238
99
max_renames: integer; maximum number of renames
239
100
rename_count: integer; counter so we only rename after collisions
240
101
a sensible number of times
241
group: D-Bus Entry Group
243
bus: dbus.SystemBus()
245
103
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
246
servicetype = None, port = None, TXT = None,
247
domain = "", host = "", max_renames = 32768,
248
protocol = avahi.PROTO_UNSPEC, bus = None):
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
249
106
self.interface = interface
251
self.type = servicetype
253
self.TXT = TXT if TXT is not None else []
254
114
self.domain = domain
256
116
self.rename_count = 0
257
self.max_renames = max_renames
258
self.protocol = protocol
259
self.group = None # our entry group
262
self.entry_group_state_changed_match = None
263
117
def rename(self):
264
118
"""Derived from the Avahi example code"""
265
119
if self.rename_count >= self.max_renames:
266
logger.critical("No suitable Zeroconf service name found"
267
" after %i retries, exiting.",
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
269
122
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
272
logger.info("Changing Zeroconf service name to %r ...",
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
277
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
281
127
self.rename_count += 1
282
128
def remove(self):
283
129
"""Derived from the Avahi example code"""
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
287
if self.group is not None:
130
if group is not None:
290
133
"""Derived from the Avahi example code"""
292
if self.group is None:
293
self.group = dbus.Interface(
294
self.bus.get_object(avahi.DBUS_NAME,
295
self.server.EntryGroupNew()),
296
avahi.DBUS_INTERFACE_ENTRY_GROUP)
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
301
self.name, self.type)
302
self.group.AddService(
305
dbus.UInt32(0), # flags
306
self.name, self.type,
307
self.domain, self.host,
308
dbus.UInt16(self.port),
309
avahi.string_array_to_txt_array(self.TXT))
311
def entry_group_state_changed(self, state, error):
312
"""Derived from the Avahi example code"""
313
logger.debug("Avahi entry group state change: %i", state)
315
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
logger.debug("Zeroconf service established.")
317
elif state == avahi.ENTRY_GROUP_COLLISION:
318
logger.info("Zeroconf service name collision.")
320
elif state == avahi.ENTRY_GROUP_FAILURE:
321
logger.critical("Avahi: Error in group state changed %s",
323
raise AvahiGroupError("State changed: %s"
326
"""Derived from the Avahi example code"""
327
if self.group is not None:
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
335
def server_state_changed(self, state, error=None):
336
"""Derived from the Avahi example code"""
337
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
348
logger.error(bad_states[state])
350
logger.error(bad_states[state] + ": %r", error)
352
elif state == avahi.SERVER_RUNNING:
356
logger.debug("Unknown state: %r", state)
358
logger.debug("Unknown state: %r: %r", state, error)
360
"""Derived from the Avahi example code"""
361
if self.server is None:
362
self.server = dbus.Interface(
363
self.bus.get_object(avahi.DBUS_NAME,
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
366
avahi.DBUS_INTERFACE_SERVER)
367
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
369
self.server_state_changed(self.server.GetState())
371
class AvahiServiceToSyslog(AvahiService):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
381
def _timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
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)
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))
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
387
159
class Client(object):
388
160
"""A representation of a client host served by this server.
391
_approved: bool(); 'None' if not yet approved/disapproved
392
approval_delay: datetime.timedelta(); Time to wait for approval
393
approval_duration: datetime.timedelta(); Duration of one approval
394
checker: subprocess.Popen(); a running checker process used
395
to see if the client lives.
396
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
398
checker_command: string; External command which is run to check
399
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
400
181
runtime with vars(self) as dict, so that for
401
182
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
403
created: datetime.datetime(); (UTC) object creation
404
client_structure: Object describing what attributes a client has
405
and is used for storing the client at exit
406
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
409
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
411
host: string; available for use by the checker command
412
interval: datetime.timedelta(); How often to start a new checker
413
last_approval_request: datetime.datetime(); (UTC) or None
414
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
436
def timeout_milliseconds(self):
437
"Return the 'timeout' attribute in milliseconds"
438
return _timedelta_to_milliseconds(self.timeout)
440
def extended_timeout_milliseconds(self):
441
"Return the 'extended_timeout' attribute in milliseconds"
442
return _timedelta_to_milliseconds(self.extended_timeout)
444
def interval_milliseconds(self):
445
"Return the 'interval' attribute in milliseconds"
446
return _timedelta_to_milliseconds(self.interval)
448
def approval_delay_milliseconds(self):
449
return _timedelta_to_milliseconds(self.approval_delay)
451
def __init__(self, name = None, config=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
197
timeout = property(lambda self: self._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
207
+ (self.interval.microseconds
209
interval = property(lambda self: self._interval,
212
def __init__(self, name = None, stop_hook=None, config={}):
452
213
"""Note: the 'checker' key in 'config' sets the
453
214
'checker_command' attribute and *not* the 'checker'
458
logger.debug("Creating client %r", self.name)
217
logger.debug(u"Creating client %r", self.name)
459
218
# Uppercase and remove spaces from fingerprint for later
460
219
# comparison purposes with return value from the fingerprint()
462
self.fingerprint = (config["fingerprint"].upper()
464
logger.debug(" Fingerprint: %s", self.fingerprint)
221
self.fingerprint = config["fingerprint"].upper()\
223
logger.debug(u" Fingerprint: %s", self.fingerprint)
465
224
if "secret" in config:
466
self.secret = config["secret"].decode("base64")
225
self.secret = config["secret"].decode(u"base64")
467
226
elif "secfile" in config:
468
with open(os.path.expanduser(os.path.expandvars
469
(config["secfile"])),
471
self.secret = secfile.read()
227
sf = open(config["secfile"])
228
self.secret = sf.read()
473
raise TypeError("No secret or secfile for client %s"
231
raise TypeError(u"No secret or secfile for client %s"
475
self.host = config.get("host", "")
476
self.created = datetime.datetime.utcnow()
477
self.enabled = config.get("enabled", True)
478
self.last_approval_request = None
480
self.last_enabled = datetime.datetime.utcnow()
482
self.last_enabled = None
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
483
235
self.last_checked_ok = None
484
self.last_checker_status = None
485
236
self.timeout = string_to_delta(config["timeout"])
486
self.extended_timeout = string_to_delta(config
487
["extended_timeout"])
488
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
489
239
self.checker = None
490
240
self.checker_initiator_tag = None
491
self.disable_initiator_tag = None
493
self.expires = datetime.datetime.utcnow() + self.timeout
241
self.stop_initiator_tag = None
496
242
self.checker_callback_tag = None
497
self.checker_command = config["checker"]
498
self.current_checker_command = None
499
self._approved = None
500
self.approved_by_default = config.get("approved_by_default",
502
self.approvals_pending = 0
503
self.approval_delay = string_to_delta(
504
config["approval_delay"])
505
self.approval_duration = string_to_delta(
506
config["approval_duration"])
507
self.changedstate = (multiprocessing_manager
508
.Condition(multiprocessing_manager
510
self.client_structure = [attr for attr in
511
self.__dict__.iterkeys()
512
if not attr.startswith("_")]
513
self.client_structure.append("client_structure")
515
for name, t in inspect.getmembers(type(self),
519
if not name.startswith("_"):
520
self.client_structure.append(name)
522
# Send notice to process children that client state has changed
523
def send_changedstate(self):
524
with self.changedstate:
525
self.changedstate.notify_all()
243
self.check_command = config["checker"]
528
245
"""Start this client's checker and timeout hooks"""
529
if getattr(self, "enabled", False):
532
self.send_changedstate()
533
self.expires = datetime.datetime.utcnow() + self.timeout
535
self.last_enabled = datetime.datetime.utcnow()
538
def disable(self, quiet=True):
539
"""Disable this client."""
540
if not getattr(self, "enabled", False):
246
# Schedule a new checker to be started an 'interval' from now,
247
# and every interval from then on.
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
251
# Also start a new checker *right now*.
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
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.
263
logger.info(u"Stopping client %s", self.name)
543
self.send_changedstate()
545
logger.info("Disabling client %s", self.name)
546
if getattr(self, "disable_initiator_tag", False):
547
gobject.source_remove(self.disable_initiator_tag)
548
self.disable_initiator_tag = None
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
550
270
if getattr(self, "checker_initiator_tag", False):
551
271
gobject.source_remove(self.checker_initiator_tag)
552
272
self.checker_initiator_tag = None
553
273
self.stop_checker()
555
276
# Do not run this again if called by a gobject.timeout_add
558
278
def __del__(self):
561
def init_checker(self):
562
# Schedule a new checker to be started an 'interval' from now,
563
# and every interval from then on.
564
self.checker_initiator_tag = (gobject.timeout_add
565
(self.interval_milliseconds(),
567
# Schedule a disable() when 'timeout' has passed
568
self.disable_initiator_tag = (gobject.timeout_add
569
(self.timeout_milliseconds(),
571
# Also start a new checker *right now*.
574
def checker_callback(self, pid, condition, command):
279
self.stop_hook = None
281
def checker_callback(self, pid, condition):
575
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
576
284
self.checker_callback_tag = None
577
285
self.checker = None
578
if os.WIFEXITED(condition):
579
self.last_checker_status = os.WEXITSTATUS(condition)
580
if self.last_checker_status == 0:
581
logger.info("Checker for %(name)s succeeded",
585
logger.info("Checker for %(name)s failed",
588
self.last_checker_status = -1
589
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",
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,
295
elif not os.WIFEXITED(condition):
296
logger.warning(u"Checker for %(name)s crashed?",
592
def checked_ok(self, timeout=None):
593
"""Bump up the timeout for this client.
595
This should only be called when the client has been seen,
599
timeout = self.timeout
600
self.last_checked_ok = datetime.datetime.utcnow()
601
if self.disable_initiator_tag is not None:
602
gobject.source_remove(self.disable_initiator_tag)
603
if getattr(self, "enabled", False):
604
self.disable_initiator_tag = (gobject.timeout_add
605
(_timedelta_to_milliseconds
606
(timeout), self.disable))
607
self.expires = datetime.datetime.utcnow() + timeout
609
def need_approval(self):
610
self.last_approval_request = datetime.datetime.utcnow()
299
logger.info(u"Checker for %(name)s failed",
612
301
def start_checker(self):
613
302
"""Start a new checker subprocess if one is not running.
615
303
If a checker already exists, leave it running and do
617
305
# The reason for not killing a running checker is that if we
694
349
logger.debug("Stopping checker for %(name)s", vars(self))
696
351
os.kill(self.checker.pid, signal.SIGTERM)
698
353
#if self.checker.poll() is None:
699
354
# os.kill(self.checker.pid, signal.SIGKILL)
700
except OSError as error:
355
except OSError, error:
701
356
if error.errno != errno.ESRCH: # No such process
703
358
self.checker = None
706
def dbus_service_property(dbus_interface, signature="v",
707
access="readwrite", byte_arrays=False):
708
"""Decorators for marking methods of a DBusObjectWithProperties to
709
become properties on the D-Bus.
711
The decorated method will be called with no arguments by "Get"
712
and with one argument by "Set".
714
The parameters, where they are supported, are the same as
715
dbus.service.method, except there is only "signature", since the
716
type from Get() and the type sent to Set() is the same.
718
# Encoding deeply encoded byte arrays is not supported yet by the
719
# "Set" method, so we fail early here:
720
if byte_arrays and signature != "ay":
721
raise ValueError("Byte arrays not supported for non-'ay'"
722
" signature %r" % signature)
724
func._dbus_is_property = True
725
func._dbus_interface = dbus_interface
726
func._dbus_signature = signature
727
func._dbus_access = access
728
func._dbus_name = func.__name__
729
if func._dbus_name.endswith("_dbus_property"):
730
func._dbus_name = func._dbus_name[:-14]
731
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
736
class DBusPropertyException(dbus.exceptions.DBusException):
737
"""A base class for D-Bus property-related exceptions
739
def __unicode__(self):
740
return unicode(str(self))
743
class DBusPropertyAccessException(DBusPropertyException):
744
"""A property's access permissions disallows an operation.
749
class DBusPropertyNotFound(DBusPropertyException):
750
"""An attempt was made to access a non-existing property.
755
class DBusObjectWithProperties(dbus.service.Object):
756
"""A D-Bus object with properties.
758
Classes inheriting from this can use the dbus_service_property
759
decorator to expose methods as D-Bus properties. It exposes the
760
standard Get(), Set(), and GetAll() methods on the D-Bus.
764
def _is_dbus_property(obj):
765
return getattr(obj, "_dbus_is_property", False)
767
def _get_all_dbus_properties(self):
768
"""Returns a generator of (name, attribute) pairs
770
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
771
for cls in self.__class__.__mro__
773
inspect.getmembers(cls, self._is_dbus_property))
775
def _get_dbus_property(self, interface_name, property_name):
776
"""Returns a bound method if one exists which is a D-Bus
777
property with the specified name and interface.
779
for cls in self.__class__.__mro__:
780
for name, value in (inspect.getmembers
781
(cls, self._is_dbus_property)):
782
if (value._dbus_name == property_name
783
and value._dbus_interface == interface_name):
784
return value.__get__(self)
787
raise DBusPropertyNotFound(self.dbus_object_path + ":"
788
+ interface_name + "."
791
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
793
def Get(self, interface_name, property_name):
794
"""Standard D-Bus property Get() method, see D-Bus standard.
796
prop = self._get_dbus_property(interface_name, property_name)
797
if prop._dbus_access == "write":
798
raise DBusPropertyAccessException(property_name)
800
if not hasattr(value, "variant_level"):
802
return type(value)(value, variant_level=value.variant_level+1)
804
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
805
def Set(self, interface_name, property_name, value):
806
"""Standard D-Bus property Set() method, see D-Bus standard.
808
prop = self._get_dbus_property(interface_name, property_name)
809
if prop._dbus_access == "read":
810
raise DBusPropertyAccessException(property_name)
811
if prop._dbus_get_args_options["byte_arrays"]:
812
# The byte_arrays option is not supported yet on
813
# signatures other than "ay".
814
if prop._dbus_signature != "ay":
816
value = dbus.ByteArray(''.join(unichr(byte)
820
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
821
out_signature="a{sv}")
822
def GetAll(self, interface_name):
823
"""Standard D-Bus property GetAll() method, see D-Bus
826
Note: Will not include properties with access="write".
829
for name, prop in self._get_all_dbus_properties():
831
and interface_name != prop._dbus_interface):
832
# Interface non-empty but did not match
834
# Ignore write-only properties
835
if prop._dbus_access == "write":
838
if not hasattr(value, "variant_level"):
839
properties[name] = value
841
properties[name] = type(value)(value, variant_level=
842
value.variant_level+1)
843
return dbus.Dictionary(properties, signature="sv")
845
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
847
path_keyword='object_path',
848
connection_keyword='connection')
849
def Introspect(self, object_path, connection):
850
"""Standard D-Bus method, overloaded to insert property tags.
852
xmlstring = dbus.service.Object.Introspect(self, object_path,
855
document = xml.dom.minidom.parseString(xmlstring)
856
def make_tag(document, name, prop):
857
e = document.createElement("property")
858
e.setAttribute("name", name)
859
e.setAttribute("type", prop._dbus_signature)
860
e.setAttribute("access", prop._dbus_access)
862
for if_tag in document.getElementsByTagName("interface"):
863
for tag in (make_tag(document, name, prop)
865
in self._get_all_dbus_properties()
866
if prop._dbus_interface
867
== if_tag.getAttribute("name")):
868
if_tag.appendChild(tag)
869
# Add the names to the return values for the
870
# "org.freedesktop.DBus.Properties" methods
871
if (if_tag.getAttribute("name")
872
== "org.freedesktop.DBus.Properties"):
873
for cn in if_tag.getElementsByTagName("method"):
874
if cn.getAttribute("name") == "Get":
875
for arg in cn.getElementsByTagName("arg"):
876
if (arg.getAttribute("direction")
878
arg.setAttribute("name", "value")
879
elif cn.getAttribute("name") == "GetAll":
880
for arg in cn.getElementsByTagName("arg"):
881
if (arg.getAttribute("direction")
883
arg.setAttribute("name", "props")
884
xmlstring = document.toxml("utf-8")
886
except (AttributeError, xml.dom.DOMException,
887
xml.parsers.expat.ExpatError) as error:
888
logger.error("Failed to override Introspection method",
893
def datetime_to_dbus (dt, variant_level=0):
894
"""Convert a UTC datetime.datetime() to a D-Bus type."""
896
return dbus.String("", variant_level = variant_level)
897
return dbus.String(dt.isoformat(),
898
variant_level=variant_level)
901
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
903
"""Applied to an empty subclass of a D-Bus object, this metaclass
904
will add additional D-Bus attributes matching a certain pattern.
906
def __new__(mcs, name, bases, attr):
907
# Go through all the base classes which could have D-Bus
908
# methods, signals, or properties in them
909
for base in (b for b in bases
910
if issubclass(b, dbus.service.Object)):
911
# Go though all attributes of the base class
912
for attrname, attribute in inspect.getmembers(base):
913
# Ignore non-D-Bus attributes, and D-Bus attributes
914
# with the wrong interface name
915
if (not hasattr(attribute, "_dbus_interface")
916
or not attribute._dbus_interface
917
.startswith("se.recompile.Mandos")):
919
# Create an alternate D-Bus interface name based on
921
alt_interface = (attribute._dbus_interface
922
.replace("se.recompile.Mandos",
923
"se.bsnet.fukt.Mandos"))
924
# Is this a D-Bus signal?
925
if getattr(attribute, "_dbus_is_signal", False):
926
# Extract the original non-method function by
928
nonmethod_func = (dict(
929
zip(attribute.func_code.co_freevars,
930
attribute.__closure__))["func"]
932
# Create a new, but exactly alike, function
933
# object, and decorate it to be a new D-Bus signal
934
# with the alternate D-Bus interface name
935
new_function = (dbus.service.signal
937
attribute._dbus_signature)
939
nonmethod_func.func_code,
940
nonmethod_func.func_globals,
941
nonmethod_func.func_name,
942
nonmethod_func.func_defaults,
943
nonmethod_func.func_closure)))
944
# Define a creator of a function to call both the
945
# old and new functions, so both the old and new
946
# signals gets sent when the function is called
947
def fixscope(func1, func2):
948
"""This function is a scope container to pass
949
func1 and func2 to the "call_both" function
950
outside of its arguments"""
951
def call_both(*args, **kwargs):
952
"""This function will emit two D-Bus
953
signals by calling func1 and func2"""
954
func1(*args, **kwargs)
955
func2(*args, **kwargs)
957
# Create the "call_both" function and add it to
959
attr[attrname] = fixscope(attribute,
961
# Is this a D-Bus method?
962
elif getattr(attribute, "_dbus_is_method", False):
963
# Create a new, but exactly alike, function
964
# object. Decorate it to be a new D-Bus method
965
# with the alternate D-Bus interface name. Add it
967
attr[attrname] = (dbus.service.method
969
attribute._dbus_in_signature,
970
attribute._dbus_out_signature)
972
(attribute.func_code,
973
attribute.func_globals,
975
attribute.func_defaults,
976
attribute.func_closure)))
977
# Is this a D-Bus property?
978
elif getattr(attribute, "_dbus_is_property", False):
979
# Create a new, but exactly alike, function
980
# object, and decorate it to be a new D-Bus
981
# property with the alternate D-Bus interface
982
# name. Add it to the class.
983
attr[attrname] = (dbus_service_property
985
attribute._dbus_signature,
986
attribute._dbus_access,
988
._dbus_get_args_options
991
(attribute.func_code,
992
attribute.func_globals,
994
attribute.func_defaults,
995
attribute.func_closure)))
996
return type.__new__(mcs, name, bases, attr)
999
class ClientDBus(Client, DBusObjectWithProperties):
1000
"""A Client class using D-Bus
1003
dbus_object_path: dbus.ObjectPath
1004
bus: dbus.SystemBus()
1007
runtime_expansions = (Client.runtime_expansions
1008
+ ("dbus_object_path",))
1010
# dbus.service.Object doesn't use super(), so we can't either.
1012
def __init__(self, bus = None, *args, **kwargs):
1014
Client.__init__(self, *args, **kwargs)
1016
self._approvals_pending = 0
1017
# Only now, when this client is initialized, can it show up on
1019
client_object_name = unicode(self.name).translate(
1020
{ord("."): ord("_"),
1021
ord("-"): ord("_")})
1022
self.dbus_object_path = (dbus.ObjectPath
1023
("/clients/" + client_object_name))
1024
DBusObjectWithProperties.__init__(self, self.bus,
1025
self.dbus_object_path)
1027
def notifychangeproperty(transform_func,
1028
dbus_name, type_func=lambda x: x,
1030
""" Modify a variable so that it's a property which announces
1031
its changes to DBus.
1033
transform_fun: Function that takes a value and a variant_level
1034
and transforms it to a D-Bus type.
1035
dbus_name: D-Bus name of the variable
1036
type_func: Function that transform the value before sending it
1037
to the D-Bus. Default: no transform
1038
variant_level: D-Bus variant level. Default: 1
1040
attrname = "_{0}".format(dbus_name)
1041
def setter(self, value):
1042
if hasattr(self, "dbus_object_path"):
1043
if (not hasattr(self, attrname) or
1044
type_func(getattr(self, attrname, None))
1045
!= type_func(value)):
1046
dbus_value = transform_func(type_func(value),
1049
self.PropertyChanged(dbus.String(dbus_name),
1051
setattr(self, attrname, value)
1053
return property(lambda self: getattr(self, attrname), setter)
1056
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1057
approvals_pending = notifychangeproperty(dbus.Boolean,
1060
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1061
last_enabled = notifychangeproperty(datetime_to_dbus,
1063
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1064
type_func = lambda checker:
1065
checker is not None)
1066
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1068
last_approval_request = notifychangeproperty(
1069
datetime_to_dbus, "LastApprovalRequest")
1070
approved_by_default = notifychangeproperty(dbus.Boolean,
1071
"ApprovedByDefault")
1072
approval_delay = notifychangeproperty(dbus.UInt16,
1075
_timedelta_to_milliseconds)
1076
approval_duration = notifychangeproperty(
1077
dbus.UInt16, "ApprovalDuration",
1078
type_func = _timedelta_to_milliseconds)
1079
host = notifychangeproperty(dbus.String, "Host")
1080
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1082
_timedelta_to_milliseconds)
1083
extended_timeout = notifychangeproperty(
1084
dbus.UInt16, "ExtendedTimeout",
1085
type_func = _timedelta_to_milliseconds)
1086
interval = notifychangeproperty(dbus.UInt16,
1089
_timedelta_to_milliseconds)
1090
checker_command = notifychangeproperty(dbus.String, "Checker")
1092
del notifychangeproperty
1094
def __del__(self, *args, **kwargs):
1096
self.remove_from_connection()
1099
if hasattr(DBusObjectWithProperties, "__del__"):
1100
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1101
Client.__del__(self, *args, **kwargs)
1103
def checker_callback(self, pid, condition, command,
1105
self.checker_callback_tag = None
1107
if os.WIFEXITED(condition):
1108
exitstatus = os.WEXITSTATUS(condition)
1110
self.CheckerCompleted(dbus.Int16(exitstatus),
1111
dbus.Int64(condition),
1112
dbus.String(command))
1115
self.CheckerCompleted(dbus.Int16(-1),
1116
dbus.Int64(condition),
1117
dbus.String(command))
1119
return Client.checker_callback(self, pid, condition, command,
1122
def start_checker(self, *args, **kwargs):
1123
old_checker = self.checker
1124
if self.checker is not None:
1125
old_checker_pid = self.checker.pid
1127
old_checker_pid = None
1128
r = Client.start_checker(self, *args, **kwargs)
1129
# Only if new checker process was started
1130
if (self.checker is not None
1131
and old_checker_pid != self.checker.pid):
1133
self.CheckerStarted(self.current_checker_command)
1136
def _reset_approved(self):
1137
self._approved = None
1140
def approve(self, value=True):
1141
self.send_changedstate()
1142
self._approved = value
1143
gobject.timeout_add(_timedelta_to_milliseconds
1144
(self.approval_duration),
1145
self._reset_approved)
1148
## D-Bus methods, signals & properties
1149
_interface = "se.recompile.Mandos.Client"
1153
# CheckerCompleted - signal
1154
@dbus.service.signal(_interface, signature="nxs")
1155
def CheckerCompleted(self, exitcode, waitstatus, command):
1159
# CheckerStarted - signal
1160
@dbus.service.signal(_interface, signature="s")
1161
def CheckerStarted(self, command):
1165
# PropertyChanged - signal
1166
@dbus.service.signal(_interface, signature="sv")
1167
def PropertyChanged(self, property, value):
1171
# GotSecret - signal
1172
@dbus.service.signal(_interface)
1173
def GotSecret(self):
1175
Is sent after a successful transfer of secret from the Mandos
1176
server to mandos-client
1181
@dbus.service.signal(_interface, signature="s")
1182
def Rejected(self, reason):
1186
# NeedApproval - signal
1187
@dbus.service.signal(_interface, signature="tb")
1188
def NeedApproval(self, timeout, default):
1190
return self.need_approval()
1192
# NeRwequest - signal
1193
@dbus.service.signal(_interface, signature="s")
1194
def NewRequest(self, ip):
1196
Is sent after a client request a password.
1203
@dbus.service.method(_interface, in_signature="b")
1204
def Approve(self, value):
1207
# CheckedOK - method
1208
@dbus.service.method(_interface)
1209
def CheckedOK(self):
1213
@dbus.service.method(_interface)
1218
# StartChecker - method
1219
@dbus.service.method(_interface)
1220
def StartChecker(self):
1222
self.start_checker()
1225
@dbus.service.method(_interface)
1230
# StopChecker - method
1231
@dbus.service.method(_interface)
1232
def StopChecker(self):
1237
# ApprovalPending - property
1238
@dbus_service_property(_interface, signature="b", access="read")
1239
def ApprovalPending_dbus_property(self):
1240
return dbus.Boolean(bool(self.approvals_pending))
1242
# ApprovedByDefault - property
1243
@dbus_service_property(_interface, signature="b",
1245
def ApprovedByDefault_dbus_property(self, value=None):
1246
if value is None: # get
1247
return dbus.Boolean(self.approved_by_default)
1248
self.approved_by_default = bool(value)
1250
# ApprovalDelay - property
1251
@dbus_service_property(_interface, signature="t",
1253
def ApprovalDelay_dbus_property(self, value=None):
1254
if value is None: # get
1255
return dbus.UInt64(self.approval_delay_milliseconds())
1256
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1258
# ApprovalDuration - property
1259
@dbus_service_property(_interface, signature="t",
1261
def ApprovalDuration_dbus_property(self, value=None):
1262
if value is None: # get
1263
return dbus.UInt64(_timedelta_to_milliseconds(
1264
self.approval_duration))
1265
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1268
@dbus_service_property(_interface, signature="s", access="read")
1269
def Name_dbus_property(self):
1270
return dbus.String(self.name)
1272
# Fingerprint - property
1273
@dbus_service_property(_interface, signature="s", access="read")
1274
def Fingerprint_dbus_property(self):
1275
return dbus.String(self.fingerprint)
1278
@dbus_service_property(_interface, signature="s",
1280
def Host_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.String(self.host)
1285
# Created - property
1286
@dbus_service_property(_interface, signature="s", access="read")
1287
def Created_dbus_property(self):
1288
return datetime_to_dbus(self.created)
1290
# LastEnabled - property
1291
@dbus_service_property(_interface, signature="s", access="read")
1292
def LastEnabled_dbus_property(self):
1293
return datetime_to_dbus(self.last_enabled)
1295
# Enabled - property
1296
@dbus_service_property(_interface, signature="b",
1298
def Enabled_dbus_property(self, value=None):
1299
if value is None: # get
1300
return dbus.Boolean(self.enabled)
1306
# LastCheckedOK - property
1307
@dbus_service_property(_interface, signature="s",
1309
def LastCheckedOK_dbus_property(self, value=None):
1310
if value is not None:
1313
return datetime_to_dbus(self.last_checked_ok)
1315
# Expires - property
1316
@dbus_service_property(_interface, signature="s", access="read")
1317
def Expires_dbus_property(self):
1318
return datetime_to_dbus(self.expires)
1320
# LastApprovalRequest - property
1321
@dbus_service_property(_interface, signature="s", access="read")
1322
def LastApprovalRequest_dbus_property(self):
1323
return datetime_to_dbus(self.last_approval_request)
1325
# Timeout - property
1326
@dbus_service_property(_interface, signature="t",
1328
def Timeout_dbus_property(self, value=None):
1329
if value is None: # get
1330
return dbus.UInt64(self.timeout_milliseconds())
1331
self.timeout = datetime.timedelta(0, 0, 0, value)
1332
if getattr(self, "disable_initiator_tag", None) is None:
1334
# Reschedule timeout
1335
gobject.source_remove(self.disable_initiator_tag)
1336
self.disable_initiator_tag = None
1338
time_to_die = _timedelta_to_milliseconds((self
1343
if time_to_die <= 0:
1344
# The timeout has passed
1347
self.expires = (datetime.datetime.utcnow()
1348
+ datetime.timedelta(milliseconds =
1350
self.disable_initiator_tag = (gobject.timeout_add
1351
(time_to_die, self.disable))
1353
# ExtendedTimeout - property
1354
@dbus_service_property(_interface, signature="t",
1356
def ExtendedTimeout_dbus_property(self, value=None):
1357
if value is None: # get
1358
return dbus.UInt64(self.extended_timeout_milliseconds())
1359
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1361
# Interval - property
1362
@dbus_service_property(_interface, signature="t",
1364
def Interval_dbus_property(self, value=None):
1365
if value is None: # get
1366
return dbus.UInt64(self.interval_milliseconds())
1367
self.interval = datetime.timedelta(0, 0, 0, value)
1368
if getattr(self, "checker_initiator_tag", None) is None:
1371
# Reschedule checker run
1372
gobject.source_remove(self.checker_initiator_tag)
1373
self.checker_initiator_tag = (gobject.timeout_add
1374
(value, self.start_checker))
1375
self.start_checker() # Start one now, too
1377
# Checker - property
1378
@dbus_service_property(_interface, signature="s",
1380
def Checker_dbus_property(self, value=None):
1381
if value is None: # get
1382
return dbus.String(self.checker_command)
1383
self.checker_command = value
1385
# CheckerRunning - property
1386
@dbus_service_property(_interface, signature="b",
1388
def CheckerRunning_dbus_property(self, value=None):
1389
if value is None: # get
1390
return dbus.Boolean(self.checker is not None)
1392
self.start_checker()
1396
# ObjectPath - property
1397
@dbus_service_property(_interface, signature="o", access="read")
1398
def ObjectPath_dbus_property(self):
1399
return self.dbus_object_path # is already a dbus.ObjectPath
1402
@dbus_service_property(_interface, signature="ay",
1403
access="write", byte_arrays=True)
1404
def Secret_dbus_property(self, value):
1405
self.secret = str(value)
1410
class ProxyClient(object):
1411
def __init__(self, child_pipe, fpr, address):
1412
self._pipe = child_pipe
1413
self._pipe.send(('init', fpr, address))
1414
if not self._pipe.recv():
1417
def __getattribute__(self, name):
1418
if(name == '_pipe'):
1419
return super(ProxyClient, self).__getattribute__(name)
1420
self._pipe.send(('getattr', name))
1421
data = self._pipe.recv()
1422
if data[0] == 'data':
1424
if data[0] == 'function':
1425
def func(*args, **kwargs):
1426
self._pipe.send(('funcall', name, args, kwargs))
1427
return self._pipe.recv()[1]
1430
def __setattr__(self, name, value):
1431
if(name == '_pipe'):
1432
return super(ProxyClient, self).__setattr__(name, value)
1433
self._pipe.send(('setattr', name, value))
1436
class ClientDBusTransitional(ClientDBus):
1437
__metaclass__ = AlternateDBusNamesMetaclass
1440
class ClientHandler(socketserver.BaseRequestHandler, object):
1441
"""A class to handle client connections.
1443
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)
365
return now < (self.last_checked_ok + self.timeout)
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:
382
return ctypes.string_at(cert.data, cert.size)
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\
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)
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
1444
418
Note: This will run in its own forked process."""
1446
420
def handle(self):
1447
with contextlib.closing(self.server.child_pipe) as child_pipe:
1448
logger.info("TCP connection from: %s",
1449
unicode(self.client_address))
1450
logger.debug("Pipe FD: %d",
1451
self.server.child_pipe.fileno())
1453
session = (gnutls.connection
1454
.ClientSession(self.request,
1456
.X509Credentials()))
1458
# Note: gnutls.connection.X509Credentials is really a
1459
# generic GnuTLS certificate credentials object so long as
1460
# no X.509 keys are added to it. Therefore, we can use it
1461
# here despite using OpenPGP certificates.
1463
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1464
# "+AES-256-CBC", "+SHA1",
1465
# "+COMP-NULL", "+CTYPE-OPENPGP",
1467
# Use a fallback default, since this MUST be set.
1468
priority = self.server.gnutls_priority
1469
if priority is None:
1471
(gnutls.library.functions
1472
.gnutls_priority_set_direct(session._c_object,
1475
# Start communication using the Mandos protocol
1476
# Get protocol number
1477
line = self.request.makefile().readline()
1478
logger.debug("Protocol version: %r", line)
1480
if int(line.strip().split()[0]) > 1:
1482
except (ValueError, IndexError, RuntimeError) as error:
1483
logger.error("Unknown protocol version: %s", error)
1486
# Start GnuTLS connection
1489
except gnutls.errors.GNUTLSError as error:
1490
logger.warning("Handshake failed: %s", error)
1491
# Do not run session.bye() here: the session is not
1492
# established. Just abandon the request.
1494
logger.debug("Handshake succeeded")
1496
approval_required = False
1499
fpr = self.fingerprint(self.peer_certificate
1502
gnutls.errors.GNUTLSError) as error:
1503
logger.warning("Bad certificate: %s", error)
1505
logger.debug("Fingerprint: %s", fpr)
1506
if self.server.use_dbus:
1508
client.NewRequest(str(self.client_address))
1511
client = ProxyClient(child_pipe, fpr,
1512
self.client_address)
1516
if client.approval_delay:
1517
delay = client.approval_delay
1518
client.approvals_pending += 1
1519
approval_required = True
1522
if not client.enabled:
1523
logger.info("Client %s is disabled",
1525
if self.server.use_dbus:
1527
client.Rejected("Disabled")
1530
if client._approved or not client.approval_delay:
1531
#We are approved or approval is disabled
1533
elif client._approved is None:
1534
logger.info("Client %s needs approval",
1536
if self.server.use_dbus:
1538
client.NeedApproval(
1539
client.approval_delay_milliseconds(),
1540
client.approved_by_default)
1542
logger.warning("Client %s was not approved",
1544
if self.server.use_dbus:
1546
client.Rejected("Denied")
1549
#wait until timeout or approved
1550
time = datetime.datetime.now()
1551
client.changedstate.acquire()
1552
(client.changedstate.wait
1553
(float(client._timedelta_to_milliseconds(delay)
1555
client.changedstate.release()
1556
time2 = datetime.datetime.now()
1557
if (time2 - time) >= delay:
1558
if not client.approved_by_default:
1559
logger.warning("Client %s timed out while"
1560
" waiting for approval",
1562
if self.server.use_dbus:
1564
client.Rejected("Approval timed out")
1569
delay -= time2 - time
1572
while sent_size < len(client.secret):
1574
sent = session.send(client.secret[sent_size:])
1575
except gnutls.errors.GNUTLSError as error:
1576
logger.warning("gnutls send failed")
1578
logger.debug("Sent: %d, remaining: %d",
1579
sent, len(client.secret)
1580
- (sent_size + sent))
1583
logger.info("Sending secret to %s", client.name)
1584
# bump the timeout using extended_timeout
1585
client.checked_ok(client.extended_timeout)
1586
if self.server.use_dbus:
1591
if approval_required:
1592
client.approvals_pending -= 1
1595
except gnutls.errors.GNUTLSError as error:
1596
logger.warning("GnuTLS bye failed")
1599
def peer_certificate(session):
1600
"Return the peer's OpenPGP certificate as a bytestring"
1601
# If not an OpenPGP certificate...
1602
if (gnutls.library.functions
1603
.gnutls_certificate_type_get(session._c_object)
1604
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1605
# ...do the normal thing
1606
return session.peer_certificate
1607
list_size = ctypes.c_uint(1)
1608
cert_list = (gnutls.library.functions
1609
.gnutls_certificate_get_peers
1610
(session._c_object, ctypes.byref(list_size)))
1611
if not bool(cert_list) and list_size.value != 0:
1612
raise gnutls.errors.GNUTLSError("error getting peer"
1614
if list_size.value == 0:
1617
return ctypes.string_at(cert.data, cert.size)
1620
def fingerprint(openpgp):
1621
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1622
# New GnuTLS "datum" with the OpenPGP public key
1623
datum = (gnutls.library.types
1624
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1627
ctypes.c_uint(len(openpgp))))
1628
# New empty GnuTLS certificate
1629
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1630
(gnutls.library.functions
1631
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1632
# Import the OpenPGP public key into the certificate
1633
(gnutls.library.functions
1634
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1635
gnutls.library.constants
1636
.GNUTLS_OPENPGP_FMT_RAW))
1637
# Verify the self signature in the key
1638
crtverify = ctypes.c_uint()
1639
(gnutls.library.functions
1640
.gnutls_openpgp_crt_verify_self(crt, 0,
1641
ctypes.byref(crtverify)))
1642
if crtverify.value != 0:
1643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1644
raise (gnutls.errors.CertificateSecurityError
1646
# New buffer for the fingerprint
1647
buf = ctypes.create_string_buffer(20)
1648
buf_len = ctypes.c_size_t()
1649
# Get the fingerprint from the certificate into the buffer
1650
(gnutls.library.functions
1651
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1652
ctypes.byref(buf_len)))
1653
# Deinit the certificate
1654
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1655
# Convert the buffer to a Python bytestring
1656
fpr = ctypes.string_at(buf, buf_len.value)
1657
# Convert the bytestring to hexadecimal notation
1658
hex_fpr = binascii.hexlify(fpr).upper()
1662
class MultiprocessingMixIn(object):
1663
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1664
def sub_process_main(self, request, address):
1666
self.finish_request(request, address)
1668
self.handle_error(request, address)
1669
self.close_request(request)
1671
def process_request(self, request, address):
1672
"""Start a new process to process the request."""
1673
proc = multiprocessing.Process(target = self.sub_process_main,
1680
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1681
""" adds a pipe to the MixIn """
1682
def process_request(self, request, client_address):
1683
"""Overrides and wraps the original process_request().
1685
This function creates a new pipe in self.pipe
1687
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1689
proc = MultiprocessingMixIn.process_request(self, request,
1691
self.child_pipe.close()
1692
self.add_pipe(parent_pipe, proc)
1694
def add_pipe(self, parent_pipe, proc):
1695
"""Dummy function; override as necessary"""
1696
raise NotImplementedError
1699
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1700
socketserver.TCPServer, object):
1701
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
421
logger.info(u"TCP connection from: %s",
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
429
if int(line.strip().split()[0]) > 1:
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
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.
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
443
priority = "NORMAL" # Fallback default, since this
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);
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.
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
463
logger.debug(u"Fingerprint: %s", fpr)
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
470
logger.warning(u"Client not found for fingerprint: %s",
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
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))
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1704
enabled: Boolean; whether this server is activated yet
1705
interface: None or a network interface name (string)
1706
use_ipv6: Boolean; to use IPv6 or not
495
settings: Server settings
496
clients: Set() of Client objects
1708
def __init__(self, server_address, RequestHandlerClass,
1709
interface=None, use_ipv6=True):
1710
self.interface = interface
1712
self.address_family = socket.AF_INET6
1713
socketserver.TCPServer.__init__(self, server_address,
1714
RequestHandlerClass)
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)
1715
507
def server_bind(self):
1716
508
"""This overrides the normal server_bind() function
1717
509
to bind to an interface if one was specified, and also NOT to
1718
510
bind to an address or port if they were not specified."""
1719
if self.interface is not None:
1720
if SO_BINDTODEVICE is None:
1721
logger.error("SO_BINDTODEVICE does not exist;"
1722
" cannot bind to interface %s",
1726
self.socket.setsockopt(socket.SOL_SOCKET,
1730
except socket.error as error:
1731
if error[0] == errno.EPERM:
1732
logger.error("No permission to"
1733
" bind to interface %s",
1735
elif error[0] == errno.ENOPROTOOPT:
1736
logger.error("SO_BINDTODEVICE not available;"
1737
" cannot bind to interface %s",
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
515
self.socket.setsockopt(socket.SOL_SOCKET,
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"])
1741
525
# Only bind(2) the socket if we really need to.
1742
526
if self.server_address[0] or self.server_address[1]:
1743
527
if not self.server_address[0]:
1744
if self.address_family == socket.AF_INET6:
1745
any_address = "::" # in6addr_any
1747
any_address = socket.INADDR_ANY
1748
self.server_address = (any_address,
529
self.server_address = (in6addr_any,
1749
530
self.server_address[1])
1750
elif not self.server_address[1]:
531
elif self.server_address[1] is None:
1751
532
self.server_address = (self.server_address[0],
1753
# if self.interface:
1754
# self.server_address = (self.server_address[0],
1759
return socketserver.TCPServer.server_bind(self)
1762
class MandosServer(IPv6_TCPServer):
1766
clients: set of Client objects
1767
gnutls_priority GnuTLS priority string
1768
use_dbus: Boolean; to emit D-Bus signals or not
1770
Assumes a gobject.MainLoop event loop.
1772
def __init__(self, server_address, RequestHandlerClass,
1773
interface=None, use_ipv6=True, clients=None,
1774
gnutls_priority=None, use_dbus=True):
1775
self.enabled = False
1776
self.clients = clients
1777
if self.clients is None:
1779
self.use_dbus = use_dbus
1780
self.gnutls_priority = gnutls_priority
1781
IPv6_TCPServer.__init__(self, server_address,
1782
RequestHandlerClass,
1783
interface = interface,
1784
use_ipv6 = use_ipv6)
1785
def server_activate(self):
1787
return socketserver.TCPServer.server_activate(self)
1792
def add_pipe(self, parent_pipe, proc):
1793
# Call "handle_ipc" for both data and EOF events
1794
gobject.io_add_watch(parent_pipe.fileno(),
1795
gobject.IO_IN | gobject.IO_HUP,
1796
functools.partial(self.handle_ipc,
1801
def handle_ipc(self, source, condition, parent_pipe=None,
1802
proc = None, client_object=None):
1804
gobject.IO_IN: "IN", # There is data to read.
1805
gobject.IO_OUT: "OUT", # Data can be written (without
1807
gobject.IO_PRI: "PRI", # There is urgent data to read.
1808
gobject.IO_ERR: "ERR", # Error condition.
1809
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1810
# broken, usually for pipes and
1813
conditions_string = ' | '.join(name
1815
condition_names.iteritems()
1816
if cond & condition)
1817
# error, or the other end of multiprocessing.Pipe has closed
1818
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1819
# Wait for other process to exit
1823
# Read a request from the child
1824
request = parent_pipe.recv()
1825
command = request[0]
1827
if command == 'init':
1829
address = request[2]
1831
for c in self.clients.itervalues():
1832
if c.fingerprint == fpr:
1836
logger.info("Client not found for fingerprint: %s, ad"
1837
"dress: %s", fpr, address)
1840
mandos_dbus_service.ClientNotFound(fpr,
1842
parent_pipe.send(False)
1845
gobject.io_add_watch(parent_pipe.fileno(),
1846
gobject.IO_IN | gobject.IO_HUP,
1847
functools.partial(self.handle_ipc,
1853
parent_pipe.send(True)
1854
# remove the old hook in favor of the new above hook on
1857
if command == 'funcall':
1858
funcname = request[1]
1862
parent_pipe.send(('data', getattr(client_object,
1866
if command == 'getattr':
1867
attrname = request[1]
1868
if callable(client_object.__getattribute__(attrname)):
1869
parent_pipe.send(('function',))
1871
parent_pipe.send(('data', client_object
1872
.__getattribute__(attrname)))
1874
if command == 'setattr':
1875
attrname = request[1]
1877
setattr(client_object, attrname, value)
534
return super(type(self), self).server_bind()
1882
537
def string_to_delta(interval):
1883
538
"""Parse a string and return a datetime.timedelta
1885
540
>>> string_to_delta('7d')
1886
541
datetime.timedelta(7)
1887
542
>>> string_to_delta('60s')
2000
679
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2001
680
"servicename": "Mandos",
2006
"statedir": "/var/lib/mandos"
2009
683
# Parse config file for server-global settings
2010
server_config = configparser.SafeConfigParser(server_defaults)
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
2011
685
del server_defaults
2012
server_config.read(os.path.join(options.configdir,
686
server_config.read(os.path.join(options.configdir, "server.conf"))
687
server_section = "server"
2014
688
# Convert the SafeConfigParser object to a dict
2015
server_settings = server_config.defaults()
2016
# Use the appropriate methods on the non-string config options
2017
for option in ("debug", "use_dbus", "use_ipv6"):
2018
server_settings[option] = server_config.getboolean("DEFAULT",
2020
if server_settings["port"]:
2021
server_settings["port"] = server_config.getint("DEFAULT",
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")
2023
693
del server_config
2025
695
# Override the settings from the config file with command line
2026
696
# options, if set.
2027
697
for option in ("interface", "address", "port", "debug",
2028
"priority", "servicename", "configdir",
2029
"use_dbus", "use_ipv6", "debuglevel", "restore",
698
"priority", "servicename", "configdir"):
2031
699
value = getattr(options, option)
2032
700
if value is not None:
2033
701
server_settings[option] = value
2035
# Force all strings to be unicode
2036
for option in server_settings.keys():
2037
if type(server_settings[option]) is str:
2038
server_settings[option] = unicode(server_settings[option])
2039
703
# Now we have our good server settings in "server_settings"
2041
##################################################################
2044
debug = server_settings["debug"]
2045
debuglevel = server_settings["debuglevel"]
2046
use_dbus = server_settings["use_dbus"]
2047
use_ipv6 = server_settings["use_ipv6"]
2048
stored_state_path = os.path.join(server_settings["statedir"],
2052
initlogger(logging.DEBUG)
2057
level = getattr(logging, debuglevel.upper())
2060
if server_settings["servicename"] != "Mandos":
2061
syslogger.setFormatter(logging.Formatter
2062
('Mandos (%s) [%%(process)d]:'
2063
' %%(levelname)s: %%(message)s'
2064
% server_settings["servicename"]))
2066
705
# Parse config file with clients
2067
client_defaults = { "timeout": "5m",
2068
"extended_timeout": "15m",
2070
"checker": "fping -q -- %%(host)s",
2072
"approval_delay": "0s",
2073
"approval_duration": "1s",
706
client_defaults = { "timeout": "1h",
708
"checker": "fping -q -- %%(fqdn)s",
2075
client_config = configparser.SafeConfigParser(client_defaults)
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
2076
711
client_config.read(os.path.join(server_settings["configdir"],
2077
712
"clients.conf"))
2079
global mandos_dbus_service
2080
mandos_dbus_service = None
2082
tcp_server = MandosServer((server_settings["address"],
2083
server_settings["port"]),
2085
interface=(server_settings["interface"]
2089
server_settings["priority"],
2092
pidfilename = "/var/run/mandos.pid"
2094
pidfile = open(pidfilename, "w")
2096
logger.error("Could not open file %r", pidfilename)
2099
uid = pwd.getpwnam("_mandos").pw_uid
2100
gid = pwd.getpwnam("_mandos").pw_gid
2103
uid = pwd.getpwnam("mandos").pw_uid
2104
gid = pwd.getpwnam("mandos").pw_gid
2107
uid = pwd.getpwnam("nobody").pw_uid
2108
gid = pwd.getpwnam("nobody").pw_gid
2115
except OSError as error:
2116
if error[0] != errno.EPERM:
2120
# Enable all possible GnuTLS debugging
2122
# "Use a log level over 10 to enable all debugging options."
2124
gnutls.library.functions.gnutls_global_set_log_level(11)
2126
@gnutls.library.types.gnutls_log_func
2127
def debug_gnutls(level, string):
2128
logger.debug("GnuTLS: %s", string[:-1])
2130
(gnutls.library.functions
2131
.gnutls_global_set_log_function(debug_gnutls))
2133
# Redirect stdin so all checkers get /dev/null
2134
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2135
os.dup2(null, sys.stdin.fileno())
2139
# No console logging
2140
logger.removeHandler(console)
2142
# Need to fork before connecting to D-Bus
2144
# Close all input and output, do double fork, etc.
715
service = AvahiService(name = server_settings["servicename"],
716
type = "_mandos._tcp", );
717
if server_settings["interface"]:
718
service.interface = if_nametoindex(server_settings["interface"])
2147
720
global main_loop
2148
723
# From the Avahi example code
2149
724
DBusGMainLoop(set_as_default=True )
2150
725
main_loop = gobject.MainLoop()
2151
726
bus = dbus.SystemBus()
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
2152
730
# End of Avahi example code
2155
bus_name = dbus.service.BusName("se.recompile.Mandos",
2156
bus, do_not_queue=True)
2157
old_bus_name = (dbus.service.BusName
2158
("se.bsnet.fukt.Mandos", bus,
2160
except dbus.exceptions.NameExistsException as e:
2161
logger.error(unicode(e) + ", disabling D-Bus")
2163
server_settings["use_dbus"] = False
2164
tcp_server.use_dbus = False
2165
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2166
service = AvahiServiceToSyslog(name =
2167
server_settings["servicename"],
2168
servicetype = "_mandos._tcp",
2169
protocol = protocol, bus = bus)
2170
if server_settings["interface"]:
2171
service.interface = (if_nametoindex
2172
(str(server_settings["interface"])))
2174
global multiprocessing_manager
2175
multiprocessing_manager = multiprocessing.Manager()
2177
client_class = Client
2179
client_class = functools.partial(ClientDBusTransitional,
2182
special_settings = {
2183
# Some settings need to be accessd by special methods;
2184
# booleans need .getboolean(), etc. Here is a list of them:
2185
"approved_by_default":
2187
client_config.getboolean(section, "approved_by_default"),
2190
client_config.getboolean(section, "enabled"),
2192
# Construct a new dict of client settings of this form:
2193
# { client_name: {setting_name: value, ...}, ...}
2194
# with exceptions for any special settings as defined above
2195
client_settings = dict((clientname,
2198
if setting not in special_settings
2199
else special_settings[setting]
2201
for setting, value in
2202
client_config.items(clientname)))
2203
for clientname in client_config.sections())
2205
old_client_settings = {}
2208
# Get client data and settings from last running state.
2209
if server_settings["restore"]:
2211
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
2214
os.remove(stored_state_path)
2215
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2218
if e.errno != errno.ENOENT:
2221
with PGPEngine() as pgp:
2222
for client in clients_data:
2223
client_name = client["name"]
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2238
setattr(client, name, value)
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was sucessful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"] and client["last_checked_ok"]:
2247
if ((datetime.datetime.utcnow()
2248
- client["last_checked_ok"])
2249
> client["interval"]):
2250
if client["last_checker_status"] != 0:
2251
client["enabled"] = False
2253
client["expires"] = (datetime.datetime
2255
+ client["timeout"])
2257
client["changedstate"] = (multiprocessing_manager
2259
(multiprocessing_manager
2262
new_client = (ClientDBusTransitional.__new__
2263
(ClientDBusTransitional))
2264
tcp_server.clients[client_name] = new_client
2265
new_client.bus = bus
2266
for name, value in client.iteritems():
2267
setattr(new_client, name, value)
2268
client_object_name = unicode(client_name).translate(
2269
{ord("."): ord("_"),
2270
ord("-"): ord("_")})
2271
new_client.dbus_object_path = (dbus.ObjectPath
2273
+ client_object_name))
2274
DBusObjectWithProperties.__init__(new_client,
2279
tcp_server.clients[client_name] = (Client.__new__
2281
for name, value in client.iteritems():
2282
setattr(tcp_server.clients[client_name],
2286
tcp_server.clients[client_name].secret = (
2287
pgp.decrypt(tcp_server.clients[client_name]
2289
client_settings[client_name]
2292
# If decryption fails, we use secret from new settings
2293
tcp_server.clients[client_name].secret = (
2294
client_settings[client_name]["secret"])
2296
# Create/remove clients based on new changes made to config
2297
for clientname in set(old_client_settings) - set(client_settings):
2298
del tcp_server.clients[clientname]
2299
for clientname in set(client_settings) - set(old_client_settings):
2300
tcp_server.clients[clientname] = (client_class(name
2306
if not tcp_server.clients:
2307
logger.warning("No clients defined")
2313
pidfile.write(str(pid) + "\n".encode("utf-8"))
2316
logger.error("Could not write to file %r with PID %d",
2319
# "pidfile" was never created
732
debug = server_settings["debug"]
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
743
def remove_from_clients(client):
744
clients.remove(client)
746
logger.critical(u"No clients left, exiting")
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
752
= dict(client_config.items(section)))
753
for section in client_config.sections()))
759
"Cleanup function; run on exit"
761
# From the Avahi example code
762
if not group is None:
765
# End of Avahi example code
768
client = clients.pop()
769
client.stop_hook = None
772
atexit.register(cleanup)
2323
775
signal.signal(signal.SIGINT, signal.SIG_IGN)
2325
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2326
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2329
class MandosDBusService(dbus.service.Object):
2330
"""A D-Bus proxy object"""
2332
dbus.service.Object.__init__(self, bus, "/")
2333
_interface = "se.recompile.Mandos"
2335
@dbus.service.signal(_interface, signature="o")
2336
def ClientAdded(self, objpath):
2340
@dbus.service.signal(_interface, signature="ss")
2341
def ClientNotFound(self, fingerprint, address):
2345
@dbus.service.signal(_interface, signature="os")
2346
def ClientRemoved(self, objpath, name):
2350
@dbus.service.method(_interface, out_signature="ao")
2351
def GetAllClients(self):
2353
return dbus.Array(c.dbus_object_path
2355
tcp_server.clients.itervalues())
2357
@dbus.service.method(_interface,
2358
out_signature="a{oa{sv}}")
2359
def GetAllClientsWithProperties(self):
2361
return dbus.Dictionary(
2362
((c.dbus_object_path, c.GetAll(""))
2363
for c in tcp_server.clients.itervalues()),
2366
@dbus.service.method(_interface, in_signature="o")
2367
def RemoveClient(self, object_path):
2369
for c in tcp_server.clients.itervalues():
2370
if c.dbus_object_path == object_path:
2371
del tcp_server.clients[c.name]
2372
c.remove_from_connection()
2373
# Don't signal anything except ClientRemoved
2374
c.disable(quiet=True)
2376
self.ClientRemoved(object_path, c.name)
2378
raise KeyError(object_path)
2382
class MandosDBusServiceTransitional(MandosDBusService):
2383
__metaclass__ = AlternateDBusNamesMetaclass
2384
mandos_dbus_service = MandosDBusServiceTransitional()
2387
"Cleanup function; run on exit"
2390
multiprocessing.active_children()
2391
if not (tcp_server.clients or client_settings):
2394
# Store client before exiting. Secrets are encrypted with key
2395
# based on what config file has. If config file is
2396
# removed/edited, old secret will thus be unrecovable.
2398
with PGPEngine() as pgp:
2399
for client in tcp_server.clients.itervalues():
2400
key = client_settings[client.name]["secret"]
2401
client.encrypted_secret = pgp.encrypt(client.secret,
2405
# A list of attributes that will not be stored when
2407
exclude = set(("bus", "changedstate", "secret"))
2408
for name, typ in (inspect.getmembers
2409
(dbus.service.Object)):
2412
client_dict["encrypted_secret"] = (client
2414
for attr in client.client_structure:
2415
if attr not in exclude:
2416
client_dict[attr] = getattr(client, attr)
2418
clients.append(client_dict)
2419
del client_settings[client.name]["secret"]
2422
with os.fdopen(os.open(stored_state_path,
2423
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2424
0600), "wb") as stored_state:
2425
pickle.dump((clients, client_settings), stored_state)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2429
if e.errno not in (errno.ENOENT, errno.EACCES):
2432
# Delete all clients, and settings from config
2433
while tcp_server.clients:
2434
name, client = tcp_server.clients.popitem()
2436
client.remove_from_connection()
2437
# Don't signal anything except ClientRemoved
2438
client.disable(quiet=True)
2441
mandos_dbus_service.ClientRemoved(client
2444
client_settings.clear()
2446
atexit.register(cleanup)
2448
for client in tcp_server.clients.itervalues():
2451
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2452
# Need to initiate checking of clients
2454
client.init_checker()
2457
tcp_server.server_activate()
779
for client in clients:
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
785
settings=server_settings,
2459
787
# Find out what port we got
2460
788
service.port = tcp_server.socket.getsockname()[1]
2462
logger.info("Now listening on address %r, port %d,"
2463
" flowinfo %d, scope_id %d"
2464
% tcp_server.socket.getsockname())
2466
logger.info("Now listening on address %r, port %d"
2467
% 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())
2469
792
#service.interface = tcp_server.socket.getsockname()[3]
2472
795
# From the Avahi example code
796
server.connect_to_signal("StateChanged", server_state_changed)
2475
except dbus.exceptions.DBusException as error:
2476
logger.critical("DBusException: %s", error)
798
server_state_changed(server.GetState())
799
except dbus.exceptions.DBusException, error:
800
logger.critical(u"DBusException: %s", error)
2479
802
# End of Avahi example code
2481
804
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2482
805
lambda *args, **kwargs:
2483
(tcp_server.handle_request
2484
(*args[2:], **kwargs) or True))
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
2486
809
logger.debug("Starting main loop")
810
main_loop_started = True
2488
except AvahiError as error:
2489
logger.critical("AvahiError: %s", error)
812
except AvahiError, error:
813
logger.critical(u"AvahiError: %s" + unicode(error))
2492
815
except KeyboardInterrupt:
2494
print("", file=sys.stderr)
2495
logger.debug("Server received KeyboardInterrupt")
2496
logger.debug("Server exiting")
2497
# Must run before the D-Bus bus name gets deregistered
2501
819
if __name__ == '__main__':