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- Committer: Björn Påhlsson
- Date: 2008-08-03 14:57:46 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 41.
- Revision ID: belorn@braxen-20080803145746-4boahihngi1uwjap
merge commit
- files added:
- server.conf
- files removed:
- plugins.d/Makefile
- files renamed:
- mandos-clients.conf => clients.conf
- files modified:
- Makefile
added
removed
server.py
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1
#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# following functions: "AvahiService.add", "AvahiService.remove",
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# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
#
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
17
# it under the terms of the GNU General Public License as published by
18
# the Free Software Foundation, either version 3 of the License, or
19
# (at your option) any later version.
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#
21
# This program is distributed in the hope that it will be useful,
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
23
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24
# GNU General Public License for more details.
25
#
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
3
31
4
32
from __future__ import division
5
33
24
52
import subprocess
25
53
import atexit
26
54
import stat
55
import logging
56
import logging.handlers
27
57
28
58
import dbus
29
59
import gobject
31
61
from dbus.mainloop.glib import DBusGMainLoop
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62
import ctypes
33
63
34
import logging
35
import logging.handlers
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
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# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
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# supply an OpenPGP certificate, and the fingerprint of this
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# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
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# authentication or authorization is done by this server.
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36
75
37
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logger = logging.Logger('mandos')
38
77
syslogger = logging.handlers.SysLogHandler\
42
81
logger.addHandler(syslogger)
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82
del syslogger
44
83
45
# This variable is used to optionally bind to a specified interface.
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# It is a global variable to fit in with the other variables from the
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# Avahi server example code.
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serviceInterface = avahi.IF_UNSPEC
49
# From the Avahi server example code:
50
serviceName = "Mandos"
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serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
52
servicePort = None # Not known at startup
53
serviceTXT = [] # TXT record for the service
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domain = "" # Domain to publish on, default to .local
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host = "" # Host to publish records for, default to localhost
56
group = None #our entry group
57
rename_count = 12 # Counter so we only rename after collisions a
58
# sensible number of times
84
85
class AvahiError(Exception):
86
def __init__(self, value):
87
self.value = value
88
def __str__(self):
89
return repr(self.value)
90
91
class AvahiServiceError(AvahiError):
92
pass
93
94
class AvahiGroupError(AvahiError):
95
pass
96
97
98
class AvahiService(object):
99
"""
100
interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
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max_renames = integer; maximum number of renames
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rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
113
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
118
self.interface = interface
119
self.name = name
120
self.type = type
121
self.port = port
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
126
self.domain = domain
127
self.host = host
128
self.rename_count = 0
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
134
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
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self.remove()
138
self.add()
139
self.rename_count += 1
140
def remove(self):
141
"""Derived from the Avahi example code"""
142
if group is not None:
143
group.Reset()
144
def add(self):
145
"""Derived from the Avahi example code"""
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
59
168
# End of Avahi example code
60
169
61
170
67
176
uniquely identify the client
68
177
secret: bytestring; sent verbatim (over TLS) to client
69
178
fqdn: string (FQDN); available for use by the checker command
70
created: datetime.datetime()
71
last_seen: datetime.datetime() or None if not yet seen
72
timeout: datetime.timedelta(); How long from last_seen until
73
this client is invalid
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
74
183
interval: datetime.timedelta(); How often to start a new checker
75
184
stop_hook: If set, called by stop() as stop_hook(self)
76
185
checker: subprocess.Popen(); a running checker process used
77
186
to see if the client lives.
78
Is None if no process is running.
187
'None' if no process is running.
79
188
checker_initiator_tag: a gobject event source tag, or None
80
189
stop_initiator_tag: - '' -
81
190
checker_callback_tag: - '' -
82
191
checker_command: string; External command which is run to check if
83
client lives. %()s expansions are done at
192
client lives. %() expansions are done at
84
193
runtime with vars(self) as dict, so that for
85
194
instance %(name)s can be used in the command.
86
195
Private attibutes:
87
196
_timeout: Real variable for 'timeout'
88
197
_interval: Real variable for 'interval'
89
_timeout_milliseconds: Used by gobject.timeout_add()
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
90
199
_interval_milliseconds: - '' -
91
200
"""
92
201
def _set_timeout(self, timeout):
112
221
interval = property(lambda self: self._interval,
113
222
_set_interval)
114
223
del _set_interval
115
def __init__(self, name=None, options=None, stop_hook=None,
116
fingerprint=None, secret=None, secfile=None,
117
fqdn=None, timeout=None, interval=-1, checker=None):
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
118
229
self.name = name
230
logger.debug(u"Creating client %r", self.name)
119
231
# Uppercase and remove spaces from fingerprint
120
232
# for later comparison purposes with return value of
121
233
# the fingerprint() function
122
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
123
236
if secret:
124
237
self.secret = secret.decode(u"base64")
125
238
elif secfile:
127
240
self.secret = sf.read()
128
241
sf.close()
129
242
else:
130
raise RuntimeError(u"No secret or secfile for client %s"
131
% self.name)
132
self.fqdn = fqdn # string
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.fqdn = fqdn
133
246
self.created = datetime.datetime.now()
134
self.last_seen = None
135
if timeout is None:
136
self.timeout = options.timeout
137
else:
138
self.timeout = string_to_delta(timeout)
139
if interval == -1:
140
self.interval = options.interval
141
else:
142
self.interval = string_to_delta(interval)
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
143
250
self.stop_hook = stop_hook
144
251
self.checker = None
145
252
self.checker_initiator_tag = None
147
254
self.checker_callback_tag = None
148
255
self.check_command = checker
149
256
def start(self):
150
"""Start this clients checker and timeout hooks"""
257
"""Start this client's checker and timeout hooks"""
151
258
# Schedule a new checker to be started an 'interval' from now,
152
259
# and every interval from then on.
153
260
self.checker_initiator_tag = gobject.timeout_add\
161
268
self.stop)
162
269
def stop(self):
163
270
"""Stop this client.
164
The possibility that this client might be restarted is left
165
open, but not currently used."""
166
logger.debug(u"Stopping client %s", self.name)
167
self.secret = None
168
if self.stop_initiator_tag:
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
169
280
gobject.source_remove(self.stop_initiator_tag)
170
281
self.stop_initiator_tag = None
171
if self.checker_initiator_tag:
282
if getattr(self, "checker_initiator_tag", False):
172
283
gobject.source_remove(self.checker_initiator_tag)
173
284
self.checker_initiator_tag = None
174
285
self.stop_checker()
177
288
# Do not run this again if called by a gobject.timeout_add
178
289
return False
179
290
def __del__(self):
180
# Some code duplication here and in stop()
181
if hasattr(self, "stop_initiator_tag") \
182
and self.stop_initiator_tag:
183
gobject.source_remove(self.stop_initiator_tag)
184
self.stop_initiator_tag = None
185
if hasattr(self, "checker_initiator_tag") \
186
and self.checker_initiator_tag:
187
gobject.source_remove(self.checker_initiator_tag)
188
self.checker_initiator_tag = None
189
self.stop_checker()
291
self.stop_hook = None
292
self.stop()
190
293
def checker_callback(self, pid, condition):
191
294
"""The checker has completed, so take appropriate actions."""
192
295
now = datetime.datetime.now()
296
self.checker_callback_tag = None
297
self.checker = None
193
298
if os.WIFEXITED(condition) \
194
299
and (os.WEXITSTATUS(condition) == 0):
195
300
logger.debug(u"Checker for %(name)s succeeded",
196
301
vars(self))
197
self.last_seen = now
302
self.last_checked_ok = now
198
303
gobject.source_remove(self.stop_initiator_tag)
199
304
self.stop_initiator_tag = gobject.timeout_add\
200
305
(self._timeout_milliseconds,
205
310
else:
206
311
logger.debug(u"Checker for %(name)s failed",
207
312
vars(self))
208
self.checker = None
209
self.checker_callback_tag = None
210
313
def start_checker(self):
211
314
"""Start a new checker subprocess if one is not running.
212
315
If a checker already exists, leave it running and do
213
316
nothing."""
317
# The reason for not killing a running checker is that if we
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
322
# checkers alone, the checker would have to take more time
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
214
325
if self.checker is None:
215
326
try:
327
# In case check_command has exactly one % operator
216
328
command = self.check_command % self.fqdn
217
329
except TypeError:
330
# Escape attributes for the shell
218
331
escaped_attrs = dict((key, re.escape(str(val)))
219
332
for key, val in
220
333
vars(self).iteritems())
221
334
try:
222
335
command = self.check_command % escaped_attrs
223
336
except TypeError, error:
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
226
339
return True # Try again later
227
340
try:
228
341
logger.debug(u"Starting checker %r for %s",
229
342
command, self.name)
230
self.checker = subprocess.\
231
Popen(command,
232
close_fds=True, shell=True,
233
cwd="/")
343
self.checker = subprocess.Popen(command,
344
close_fds=True,
345
shell=True, cwd="/")
234
346
self.checker_callback_tag = gobject.child_watch_add\
235
347
(self.checker.pid,
236
348
self.checker_callback)
241
353
return True
242
354
def stop_checker(self):
243
355
"""Force the checker process, if any, to stop."""
244
if not hasattr(self, "checker") or self.checker is None:
356
if self.checker_callback_tag:
357
gobject.source_remove(self.checker_callback_tag)
358
self.checker_callback_tag = None
359
if getattr(self, "checker", None) is None:
245
360
return
246
gobject.source_remove(self.checker_callback_tag)
247
self.checker_callback_tag = None
248
os.kill(self.checker.pid, signal.SIGTERM)
249
if self.checker.poll() is None:
250
os.kill(self.checker.pid, signal.SIGKILL)
361
logger.debug("Stopping checker for %(name)s", vars(self))
362
try:
363
os.kill(self.checker.pid, signal.SIGTERM)
364
#os.sleep(0.5)
365
#if self.checker.poll() is None:
366
# os.kill(self.checker.pid, signal.SIGKILL)
367
except OSError, error:
368
if error.errno != errno.ESRCH: # No such process
369
raise
251
370
self.checker = None
252
def still_valid(self, now=None):
371
def still_valid(self):
253
372
"""Has the timeout not yet passed for this client?"""
254
if now is None:
255
now = datetime.datetime.now()
256
if self.last_seen is None:
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
257
375
return now < (self.created + self.timeout)
258
376
else:
259
return now < (self.last_seen + self.timeout)
377
return now < (self.last_checked_ok + self.timeout)
260
378
261
379
262
380
def peer_certificate(session):
263
"Return an OpenPGP data packet string for the peer's certificate"
381
"Return the peer's OpenPGP certificate as a bytestring"
264
382
# If not an OpenPGP certificate...
265
383
if gnutls.library.functions.gnutls_certificate_type_get\
266
384
(session._c_object) \
277
395
278
396
279
397
def fingerprint(openpgp):
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
281
399
# New empty GnuTLS certificate
282
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
283
401
gnutls.library.functions.gnutls_openpgp_crt_init\
315
433
def handle(self):
316
434
logger.debug(u"TCP connection from: %s",
317
435
unicode(self.client_address))
318
session = gnutls.connection.ClientSession(self.request,
319
gnutls.connection.\
320
X509Credentials())
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
321
442
322
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
323
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
324
445
# "+DHE-DSS"))
325
priority = "SECURE256"
326
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
327
450
gnutls.library.functions.gnutls_priority_set_direct\
328
451
(session._c_object, priority, None);
329
452
342
465
return
343
466
logger.debug(u"Fingerprint: %s", fpr)
344
467
client = None
345
for c in clients:
468
for c in self.server.clients:
346
469
if c.fingerprint == fpr:
347
470
client = c
348
471
break
472
if not client:
473
logger.debug(u"Client not found for fingerprint: %s", fpr)
474
session.bye()
475
return
349
476
# Have to check if client.still_valid(), since it is possible
350
477
# that the client timed out while establishing the GnuTLS
351
478
# session.
352
if (not client) or (not client.still_valid()):
353
if client:
354
logger.debug(u"Client %(name)s is invalid",
355
vars(client))
356
else:
357
logger.debug(u"Client not found for fingerprint: %s",
358
fpr)
479
if not client.still_valid():
480
logger.debug(u"Client %(name)s is invalid", vars(client))
359
481
session.bye()
360
482
return
361
483
sent_size = 0
371
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
372
494
"""IPv6 TCP server. Accepts 'None' as address and/or port.
373
495
Attributes:
374
options: Command line options
496
settings: Server settings
375
497
clients: Set() of Client objects
376
498
"""
377
499
address_family = socket.AF_INET6
378
500
def __init__(self, *args, **kwargs):
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
501
if "settings" in kwargs:
502
self.settings = kwargs["settings"]
503
del kwargs["settings"]
382
504
if "clients" in kwargs:
383
505
self.clients = kwargs["clients"]
384
506
del kwargs["clients"]
387
509
"""This overrides the normal server_bind() function
388
510
to bind to an interface if one was specified, and also NOT to
389
511
bind to an address or port if they were not specified."""
390
if self.options.interface:
391
if not hasattr(socket, "SO_BINDTODEVICE"):
392
# From /usr/include/asm-i486/socket.h
393
socket.SO_BINDTODEVICE = 25
512
if self.settings["interface"]:
513
# 25 is from /usr/include/asm-i486/socket.h
514
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
394
515
try:
395
516
self.socket.setsockopt(socket.SOL_SOCKET,
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
517
SO_BINDTODEVICE,
518
self.settings["interface"])
398
519
except socket.error, error:
399
520
if error[0] == errno.EPERM:
400
521
logger.warning(u"No permission to"
401
522
u" bind to interface %s",
402
self.options.interface)
523
self.settings["interface"])
403
524
else:
404
525
raise error
405
526
# Only bind(2) the socket if we really need to.
448
569
return delta
449
570
450
571
451
def add_service():
452
"""From the Avahi server example code"""
453
global group, serviceName, serviceType, servicePort, serviceTXT, \
454
domain, host
455
if group is None:
456
group = dbus.Interface(
457
bus.get_object( avahi.DBUS_NAME,
458
server.EntryGroupNew()),
459
avahi.DBUS_INTERFACE_ENTRY_GROUP)
460
group.connect_to_signal('StateChanged',
461
entry_group_state_changed)
462
logger.debug(u"Adding service '%s' of type '%s' ...",
463
serviceName, serviceType)
464
465
group.AddService(
466
serviceInterface, # interface
467
avahi.PROTO_INET6, # protocol
468
dbus.UInt32(0), # flags
469
serviceName, serviceType,
470
domain, host,
471
dbus.UInt16(servicePort),
472
avahi.string_array_to_txt_array(serviceTXT))
473
group.Commit()
474
475
476
def remove_service():
477
"""From the Avahi server example code"""
478
global group
479
480
if not group is None:
481
group.Reset()
482
483
484
572
def server_state_changed(state):
485
"""From the Avahi server example code"""
573
"""Derived from the Avahi example code"""
486
574
if state == avahi.SERVER_COLLISION:
487
575
logger.warning(u"Server name collision")
488
remove_service()
576
service.remove()
489
577
elif state == avahi.SERVER_RUNNING:
490
add_service()
578
service.add()
491
579
492
580
493
581
def entry_group_state_changed(state, error):
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
496
582
"""Derived from the Avahi example code"""
497
583
logger.debug(u"state change: %i", state)
498
584
499
585
if state == avahi.ENTRY_GROUP_ESTABLISHED:
500
586
logger.debug(u"Service established.")
501
587
elif state == avahi.ENTRY_GROUP_COLLISION:
502
503
rename_count = rename_count - 1
504
if rename_count > 0:
505
name = server.GetAlternativeServiceName(name)
506
logger.warning(u"Service name collision, "
507
u"changing name to '%s' ...", name)
508
remove_service()
509
add_service()
510
511
else:
512
logger.error(u"No suitable service name found after %i"
513
u" retries, exiting.", n_rename)
514
killme(1)
588
logger.warning(u"Service name collision.")
589
service.rename()
515
590
elif state == avahi.ENTRY_GROUP_FAILURE:
516
logger.error(u"Error in group state changed %s",
517
unicode(error))
518
killme(1)
519
520
521
def if_nametoindex(interface):
522
"""Call the C function if_nametoindex()"""
591
logger.critical(u"Error in group state changed %s",
592
unicode(error))
593
raise AvahiGroupError("State changed: %s", str(error))
594
595
def if_nametoindex(interface, _func=[None]):
596
"""Call the C function if_nametoindex(), or equivalent"""
597
if _func[0] is not None:
598
return _func[0](interface)
523
599
try:
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
600
if "ctypes.util" not in sys.modules:
601
import ctypes.util
602
while True:
603
try:
604
libc = ctypes.cdll.LoadLibrary\
605
(ctypes.util.find_library("c"))
606
_func[0] = libc.if_nametoindex
607
return _func[0](interface)
608
except IOError, e:
609
if e != errno.EINTR:
610
raise
526
611
except (OSError, AttributeError):
527
612
if "struct" not in sys.modules:
528
613
import struct
529
614
if "fcntl" not in sys.modules:
530
615
import fcntl
531
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
s = socket.socket()
533
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
534
struct.pack("16s16x", interface))
535
s.close()
536
interface_index = struct.unpack("I", ifreq[16:20])[0]
537
return interface_index
616
def the_hard_way(interface):
617
"Get an interface index the hard way, i.e. using fcntl()"
618
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
619
s = socket.socket()
620
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
621
struct.pack("16s16x", interface))
622
s.close()
623
interface_index = struct.unpack("I", ifreq[16:20])[0]
624
return interface_index
625
_func[0] = the_hard_way
626
return _func[0](interface)
538
627
539
628
540
629
def daemon(nochdir, noclose):
547
636
os.chdir("/")
548
637
if not noclose:
549
638
# Close all standard open file descriptors
550
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
639
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
551
640
if not stat.S_ISCHR(os.fstat(null).st_mode):
552
641
raise OSError(errno.ENODEV,
553
642
"/dev/null not a character device")
558
647
os.close(null)
559
648
560
649
561
def killme(status = 0):
562
logger.debug("Stopping server with exit status %d", status)
563
exitstatus = status
564
if main_loop_started:
565
main_loop.quit()
566
else:
567
sys.exit(status)
568
569
570
if __name__ == '__main__':
571
exitstatus = 0
650
def main():
651
global main_loop_started
572
652
main_loop_started = False
653
573
654
parser = OptionParser()
574
655
parser.add_option("-i", "--interface", type="string",
575
default=None, metavar="IF",
576
help="Bind to interface IF")
577
parser.add_option("-p", "--port", type="int", default=None,
656
metavar="IF", help="Bind to interface IF")
657
parser.add_option("-a", "--address", type="string",
658
help="Address to listen for requests on")
659
parser.add_option("-p", "--port", type="int",
578
660
help="Port number to receive requests on")
579
parser.add_option("--timeout", type="string", # Parsed later
580
default="1h",
581
help="Amount of downtime allowed for clients")
582
parser.add_option("--interval", type="string", # Parsed later
583
default="5m",
584
help="How often to check that a client is up")
585
661
parser.add_option("--check", action="store_true", default=False,
586
662
help="Run self-test")
587
663
parser.add_option("--debug", action="store_true", default=False,
588
help="Debug mode")
664
help="Debug mode; run in foreground and log to"
665
" terminal")
666
parser.add_option("--priority", type="string", help="GnuTLS"
667
" priority string (see GnuTLS documentation)")
668
parser.add_option("--servicename", type="string", metavar="NAME",
669
help="Zeroconf service name")
670
parser.add_option("--configdir", type="string",
671
default="/etc/mandos", metavar="DIR",
672
help="Directory to search for configuration"
673
" files")
589
674
(options, args) = parser.parse_args()
590
675
591
676
if options.check:
593
678
doctest.testmod()
594
679
sys.exit()
595
680
596
# Parse the time arguments
597
try:
598
options.timeout = string_to_delta(options.timeout)
599
except ValueError:
600
parser.error("option --timeout: Unparseable time")
601
try:
602
options.interval = string_to_delta(options.interval)
603
except ValueError:
604
parser.error("option --interval: Unparseable time")
605
606
# Parse config file
607
defaults = { "checker": "fping -q -- %%(fqdn)s" }
608
client_config = ConfigParser.SafeConfigParser(defaults)
609
#client_config.readfp(open("secrets.conf"), "secrets.conf")
610
client_config.read("mandos-clients.conf")
611
612
# From the Avahi server example code
681
# Default values for config file for server-global settings
682
server_defaults = { "interface": "",
683
"address": "",
684
"port": "",
685
"debug": "False",
686
"priority":
687
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
688
"servicename": "Mandos",
689
}
690
691
# Parse config file for server-global settings
692
server_config = ConfigParser.SafeConfigParser(server_defaults)
693
del server_defaults
694
server_config.read(os.path.join(options.configdir, "server.conf"))
695
server_section = "server"
696
# Convert the SafeConfigParser object to a dict
697
server_settings = dict(server_config.items(server_section))
698
# Use getboolean on the boolean config option
699
server_settings["debug"] = server_config.getboolean\
700
(server_section, "debug")
701
del server_config
702
703
# Override the settings from the config file with command line
704
# options, if set.
705
for option in ("interface", "address", "port", "debug",
706
"priority", "servicename", "configdir"):
707
value = getattr(options, option)
708
if value is not None:
709
server_settings[option] = value
710
del options
711
# Now we have our good server settings in "server_settings"
712
713
# Parse config file with clients
714
client_defaults = { "timeout": "1h",
715
"interval": "5m",
716
"checker": "fping -q -- %%(fqdn)s",
717
}
718
client_config = ConfigParser.SafeConfigParser(client_defaults)
719
client_config.read(os.path.join(server_settings["configdir"],
720
"clients.conf"))
721
722
global service
723
service = AvahiService(name = server_settings["servicename"],
724
type = "_mandos._tcp", );
725
if server_settings["interface"]:
726
service.interface = if_nametoindex(server_settings["interface"])
727
728
global main_loop
729
global bus
730
global server
731
# From the Avahi example code
613
732
DBusGMainLoop(set_as_default=True )
614
733
main_loop = gobject.MainLoop()
615
734
bus = dbus.SystemBus()
618
737
avahi.DBUS_INTERFACE_SERVER )
619
738
# End of Avahi example code
620
739
621
debug = options.debug
740
debug = server_settings["debug"]
622
741
623
742
if debug:
624
743
console = logging.StreamHandler()
633
752
clients.remove(client)
634
753
if not clients:
635
754
logger.debug(u"No clients left, exiting")
636
killme()
755
sys.exit()
637
756
638
clients.update(Set(Client(name=section, options=options,
757
clients.update(Set(Client(name=section,
639
758
stop_hook = remove_from_clients,
640
759
**(dict(client_config\
641
760
.items(section))))
647
766
def cleanup():
648
767
"Cleanup function; run on exit"
649
768
global group
650
# From the Avahi server example code
769
# From the Avahi example code
651
770
if not group is None:
652
771
group.Free()
653
772
group = None
654
773
# End of Avahi example code
655
774
656
for client in clients:
775
while clients:
776
client = clients.pop()
657
777
client.stop_hook = None
658
778
client.stop()
659
779
661
781
662
782
if not debug:
663
783
signal.signal(signal.SIGINT, signal.SIG_IGN)
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
784
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
785
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
666
786
667
787
for client in clients:
668
788
client.start()
669
789
670
tcp_server = IPv6_TCPServer((None, options.port),
790
tcp_server = IPv6_TCPServer((server_settings["address"],
791
server_settings["port"]),
671
792
tcp_handler,
672
options=options,
793
settings=server_settings,
673
794
clients=clients)
674
# Find out what random port we got
675
servicePort = tcp_server.socket.getsockname()[1]
676
logger.debug(u"Now listening on port %d", servicePort)
677
678
if options.interface is not None:
679
serviceInterface = if_nametoindex(options.interface)
680
681
# From the Avahi server example code
682
server.connect_to_signal("StateChanged", server_state_changed)
683
try:
684
server_state_changed(server.GetState())
685
except dbus.exceptions.DBusException, error:
686
logger.critical(u"DBusException: %s", error)
687
killme(1)
688
# End of Avahi example code
689
690
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
691
lambda *args, **kwargs:
692
tcp_server.handle_request(*args[2:],
693
**kwargs) or True)
694
try:
795
# Find out what port we got
796
service.port = tcp_server.socket.getsockname()[1]
797
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
798
u" scope_id %d" % tcp_server.socket.getsockname())
799
800
#service.interface = tcp_server.socket.getsockname()[3]
801
802
try:
803
# From the Avahi example code
804
server.connect_to_signal("StateChanged", server_state_changed)
805
try:
806
server_state_changed(server.GetState())
807
except dbus.exceptions.DBusException, error:
808
logger.critical(u"DBusException: %s", error)
809
sys.exit(1)
810
# End of Avahi example code
811
812
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
813
lambda *args, **kwargs:
814
tcp_server.handle_request\
815
(*args[2:], **kwargs) or True)
816
817
logger.debug("Starting main loop")
695
818
main_loop_started = True
696
819
main_loop.run()
820
except AvahiError, error:
821
logger.critical(u"AvahiError: %s" + unicode(error))
822
sys.exit(1)
697
823
except KeyboardInterrupt:
698
824
if debug:
699
825
print
700
701
sys.exit(exitstatus)
826
827
if __name__ == '__main__':
828
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0