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:
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, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
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
233
logger.debug(u"Creating client %r", self.name)
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
237
self.fingerprint = config["fingerprint"].upper()\
166
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
168
self.secret = secret.decode(u"base64")
171
self.secret = sf.read()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(config["secfile"])
244
self.secret = secfile.read()
174
raise RuntimeError(u"No secret or secfile for client %s"
176
self.fqdn = fqdn # string
247
raise TypeError(u"No secret or secfile for client %s"
249
self.host = config.get("host", "")
177
250
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
181
254
self.stop_hook = stop_hook
182
255
self.checker = None
183
256
self.checker_initiator_tag = None
184
257
self.stop_initiator_tag = None
185
258
self.checker_callback_tag = None
186
self.check_command = checker
259
self.check_command = config["checker"]
188
261
"""Start this client's checker and timeout hooks"""
189
262
# Schedule a new checker to be started an 'interval' from now,
201
274
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
275
The possibility that a client might be restarted is left open,
276
but not currently used."""
204
277
# If this client doesn't have a secret, it is already stopped.
206
logger.debug(u"Stopping client %s", self.name)
278
if hasattr(self, "secret") and self.secret:
279
logger.info(u"Stopping client %s", self.name)
207
280
self.secret = None
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
283
if getattr(self, "stop_initiator_tag", False):
212
284
gobject.source_remove(self.stop_initiator_tag)
213
285
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
286
if getattr(self, "checker_initiator_tag", False):
216
287
gobject.source_remove(self.checker_initiator_tag)
217
288
self.checker_initiator_tag = None
218
289
self.stop_checker()
257
328
# is as it should be.
258
329
if self.checker is None:
260
command = self.check_command % self.fqdn
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
261
333
except TypeError:
334
# Escape attributes for the shell
262
335
escaped_attrs = dict((key, re.escape(str(val)))
264
337
vars(self).iteritems())
266
339
command = self.check_command % escaped_attrs
267
340
except TypeError, error:
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
341
logger.error(u'Could not format string "%s":'
342
u' %s', self.check_command, error)
270
343
return True # Try again later
272
logger.debug(u"Starting checker %r for %s",
274
self.checker = subprocess.\
276
close_fds=True, shell=True,
345
logger.info(u"Starting checker %r for %s",
347
# We don't need to redirect stdout and stderr, since
348
# in normal mode, that is already done by daemon(),
349
# and in debug mode we don't want to. (Stdin is
350
# always replaced by /dev/null.)
351
self.checker = subprocess.Popen(command,
278
354
self.checker_callback_tag = gobject.child_watch_add\
279
355
(self.checker.pid,
280
356
self.checker_callback)
281
except subprocess.OSError, error:
357
except OSError, error:
282
358
logger.error(u"Failed to start subprocess: %s",
284
360
# Re-run this periodically if run by gobject.timeout_add
288
364
if self.checker_callback_tag:
289
365
gobject.source_remove(self.checker_callback_tag)
290
366
self.checker_callback_tag = None
291
if not hasattr(self, "checker") or self.checker is None:
367
if getattr(self, "checker", None) is None:
293
logger.debug("Stopping checker for %(name)s", vars(self))
369
logger.debug(u"Stopping checker for %(name)s", vars(self))
295
371
os.kill(self.checker.pid, signal.SIGTERM)
297
373
#if self.checker.poll() is None:
298
374
# os.kill(self.checker.pid, signal.SIGKILL)
299
375
except OSError, error:
300
if error.errno != errno.ESRCH:
376
if error.errno != errno.ESRCH: # No such process
302
378
self.checker = None
303
def still_valid(self, now=None):
379
def still_valid(self):
304
380
"""Has the timeout not yet passed for this client?"""
306
now = datetime.datetime.now()
307
if self.last_seen is None:
381
now = datetime.datetime.now()
382
if self.last_checked_ok is None:
308
383
return now < (self.created + self.timeout)
310
return now < (self.last_seen + self.timeout)
385
return now < (self.last_checked_ok + self.timeout)
313
388
def peer_certificate(session):
330
405
def fingerprint(openpgp):
331
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
332
# New empty GnuTLS certificate
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
334
gnutls.library.functions.gnutls_openpgp_crt_init\
336
407
# New GnuTLS "datum" with the OpenPGP public key
337
408
datum = gnutls.library.types.gnutls_datum_t\
338
409
(ctypes.cast(ctypes.c_char_p(openpgp),
339
410
ctypes.POINTER(ctypes.c_ubyte)),
340
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
341
416
# Import the OpenPGP public key into the certificate
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
346
427
# New buffer for the fingerprint
347
buffer = ctypes.create_string_buffer(20)
348
buffer_length = ctypes.c_size_t()
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
349
430
# Get the fingerprint from the certificate into the buffer
350
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
351
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
352
433
# Deinit the certificate
353
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
354
435
# Convert the buffer to a Python bytestring
355
fpr = ctypes.string_at(buffer, buffer_length.value)
436
fpr = ctypes.string_at(buf, buf_len.value)
356
437
# Convert the bytestring to hexadecimal notation
357
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
362
443
"""A TCP request handler class.
363
444
Instantiated by IPv6_TCPServer for each request to handle it.
364
445
Note: This will run in its own forked process."""
366
447
def handle(self):
367
logger.debug(u"TCP connection from: %s",
448
logger.info(u"TCP connection from: %s",
368
449
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
456
if int(line.strip().split()[0]) > 1:
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
373
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
374
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
377
if self.server.options.priority:
378
priority = self.server.options.priority
470
priority = "NORMAL" # Fallback default, since this
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
379
474
gnutls.library.functions.gnutls_priority_set_direct\
380
(session._c_object, priority, None);
475
(session._c_object, priority, None)
383
478
session.handshake()
384
479
except gnutls.errors.GNUTLSError, error:
385
logger.debug(u"Handshake failed: %s", error)
480
logger.warning(u"Handshake failed: %s", error)
386
481
# Do not run session.bye() here: the session is not
387
482
# established. Just abandon the request.
390
485
fpr = fingerprint(peer_certificate(session))
391
486
except (TypeError, gnutls.errors.GNUTLSError), error:
392
logger.debug(u"Bad certificate: %s", error)
487
logger.warning(u"Bad certificate: %s", error)
395
490
logger.debug(u"Fingerprint: %s", fpr)
423
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
426
options: Command line options
522
settings: Server settings
427
523
clients: Set() of Client objects
524
enabled: Boolean; whether this server is activated yet
429
526
address_family = socket.AF_INET6
430
527
def __init__(self, *args, **kwargs):
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
434
531
if "clients" in kwargs:
435
532
self.clients = kwargs["clients"]
436
533
del kwargs["clients"]
437
return super(type(self), self).__init__(*args, **kwargs)
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
438
536
def server_bind(self):
439
537
"""This overrides the normal server_bind() function
440
538
to bind to an interface if one was specified, and also NOT to
441
539
bind to an address or port if they were not specified."""
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
447
544
self.socket.setsockopt(socket.SOL_SOCKET,
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
546
self.settings["interface"])
450
547
except socket.error, error:
451
548
if error[0] == errno.EPERM:
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
457
554
# Only bind(2) the socket if we really need to.
479
588
datetime.timedelta(1)
480
589
>>> string_to_delta(u'1w')
481
590
datetime.timedelta(7)
591
>>> string_to_delta('5m 30s')
592
datetime.timedelta(0, 330)
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
487
delta = datetime.timedelta(value)
489
delta = datetime.timedelta(0, value)
491
delta = datetime.timedelta(0, 0, 0, 0, value)
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
594
timevalue = datetime.timedelta(0)
595
for s in interval.split():
597
suffix = unicode(s[-1])
600
delta = datetime.timedelta(value)
602
delta = datetime.timedelta(0, value)
604
delta = datetime.timedelta(0, 0, 0, 0, value)
606
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
608
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
611
except (ValueError, IndexError):
498
except (ValueError, IndexError):
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
528
def remove_service():
529
"""From the Avahi example code"""
532
if not group is None:
536
617
def server_state_changed(state):
537
618
"""Derived from the Avahi example code"""
538
619
if state == avahi.SERVER_COLLISION:
539
logger.warning(u"Server name collision")
620
logger.error(u"Zeroconf server name collision")
541
622
elif state == avahi.SERVER_RUNNING:
545
626
def entry_group_state_changed(state, error):
546
627
"""Derived from the Avahi example code"""
547
global serviceName, server, rename_count
549
logger.debug(u"state change: %i", state)
628
logger.debug(u"Avahi state change: %i", state)
551
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
552
logger.debug(u"Service established.")
631
logger.debug(u"Zeroconf service established.")
553
632
elif state == avahi.ENTRY_GROUP_COLLISION:
555
rename_count = rename_count - 1
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
633
logger.warning(u"Zeroconf service name collision.")
567
635
elif state == avahi.ENTRY_GROUP_FAILURE:
568
logger.error(u"Error in group state changed %s",
636
logger.critical(u"Avahi: Error in group state changed %s",
638
raise AvahiGroupError("State changed: %s", str(error))
573
640
def if_nametoindex(interface):
574
"""Call the C function if_nametoindex()"""
641
"""Call the C function if_nametoindex(), or equivalent"""
642
global if_nametoindex
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
578
646
except (OSError, AttributeError):
579
647
if "struct" not in sys.modules:
581
649
if "fcntl" not in sys.modules:
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
592
def daemon(nochdir, noclose):
651
def if_nametoindex(interface):
652
"Get an interface index the hard way, i.e. using fcntl()"
653
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
659
return interface_index
660
return if_nametoindex(interface)
663
def daemon(nochdir = False, noclose = False):
593
664
"""See daemon(3). Standard BSD Unix function.
594
665
This should really exist as os.daemon, but it doesn't (yet)."""
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
616
if main_loop_started:
625
global main_loop_started
626
main_loop_started = False
628
parser = OptionParser()
687
parser = OptionParser(version = "%%prog %s" % version)
629
688
parser.add_option("-i", "--interface", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
633
691
help="Address to listen for requests on")
634
parser.add_option("-p", "--port", type="int", default=None,
692
parser.add_option("-p", "--port", type="int",
635
693
help="Port number to receive requests on")
636
694
parser.add_option("--check", action="store_true", default=False,
637
695
help="Run self-test")
638
parser.add_option("--debug", action="store_true", default=False,
640
parser.add_option("--priority", type="string",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
646
(options, args) = parser.parse_args()
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
707
options = parser.parse_args()[0]
648
709
if options.check:
650
711
doctest.testmod()
654
defaults = { "timeout": "1h",
656
"checker": "fping -q -- %%(fqdn)s",
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
663
serviceName = options.servicename;
714
# Default values for config file for server-global settings
715
server_defaults = { "interface": "",
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
"servicename": "Mandos",
724
# Parse config file for server-global settings
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
728
# Convert the SafeConfigParser object to a dict
729
server_settings = server_config.defaults()
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
735
# Override the settings from the config file with command line
737
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
739
value = getattr(options, option)
740
if value is not None:
741
server_settings[option] = value
743
# Now we have our good server settings in "server_settings"
745
debug = server_settings["debug"]
748
syslogger.setLevel(logging.WARNING)
749
console.setLevel(logging.WARNING)
751
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
755
% server_settings["servicename"]))
757
# Parse config file with clients
758
client_defaults = { "timeout": "1h",
760
"checker": "fping -q -- %(host)s",
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
764
client_config.read(os.path.join(server_settings["configdir"],
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
771
settings=server_settings,
773
pidfilename = "/var/run/mandos.pid"
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
782
uid = pwd.getpwnam("mandos").pw_uid
785
uid = pwd.getpwnam("nobody").pw_uid
789
gid = pwd.getpwnam("mandos").pw_gid
792
gid = pwd.getpwnam("nogroup").pw_gid
798
except OSError, error:
799
if error[0] != errno.EPERM:
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
669
813
DBusGMainLoop(set_as_default=True )
670
814
main_loop = gobject.MainLoop()
671
815
bus = dbus.SystemBus()
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
675
819
# End of Avahi example code
677
debug = options.debug
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
688
821
def remove_from_clients(client):
689
822
clients.remove(client)
691
logger.debug(u"No clients left, exiting")
824
logger.critical(u"No clients left, exiting")
694
clients.update(Set(Client(name=section,
827
clients.update(Set(Client(name = section,
695
828
stop_hook = remove_from_clients,
696
**(dict(client_config\
830
= dict(client_config.items(section)))
698
831
for section in client_config.sections()))
833
logger.critical(u"No clients defined")
837
# Redirect stdin so all checkers get /dev/null
838
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
839
os.dup2(null, sys.stdin.fileno())
844
logger.removeHandler(console)
845
# Close all input and output, do double fork, etc.
850
pidfile.write(str(pid) + "\n")
854
logger.error(u"Could not write to file %r with PID %d",
857
# "pidfile" was never created
704
862
"Cleanup function; run on exit"
720
878
signal.signal(signal.SIGINT, signal.SIG_IGN)
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
724
882
for client in clients:
727
tcp_server = IPv6_TCPServer((options.address, options.port),
731
# Find out what random port we got
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
747
# End of Avahi example code
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
754
logger.debug("Starting main loop")
755
main_loop_started = True
886
tcp_server.server_activate()
888
# Find out what port we got
889
service.port = tcp_server.socket.getsockname()[1]
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
893
#service.interface = tcp_server.socket.getsockname()[3]
896
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
899
server_state_changed(server.GetState())
900
except dbus.exceptions.DBusException, error:
901
logger.critical(u"DBusException: %s", error)
903
# End of Avahi example code
905
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
906
lambda *args, **kwargs:
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
910
logger.debug(u"Starting main loop")
912
except AvahiError, error:
913
logger.critical(u"AvahiError: %s" + unicode(error))
757
915
except KeyboardInterrupt:
763
919
if __name__ == '__main__':