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  • Committer: Teddy Hogeborn
  • Date: 2008-07-29 03:35:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080729033539-08zecoj3jwlkpjhw
* server.conf: New file.

* mandos-clients.conf: Renamed to clients.conf.

* Makefile (FORTIFY): New.
  (CFLAGS): Include $(FORTIFY).

* plugins.d/mandosclient.c (main): New "if_index" variable.  Bug fix:
                                   check if interface exists.  New
                                   "--connect" option.

* server.py (serviceInterface): Removed; replaced by
                                "AvahiService.interface".  All users
                                changed.
  (AvahiError, AvahiServiceError, AvahiGroupError): New exception
                                                    classes.
  (AvahiService): New class.
  (serviceName): Removed; replaced by "AvahiService.name".  All users
                 changed.
  (serviceType): Removed; replaced by "AvahiService.type".  All users
                 changed.
  (servicePort): Removed; replaced by "AvahiService.port".  All users
                 changed.
  (serviceTXT): Removed; replaced by "AvahiService.TXT".  All users
                changed.
  (domain): Removed; replaced by "AvahiService.domain".  All users
            changed.
  (host): Removed; replaced by "AvahiService.host".  All users
          changed.
  (rename_count): Removed; replaced by "AvahiService.rename_count" and
                 "AvahiService.max_renames".  All users changed.
  (Client.__init__): If no secret or secfile, raise TypeError instead
                     of RuntimeError.
  (Client.last_seen): Renamed to "Client.last_checked_ok".  All users
                      changed.
  (Client.stop, Client.stop_checker): Use "getattr" with default value
                                      instead of "hasattr".
  (Client.still_valid): Removed "now" argument.
  (Client.handle): Separate the "no client found" and "client invalid"
                   cases for clearer code.
  (IPv6_TCPServer.__init__): "options" argument replaced by
                             "settings".  All callers changed.
  (IPv6_TCPServer.options): Replaced by "IPv6_TCPServer.settings".
                            All users changed.
  (IPv6_TCPServer.server_bind): Use getattr instead of hasattr.
  (add_service): Removed; replaced by "AvahiService.add".  All callers
                 changed.
  (remove_service): Removed; replaced by "AvahiService.remove".  All
                    callers changed.
  (entry_group_state_changed): On entry group collision, call the new
                               AvahiService.rename method.  Raise
                               AvahiGroupError on group error.
  (if_nametoindex): Use ctypes.utils.find_library to locate the C
                    library.  Cache the result.  Loop on EINTR.
  (daemon): Use os.path.devnull to locate "/dev/null".
  (killme): Removed.  All callers changed to do "sys.exit()" instead,
            except where stated otherwise.
  (main): Removed "exitstatus".  Removed all default values from all
          non-bool options.  New option "--configdir".  New variables
          "server_defaults" and "server_settings", read from
          "%(configdir)s/server.conf".  Let any supplied command line
          options override server settings.   Variable "defaults"
          renamed to "client_defaults", which is read from
          "clients.conf" instead of "mandos-clients.conf".  New global
          AvahiService object "service" replaces old global variables.
          Catch AvahiError and exit with error if caught.

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Lines of Context:
server.py
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
9
# following functions: "AvahiService.add", "AvahiService.remove",
 
10
# "server_state_changed", "entry_group_state_changed", and some lines
 
11
# in "main".
12
12
# 
13
13
# Everything else is
14
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
61
61
from dbus.mainloop.glib import DBusGMainLoop
62
62
import ctypes
63
63
 
 
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.
 
74
 
64
75
 
65
76
logger = logging.Logger('mandos')
66
77
syslogger = logging.handlers.SysLogHandler\
67
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
68
 
             address = "/dev/log")
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
69
79
syslogger.setFormatter(logging.Formatter\
70
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
80
                        ('%(levelname)s: %(message)s'))
71
81
logger.addHandler(syslogger)
 
82
del syslogger
72
83
 
73
84
 
74
85
class AvahiError(Exception):
85
96
 
86
97
 
87
98
class AvahiService(object):
88
 
    """An Avahi (Zeroconf) service.
89
 
    Attributes:
 
99
    """
90
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
91
101
               Used to optionally bind to the specified interface.
92
 
    name: string; Example: 'Mandos'
93
 
    type: string; Example: '_mandos._tcp'.
94
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
95
 
    port: integer; what port to announce
96
 
    TXT: list of strings; TXT record for the service
97
 
    domain: string; Domain to publish on, default to .local if empty.
98
 
    host: string; Host to publish records for, default is localhost
99
 
    max_renames: integer; maximum number of renames
100
 
    rename_count: integer; counter so we only rename after collisions
101
 
                  a sensible number of times
 
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
102
113
    """
103
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
115
                 type = None, port = None, TXT = None, domain = "",
105
 
                 host = "", max_renames = 32768):
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
106
118
        self.interface = interface
107
119
        self.name = name
108
120
        self.type = type
121
133
                            u" retries, exiting.", rename_count)
122
134
            raise AvahiServiceError("Too many renames")
123
135
        name = server.GetAlternativeServiceName(name)
124
 
        logger.error(u"Changing name to %r ...", name)
125
 
        syslogger.setFormatter(logging.Formatter\
126
 
                               ('Mandos (%s): %%(levelname)s:'
127
 
                               ' %%(message)s' % name))
 
136
        logger.notice(u"Changing name to %r ...", name)
128
137
        self.remove()
129
138
        self.add()
130
139
        self.rename_count += 1
166
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
167
176
                 uniquely identify the client
168
177
    secret:    bytestring; sent verbatim (over TLS) to client
169
 
    host:      string; available for use by the checker command
 
178
    fqdn:      string (FQDN); available for use by the checker command
170
179
    created:   datetime.datetime(); object creation, not client host
171
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
172
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
212
221
    interval = property(lambda self: self._interval,
213
222
                        _set_interval)
214
223
    del _set_interval
215
 
    def __init__(self, name = None, stop_hook=None, config={}):
216
 
        """Note: the 'checker' key in 'config' sets the
217
 
        'checker_command' attribute and *not* the 'checker'
218
 
        attribute."""
 
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.."""
219
229
        self.name = name
220
230
        logger.debug(u"Creating client %r", self.name)
221
 
        # Uppercase and remove spaces from fingerprint for later
222
 
        # comparison purposes with return value from the fingerprint()
223
 
        # function
224
 
        self.fingerprint = config["fingerprint"].upper()\
225
 
                           .replace(u" ", u"")
 
231
        # Uppercase and remove spaces from fingerprint
 
232
        # for later comparison purposes with return value of
 
233
        # the fingerprint() function
 
234
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
226
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
227
 
        if "secret" in config:
228
 
            self.secret = config["secret"].decode(u"base64")
229
 
        elif "secfile" in config:
230
 
            sf = open(config["secfile"])
 
236
        if secret:
 
237
            self.secret = secret.decode(u"base64")
 
238
        elif secfile:
 
239
            sf = open(secfile)
231
240
            self.secret = sf.read()
232
241
            sf.close()
233
242
        else:
234
243
            raise TypeError(u"No secret or secfile for client %s"
235
244
                            % self.name)
236
 
        self.host = config.get("host", "")
 
245
        self.fqdn = fqdn
237
246
        self.created = datetime.datetime.now()
238
247
        self.last_checked_ok = None
239
 
        self.timeout = string_to_delta(config["timeout"])
240
 
        self.interval = string_to_delta(config["interval"])
 
248
        self.timeout = string_to_delta(timeout)
 
249
        self.interval = string_to_delta(interval)
241
250
        self.stop_hook = stop_hook
242
251
        self.checker = None
243
252
        self.checker_initiator_tag = None
244
253
        self.stop_initiator_tag = None
245
254
        self.checker_callback_tag = None
246
 
        self.check_command = config["checker"]
 
255
        self.check_command = checker
247
256
    def start(self):
248
257
        """Start this client's checker and timeout hooks"""
249
258
        # Schedule a new checker to be started an 'interval' from now,
262
271
        The possibility that a client might be restarted is left open,
263
272
        but not currently used."""
264
273
        # If this client doesn't have a secret, it is already stopped.
265
 
        if hasattr(self, "secret") and self.secret:
266
 
            logger.info(u"Stopping client %s", self.name)
 
274
        if self.secret:
 
275
            logger.debug(u"Stopping client %s", self.name)
267
276
            self.secret = None
268
277
        else:
269
278
            return False
288
297
        self.checker = None
289
298
        if os.WIFEXITED(condition) \
290
299
               and (os.WEXITSTATUS(condition) == 0):
291
 
            logger.info(u"Checker for %(name)s succeeded",
292
 
                        vars(self))
 
300
            logger.debug(u"Checker for %(name)s succeeded",
 
301
                         vars(self))
293
302
            self.last_checked_ok = now
294
303
            gobject.source_remove(self.stop_initiator_tag)
295
304
            self.stop_initiator_tag = gobject.timeout_add\
299
308
            logger.warning(u"Checker for %(name)s crashed?",
300
309
                           vars(self))
301
310
        else:
302
 
            logger.info(u"Checker for %(name)s failed",
303
 
                        vars(self))
 
311
            logger.debug(u"Checker for %(name)s failed",
 
312
                         vars(self))
304
313
    def start_checker(self):
305
314
        """Start a new checker subprocess if one is not running.
306
315
        If a checker already exists, leave it running and do
316
325
        if self.checker is None:
317
326
            try:
318
327
                # In case check_command has exactly one % operator
319
 
                command = self.check_command % self.host
 
328
                command = self.check_command % self.fqdn
320
329
            except TypeError:
321
330
                # Escape attributes for the shell
322
331
                escaped_attrs = dict((key, re.escape(str(val)))
329
338
                                 u' %s', self.check_command, error)
330
339
                    return True # Try again later
331
340
            try:
332
 
                logger.info(u"Starting checker %r for %s",
333
 
                            command, self.name)
 
341
                logger.debug(u"Starting checker %r for %s",
 
342
                             command, self.name)
334
343
                self.checker = subprocess.Popen(command,
335
344
                                                close_fds=True,
336
345
                                                shell=True, cwd="/")
349
358
            self.checker_callback_tag = None
350
359
        if getattr(self, "checker", None) is None:
351
360
            return
352
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
361
        logger.debug("Stopping checker for %(name)s", vars(self))
353
362
        try:
354
363
            os.kill(self.checker.pid, signal.SIGTERM)
355
364
            #os.sleep(0.5)
387
396
 
388
397
def fingerprint(openpgp):
389
398
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
399
    # New empty GnuTLS certificate
 
400
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
401
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
402
        (ctypes.byref(crt))
390
403
    # New GnuTLS "datum" with the OpenPGP public key
391
404
    datum = gnutls.library.types.gnutls_datum_t\
392
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
393
406
                     ctypes.POINTER(ctypes.c_ubyte)),
394
407
         ctypes.c_uint(len(openpgp)))
395
 
    # New empty GnuTLS certificate
396
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
398
 
        (ctypes.byref(crt))
399
408
    # Import the OpenPGP public key into the certificate
400
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
401
 
                    (crt, ctypes.byref(datum),
402
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
409
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
410
        (crt,
 
411
         ctypes.byref(datum),
 
412
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
403
413
    # New buffer for the fingerprint
404
414
    buffer = ctypes.create_string_buffer(20)
405
415
    buffer_length = ctypes.c_size_t()
421
431
    Note: This will run in its own forked process."""
422
432
    
423
433
    def handle(self):
424
 
        logger.info(u"TCP connection from: %s",
 
434
        logger.debug(u"TCP connection from: %s",
425
435
                     unicode(self.client_address))
426
436
        session = gnutls.connection.ClientSession\
427
437
                  (self.request, gnutls.connection.X509Credentials())
428
 
        
429
 
        line = self.request.makefile().readline()
430
 
        logger.debug(u"Protocol version: %r", line)
431
 
        try:
432
 
            if int(line.strip().split()[0]) > 1:
433
 
                raise RuntimeError
434
 
        except (ValueError, IndexError, RuntimeError), error:
435
 
            logger.error(u"Unknown protocol version: %s", error)
436
 
            return
437
 
        
438
438
        # Note: gnutls.connection.X509Credentials is really a generic
439
439
        # GnuTLS certificate credentials object so long as no X.509
440
440
        # keys are added to it.  Therefore, we can use it here despite
453
453
        try:
454
454
            session.handshake()
455
455
        except gnutls.errors.GNUTLSError, error:
456
 
            logger.warning(u"Handshake failed: %s", error)
 
456
            logger.debug(u"Handshake failed: %s", error)
457
457
            # Do not run session.bye() here: the session is not
458
458
            # established.  Just abandon the request.
459
459
            return
460
460
        try:
461
461
            fpr = fingerprint(peer_certificate(session))
462
462
        except (TypeError, gnutls.errors.GNUTLSError), error:
463
 
            logger.warning(u"Bad certificate: %s", error)
 
463
            logger.debug(u"Bad certificate: %s", error)
464
464
            session.bye()
465
465
            return
466
466
        logger.debug(u"Fingerprint: %s", fpr)
470
470
                client = c
471
471
                break
472
472
        if not client:
473
 
            logger.warning(u"Client not found for fingerprint: %s",
474
 
                           fpr)
 
473
            logger.debug(u"Client not found for fingerprint: %s", fpr)
475
474
            session.bye()
476
475
            return
477
476
        # Have to check if client.still_valid(), since it is possible
478
477
        # that the client timed out while establishing the GnuTLS
479
478
        # session.
480
479
        if not client.still_valid():
481
 
            logger.warning(u"Client %(name)s is invalid",
482
 
                           vars(client))
 
480
            logger.debug(u"Client %(name)s is invalid", vars(client))
483
481
            session.bye()
484
482
            return
485
483
        sent_size = 0
511
509
        """This overrides the normal server_bind() function
512
510
        to bind to an interface if one was specified, and also NOT to
513
511
        bind to an address or port if they were not specified."""
514
 
        if self.settings["interface"]:
 
512
        if self.settings["interface"] != avahi.IF_UNSPEC:
515
513
            # 25 is from /usr/include/asm-i486/socket.h
516
514
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
517
515
            try:
520
518
                                       self.settings["interface"])
521
519
            except socket.error, error:
522
520
                if error[0] == errno.EPERM:
523
 
                    logger.error(u"No permission to"
524
 
                                 u" bind to interface %s",
525
 
                                 self.settings["interface"])
 
521
                    logger.warning(u"No permission to"
 
522
                                   u" bind to interface %s",
 
523
                                   self.settings["interface"])
526
524
                else:
527
525
                    raise error
528
526
        # Only bind(2) the socket if we really need to.
531
529
                in6addr_any = "::"
532
530
                self.server_address = (in6addr_any,
533
531
                                       self.server_address[1])
534
 
            elif not self.server_address[1]:
 
532
            elif self.server_address[1] is None:
535
533
                self.server_address = (self.server_address[0],
536
534
                                       0)
537
 
#                 if self.settings["interface"]:
538
 
#                     self.server_address = (self.server_address[0],
539
 
#                                            0, # port
540
 
#                                            0, # flowinfo
541
 
#                                            if_nametoindex
542
 
#                                            (self.settings
543
 
#                                             ["interface"]))
544
535
            return super(type(self), self).server_bind()
545
536
 
546
537
 
581
572
def server_state_changed(state):
582
573
    """Derived from the Avahi example code"""
583
574
    if state == avahi.SERVER_COLLISION:
584
 
        logger.error(u"Server name collision")
 
575
        logger.warning(u"Server name collision")
585
576
        service.remove()
586
577
    elif state == avahi.SERVER_RUNNING:
587
578
        service.add()
601
592
                        unicode(error))
602
593
        raise AvahiGroupError("State changed: %s", str(error))
603
594
 
604
 
def if_nametoindex(interface):
 
595
def if_nametoindex(interface, _func=[None]):
605
596
    """Call the C function if_nametoindex(), or equivalent"""
606
 
    global if_nametoindex
 
597
    if _func[0] is not None:
 
598
        return _func[0](interface)
607
599
    try:
608
600
        if "ctypes.util" not in sys.modules:
609
601
            import ctypes.util
610
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
611
 
            (ctypes.util.find_library("c")).if_nametoindex
 
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
612
611
    except (OSError, AttributeError):
613
612
        if "struct" not in sys.modules:
614
613
            import struct
615
614
        if "fcntl" not in sys.modules:
616
615
            import fcntl
617
 
        def if_nametoindex(interface):
 
616
        def the_hard_way(interface):
618
617
            "Get an interface index the hard way, i.e. using fcntl()"
619
618
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
620
619
            s = socket.socket()
623
622
            s.close()
624
623
            interface_index = struct.unpack("I", ifreq[16:20])[0]
625
624
            return interface_index
626
 
    return if_nametoindex(interface)
627
 
 
628
 
 
629
 
def daemon(nochdir = False, noclose = False):
 
625
        _func[0] = the_hard_way
 
626
        return _func[0](interface)
 
627
 
 
628
 
 
629
def daemon(nochdir, noclose):
630
630
    """See daemon(3).  Standard BSD Unix function.
631
631
    This should really exist as os.daemon, but it doesn't (yet)."""
632
632
    if os.fork():
634
634
    os.setsid()
635
635
    if not nochdir:
636
636
        os.chdir("/")
637
 
    if os.fork():
638
 
        sys.exit()
639
637
    if not noclose:
640
638
        # Close all standard open file descriptors
641
639
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
662
660
                      help="Port number to receive requests on")
663
661
    parser.add_option("--check", action="store_true", default=False,
664
662
                      help="Run self-test")
665
 
    parser.add_option("--debug", action="store_true",
 
663
    parser.add_option("--debug", action="store_true", default=False,
666
664
                      help="Debug mode; run in foreground and log to"
667
665
                      " terminal")
668
666
    parser.add_option("--priority", type="string", help="GnuTLS"
693
691
    # Parse config file for server-global settings
694
692
    server_config = ConfigParser.SafeConfigParser(server_defaults)
695
693
    del server_defaults
696
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
694
    server_config.read(os.path.join(options.configdir, "server.conf"))
697
695
    server_section = "server"
698
696
    # Convert the SafeConfigParser object to a dict
699
697
    server_settings = dict(server_config.items(server_section))
701
699
    server_settings["debug"] = server_config.getboolean\
702
700
                               (server_section, "debug")
703
701
    del server_config
 
702
    if not server_settings["interface"]:
 
703
        server_settings["interface"] = avahi.IF_UNSPEC
704
704
    
705
705
    # Override the settings from the config file with command line
706
706
    # options, if set.
712
712
    del options
713
713
    # Now we have our good server settings in "server_settings"
714
714
    
715
 
    debug = server_settings["debug"]
716
 
    
717
 
    if not debug:
718
 
        syslogger.setLevel(logging.WARNING)
719
 
    
720
 
    if server_settings["servicename"] != "Mandos":
721
 
        syslogger.setFormatter(logging.Formatter\
722
 
                               ('Mandos (%s): %%(levelname)s:'
723
 
                                ' %%(message)s'
724
 
                                % server_settings["servicename"]))
725
 
    
726
715
    # Parse config file with clients
727
716
    client_defaults = { "timeout": "1h",
728
717
                        "interval": "5m",
729
 
                        "checker": "fping -q -- %%(host)s",
 
718
                        "checker": "fping -q -- %%(fqdn)s",
730
719
                        }
731
720
    client_config = ConfigParser.SafeConfigParser(client_defaults)
732
721
    client_config.read(os.path.join(server_settings["configdir"],
735
724
    global service
736
725
    service = AvahiService(name = server_settings["servicename"],
737
726
                           type = "_mandos._tcp", );
738
 
    if server_settings["interface"]:
739
 
        service.interface = if_nametoindex(server_settings["interface"])
740
727
    
741
728
    global main_loop
742
729
    global bus
750
737
            avahi.DBUS_INTERFACE_SERVER )
751
738
    # End of Avahi example code
752
739
    
 
740
    debug = server_settings["debug"]
 
741
    
753
742
    if debug:
754
743
        console = logging.StreamHandler()
755
744
        # console.setLevel(logging.DEBUG)
762
751
    def remove_from_clients(client):
763
752
        clients.remove(client)
764
753
        if not clients:
765
 
            logger.critical(u"No clients left, exiting")
 
754
            logger.debug(u"No clients left, exiting")
766
755
            sys.exit()
767
756
    
768
 
    clients.update(Set(Client(name = section,
 
757
    clients.update(Set(Client(name=section,
769
758
                              stop_hook = remove_from_clients,
770
 
                              config
771
 
                              = dict(client_config.items(section)))
 
759
                              **(dict(client_config\
 
760
                                      .items(section))))
772
761
                       for section in client_config.sections()))
773
 
    if not clients:
774
 
        logger.critical(u"No clients defined")
775
 
        sys.exit(1)
776
762
    
777
763
    if not debug:
778
 
        daemon()
779
 
    
780
 
    pidfilename = "/var/run/mandos/mandos.pid"
781
 
    pid = os.getpid()
782
 
    try:
783
 
        pidfile = open(pidfilename, "w")
784
 
        pidfile.write(str(pid) + "\n")
785
 
        pidfile.close()
786
 
        del pidfile
787
 
    except IOError, err:
788
 
        logger.error(u"Could not write %s file with PID %d",
789
 
                     pidfilename, os.getpid())
 
764
        daemon(False, False)
790
765
    
791
766
    def cleanup():
792
767
        "Cleanup function; run on exit"
819
794
                                clients=clients)
820
795
    # Find out what port we got
821
796
    service.port = tcp_server.socket.getsockname()[1]
822
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
797
    logger.debug(u"Now listening on port %d", service.port)
824
798
    
825
 
    #service.interface = tcp_server.socket.getsockname()[3]
 
799
    if not server_settings["interface"]:
 
800
        service.interface = if_nametoindex\
 
801
                            (server_settings["interface"])
826
802
    
827
803
    try:
828
804
        # From the Avahi example code
839
815
                             tcp_server.handle_request\
840
816
                             (*args[2:], **kwargs) or True)
841
817
        
842
 
        logger.debug(u"Starting main loop")
 
818
        logger.debug("Starting main loop")
843
819
        main_loop_started = True
844
820
        main_loop.run()
845
821
    except AvahiError, error: