachable via two interfaces: "org.example.Interface" and
1043
"net.example.AlternateInterface", the latter of which will have
1044
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1045
"true", unless "deprecate" is passed with a False value.
1046
1047
This works for methods and signals, and also for D-Bus properties
1048
(from DBusObjectWithProperties) and interfaces (from the
1049
dbus_interface_annotations decorator).
1050
"""
1051
def wrapper(cls):
1052
for orig_interface_name, alt_interface_name in (
1053
alt_interface_names.iteritems()):
1054
attr = {}
1055
interface_names = set()
1056
# Go though all attributes of the class
1057
for attrname, attribute in inspect.getmembers(cls):
1058
# Ignore non-D-Bus attributes, and D-Bus attributes
1059
# with the wrong interface name
1060
if (not hasattr(attribute, "_dbus_interface")
1061
or not attribute._dbus_interface
1062
.startswith(orig_interface_name)):
1063
continue
1064
# Create an alternate D-Bus interface name based on
1065
# the current name
1066
alt_interface = (attribute._dbus_interface
1067
.replace(orig_interface_name,
1068
alt_interface_name))
1069
interface_names.add(alt_interface)
1070
# Is this a D-Bus signal?
1071
if getattr(attribute, "_dbus_is_signal", False):
1072
# Extract the original non-method function by
1073
# black magic
1074
nonmethod_func = (dict(
1075
zip(attribute.func_code.co_freevars,
1076
attribute.__closure__))["func"]
1077
.cell_contents)
1078
# Create a new, but exactly alike, function
1079
# object, and decorate it to be a new D-Bus signal
1080
# with the alternate D-Bus interface name
1081
new_function = (dbus.service.signal
1082
(alt_interface,
1083
attribute._dbus_signature)
1084
(types.FunctionType(
1085
nonmethod_func.func_code,
1086
nonmethod_func.func_globals,
1087
nonmethod_func.func_name,
1088
nonmethod_func.func_defaults,
1089
nonmethod_func.func_closure)))
1090
# Copy annotations, if any
1091
try:
1092
new_function._dbus_annotations = (
1093
dict(attribute._dbus_annotations))
1094
except AttributeError:
1095
pass
1096
# Define a creator of a function to call both the
1097
# original and alternate functions, so both the
1098
# original and alternate signals gets sent when
1099
# the function is called
1100
def fixscope(func1, func2):
1101
"""This function is a scope container to pass
1102
func1 and func2 to the "call_both" function
1103
outside of its arguments"""
1104
def call_both(*args, **kwargs):
1105
"""This function will emit two D-Bus
1106
signals by calling func1 and func2"""
1107
func1(*args, **kwargs)
1108
func2(*args, **kwargs)
1109
return call_both
1110
# Create the "call_both" function and add it to
1111
# the class
1112
attr[attrname] = fixscope(attribute, new_function)
1113
# Is this a D-Bus method?
1114
elif getattr(attribute, "_dbus_is_method", False):
1115
# Create a new, but exactly alike, function
1116
# object. Decorate it to be a new D-Bus method
1117
# with the alternate D-Bus interface name. Add it
1118
# to the class.
1119
attr[attrname] = (dbus.service.method
1120
(alt_interface,
1121
attribute._dbus_in_signature,
1122
attribute._dbus_out_signature)
1123
(types.FunctionType
1124
(attribute.func_code,
1125
attribute.func_globals,
1126
attribute.func_name,
1127
attribute.func_defaults,
1128
attribute.func_closure)))
1129
# Copy annotations, if any
1130
try:
1131
attr[attrname]._dbus_annotations = (
1132
dict(attribute._dbus_annotations))
1133
except AttributeError:
1134
pass
1135
# Is this a D-Bus property?
1136
elif getattr(attribute, "_dbus_is_property", False):
1137
# Create a new, but exactly alike, function
1138
# object, and decorate it to be a new D-Bus
1139
# property with the alternate D-Bus interface
1140
# name. Add it to the class.
1141
attr[attrname] = (dbus_service_property
1142
(alt_interface,
1143
attribute._dbus_signature,
1144
attribute._dbus_access,
1145
attribute
1146
._dbus_get_args_options
1147
["byte_arrays"])
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus interface?
1161
elif getattr(attribute, "_dbus_is_interface", False):
1162
# Create a new, but exactly alike, function
1163
# object. Decorate it to be a new D-Bus interface
1164
# with the alternate D-Bus interface name. Add it
1165
# to the class.
1166
attr[attrname] = (dbus_interface_annotations
1167
(alt_interface)
1168
(types.FunctionType
1169
(attribute.func_code,
1170
attribute.func_globals,
1171
attribute.func_name,
1172
attribute.func_defaults,
1173
attribute.func_closure)))
1174
if deprecate:
1175
# Deprecate all alternate interfaces
1176
iname="_AlternateDBusNames_interface_annotation{0}"
1177
for interface_name in interface_names:
1178
@dbus_interface_annotations(interface_name)
1179
def func(self):
1180
return { "org.freedesktop.DBus.Deprecated":
1181
"true" }
1182
# Find an unused name
1183
for aname in (iname.format(i)
1184
for i in itertools.count()):
1185
if aname not in attr:
1186
attr[aname] = func
1187
break
1188
if interface_names:
1189
# Replace the class with a new subclass of it with
1190
# methods, signals, etc. as created above.
1191
cls = type(b"{0}Alternate".format(cls.__name__),
1192
(cls,), attr)
1193
return cls
1194
return wrapper
1195
1196
1197
@alternate_dbus_interfaces({"se.recompile.Mandos":
1198
"se.bsnet.fukt.Mandos"})
1199
class ClientDBus(Client, DBusObjectWithProperties):
1200
"""A Client class using D-Bus
1201
1202
Attributes:
1203
dbus_object_path: dbus.ObjectPath
1204
bus: dbus.SystemBus()
1205
"""
1206
1207
runtime_expansions = (Client.runtime_expansions
1208
+ ("dbus_object_path",))
1209
1210
# dbus.service.Object doesn't use super(), so we can't either.
1211
1212
def __init__(self, bus = None, *args, **kwargs):
1213
self.bus = bus
1214
Client.__init__(self, *args, **kwargs)
1215
# Only now, when this client is initialized, can it show up on
1216
# the D-Bus
1217
client_object_name = unicode(self.name).translate(
1218
{ord("."): ord("_"),
1219
ord("-"): ord("_")})
1220
self.dbus_object_path = (dbus.ObjectPath
1221
("/clients/" + client_object_name))
1222
DBusObjectWithProperties.__init__(self, self.bus,
1223
self.dbus_object_path)
1224
1225
def notifychangeproperty(transform_func,
1226
dbus_name, type_func=lambda x: x,
1227
variant_level=1):
1228
""" Modify a variable so that it's a property which announces
1229
its changes to DBus.
1230
1231
transform_fun: Function that takes a value and a variant_level
1232
and transforms it to a D-Bus type.
1233
dbus_name: D-Bus name of the variable
1234
type_func: Function that transform the value before sending it
1235
to the D-Bus. Default: no transform
1236
variant_level: D-Bus variant level. Default: 1
1237
"""
1238
attrname = "_{0}".format(dbus_name)
1239
def setter(self, value):
1240
if hasattr(self, "dbus_object_path"):
1241
if (not hasattr(self, attrname) or
1242
type_func(getattr(self, attrname, None))
1243
!= type_func(value)):
1244
dbus_value = transform_func(type_func(value),
1245
variant_level
1246
=variant_level)
1247
self.PropertyChanged(dbus.String(dbus_name),
1248
dbus_value)
1249
setattr(self, attrname, value)
1250
1251
return property(lambda self: getattr(self, attrname), setter)
1252
1253
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1254
approvals_pending = notifychangeproperty(dbus.Boolean,
1255
"ApprovalPending",
1256
type_func = bool)
1257
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1258
last_enabled = notifychangeproperty(datetime_to_dbus,
1259
"LastEnabled")
1260
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1261
type_func = lambda checker:
1262
checker is not None)
1263
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1264
"LastCheckedOK")
1265
last_checker_status = notifychangeproperty(dbus.Int16,
1266
"LastCheckerStatus")
1267
last_approval_request = notifychangeproperty(
1268
datetime_to_dbus, "LastApprovalRequest")
1269
approved_by_default = notifychangeproperty(dbus.Boolean,
1270
"ApprovedByDefault")
1271
approval_delay = notifychangeproperty(dbus.UInt64,
1272
"ApprovalDelay",
1273
type_func =
1274
timedelta_to_milliseconds)
1275
approval_duration = notifychangeproperty(
1276
dbus.UInt64, "ApprovalDuration",
1277
type_func = timedelta_to_milliseconds)
1278
host = notifychangeproperty(dbus.String, "Host")
1279
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1280
type_func =
1281
timedelta_to_milliseconds)
1282
extended_timeout = notifychangeproperty(
1283
dbus.UInt64, "ExtendedTimeout",
1284
type_func = timedelta_to_milliseconds)
1285
interval = notifychangeproperty(dbus.UInt64,
1286
"Interval",
1287
type_func =
1288
timedelta_to_milliseconds)
1289
checker_command = notifychangeproperty(dbus.String, "Checker")
1290
1291
del notifychangeproperty
1292
1293
def __del__(self, *args, **kwargs):
1294
try:
1295
self.remove_from_connection()
1296
except LookupError:
1297
pass
1298
if hasattr(DBusObjectWithProperties, "__del__"):
1299
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1300
Client.__del__(self, *args, **kwargs)
1301
1302
def checker_callback(self, pid, condition, command,
1303
*args, **kwargs):
1304
self.checker_callback_tag = None
1305
self.checker = None
1306
if os.WIFEXITED(condition):
1307
exitstatus = os.WEXITSTATUS(condition)
1308
# Emit D-Bus signal
1309
self.CheckerCompleted(dbus.Int16(exitstatus),
1310
dbus.Int64(condition),
1311
dbus.String(command))
1312
else:
1313
# Emit D-Bus signal
1314
self.CheckerCompleted(dbus.Int16(-1),
1315
dbus.Int64(condition),
1316
dbus.String(command))
1317
1318
return Client.checker_callback(self, pid, condition, command,
1319
*args, **kwargs)
1320
1321
def start_checker(self, *args, **kwargs):
1322
old_checker = self.checker
1323
if self.checker is not None:
1324
old_checker_pid = self.checker.pid
1325
else:
1326
old_checker_pid = None
1327
r = Client.start_checker(self, *args, **kwargs)
1328
# Only if new checker process was started
1329
if (self.checker is not None
1330
and old_checker_pid != self.checker.pid):
1331
# Emit D-Bus signal
1332
self.CheckerStarted(self.current_checker_command)
1333
return r
1334
1335
def _reset_approved(self):
1336
self.approved = None
1337
return False
1338
1339
def approve(self, value=True):
1340
self.approved = value
1341
gobject.timeout_add(timedelta_to_milliseconds
1342
(self.approval_duration),
1343
self._reset_approved)
1344
self.send_changedstate()
1345
1346
## D-Bus methods, signals & properties
1347
_interface = "se.recompile.Mandos.Client"
1348
1349
## Interfaces
1350
1351
@dbus_interface_annotations(_interface)
1352
def _foo(self):
1353
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1354
"false"}
1355
1356
## Signals
1357
1358
# CheckerCompleted - signal
1359
@dbus.service.signal(_interface, signature="nxs")
1360
def CheckerCompleted(self, exitcode, waitstatus, command):
1361
"D-Bus signal"
1362
pass
1363
1364
# CheckerStarted - signal
1365
@dbus.service.signal(_interface, signature="s")
1366
def CheckerStarted(self, command):
1367
"D-Bus signal"
1368
pass
1369
1370
# PropertyChanged - signal
1371
@dbus.service.signal(_interface, signature="sv")
1372
def PropertyChanged(self, property, value):
1373
"D-Bus signal"
1374
pass
1375
1376
# GotSecret - signal
1377
@dbus.service.signal(_interface)
1378
def GotSecret(self):
1379
"""D-Bus signal
1380
Is sent after a successful transfer of secret from the Mandos
1381
server to mandos-client
1382
"""
1383
pass
1384
1385
# Rejected - signal
1386
@dbus.service.signal(_interface, signature="s")
1387
def Rejected(self, reason):
1388
"D-Bus signal"
1389
pass
1390
1391
# NeedApproval - signal
1392
@dbus.service.signal(_interface, signature="tb")
1393
def NeedApproval(self, timeout, default):
1394
"D-Bus signal"
1395
return self.need_approval()
1396
1397
## Methods
1398
1399
# Approve - method
1400
@dbus.service.method(_interface, in_signature="b")
1401
def Approve(self, value):
1402
self.approve(value)
1403
1404
# CheckedOK - method
1405
@dbus.service.method(_interface)
1406
def CheckedOK(self):
1407
self.checked_ok()
1408
1409
# Enable - method
1410
@dbus.service.method(_interface)
1411
def Enable(self):
1412
"D-Bus method"
1413
self.enable()
1414
1415
# StartChecker - method
1416
@dbus.service.method(_interface)
1417
def StartChecker(self):
1418
"D-Bus method"
1419
self.start_checker()
1420
1421
# Disable - method
1422
@dbus.service.method(_interface)
1423
def Disable(self):
1424
"D-Bus method"
1425
self.disable()
1426
1427
# StopChecker - method
1428
@dbus.service.method(_interface)
1429
def StopChecker(self):
1430
self.stop_checker()
1431
1432
## Properties
1433
1434
# ApprovalPending - property
1435
@dbus_service_property(_interface, signature="b", access="read")
1436
def ApprovalPending_dbus_property(self):
1437
return dbus.Boolean(bool(self.approvals_pending))
1438
1439
# ApprovedByDefault - property
1440
@dbus_service_property(_interface, signature="b",
1441
access="readwrite")
1442
def ApprovedByDefault_dbus_property(self, value=None):
1443
if value is None: # get
1444
return dbus.Boolean(self.approved_by_default)
1445
self.approved_by_default = bool(value)
1446
1447
# ApprovalDelay - property
1448
@dbus_service_property(_interface, signature="t",
1449
access="readwrite")
1450
def ApprovalDelay_dbus_property(self, value=None):
1451
if value is None: # get
1452
return dbus.UInt64(self.approval_delay_milliseconds())
1453
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
1455
# ApprovalDuration - property
1456
@dbus_service_property(_interface, signature="t",
1457
access="readwrite")
1458
def ApprovalDuration_dbus_property(self, value=None):
1459
if value is None: # get
1460
return dbus.UInt64(timedelta_to_milliseconds(
1461
self.approval_duration))
1462
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
1464
# Name - property
1465
@dbus_service_property(_interface, signature="s", access="read")
1466
def Name_dbus_property(self):
1467
return dbus.String(self.name)
1468
1469
# Fingerprint - property
1470
@dbus_service_property(_interface, signature="s", access="read")
1471
def Fingerprint_dbus_property(self):
1472
return dbus.String(self.fingerprint)
1473
1474
# Host - property
1475
@dbus_service_property(_interface, signature="s",
1476
access="readwrite")
1477
def Host_dbus_property(self, value=None):
1478
if value is None: # get
1479
return dbus.String(self.host)
1480
self.host = unicode(value)
1481
1482
# Created - property
1483
@dbus_service_property(_interface, signature="s", access="read")
1484
def Created_dbus_property(self):
1485
return datetime_to_dbus(self.created)
1486
1487
# LastEnabled - property
1488
@dbus_service_property(_interface, signature="s", access="read")
1489
def LastEnabled_dbus_property(self):
1490
return datetime_to_dbus(self.last_enabled)
1491
1492
# Enabled - property
1493
@dbus_service_property(_interface, signature="b",
1494
access="readwrite")
1495
def Enabled_dbus_property(self, value=None):
1496
if value is None: # get
1497
return dbus.Boolean(self.enabled)
1498
if value:
1499
self.enable()
1500
else:
1501
self.disable()
1502
1503
# LastCheckedOK - property
1504
@dbus_service_property(_interface, signature="s",
1505
access="readwrite")
1506
def LastCheckedOK_dbus_property(self, value=None):
1507
if value is not None:
1508
self.checked_ok()
1509
return
1510
return datetime_to_dbus(self.last_checked_ok)
1511
1512
# LastCheckerStatus - property
1513
@dbus_service_property(_interface, signature="n",
1514
access="read")
1515
def LastCheckerStatus_dbus_property(self):
1516
return dbus.Int16(self.last_checker_status)
1517
1518
# Expires - property
1519
@dbus_service_property(_interface, signature="s", access="read")
1520
def Expires_dbus_property(self):
1521
return datetime_to_dbus(self.expires)
1522
1523
# LastApprovalRequest - property
1524
@dbus_service_property(_interface, signature="s", access="read")
1525
def LastApprovalRequest_dbus_property(self):
1526
return datetime_to_dbus(self.last_approval_request)
1527
1528
# Timeout - property
1529
@dbus_service_property(_interface, signature="t",
1530
access="readwrite")
1531
def Timeout_dbus_property(self, value=None):
1532
if value is None: # get
1533
return dbus.UInt64(self.timeout_milliseconds())
1534
old_timeout = self.timeout
1535
self.timeout = datetime.timedelta(0, 0, 0, value)
1536
# Reschedule disabling
1537
if self.enabled:
1538
now = datetime.datetime.utcnow()
1539
self.expires += self.timeout - old_timeout
1540
if self.expires <= now:
1541
# The timeout has passed
1542
self.disable()
1543
else:
1544
if (getattr(self, "disable_initiator_tag", None)
1545
is None):
1546
return
1547
gobject.source_remove(self.disable_initiator_tag)
1548
self.disable_initiator_tag = (
1549
gobject.timeout_add(
1550
timedelta_to_milliseconds(self.expires - now),
1551
self.disable))
1552
1553
# ExtendedTimeout - property
1554
@dbus_service_property(_interface, signature="t",
1555
access="readwrite")
1556
def ExtendedTimeout_dbus_property(self, value=None):
1557
if value is None: # get
1558
return dbus.UInt64(self.extended_timeout_milliseconds())
1559
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
1561
# Interval - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Interval_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.interval_milliseconds())
1567
self.interval = datetime.timedelta(0, 0, 0, value)
1568
if getattr(self, "checker_initiator_tag", None) is None:
1569
return
1570
if self.enabled:
1571
# Reschedule checker run
1572
gobject.source_remove(self.checker_initiator_tag)
1573
self.checker_initiator_tag = (gobject.timeout_add
1574
(value, self.start_checker))
1575
self.start_checker() # Start one now, too
1576
1577
# Checker - property
1578
@dbus_service_property(_interface, signature="s",
1579
access="readwrite")
1580
def Checker_dbus_property(self, value=None):
1581
if value is None: # get
1582
return dbus.String(self.checker_command)
1583
self.checker_command = unicode(value)
1584
1585
# CheckerRunning - property
1586
@dbus_service_property(_interface, signature="b",
1587
access="readwrite")
1588
def CheckerRunning_dbus_property(self, value=None):
1589
if value is None: # get
1590
return dbus.Boolean(self.checker is not None)
1591
if value:
1592
self.start_checker()
1593
else:
1594
self.stop_checker()
1595
1596
# ObjectPath - property
1597
@dbus_service_property(_interface, signature="o", access="read")
1598
def ObjectPath_dbus_property(self):
1599
return self.dbus_object_path # is already a dbus.ObjectPath
1600
1601
# Secret = property
1602
@dbus_service_property(_interface, signature="ay",
1603
access="write", byte_arrays=True)
1604
def Secret_dbus_property(self, value):
1605
self.secret = str(value)
1606
1607
del _interface
1608
1609
1610
class ProxyClient(object):
1611
def __init__(self, child_pipe, fpr, address):
1612
self._pipe = child_pipe
1613
self._pipe.send(('init', fpr, address))
1614
if not self._pipe.recv():
1615
raise KeyError()
1616
1617
def __getattribute__(self, name):
1618
if name == '_pipe':
1619
return super(ProxyClient, self).__getattribute__(name)
1620
self._pipe.send(('getattr', name))
1621
data = self._pipe.recv()
1622
if data[0] == 'data':
1623
return data[1]
1624
if data[0] == 'function':
1625
def func(*args, **kwargs):
1626
self._pipe.send(('funcall', name, args, kwargs))
1627
return self._pipe.recv()[1]
1628
return func
1629
1630
def __setattr__(self, name, value):
1631
if name == '_pipe':
1632
return super(ProxyClient, self).__setattr__(name, value)
1633
self._pipe.send(('setattr', name, value))
1634
1635
1636
class ClientHandler(socketserver.BaseRequestHandler, object):
1637
"""A class to handle client connections.
1638
1639
Instantiated once for each connection to handle it.
442
1640
Note: This will run in its own forked process."""
443
1641
444
1642
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1643
with contextlib.closing(self.server.child_pipe) as child_pipe:
1644
logger.info("TCP connection from: %s",
1645
unicode(self.client_address))
1646
logger.debug("Pipe FD: %d",
1647
self.server.child_pipe.fileno())
1648
1649
session = (gnutls.connection
1650
.ClientSession(self.request,
1651
gnutls.connection
1652
.X509Credentials()))
1653
1654
# Note: gnutls.connection.X509Credentials is really a
1655
# generic GnuTLS certificate credentials object so long as
1656
# no X.509 keys are added to it. Therefore, we can use it
1657
# here despite using OpenPGP certificates.
1658
1659
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1660
# "+AES-256-CBC", "+SHA1",
1661
# "+COMP-NULL", "+CTYPE-OPENPGP",
1662
# "+DHE-DSS"))
1663
# Use a fallback default, since this MUST be set.
1664
priority = self.server.gnutls_priority
1665
if priority is None:
1666
priority = "NORMAL"
1667
(gnutls.library.functions
1668
.gnutls_priority_set_direct(session._c_object,
1669
priority, None))
1670
1671
# Start communication using the Mandos protocol
1672
# Get protocol number
1673
line = self.request.makefile().readline()
1674
logger.debug("Protocol version: %r", line)
1675
try:
1676
if int(line.strip().split()[0]) > 1:
1677
raise RuntimeError
1678
except (ValueError, IndexError, RuntimeError) as error:
1679
logger.error("Unknown protocol version: %s", error)
1680
return
1681
1682
# Start GnuTLS connection
1683
try:
1684
session.handshake()
1685
except gnutls.errors.GNUTLSError as error:
1686
logger.warning("Handshake failed: %s", error)
1687
# Do not run session.bye() here: the session is not
1688
# established. Just abandon the request.
1689
return
1690
logger.debug("Handshake succeeded")
1691
1692
approval_required = False
1693
try:
1694
try:
1695
fpr = self.fingerprint(self.peer_certificate
1696
(session))
1697
except (TypeError,
1698
gnutls.errors.GNUTLSError) as error:
1699
logger.warning("Bad certificate: %s", error)
1700
return
1701
logger.debug("Fingerprint: %s", fpr)
1702
1703
try:
1704
client = ProxyClient(child_pipe, fpr,
1705
self.client_address)
1706
except KeyError:
1707
return
1708
1709
if client.approval_delay:
1710
delay = client.approval_delay
1711
client.approvals_pending += 1
1712
approval_required = True
1713
1714
while True:
1715
if not client.enabled:
1716
logger.info("Client %s is disabled",
1717
client.name)
1718
if self.server.use_dbus:
1719
# Emit D-Bus signal
1720
client.Rejected("Disabled")
1721
return
1722
1723
if client.approved or not client.approval_delay:
1724
#We are approved or approval is disabled
1725
break
1726
elif client.approved is None:
1727
logger.info("Client %s needs approval",
1728
client.name)
1729
if self.server.use_dbus:
1730
# Emit D-Bus signal
1731
client.NeedApproval(
1732
client.approval_delay_milliseconds(),
1733
client.approved_by_default)
1734
else:
1735
logger.warning("Client %s was not approved",
1736
client.name)
1737
if self.server.use_dbus:
1738
# Emit D-Bus signal
1739
client.Rejected("Denied")
1740
return
1741
1742
#wait until timeout or approved
1743
time = datetime.datetime.now()
1744
client.changedstate.acquire()
1745
client.changedstate.wait(
1746
float(timedelta_to_milliseconds(delay)
1747
/ 1000))
1748
client.changedstate.release()
1749
time2 = datetime.datetime.now()
1750
if (time2 - time) >= delay:
1751
if not client.approved_by_default:
1752
logger.warning("Client %s timed out while"
1753
" waiting for approval",
1754
client.name)
1755
if self.server.use_dbus:
1756
# Emit D-Bus signal
1757
client.Rejected("Approval timed out")
1758
return
1759
else:
1760
break
1761
else:
1762
delay -= time2 - time
1763
1764
sent_size = 0
1765
while sent_size < len(client.secret):
1766
try:
1767
sent = session.send(client.secret[sent_size:])
1768
except gnutls.errors.GNUTLSError as error:
1769
logger.warning("gnutls send failed",
1770
exc_info=error)
1771
return
1772
logger.debug("Sent: %d, remaining: %d",
1773
sent, len(client.secret)
1774
- (sent_size + sent))
1775
sent_size += sent
1776
1777
logger.info("Sending secret to %s", client.name)
1778
# bump the timeout using extended_timeout
1779
client.bump_timeout(client.extended_timeout)
1780
if self.server.use_dbus:
1781
# Emit D-Bus signal
1782
client.GotSecret()
1783
1784
finally:
1785
if approval_required:
1786
client.approvals_pending -= 1
1787
try:
1788
session.bye()
1789
except gnutls.errors.GNUTLSError as error:
1790
logger.warning("GnuTLS bye failed",
1791
exc_info=error)
1792
1793
@staticmethod
1794
def peer_certificate(session):
1795
"Return the peer's OpenPGP certificate as a bytestring"
1796
# If not an OpenPGP certificate...
1797
if (gnutls.library.functions
1798
.gnutls_certificate_type_get(session._c_object)
1799
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1800
# ...do the normal thing
1801
return session.peer_certificate
1802
list_size = ctypes.c_uint(1)
1803
cert_list = (gnutls.library.functions
1804
.gnutls_certificate_get_peers
1805
(session._c_object, ctypes.byref(list_size)))
1806
if not bool(cert_list) and list_size.value != 0:
1807
raise gnutls.errors.GNUTLSError("error getting peer"
1808
" certificate")
1809
if list_size.value == 0:
1810
return None
1811
cert = cert_list[0]
1812
return ctypes.string_at(cert.data, cert.size)
1813
1814
@staticmethod
1815
def fingerprint(openpgp):
1816
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1817
# New GnuTLS "datum" with the OpenPGP public key
1818
datum = (gnutls.library.types
1819
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1820
ctypes.POINTER
1821
(ctypes.c_ubyte)),
1822
ctypes.c_uint(len(openpgp))))
1823
# New empty GnuTLS certificate
1824
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1825
(gnutls.library.functions
1826
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1827
# Import the OpenPGP public key into the certificate
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1830
gnutls.library.constants
1831
.GNUTLS_OPENPGP_FMT_RAW))
1832
# Verify the self signature in the key
1833
crtverify = ctypes.c_uint()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_verify_self(crt, 0,
1836
ctypes.byref(crtverify)))
1837
if crtverify.value != 0:
1838
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1839
raise (gnutls.errors.CertificateSecurityError
1840
("Verify failed"))
1841
# New buffer for the fingerprint
1842
buf = ctypes.create_string_buffer(20)
1843
buf_len = ctypes.c_size_t()
1844
# Get the fingerprint from the certificate into the buffer
1845
(gnutls.library.functions
1846
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1847
ctypes.byref(buf_len)))
1848
# Deinit the certificate
1849
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1850
# Convert the buffer to a Python bytestring
1851
fpr = ctypes.string_at(buf, buf_len.value)
1852
# Convert the bytestring to hexadecimal notation
1853
hex_fpr = binascii.hexlify(fpr).upper()
1854
return hex_fpr
1855
1856
1857
class MultiprocessingMixIn(object):
1858
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1859
def sub_process_main(self, request, address):
1860
try:
1861
self.finish_request(request, address)
1862
except Exception:
1863
self.handle_error(request, address)
1864
self.close_request(request)
1865
1866
def process_request(self, request, address):
1867
"""Start a new process to process the request."""
1868
proc = multiprocessing.Process(target = self.sub_process_main,
1869
args = (request, address))
1870
proc.start()
1871
return proc
1872
1873
1874
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1875
""" adds a pipe to the MixIn """
1876
def process_request(self, request, client_address):
1877
"""Overrides and wraps the original process_request().
1878
1879
This function creates a new pipe in self.pipe
1880
"""
1881
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1882
1883
proc = MultiprocessingMixIn.process_request(self, request,
1884
client_address)
1885
self.child_pipe.close()
1886
self.add_pipe(parent_pipe, proc)
1887
1888
def add_pipe(self, parent_pipe, proc):
1889
"""Dummy function; override as necessary"""
1890
raise NotImplementedError
1891
1892
1893
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1894
socketserver.TCPServer, object):
1895
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1896
518
1897
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1898
enabled: Boolean; whether this server is activated yet
1899
interface: None or a network interface name (string)
1900
use_ipv6: Boolean; to use IPv6 or not
522
1901
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1902
def __init__(self, server_address, RequestHandlerClass,
1903
interface=None, use_ipv6=True, socketfd=None):
1904
"""If socketfd is set, use that file descriptor instead of
1905
creating a new one with socket.socket().
1906
"""
1907
self.interface = interface
1908
if use_ipv6:
1909
self.address_family = socket.AF_INET6
1910
if socketfd is not None:
1911
# Save the file descriptor
1912
self.socketfd = socketfd
1913
# Save the original socket.socket() function
1914
self.socket_socket = socket.socket
1915
# To implement --socket, we monkey patch socket.socket.
1916
#
1917
# (When socketserver.TCPServer is a new-style class, we
1918
# could make self.socket into a property instead of monkey
1919
# patching socket.socket.)
1920
#
1921
# Create a one-time-only replacement for socket.socket()
1922
@functools.wraps(socket.socket)
1923
def socket_wrapper(*args, **kwargs):
1924
# Restore original function so subsequent calls are
1925
# not affected.
1926
socket.socket = self.socket_socket
1927
del self.socket_socket
1928
# This time only, return a new socket object from the
1929
# saved file descriptor.
1930
return socket.fromfd(self.socketfd, *args, **kwargs)
1931
# Replace socket.socket() function with wrapper
1932
socket.socket = socket_wrapper
1933
# The socketserver.TCPServer.__init__ will call
1934
# socket.socket(), which might be our replacement,
1935
# socket_wrapper(), if socketfd was set.
1936
socketserver.TCPServer.__init__(self, server_address,
1937
RequestHandlerClass)
1938
533
1939
def server_bind(self):
534
1940
"""This overrides the normal server_bind() function
535
1941
to bind to an interface if one was specified, and also NOT to
536
1942
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1943
if self.interface is not None:
1944
if SO_BINDTODEVICE is None:
1945
logger.error("SO_BINDTODEVICE does not exist;"
1946
" cannot bind to interface %s",
1947
self.interface)
1948
else:
1949
try:
1950
self.socket.setsockopt(socket.SOL_SOCKET,
1951
SO_BINDTODEVICE,
1952
str(self.interface + '\0'))
1953
except socket.error as error:
1954
if error.errno == errno.EPERM:
1955
logger.error("No permission to bind to"
1956
" interface %s", self.interface)
1957
elif error.errno == errno.ENOPROTOOPT:
1958
logger.error("SO_BINDTODEVICE not available;"
1959
" cannot bind to interface %s",
1960
self.interface)
1961
elif error.errno == errno.ENODEV:
1962
logger.error("Interface %s does not exist,"
1963
" cannot bind", self.interface)
1964
else:
1965
raise
551
1966
# Only bind(2) the socket if we really need to.
552
1967
if self.server_address[0] or self.server_address[1]:
553
1968
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1969
if self.address_family == socket.AF_INET6:
1970
any_address = "::" # in6addr_any
1971
else:
1972
any_address = socket.INADDR_ANY
1973
self.server_address = (any_address,
556
1974
self.server_address[1])
557
1975
elif not self.server_address[1]:
558
1976
self.server_address = (self.server_address[0],
559
1977
0)
560
# if self.settings["interface"]:
1978
# if self.interface:
561
1979
# self.server_address = (self.server_address[0],
562
1980
# 0, # port
563
1981
# 0, # flowinfo
564
1982
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1983
# (self.interface))
1984
return socketserver.TCPServer.server_bind(self)
1985
1986
1987
class MandosServer(IPv6_TCPServer):
1988
"""Mandos server.
1989
1990
Attributes:
1991
clients: set of Client objects
1992
gnutls_priority GnuTLS priority string
1993
use_dbus: Boolean; to emit D-Bus signals or not
1994
1995
Assumes a gobject.MainLoop event loop.
1996
"""
1997
def __init__(self, server_address, RequestHandlerClass,
1998
interface=None, use_ipv6=True, clients=None,
1999
gnutls_priority=None, use_dbus=True, socketfd=None):
2000
self.enabled = False
2001
self.clients = clients
2002
if self.clients is None:
2003
self.clients = {}
2004
self.use_dbus = use_dbus
2005
self.gnutls_priority = gnutls_priority
2006
IPv6_TCPServer.__init__(self, server_address,
2007
RequestHandlerClass,
2008
interface = interface,
2009
use_ipv6 = use_ipv6,
2010
socketfd = socketfd)
568
2011
def server_activate(self):
569
2012
if self.enabled:
570
return super(type(self), self).server_activate()
2013
return socketserver.TCPServer.server_activate(self)
2014
571
2015
def enable(self):
572
2016
self.enabled = True
2017
2018
def add_pipe(self, parent_pipe, proc):
2019
# Call "handle_ipc" for both data and EOF events
2020
gobject.io_add_watch(parent_pipe.fileno(),
2021
gobject.IO_IN | gobject.IO_HUP,
2022
functools.partial(self.handle_ipc,
2023
parent_pipe =
2024
parent_pipe,
2025
proc = proc))
2026
2027
def handle_ipc(self, source, condition, parent_pipe=None,
2028
proc = None, client_object=None):
2029
# error, or the other end of multiprocessing.Pipe has closed
2030
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2031
# Wait for other process to exit
2032
proc.join()
2033
return False
2034
2035
# Read a request from the child
2036
request = parent_pipe.recv()
2037
command = request[0]
2038
2039
if command == 'init':
2040
fpr = request[1]
2041
address = request[2]
2042
2043
for c in self.clients.itervalues():
2044
if c.fingerprint == fpr:
2045
client = c
2046
break
2047
else:
2048
logger.info("Client not found for fingerprint: %s, ad"
2049
"dress: %s", fpr, address)
2050
if self.use_dbus:
2051
# Emit D-Bus signal
2052
mandos_dbus_service.ClientNotFound(fpr,
2053
address[0])
2054
parent_pipe.send(False)
2055
return False
2056
2057
gobject.io_add_watch(parent_pipe.fileno(),
2058
gobject.IO_IN | gobject.IO_HUP,
2059
functools.partial(self.handle_ipc,
2060
parent_pipe =
2061
parent_pipe,
2062
proc = proc,
2063
client_object =
2064
client))
2065
parent_pipe.send(True)
2066
# remove the old hook in favor of the new above hook on
2067
# same fileno
2068
return False
2069
if command == 'funcall':
2070
funcname = request[1]
2071
args = request[2]
2072
kwargs = request[3]
2073
2074
parent_pipe.send(('data', getattr(client_object,
2075
funcname)(*args,
2076
**kwargs)))
2077
2078
if command == 'getattr':
2079
attrname = request[1]
2080
if callable(client_object.__getattribute__(attrname)):
2081
parent_pipe.send(('function',))
2082
else:
2083
parent_pipe.send(('data', client_object
2084
.__getattribute__(attrname)))
2085
2086
if command == 'setattr':
2087
attrname = request[1]
2088
value = request[2]
2089
setattr(client_object, attrname, value)
2090
2091
return True
2092
2093
2094
def rfc3339_duration_to_delta(duration):
2095
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2096
2097
>>> rfc3339_duration_to_delta("P7D")
2098
datetime.timedelta(7)
2099
>>> rfc3339_duration_to_delta("PT60S")
2100
datetime.timedelta(0, 60)
2101
>>> rfc3339_duration_to_delta("PT60M")
2102
datetime.timedelta(0, 3600)
2103
>>> rfc3339_duration_to_delta("PT24H")
2104
datetime.timedelta(1)
2105
>>> rfc3339_duration_to_delta("P1W")
2106
datetime.timedelta(7)
2107
>>> rfc3339_duration_to_delta("PT5M30S")
2108
datetime.timedelta(0, 330)
2109
>>> rfc3339_duration_to_delta("P1DT3M20S")
2110
datetime.timedelta(1, 200)
2111
"""
2112
2113
# Parsing an RFC 3339 duration with regular expressions is not
2114
# possible - there would have to be multiple places for the same
2115
# values, like seconds. The current code, while more esoteric, is
2116
# cleaner without depending on a parsing library. If Python had a
2117
# built-in library for parsing we would use it, but we'd like to
2118
# avoid excessive use of external libraries.
2119
2120
# New type for defining tokens, syntax, and semantics all-in-one
2121
Token = collections.namedtuple("Token",
2122
("regexp", # To match token; if
2123
# "value" is not None,
2124
# must have a "group"
2125
# containing digits
2126
"value", # datetime.timedelta or
2127
# None
2128
"followers")) # Tokens valid after
2129
# this token
2130
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2131
# the "duration" ABNF definition in RFC 3339, Appendix A.
2132
token_end = Token(re.compile(r"$"), None, frozenset())
2133
token_second = Token(re.compile(r"(\d+)S"),
2134
datetime.timedelta(seconds=1),
2135
frozenset((token_end,)))
2136
token_minute = Token(re.compile(r"(\d+)M"),
2137
datetime.timedelta(minutes=1),
2138
frozenset((token_second, token_end)))
2139
token_hour = Token(re.compile(r"(\d+)H"),
2140
datetime.timedelta(hours=1),
2141
frozenset((token_minute, token_end)))
2142
token_time = Token(re.compile(r"T"),
2143
None,
2144
frozenset((token_hour, token_minute,
2145
token_second)))
2146
token_day = Token(re.compile(r"(\d+)D"),
2147
datetime.timedelta(days=1),
2148
frozenset((token_time, token_end)))
2149
token_month = Token(re.compile(r"(\d+)M"),
2150
datetime.timedelta(weeks=4),
2151
frozenset((token_day, token_end)))
2152
token_year = Token(re.compile(r"(\d+)Y"),
2153
datetime.timedelta(weeks=52),
2154
frozenset((token_month, token_end)))
2155
token_week = Token(re.compile(r"(\d+)W"),
2156
datetime.timedelta(weeks=1),
2157
frozenset((token_end,)))
2158
token_duration = Token(re.compile(r"P"), None,
2159
frozenset((token_year, token_month,
2160
token_day, token_time,
2161
token_week))),
2162
# Define starting values
2163
value = datetime.timedelta() # Value so far
2164
found_token = None
2165
followers = frozenset(token_duration,) # Following valid tokens
2166
s = duration # String left to parse
2167
# Loop until end token is found
2168
while found_token is not token_end:
2169
# Search for any currently valid tokens
2170
for token in followers:
2171
match = token.regexp.match(s)
2172
if match is not None:
2173
# Token found
2174
if token.value is not None:
2175
# Value found, parse digits
2176
factor = int(match.group(1), 10)
2177
# Add to value so far
2178
value += factor * token.value
2179
# Strip token from string
2180
s = token.regexp.sub("", s, 1)
2181
# Go to found token
2182
found_token = token
2183
# Set valid next tokens
2184
followers = found_token.followers
2185
break
2186
else:
2187
# No currently valid tokens were found
2188
raise ValueError("Invalid RFC 3339 duration")
2189
# End token found
2190
return value
573
2191
574
2192
575
2193
def string_to_delta(interval):
576
2194
"""Parse a string and return a datetime.timedelta
577
2195
578
2196
>>> string_to_delta('7d')
579
2197
datetime.timedelta(7)
580
2198
>>> string_to_delta('60s')
583
2201
datetime.timedelta(0, 3600)
584
2202
>>> string_to_delta('24h')
585
2203
datetime.timedelta(1)
586
>>> string_to_delta(u'1w')
2204
>>> string_to_delta('1w')
587
2205
datetime.timedelta(7)
588
2206
>>> string_to_delta('5m 30s')
589
2207
datetime.timedelta(0, 330)
590
2208
"""
2209
2210
try:
2211
return rfc3339_duration_to_delta(interval)
2212
except ValueError:
2213
pass
2214
591
2215
timevalue = datetime.timedelta(0)
592
2216
for s in interval.split():
593
2217
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
2218
suffix = unicode(s[-1])
2219
value = int(s[:-1])
2220
if suffix == "d":
597
2221
delta = datetime.timedelta(value)
598
elif suffix == u"s":
2222
elif suffix == "s":
599
2223
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
2224
elif suffix == "m":
601
2225
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
2226
elif suffix == "h":
603
2227
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
2228
elif suffix == "w":
605
2229
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
2230
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
2231
raise ValueError("Unknown suffix {0!r}"
2232
.format(suffix))
2233
except (ValueError, IndexError) as e:
2234
raise ValueError(*(e.args))
610
2235
timevalue += delta
611
2236
return timevalue
612
2237
613
2238
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
640
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
645
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
2239
def daemon(nochdir = False, noclose = False):
663
2240
"""See daemon(3). Standard BSD Unix function.
2241
664
2242
This should really exist as os.daemon, but it doesn't (yet)."""
665
2243
if os.fork():
666
2244
sys.exit()
671
2249
sys.exit()
672
2250
if not noclose:
673
2251
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2252
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
675
2253
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
2254
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
2255
"{0} not a character device"
2256
.format(os.devnull))
678
2257
os.dup2(null, sys.stdin.fileno())
679
2258
os.dup2(null, sys.stdout.fileno())
680
2259
os.dup2(null, sys.stderr.fileno())
683
2262
684
2263
685
2264
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
2265
2266
##################################################################
2267
# Parsing of options, both command line and config file
2268
2269
parser = argparse.ArgumentParser()
2270
parser.add_argument("-v", "--version", action="version",
2271
version = "%(prog)s {0}".format(version),
2272
help="show version number and exit")
2273
parser.add_argument("-i", "--interface", metavar="IF",
2274
help="Bind to interface IF")
2275
parser.add_argument("-a", "--address",
2276
help="Address to listen for requests on")
2277
parser.add_argument("-p", "--port", type=int,
2278
help="Port number to receive requests on")
2279
parser.add_argument("--check", action="store_true",
2280
help="Run self-test")
2281
parser.add_argument("--debug", action="store_true",
2282
help="Debug mode; run in foreground and log"
2283
" to terminal")
2284
parser.add_argument("--debuglevel", metavar="LEVEL",
2285
help="Debug level for stdout output")
2286
parser.add_argument("--priority", help="GnuTLS"
2287
" priority string (see GnuTLS documentation)")
2288
parser.add_argument("--servicename",
2289
metavar="NAME", help="Zeroconf service name")
2290
parser.add_argument("--configdir",
2291
default="/etc/mandos", metavar="DIR",
2292
help="Directory to search for configuration"
2293
" files")
2294
parser.add_argument("--no-dbus", action="store_false",
2295
dest="use_dbus", help="Do not provide D-Bus"
2296
" system bus interface")
2297
parser.add_argument("--no-ipv6", action="store_false",
2298
dest="use_ipv6", help="Do not use IPv6")
2299
parser.add_argument("--no-restore", action="store_false",
2300
dest="restore", help="Do not restore stored"
2301
" state")
2302
parser.add_argument("--socket", type=int,
2303
help="Specify a file descriptor to a network"
2304
" socket to use instead of creating one")
2305
parser.add_argument("--statedir", metavar="DIR",
2306
help="Directory to save/restore state in")
2307
parser.add_argument("--foreground", action="store_true",
2308
help="Run in foreground")
2309
2310
options = parser.parse_args()
710
2311
711
2312
if options.check:
712
2313
import doctest
721
2322
"priority":
722
2323
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
2324
"servicename": "Mandos",
2325
"use_dbus": "True",
2326
"use_ipv6": "True",
2327
"debuglevel": "",
2328
"restore": "True",
2329
"socket": "",
2330
"statedir": "/var/lib/mandos",
2331
"foreground": "False",
724
2332
}
725
2333
726
2334
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
2335
server_config = configparser.SafeConfigParser(server_defaults)
728
2336
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2337
server_config.read(os.path.join(options.configdir,
2338
"mandos.conf"))
730
2339
# Convert the SafeConfigParser object to a dict
731
2340
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
2341
# Use the appropriate methods on the non-string config options
2342
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2343
server_settings[option] = server_config.getboolean("DEFAULT",
2344
option)
2345
if server_settings["port"]:
2346
server_settings["port"] = server_config.getint("DEFAULT",
2347
"port")
2348
if server_settings["socket"]:
2349
server_settings["socket"] = server_config.getint("DEFAULT",
2350
"socket")
2351
# Later, stdin will, and stdout and stderr might, be dup'ed
2352
# over with an opened os.devnull. But we don't want this to
2353
# happen with a supplied network socket.
2354
if 0 <= server_settings["socket"] <= 2:
2355
server_settings["socket"] = os.dup(server_settings
2356
["socket"])
735
2357
del server_config
736
2358
737
2359
# Override the settings from the config file with command line
738
2360
# options, if set.
739
2361
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
2362
"priority", "servicename", "configdir",
2363
"use_dbus", "use_ipv6", "debuglevel", "restore",
2364
"statedir", "socket", "foreground"):
741
2365
value = getattr(options, option)
742
2366
if value is not None:
743
2367
server_settings[option] = value
744
2368
del options
2369
# Force all strings to be unicode
2370
for option in server_settings.keys():
2371
if type(server_settings[option]) is str:
2372
server_settings[option] = unicode(server_settings[option])
2373
# Debug implies foreground
2374
if server_settings["debug"]:
2375
server_settings["foreground"] = True
745
2376
# Now we have our good server settings in "server_settings"
746
2377
2378
##################################################################
2379
2380
# For convenience
747
2381
debug = server_settings["debug"]
2382
debuglevel = server_settings["debuglevel"]
2383
use_dbus = server_settings["use_dbus"]
2384
use_ipv6 = server_settings["use_ipv6"]
2385
stored_state_path = os.path.join(server_settings["statedir"],
2386
stored_state_file)
2387
foreground = server_settings["foreground"]
748
2388
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
2389
if debug:
2390
initlogger(debug, logging.DEBUG)
2391
else:
2392
if not debuglevel:
2393
initlogger(debug)
2394
else:
2395
level = getattr(logging, debuglevel.upper())
2396
initlogger(debug, level)
752
2397
753
2398
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
2399
syslogger.setFormatter(logging.Formatter
2400
('Mandos ({0}) [%(process)d]:'
2401
' %(levelname)s: %(message)s'
2402
.format(server_settings
2403
["servicename"])))
758
2404
759
2405
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
2406
client_config = configparser.SafeConfigParser(Client
2407
.client_defaults)
766
2408
client_config.read(os.path.join(server_settings["configdir"],
767
2409
"clients.conf"))
768
2410
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
2411
global mandos_dbus_service
2412
mandos_dbus_service = None
2413
2414
tcp_server = MandosServer((server_settings["address"],
2415
server_settings["port"]),
2416
ClientHandler,
2417
interface=(server_settings["interface"]
2418
or None),
2419
use_ipv6=use_ipv6,
2420
gnutls_priority=
2421
server_settings["priority"],
2422
use_dbus=use_dbus,
2423
socketfd=(server_settings["socket"]
2424
or None))
2425
if not foreground:
2426
pidfilename = "/var/run/mandos.pid"
2427
pidfile = None
2428
try:
2429
pidfile = open(pidfilename, "w")
2430
except IOError as e:
2431
logger.error("Could not open file %r", pidfilename,
2432
exc_info=e)
2433
2434
for name in ("_mandos", "mandos", "nobody"):
2435
try:
2436
uid = pwd.getpwnam(name).pw_uid
2437
gid = pwd.getpwnam(name).pw_gid
2438
break
2439
except KeyError:
2440
continue
2441
else:
2442
uid = 65534
2443
gid = 65534
2444
try:
2445
os.setgid(gid)
798
2446
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
801
if error[0] != errno.EPERM:
2447
except OSError as error:
2448
if error.errno != errno.EPERM:
802
2449
raise error
803
2450
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
2451
if debug:
2452
# Enable all possible GnuTLS debugging
2453
2454
# "Use a log level over 10 to enable all debugging options."
2455
# - GnuTLS manual
2456
gnutls.library.functions.gnutls_global_set_log_level(11)
2457
2458
@gnutls.library.types.gnutls_log_func
2459
def debug_gnutls(level, string):
2460
logger.debug("GnuTLS: %s", string[:-1])
2461
2462
(gnutls.library.functions
2463
.gnutls_global_set_log_function(debug_gnutls))
2464
2465
# Redirect stdin so all checkers get /dev/null
2466
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2467
os.dup2(null, sys.stdin.fileno())
2468
if null > 2:
2469
os.close(null)
2470
2471
# Need to fork before connecting to D-Bus
2472
if not foreground:
2473
# Close all input and output, do double fork, etc.
2474
daemon()
2475
2476
# multiprocessing will use threads, so before we use gobject we
2477
# need to inform gobject that threads will be used.
2478
gobject.threads_init()
810
2479
811
2480
global main_loop
812
global bus
813
global server
814
2481
# From the Avahi example code
815
DBusGMainLoop(set_as_default=True )
2482
DBusGMainLoop(set_as_default=True)
816
2483
main_loop = gobject.MainLoop()
817
2484
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
2485
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
2486
if use_dbus:
2487
try:
2488
bus_name = dbus.service.BusName("se.recompile.Mandos",
2489
bus, do_not_queue=True)
2490
old_bus_name = (dbus.service.BusName
2491
("se.bsnet.fukt.Mandos", bus,
2492
do_not_queue=True))
2493
except dbus.exceptions.NameExistsException as e:
2494
logger.error("Disabling D-Bus:", exc_info=e)
2495
use_dbus = False
2496
server_settings["use_dbus"] = False
2497
tcp_server.use_dbus = False
2498
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2499
service = AvahiServiceToSyslog(name =
2500
server_settings["servicename"],
2501
servicetype = "_mandos._tcp",
2502
protocol = protocol, bus = bus)
2503
if server_settings["interface"]:
2504
service.interface = (if_nametoindex
2505
(str(server_settings["interface"])))
2506
2507
global multiprocessing_manager
2508
multiprocessing_manager = multiprocessing.Manager()
2509
2510
client_class = Client
2511
if use_dbus:
2512
client_class = functools.partial(ClientDBus, bus = bus)
2513
2514
client_settings = Client.config_parser(client_config)
2515
old_client_settings = {}
2516
clients_data = {}
2517
2518
# Get client data and settings from last running state.
2519
if server_settings["restore"]:
2520
try:
2521
with open(stored_state_path, "rb") as stored_state:
2522
clients_data, old_client_settings = (pickle.load
2523
(stored_state))
2524
os.remove(stored_state_path)
2525
except IOError as e:
2526
if e.errno == errno.ENOENT:
2527
logger.warning("Could not load persistent state: {0}"
2528
.format(os.strerror(e.errno)))
2529
else:
2530
logger.critical("Could not load persistent state:",
2531
exc_info=e)
2532
raise
2533
except EOFError as e:
2534
logger.warning("Could not load persistent state: "
2535
"EOFError:", exc_info=e)
2536
2537
with PGPEngine() as pgp:
2538
for client_name, client in clients_data.iteritems():
2539
# Decide which value to use after restoring saved state.
2540
# We have three different values: Old config file,
2541
# new config file, and saved state.
2542
# New config value takes precedence if it differs from old
2543
# config value, otherwise use saved state.
2544
for name, value in client_settings[client_name].items():
2545
try:
2546
# For each value in new config, check if it
2547
# differs from the old config value (Except for
2548
# the "secret" attribute)
2549
if (name != "secret" and
2550
value != old_client_settings[client_name]
2551
[name]):
2552
client[name] = value
2553
except KeyError:
2554
pass
2555
2556
# Clients who has passed its expire date can still be
2557
# enabled if its last checker was successful. Clients
2558
# whose checker succeeded before we stored its state is
2559
# assumed to have successfully run all checkers during
2560
# downtime.
2561
if client["enabled"]:
2562
if datetime.datetime.utcnow() >= client["expires"]:
2563
if not client["last_checked_ok"]:
2564
logger.warning(
2565
"disabling client {0} - Client never "
2566
"performed a successful checker"
2567
.format(client_name))
2568
client["enabled"] = False
2569
elif client["last_checker_status"] != 0:
2570
logger.warning(
2571
"disabling client {0} - Client "
2572
"last checker failed with error code {1}"
2573
.format(client_name,
2574
client["last_checker_status"]))
2575
client["enabled"] = False
2576
else:
2577
client["expires"] = (datetime.datetime
2578
.utcnow()
2579
+ client["timeout"])
2580
logger.debug("Last checker succeeded,"
2581
" keeping {0} enabled"
2582
.format(client_name))
2583
try:
2584
client["secret"] = (
2585
pgp.decrypt(client["encrypted_secret"],
2586
client_settings[client_name]
2587
["secret"]))
2588
except PGPError:
2589
# If decryption fails, we use secret from new settings
2590
logger.debug("Failed to decrypt {0} old secret"
2591
.format(client_name))
2592
client["secret"] = (
2593
client_settings[client_name]["secret"])
2594
2595
# Add/remove clients based on new changes made to config
2596
for client_name in (set(old_client_settings)
2597
- set(client_settings)):
2598
del clients_data[client_name]
2599
for client_name in (set(client_settings)
2600
- set(old_client_settings)):
2601
clients_data[client_name] = client_settings[client_name]
2602
2603
# Create all client objects
2604
for client_name, client in clients_data.iteritems():
2605
tcp_server.clients[client_name] = client_class(
2606
name = client_name, settings = client)
2607
2608
if not tcp_server.clients:
2609
logger.warning("No clients defined")
2610
2611
if not foreground:
2612
if pidfile is not None:
2613
try:
2614
with pidfile:
2615
pid = os.getpid()
2616
pidfile.write(str(pid) + "\n".encode("utf-8"))
2617
except IOError:
2618
logger.error("Could not write to file %r with PID %d",
2619
pidfilename, pid)
854
2620
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
2621
del pidfilename
2622
2623
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2624
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2625
2626
if use_dbus:
2627
@alternate_dbus_interfaces({"se.recompile.Mandos":
2628
"se.bsnet.fukt.Mandos"})
2629
class MandosDBusService(DBusObjectWithProperties):
2630
"""A D-Bus proxy object"""
2631
def __init__(self):
2632
dbus.service.Object.__init__(self, bus, "/")
2633
_interface = "se.recompile.Mandos"
2634
2635
@dbus_interface_annotations(_interface)
2636
def _foo(self):
2637
return { "org.freedesktop.DBus.Property"
2638
".EmitsChangedSignal":
2639
"false"}
2640
2641
@dbus.service.signal(_interface, signature="o")
2642
def ClientAdded(self, objpath):
2643
"D-Bus signal"
2644
pass
2645
2646
@dbus.service.signal(_interface, signature="ss")
2647
def ClientNotFound(self, fingerprint, address):
2648
"D-Bus signal"
2649
pass
2650
2651
@dbus.service.signal(_interface, signature="os")
2652
def ClientRemoved(self, objpath, name):
2653
"D-Bus signal"
2654
pass
2655
2656
@dbus.service.method(_interface, out_signature="ao")
2657
def GetAllClients(self):
2658
"D-Bus method"
2659
return dbus.Array(c.dbus_object_path
2660
for c in
2661
tcp_server.clients.itervalues())
2662
2663
@dbus.service.method(_interface,
2664
out_signature="a{oa{sv}}")
2665
def GetAllClientsWithProperties(self):
2666
"D-Bus method"
2667
return dbus.Dictionary(
2668
((c.dbus_object_path, c.GetAll(""))
2669
for c in tcp_server.clients.itervalues()),
2670
signature="oa{sv}")
2671
2672
@dbus.service.method(_interface, in_signature="o")
2673
def RemoveClient(self, object_path):
2674
"D-Bus method"
2675
for c in tcp_server.clients.itervalues():
2676
if c.dbus_object_path == object_path:
2677
del tcp_server.clients[c.name]
2678
c.remove_from_connection()
2679
# Don't signal anything except ClientRemoved
2680
c.disable(quiet=True)
2681
# Emit D-Bus signal
2682
self.ClientRemoved(object_path, c.name)
2683
return
2684
raise KeyError(object_path)
2685
2686
del _interface
2687
2688
mandos_dbus_service = MandosDBusService()
862
2689
863
2690
def cleanup():
864
2691
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
2692
service.cleanup()
2693
2694
multiprocessing.active_children()
2695
if not (tcp_server.clients or client_settings):
2696
return
2697
2698
# Store client before exiting. Secrets are encrypted with key
2699
# based on what config file has. If config file is
2700
# removed/edited, old secret will thus be unrecovable.
2701
clients = {}
2702
with PGPEngine() as pgp:
2703
for client in tcp_server.clients.itervalues():
2704
key = client_settings[client.name]["secret"]
2705
client.encrypted_secret = pgp.encrypt(client.secret,
2706
key)
2707
client_dict = {}
2708
2709
# A list of attributes that can not be pickled
2710
# + secret.
2711
exclude = set(("bus", "changedstate", "secret",
2712
"checker"))
2713
for name, typ in (inspect.getmembers
2714
(dbus.service.Object)):
2715
exclude.add(name)
2716
2717
client_dict["encrypted_secret"] = (client
2718
.encrypted_secret)
2719
for attr in client.client_structure:
2720
if attr not in exclude:
2721
client_dict[attr] = getattr(client, attr)
2722
2723
clients[client.name] = client_dict
2724
del client_settings[client.name]["secret"]
2725
2726
try:
2727
with (tempfile.NamedTemporaryFile
2728
(mode='wb', suffix=".pickle", prefix='clients-',
2729
dir=os.path.dirname(stored_state_path),
2730
delete=False)) as stored_state:
2731
pickle.dump((clients, client_settings), stored_state)
2732
tempname=stored_state.name
2733
os.rename(tempname, stored_state_path)
2734
except (IOError, OSError) as e:
2735
if not debug:
2736
try:
2737
os.remove(tempname)
2738
except NameError:
2739
pass
2740
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2741
logger.warning("Could not save persistent state: {0}"
2742
.format(os.strerror(e.errno)))
2743
else:
2744
logger.warning("Could not save persistent state:",
2745
exc_info=e)
2746
raise e
2747
2748
# Delete all clients, and settings from config
2749
while tcp_server.clients:
2750
name, client = tcp_server.clients.popitem()
2751
if use_dbus:
2752
client.remove_from_connection()
2753
# Don't signal anything except ClientRemoved
2754
client.disable(quiet=True)
2755
if use_dbus:
2756
# Emit D-Bus signal
2757
mandos_dbus_service.ClientRemoved(client
2758
.dbus_object_path,
2759
client.name)
2760
client_settings.clear()
876
2761
877
2762
atexit.register(cleanup)
878
2763
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
2764
for client in tcp_server.clients.itervalues():
2765
if use_dbus:
2766
# Emit D-Bus signal
2767
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2768
# Need to initiate checking of clients
2769
if client.enabled:
2770
client.init_checker()
886
2771
887
2772
tcp_server.enable()
888
2773
tcp_server.server_activate()
889
2774
890
2775
# Find out what port we got
891
2776
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
2777
if use_ipv6:
2778
logger.info("Now listening on address %r, port %d,"
2779
" flowinfo %d, scope_id %d",
2780
*tcp_server.socket.getsockname())
2781
else: # IPv4
2782
logger.info("Now listening on address %r, port %d",
2783
*tcp_server.socket.getsockname())
894
2784
895
2785
#service.interface = tcp_server.socket.getsockname()[3]
896
2786
897
2787
try:
898
2788
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
2789
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
2790
service.activate()
2791
except dbus.exceptions.DBusException as error:
2792
logger.critical("D-Bus Exception", exc_info=error)
2793
cleanup()
904
2794
sys.exit(1)
905
2795
# End of Avahi example code
906
2796
907
2797
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2798
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
2799
(tcp_server.handle_request
2800
(*args[2:], **kwargs) or True))
911
2801
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
2802
logger.debug("Starting main loop")
914
2803
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
2804
except AvahiError as error:
2805
logger.critical("Avahi Error", exc_info=error)
2806
cleanup()
917
2807
sys.exit(1)
918
2808
except KeyboardInterrupt:
919
2809
if debug:
920
print
2810
print("", file=sys.stderr)
2811
logger.debug("Server received KeyboardInterrupt")
2812
logger.debug("Server exiting")
2813
# Must run before the D-Bus bus name gets deregistered
2814
cleanup()
921
2815
922
2816
if __name__ == '__main__':
923
2817
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0