57
56
import logging.handlers
62
62
from dbus.mainloop.glib import DBusGMainLoop
65
# Brief description of the operation of this program:
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
77
68
logger = logging.Logger('mandos')
78
69
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
80
72
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
73
('Mandos: %(levelname)s: %(message)s'))
82
74
logger.addHandler(syslogger)
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
88
serviceInterface = avahi.IF_UNSPEC
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
79
logger.addHandler(console)
81
class AvahiError(Exception):
82
def __init__(self, value):
84
super(AvahiError, self).__init__()
86
return repr(self.value)
88
class AvahiServiceError(AvahiError):
91
class AvahiGroupError(AvahiError):
95
class AvahiService(object):
96
"""An Avahi (Zeroconf) service.
98
interface: integer; avahi.IF_UNSPEC or an interface index.
99
Used to optionally bind to the specified interface.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
102
See <http://www.dns-sd.org/ServiceTypes.html>
103
port: integer; what port to announce
104
TXT: list of strings; TXT record for the service
105
domain: string; Domain to publish on, default to .local if empty.
106
host: string; Host to publish records for, default is localhost
107
max_renames: integer; maximum number of renames
108
rename_count: integer; counter so we only rename after collisions
109
a sensible number of times
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
114
self.interface = interface
116
self.type = servicetype
124
self.rename_count = 0
125
self.max_renames = max_renames
127
"""Derived from the Avahi example code"""
128
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
132
raise AvahiServiceError("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))
141
self.rename_count += 1
143
"""Derived from the Avahi example code"""
144
if group is not None:
147
"""Derived from the Avahi example code"""
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
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))
89
168
# From the Avahi example code:
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
169
group = None # our entry group
99
170
# End of Avahi example code
106
177
fingerprint: string (40 or 32 hexadecimal digits); used to
107
178
uniquely identify the client
108
179
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
114
185
interval: datetime.timedelta(); How often to start a new checker
115
186
stop_hook: If set, called by stop() as stop_hook(self)
116
187
checker: subprocess.Popen(); a running checker process used
117
188
to see if the client lives.
118
Is None if no process is running.
189
'None' if no process is running.
119
190
checker_initiator_tag: a gobject event source tag, or None
120
191
stop_initiator_tag: - '' -
121
192
checker_callback_tag: - '' -
122
193
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
194
client lives. %() expansions are done at
124
195
runtime with vars(self) as dict, so that for
125
196
instance %(name)s can be used in the command.
126
197
Private attibutes:
127
198
_timeout: Real variable for 'timeout'
128
199
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
130
201
_interval_milliseconds: - '' -
132
203
def _set_timeout(self, timeout):
152
223
interval = property(lambda self: self._interval,
154
225
del _set_interval
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
226
def __init__(self, name = None, stop_hook=None, config=None):
227
"""Note: the 'checker' key in 'config' sets the
228
'checker_command' attribute and *not* the 'checker'
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
166
self.secret = secret.decode(u"base64")
169
self.secret = sf.read()
233
logger.debug(u"Creating client %r", self.name)
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
237
self.fingerprint = config["fingerprint"].upper()\
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
172
raise RuntimeError(u"No secret or secfile for client %s"
174
self.fqdn = fqdn # string
248
raise TypeError(u"No secret or secfile for client %s"
250
self.host = config.get("host", "")
175
251
self.created = datetime.datetime.now()
176
self.last_seen = None
178
self.timeout = options.timeout
180
self.timeout = string_to_delta(timeout)
182
self.interval = options.interval
184
self.interval = string_to_delta(interval)
252
self.last_checked_ok = None
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
185
255
self.stop_hook = stop_hook
186
256
self.checker = None
187
257
self.checker_initiator_tag = None
188
258
self.stop_initiator_tag = None
189
259
self.checker_callback_tag = None
190
self.check_command = checker
260
self.check_command = config["checker"]
192
262
"""Start this client's checker and timeout hooks"""
193
263
# Schedule a new checker to be started an 'interval' from now,
205
275
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
208
278
# If this client doesn't have a secret, it is already stopped.
210
logger.debug(u"Stopping client %s", self.name)
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
211
281
self.secret = None
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
284
if getattr(self, "stop_initiator_tag", False):
216
285
gobject.source_remove(self.stop_initiator_tag)
217
286
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
287
if getattr(self, "checker_initiator_tag", False):
220
288
gobject.source_remove(self.checker_initiator_tag)
221
289
self.checker_initiator_tag = None
222
290
self.stop_checker()
261
329
# is as it should be.
262
330
if self.checker is None:
264
command = self.check_command % self.fqdn
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
265
334
except TypeError:
335
# Escape attributes for the shell
266
336
escaped_attrs = dict((key, re.escape(str(val)))
268
338
vars(self).iteritems())
270
340
command = self.check_command % escaped_attrs
271
341
except TypeError, error:
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
342
logger.error(u'Could not format string "%s":'
343
u' %s', self.check_command, error)
274
344
return True # Try again later
276
logger.debug(u"Starting checker %r for %s",
278
self.checker = subprocess.\
280
close_fds=True, shell=True,
346
logger.info(u"Starting checker %r for %s",
348
# We don't need to redirect stdout and stderr, since
349
# in normal mode, that is already done by daemon(),
350
# and in debug mode we don't want to. (Stdin is
351
# always replaced by /dev/null.)
352
self.checker = subprocess.Popen(command,
282
355
self.checker_callback_tag = gobject.child_watch_add\
283
356
(self.checker.pid,
284
357
self.checker_callback)
285
except subprocess.OSError, error:
358
except OSError, error:
286
359
logger.error(u"Failed to start subprocess: %s",
288
361
# Re-run this periodically if run by gobject.timeout_add
292
365
if self.checker_callback_tag:
293
366
gobject.source_remove(self.checker_callback_tag)
294
367
self.checker_callback_tag = None
295
if not hasattr(self, "checker") or self.checker is None:
368
if getattr(self, "checker", None) is None:
297
logger.debug("Stopping checker for %(name)s", vars(self))
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
299
372
os.kill(self.checker.pid, signal.SIGTERM)
301
374
#if self.checker.poll() is None:
302
375
# os.kill(self.checker.pid, signal.SIGKILL)
303
376
except OSError, error:
304
if error.errno != errno.ESRCH:
377
if error.errno != errno.ESRCH: # No such process
306
379
self.checker = None
307
def still_valid(self, now=None):
380
def still_valid(self):
308
381
"""Has the timeout not yet passed for this client?"""
310
now = datetime.datetime.now()
311
if self.last_seen is None:
382
now = datetime.datetime.now()
383
if self.last_checked_ok is None:
312
384
return now < (self.created + self.timeout)
314
return now < (self.last_seen + self.timeout)
386
return now < (self.last_checked_ok + self.timeout)
317
389
def peer_certificate(session):
334
406
def fingerprint(openpgp):
335
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
340
408
# New GnuTLS "datum" with the OpenPGP public key
341
409
datum = gnutls.library.types.gnutls_datum_t\
342
410
(ctypes.cast(ctypes.c_char_p(openpgp),
343
411
ctypes.POINTER(ctypes.c_ubyte)),
344
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
345
417
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
350
428
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
353
431
# Get the fingerprint from the certificate into the buffer
354
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
356
434
# Deinit the certificate
357
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
436
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
437
fpr = ctypes.string_at(buf, buf_len.value)
360
438
# Convert the bytestring to hexadecimal notation
361
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
366
444
"""A TCP request handler class.
367
445
Instantiated by IPv6_TCPServer for each request to handle it.
368
446
Note: This will run in its own forked process."""
370
448
def handle(self):
371
logger.debug(u"TCP connection from: %s",
449
logger.info(u"TCP connection from: %s",
372
450
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
457
if int(line.strip().split()[0]) > 1:
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
377
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
380
priority = "SECURE256"
471
priority = "NORMAL" # Fallback default, since this
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
382
475
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
476
(session._c_object, priority, None)
386
479
session.handshake()
387
480
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
481
logger.warning(u"Handshake failed: %s", error)
389
482
# Do not run session.bye() here: the session is not
390
483
# established. Just abandon the request.
393
486
fpr = fingerprint(peer_certificate(session))
394
487
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
488
logger.warning(u"Bad certificate: %s", error)
398
491
logger.debug(u"Fingerprint: %s", fpr)
426
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
429
options: Command line options
523
settings: Server settings
430
524
clients: Set() of Client objects
525
enabled: Boolean; whether this server is activated yet
432
527
address_family = socket.AF_INET6
433
528
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
437
532
if "clients" in kwargs:
438
533
self.clients = kwargs["clients"]
439
534
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
441
537
def server_bind(self):
442
538
"""This overrides the normal server_bind() function
443
539
to bind to an interface if one was specified, and also NOT to
444
540
bind to an address or port if they were not specified."""
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
450
545
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
547
self.settings["interface"])
453
548
except socket.error, error:
454
549
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
460
555
# Only bind(2) the socket if we really need to.
482
589
datetime.timedelta(1)
483
590
>>> string_to_delta(u'1w')
484
591
datetime.timedelta(7)
592
>>> string_to_delta('5m 30s')
593
datetime.timedelta(0, 330)
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
490
delta = datetime.timedelta(value)
492
delta = datetime.timedelta(0, value)
494
delta = datetime.timedelta(0, 0, 0, 0, value)
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
595
timevalue = datetime.timedelta(0)
596
for s in interval.split():
598
suffix = unicode(s[-1])
601
delta = datetime.timedelta(value)
603
delta = datetime.timedelta(0, value)
605
delta = datetime.timedelta(0, 0, 0, 0, value)
607
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
612
except (ValueError, IndexError):
501
except (ValueError, IndexError):
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
531
def remove_service():
532
"""From the Avahi example code"""
535
if not group is None:
539
618
def server_state_changed(state):
540
619
"""Derived from the Avahi example code"""
541
620
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
621
logger.error(u"Zeroconf server name collision")
544
623
elif state == avahi.SERVER_RUNNING:
548
627
def entry_group_state_changed(state, error):
549
628
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
552
logger.debug(u"state change: %i", state)
629
logger.debug(u"Avahi state change: %i", state)
554
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
632
logger.debug(u"Zeroconf service established.")
556
633
elif state == avahi.ENTRY_GROUP_COLLISION:
558
rename_count = rename_count - 1
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
634
logger.warning(u"Zeroconf service name collision.")
570
636
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
637
logger.critical(u"Avahi: Error in group state changed %s",
639
raise AvahiGroupError("State changed: %s", str(error))
576
641
def if_nametoindex(interface):
577
"""Call the C function if_nametoindex()"""
642
"""Call the C function if_nametoindex(), or equivalent"""
643
global if_nametoindex
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
581
647
except (OSError, AttributeError):
582
648
if "struct" not in sys.modules:
584
650
if "fcntl" not in sys.modules:
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
595
def daemon(nochdir, noclose):
652
def if_nametoindex(interface):
653
"Get an interface index the hard way, i.e. using fcntl()"
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
660
return interface_index
661
return if_nametoindex(interface)
664
def daemon(nochdir = False, noclose = False):
596
665
"""See daemon(3). Standard BSD Unix function.
597
666
This should really exist as os.daemon, but it doesn't (yet)."""
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
619
if main_loop_started:
628
global main_loop_started
629
main_loop_started = False
631
parser = OptionParser()
688
parser = OptionParser(version = "%%prog %s" % version)
632
689
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
636
692
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
693
parser.add_option("-p", "--port", type="int",
638
694
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
644
help="How often to check that a client is up")
645
695
parser.add_option("--check", action="store_true", default=False,
646
696
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
649
(options, args) = parser.parse_args()
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
708
options = parser.parse_args()[0]
651
710
if options.check:
653
712
doctest.testmod()
656
# Parse the time arguments
658
options.timeout = string_to_delta(options.timeout)
660
parser.error("option --timeout: Unparseable time")
662
options.interval = string_to_delta(options.interval)
664
parser.error("option --interval: Unparseable time")
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
715
# Default values for config file for server-global settings
716
server_defaults = { "interface": "",
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
725
# Parse config file for server-global settings
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
729
# Convert the SafeConfigParser object to a dict
730
server_settings = server_config.defaults()
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
736
# Override the settings from the config file with command line
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
740
value = getattr(options, option)
741
if value is not None:
742
server_settings[option] = value
744
# Now we have our good server settings in "server_settings"
746
debug = server_settings["debug"]
749
syslogger.setLevel(logging.WARNING)
750
console.setLevel(logging.WARNING)
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
756
% server_settings["servicename"]))
758
# Parse config file with clients
759
client_defaults = { "timeout": "1h",
761
"checker": "fping -q -- %(host)s",
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
772
settings=server_settings,
774
pidfilename = "/var/run/mandos.pid"
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
783
uid = pwd.getpwnam("mandos").pw_uid
786
uid = pwd.getpwnam("nobody").pw_uid
790
gid = pwd.getpwnam("mandos").pw_gid
793
gid = pwd.getpwnam("nogroup").pw_gid
799
except OSError, error:
800
if error[0] != errno.EPERM:
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
676
814
DBusGMainLoop(set_as_default=True )
677
815
main_loop = gobject.MainLoop()
678
816
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
682
820
# End of Avahi example code
684
debug = options.debug
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
695
822
def remove_from_clients(client):
696
823
clients.remove(client)
698
logger.debug(u"No clients left, exiting")
825
logger.critical(u"No clients left, exiting")
701
clients.update(Set(Client(name=section, options=options,
828
clients.update(Set(Client(name = section,
702
829
stop_hook = remove_from_clients,
703
**(dict(client_config\
831
= dict(client_config.items(section)))
705
832
for section in client_config.sections()))
834
logger.critical(u"No clients defined")
838
# Redirect stdin so all checkers get /dev/null
839
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
840
os.dup2(null, sys.stdin.fileno())
845
logger.removeHandler(console)
846
# Close all input and output, do double fork, etc.
851
pidfile.write(str(pid) + "\n")
855
logger.error(u"Could not write to file %r with PID %d",
858
# "pidfile" was never created
711
863
"Cleanup function; run on exit"
727
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
731
883
for client in clients:
734
tcp_server = IPv6_TCPServer((options.address, options.port),
738
# Find out what random port we got
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
754
# End of Avahi example code
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
761
logger.debug("Starting main loop")
762
main_loop_started = True
887
tcp_server.server_activate()
889
# Find out what port we got
890
service.port = tcp_server.socket.getsockname()[1]
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
894
#service.interface = tcp_server.socket.getsockname()[3]
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
900
server_state_changed(server.GetState())
901
except dbus.exceptions.DBusException, error:
902
logger.critical(u"DBusException: %s", error)
904
# End of Avahi example code
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
907
lambda *args, **kwargs:
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
911
logger.debug(u"Starting main loop")
913
except AvahiError, error:
914
logger.critical(u"AvahiError: %s" + unicode(error))
764
916
except KeyboardInterrupt:
770
920
if __name__ == '__main__':