63
28
from dbus.mainloop.glib import DBusGMainLoop
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
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):
85
return repr(self.value)
87
class AvahiServiceError(AvahiError):
90
class AvahiGroupError(AvahiError):
94
class AvahiService(object):
95
"""An Avahi (Zeroconf) service.
97
interface: integer; avahi.IF_UNSPEC or an interface index.
98
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
101
See <http://www.dns-sd.org/ServiceTypes.html>
102
port: integer; what port to announce
103
TXT: list of strings; TXT record for the service
104
domain: string; Domain to publish on, default to .local if empty.
105
host: string; Host to publish records for, default is localhost
106
max_renames: integer; maximum number of renames
107
rename_count: integer; counter so we only rename after collisions
108
a sensible number of times
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
113
self.interface = interface
123
self.rename_count = 0
124
self.max_renames = max_renames
126
"""Derived from the Avahi example code"""
127
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
140
self.rename_count += 1
142
"""Derived from the Avahi example code"""
143
if group is not None:
146
"""Derived from the Avahi example code"""
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
167
# From the Avahi example code:
168
group = None # our entry group
31
# This variable is used to optionally bind to a specified interface.
32
# It is a global variable to fit in with the other variables from the
33
# Avahi server example code.
34
serviceInterface = avahi.IF_UNSPEC
35
# From the Avahi server example code:
36
serviceName = "Mandos"
37
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
38
servicePort = None # Not known at startup
39
serviceTXT = [] # TXT record for the service
40
domain = "" # Domain to publish on, default to .local
41
host = "" # Host to publish records for, default to localhost
42
group = None #our entry group
43
rename_count = 12 # Counter so we only rename after collisions a
44
# sensible number of times
169
45
# End of Avahi example code
176
52
fingerprint: string (40 or 32 hexadecimal digits); used to
177
53
uniquely identify the client
178
54
secret: bytestring; sent verbatim (over TLS) to client
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
55
fqdn: string (FQDN); available for use by the checker command
56
created: datetime.datetime()
57
last_seen: datetime.datetime() or None if not yet seen
58
timeout: datetime.timedelta(); How long from last_seen until
59
this client is invalid
184
60
interval: datetime.timedelta(); How often to start a new checker
185
61
stop_hook: If set, called by stop() as stop_hook(self)
186
62
checker: subprocess.Popen(); a running checker process used
187
63
to see if the client lives.
188
'None' if no process is running.
64
Is None if no process is running.
189
65
checker_initiator_tag: a gobject event source tag, or None
190
66
stop_initiator_tag: - '' -
191
67
checker_callback_tag: - '' -
192
68
checker_command: string; External command which is run to check if
193
client lives. %() expansions are done at
69
client lives. %()s expansions are done at
194
70
runtime with vars(self) as dict, so that for
195
71
instance %(name)s can be used in the command.
196
72
Private attibutes:
197
73
_timeout: Real variable for 'timeout'
198
74
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
75
_timeout_milliseconds: Used by gobject.timeout_add()
200
76
_interval_milliseconds: - '' -
202
78
def _set_timeout(self, timeout):
222
98
interval = property(lambda self: self._interval,
224
100
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
101
def __init__(self, name=None, options=None, stop_hook=None,
102
fingerprint=None, secret=None, secfile=None, fqdn=None,
103
timeout=None, interval=-1, checker=None):
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
234
self.fingerprint = config["fingerprint"].upper()\
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
105
# Uppercase and remove spaces from fingerprint
106
# for later comparison purposes with return value of
107
# the fingerprint() function
108
self.fingerprint = fingerprint.upper().replace(u" ", u"")
110
self.secret = secret.decode(u"base64")
241
113
self.secret = sf.read()
244
raise TypeError(u"No secret or secfile for client %s"
246
self.host = config.get("host", "")
116
raise RuntimeError(u"No secret or secfile for client %s"
118
self.fqdn = fqdn # string
247
119
self.created = datetime.datetime.now()
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
120
self.last_seen = None
122
timeout = options.timeout
123
self.timeout = timeout
125
interval = options.interval
127
interval = string_to_delta(interval)
128
self.interval = interval
251
129
self.stop_hook = stop_hook
252
130
self.checker = None
253
131
self.checker_initiator_tag = None
254
132
self.stop_initiator_tag = None
255
133
self.checker_callback_tag = None
256
self.check_command = config["checker"]
134
self.check_command = checker
258
"""Start this client's checker and timeout hooks"""
136
"""Start this clients checker and timeout hooks"""
259
137
# Schedule a new checker to be started an 'interval' from now,
260
138
# and every interval from then on.
261
139
self.checker_initiator_tag = gobject.timeout_add\
289
164
# Do not run this again if called by a gobject.timeout_add
291
166
def __del__(self):
292
self.stop_hook = None
167
# Some code duplication here and in stop()
168
if hasattr(self, "stop_initiator_tag") \
169
and self.stop_initiator_tag:
170
gobject.source_remove(self.stop_initiator_tag)
171
self.stop_initiator_tag = None
172
if hasattr(self, "checker_initiator_tag") \
173
and self.checker_initiator_tag:
174
gobject.source_remove(self.checker_initiator_tag)
175
self.checker_initiator_tag = None
294
177
def checker_callback(self, pid, condition):
295
178
"""The checker has completed, so take appropriate actions."""
296
179
now = datetime.datetime.now()
297
self.checker_callback_tag = None
299
180
if os.WIFEXITED(condition) \
300
181
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
303
self.last_checked_ok = now
183
sys.stderr.write(u"Checker for %(name)s succeeded\n"
304
186
gobject.source_remove(self.stop_initiator_tag)
305
187
self.stop_initiator_tag = gobject.timeout_add\
306
188
(self._timeout_milliseconds,
308
elif not os.WIFEXITED(condition):
309
logger.warning(u"Checker for %(name)s crashed?",
312
logger.info(u"Checker for %(name)s failed",
191
if not os.WIFEXITED(condition):
192
sys.stderr.write(u"Checker for %(name)s crashed?\n"
195
sys.stderr.write(u"Checker for %(name)s failed\n"
198
self.checker_callback_tag = None
314
199
def start_checker(self):
315
200
"""Start a new checker subprocess if one is not running.
316
201
If a checker already exists, leave it running and do
318
# The reason for not killing a running checker is that if we
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
323
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
326
203
if self.checker is None:
205
sys.stderr.write(u"Starting checker for %s\n"
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
208
command = self.check_command % self.fqdn
330
209
except TypeError:
331
# Escape attributes for the shell
332
210
escaped_attrs = dict((key, re.escape(str(val)))
334
212
vars(self).iteritems())
336
command = self.check_command % escaped_attrs
337
except TypeError, error:
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
340
return True # Try again later
213
command = self.check_command % escaped_attrs
342
logger.info(u"Starting checker %r for %s",
344
# We don't need to redirect stdout and stderr, since
345
# in normal mode, that is already done by daemon(),
346
# and in debug mode we don't want to. (Stdin is
347
# always replaced by /dev/null.)
348
self.checker = subprocess.Popen(command,
351
self.checker_callback_tag = gobject.child_watch_add\
353
self.checker_callback)
354
except OSError, error:
355
logger.error(u"Failed to start subprocess: %s",
215
self.checker = subprocess.\
217
stdout=subprocess.PIPE,
218
close_fds=True, shell=True,
220
self.checker_callback_tag = gobject.\
221
child_watch_add(self.checker.pid,
224
except subprocess.OSError, error:
225
sys.stderr.write(u"Failed to start subprocess: %s\n"
357
227
# Re-run this periodically if run by gobject.timeout_add
359
229
def stop_checker(self):
360
230
"""Force the checker process, if any, to stop."""
361
if self.checker_callback_tag:
362
gobject.source_remove(self.checker_callback_tag)
363
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
231
if not hasattr(self, "checker") or self.checker is None:
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
368
os.kill(self.checker.pid, signal.SIGTERM)
370
#if self.checker.poll() is None:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
373
if error.errno != errno.ESRCH: # No such process
233
gobject.source_remove(self.checker_callback_tag)
234
self.checker_callback_tag = None
235
os.kill(self.checker.pid, signal.SIGTERM)
236
if self.checker.poll() is None:
237
os.kill(self.checker.pid, signal.SIGKILL)
375
238
self.checker = None
376
def still_valid(self):
239
def still_valid(self, now=None):
377
240
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
242
now = datetime.datetime.now()
243
if self.last_seen is None:
380
244
return now < (self.created + self.timeout)
382
return now < (self.last_checked_ok + self.timeout)
246
return now < (self.last_seen + self.timeout)
385
249
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
250
# If not an OpenPGP certificate...
388
251
if gnutls.library.functions.gnutls_certificate_type_get\
389
252
(session._c_object) \
442
298
Note: This will run in its own forked process."""
444
300
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
453
if int(line.strip().split()[0]) > 1:
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
302
sys.stderr.write(u"TCP request came\n")
303
sys.stderr.write(u"Request: %s\n" % self.request)
304
sys.stderr.write(u"Client Address: %s\n"
305
% unicode(self.client_address))
306
sys.stderr.write(u"Server: %s\n" % self.server)
307
session = gnutls.connection.ClientSession(self.request,
464
311
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
312
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
467
priority = "NORMAL" # Fallback default, since this
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
314
priority = "SECURE256"
471
316
gnutls.library.functions.gnutls_priority_set_direct\
472
317
(session._c_object, priority, None);
475
320
session.handshake()
476
321
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
323
sys.stderr.write(u"Handshake failed: %s\n" % error)
478
324
# Do not run session.bye() here: the session is not
479
325
# established. Just abandon the request.
482
328
fpr = fingerprint(peer_certificate(session))
483
329
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
331
sys.stderr.write(u"Bad certificate: %s\n" % error)
487
logger.debug(u"Fingerprint: %s", fpr)
335
sys.stderr.write(u"Fingerprint: %s\n" % fpr)
489
for c in self.server.clients:
490
338
if c.fingerprint == fpr:
494
logger.warning(u"Client not found for fingerprint: %s",
498
341
# Have to check if client.still_valid(), since it is possible
499
342
# that the client timed out while establishing the GnuTLS
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
344
if (not client) or (not client.still_valid()):
347
sys.stderr.write(u"Client %(name)s is invalid\n"
350
sys.stderr.write(u"Client not found for "
351
u"fingerprint: %s\n" % fpr)
507
355
while sent_size < len(client.secret):
508
356
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
358
sys.stderr.write(u"Sent: %d, remaining: %d\n"
359
% (sent, len(client.secret)
360
- (sent_size + sent)))
512
361
sent_size += sent
516
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
519
settings: Server settings
368
options: Command line options
520
369
clients: Set() of Client objects
521
enabled: Boolean; whether this server is activated yet
523
371
address_family = socket.AF_INET6
524
372
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
528
376
if "clients" in kwargs:
529
377
self.clients = kwargs["clients"]
530
378
del kwargs["clients"]
532
379
return super(type(self), self).__init__(*args, **kwargs)
533
380
def server_bind(self):
534
381
"""This overrides the normal server_bind() function
535
382
to bind to an interface if one was specified, and also NOT to
536
383
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
541
389
self.socket.setsockopt(socket.SOL_SOCKET,
543
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
544
392
except socket.error, error:
545
393
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
394
sys.stderr.write(u"Warning: No permission to" \
395
u" bind to interface %s\n"
396
% self.options.interface)
551
399
# Only bind(2) the socket if we really need to.
585
421
datetime.timedelta(1)
586
422
>>> string_to_delta(u'1w')
587
423
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
589
datetime.timedelta(0, 330)
591
timevalue = datetime.timedelta(0)
592
for s in interval.split():
594
suffix=unicode(s[-1])
597
delta = datetime.timedelta(value)
599
delta = datetime.timedelta(0, value)
601
delta = datetime.timedelta(0, 0, 0, 0, value)
603
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
608
except (ValueError, IndexError):
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
429
delta = datetime.timedelta(value)
431
delta = datetime.timedelta(0, value)
433
delta = datetime.timedelta(0, 0, 0, 0, value)
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
440
except (ValueError, IndexError):
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
457
sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
458
% (serviceName, serviceType))
461
serviceInterface, # interface
462
avahi.PROTO_INET6, # protocol
463
dbus.UInt32(0), # flags
464
serviceName, serviceType,
466
dbus.UInt16(servicePort),
467
avahi.string_array_to_txt_array(serviceTXT))
471
def remove_service():
472
"""From the Avahi server example code"""
475
if not group is None:
614
479
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
480
"""From the Avahi server example code"""
616
481
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
482
sys.stderr.write(u"WARNING: Server name collision\n")
619
484
elif state == avahi.SERVER_RUNNING:
623
488
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
489
"""From the Avahi server example code"""
490
global serviceName, server, rename_count
493
sys.stderr.write(u"state change: %i\n" % state)
627
495
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
497
sys.stderr.write(u"Service established.\n")
629
498
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
500
rename_count = rename_count - 1
502
name = server.GetAlternativeServiceName(name)
503
sys.stderr.write(u"WARNING: Service name collision, "
504
u"changing name to '%s' ...\n" % name)
509
sys.stderr.write(u"ERROR: No suitable service name found "
510
u"after %i retries, exiting.\n"
632
513
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
635
raise AvahiGroupError("State changed: %s", str(error))
514
sys.stderr.write(u"Error in group state changed %s\n"
637
520
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
521
"""Call the C function if_nametoindex()"""
641
if "ctypes.util" not in sys.modules:
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
523
libc = ctypes.cdll.LoadLibrary("libc.so.6")
524
return libc.if_nametoindex(interface)
645
525
except (OSError, AttributeError):
646
526
if "struct" not in sys.modules:
648
528
if "fcntl" not in sys.modules:
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
662
def daemon(nochdir = False, noclose = False):
663
"""See daemon(3). Standard BSD Unix function.
664
This should really exist as os.daemon, but it doesn't (yet)."""
673
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
678
os.dup2(null, sys.stdin.fileno())
679
os.dup2(null, sys.stdout.fileno())
680
os.dup2(null, sys.stderr.fileno())
686
global main_loop_started
687
main_loop_started = False
689
parser = OptionParser(version = "%%prog %s" % version)
530
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
533
struct.pack("16s16x", interface))
535
interface_index = struct.unpack("I", ifreq[16:20])[0]
536
return interface_index
539
if __name__ == '__main__':
540
parser = OptionParser()
690
541
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
542
default=None, metavar="IF",
543
help="Bind to interface IF")
544
parser.add_option("--cert", type="string", default="cert.pem",
546
help="Public key certificate PEM file to use")
547
parser.add_option("--key", type="string", default="key.pem",
549
help="Private key PEM file to use")
550
parser.add_option("--ca", type="string", default="ca.pem",
552
help="Certificate Authority certificate PEM file to use")
553
parser.add_option("--crl", type="string", default="crl.pem",
555
help="Certificate Revokation List PEM file to use")
556
parser.add_option("-p", "--port", type="int", default=None,
695
557
help="Port number to receive requests on")
558
parser.add_option("--timeout", type="string", # Parsed later
560
help="Amount of downtime allowed for clients")
561
parser.add_option("--interval", type="string", # Parsed later
563
help="How often to check that a client is up")
696
564
parser.add_option("--check", action="store_true", default=False,
697
565
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
566
parser.add_option("--debug", action="store_true", default=False,
709
568
(options, args) = parser.parse_args()
711
570
if options.check:
713
572
doctest.testmod()
716
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
726
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
730
# Convert the SafeConfigParser object to a dict
731
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
737
# Override the settings from the config file with command line
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
741
value = getattr(options, option)
742
if value is not None:
743
server_settings[option] = value
745
# Now we have our good server settings in "server_settings"
747
debug = server_settings["debug"]
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
757
% server_settings["servicename"]))
759
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
762
"checker": "fping -q -- %(host)s",
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
773
settings=server_settings,
775
pidfilename = "/var/run/mandos.pid"
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
784
uid = pwd.getpwnam("mandos").pw_uid
787
uid = pwd.getpwnam("nobody").pw_uid
791
gid = pwd.getpwnam("mandos").pw_gid
794
gid = pwd.getpwnam("nogroup").pw_gid
800
except OSError, error:
801
if error[0] != errno.EPERM:
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
814
# From the Avahi example code
575
# Parse the time arguments
577
options.timeout = string_to_delta(options.timeout)
579
parser.error("option --timeout: Unparseable time")
581
options.interval = string_to_delta(options.interval)
583
parser.error("option --interval: Unparseable time")
586
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
587
client_config = ConfigParser.SafeConfigParser(defaults)
588
#client_config.readfp(open("secrets.conf"), "secrets.conf")
589
client_config.read("mandos-clients.conf")
591
# From the Avahi server example code
815
592
DBusGMainLoop(set_as_default=True )
816
593
main_loop = gobject.MainLoop()
817
594
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
595
server = dbus.Interface(
596
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
597
avahi.DBUS_INTERFACE_SERVER )
821
598
# End of Avahi example code
600
debug = options.debug
823
603
def remove_from_clients(client):
824
604
clients.remove(client)
826
logger.critical(u"No clients left, exiting")
607
sys.stderr.write(u"No clients left, exiting\n")
829
clients.update(Set(Client(name = section,
610
clients.update(Set(Client(name=section, options=options,
830
611
stop_hook = remove_from_clients,
832
= dict(client_config.items(section)))
612
**(dict(client_config\
833
614
for section in client_config.sections()))
835
logger.critical(u"No clients defined")
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
852
pidfile.write(str(pid) + "\n")
856
logger.error(u"Could not write to file %r with PID %d",
859
# "pidfile" was never created
864
"Cleanup function; run on exit"
866
# From the Avahi example code
867
if not group is None:
870
# End of Avahi example code
873
client = clients.pop()
874
client.stop_hook = None
877
atexit.register(cleanup)
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
884
615
for client in clients:
888
tcp_server.server_activate()
890
# Find out what port we got
891
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
895
#service.interface = tcp_server.socket.getsockname()[3]
618
tcp_server = IPv6_TCPServer((None, options.port),
622
# Find out what random port we got
623
servicePort = tcp_server.socket.getsockname()[1]
625
sys.stderr.write(u"Now listening on port %d\n" % servicePort)
627
if options.interface is not None:
628
serviceInterface = if_nametoindex(options.interface)
630
# From the Avahi server example code
631
server.connect_to_signal("StateChanged", server_state_changed)
632
server_state_changed(server.GetState())
633
# End of Avahi example code
635
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
636
lambda *args, **kwargs:
637
tcp_server.handle_request(*args[2:],
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
905
# End of Avahi example code
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
918
641
except KeyboardInterrupt:
922
if __name__ == '__main__':
646
# From the Avahi server example code
647
if not group is None:
649
# End of Avahi example code
651
for client in clients:
652
client.stop_hook = None