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- Committer: Björn Påhlsson
- Date: 2008-08-03 17:24:47 UTC
- mfrom: (40 mandos)
- 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-20080803172447-uma248p1s4cbsp02
merge +
mandosclient
Added a adjustbuffer function.
mandosclient
Added a adjustbuffer function.
- files added:
- server.conf
- files removed:
- plugins.d/Makefile
- files renamed:
- mandos-clients.conf => clients.conf
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- 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",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
#
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
15
#
16
# 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.
20
#
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
#
2
31
3
32
from __future__ import division
4
33
21
50
import signal
22
51
from sets import Set
23
52
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
24
57
25
58
import dbus
26
59
import gobject
28
61
from dbus.mainloop.glib import DBusGMainLoop
29
62
import ctypes
30
63
31
import logging
32
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
68
# 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
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# 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
73
# authentication or authorization is done by this server.
33
74
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
35
75
36
76
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
83
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.
101
Used to optionally bind to the specified interface.
102
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.
110
max_renames = integer; maximum number of renames
111
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)
137
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
53
168
# End of Avahi example code
54
169
55
170
61
176
uniquely identify the client
62
177
secret: bytestring; sent verbatim (over TLS) to client
63
178
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
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
68
183
interval: datetime.timedelta(); How often to start a new checker
69
184
stop_hook: If set, called by stop() as stop_hook(self)
70
185
checker: subprocess.Popen(); a running checker process used
71
186
to see if the client lives.
72
Is None if no process is running.
187
'None' if no process is running.
73
188
checker_initiator_tag: a gobject event source tag, or None
74
189
stop_initiator_tag: - '' -
75
190
checker_callback_tag: - '' -
76
191
checker_command: string; External command which is run to check if
77
client lives. %()s expansions are done at
192
client lives. %() expansions are done at
78
193
runtime with vars(self) as dict, so that for
79
194
instance %(name)s can be used in the command.
80
195
Private attibutes:
81
196
_timeout: Real variable for 'timeout'
82
197
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
84
199
_interval_milliseconds: - '' -
85
200
"""
86
201
def _set_timeout(self, timeout):
106
221
interval = property(lambda self: self._interval,
107
222
_set_interval)
108
223
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
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.."""
112
229
self.name = name
230
logger.debug(u"Creating client %r", self.name)
113
231
# Uppercase and remove spaces from fingerprint
114
232
# for later comparison purposes with return value of
115
233
# the fingerprint() function
116
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
117
236
if secret:
118
237
self.secret = secret.decode(u"base64")
119
238
elif secfile:
121
240
self.secret = sf.read()
122
241
sf.close()
123
242
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.fqdn = fqdn
127
246
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
137
250
self.stop_hook = stop_hook
138
251
self.checker = None
139
252
self.checker_initiator_tag = None
141
254
self.checker_callback_tag = None
142
255
self.check_command = checker
143
256
def start(self):
144
"""Start this clients checker and timeout hooks"""
257
"""Start this client's checker and timeout hooks"""
145
258
# Schedule a new checker to be started an 'interval' from now,
146
259
# and every interval from then on.
147
260
self.checker_initiator_tag = gobject.timeout_add\
155
268
self.stop)
156
269
def stop(self):
157
270
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
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):
163
280
gobject.source_remove(self.stop_initiator_tag)
164
281
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
282
if getattr(self, "checker_initiator_tag", False):
166
283
gobject.source_remove(self.checker_initiator_tag)
167
284
self.checker_initiator_tag = None
168
285
self.stop_checker()
171
288
# Do not run this again if called by a gobject.timeout_add
172
289
return False
173
290
def __del__(self):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
291
self.stop_hook = None
292
self.stop()
184
293
def checker_callback(self, pid, condition):
185
294
"""The checker has completed, so take appropriate actions."""
186
295
now = datetime.datetime.now()
296
self.checker_callback_tag = None
297
self.checker = None
187
298
if os.WIFEXITED(condition) \
188
299
and (os.WEXITSTATUS(condition) == 0):
189
300
logger.debug(u"Checker for %(name)s succeeded",
190
301
vars(self))
191
self.last_seen = now
302
self.last_checked_ok = now
192
303
gobject.source_remove(self.stop_initiator_tag)
193
304
self.stop_initiator_tag = gobject.timeout_add\
194
305
(self._timeout_milliseconds,
195
306
self.stop)
196
if not os.WIFEXITED(condition):
307
elif not os.WIFEXITED(condition):
197
308
logger.warning(u"Checker for %(name)s crashed?",
198
309
vars(self))
199
310
else:
200
311
logger.debug(u"Checker for %(name)s failed",
201
312
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
204
313
def start_checker(self):
205
314
"""Start a new checker subprocess if one is not running.
206
315
If a checker already exists, leave it running and do
207
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.
208
325
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
211
326
try:
327
# In case check_command has exactly one % operator
212
328
command = self.check_command % self.fqdn
213
329
except TypeError:
330
# Escape attributes for the shell
214
331
escaped_attrs = dict((key, re.escape(str(val)))
215
332
for key, val in
216
333
vars(self).iteritems())
217
334
try:
218
335
command = self.check_command % escaped_attrs
219
336
except TypeError, error:
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
222
339
return True # Try again later
223
340
try:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
343
self.checker = subprocess.Popen(command,
344
close_fds=True,
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
233
349
except subprocess.OSError, error:
234
350
logger.error(u"Failed to start subprocess: %s",
235
351
error)
237
353
return True
238
354
def stop_checker(self):
239
355
"""Force the checker process, if any, to stop."""
240
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:
241
360
return
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
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
247
370
self.checker = None
248
def still_valid(self, now=None):
371
def still_valid(self):
249
372
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
253
375
return now < (self.created + self.timeout)
254
376
else:
255
return now < (self.last_seen + self.timeout)
377
return now < (self.last_checked_ok + self.timeout)
256
378
257
379
258
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
259
382
# If not an OpenPGP certificate...
260
383
if gnutls.library.functions.gnutls_certificate_type_get\
261
384
(session._c_object) \
272
395
273
396
274
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
275
399
# New empty GnuTLS certificate
276
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
401
gnutls.library.functions.gnutls_openpgp_crt_init\
309
433
def handle(self):
310
434
logger.debug(u"TCP connection from: %s",
311
435
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
436
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
439
try:
440
if int(line.strip().split()[0]) > 1:
441
raise RuntimeError
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
444
return
445
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
315
452
316
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
455
# "+DHE-DSS"))
319
priority = "SECURE256"
320
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
321
460
gnutls.library.functions.gnutls_priority_set_direct\
322
461
(session._c_object, priority, None);
323
462
336
475
return
337
476
logger.debug(u"Fingerprint: %s", fpr)
338
477
client = None
339
for c in clients:
478
for c in self.server.clients:
340
479
if c.fingerprint == fpr:
341
480
client = c
342
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
343
486
# Have to check if client.still_valid(), since it is possible
344
487
# that the client timed out while establishing the GnuTLS
345
488
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
353
491
session.bye()
354
492
return
355
493
sent_size = 0
365
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
367
505
Attributes:
368
options: Command line options
506
settings: Server settings
369
507
clients: Set() of Client objects
370
508
"""
371
509
address_family = socket.AF_INET6
372
510
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
376
514
if "clients" in kwargs:
377
515
self.clients = kwargs["clients"]
378
516
del kwargs["clients"]
381
519
"""This overrides the normal server_bind() function
382
520
to bind to an interface if one was specified, and also NOT to
383
521
bind to an address or port if they were not specified."""
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
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
388
525
try:
389
526
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
527
SO_BINDTODEVICE,
528
self.settings["interface"])
392
529
except socket.error, error:
393
530
if error[0] == errno.EPERM:
394
531
logger.warning(u"No permission to"
395
532
u" bind to interface %s",
396
self.options.interface)
533
self.settings["interface"])
397
534
else:
398
535
raise error
399
536
# Only bind(2) the socket if we really need to.
442
579
return delta
443
580
444
581
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
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)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
476
477
478
582
def server_state_changed(state):
479
"""From the Avahi server example code"""
583
"""Derived from the Avahi example code"""
480
584
if state == avahi.SERVER_COLLISION:
481
585
logger.warning(u"Server name collision")
482
remove_service()
586
service.remove()
483
587
elif state == avahi.SERVER_RUNNING:
484
add_service()
588
service.add()
485
589
486
590
487
591
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
592
"""Derived from the Avahi example code"""
491
593
logger.debug(u"state change: %i", state)
492
594
493
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
596
logger.debug(u"Service established.")
495
597
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
598
logger.warning(u"Service name collision.")
599
service.rename()
510
600
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
516
517
def if_nametoindex(interface):
518
"""Call the C function if_nametoindex()"""
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface, _func=[None]):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
if _func[0] is not None:
608
return _func[0](interface)
519
609
try:
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
610
if "ctypes.util" not in sys.modules:
611
import ctypes.util
612
while True:
613
try:
614
libc = ctypes.cdll.LoadLibrary\
615
(ctypes.util.find_library("c"))
616
_func[0] = libc.if_nametoindex
617
return _func[0](interface)
618
except IOError, e:
619
if e != errno.EINTR:
620
raise
522
621
except (OSError, AttributeError):
523
622
if "struct" not in sys.modules:
524
623
import struct
525
624
if "fcntl" not in sys.modules:
526
625
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
626
def the_hard_way(interface):
627
"Get an interface index the hard way, i.e. using fcntl()"
628
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
629
s = socket.socket()
630
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
631
struct.pack("16s16x", interface))
632
s.close()
633
interface_index = struct.unpack("I", ifreq[16:20])[0]
634
return interface_index
635
_func[0] = the_hard_way
636
return _func[0](interface)
637
638
639
def daemon(nochdir, noclose):
640
"""See daemon(3). Standard BSD Unix function.
641
This should really exist as os.daemon, but it doesn't (yet)."""
642
if os.fork():
643
sys.exit()
644
os.setsid()
645
if not nochdir:
646
os.chdir("/")
647
if not noclose:
648
# Close all standard open file descriptors
649
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
650
if not stat.S_ISCHR(os.fstat(null).st_mode):
651
raise OSError(errno.ENODEV,
652
"/dev/null not a character device")
653
os.dup2(null, sys.stdin.fileno())
654
os.dup2(null, sys.stdout.fileno())
655
os.dup2(null, sys.stderr.fileno())
656
if null > 2:
657
os.close(null)
658
659
660
def main():
661
global main_loop_started
662
main_loop_started = False
663
537
664
parser = OptionParser()
538
665
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
666
metavar="IF", help="Bind to interface IF")
667
parser.add_option("-a", "--address", type="string",
668
help="Address to listen for requests on")
669
parser.add_option("-p", "--port", type="int",
554
670
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
671
parser.add_option("--check", action="store_true", default=False,
562
672
help="Run self-test")
563
673
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
674
help="Debug mode; run in foreground and log to"
675
" terminal")
676
parser.add_option("--priority", type="string", help="GnuTLS"
677
" priority string (see GnuTLS documentation)")
678
parser.add_option("--servicename", type="string", metavar="NAME",
679
help="Zeroconf service name")
680
parser.add_option("--configdir", type="string",
681
default="/etc/mandos", metavar="DIR",
682
help="Directory to search for configuration"
683
" files")
565
684
(options, args) = parser.parse_args()
566
685
567
686
if options.check:
569
688
doctest.testmod()
570
689
sys.exit()
571
690
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
691
# Default values for config file for server-global settings
692
server_defaults = { "interface": "",
693
"address": "",
694
"port": "",
695
"debug": "False",
696
"priority":
697
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
698
"servicename": "Mandos",
699
}
700
701
# Parse config file for server-global settings
702
server_config = ConfigParser.SafeConfigParser(server_defaults)
703
del server_defaults
704
server_config.read(os.path.join(options.configdir, "server.conf"))
705
server_section = "server"
706
# Convert the SafeConfigParser object to a dict
707
server_settings = dict(server_config.items(server_section))
708
# Use getboolean on the boolean config option
709
server_settings["debug"] = server_config.getboolean\
710
(server_section, "debug")
711
del server_config
712
713
# Override the settings from the config file with command line
714
# options, if set.
715
for option in ("interface", "address", "port", "debug",
716
"priority", "servicename", "configdir"):
717
value = getattr(options, option)
718
if value is not None:
719
server_settings[option] = value
720
del options
721
# Now we have our good server settings in "server_settings"
722
723
# Parse config file with clients
724
client_defaults = { "timeout": "1h",
725
"interval": "5m",
726
"checker": "fping -q -- %%(fqdn)s",
727
}
728
client_config = ConfigParser.SafeConfigParser(client_defaults)
729
client_config.read(os.path.join(server_settings["configdir"],
730
"clients.conf"))
731
732
global service
733
service = AvahiService(name = server_settings["servicename"],
734
type = "_mandos._tcp", );
735
if server_settings["interface"]:
736
service.interface = if_nametoindex(server_settings["interface"])
737
738
global main_loop
739
global bus
740
global server
741
# From the Avahi example code
589
742
DBusGMainLoop(set_as_default=True )
590
743
main_loop = gobject.MainLoop()
591
744
bus = dbus.SystemBus()
594
747
avahi.DBUS_INTERFACE_SERVER )
595
748
# End of Avahi example code
596
749
597
debug = options.debug
750
debug = server_settings["debug"]
751
752
if debug:
753
console = logging.StreamHandler()
754
# console.setLevel(logging.DEBUG)
755
console.setFormatter(logging.Formatter\
756
('%(levelname)s: %(message)s'))
757
logger.addHandler(console)
758
del console
598
759
599
760
clients = Set()
600
761
def remove_from_clients(client):
601
762
clients.remove(client)
602
763
if not clients:
603
764
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
765
sys.exit()
605
766
606
clients.update(Set(Client(name=section, options=options,
767
clients.update(Set(Client(name=section,
607
768
stop_hook = remove_from_clients,
608
769
**(dict(client_config\
609
770
.items(section))))
610
771
for section in client_config.sections()))
772
773
if not debug:
774
daemon(False, False)
775
776
def cleanup():
777
"Cleanup function; run on exit"
778
global group
779
# From the Avahi example code
780
if not group is None:
781
group.Free()
782
group = None
783
# End of Avahi example code
784
785
while clients:
786
client = clients.pop()
787
client.stop_hook = None
788
client.stop()
789
790
atexit.register(cleanup)
791
792
if not debug:
793
signal.signal(signal.SIGINT, signal.SIG_IGN)
794
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
795
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
796
611
797
for client in clients:
612
798
client.start()
613
799
614
tcp_server = IPv6_TCPServer((None, options.port),
800
tcp_server = IPv6_TCPServer((server_settings["address"],
801
server_settings["port"]),
615
802
tcp_handler,
616
options=options,
803
settings=server_settings,
617
804
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
805
# Find out what port we got
806
service.port = tcp_server.socket.getsockname()[1]
807
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
808
u" scope_id %d" % tcp_server.socket.getsockname())
809
810
#service.interface = tcp_server.socket.getsockname()[3]
811
634
812
try:
813
# From the Avahi example code
814
server.connect_to_signal("StateChanged", server_state_changed)
815
try:
816
server_state_changed(server.GetState())
817
except dbus.exceptions.DBusException, error:
818
logger.critical(u"DBusException: %s", error)
819
sys.exit(1)
820
# End of Avahi example code
821
822
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
823
lambda *args, **kwargs:
824
tcp_server.handle_request\
825
(*args[2:], **kwargs) or True)
826
827
logger.debug("Starting main loop")
828
main_loop_started = True
635
829
main_loop.run()
830
except AvahiError, error:
831
logger.critical(u"AvahiError: %s" + unicode(error))
832
sys.exit(1)
636
833
except KeyboardInterrupt:
637
print
638
639
# Cleanup here
834
if debug:
835
print
640
836
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
837
if __name__ == '__main__':
838
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0