124
358
self.rename_count = 0
125
359
self.max_renames = max_renames
360
self.protocol = protocol
361
self.group = None # our entry group
364
self.entry_group_state_changed_match = None
366
def rename(self, remove=True):
127
367
"""Derived from the Avahi example code"""
128
368
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
369
logger.critical("No suitable Zeroconf service name found"
370
" after %i retries, exiting.",
131
371
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
372
raise AvahiServiceError("Too many renames")
374
self.server.GetAlternativeServiceName(self.name))
141
375
self.rename_count += 1
376
logger.info("Changing Zeroconf service name to %r ...",
382
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
388
logger.critical("D-Bus Exception", exc_info=error)
142
392
def remove(self):
143
393
"""Derived from the Avahi example code"""
144
if group is not None:
394
if self.entry_group_state_changed_match is not None:
395
self.entry_group_state_changed_match.remove()
396
self.entry_group_state_changed_match = None
397
if self.group is not None:
147
401
"""Derived from the Avahi example code"""
150
group = dbus.Interface(bus.get_object
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
178
class Client(dbus.service.Object):
403
if self.group is None:
404
self.group = dbus.Interface(
405
self.bus.get_object(avahi.DBUS_NAME,
406
self.server.EntryGroupNew()),
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
self.entry_group_state_changed_match = (
409
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
self.name, self.type)
413
self.group.AddService(
416
dbus.UInt32(0), # flags
417
self.name, self.type,
418
self.domain, self.host,
419
dbus.UInt16(self.port),
420
avahi.string_array_to_txt_array(self.TXT))
423
def entry_group_state_changed(self, state, error):
424
"""Derived from the Avahi example code"""
425
logger.debug("Avahi entry group state change: %i", state)
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
logger.debug("Zeroconf service established.")
429
elif state == avahi.ENTRY_GROUP_COLLISION:
430
logger.info("Zeroconf service name collision.")
432
elif state == avahi.ENTRY_GROUP_FAILURE:
433
logger.critical("Avahi: Error in group state changed %s",
435
raise AvahiGroupError("State changed: {!s}".format(error))
438
"""Derived from the Avahi example code"""
439
if self.group is not None:
442
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
448
def server_state_changed(self, state, error=None):
449
"""Derived from the Avahi example code"""
450
logger.debug("Avahi server state change: %i", state)
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
457
if state in bad_states:
458
if bad_states[state] is not None:
460
logger.error(bad_states[state])
462
logger.error(bad_states[state] + ": %r", error)
464
elif state == avahi.SERVER_RUNNING:
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
472
return self.rename(remove=False)
474
logger.critical("D-Bus Exception", exc_info=error)
479
logger.debug("Unknown state: %r", state)
481
logger.debug("Unknown state: %r: %r", state, error)
484
"""Derived from the Avahi example code"""
485
if self.server is None:
486
self.server = dbus.Interface(
487
self.bus.get_object(avahi.DBUS_NAME,
488
avahi.DBUS_PATH_SERVER,
489
follow_name_owner_changes=True),
490
avahi.DBUS_INTERFACE_SERVER)
491
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
493
self.server_state_changed(self.server.GetState())
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
828
class Client(object):
179
829
"""A representation of a client host served by this server.
181
name: string; from the config file, used in log messages and
183
fingerprint: string (40 or 32 hexadecimal digits); used to
184
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
190
last_checked_ok: datetime.datetime(); (UTC) or None
191
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
832
approved: bool(); 'None' if not yet approved/disapproved
833
approval_delay: datetime.timedelta(); Time to wait for approval
834
approval_duration: datetime.timedelta(); Duration of one approval
195
835
checker: subprocess.Popen(); a running checker process used
196
836
to see if the client lives.
197
837
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
838
checker_callback_tag: a GLib event source tag, or None
839
checker_command: string; External command which is run to check
840
if client lives. %() expansions are done at
203
841
runtime with vars(self) as dict, so that for
204
842
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
843
checker_initiator_tag: a GLib event source tag, or None
844
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
847
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
850
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
854
host: string; available for use by the checker command
855
interval: datetime.timedelta(); How often to start a new checker
856
last_approval_request: datetime.datetime(); (UTC) or None
857
last_checked_ok: datetime.datetime(); (UTC) or None
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
864
name: string; from the config file, used in log messages and
866
secret: bytestring; sent verbatim (over TLS) to client
867
timeout: datetime.timedelta(); How long from last_checked_ok
868
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
870
runtime_expansions: Allowed attributes for runtime expansion.
871
expires: datetime.datetime(); time (UTC) when a client will be
873
server_settings: The server_settings dict from main()
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
220
def __init__(self, name = None, disable_hook=None, config=None,
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
876
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
880
"last_enabled", "name", "timeout")
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
918
client["fingerprint"] = (section["fingerprint"].upper()
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
928
client["secret"] = secfile.read()
930
raise TypeError("No secret or secfile for section {}"
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
947
def __init__(self, settings, name=None, server_settings=None):
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
233
self.fingerprint = (config["fingerprint"].upper()
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
949
if server_settings is None:
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
244
raise TypeError(u"No secret or secfile for client %s"
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
963
self.last_enabled = None
966
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
968
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
972
# attributes specific for this server instance
254
973
self.checker = None
255
974
self.checker_initiator_tag = None
256
975
self.disable_initiator_tag = None
257
976
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
262
self.use_dbus = use_dbus
264
self.dbus_object_path = (dbus.ObjectPath
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
977
self.current_checker_command = None
979
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
992
# Send notice to process children that client state has changed
993
def send_changedstate(self):
994
with self.changedstate:
995
self.changedstate.notify_all()
270
997
def enable(self):
271
998
"""Start this client's checker and timeout hooks"""
999
if getattr(self, "enabled", False):
1002
self.expires = datetime.datetime.utcnow() + self.timeout
272
1004
self.last_enabled = datetime.datetime.utcnow()
1006
self.send_changedstate()
1008
def disable(self, quiet=True):
1009
"""Disable this client."""
1010
if not getattr(self, "enabled", False):
1013
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
1016
self.disable_initiator_tag = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
1020
self.checker_initiator_tag = None
1022
self.enabled = False
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
1031
def init_checker(self):
273
1032
# Schedule a new checker to be started an 'interval' from now,
274
1033
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
278
1044
# Also start a new checker *right now*.
279
1045
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
305
if self.disable_hook:
306
self.disable_hook(self)
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
316
self.disable_hook = None
319
def checker_callback(self, pid, condition, command):
1047
def checker_callback(self, source, condition, connection,
320
1049
"""The checker has completed, so take appropriate actions."""
321
1050
self.checker_callback_tag = None
322
1051
self.checker = None
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
330
logger.info(u"Checker for %(name)s succeeded",
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
1060
logger.info("Checker for %(name)s succeeded",
332
1062
self.checked_ok()
334
logger.info(u"Checker for %(name)s failed",
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
1064
logger.info("Checker for %(name)s failed", vars(self))
342
logger.warning(u"Checker for %(name)s crashed?",
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
logger.warning("Checker for %(name)s crashed?",
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
350
1072
def checked_ok(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
1073
"""Assert that the client has been seen, alive and well."""
355
1074
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
1082
timeout = self.timeout
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1091
def need_approval(self):
1092
self.last_approval_request = datetime.datetime.utcnow()
367
1094
def start_checker(self):
368
1095
"""Start a new checker subprocess if one is not running.
369
1097
If a checker already exists, leave it running and do
371
1099
# The reason for not killing a running checker is that if we
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
376
1104
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
1105
# than 'timeout' for the client to be disabled, which is as it
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1112
# Start a new checker if needed
379
1113
if self.checker is None:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
384
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
387
vars(self).iteritems())
389
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
393
return True # Try again later
395
logger.info(u"Starting checker %r for %s",
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
self.checker = subprocess.Popen(command,
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
412
self.checker_callback,
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
417
# Re-run this periodically if run by gobject.timeout_add
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
return True # Try again later
1125
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
420
1154
def stop_checker(self):
421
1155
"""Force the checker process, if any, to stop."""
422
1156
if self.checker_callback_tag:
423
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
424
1158
self.checker_callback_tag = None
425
1159
if getattr(self, "checker", None) is None:
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
429
os.kill(self.checker.pid, signal.SIGTERM)
431
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
434
if error.errno != errno.ESRCH: # No such process
1161
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
436
1163
self.checker = None
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
1166
def dbus_service_property(dbus_interface,
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
become properties on the D-Bus.
1173
The decorated method will be called with no arguments by "Get"
1174
and with one argument by "Set".
1176
The parameters, where they are supported, are the same as
1177
dbus.service.method, except there is only "signature", since the
1178
type from Get() and the type sent to Set() is the same.
1180
# Encoding deeply encoded byte arrays is not supported yet by the
1181
# "Set" method, so we fail early here:
1182
if byte_arrays and signature != "ay":
1183
raise ValueError("Byte arrays not supported for non-'ay'"
1184
" signature {!r}".format(signature))
1186
def decorator(func):
1187
func._dbus_is_property = True
1188
func._dbus_interface = dbus_interface
1189
func._dbus_signature = signature
1190
func._dbus_access = access
1191
func._dbus_name = func.__name__
1192
if func._dbus_name.endswith("_dbus_property"):
1193
func._dbus_name = func._dbus_name[:-14]
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1233
See also the DBusObjectWithAnnotations class.
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1243
class DBusPropertyException(dbus.exceptions.DBusException):
1244
"""A base class for D-Bus property-related exceptions
1249
class DBusPropertyAccessException(DBusPropertyException):
1250
"""A property's access permissions disallows an operation.
1255
class DBusPropertyNotFound(DBusPropertyException):
1256
"""An attempt was made to access a non-existing property.
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1294
Inserts annotation tags on methods and signals.
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1299
document = xml.dom.minidom.parseString(xmlstring)
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1339
arg.setAttribute("name",
1341
xmlstring = document.toxml("utf-8")
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1351
"""A D-Bus object with properties.
1353
Classes inheriting from this can use the dbus_service_property
1354
decorator to expose methods as D-Bus properties. It exposes the
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
1358
def _get_dbus_property(self, interface_name, property_name):
1359
"""Returns a bound method if one exists which is a D-Bus
1360
property with the specified name and interface.
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
1365
if (value._dbus_name == property_name
1366
and value._dbus_interface == interface_name):
1367
return value.__get__(self)
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1380
if name is not None)
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1385
def Get(self, interface_name, property_name):
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
1388
prop = self._get_dbus_property(interface_name, property_name)
1389
if prop._dbus_access == "write":
1390
raise DBusPropertyAccessException(property_name)
1392
if not hasattr(value, "variant_level"):
1394
return type(value)(value, variant_level=value.variant_level+1)
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1397
def Set(self, interface_name, property_name, value):
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
1400
prop = self._get_dbus_property(interface_name, property_name)
1401
if prop._dbus_access == "read":
1402
raise DBusPropertyAccessException(property_name)
1403
if prop._dbus_get_args_options["byte_arrays"]:
1404
# The byte_arrays option is not supported yet on
1405
# signatures other than "ay".
1406
if prop._dbus_signature != "ay":
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1416
out_signature="a{sv}")
1417
def GetAll(self, interface_name):
1418
"""Standard D-Bus property GetAll() method, see D-Bus
1421
Note: Will not include properties with access="write".
1424
for name, prop in self._get_all_dbus_things("property"):
1426
and interface_name != prop._dbus_interface):
1427
# Interface non-empty but did not match
1429
# Ignore write-only properties
1430
if prop._dbus_access == "write":
1433
if not hasattr(value, "variant_level"):
1434
properties[name] = value
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1450
path_keyword='object_path',
1451
connection_keyword='connection')
1452
def Introspect(self, object_path, connection):
1453
"""Overloading of standard D-Bus method.
1455
Inserts property tags and interface annotation tags.
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1461
document = xml.dom.minidom.parseString(xmlstring)
1463
def make_tag(document, name, prop):
1464
e = document.createElement("property")
1465
e.setAttribute("name", name)
1466
e.setAttribute("type", prop._dbus_signature)
1467
e.setAttribute("access", prop._dbus_access)
1470
for if_tag in document.getElementsByTagName("interface"):
1472
for tag in (make_tag(document, name, prop)
1474
in self._get_all_dbus_things("property")
1475
if prop._dbus_interface
1476
== if_tag.getAttribute("name")):
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1481
for name, prop in self._get_all_dbus_things(
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
1494
# Add the names to the return values for the
1495
# "org.freedesktop.DBus.Properties" methods
1496
if (if_tag.getAttribute("name")
1497
== "org.freedesktop.DBus.Properties"):
1498
for cn in if_tag.getElementsByTagName("method"):
1499
if cn.getAttribute("name") == "Get":
1500
for arg in cn.getElementsByTagName("arg"):
1501
if (arg.getAttribute("direction")
1503
arg.setAttribute("name", "value")
1504
elif cn.getAttribute("name") == "GetAll":
1505
for arg in cn.getElementsByTagName("arg"):
1506
if (arg.getAttribute("direction")
1508
arg.setAttribute("name", "props")
1509
xmlstring = document.toxml("utf-8")
1511
except (AttributeError, xml.dom.DOMException,
1512
xml.parsers.expat.ExpatError) as error:
1513
logger.error("Failed to override Introspection method",
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
# with the wrong interface name
1629
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1633
# Create an alternate D-Bus interface name based on
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
1638
# Is this a D-Bus signal?
1639
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1644
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
# Create a new, but exactly alike, function
1653
# object, and decorate it to be a new D-Bus signal
1654
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1666
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
1670
def fixscope(func1, func2):
1671
"""This function is a scope container to pass
1672
func1 and func2 to the "call_both" function
1673
outside of its arguments"""
1675
@functools.wraps(func2)
1676
def call_both(*args, **kwargs):
1677
"""This function will emit two D-Bus
1678
signals by calling func1 and func2"""
1679
func1(*args, **kwargs)
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1688
# Create the "call_both" function and add it to
1690
attr[attrname] = fixscope(attribute, new_function)
1691
# Is this a D-Bus method?
1692
elif getattr(attribute, "_dbus_is_method", False):
1693
# Create a new, but exactly alike, function
1694
# object. Decorate it to be a new D-Bus method
1695
# with the alternate D-Bus interface name. Add it
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1709
# Is this a D-Bus property?
1710
elif getattr(attribute, "_dbus_is_property", False):
1711
# Create a new, but exactly alike, function
1712
# object, and decorate it to be a new D-Bus
1713
# property with the alternate D-Bus interface
1714
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
1767
class ClientDBus(Client, DBusObjectWithProperties):
1768
"""A Client class using D-Bus
1771
dbus_object_path: dbus.ObjectPath
1772
bus: dbus.SystemBus()
1775
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
1780
# dbus.service.Object doesn't use super(), so we can't either.
1782
def __init__(self, bus=None, *args, **kwargs):
1784
Client.__init__(self, *args, **kwargs)
1785
# Only now, when this client is initialized, can it show up on
1787
client_object_name = str(self.name).translate(
1788
{ord("."): ord("_"),
1789
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1792
DBusObjectWithProperties.__init__(self, self.bus,
1793
self.dbus_object_path)
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
1800
""" Modify a variable so that it's a property which announces
1801
its changes to DBus.
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
1805
dbus_name: D-Bus name of the variable
1806
type_func: Function that transform the value before sending it
1807
to the D-Bus. Default: no transform
1808
variant_level: D-Bus variant level. Default: 1
1810
attrname = "_{}".format(dbus_name)
1812
def setter(self, value):
1813
if hasattr(self, "dbus_object_path"):
1814
if (not hasattr(self, attrname) or
1815
type_func(getattr(self, attrname, None))
1816
!= type_func(value)):
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1822
dbus_value = transform_func(
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1827
self.PropertiesChanged(
1829
dbus.Dictionary({dbus.String(dbus_name):
1832
setattr(self, attrname, value)
1834
return property(lambda self: getattr(self, attrname), setter)
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
last_approval_request = notifychangeproperty(
1851
datetime_to_dbus, "LastApprovalRequest")
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1853
"ApprovedByDefault")
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1857
approval_duration = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
1860
host = notifychangeproperty(dbus.String, "Host")
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
extended_timeout = notifychangeproperty(
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1874
del notifychangeproperty
1876
def __del__(self, *args, **kwargs):
1878
self.remove_from_connection()
1881
if hasattr(DBusObjectWithProperties, "__del__"):
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1883
Client.__del__(self, *args, **kwargs)
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1890
exitstatus = self.last_checker_status
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
1896
dbus.String(command))
449
return now < (self.last_checked_ok + self.timeout)
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
1899
self.CheckerCompleted(dbus.Int16(-1),
1901
# This is specific to GNU libC
1903
| self.last_checker_signal),
1904
dbus.String(command))
1907
def start_checker(self, *args, **kwargs):
1908
old_checker_pid = getattr(self.checker, "pid", None)
1909
r = Client.start_checker(self, *args, **kwargs)
1910
# Only if new checker process was started
1911
if (self.checker is not None
1912
and old_checker_pid != self.checker.pid):
1914
self.CheckerStarted(self.current_checker_command)
1917
def _reset_approved(self):
1918
self.approved = None
1921
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
self.send_changedstate()
1927
# D-Bus methods, signals & properties
458
1933
# CheckerCompleted - signal
459
1934
@dbus.service.signal(_interface, signature="nxs")
460
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
464
1939
# CheckerStarted - signal
465
1940
@dbus.service.signal(_interface, signature="s")
466
1941
def CheckerStarted(self, command):
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
474
return dbus.Dictionary({
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
IsStillValid.__name__ = "IsStillValid"
517
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
518
1947
@dbus.service.signal(_interface, signature="sv")
519
1948
def PropertyChanged(self, property, value):
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
552
@dbus.service.method(_interface, in_signature="ay",
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
1952
# GotSecret - signal
1953
@dbus.service.signal(_interface)
1954
def GotSecret(self):
1956
Is sent after a successful transfer of secret from the Mandos
1957
server to mandos-client
1962
@dbus.service.signal(_interface, signature="s")
1963
def Rejected(self, reason):
1967
# NeedApproval - signal
1968
@dbus.service.signal(_interface, signature="tb")
1969
def NeedApproval(self, timeout, default):
1971
return self.need_approval()
1976
@dbus.service.method(_interface, in_signature="b")
1977
def Approve(self, value):
1980
# CheckedOK - method
1981
@dbus.service.method(_interface)
1982
def CheckedOK(self):
567
1985
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
@dbus.service.method(_interface)
571
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
572
1994
@dbus.service.method(_interface)
573
1995
def StartChecker(self):
575
1997
self.start_checker()
577
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
578
2001
@dbus.service.method(_interface)
579
2002
def Disable(self):
583
2006
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
@dbus.service.method(_interface)
2009
def StopChecker(self):
2014
# ApprovalPending - property
2015
@dbus_service_property(_interface, signature="b", access="read")
2016
def ApprovalPending_dbus_property(self):
2017
return dbus.Boolean(bool(self.approvals_pending))
2019
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
2023
def ApprovedByDefault_dbus_property(self, value=None):
2024
if value is None: # get
2025
return dbus.Boolean(self.approved_by_default)
2026
self.approved_by_default = bool(value)
2028
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
2032
def ApprovalDelay_dbus_property(self, value=None):
2033
if value is None: # get
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2038
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
2042
def ApprovalDuration_dbus_property(self, value=None):
2043
if value is None: # get
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
@dbus_service_property(_interface, signature="s", access="read")
2052
def Name_dbus_property(self):
2053
return dbus.String(self.name)
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2062
# Fingerprint - property
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
@dbus_service_property(_interface, signature="s", access="read")
2066
def Fingerprint_dbus_property(self):
2067
return dbus.String(self.fingerprint)
2070
@dbus_service_property(_interface,
2073
def Host_dbus_property(self, value=None):
2074
if value is None: # get
2075
return dbus.String(self.host)
2076
self.host = str(value)
2078
# Created - property
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
@dbus_service_property(_interface, signature="s", access="read")
2082
def Created_dbus_property(self):
2083
return datetime_to_dbus(self.created)
2085
# LastEnabled - property
2086
@dbus_service_property(_interface, signature="s", access="read")
2087
def LastEnabled_dbus_property(self):
2088
return datetime_to_dbus(self.last_enabled)
2090
# Enabled - property
2091
@dbus_service_property(_interface,
2094
def Enabled_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.Boolean(self.enabled)
2102
# LastCheckedOK - property
2103
@dbus_service_property(_interface,
2106
def LastCheckedOK_dbus_property(self, value=None):
2107
if value is not None:
2110
return datetime_to_dbus(self.last_checked_ok)
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2117
# Expires - property
2118
@dbus_service_property(_interface, signature="s", access="read")
2119
def Expires_dbus_property(self):
2120
return datetime_to_dbus(self.expires)
2122
# LastApprovalRequest - property
2123
@dbus_service_property(_interface, signature="s", access="read")
2124
def LastApprovalRequest_dbus_property(self):
2125
return datetime_to_dbus(self.last_approval_request)
2127
# Timeout - property
2128
@dbus_service_property(_interface,
2131
def Timeout_dbus_property(self, value=None):
2132
if value is None: # get
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
2136
# Reschedule disabling
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2144
if (getattr(self, "disable_initiator_tag", None)
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2152
# ExtendedTimeout - property
2153
@dbus_service_property(_interface,
2156
def ExtendedTimeout_dbus_property(self, value=None):
2157
if value is None: # get
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2162
# Interval - property
2163
@dbus_service_property(_interface,
2166
def Interval_dbus_property(self, value=None):
2167
if value is None: # get
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
2169
self.interval = datetime.timedelta(0, 0, 0, value)
2170
if getattr(self, "checker_initiator_tag", None) is None:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
2179
# Checker - property
2180
@dbus_service_property(_interface,
2183
def Checker_dbus_property(self, value=None):
2184
if value is None: # get
2185
return dbus.String(self.checker_command)
2186
self.checker_command = str(value)
2188
# CheckerRunning - property
2189
@dbus_service_property(_interface,
2192
def CheckerRunning_dbus_property(self, value=None):
2193
if value is None: # get
2194
return dbus.Boolean(self.checker is not None)
2196
self.start_checker()
2200
# ObjectPath - property
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
@dbus_service_property(_interface, signature="o", access="read")
2205
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2212
@dbus_service_property(_interface,
2216
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
605
if list_size.value == 0:
608
return ctypes.string_at(cert.data, cert.size)
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
2222
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
2224
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
2226
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
2229
def __getattribute__(self, name):
2231
return super(ProxyClient, self).__getattribute__(name)
2232
self._pipe.send(('getattr', name))
2233
data = self._pipe.recv()
2234
if data[0] == 'data':
2236
if data[0] == 'function':
2238
def func(*args, **kwargs):
2239
self._pipe.send(('funcall', name, args, kwargs))
2240
return self._pipe.recv()[1]
2244
def __setattr__(self, name, value):
2246
return super(ProxyClient, self).__setattr__(name, value)
2247
self._pipe.send(('setattr', name, value))
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
"""A class to handle client connections.
2253
Instantiated once for each connection to handle it.
654
2254
Note: This will run in its own forked process."""
656
2256
def handle(self):
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
667
if int(line.strip().split()[0]) > 1:
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
694
logger.debug(u"Handshake succeeded")
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
701
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
703
if c.fingerprint == fpr:
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
logger.info("TCP connection from: %s",
2259
str(self.client_address))
2260
logger.debug("Pipe FD: %d",
2261
self.server.child_pipe.fileno())
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2269
# Use a fallback default, since this MUST be set.
2270
priority = self.server.gnutls_priority
2271
if priority is None:
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2277
# Start communication using the Mandos protocol
2278
# Get protocol number
2279
line = self.request.makefile().readline()
2280
logger.debug("Protocol version: %r", line)
2282
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
2284
except (ValueError, IndexError, RuntimeError) as error:
2285
logger.error("Unknown protocol version: %s", error)
2288
# Start GnuTLS connection
2291
except gnutls.Error as error:
2292
logger.warning("Handshake failed: %s", error)
2293
# Do not run session.bye() here: the session is not
2294
# established. Just abandon the request.
2296
logger.debug("Handshake succeeded")
2298
approval_required = False
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
2322
self.client_address)
2326
if client.approval_delay:
2327
delay = client.approval_delay
2328
client.approvals_pending += 1
2329
approval_required = True
2332
if not client.enabled:
2333
logger.info("Client %s is disabled",
2335
if self.server.use_dbus:
2337
client.Rejected("Disabled")
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
2343
elif client.approved is None:
2344
logger.info("Client %s needs approval",
2346
if self.server.use_dbus:
2348
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
2352
logger.warning("Client %s was not approved",
2354
if self.server.use_dbus:
2356
client.Rejected("Denied")
2359
# wait until timeout or approved
2360
time = datetime.datetime.now()
2361
client.changedstate.acquire()
2362
client.changedstate.wait(delay.total_seconds())
2363
client.changedstate.release()
2364
time2 = datetime.datetime.now()
2365
if (time2 - time) >= delay:
2366
if not client.approved_by_default:
2367
logger.warning("Client %s timed out while"
2368
" waiting for approval",
2370
if self.server.use_dbus:
2372
client.Rejected("Approval timed out")
2377
delay -= time2 - time
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2386
logger.info("Sending secret to %s", client.name)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
2389
if self.server.use_dbus:
2394
if approval_required:
2395
client.approvals_pending -= 1
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2403
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
707
logger.warning(u"Client not found for fingerprint: %s",
711
# Have to check if client.still_valid(), since it is possible
712
# that the client timed out while establishing the GnuTLS
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
719
## This won't work here, since we're in a fork.
720
# client.checked_ok()
722
while sent_size < len(client.secret):
723
sent = session.send(client.secret[sent_size:])
724
logger.debug(u"Sent: %d, remaining: %d",
725
sent, len(client.secret)
726
- (sent_size + sent))
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
733
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
2420
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
2422
(session._c_object, ctypes.byref(list_size)))
2423
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
2425
if list_size.value == 0:
2428
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2465
def fingerprint(openpgp):
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
2472
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
2475
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
2478
# Verify the self signature in the key
2479
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
2482
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2486
# New buffer for the fingerprint
2487
buf = ctypes.create_string_buffer(20)
2488
buf_len = ctypes.c_size_t()
2489
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
2492
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
2494
# Convert the buffer to a Python bytestring
2495
fpr = ctypes.string_at(buf, buf_len.value)
2496
# Convert the bytestring to hexadecimal notation
2497
hex_fpr = binascii.hexlify(fpr).upper()
2501
class MultiprocessingMixIn(object):
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2504
def sub_process_main(self, request, address):
2506
self.finish_request(request, address)
2508
self.handle_error(request, address)
2509
self.close_request(request)
2511
def process_request(self, request, address):
2512
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
""" adds a pipe to the MixIn """
2522
def process_request(self, request, client_address):
2523
"""Overrides and wraps the original process_request().
2525
This function creates a new pipe in self.pipe
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2529
proc = MultiprocessingMixIn.process_request(self, request,
2531
self.child_pipe.close()
2532
self.add_pipe(parent_pipe, proc)
2534
def add_pipe(self, parent_pipe, proc):
2535
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
socketserver.TCPServer, object):
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
735
settings: Server settings
736
clients: Set() of Client objects
737
2544
enabled: Boolean; whether this server is activated yet
2545
interface: None or a network interface name (string)
2546
use_ipv6: Boolean; to use IPv6 or not
739
address_family = socket.AF_INET6
740
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
744
if "clients" in kwargs:
745
self.clients = kwargs["clients"]
746
del kwargs["clients"]
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2549
def __init__(self, server_address, RequestHandlerClass,
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2556
self.interface = interface
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
2586
socketserver.TCPServer.__init__(self, server_address,
2587
RequestHandlerClass)
749
2589
def server_bind(self):
750
2590
"""This overrides the normal server_bind() function
751
2591
to bind to an interface if one was specified, and also NOT to
752
2592
bind to an address or port if they were not specified."""
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2593
global SO_BINDTODEVICE
2594
if self.interface is not None:
2595
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
757
self.socket.setsockopt(socket.SOL_SOCKET,
759
self.settings["interface"])
760
except socket.error, error:
761
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
767
2617
# Only bind(2) the socket if we really need to.
768
2618
if self.server_address[0] or self.server_address[1]:
769
2619
if not self.server_address[0]:
771
self.server_address = (in6addr_any,
2620
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
2623
any_address = "0.0.0.0" # INADDR_ANY
2624
self.server_address = (any_address,
772
2625
self.server_address[1])
773
2626
elif not self.server_address[1]:
774
self.server_address = (self.server_address[0],
776
# if self.settings["interface"]:
2627
self.server_address = (self.server_address[0], 0)
2628
# if self.interface:
777
2629
# self.server_address = (self.server_address[0],
780
2632
# if_nametoindex
783
return super(IPv6_TCPServer, self).server_bind()
2634
return socketserver.TCPServer.server_bind(self)
2637
class MandosServer(IPv6_TCPServer):
2641
clients: set of Client objects
2642
gnutls_priority GnuTLS priority string
2643
use_dbus: Boolean; to emit D-Bus signals or not
2645
Assumes a GLib.MainLoop event loop.
2648
def __init__(self, server_address, RequestHandlerClass,
2652
gnutls_priority=None,
2655
self.enabled = False
2656
self.clients = clients
2657
if self.clients is None:
2659
self.use_dbus = use_dbus
2660
self.gnutls_priority = gnutls_priority
2661
IPv6_TCPServer.__init__(self, server_address,
2662
RequestHandlerClass,
2663
interface=interface,
784
2667
def server_activate(self):
785
2668
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
2669
return socketserver.TCPServer.server_activate(self)
787
2671
def enable(self):
788
2672
self.enabled = True
2674
def add_pipe(self, parent_pipe, proc):
2675
# Call "handle_ipc" for both data and EOF events
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2683
def handle_ipc(self, source, condition,
2686
client_object=None):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2693
# Read a request from the child
2694
request = parent_pipe.recv()
2695
command = request[0]
2697
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2702
for c in self.clients.values():
2703
if key_id and c.key_id == key_id:
2706
if fpr and c.fingerprint == fpr:
2710
logger.info("Client not found for key ID: %s, address"
2711
": %s", key_id or fpr, address)
2714
mandos_dbus_service.ClientNotFound(key_id or fpr,
2716
parent_pipe.send(False)
2720
parent_pipe.fileno(),
2721
GLib.IO_IN | GLib.IO_HUP,
2722
functools.partial(self.handle_ipc,
2723
parent_pipe=parent_pipe,
2725
client_object=client))
2726
parent_pipe.send(True)
2727
# remove the old hook in favor of the new above hook on
2730
if command == 'funcall':
2731
funcname = request[1]
2735
parent_pipe.send(('data', getattr(client_object,
2739
if command == 'getattr':
2740
attrname = request[1]
2741
if isinstance(client_object.__getattribute__(attrname),
2742
collections.Callable):
2743
parent_pipe.send(('function', ))
2746
'data', client_object.__getattribute__(attrname)))
2748
if command == 'setattr':
2749
attrname = request[1]
2751
setattr(client_object, attrname, value)
2756
def rfc3339_duration_to_delta(duration):
2757
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2759
>>> rfc3339_duration_to_delta("P7D")
2760
datetime.timedelta(7)
2761
>>> rfc3339_duration_to_delta("PT60S")
2762
datetime.timedelta(0, 60)
2763
>>> rfc3339_duration_to_delta("PT60M")
2764
datetime.timedelta(0, 3600)
2765
>>> rfc3339_duration_to_delta("PT24H")
2766
datetime.timedelta(1)
2767
>>> rfc3339_duration_to_delta("P1W")
2768
datetime.timedelta(7)
2769
>>> rfc3339_duration_to_delta("PT5M30S")
2770
datetime.timedelta(0, 330)
2771
>>> rfc3339_duration_to_delta("P1DT3M20S")
2772
datetime.timedelta(1, 200)
2775
# Parsing an RFC 3339 duration with regular expressions is not
2776
# possible - there would have to be multiple places for the same
2777
# values, like seconds. The current code, while more esoteric, is
2778
# cleaner without depending on a parsing library. If Python had a
2779
# built-in library for parsing we would use it, but we'd like to
2780
# avoid excessive use of external libraries.
2782
# New type for defining tokens, syntax, and semantics all-in-one
2783
Token = collections.namedtuple("Token", (
2784
"regexp", # To match token; if "value" is not None, must have
2785
# a "group" containing digits
2786
"value", # datetime.timedelta or None
2787
"followers")) # Tokens valid after this token
2788
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2789
# the "duration" ABNF definition in RFC 3339, Appendix A.
2790
token_end = Token(re.compile(r"$"), None, frozenset())
2791
token_second = Token(re.compile(r"(\d+)S"),
2792
datetime.timedelta(seconds=1),
2793
frozenset((token_end, )))
2794
token_minute = Token(re.compile(r"(\d+)M"),
2795
datetime.timedelta(minutes=1),
2796
frozenset((token_second, token_end)))
2797
token_hour = Token(re.compile(r"(\d+)H"),
2798
datetime.timedelta(hours=1),
2799
frozenset((token_minute, token_end)))
2800
token_time = Token(re.compile(r"T"),
2802
frozenset((token_hour, token_minute,
2804
token_day = Token(re.compile(r"(\d+)D"),
2805
datetime.timedelta(days=1),
2806
frozenset((token_time, token_end)))
2807
token_month = Token(re.compile(r"(\d+)M"),
2808
datetime.timedelta(weeks=4),
2809
frozenset((token_day, token_end)))
2810
token_year = Token(re.compile(r"(\d+)Y"),
2811
datetime.timedelta(weeks=52),
2812
frozenset((token_month, token_end)))
2813
token_week = Token(re.compile(r"(\d+)W"),
2814
datetime.timedelta(weeks=1),
2815
frozenset((token_end, )))
2816
token_duration = Token(re.compile(r"P"), None,
2817
frozenset((token_year, token_month,
2818
token_day, token_time,
2820
# Define starting values:
2822
value = datetime.timedelta()
2824
# Following valid tokens
2825
followers = frozenset((token_duration, ))
2826
# String left to parse
2828
# Loop until end token is found
2829
while found_token is not token_end:
2830
# Search for any currently valid tokens
2831
for token in followers:
2832
match = token.regexp.match(s)
2833
if match is not None:
2835
if token.value is not None:
2836
# Value found, parse digits
2837
factor = int(match.group(1), 10)
2838
# Add to value so far
2839
value += factor * token.value
2840
# Strip token from string
2841
s = token.regexp.sub("", s, 1)
2844
# Set valid next tokens
2845
followers = found_token.followers
2848
# No currently valid tokens were found
2849
raise ValueError("Invalid RFC 3339 duration: {!r}"
791
2855
def string_to_delta(interval):
792
2856
"""Parse a string and return a datetime.timedelta
900
parser = optparse.OptionParser(version = "%%prog %s" % version)
901
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
906
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
908
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
920
parser.add_option("--no-dbus", action="store_false",
922
help="Do not provide D-Bus system bus"
924
options = parser.parse_args()[0]
2927
##################################################################
2928
# Parsing of options, both command line and config file
2930
parser = argparse.ArgumentParser()
2931
parser.add_argument("-v", "--version", action="version",
2932
version="%(prog)s {}".format(version),
2933
help="show version number and exit")
2934
parser.add_argument("-i", "--interface", metavar="IF",
2935
help="Bind to interface IF")
2936
parser.add_argument("-a", "--address",
2937
help="Address to listen for requests on")
2938
parser.add_argument("-p", "--port", type=int,
2939
help="Port number to receive requests on")
2940
parser.add_argument("--check", action="store_true",
2941
help="Run self-test")
2942
parser.add_argument("--debug", action="store_true",
2943
help="Debug mode; run in foreground and log"
2944
" to terminal", default=None)
2945
parser.add_argument("--debuglevel", metavar="LEVEL",
2946
help="Debug level for stdout output")
2947
parser.add_argument("--priority", help="GnuTLS"
2948
" priority string (see GnuTLS documentation)")
2949
parser.add_argument("--servicename",
2950
metavar="NAME", help="Zeroconf service name")
2951
parser.add_argument("--configdir",
2952
default="/etc/mandos", metavar="DIR",
2953
help="Directory to search for configuration"
2955
parser.add_argument("--no-dbus", action="store_false",
2956
dest="use_dbus", help="Do not provide D-Bus"
2957
" system bus interface", default=None)
2958
parser.add_argument("--no-ipv6", action="store_false",
2959
dest="use_ipv6", help="Do not use IPv6",
2961
parser.add_argument("--no-restore", action="store_false",
2962
dest="restore", help="Do not restore stored"
2963
" state", default=None)
2964
parser.add_argument("--socket", type=int,
2965
help="Specify a file descriptor to a network"
2966
" socket to use instead of creating one")
2967
parser.add_argument("--statedir", metavar="DIR",
2968
help="Directory to save/restore state in")
2969
parser.add_argument("--foreground", action="store_true",
2970
help="Run in foreground", default=None)
2971
parser.add_argument("--no-zeroconf", action="store_false",
2972
dest="zeroconf", help="Do not use Zeroconf",
2975
options = parser.parse_args()
926
2977
if options.check:
2979
fail_count, test_count = doctest.testmod()
2980
sys.exit(os.EX_OK if fail_count == 0 else 1)
931
2982
# Default values for config file for server-global settings
932
server_defaults = { "interface": "",
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
2983
if gnutls.has_rawpk:
2984
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2985
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2988
":+SIGN-DSA-SHA256")
2989
server_defaults = {"interface": "",
2993
"priority": priority,
2994
"servicename": "Mandos",
3000
"statedir": "/var/lib/mandos",
3001
"foreground": "False",
942
3006
# Parse config file for server-global settings
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
3007
server_config = configparser.SafeConfigParser(server_defaults)
944
3008
del server_defaults
945
3009
server_config.read(os.path.join(options.configdir, "mandos.conf"))
946
3010
# Convert the SafeConfigParser object to a dict
947
3011
server_settings = server_config.defaults()
948
3012
# Use the appropriate methods on the non-string config options
949
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
3013
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3014
"foreground", "zeroconf"):
3015
server_settings[option] = server_config.getboolean("DEFAULT",
953
3017
if server_settings["port"]:
954
3018
server_settings["port"] = server_config.getint("DEFAULT",
3020
if server_settings["socket"]:
3021
server_settings["socket"] = server_config.getint("DEFAULT",
3023
# Later, stdin will, and stdout and stderr might, be dup'ed
3024
# over with an opened os.devnull. But we don't want this to
3025
# happen with a supplied network socket.
3026
if 0 <= server_settings["socket"] <= 2:
3027
server_settings["socket"] = os.dup(server_settings
956
3029
del server_config
958
3031
# Override the settings from the config file with command line
959
3032
# options, if set.
960
3033
for option in ("interface", "address", "port", "debug",
961
"priority", "servicename", "configdir",
3034
"priority", "servicename", "configdir", "use_dbus",
3035
"use_ipv6", "debuglevel", "restore", "statedir",
3036
"socket", "foreground", "zeroconf"):
963
3037
value = getattr(options, option)
964
3038
if value is not None:
965
3039
server_settings[option] = value
3041
# Force all strings to be unicode
3042
for option in server_settings.keys():
3043
if isinstance(server_settings[option], bytes):
3044
server_settings[option] = (server_settings[option]
3046
# Force all boolean options to be boolean
3047
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3048
"foreground", "zeroconf"):
3049
server_settings[option] = bool(server_settings[option])
3050
# Debug implies foreground
3051
if server_settings["debug"]:
3052
server_settings["foreground"] = True
967
3053
# Now we have our good server settings in "server_settings"
3055
##################################################################
3057
if (not server_settings["zeroconf"]
3058
and not (server_settings["port"]
3059
or server_settings["socket"] != "")):
3060
parser.error("Needs port or socket to work without Zeroconf")
969
3062
# For convenience
970
3063
debug = server_settings["debug"]
3064
debuglevel = server_settings["debuglevel"]
971
3065
use_dbus = server_settings["use_dbus"]
974
syslogger.setLevel(logging.WARNING)
975
console.setLevel(logging.WARNING)
3066
use_ipv6 = server_settings["use_ipv6"]
3067
stored_state_path = os.path.join(server_settings["statedir"],
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
3073
initlogger(debug, logging.DEBUG)
3078
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
977
3081
if server_settings["servicename"] != "Mandos":
978
syslogger.setFormatter(logging.Formatter
979
('Mandos (%s): %%(levelname)s:'
981
% server_settings["servicename"]))
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
983
3087
# Parse config file with clients
984
client_defaults = { "timeout": "1h",
986
"checker": "fping -q -- %%(host)s",
989
client_config = ConfigParser.SafeConfigParser(client_defaults)
3088
client_config = configparser.SafeConfigParser(Client
990
3090
client_config.read(os.path.join(server_settings["configdir"],
991
3091
"clients.conf"))
994
tcp_server = IPv6_TCPServer((server_settings["address"],
995
server_settings["port"]),
997
settings=server_settings,
999
pidfilename = "/var/run/mandos.pid"
1001
pidfile = open(pidfilename, "w")
1002
except IOError, error:
1003
logger.error("Could not open file %r", pidfilename)
1006
uid = pwd.getpwnam("_mandos").pw_uid
1007
gid = pwd.getpwnam("_mandos").pw_gid
1010
uid = pwd.getpwnam("mandos").pw_uid
1011
gid = pwd.getpwnam("mandos").pw_gid
3093
global mandos_dbus_service
3094
mandos_dbus_service = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3102
interface=(server_settings["interface"] or None),
3104
gnutls_priority=server_settings["priority"],
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
1012
3125
except KeyError:
1014
uid = pwd.getpwnam("nobody").pw_uid
1015
gid = pwd.getpwnam("nogroup").pw_gid
1022
except OSError, error:
1023
if error[0] != errno.EPERM:
1027
service = AvahiService(name = server_settings["servicename"],
1028
servicetype = "_mandos._tcp", )
1029
if server_settings["interface"]:
1030
service.interface = (if_nametoindex
1031
(server_settings["interface"]))
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3136
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3143
# Enable all possible GnuTLS debugging
3145
# "Use a log level over 10 to enable all debugging options."
3147
gnutls.global_set_log_level(11)
3150
def debug_gnutls(level, string):
3151
logger.debug("GnuTLS: %s", string[:-1])
3153
gnutls.global_set_log_function(debug_gnutls)
3155
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3157
os.dup2(null, sys.stdin.fileno())
3161
# Need to fork before connecting to D-Bus
3163
# Close all input and output, do double fork, etc.
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
1033
3170
global main_loop
1036
3171
# From the Avahi example code
1037
DBusGMainLoop(set_as_default=True )
1038
main_loop = gobject.MainLoop()
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
1039
3174
bus = dbus.SystemBus()
1040
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1041
avahi.DBUS_PATH_SERVER),
1042
avahi.DBUS_INTERFACE_SERVER)
1043
3175
# End of Avahi example code
1045
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1047
clients.update(Set(Client(name = section,
1049
= dict(client_config.items(section)),
1050
use_dbus = use_dbus)
1051
for section in client_config.sections()))
1053
logger.warning(u"No clients defined")
1056
# Redirect stdin so all checkers get /dev/null
1057
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1058
os.dup2(null, sys.stdin.fileno())
1062
# No console logging
1063
logger.removeHandler(console)
1064
# Close all input and output, do double fork, etc.
1069
pidfile.write(str(pid) + "\n")
3178
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3184
except dbus.exceptions.DBusException as e:
3185
logger.error("Disabling D-Bus:", exc_info=e)
3187
server_settings["use_dbus"] = False
3188
tcp_server.use_dbus = False
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
3200
global multiprocessing_manager
3201
multiprocessing_manager = multiprocessing.Manager()
3203
client_class = Client
3205
client_class = functools.partial(ClientDBus, bus=bus)
3207
client_settings = Client.config_parser(client_config)
3208
old_client_settings = {}
3211
# This is used to redirect stdout and stderr for checker processes
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3216
if debug or not foreground:
3219
# Get client data and settings from last running state.
3220
if server_settings["restore"]:
3222
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3242
clients_data[key].items()}
3243
clients_data[key] = value
3245
value["client_structure"] = [
3247
if isinstance(s, bytes)
3249
value["client_structure"]]
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
3272
os.remove(stored_state_path)
3273
except IOError as e:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3278
logger.critical("Could not load persistent state:",
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
3286
with PGPEngine() as pgp:
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
3292
# Decide which value to use after restoring saved state.
3293
# We have three different values: Old config file,
3294
# new config file, and saved state.
3295
# New config value takes precedence if it differs from old
3296
# config value, otherwise use saved state.
3297
for name, value in client_settings[client_name].items():
3299
# For each value in new config, check if it
3300
# differs from the old config value (Except for
3301
# the "secret" attribute)
3302
if (name != "secret"
3304
old_client_settings[client_name][name])):
3305
client[name] = value
3309
# Clients who has passed its expire date can still be
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
3314
if client["enabled"]:
3315
if datetime.datetime.utcnow() >= client["expires"]:
3316
if not client["last_checked_ok"]:
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
3321
client["enabled"] = False
3322
elif client["last_checker_status"] != 0:
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3328
client["last_checker_status"]))
3329
client["enabled"] = False
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" keeping {} enabled".format(
3338
client["secret"] = pgp.decrypt(
3339
client["encrypted_secret"],
3340
client_settings[client_name]["secret"])
3342
# If decryption fails, we use secret from new settings
3343
logger.debug("Failed to decrypt {} old secret".format(
3345
client["secret"] = (client_settings[client_name]
3348
# Add/remove clients based on new changes made to config
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
3351
del clients_data[client_name]
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
3354
clients_data[client_name] = client_settings[client_name]
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
3358
tcp_server.clients[client_name] = client_class(
3361
server_settings=server_settings)
3363
if not tcp_server.clients:
3364
logger.warning("No clients defined")
3367
if pidfile is not None:
3371
print(pid, file=pidfile)
3373
logger.error("Could not write to file %r with PID %d",
1073
logger.error(u"Could not write to file %r with PID %d",
1076
# "pidfile" was never created
1081
"Cleanup function; run on exit"
1083
# From the Avahi example code
1084
if not group is None:
1087
# End of Avahi example code
1090
client = clients.pop()
1091
client.disable_hook = None
1094
atexit.register(cleanup)
1097
signal.signal(signal.SIGINT, signal.SIG_IGN)
1098
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1099
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
1102
class MandosServer(dbus.service.Object):
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
1103
3387
"""A D-Bus proxy object"""
1104
3389
def __init__(self):
1105
3390
dbus.service.Object.__init__(self, bus, "/")
1106
_interface = u"se.bsnet.fukt.Mandos"
1108
@dbus.service.signal(_interface, signature="oa{sv}")
1109
def ClientAdded(self, objpath, properties):
3392
_interface = "se.recompile.Mandos"
3394
@dbus.service.signal(_interface, signature="o")
3395
def ClientAdded(self, objpath):
3399
@dbus.service.signal(_interface, signature="ss")
3400
def ClientNotFound(self, key_id, address):
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1113
3406
@dbus.service.signal(_interface, signature="os")
1114
3407
def ClientRemoved(self, objpath, name):
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1118
3413
@dbus.service.method(_interface, out_signature="ao")
1119
3414
def GetAllClients(self):
1121
return dbus.Array(c.dbus_object_path for c in clients)
1123
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3421
@dbus.service.method(_interface,
3422
out_signature="a{oa{sv}}")
1124
3423
def GetAllClientsWithProperties(self):
1126
3425
return dbus.Dictionary(
1127
((c.dbus_object_path, c.GetAllProperties())
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
1129
3429
signature="oa{sv}")
1131
3431
@dbus.service.method(_interface, in_signature="o")
1132
3432
def RemoveClient(self, object_path):
3434
for c in tcp_server.clients.values():
1135
3435
if c.dbus_object_path == object_path:
1137
# Don't signal anything except ClientRemoved
1141
self.ClientRemoved(object_path, c.name)
3436
del tcp_server.clients[c.name]
3437
c.remove_from_connection()
3438
# Don't signal the disabling
3439
c.disable(quiet=True)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
3443
raise KeyError(object_path)
1147
mandos_server = MandosServer()
1149
for client in clients:
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3454
{interface: client.GetAll(interface)
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3466
{interface: client.GetAll(interface)
3468
client._get_all_interface_names()}))
3470
self.ClientAdded(client.dbus_object_path)
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3480
self.ClientRemoved(client.dbus_object_path,
3483
mandos_dbus_service = MandosDBusService()
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
3491
"Cleanup function; run on exit"
3495
mp.active_children()
3497
if not (tcp_server.clients or client_settings):
3500
# Store client before exiting. Secrets are encrypted with key
3501
# based on what config file has. If config file is
3502
# removed/edited, old secret will thus be unrecovable.
3504
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
3506
key = client_settings[client.name]["secret"]
3507
client.encrypted_secret = pgp.encrypt(client.secret,
3511
# A list of attributes that can not be pickled
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
3519
client_dict["encrypted_secret"] = (client
3521
for attr in client.client_structure:
3522
if attr not in exclude:
3523
client_dict[attr] = getattr(client, attr)
3525
clients[client.name] = client_dict
3526
del client_settings[client.name]["secret"]
3529
with tempfile.NamedTemporaryFile(
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3537
tempname = stored_state.name
3538
os.rename(tempname, stored_state_path)
3539
except (IOError, OSError) as e:
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3549
logger.warning("Could not save persistent state:",
3553
# Delete all clients, and settings from config
3554
while tcp_server.clients:
3555
name, client = tcp_server.clients.popitem()
3557
client.remove_from_connection()
3558
# Don't signal the disabling
3559
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
3562
mandos_dbus_service.client_removed_signal(client)
3563
client_settings.clear()
3565
atexit.register(cleanup)
3567
for client in tcp_server.clients.values():
1152
mandos_server.ClientAdded(client.dbus_object_path,
1153
client.GetAllProperties())
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
3571
# Need to initiate checking of clients
3573
client.init_checker()
1156
3575
tcp_server.enable()
1157
3576
tcp_server.server_activate()
1159
3578
# Find out what port we got
1160
service.port = tcp_server.socket.getsockname()[1]
1161
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1162
u" scope_id %d" % tcp_server.socket.getsockname())
1164
#service.interface = tcp_server.socket.getsockname()[3]
3580
service.port = tcp_server.socket.getsockname()[1]
3582
logger.info("Now listening on address %r, port %d,"
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3589
# service.interface = tcp_server.socket.getsockname()[3]
1167
# From the Avahi example code
1168
server.connect_to_signal("StateChanged", server_state_changed)
1170
server_state_changed(server.GetState())
1171
except dbus.exceptions.DBusException, error:
1172
logger.critical(u"DBusException: %s", error)
1174
# End of Avahi example code
1176
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1177
lambda *args, **kwargs:
1178
(tcp_server.handle_request
1179
(*args[2:], **kwargs) or True))
1181
logger.debug(u"Starting main loop")
3593
# From the Avahi example code
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3600
# End of Avahi example code
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*args[2:], **kwargs) or True))
3607
logger.debug("Starting main loop")
1182
3608
main_loop.run()
1183
except AvahiError, error:
1184
logger.critical(u"AvahiError: %s", error)
3609
except AvahiError as error:
3610
logger.critical("Avahi Error", exc_info=error)
1186
3613
except KeyboardInterrupt:
3615
print("", file=sys.stderr)
3616
logger.debug("Server received KeyboardInterrupt")
3617
logger.debug("Server exiting")
3618
# Must run before the D-Bus bus name gets deregistered
1190
3622
if __name__ == '__main__':