To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to server.py
- browse files at revision 46
- compare with another revision
- download diff
- download tarball
- view history from revision 46
- Committer: Teddy Hogeborn
- Date: 2008-08-04 23:38:26 UTC
- mfrom: (24.1.20 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080804233826-idy7v8x36llseue0
* network-protocol.txt: New.
* server.py (daemon): Do the double fork thing.
* server.py (daemon): Do the double fork thing.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
40
35
import socket
41
import argparse
36
import select
37
from optparse import OptionParser
42
38
import datetime
43
39
import errno
44
40
import gnutls.crypto
47
43
import gnutls.library.functions
48
44
import gnutls.library.constants
49
45
import gnutls.library.types
50
import ConfigParser as configparser
46
import ConfigParser
51
47
import sys
52
48
import re
53
49
import os
54
50
import signal
51
from sets import Set
55
52
import subprocess
56
53
import atexit
57
54
import stat
58
55
import logging
59
56
import logging.handlers
60
import pwd
61
import contextlib
62
import struct
63
import fcntl
64
import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
70
import itertools
71
import collections
72
57
73
58
import dbus
74
import dbus.service
75
59
import gobject
76
60
import avahi
77
61
from dbus.mainloop.glib import DBusGMainLoop
78
62
import ctypes
79
import ctypes.util
80
import xml.dom.minidom
81
import inspect
82
83
try:
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
except AttributeError:
86
try:
87
from IN import SO_BINDTODEVICE
88
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.6.4"
92
stored_state_file = "clients.pickle"
93
94
logger = logging.getLogger()
95
syslogger = None
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
110
ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
116
117
syslogger = (logging.handlers.SysLogHandler
118
(facility =
119
logging.handlers.SysLogHandler.LOG_DAEMON,
120
address = str("/dev/log")))
121
syslogger.setFormatter(logging.Formatter
122
('Mandos [%(process)d]: %(levelname)s:'
123
' %(message)s'))
124
logger.addHandler(syslogger)
125
126
if debug:
127
console = logging.StreamHandler()
128
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
' [%(process)d]:'
130
' %(levelname)s:'
131
' %(message)s'))
132
logger.addHandler(console)
133
logger.setLevel(level)
134
135
136
class PGPError(Exception):
137
"""Exception if encryption/decryption fails"""
138
pass
139
140
141
class PGPEngine(object):
142
"""A simple class for OpenPGP symmetric encryption & decryption"""
143
def __init__(self):
144
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
self.gnupgargs = ['--batch',
146
'--home', self.tempdir,
147
'--force-mdc',
148
'--quiet',
149
'--no-use-agent']
150
151
def __enter__(self):
152
return self
153
154
def __exit__(self, exc_type, exc_value, traceback):
155
self._cleanup()
156
return False
157
158
def __del__(self):
159
self._cleanup()
160
161
def _cleanup(self):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
166
for filename in files:
167
os.remove(os.path.join(root, filename))
168
for dirname in dirs:
169
os.rmdir(os.path.join(root, dirname))
170
# Remove tempdir
171
os.rmdir(self.tempdir)
172
self.tempdir = None
173
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
184
185
def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
193
passfile.name]
194
+ self.gnupgargs,
195
stdin = subprocess.PIPE,
196
stdout = subprocess.PIPE,
197
stderr = subprocess.PIPE)
198
ciphertext, err = proc.communicate(input = data)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
202
203
def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
211
passfile.name]
212
+ self.gnupgargs,
213
stdin = subprocess.PIPE,
214
stdout = subprocess.PIPE,
215
stderr = subprocess.PIPE)
216
decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
63
64
65
logger = logging.Logger('mandos')
66
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
syslogger.setFormatter(logging.Formatter\
69
('%(levelname)s: %(message)s'))
70
logger.addHandler(syslogger)
71
del syslogger
221
72
222
73
223
74
class AvahiError(Exception):
224
def __init__(self, value, *args, **kwargs):
75
def __init__(self, value):
225
76
self.value = value
226
super(AvahiError, self).__init__(value, *args, **kwargs)
227
def __unicode__(self):
228
return unicode(repr(self.value))
77
def __str__(self):
78
return repr(self.value)
229
79
230
80
class AvahiServiceError(AvahiError):
231
81
pass
236
86
237
87
class AvahiService(object):
238
88
"""An Avahi (Zeroconf) service.
239
240
89
Attributes:
241
90
interface: integer; avahi.IF_UNSPEC or an interface index.
242
91
Used to optionally bind to the specified interface.
243
92
name: string; Example: 'Mandos'
244
93
type: string; Example: '_mandos._tcp'.
245
See <https://www.iana.org/assignments/service-names-port-numbers>
94
See <http://www.dns-sd.org/ServiceTypes.html>
246
95
port: integer; what port to announce
247
96
TXT: list of strings; TXT record for the service
248
97
domain: string; Domain to publish on, default to .local if empty.
250
99
max_renames: integer; maximum number of renames
251
100
rename_count: integer; counter so we only rename after collisions
252
101
a sensible number of times
253
group: D-Bus Entry Group
254
server: D-Bus Server
255
bus: dbus.SystemBus()
256
102
"""
257
258
103
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
259
servicetype = None, port = None, TXT = None,
260
domain = "", host = "", max_renames = 32768,
261
protocol = avahi.PROTO_UNSPEC, bus = None):
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
262
106
self.interface = interface
263
107
self.name = name
264
self.type = servicetype
108
self.type = type
265
109
self.port = port
266
self.TXT = TXT if TXT is not None else []
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
267
114
self.domain = domain
268
115
self.host = host
269
116
self.rename_count = 0
270
self.max_renames = max_renames
271
self.protocol = protocol
272
self.group = None # our entry group
273
self.server = None
274
self.bus = bus
275
self.entry_group_state_changed_match = None
276
277
117
def rename(self):
278
118
"""Derived from the Avahi example code"""
279
119
if self.rename_count >= self.max_renames:
280
logger.critical("No suitable Zeroconf service name found"
281
" after %i retries, exiting.",
282
self.rename_count)
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
283
122
raise AvahiServiceError("Too many renames")
284
self.name = unicode(self.server
285
.GetAlternativeServiceName(self.name))
286
logger.info("Changing Zeroconf service name to %r ...",
287
self.name)
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
288
125
self.remove()
289
try:
290
self.add()
291
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
293
self.cleanup()
294
os._exit(1)
126
self.add()
295
127
self.rename_count += 1
296
297
128
def remove(self):
298
129
"""Derived from the Avahi example code"""
299
if self.entry_group_state_changed_match is not None:
300
self.entry_group_state_changed_match.remove()
301
self.entry_group_state_changed_match = None
302
if self.group is not None:
303
self.group.Reset()
304
130
if group is not None:
131
group.Reset()
305
132
def add(self):
306
133
"""Derived from the Avahi example code"""
307
self.remove()
308
if self.group is None:
309
self.group = dbus.Interface(
310
self.bus.get_object(avahi.DBUS_NAME,
311
self.server.EntryGroupNew()),
312
avahi.DBUS_INTERFACE_ENTRY_GROUP)
313
self.entry_group_state_changed_match = (
314
self.group.connect_to_signal(
315
'StateChanged', self.entry_group_state_changed))
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
317
self.name, self.type)
318
self.group.AddService(
319
self.interface,
320
self.protocol,
321
dbus.UInt32(0), # flags
322
self.name, self.type,
323
self.domain, self.host,
324
dbus.UInt16(self.port),
325
avahi.string_array_to_txt_array(self.TXT))
326
self.group.Commit()
327
328
def entry_group_state_changed(self, state, error):
329
"""Derived from the Avahi example code"""
330
logger.debug("Avahi entry group state change: %i", state)
331
332
if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
logger.debug("Zeroconf service established.")
334
elif state == avahi.ENTRY_GROUP_COLLISION:
335
logger.info("Zeroconf service name collision.")
336
self.rename()
337
elif state == avahi.ENTRY_GROUP_FAILURE:
338
logger.critical("Avahi: Error in group state changed %s",
339
unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
343
def cleanup(self):
344
"""Derived from the Avahi example code"""
345
if self.group is not None:
346
try:
347
self.group.Free()
348
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
350
pass
351
self.group = None
352
self.remove()
353
354
def server_state_changed(self, state, error=None):
355
"""Derived from the Avahi example code"""
356
logger.debug("Avahi server state change: %i", state)
357
bad_states = { avahi.SERVER_INVALID:
358
"Zeroconf server invalid",
359
avahi.SERVER_REGISTERING: None,
360
avahi.SERVER_COLLISION:
361
"Zeroconf server name collision",
362
avahi.SERVER_FAILURE:
363
"Zeroconf server failure" }
364
if state in bad_states:
365
if bad_states[state] is not None:
366
if error is None:
367
logger.error(bad_states[state])
368
else:
369
logger.error(bad_states[state] + ": %r", error)
370
self.cleanup()
371
elif state == avahi.SERVER_RUNNING:
372
self.add()
373
else:
374
if error is None:
375
logger.debug("Unknown state: %r", state)
376
else:
377
logger.debug("Unknown state: %r: %r", state, error)
378
379
def activate(self):
380
"""Derived from the Avahi example code"""
381
if self.server is None:
382
self.server = dbus.Interface(
383
self.bus.get_object(avahi.DBUS_NAME,
384
avahi.DBUS_PATH_SERVER,
385
follow_name_owner_changes=True),
386
avahi.DBUS_INTERFACE_SERVER)
387
self.server.connect_to_signal("StateChanged",
388
self.server_state_changed)
389
self.server_state_changed(self.server.GetState())
390
391
392
class AvahiServiceToSyslog(AvahiService):
393
def rename(self):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
400
return ret
401
402
403
def timedelta_to_milliseconds(td):
404
"Convert a datetime.timedelta() to milliseconds"
405
return ((td.days * 24 * 60 * 60 * 1000)
406
+ (td.seconds * 1000)
407
+ (td.microseconds // 1000))
134
global group
135
if group is None:
136
group = dbus.Interface\
137
(bus.get_object(avahi.DBUS_NAME,
138
server.EntryGroupNew()),
139
avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
group.connect_to_signal('StateChanged',
141
entry_group_state_changed)
142
logger.debug(u"Adding service '%s' of type '%s' ...",
143
service.name, service.type)
144
group.AddService(
145
self.interface, # interface
146
avahi.PROTO_INET6, # protocol
147
dbus.UInt32(0), # flags
148
self.name, self.type,
149
self.domain, self.host,
150
dbus.UInt16(self.port),
151
avahi.string_array_to_txt_array(self.TXT))
152
group.Commit()
153
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
408
157
409
158
410
159
class Client(object):
411
160
"""A representation of a client host served by this server.
412
413
161
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
162
name: string; from the config file, used in log messages
163
fingerprint: string (40 or 32 hexadecimal digits); used to
164
uniquely identify the client
165
secret: bytestring; sent verbatim (over TLS) to client
166
fqdn: string (FQDN); available for use by the checker command
167
created: datetime.datetime(); object creation, not client host
168
last_checked_ok: datetime.datetime() or None if not yet checked OK
169
timeout: datetime.timedelta(); How long from last_checked_ok
170
until this client is invalid
171
interval: datetime.timedelta(); How often to start a new checker
172
stop_hook: If set, called by stop() as stop_hook(self)
173
checker: subprocess.Popen(); a running checker process used
174
to see if the client lives.
175
'None' if no process is running.
176
checker_initiator_tag: a gobject event source tag, or None
177
stop_initiator_tag: - '' -
178
checker_callback_tag: - '' -
179
checker_command: string; External command which is run to check if
180
client lives. %() expansions are done at
423
181
runtime with vars(self) as dict, so that for
424
182
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
432
fingerprint: string (40 or 32 hexadecimal digits); used to
433
uniquely identify the client
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
183
Private attibutes:
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
452
188
"""
453
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
470
def timeout_milliseconds(self):
471
"Return the 'timeout' attribute in milliseconds"
472
return timedelta_to_milliseconds(self.timeout)
473
474
def extended_timeout_milliseconds(self):
475
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
477
478
def interval_milliseconds(self):
479
"Return the 'interval' attribute in milliseconds"
480
return timedelta_to_milliseconds(self.interval)
481
482
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
189
def _set_timeout(self, timeout):
190
"Setter function for 'timeout' attribute"
191
self._timeout = timeout
192
self._timeout_milliseconds = ((self.timeout.days
193
* 24 * 60 * 60 * 1000)
194
+ (self.timeout.seconds * 1000)
195
+ (self.timeout.microseconds
196
// 1000))
197
timeout = property(lambda self: self._timeout,
198
_set_timeout)
199
del _set_timeout
200
def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
202
self._interval = interval
203
self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
208
// 1000))
209
interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
212
def __init__(self, name = None, stop_hook=None, config={}):
213
"""Note: the 'checker' key in 'config' sets the
214
'checker_command' attribute and *not* the 'checker'
215
attribute."""
533
216
self.name = name
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
551
logger.debug("Creating client %r", self.name)
217
logger.debug(u"Creating client %r", self.name)
552
218
# Uppercase and remove spaces from fingerprint for later
553
219
# comparison purposes with return value from the fingerprint()
554
220
# function
555
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# attributes specific for this server instance
221
self.fingerprint = config["fingerprint"].upper()\
222
.replace(u" ", u"")
223
logger.debug(u" Fingerprint: %s", self.fingerprint)
224
if "secret" in config:
225
self.secret = config["secret"].decode(u"base64")
226
elif "secfile" in config:
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
230
else:
231
raise TypeError(u"No secret or secfile for client %s"
232
% self.name)
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
235
self.last_checked_ok = None
236
self.timeout = string_to_delta(config["timeout"])
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
560
239
self.checker = None
561
240
self.checker_initiator_tag = None
562
self.disable_initiator_tag = None
241
self.stop_initiator_tag = None
563
242
self.checker_callback_tag = None
564
self.current_checker_command = None
565
self.approved = None
566
self.approvals_pending = 0
567
self.changedstate = (multiprocessing_manager
568
.Condition(multiprocessing_manager
569
.Lock()))
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
573
self.client_structure.append("client_structure")
574
575
for name, t in inspect.getmembers(type(self),
576
lambda obj:
577
isinstance(obj,
578
property)):
579
if not name.startswith("_"):
580
self.client_structure.append(name)
581
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
586
587
def enable(self):
243
self.check_command = config["checker"]
244
def start(self):
588
245
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
590
# Already enabled
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
594
self.last_enabled = datetime.datetime.utcnow()
595
self.init_checker()
596
self.send_changedstate()
597
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
601
return False
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
611
self.stop_checker()
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
616
return False
617
618
def __del__(self):
619
self.disable()
620
621
def init_checker(self):
622
246
# Schedule a new checker to be started an 'interval' from now,
623
247
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
self.checker_initiator_tag = (gobject.timeout_add
627
(self.interval_milliseconds(),
628
self.start_checker))
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
self.disable_initiator_tag = (gobject.timeout_add
633
(self.timeout_milliseconds(),
634
self.disable))
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
635
251
# Also start a new checker *right now*.
636
252
self.start_checker()
637
638
def checker_callback(self, pid, condition, command):
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
266
return False
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
270
if getattr(self, "checker_initiator_tag", False):
271
gobject.source_remove(self.checker_initiator_tag)
272
self.checker_initiator_tag = None
273
self.stop_checker()
274
if self.stop_hook:
275
self.stop_hook(self)
276
# Do not run this again if called by a gobject.timeout_add
277
return False
278
def __del__(self):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
639
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
640
284
self.checker_callback_tag = None
641
285
self.checker = None
642
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
646
vars(self))
647
self.checked_ok()
648
else:
649
logger.info("Checker for %(name)s failed",
650
vars(self))
651
else:
652
self.last_checker_status = -1
653
logger.warning("Checker for %(name)s crashed?",
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
288
logger.info(u"Checker for %(name)s succeeded",
289
vars(self))
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
295
elif not os.WIFEXITED(condition):
296
logger.warning(u"Checker for %(name)s crashed?",
654
297
vars(self))
655
656
def checked_ok(self):
657
"""Assert that the client has been seen, alive and well."""
658
self.last_checked_ok = datetime.datetime.utcnow()
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
664
if timeout is None:
665
timeout = self.timeout
666
if self.disable_initiator_tag is not None:
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
if getattr(self, "enabled", False):
670
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
672
(timeout), self.disable))
673
self.expires = datetime.datetime.utcnow() + timeout
674
675
def need_approval(self):
676
self.last_approval_request = datetime.datetime.utcnow()
677
298
else:
299
logger.info(u"Checker for %(name)s failed",
300
vars(self))
678
301
def start_checker(self):
679
302
"""Start a new checker subprocess if one is not running.
680
681
303
If a checker already exists, leave it running and do
682
304
nothing."""
683
305
# The reason for not killing a running checker is that if we
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
306
# did that, then if a checker (for some reason) started
307
# running slowly and taking more than 'interval' time, the
308
# client would inevitably timeout, since no checker would get
309
# a chance to run to completion. If we instead leave running
688
310
# checkers alone, the checker would have to take more time
689
# than 'timeout' for the client to be disabled, which is as it
690
# should be.
691
692
# If a checker exists, make sure it is not a zombie
693
try:
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
700
else:
701
if pid:
702
logger.warning("Checker was a zombie")
703
gobject.source_remove(self.checker_callback_tag)
704
self.checker_callback(pid, status,
705
self.current_checker_command)
706
# Start a new checker if needed
311
# than 'timeout' for the client to be declared invalid, which
312
# is as it should be.
707
313
if self.checker is None:
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
713
try:
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
719
self.current_checker_command = command
720
try:
721
logger.info("Starting checker %r for %s",
314
try:
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
317
except TypeError:
318
# Escape attributes for the shell
319
escaped_attrs = dict((key, re.escape(str(val)))
320
for key, val in
321
vars(self).iteritems())
322
try:
323
command = self.check_command % escaped_attrs
324
except TypeError, error:
325
logger.error(u'Could not format string "%s":'
326
u' %s', self.check_command, error)
327
return True # Try again later
328
try:
329
logger.info(u"Starting checker %r for %s",
722
330
command, self.name)
723
# We don't need to redirect stdout and stderr, since
724
# in normal mode, that is already done by daemon(),
725
# and in debug mode we don't want to. (Stdin is
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
735
331
self.checker = subprocess.Popen(command,
736
332
close_fds=True,
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
333
shell=True, cwd="/")
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
338
logger.error(u"Failed to start subprocess: %s",
339
error)
761
340
# Re-run this periodically if run by gobject.timeout_add
762
341
return True
763
764
342
def stop_checker(self):
765
343
"""Force the checker process, if any, to stop."""
766
344
if self.checker_callback_tag:
770
348
return
771
349
logger.debug("Stopping checker for %(name)s", vars(self))
772
350
try:
773
self.checker.terminate()
774
#time.sleep(0.5)
351
os.kill(self.checker.pid, signal.SIGTERM)
352
#os.sleep(0.5)
775
353
#if self.checker.poll() is None:
776
# self.checker.kill()
777
except OSError as error:
354
# os.kill(self.checker.pid, signal.SIGKILL)
355
except OSError, error:
778
356
if error.errno != errno.ESRCH: # No such process
779
357
raise
780
358
self.checker = None
781
782
783
def dbus_service_property(dbus_interface, signature="v",
784
access="readwrite", byte_arrays=False):
785
"""Decorators for marking methods of a DBusObjectWithProperties to
786
become properties on the D-Bus.
787
788
The decorated method will be called with no arguments by "Get"
789
and with one argument by "Set".
790
791
The parameters, where they are supported, are the same as
792
dbus.service.method, except there is only "signature", since the
793
type from Get() and the type sent to Set() is the same.
794
"""
795
# Encoding deeply encoded byte arrays is not supported yet by the
796
# "Set" method, so we fail early here:
797
if byte_arrays and signature != "ay":
798
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
800
def decorator(func):
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
return func
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
850
class DBusPropertyException(dbus.exceptions.DBusException):
851
"""A base class for D-Bus property-related exceptions
852
"""
853
def __unicode__(self):
854
return unicode(str(self))
855
856
857
class DBusPropertyAccessException(DBusPropertyException):
858
"""A property's access permissions disallows an operation.
859
"""
860
pass
861
862
863
class DBusPropertyNotFound(DBusPropertyException):
864
"""An attempt was made to access a non-existing property.
865
"""
866
pass
867
868
869
class DBusObjectWithProperties(dbus.service.Object):
870
"""A D-Bus object with properties.
871
872
Classes inheriting from this can use the dbus_service_property
873
decorator to expose methods as D-Bus properties. It exposes the
874
standard Get(), Set(), and GetAll() methods on the D-Bus.
875
"""
876
877
@staticmethod
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
886
887
def _get_all_dbus_things(self, thing):
888
"""Returns a generator of (name, attribute) pairs
889
"""
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
893
for cls in self.__class__.__mro__
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
897
898
def _get_dbus_property(self, interface_name, property_name):
899
"""Returns a bound method if one exists which is a D-Bus
900
property with the specified name and interface.
901
"""
902
for cls in self.__class__.__mro__:
903
for name, value in (inspect.getmembers
904
(cls,
905
self._is_dbus_thing("property"))):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
+ interface_name + "."
913
+ property_name)
914
915
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
947
out_signature="a{sv}")
948
def GetAll(self, interface_name):
949
"""Standard D-Bus property GetAll() method, see D-Bus
950
standard.
951
952
Note: Will not include properties with access="write".
953
"""
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
956
if (interface_name
957
and interface_name != prop._dbus_interface):
958
# Interface non-empty but did not match
959
continue
960
# Ignore write-only properties
961
if prop._dbus_access == "write":
962
continue
963
value = prop()
964
if not hasattr(value, "variant_level"):
965
properties[name] = value
966
continue
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
970
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
out_signature="s",
973
path_keyword='object_path',
974
connection_keyword='connection')
975
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
979
"""
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
connection)
982
try:
983
document = xml.dom.minidom.parseString(xmlstring)
984
def make_tag(document, name, prop):
985
e = document.createElement("property")
986
e.setAttribute("name", name)
987
e.setAttribute("type", prop._dbus_signature)
988
e.setAttribute("access", prop._dbus_access)
989
return e
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
for tag in (make_tag(document, name, prop)
993
for name, prop
994
in self._get_all_dbus_things("property")
995
if prop._dbus_interface
996
== if_tag.getAttribute("name")):
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
# Add the names to the return values for the
1030
# "org.freedesktop.DBus.Properties" methods
1031
if (if_tag.getAttribute("name")
1032
== "org.freedesktop.DBus.Properties"):
1033
for cn in if_tag.getElementsByTagName("method"):
1034
if cn.getAttribute("name") == "Get":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1037
== "out"):
1038
arg.setAttribute("name", "value")
1039
elif cn.getAttribute("name") == "GetAll":
1040
for arg in cn.getElementsByTagName("arg"):
1041
if (arg.getAttribute("direction")
1042
== "out"):
1043
arg.setAttribute("name", "props")
1044
xmlstring = document.toxml("utf-8")
1045
document.unlink()
1046
except (AttributeError, xml.dom.DOMException,
1047
xml.parsers.expat.ExpatError) as error:
1048
logger.error("Failed to override Introspection method",
1049
exc_info=error)
1050
return xmlstring
1051
1052
1053
def datetime_to_dbus(dt, variant_level=0):
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1055
if dt is None:
1056
return dbus.String("", variant_level = variant_level)
1057
return dbus.String(dt.isoformat(),
1058
variant_level=variant_level)
1059
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
1083
"""
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
# with the wrong interface name
1093
if (not hasattr(attribute, "_dbus_interface")
1094
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
1096
continue
1097
# Create an alternate D-Bus interface name based on
1098
# the current name
1099
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
1103
# Is this a D-Bus signal?
1104
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
1107
nonmethod_func = (dict(
1108
zip(attribute.func_code.co_freevars,
1109
attribute.__closure__))["func"]
1110
.cell_contents)
1111
# Create a new, but exactly alike, function
1112
# object, and decorate it to be a new D-Bus signal
1113
# with the alternate D-Bus interface name
1114
new_function = (dbus.service.signal
1115
(alt_interface,
1116
attribute._dbus_signature)
1117
(types.FunctionType(
1118
nonmethod_func.func_code,
1119
nonmethod_func.func_globals,
1120
nonmethod_func.func_name,
1121
nonmethod_func.func_defaults,
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
1129
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
1133
def fixscope(func1, func2):
1134
"""This function is a scope container to pass
1135
func1 and func2 to the "call_both" function
1136
outside of its arguments"""
1137
def call_both(*args, **kwargs):
1138
"""This function will emit two D-Bus
1139
signals by calling func1 and func2"""
1140
func1(*args, **kwargs)
1141
func2(*args, **kwargs)
1142
return call_both
1143
# Create the "call_both" function and add it to
1144
# the class
1145
attr[attrname] = fixscope(attribute, new_function)
1146
# Is this a D-Bus method?
1147
elif getattr(attribute, "_dbus_is_method", False):
1148
# Create a new, but exactly alike, function
1149
# object. Decorate it to be a new D-Bus method
1150
# with the alternate D-Bus interface name. Add it
1151
# to the class.
1152
attr[attrname] = (dbus.service.method
1153
(alt_interface,
1154
attribute._dbus_in_signature,
1155
attribute._dbus_out_signature)
1156
(types.FunctionType
1157
(attribute.func_code,
1158
attribute.func_globals,
1159
attribute.func_name,
1160
attribute.func_defaults,
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
1168
# Is this a D-Bus property?
1169
elif getattr(attribute, "_dbus_is_property", False):
1170
# Create a new, but exactly alike, function
1171
# object, and decorate it to be a new D-Bus
1172
# property with the alternate D-Bus interface
1173
# name. Add it to the class.
1174
attr[attrname] = (dbus_service_property
1175
(alt_interface,
1176
attribute._dbus_signature,
1177
attribute._dbus_access,
1178
attribute
1179
._dbus_get_args_options
1180
["byte_arrays"])
1181
(types.FunctionType
1182
(attribute.func_code,
1183
attribute.func_globals,
1184
attribute.func_name,
1185
attribute.func_defaults,
1186
attribute.func_closure)))
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
1232
class ClientDBus(Client, DBusObjectWithProperties):
1233
"""A Client class using D-Bus
1234
1235
Attributes:
1236
dbus_object_path: dbus.ObjectPath
1237
bus: dbus.SystemBus()
1238
"""
1239
1240
runtime_expansions = (Client.runtime_expansions
1241
+ ("dbus_object_path",))
1242
1243
# dbus.service.Object doesn't use super(), so we can't either.
1244
1245
def __init__(self, bus = None, *args, **kwargs):
1246
self.bus = bus
1247
Client.__init__(self, *args, **kwargs)
1248
# Only now, when this client is initialized, can it show up on
1249
# the D-Bus
1250
client_object_name = unicode(self.name).translate(
1251
{ord("."): ord("_"),
1252
ord("-"): ord("_")})
1253
self.dbus_object_path = (dbus.ObjectPath
1254
("/clients/" + client_object_name))
1255
DBusObjectWithProperties.__init__(self, self.bus,
1256
self.dbus_object_path)
1257
1258
def notifychangeproperty(transform_func,
1259
dbus_name, type_func=lambda x: x,
1260
variant_level=1):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1270
"""
1271
attrname = "_{0}".format(dbus_name)
1272
def setter(self, value):
1273
if hasattr(self, "dbus_object_path"):
1274
if (not hasattr(self, attrname) or
1275
type_func(getattr(self, attrname, None))
1276
!= type_func(value)):
1277
dbus_value = transform_func(type_func(value),
1278
variant_level
1279
=variant_level)
1280
self.PropertyChanged(dbus.String(dbus_name),
1281
dbus_value)
1282
setattr(self, attrname, value)
1283
1284
return property(lambda self: getattr(self, attrname), setter)
1285
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
1288
"ApprovalPending",
1289
type_func = bool)
1290
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
last_enabled = notifychangeproperty(datetime_to_dbus,
1292
"LastEnabled")
1293
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
type_func = lambda checker:
1295
checker is not None)
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
last_approval_request = notifychangeproperty(
1301
datetime_to_dbus, "LastApprovalRequest")
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1305
"ApprovalDelay",
1306
type_func =
1307
timedelta_to_milliseconds)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func =
1314
timedelta_to_milliseconds)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
timedelta_to_milliseconds)
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1323
1324
del notifychangeproperty
1325
1326
def __del__(self, *args, **kwargs):
1327
try:
1328
self.remove_from_connection()
1329
except LookupError:
1330
pass
1331
if hasattr(DBusObjectWithProperties, "__del__"):
1332
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
Client.__del__(self, *args, **kwargs)
1334
1335
def checker_callback(self, pid, condition, command,
1336
*args, **kwargs):
1337
self.checker_callback_tag = None
1338
self.checker = None
1339
if os.WIFEXITED(condition):
1340
exitstatus = os.WEXITSTATUS(condition)
1341
# Emit D-Bus signal
1342
self.CheckerCompleted(dbus.Int16(exitstatus),
1343
dbus.Int64(condition),
1344
dbus.String(command))
1345
else:
1346
# Emit D-Bus signal
1347
self.CheckerCompleted(dbus.Int16(-1),
1348
dbus.Int64(condition),
1349
dbus.String(command))
1350
1351
return Client.checker_callback(self, pid, condition, command,
1352
*args, **kwargs)
1353
1354
def start_checker(self, *args, **kwargs):
1355
old_checker = self.checker
1356
if self.checker is not None:
1357
old_checker_pid = self.checker.pid
1358
else:
1359
old_checker_pid = None
1360
r = Client.start_checker(self, *args, **kwargs)
1361
# Only if new checker process was started
1362
if (self.checker is not None
1363
and old_checker_pid != self.checker.pid):
1364
# Emit D-Bus signal
1365
self.CheckerStarted(self.current_checker_command)
1366
return r
1367
1368
def _reset_approved(self):
1369
self.approved = None
1370
return False
1371
1372
def approve(self, value=True):
1373
self.approved = value
1374
gobject.timeout_add(timedelta_to_milliseconds
1375
(self.approval_duration),
1376
self._reset_approved)
1377
self.send_changedstate()
1378
1379
## D-Bus methods, signals & properties
1380
_interface = "se.recompile.Mandos.Client"
1381
1382
## Interfaces
1383
1384
@dbus_interface_annotations(_interface)
1385
def _foo(self):
1386
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1387
"false"}
1388
1389
## Signals
1390
1391
# CheckerCompleted - signal
1392
@dbus.service.signal(_interface, signature="nxs")
1393
def CheckerCompleted(self, exitcode, waitstatus, command):
1394
"D-Bus signal"
1395
pass
1396
1397
# CheckerStarted - signal
1398
@dbus.service.signal(_interface, signature="s")
1399
def CheckerStarted(self, command):
1400
"D-Bus signal"
1401
pass
1402
1403
# PropertyChanged - signal
1404
@dbus.service.signal(_interface, signature="sv")
1405
def PropertyChanged(self, property, value):
1406
"D-Bus signal"
1407
pass
1408
1409
# GotSecret - signal
1410
@dbus.service.signal(_interface)
1411
def GotSecret(self):
1412
"""D-Bus signal
1413
Is sent after a successful transfer of secret from the Mandos
1414
server to mandos-client
1415
"""
1416
pass
1417
1418
# Rejected - signal
1419
@dbus.service.signal(_interface, signature="s")
1420
def Rejected(self, reason):
1421
"D-Bus signal"
1422
pass
1423
1424
# NeedApproval - signal
1425
@dbus.service.signal(_interface, signature="tb")
1426
def NeedApproval(self, timeout, default):
1427
"D-Bus signal"
1428
return self.need_approval()
1429
1430
## Methods
1431
1432
# Approve - method
1433
@dbus.service.method(_interface, in_signature="b")
1434
def Approve(self, value):
1435
self.approve(value)
1436
1437
# CheckedOK - method
1438
@dbus.service.method(_interface)
1439
def CheckedOK(self):
1440
self.checked_ok()
1441
1442
# Enable - method
1443
@dbus.service.method(_interface)
1444
def Enable(self):
1445
"D-Bus method"
1446
self.enable()
1447
1448
# StartChecker - method
1449
@dbus.service.method(_interface)
1450
def StartChecker(self):
1451
"D-Bus method"
1452
self.start_checker()
1453
1454
# Disable - method
1455
@dbus.service.method(_interface)
1456
def Disable(self):
1457
"D-Bus method"
1458
self.disable()
1459
1460
# StopChecker - method
1461
@dbus.service.method(_interface)
1462
def StopChecker(self):
1463
self.stop_checker()
1464
1465
## Properties
1466
1467
# ApprovalPending - property
1468
@dbus_service_property(_interface, signature="b", access="read")
1469
def ApprovalPending_dbus_property(self):
1470
return dbus.Boolean(bool(self.approvals_pending))
1471
1472
# ApprovedByDefault - property
1473
@dbus_service_property(_interface, signature="b",
1474
access="readwrite")
1475
def ApprovedByDefault_dbus_property(self, value=None):
1476
if value is None: # get
1477
return dbus.Boolean(self.approved_by_default)
1478
self.approved_by_default = bool(value)
1479
1480
# ApprovalDelay - property
1481
@dbus_service_property(_interface, signature="t",
1482
access="readwrite")
1483
def ApprovalDelay_dbus_property(self, value=None):
1484
if value is None: # get
1485
return dbus.UInt64(self.approval_delay_milliseconds())
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1490
access="readwrite")
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(timedelta_to_milliseconds(
1494
self.approval_duration))
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
1497
# Name - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1501
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1506
1507
# Host - property
1508
@dbus_service_property(_interface, signature="s",
1509
access="readwrite")
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = unicode(value)
1514
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1519
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1524
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1527
access="readwrite")
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1531
if value:
1532
self.enable()
1533
else:
1534
self.disable()
1535
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1538
access="readwrite")
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1541
self.checked_ok()
1542
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1555
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1560
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout_milliseconds())
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
timedelta_to_milliseconds(self.expires - now),
1584
self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout_milliseconds())
1592
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1593
1594
# Interval - property
1595
@dbus_service_property(_interface, signature="t",
1596
access="readwrite")
1597
def Interval_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.UInt64(self.interval_milliseconds())
1600
self.interval = datetime.timedelta(0, 0, 0, value)
1601
if getattr(self, "checker_initiator_tag", None) is None:
1602
return
1603
if self.enabled:
1604
# Reschedule checker run
1605
gobject.source_remove(self.checker_initiator_tag)
1606
self.checker_initiator_tag = (gobject.timeout_add
1607
(value, self.start_checker))
1608
self.start_checker() # Start one now, too
1609
1610
# Checker - property
1611
@dbus_service_property(_interface, signature="s",
1612
access="readwrite")
1613
def Checker_dbus_property(self, value=None):
1614
if value is None: # get
1615
return dbus.String(self.checker_command)
1616
self.checker_command = unicode(value)
1617
1618
# CheckerRunning - property
1619
@dbus_service_property(_interface, signature="b",
1620
access="readwrite")
1621
def CheckerRunning_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.Boolean(self.checker is not None)
1624
if value:
1625
self.start_checker()
1626
else:
1627
self.stop_checker()
1628
1629
# ObjectPath - property
1630
@dbus_service_property(_interface, signature="o", access="read")
1631
def ObjectPath_dbus_property(self):
1632
return self.dbus_object_path # is already a dbus.ObjectPath
1633
1634
# Secret = property
1635
@dbus_service_property(_interface, signature="ay",
1636
access="write", byte_arrays=True)
1637
def Secret_dbus_property(self, value):
1638
self.secret = str(value)
1639
1640
del _interface
1641
1642
1643
class ProxyClient(object):
1644
def __init__(self, child_pipe, fpr, address):
1645
self._pipe = child_pipe
1646
self._pipe.send(('init', fpr, address))
1647
if not self._pipe.recv():
1648
raise KeyError()
1649
1650
def __getattribute__(self, name):
1651
if name == '_pipe':
1652
return super(ProxyClient, self).__getattribute__(name)
1653
self._pipe.send(('getattr', name))
1654
data = self._pipe.recv()
1655
if data[0] == 'data':
1656
return data[1]
1657
if data[0] == 'function':
1658
def func(*args, **kwargs):
1659
self._pipe.send(('funcall', name, args, kwargs))
1660
return self._pipe.recv()[1]
1661
return func
1662
1663
def __setattr__(self, name, value):
1664
if name == '_pipe':
1665
return super(ProxyClient, self).__setattr__(name, value)
1666
self._pipe.send(('setattr', name, value))
1667
1668
1669
class ClientHandler(socketserver.BaseRequestHandler, object):
1670
"""A class to handle client connections.
1671
1672
Instantiated once for each connection to handle it.
359
def still_valid(self):
360
"""Has the timeout not yet passed for this client?"""
361
now = datetime.datetime.now()
362
if self.last_checked_ok is None:
363
return now < (self.created + self.timeout)
364
else:
365
return now < (self.last_checked_ok + self.timeout)
366
367
368
def peer_certificate(session):
369
"Return the peer's OpenPGP certificate as a bytestring"
370
# If not an OpenPGP certificate...
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
374
# ...do the normal thing
375
return session.peer_certificate
376
list_size = ctypes.c_uint()
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
379
if list_size.value == 0:
380
return None
381
cert = cert_list[0]
382
return ctypes.string_at(cert.data, cert.size)
383
384
385
def fingerprint(openpgp):
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
# New GnuTLS "datum" with the OpenPGP public key
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
392
# New empty GnuTLS certificate
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
396
# Import the OpenPGP public key into the certificate
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
400
# New buffer for the fingerprint
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
403
# Get the fingerprint from the certificate into the buffer
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
406
# Deinit the certificate
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
# Convert the buffer to a Python bytestring
409
fpr = ctypes.string_at(buffer, buffer_length.value)
410
# Convert the bytestring to hexadecimal notation
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
return hex_fpr
413
414
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
1673
418
Note: This will run in its own forked process."""
1674
419
1675
420
def handle(self):
1676
with contextlib.closing(self.server.child_pipe) as child_pipe:
1677
logger.info("TCP connection from: %s",
1678
unicode(self.client_address))
1679
logger.debug("Pipe FD: %d",
1680
self.server.child_pipe.fileno())
1681
1682
session = (gnutls.connection
1683
.ClientSession(self.request,
1684
gnutls.connection
1685
.X509Credentials()))
1686
1687
# Note: gnutls.connection.X509Credentials is really a
1688
# generic GnuTLS certificate credentials object so long as
1689
# no X.509 keys are added to it. Therefore, we can use it
1690
# here despite using OpenPGP certificates.
1691
1692
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1693
# "+AES-256-CBC", "+SHA1",
1694
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
# "+DHE-DSS"))
1696
# Use a fallback default, since this MUST be set.
1697
priority = self.server.gnutls_priority
1698
if priority is None:
1699
priority = "NORMAL"
1700
(gnutls.library.functions
1701
.gnutls_priority_set_direct(session._c_object,
1702
priority, None))
1703
1704
# Start communication using the Mandos protocol
1705
# Get protocol number
1706
line = self.request.makefile().readline()
1707
logger.debug("Protocol version: %r", line)
1708
try:
1709
if int(line.strip().split()[0]) > 1:
1710
raise RuntimeError(line)
1711
except (ValueError, IndexError, RuntimeError) as error:
1712
logger.error("Unknown protocol version: %s", error)
1713
return
1714
1715
# Start GnuTLS connection
1716
try:
1717
session.handshake()
1718
except gnutls.errors.GNUTLSError as error:
1719
logger.warning("Handshake failed: %s", error)
1720
# Do not run session.bye() here: the session is not
1721
# established. Just abandon the request.
1722
return
1723
logger.debug("Handshake succeeded")
1724
1725
approval_required = False
1726
try:
1727
try:
1728
fpr = self.fingerprint(self.peer_certificate
1729
(session))
1730
except (TypeError,
1731
gnutls.errors.GNUTLSError) as error:
1732
logger.warning("Bad certificate: %s", error)
1733
return
1734
logger.debug("Fingerprint: %s", fpr)
1735
1736
try:
1737
client = ProxyClient(child_pipe, fpr,
1738
self.client_address)
1739
except KeyError:
1740
return
1741
1742
if client.approval_delay:
1743
delay = client.approval_delay
1744
client.approvals_pending += 1
1745
approval_required = True
1746
1747
while True:
1748
if not client.enabled:
1749
logger.info("Client %s is disabled",
1750
client.name)
1751
if self.server.use_dbus:
1752
# Emit D-Bus signal
1753
client.Rejected("Disabled")
1754
return
1755
1756
if client.approved or not client.approval_delay:
1757
#We are approved or approval is disabled
1758
break
1759
elif client.approved is None:
1760
logger.info("Client %s needs approval",
1761
client.name)
1762
if self.server.use_dbus:
1763
# Emit D-Bus signal
1764
client.NeedApproval(
1765
client.approval_delay_milliseconds(),
1766
client.approved_by_default)
1767
else:
1768
logger.warning("Client %s was not approved",
1769
client.name)
1770
if self.server.use_dbus:
1771
# Emit D-Bus signal
1772
client.Rejected("Denied")
1773
return
1774
1775
#wait until timeout or approved
1776
time = datetime.datetime.now()
1777
client.changedstate.acquire()
1778
client.changedstate.wait(
1779
float(timedelta_to_milliseconds(delay)
1780
/ 1000))
1781
client.changedstate.release()
1782
time2 = datetime.datetime.now()
1783
if (time2 - time) >= delay:
1784
if not client.approved_by_default:
1785
logger.warning("Client %s timed out while"
1786
" waiting for approval",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.Rejected("Approval timed out")
1791
return
1792
else:
1793
break
1794
else:
1795
delay -= time2 - time
1796
1797
sent_size = 0
1798
while sent_size < len(client.secret):
1799
try:
1800
sent = session.send(client.secret[sent_size:])
1801
except gnutls.errors.GNUTLSError as error:
1802
logger.warning("gnutls send failed",
1803
exc_info=error)
1804
return
1805
logger.debug("Sent: %d, remaining: %d",
1806
sent, len(client.secret)
1807
- (sent_size + sent))
1808
sent_size += sent
1809
1810
logger.info("Sending secret to %s", client.name)
1811
# bump the timeout using extended_timeout
1812
client.bump_timeout(client.extended_timeout)
1813
if self.server.use_dbus:
1814
# Emit D-Bus signal
1815
client.GotSecret()
1816
1817
finally:
1818
if approval_required:
1819
client.approvals_pending -= 1
1820
try:
1821
session.bye()
1822
except gnutls.errors.GNUTLSError as error:
1823
logger.warning("GnuTLS bye failed",
1824
exc_info=error)
1825
1826
@staticmethod
1827
def peer_certificate(session):
1828
"Return the peer's OpenPGP certificate as a bytestring"
1829
# If not an OpenPGP certificate...
1830
if (gnutls.library.functions
1831
.gnutls_certificate_type_get(session._c_object)
1832
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1833
# ...do the normal thing
1834
return session.peer_certificate
1835
list_size = ctypes.c_uint(1)
1836
cert_list = (gnutls.library.functions
1837
.gnutls_certificate_get_peers
1838
(session._c_object, ctypes.byref(list_size)))
1839
if not bool(cert_list) and list_size.value != 0:
1840
raise gnutls.errors.GNUTLSError("error getting peer"
1841
" certificate")
1842
if list_size.value == 0:
1843
return None
1844
cert = cert_list[0]
1845
return ctypes.string_at(cert.data, cert.size)
1846
1847
@staticmethod
1848
def fingerprint(openpgp):
1849
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1850
# New GnuTLS "datum" with the OpenPGP public key
1851
datum = (gnutls.library.types
1852
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1853
ctypes.POINTER
1854
(ctypes.c_ubyte)),
1855
ctypes.c_uint(len(openpgp))))
1856
# New empty GnuTLS certificate
1857
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1858
(gnutls.library.functions
1859
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1860
# Import the OpenPGP public key into the certificate
1861
(gnutls.library.functions
1862
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1863
gnutls.library.constants
1864
.GNUTLS_OPENPGP_FMT_RAW))
1865
# Verify the self signature in the key
1866
crtverify = ctypes.c_uint()
1867
(gnutls.library.functions
1868
.gnutls_openpgp_crt_verify_self(crt, 0,
1869
ctypes.byref(crtverify)))
1870
if crtverify.value != 0:
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1872
raise (gnutls.errors.CertificateSecurityError
1873
("Verify failed"))
1874
# New buffer for the fingerprint
1875
buf = ctypes.create_string_buffer(20)
1876
buf_len = ctypes.c_size_t()
1877
# Get the fingerprint from the certificate into the buffer
1878
(gnutls.library.functions
1879
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1880
ctypes.byref(buf_len)))
1881
# Deinit the certificate
1882
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1883
# Convert the buffer to a Python bytestring
1884
fpr = ctypes.string_at(buf, buf_len.value)
1885
# Convert the bytestring to hexadecimal notation
1886
hex_fpr = binascii.hexlify(fpr).upper()
1887
return hex_fpr
1888
1889
1890
class MultiprocessingMixIn(object):
1891
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1892
def sub_process_main(self, request, address):
1893
try:
1894
self.finish_request(request, address)
1895
except Exception:
1896
self.handle_error(request, address)
1897
self.close_request(request)
1898
1899
def process_request(self, request, address):
1900
"""Start a new process to process the request."""
1901
proc = multiprocessing.Process(target = self.sub_process_main,
1902
args = (request, address))
1903
proc.start()
1904
return proc
1905
1906
1907
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1908
""" adds a pipe to the MixIn """
1909
def process_request(self, request, client_address):
1910
"""Overrides and wraps the original process_request().
1911
1912
This function creates a new pipe in self.pipe
1913
"""
1914
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1915
1916
proc = MultiprocessingMixIn.process_request(self, request,
1917
client_address)
1918
self.child_pipe.close()
1919
self.add_pipe(parent_pipe, proc)
1920
1921
def add_pipe(self, parent_pipe, proc):
1922
"""Dummy function; override as necessary"""
1923
raise NotImplementedError()
1924
1925
1926
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1927
socketserver.TCPServer, object):
1928
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1929
421
logger.info(u"TCP connection from: %s",
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
425
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
428
try:
429
if int(line.strip().split()[0]) > 1:
430
raise RuntimeError
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
433
return
434
435
# Note: gnutls.connection.X509Credentials is really a generic
436
# GnuTLS certificate credentials object so long as no X.509
437
# keys are added to it. Therefore, we can use it here despite
438
# using OpenPGP certificates.
439
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
# "+DHE-DSS"))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
449
450
try:
451
session.handshake()
452
except gnutls.errors.GNUTLSError, error:
453
logger.warning(u"Handshake failed: %s", error)
454
# Do not run session.bye() here: the session is not
455
# established. Just abandon the request.
456
return
457
try:
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
461
session.bye()
462
return
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
467
client = c
468
break
469
if not client:
470
logger.warning(u"Client not found for fingerprint: %s",
471
fpr)
472
session.bye()
473
return
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
476
# session.
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
479
vars(client))
480
session.bye()
481
return
482
sent_size = 0
483
while sent_size < len(client.secret):
484
sent = session.send(client.secret[sent_size:])
485
logger.debug(u"Sent: %d, remaining: %d",
486
sent, len(client.secret)
487
- (sent_size + sent))
488
sent_size += sent
489
session.bye()
490
491
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1930
494
Attributes:
1931
enabled: Boolean; whether this server is activated yet
1932
interface: None or a network interface name (string)
1933
use_ipv6: Boolean; to use IPv6 or not
495
settings: Server settings
496
clients: Set() of Client objects
1934
497
"""
1935
def __init__(self, server_address, RequestHandlerClass,
1936
interface=None, use_ipv6=True, socketfd=None):
1937
"""If socketfd is set, use that file descriptor instead of
1938
creating a new one with socket.socket().
1939
"""
1940
self.interface = interface
1941
if use_ipv6:
1942
self.address_family = socket.AF_INET6
1943
if socketfd is not None:
1944
# Save the file descriptor
1945
self.socketfd = socketfd
1946
# Save the original socket.socket() function
1947
self.socket_socket = socket.socket
1948
# To implement --socket, we monkey patch socket.socket.
1949
#
1950
# (When socketserver.TCPServer is a new-style class, we
1951
# could make self.socket into a property instead of monkey
1952
# patching socket.socket.)
1953
#
1954
# Create a one-time-only replacement for socket.socket()
1955
@functools.wraps(socket.socket)
1956
def socket_wrapper(*args, **kwargs):
1957
# Restore original function so subsequent calls are
1958
# not affected.
1959
socket.socket = self.socket_socket
1960
del self.socket_socket
1961
# This time only, return a new socket object from the
1962
# saved file descriptor.
1963
return socket.fromfd(self.socketfd, *args, **kwargs)
1964
# Replace socket.socket() function with wrapper
1965
socket.socket = socket_wrapper
1966
# The socketserver.TCPServer.__init__ will call
1967
# socket.socket(), which might be our replacement,
1968
# socket_wrapper(), if socketfd was set.
1969
socketserver.TCPServer.__init__(self, server_address,
1970
RequestHandlerClass)
1971
498
address_family = socket.AF_INET6
499
def __init__(self, *args, **kwargs):
500
if "settings" in kwargs:
501
self.settings = kwargs["settings"]
502
del kwargs["settings"]
503
if "clients" in kwargs:
504
self.clients = kwargs["clients"]
505
del kwargs["clients"]
506
return super(type(self), self).__init__(*args, **kwargs)
1972
507
def server_bind(self):
1973
508
"""This overrides the normal server_bind() function
1974
509
to bind to an interface if one was specified, and also NOT to
1975
510
bind to an address or port if they were not specified."""
1976
if self.interface is not None:
1977
if SO_BINDTODEVICE is None:
1978
logger.error("SO_BINDTODEVICE does not exist;"
1979
" cannot bind to interface %s",
1980
self.interface)
1981
else:
1982
try:
1983
self.socket.setsockopt(socket.SOL_SOCKET,
1984
SO_BINDTODEVICE,
1985
str(self.interface + '\0'))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
else:
1998
raise
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
514
try:
515
self.socket.setsockopt(socket.SOL_SOCKET,
516
SO_BINDTODEVICE,
517
self.settings["interface"])
518
except socket.error, error:
519
if error[0] == errno.EPERM:
520
logger.error(u"No permission to"
521
u" bind to interface %s",
522
self.settings["interface"])
523
else:
524
raise error
1999
525
# Only bind(2) the socket if we really need to.
2000
526
if self.server_address[0] or self.server_address[1]:
2001
527
if not self.server_address[0]:
2002
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
2004
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
2006
self.server_address = (any_address,
528
in6addr_any = "::"
529
self.server_address = (in6addr_any,
2007
530
self.server_address[1])
2008
elif not self.server_address[1]:
531
elif self.server_address[1] is None:
2009
532
self.server_address = (self.server_address[0],
2010
533
0)
2011
# if self.interface:
2012
# self.server_address = (self.server_address[0],
2013
# 0, # port
2014
# 0, # flowinfo
2015
# if_nametoindex
2016
# (self.interface))
2017
return socketserver.TCPServer.server_bind(self)
2018
2019
2020
class MandosServer(IPv6_TCPServer):
2021
"""Mandos server.
2022
2023
Attributes:
2024
clients: set of Client objects
2025
gnutls_priority GnuTLS priority string
2026
use_dbus: Boolean; to emit D-Bus signals or not
2027
2028
Assumes a gobject.MainLoop event loop.
2029
"""
2030
def __init__(self, server_address, RequestHandlerClass,
2031
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
2033
self.enabled = False
2034
self.clients = clients
2035
if self.clients is None:
2036
self.clients = {}
2037
self.use_dbus = use_dbus
2038
self.gnutls_priority = gnutls_priority
2039
IPv6_TCPServer.__init__(self, server_address,
2040
RequestHandlerClass,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
2044
def server_activate(self):
2045
if self.enabled:
2046
return socketserver.TCPServer.server_activate(self)
2047
2048
def enable(self):
2049
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
2052
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
2066
return False
2067
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2071
2072
if command == 'init':
2073
fpr = request[1]
2074
address = request[2]
2075
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2078
client = c
2079
break
2080
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2083
if self.use_dbus:
2084
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
2087
parent_pipe.send(False)
2088
return False
2089
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
2101
return False
2102
if command == 'funcall':
2103
funcname = request[1]
2104
args = request[2]
2105
kwargs = request[3]
2106
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2115
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2118
2119
if command == 'setattr':
2120
attrname = request[1]
2121
value = request[2]
2122
setattr(client_object, attrname, value)
2123
2124
return True
2125
2126
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week))),
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset(token_duration,) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
534
return super(type(self), self).server_bind()
2224
535
2225
536
2226
537
def string_to_delta(interval):
2227
538
"""Parse a string and return a datetime.timedelta
2228
539
2229
540
>>> string_to_delta('7d')
2230
541
datetime.timedelta(7)
2231
542
>>> string_to_delta('60s')
2234
545
datetime.timedelta(0, 3600)
2235
546
>>> string_to_delta('24h')
2236
547
datetime.timedelta(1)
2237
>>> string_to_delta('1w')
548
>>> string_to_delta(u'1w')
2238
549
datetime.timedelta(7)
2239
>>> string_to_delta('5m 30s')
2240
datetime.timedelta(0, 330)
2241
550
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
2248
timevalue = datetime.timedelta(0)
2249
for s in interval.split():
2250
try:
2251
suffix = unicode(s[-1])
2252
value = int(s[:-1])
2253
if suffix == "d":
2254
delta = datetime.timedelta(value)
2255
elif suffix == "s":
2256
delta = datetime.timedelta(0, value)
2257
elif suffix == "m":
2258
delta = datetime.timedelta(0, 0, 0, 0, value)
2259
elif suffix == "h":
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2261
elif suffix == "w":
2262
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
else:
2264
raise ValueError("Unknown suffix {0!r}"
2265
.format(suffix))
2266
except IndexError as e:
2267
raise ValueError(*(e.args))
2268
timevalue += delta
2269
return timevalue
2270
2271
2272
def daemon(nochdir = False, noclose = False):
551
try:
552
suffix=unicode(interval[-1])
553
value=int(interval[:-1])
554
if suffix == u"d":
555
delta = datetime.timedelta(value)
556
elif suffix == u"s":
557
delta = datetime.timedelta(0, value)
558
elif suffix == u"m":
559
delta = datetime.timedelta(0, 0, 0, 0, value)
560
elif suffix == u"h":
561
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
elif suffix == u"w":
563
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
else:
565
raise ValueError
566
except (ValueError, IndexError):
567
raise ValueError
568
return delta
569
570
571
def server_state_changed(state):
572
"""Derived from the Avahi example code"""
573
if state == avahi.SERVER_COLLISION:
574
logger.error(u"Server name collision")
575
service.remove()
576
elif state == avahi.SERVER_RUNNING:
577
service.add()
578
579
580
def entry_group_state_changed(state, error):
581
"""Derived from the Avahi example code"""
582
logger.debug(u"state change: %i", state)
583
584
if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
logger.debug(u"Service established.")
586
elif state == avahi.ENTRY_GROUP_COLLISION:
587
logger.warning(u"Service name collision.")
588
service.rename()
589
elif state == avahi.ENTRY_GROUP_FAILURE:
590
logger.critical(u"Error in group state changed %s",
591
unicode(error))
592
raise AvahiGroupError("State changed: %s", str(error))
593
594
def if_nametoindex(interface):
595
"""Call the C function if_nametoindex(), or equivalent"""
596
global if_nametoindex
597
try:
598
if "ctypes.util" not in sys.modules:
599
import ctypes.util
600
if_nametoindex = ctypes.cdll.LoadLibrary\
601
(ctypes.util.find_library("c")).if_nametoindex
602
except (OSError, AttributeError):
603
if "struct" not in sys.modules:
604
import struct
605
if "fcntl" not in sys.modules:
606
import fcntl
607
def if_nametoindex(interface):
608
"Get an interface index the hard way, i.e. using fcntl()"
609
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
610
s = socket.socket()
611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
struct.pack("16s16x", interface))
613
s.close()
614
interface_index = struct.unpack("I", ifreq[16:20])[0]
615
return interface_index
616
return if_nametoindex(interface)
617
618
619
def daemon(nochdir, noclose):
2273
620
"""See daemon(3). Standard BSD Unix function.
2274
2275
621
This should really exist as os.daemon, but it doesn't (yet)."""
2276
622
if os.fork():
2277
623
sys.exit()
2282
628
sys.exit()
2283
629
if not noclose:
2284
630
# Close all standard open file descriptors
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
631
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
632
if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
633
raise OSError(errno.ENODEV,
2288
"{0} not a character device"
2289
.format(os.devnull))
634
"/dev/null not a character device")
2290
635
os.dup2(null, sys.stdin.fileno())
2291
636
os.dup2(null, sys.stdout.fileno())
2292
637
os.dup2(null, sys.stderr.fileno())
2295
640
2296
641
2297
642
def main():
2298
2299
##################################################################
2300
# Parsing of options, both command line and config file
2301
2302
parser = argparse.ArgumentParser()
2303
parser.add_argument("-v", "--version", action="version",
2304
version = "%(prog)s {0}".format(version),
2305
help="show version number and exit")
2306
parser.add_argument("-i", "--interface", metavar="IF",
2307
help="Bind to interface IF")
2308
parser.add_argument("-a", "--address",
2309
help="Address to listen for requests on")
2310
parser.add_argument("-p", "--port", type=int,
2311
help="Port number to receive requests on")
2312
parser.add_argument("--check", action="store_true",
2313
help="Run self-test")
2314
parser.add_argument("--debug", action="store_true",
2315
help="Debug mode; run in foreground and log"
2316
" to terminal", default=None)
2317
parser.add_argument("--debuglevel", metavar="LEVEL",
2318
help="Debug level for stdout output")
2319
parser.add_argument("--priority", help="GnuTLS"
2320
" priority string (see GnuTLS documentation)")
2321
parser.add_argument("--servicename",
2322
metavar="NAME", help="Zeroconf service name")
2323
parser.add_argument("--configdir",
2324
default="/etc/mandos", metavar="DIR",
2325
help="Directory to search for configuration"
2326
" files")
2327
parser.add_argument("--no-dbus", action="store_false",
2328
dest="use_dbus", help="Do not provide D-Bus"
2329
" system bus interface", default=None)
2330
parser.add_argument("--no-ipv6", action="store_false",
2331
dest="use_ipv6", help="Do not use IPv6",
2332
default=None)
2333
parser.add_argument("--no-restore", action="store_false",
2334
dest="restore", help="Do not restore stored"
2335
" state", default=None)
2336
parser.add_argument("--socket", type=int,
2337
help="Specify a file descriptor to a network"
2338
" socket to use instead of creating one")
2339
parser.add_argument("--statedir", metavar="DIR",
2340
help="Directory to save/restore state in")
2341
parser.add_argument("--foreground", action="store_true",
2342
help="Run in foreground", default=None)
2343
2344
options = parser.parse_args()
643
global main_loop_started
644
main_loop_started = False
645
646
parser = OptionParser()
647
parser.add_option("-i", "--interface", type="string",
648
metavar="IF", help="Bind to interface IF")
649
parser.add_option("-a", "--address", type="string",
650
help="Address to listen for requests on")
651
parser.add_option("-p", "--port", type="int",
652
help="Port number to receive requests on")
653
parser.add_option("--check", action="store_true", default=False,
654
help="Run self-test")
655
parser.add_option("--debug", action="store_true", default=False,
656
help="Debug mode; run in foreground and log to"
657
" terminal")
658
parser.add_option("--priority", type="string", help="GnuTLS"
659
" priority string (see GnuTLS documentation)")
660
parser.add_option("--servicename", type="string", metavar="NAME",
661
help="Zeroconf service name")
662
parser.add_option("--configdir", type="string",
663
default="/etc/mandos", metavar="DIR",
664
help="Directory to search for configuration"
665
" files")
666
(options, args) = parser.parse_args()
2345
667
2346
668
if options.check:
2347
669
import doctest
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
670
doctest.testmod()
671
sys.exit()
2350
672
2351
673
# Default values for config file for server-global settings
2352
674
server_defaults = { "interface": "",
2354
676
"port": "",
2355
677
"debug": "False",
2356
678
"priority":
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
679
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2358
680
"servicename": "Mandos",
2359
"use_dbus": "True",
2360
"use_ipv6": "True",
2361
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
2366
681
}
2367
682
2368
683
# Parse config file for server-global settings
2369
server_config = configparser.SafeConfigParser(server_defaults)
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
2370
685
del server_defaults
2371
server_config.read(os.path.join(options.configdir,
2372
"mandos.conf"))
686
server_config.read(os.path.join(options.configdir, "server.conf"))
687
server_section = "server"
2373
688
# Convert the SafeConfigParser object to a dict
2374
server_settings = server_config.defaults()
2375
# Use the appropriate methods on the non-string config options
2376
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2377
server_settings[option] = server_config.getboolean("DEFAULT",
2378
option)
2379
if server_settings["port"]:
2380
server_settings["port"] = server_config.getint("DEFAULT",
2381
"port")
2382
if server_settings["socket"]:
2383
server_settings["socket"] = server_config.getint("DEFAULT",
2384
"socket")
2385
# Later, stdin will, and stdout and stderr might, be dup'ed
2386
# over with an opened os.devnull. But we don't want this to
2387
# happen with a supplied network socket.
2388
if 0 <= server_settings["socket"] <= 2:
2389
server_settings["socket"] = os.dup(server_settings
2390
["socket"])
689
server_settings = dict(server_config.items(server_section))
690
# Use getboolean on the boolean config option
691
server_settings["debug"] = server_config.getboolean\
692
(server_section, "debug")
2391
693
del server_config
2392
694
2393
695
# Override the settings from the config file with command line
2394
696
# options, if set.
2395
697
for option in ("interface", "address", "port", "debug",
2396
"priority", "servicename", "configdir",
2397
"use_dbus", "use_ipv6", "debuglevel", "restore",
2398
"statedir", "socket", "foreground"):
698
"priority", "servicename", "configdir"):
2399
699
value = getattr(options, option)
2400
700
if value is not None:
2401
701
server_settings[option] = value
2402
702
del options
2403
# Force all strings to be unicode
2404
for option in server_settings.keys():
2405
if type(server_settings[option]) is str:
2406
server_settings[option] = unicode(server_settings[option])
2407
# Force all boolean options to be boolean
2408
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2409
"foreground"):
2410
server_settings[option] = bool(server_settings[option])
2411
# Debug implies foreground
2412
if server_settings["debug"]:
2413
server_settings["foreground"] = True
2414
703
# Now we have our good server settings in "server_settings"
2415
704
2416
##################################################################
2417
2418
# For convenience
2419
debug = server_settings["debug"]
2420
debuglevel = server_settings["debuglevel"]
2421
use_dbus = server_settings["use_dbus"]
2422
use_ipv6 = server_settings["use_ipv6"]
2423
stored_state_path = os.path.join(server_settings["statedir"],
2424
stored_state_file)
2425
foreground = server_settings["foreground"]
2426
2427
if debug:
2428
initlogger(debug, logging.DEBUG)
2429
else:
2430
if not debuglevel:
2431
initlogger(debug)
2432
else:
2433
level = getattr(logging, debuglevel.upper())
2434
initlogger(debug, level)
2435
2436
if server_settings["servicename"] != "Mandos":
2437
syslogger.setFormatter(logging.Formatter
2438
('Mandos ({0}) [%(process)d]:'
2439
' %(levelname)s: %(message)s'
2440
.format(server_settings
2441
["servicename"])))
2442
2443
705
# Parse config file with clients
2444
client_config = configparser.SafeConfigParser(Client
2445
.client_defaults)
706
client_defaults = { "timeout": "1h",
707
"interval": "5m",
708
"checker": "fping -q -- %%(fqdn)s",
709
}
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
2446
711
client_config.read(os.path.join(server_settings["configdir"],
2447
712
"clients.conf"))
2448
713
2449
global mandos_dbus_service
2450
mandos_dbus_service = None
2451
2452
tcp_server = MandosServer((server_settings["address"],
2453
server_settings["port"]),
2454
ClientHandler,
2455
interface=(server_settings["interface"]
2456
or None),
2457
use_ipv6=use_ipv6,
2458
gnutls_priority=
2459
server_settings["priority"],
2460
use_dbus=use_dbus,
2461
socketfd=(server_settings["socket"]
2462
or None))
2463
if not foreground:
2464
pidfilename = "/run/mandos.pid"
2465
if not os.path.isdir("/run/."):
2466
pidfilename = "/var/run/mandos.pid"
2467
pidfile = None
2468
try:
2469
pidfile = open(pidfilename, "w")
2470
except IOError as e:
2471
logger.error("Could not open file %r", pidfilename,
2472
exc_info=e)
2473
2474
for name in ("_mandos", "mandos", "nobody"):
2475
try:
2476
uid = pwd.getpwnam(name).pw_uid
2477
gid = pwd.getpwnam(name).pw_gid
2478
break
2479
except KeyError:
2480
continue
2481
else:
2482
uid = 65534
2483
gid = 65534
2484
try:
2485
os.setgid(gid)
2486
os.setuid(uid)
2487
except OSError as error:
2488
if error.errno != errno.EPERM:
2489
raise
2490
2491
if debug:
2492
# Enable all possible GnuTLS debugging
2493
2494
# "Use a log level over 10 to enable all debugging options."
2495
# - GnuTLS manual
2496
gnutls.library.functions.gnutls_global_set_log_level(11)
2497
2498
@gnutls.library.types.gnutls_log_func
2499
def debug_gnutls(level, string):
2500
logger.debug("GnuTLS: %s", string[:-1])
2501
2502
(gnutls.library.functions
2503
.gnutls_global_set_log_function(debug_gnutls))
2504
2505
# Redirect stdin so all checkers get /dev/null
2506
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2507
os.dup2(null, sys.stdin.fileno())
2508
if null > 2:
2509
os.close(null)
2510
2511
# Need to fork before connecting to D-Bus
2512
if not foreground:
2513
# Close all input and output, do double fork, etc.
2514
daemon()
2515
2516
# multiprocessing will use threads, so before we use gobject we
2517
# need to inform gobject that threads will be used.
2518
gobject.threads_init()
714
global service
715
service = AvahiService(name = server_settings["servicename"],
716
type = "_mandos._tcp", );
717
if server_settings["interface"]:
718
service.interface = if_nametoindex(server_settings["interface"])
2519
719
2520
720
global main_loop
721
global bus
722
global server
2521
723
# From the Avahi example code
2522
DBusGMainLoop(set_as_default=True)
724
DBusGMainLoop(set_as_default=True )
2523
725
main_loop = gobject.MainLoop()
2524
726
bus = dbus.SystemBus()
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
2525
730
# End of Avahi example code
2526
if use_dbus:
2527
try:
2528
bus_name = dbus.service.BusName("se.recompile.Mandos",
2529
bus, do_not_queue=True)
2530
old_bus_name = (dbus.service.BusName
2531
("se.bsnet.fukt.Mandos", bus,
2532
do_not_queue=True))
2533
except dbus.exceptions.NameExistsException as e:
2534
logger.error("Disabling D-Bus:", exc_info=e)
2535
use_dbus = False
2536
server_settings["use_dbus"] = False
2537
tcp_server.use_dbus = False
2538
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2539
service = AvahiServiceToSyslog(name =
2540
server_settings["servicename"],
2541
servicetype = "_mandos._tcp",
2542
protocol = protocol, bus = bus)
2543
if server_settings["interface"]:
2544
service.interface = (if_nametoindex
2545
(str(server_settings["interface"])))
2546
2547
global multiprocessing_manager
2548
multiprocessing_manager = multiprocessing.Manager()
2549
2550
client_class = Client
2551
if use_dbus:
2552
client_class = functools.partial(ClientDBus, bus = bus)
2553
2554
client_settings = Client.config_parser(client_config)
2555
old_client_settings = {}
2556
clients_data = {}
2557
2558
# This is used to redirect stdout and stderr for checker processes
2559
global wnull
2560
wnull = open(os.devnull, "w") # A writable /dev/null
2561
# Only used if server is running in foreground but not in debug
2562
# mode
2563
if debug or not foreground:
2564
wnull.close()
2565
2566
# Get client data and settings from last running state.
2567
if server_settings["restore"]:
2568
try:
2569
with open(stored_state_path, "rb") as stored_state:
2570
clients_data, old_client_settings = (pickle.load
2571
(stored_state))
2572
os.remove(stored_state_path)
2573
except IOError as e:
2574
if e.errno == errno.ENOENT:
2575
logger.warning("Could not load persistent state: {0}"
2576
.format(os.strerror(e.errno)))
2577
else:
2578
logger.critical("Could not load persistent state:",
2579
exc_info=e)
2580
raise
2581
except EOFError as e:
2582
logger.warning("Could not load persistent state: "
2583
"EOFError:", exc_info=e)
2584
2585
with PGPEngine() as pgp:
2586
for client_name, client in clients_data.iteritems():
2587
# Skip removed clients
2588
if client_name not in client_settings:
2589
continue
2590
2591
# Decide which value to use after restoring saved state.
2592
# We have three different values: Old config file,
2593
# new config file, and saved state.
2594
# New config value takes precedence if it differs from old
2595
# config value, otherwise use saved state.
2596
for name, value in client_settings[client_name].items():
2597
try:
2598
# For each value in new config, check if it
2599
# differs from the old config value (Except for
2600
# the "secret" attribute)
2601
if (name != "secret" and
2602
value != old_client_settings[client_name]
2603
[name]):
2604
client[name] = value
2605
except KeyError:
2606
pass
2607
2608
# Clients who has passed its expire date can still be
2609
# enabled if its last checker was successful. Clients
2610
# whose checker succeeded before we stored its state is
2611
# assumed to have successfully run all checkers during
2612
# downtime.
2613
if client["enabled"]:
2614
if datetime.datetime.utcnow() >= client["expires"]:
2615
if not client["last_checked_ok"]:
2616
logger.warning(
2617
"disabling client {0} - Client never "
2618
"performed a successful checker"
2619
.format(client_name))
2620
client["enabled"] = False
2621
elif client["last_checker_status"] != 0:
2622
logger.warning(
2623
"disabling client {0} - Client "
2624
"last checker failed with error code {1}"
2625
.format(client_name,
2626
client["last_checker_status"]))
2627
client["enabled"] = False
2628
else:
2629
client["expires"] = (datetime.datetime
2630
.utcnow()
2631
+ client["timeout"])
2632
logger.debug("Last checker succeeded,"
2633
" keeping {0} enabled"
2634
.format(client_name))
2635
try:
2636
client["secret"] = (
2637
pgp.decrypt(client["encrypted_secret"],
2638
client_settings[client_name]
2639
["secret"]))
2640
except PGPError:
2641
# If decryption fails, we use secret from new settings
2642
logger.debug("Failed to decrypt {0} old secret"
2643
.format(client_name))
2644
client["secret"] = (
2645
client_settings[client_name]["secret"])
2646
2647
# Add/remove clients based on new changes made to config
2648
for client_name in (set(old_client_settings)
2649
- set(client_settings)):
2650
del clients_data[client_name]
2651
for client_name in (set(client_settings)
2652
- set(old_client_settings)):
2653
clients_data[client_name] = client_settings[client_name]
2654
2655
# Create all client objects
2656
for client_name, client in clients_data.iteritems():
2657
tcp_server.clients[client_name] = client_class(
2658
name = client_name, settings = client,
2659
server_settings = server_settings)
2660
2661
if not tcp_server.clients:
2662
logger.warning("No clients defined")
2663
2664
if not foreground:
2665
if pidfile is not None:
2666
try:
2667
with pidfile:
2668
pid = os.getpid()
2669
pidfile.write(str(pid) + "\n".encode("utf-8"))
2670
except IOError:
2671
logger.error("Could not write to file %r with PID %d",
2672
pidfilename, pid)
2673
del pidfile
2674
del pidfilename
2675
2676
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2677
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2678
2679
if use_dbus:
2680
@alternate_dbus_interfaces({"se.recompile.Mandos":
2681
"se.bsnet.fukt.Mandos"})
2682
class MandosDBusService(DBusObjectWithProperties):
2683
"""A D-Bus proxy object"""
2684
def __init__(self):
2685
dbus.service.Object.__init__(self, bus, "/")
2686
_interface = "se.recompile.Mandos"
2687
2688
@dbus_interface_annotations(_interface)
2689
def _foo(self):
2690
return { "org.freedesktop.DBus.Property"
2691
".EmitsChangedSignal":
2692
"false"}
2693
2694
@dbus.service.signal(_interface, signature="o")
2695
def ClientAdded(self, objpath):
2696
"D-Bus signal"
2697
pass
2698
2699
@dbus.service.signal(_interface, signature="ss")
2700
def ClientNotFound(self, fingerprint, address):
2701
"D-Bus signal"
2702
pass
2703
2704
@dbus.service.signal(_interface, signature="os")
2705
def ClientRemoved(self, objpath, name):
2706
"D-Bus signal"
2707
pass
2708
2709
@dbus.service.method(_interface, out_signature="ao")
2710
def GetAllClients(self):
2711
"D-Bus method"
2712
return dbus.Array(c.dbus_object_path
2713
for c in
2714
tcp_server.clients.itervalues())
2715
2716
@dbus.service.method(_interface,
2717
out_signature="a{oa{sv}}")
2718
def GetAllClientsWithProperties(self):
2719
"D-Bus method"
2720
return dbus.Dictionary(
2721
((c.dbus_object_path, c.GetAll(""))
2722
for c in tcp_server.clients.itervalues()),
2723
signature="oa{sv}")
2724
2725
@dbus.service.method(_interface, in_signature="o")
2726
def RemoveClient(self, object_path):
2727
"D-Bus method"
2728
for c in tcp_server.clients.itervalues():
2729
if c.dbus_object_path == object_path:
2730
del tcp_server.clients[c.name]
2731
c.remove_from_connection()
2732
# Don't signal anything except ClientRemoved
2733
c.disable(quiet=True)
2734
# Emit D-Bus signal
2735
self.ClientRemoved(object_path, c.name)
2736
return
2737
raise KeyError(object_path)
2738
2739
del _interface
2740
2741
mandos_dbus_service = MandosDBusService()
731
732
debug = server_settings["debug"]
733
734
if debug:
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
740
del console
741
742
clients = Set()
743
def remove_from_clients(client):
744
clients.remove(client)
745
if not clients:
746
logger.critical(u"No clients left, exiting")
747
sys.exit()
748
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
751
config
752
= dict(client_config.items(section)))
753
for section in client_config.sections()))
754
755
if not debug:
756
daemon(False, False)
2742
757
2743
758
def cleanup():
2744
759
"Cleanup function; run on exit"
2745
service.cleanup()
2746
2747
multiprocessing.active_children()
2748
wnull.close()
2749
if not (tcp_server.clients or client_settings):
2750
return
2751
2752
# Store client before exiting. Secrets are encrypted with key
2753
# based on what config file has. If config file is
2754
# removed/edited, old secret will thus be unrecovable.
2755
clients = {}
2756
with PGPEngine() as pgp:
2757
for client in tcp_server.clients.itervalues():
2758
key = client_settings[client.name]["secret"]
2759
client.encrypted_secret = pgp.encrypt(client.secret,
2760
key)
2761
client_dict = {}
2762
2763
# A list of attributes that can not be pickled
2764
# + secret.
2765
exclude = set(("bus", "changedstate", "secret",
2766
"checker", "server_settings"))
2767
for name, typ in (inspect.getmembers
2768
(dbus.service.Object)):
2769
exclude.add(name)
2770
2771
client_dict["encrypted_secret"] = (client
2772
.encrypted_secret)
2773
for attr in client.client_structure:
2774
if attr not in exclude:
2775
client_dict[attr] = getattr(client, attr)
2776
2777
clients[client.name] = client_dict
2778
del client_settings[client.name]["secret"]
2779
2780
try:
2781
with (tempfile.NamedTemporaryFile
2782
(mode='wb', suffix=".pickle", prefix='clients-',
2783
dir=os.path.dirname(stored_state_path),
2784
delete=False)) as stored_state:
2785
pickle.dump((clients, client_settings), stored_state)
2786
tempname=stored_state.name
2787
os.rename(tempname, stored_state_path)
2788
except (IOError, OSError) as e:
2789
if not debug:
2790
try:
2791
os.remove(tempname)
2792
except NameError:
2793
pass
2794
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2795
logger.warning("Could not save persistent state: {0}"
2796
.format(os.strerror(e.errno)))
2797
else:
2798
logger.warning("Could not save persistent state:",
2799
exc_info=e)
2800
raise
2801
2802
# Delete all clients, and settings from config
2803
while tcp_server.clients:
2804
name, client = tcp_server.clients.popitem()
2805
if use_dbus:
2806
client.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
2808
client.disable(quiet=True)
2809
if use_dbus:
2810
# Emit D-Bus signal
2811
mandos_dbus_service.ClientRemoved(client
2812
.dbus_object_path,
2813
client.name)
2814
client_settings.clear()
760
global group
761
# From the Avahi example code
762
if not group is None:
763
group.Free()
764
group = None
765
# End of Avahi example code
766
767
while clients:
768
client = clients.pop()
769
client.stop_hook = None
770
client.stop()
2815
771
2816
772
atexit.register(cleanup)
2817
773
2818
for client in tcp_server.clients.itervalues():
2819
if use_dbus:
2820
# Emit D-Bus signal
2821
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2822
# Need to initiate checking of clients
2823
if client.enabled:
2824
client.init_checker()
2825
2826
tcp_server.enable()
2827
tcp_server.server_activate()
2828
774
if not debug:
775
signal.signal(signal.SIGINT, signal.SIG_IGN)
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
778
779
for client in clients:
780
client.start()
781
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
784
tcp_handler,
785
settings=server_settings,
786
clients=clients)
2829
787
# Find out what port we got
2830
788
service.port = tcp_server.socket.getsockname()[1]
2831
if use_ipv6:
2832
logger.info("Now listening on address %r, port %d,"
2833
" flowinfo %d, scope_id %d",
2834
*tcp_server.socket.getsockname())
2835
else: # IPv4
2836
logger.info("Now listening on address %r, port %d",
2837
*tcp_server.socket.getsockname())
789
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
790
u" scope_id %d" % tcp_server.socket.getsockname())
2838
791
2839
792
#service.interface = tcp_server.socket.getsockname()[3]
2840
793
2841
794
try:
2842
795
# From the Avahi example code
796
server.connect_to_signal("StateChanged", server_state_changed)
2843
797
try:
2844
service.activate()
2845
except dbus.exceptions.DBusException as error:
2846
logger.critical("D-Bus Exception", exc_info=error)
2847
cleanup()
798
server_state_changed(server.GetState())
799
except dbus.exceptions.DBusException, error:
800
logger.critical(u"DBusException: %s", error)
2848
801
sys.exit(1)
2849
802
# End of Avahi example code
2850
803
2851
804
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2852
805
lambda *args, **kwargs:
2853
(tcp_server.handle_request
2854
(*args[2:], **kwargs) or True))
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
2855
808
2856
809
logger.debug("Starting main loop")
810
main_loop_started = True
2857
811
main_loop.run()
2858
except AvahiError as error:
2859
logger.critical("Avahi Error", exc_info=error)
2860
cleanup()
812
except AvahiError, error:
813
logger.critical(u"AvahiError: %s" + unicode(error))
2861
814
sys.exit(1)
2862
815
except KeyboardInterrupt:
2863
816
if debug:
2864
print("", file=sys.stderr)
2865
logger.debug("Server received KeyboardInterrupt")
2866
logger.debug("Server exiting")
2867
# Must run before the D-Bus bus name gets deregistered
2868
cleanup()
817
print
2869
818
2870
819
if __name__ == '__main__':
2871
820
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0