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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
 
version = "1.0"
 
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
 
65
75
 
66
76
logger = logging.Logger('mandos')
67
77
syslogger = logging.handlers.SysLogHandler\
68
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
 
             address = "/dev/log")
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
79
syslogger.setFormatter(logging.Formatter\
71
 
                        ('Mandos: %(levelname)s: %(message)s'))
 
80
                        ('%(levelname)s: %(message)s'))
72
81
logger.addHandler(syslogger)
 
82
del syslogger
73
83
 
74
 
console = logging.StreamHandler()
75
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
 
                                       ' %(message)s'))
77
 
logger.addHandler(console)
78
84
 
79
85
class AvahiError(Exception):
80
86
    def __init__(self, value):
90
96
 
91
97
 
92
98
class AvahiService(object):
93
 
    """An Avahi (Zeroconf) service.
94
 
    Attributes:
 
99
    """
95
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
96
101
               Used to optionally bind to the specified interface.
97
 
    name: string; Example: 'Mandos'
98
 
    type: string; Example: '_mandos._tcp'.
99
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
100
 
    port: integer; what port to announce
101
 
    TXT: list of strings; TXT record for the service
102
 
    domain: string; Domain to publish on, default to .local if empty.
103
 
    host: string; Host to publish records for, default is localhost
104
 
    max_renames: integer; maximum number of renames
105
 
    rename_count: integer; counter so we only rename after collisions
106
 
                  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
107
113
    """
108
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
115
                 type = None, port = None, TXT = None, domain = "",
110
 
                 host = "", max_renames = 32768):
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
111
118
        self.interface = interface
112
119
        self.name = name
113
120
        self.type = type
119
126
        self.domain = domain
120
127
        self.host = host
121
128
        self.rename_count = 0
122
 
        self.max_renames = max_renames
123
129
    def rename(self):
124
130
        """Derived from the Avahi example code"""
125
131
        if self.rename_count >= self.max_renames:
126
132
            logger.critical(u"No suitable service name found after %i"
127
133
                            u" retries, exiting.", rename_count)
128
134
            raise AvahiServiceError("Too many renames")
129
 
        self.name = server.GetAlternativeServiceName(self.name)
130
 
        logger.info(u"Changing name to %r ...", str(self.name))
131
 
        syslogger.setFormatter(logging.Formatter\
132
 
                               ('Mandos (%s): %%(levelname)s:'
133
 
                               ' %%(message)s' % self.name))
 
135
        name = server.GetAlternativeServiceName(name)
 
136
        logger.notice(u"Changing name to %r ...", name)
134
137
        self.remove()
135
138
        self.add()
136
139
        self.rename_count += 1
172
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
173
176
                 uniquely identify the client
174
177
    secret:    bytestring; sent verbatim (over TLS) to client
175
 
    host:      string; available for use by the checker command
 
178
    fqdn:      string (FQDN); available for use by the checker command
176
179
    created:   datetime.datetime(); object creation, not client host
177
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
178
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
218
221
    interval = property(lambda self: self._interval,
219
222
                        _set_interval)
220
223
    del _set_interval
221
 
    def __init__(self, name = None, stop_hook=None, config={}):
222
 
        """Note: the 'checker' key in 'config' sets the
223
 
        'checker_command' attribute and *not* the 'checker'
224
 
        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.."""
225
229
        self.name = name
226
230
        logger.debug(u"Creating client %r", self.name)
227
 
        # Uppercase and remove spaces from fingerprint for later
228
 
        # comparison purposes with return value from the fingerprint()
229
 
        # function
230
 
        self.fingerprint = config["fingerprint"].upper()\
231
 
                           .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"")
232
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
233
 
        if "secret" in config:
234
 
            self.secret = config["secret"].decode(u"base64")
235
 
        elif "secfile" in config:
236
 
            sf = open(config["secfile"])
 
236
        if secret:
 
237
            self.secret = secret.decode(u"base64")
 
238
        elif secfile:
 
239
            sf = open(secfile)
237
240
            self.secret = sf.read()
238
241
            sf.close()
239
242
        else:
240
243
            raise TypeError(u"No secret or secfile for client %s"
241
244
                            % self.name)
242
 
        self.host = config.get("host", "")
 
245
        self.fqdn = fqdn
243
246
        self.created = datetime.datetime.now()
244
247
        self.last_checked_ok = None
245
 
        self.timeout = string_to_delta(config["timeout"])
246
 
        self.interval = string_to_delta(config["interval"])
 
248
        self.timeout = string_to_delta(timeout)
 
249
        self.interval = string_to_delta(interval)
247
250
        self.stop_hook = stop_hook
248
251
        self.checker = None
249
252
        self.checker_initiator_tag = None
250
253
        self.stop_initiator_tag = None
251
254
        self.checker_callback_tag = None
252
 
        self.check_command = config["checker"]
 
255
        self.check_command = checker
253
256
    def start(self):
254
257
        """Start this client's checker and timeout hooks"""
255
258
        # Schedule a new checker to be started an 'interval' from now,
268
271
        The possibility that a client might be restarted is left open,
269
272
        but not currently used."""
270
273
        # If this client doesn't have a secret, it is already stopped.
271
 
        if hasattr(self, "secret") and self.secret:
272
 
            logger.info(u"Stopping client %s", self.name)
 
274
        if self.secret:
 
275
            logger.debug(u"Stopping client %s", self.name)
273
276
            self.secret = None
274
277
        else:
275
278
            return False
294
297
        self.checker = None
295
298
        if os.WIFEXITED(condition) \
296
299
               and (os.WEXITSTATUS(condition) == 0):
297
 
            logger.info(u"Checker for %(name)s succeeded",
298
 
                        vars(self))
 
300
            logger.debug(u"Checker for %(name)s succeeded",
 
301
                         vars(self))
299
302
            self.last_checked_ok = now
300
303
            gobject.source_remove(self.stop_initiator_tag)
301
304
            self.stop_initiator_tag = gobject.timeout_add\
305
308
            logger.warning(u"Checker for %(name)s crashed?",
306
309
                           vars(self))
307
310
        else:
308
 
            logger.info(u"Checker for %(name)s failed",
309
 
                        vars(self))
 
311
            logger.debug(u"Checker for %(name)s failed",
 
312
                         vars(self))
310
313
    def start_checker(self):
311
314
        """Start a new checker subprocess if one is not running.
312
315
        If a checker already exists, leave it running and do
322
325
        if self.checker is None:
323
326
            try:
324
327
                # In case check_command has exactly one % operator
325
 
                command = self.check_command % self.host
 
328
                command = self.check_command % self.fqdn
326
329
            except TypeError:
327
330
                # Escape attributes for the shell
328
331
                escaped_attrs = dict((key, re.escape(str(val)))
335
338
                                 u' %s', self.check_command, error)
336
339
                    return True # Try again later
337
340
            try:
338
 
                logger.info(u"Starting checker %r for %s",
339
 
                            command, self.name)
340
 
                # We don't need to redirect stdout and stderr, since
341
 
                # in normal mode, that is already done by daemon(),
342
 
                # and in debug mode we don't want to.  (Stdin is
343
 
                # always replaced by /dev/null.)
 
341
                logger.debug(u"Starting checker %r for %s",
 
342
                             command, self.name)
344
343
                self.checker = subprocess.Popen(command,
345
344
                                                close_fds=True,
346
345
                                                shell=True, cwd="/")
347
346
                self.checker_callback_tag = gobject.child_watch_add\
348
347
                                            (self.checker.pid,
349
348
                                             self.checker_callback)
350
 
            except OSError, error:
 
349
            except subprocess.OSError, error:
351
350
                logger.error(u"Failed to start subprocess: %s",
352
351
                             error)
353
352
        # Re-run this periodically if run by gobject.timeout_add
359
358
            self.checker_callback_tag = None
360
359
        if getattr(self, "checker", None) is None:
361
360
            return
362
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
361
        logger.debug("Stopping checker for %(name)s", vars(self))
363
362
        try:
364
363
            os.kill(self.checker.pid, signal.SIGTERM)
365
364
            #os.sleep(0.5)
397
396
 
398
397
def fingerprint(openpgp):
399
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))
400
403
    # New GnuTLS "datum" with the OpenPGP public key
401
404
    datum = gnutls.library.types.gnutls_datum_t\
402
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
403
406
                     ctypes.POINTER(ctypes.c_ubyte)),
404
407
         ctypes.c_uint(len(openpgp)))
405
 
    # New empty GnuTLS certificate
406
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
408
 
        (ctypes.byref(crt))
409
408
    # Import the OpenPGP public key into the certificate
410
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
411
 
                    (crt, ctypes.byref(datum),
412
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
 
    # Verify the self signature in the key
414
 
    crtverify = ctypes.c_uint();
415
 
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
416
 
        (crt, ctypes.c_uint(0), ctypes.byref(crtverify))
417
 
    if crtverify.value != 0:
418
 
        tmp = open("/tmp/tmp.gpg", "w")
419
 
        tmp.write(openpgp)
420
 
        tmp.close()
421
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
422
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
409
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
410
        (crt,
 
411
         ctypes.byref(datum),
 
412
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
423
413
    # New buffer for the fingerprint
424
414
    buffer = ctypes.create_string_buffer(20)
425
415
    buffer_length = ctypes.c_size_t()
441
431
    Note: This will run in its own forked process."""
442
432
    
443
433
    def handle(self):
444
 
        logger.info(u"TCP connection from: %s",
 
434
        logger.debug(u"TCP connection from: %s",
445
435
                     unicode(self.client_address))
446
436
        session = gnutls.connection.ClientSession\
447
437
                  (self.request, gnutls.connection.X509Credentials())
448
 
        
449
 
        line = self.request.makefile().readline()
450
 
        logger.debug(u"Protocol version: %r", line)
451
 
        try:
452
 
            if int(line.strip().split()[0]) > 1:
453
 
                raise RuntimeError
454
 
        except (ValueError, IndexError, RuntimeError), error:
455
 
            logger.error(u"Unknown protocol version: %s", error)
456
 
            return
457
 
        
458
438
        # Note: gnutls.connection.X509Credentials is really a generic
459
439
        # GnuTLS certificate credentials object so long as no X.509
460
440
        # keys are added to it.  Therefore, we can use it here despite
473
453
        try:
474
454
            session.handshake()
475
455
        except gnutls.errors.GNUTLSError, error:
476
 
            logger.warning(u"Handshake failed: %s", error)
 
456
            logger.debug(u"Handshake failed: %s", error)
477
457
            # Do not run session.bye() here: the session is not
478
458
            # established.  Just abandon the request.
479
459
            return
480
460
        try:
481
461
            fpr = fingerprint(peer_certificate(session))
482
462
        except (TypeError, gnutls.errors.GNUTLSError), error:
483
 
            logger.warning(u"Bad certificate: %s", error)
 
463
            logger.debug(u"Bad certificate: %s", error)
484
464
            session.bye()
485
465
            return
486
466
        logger.debug(u"Fingerprint: %s", fpr)
490
470
                client = c
491
471
                break
492
472
        if not client:
493
 
            logger.warning(u"Client not found for fingerprint: %s",
494
 
                           fpr)
 
473
            logger.debug(u"Client not found for fingerprint: %s", fpr)
495
474
            session.bye()
496
475
            return
497
476
        # Have to check if client.still_valid(), since it is possible
498
477
        # that the client timed out while establishing the GnuTLS
499
478
        # session.
500
479
        if not client.still_valid():
501
 
            logger.warning(u"Client %(name)s is invalid",
502
 
                           vars(client))
 
480
            logger.debug(u"Client %(name)s is invalid", vars(client))
503
481
            session.bye()
504
482
            return
505
483
        sent_size = 0
531
509
        """This overrides the normal server_bind() function
532
510
        to bind to an interface if one was specified, and also NOT to
533
511
        bind to an address or port if they were not specified."""
534
 
        if self.settings["interface"]:
 
512
        if self.settings["interface"] != avahi.IF_UNSPEC:
535
513
            # 25 is from /usr/include/asm-i486/socket.h
536
514
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
537
515
            try:
540
518
                                       self.settings["interface"])
541
519
            except socket.error, error:
542
520
                if error[0] == errno.EPERM:
543
 
                    logger.error(u"No permission to"
544
 
                                 u" bind to interface %s",
545
 
                                 self.settings["interface"])
 
521
                    logger.warning(u"No permission to"
 
522
                                   u" bind to interface %s",
 
523
                                   self.settings["interface"])
546
524
                else:
547
525
                    raise error
548
526
        # Only bind(2) the socket if we really need to.
551
529
                in6addr_any = "::"
552
530
                self.server_address = (in6addr_any,
553
531
                                       self.server_address[1])
554
 
            elif not self.server_address[1]:
 
532
            elif self.server_address[1] is None:
555
533
                self.server_address = (self.server_address[0],
556
534
                                       0)
557
 
#                 if self.settings["interface"]:
558
 
#                     self.server_address = (self.server_address[0],
559
 
#                                            0, # port
560
 
#                                            0, # flowinfo
561
 
#                                            if_nametoindex
562
 
#                                            (self.settings
563
 
#                                             ["interface"]))
564
535
            return super(type(self), self).server_bind()
565
536
 
566
537
 
577
548
    datetime.timedelta(1)
578
549
    >>> string_to_delta(u'1w')
579
550
    datetime.timedelta(7)
580
 
    >>> string_to_delta('5m 30s')
581
 
    datetime.timedelta(0, 330)
582
551
    """
583
 
    timevalue = datetime.timedelta(0)
584
 
    for s in interval.split():
585
 
        try:
586
 
            suffix=unicode(s[-1])
587
 
            value=int(s[:-1])
588
 
            if suffix == u"d":
589
 
                delta = datetime.timedelta(value)
590
 
            elif suffix == u"s":
591
 
                delta = datetime.timedelta(0, value)
592
 
            elif suffix == u"m":
593
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
594
 
            elif suffix == u"h":
595
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
596
 
            elif suffix == u"w":
597
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
598
 
            else:
599
 
                raise ValueError
600
 
        except (ValueError, IndexError):
 
552
    try:
 
553
        suffix=unicode(interval[-1])
 
554
        value=int(interval[:-1])
 
555
        if suffix == u"d":
 
556
            delta = datetime.timedelta(value)
 
557
        elif suffix == u"s":
 
558
            delta = datetime.timedelta(0, value)
 
559
        elif suffix == u"m":
 
560
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
561
        elif suffix == u"h":
 
562
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
563
        elif suffix == u"w":
 
564
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
565
        else:
601
566
            raise ValueError
602
 
        timevalue += delta
603
 
    return timevalue
 
567
    except (ValueError, IndexError):
 
568
        raise ValueError
 
569
    return delta
604
570
 
605
571
 
606
572
def server_state_changed(state):
607
573
    """Derived from the Avahi example code"""
608
574
    if state == avahi.SERVER_COLLISION:
609
 
        logger.error(u"Server name collision")
 
575
        logger.warning(u"Server name collision")
610
576
        service.remove()
611
577
    elif state == avahi.SERVER_RUNNING:
612
578
        service.add()
626
592
                        unicode(error))
627
593
        raise AvahiGroupError("State changed: %s", str(error))
628
594
 
629
 
def if_nametoindex(interface):
 
595
def if_nametoindex(interface, _func=[None]):
630
596
    """Call the C function if_nametoindex(), or equivalent"""
631
 
    global if_nametoindex
 
597
    if _func[0] is not None:
 
598
        return _func[0](interface)
632
599
    try:
633
600
        if "ctypes.util" not in sys.modules:
634
601
            import ctypes.util
635
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
636
 
            (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
637
611
    except (OSError, AttributeError):
638
612
        if "struct" not in sys.modules:
639
613
            import struct
640
614
        if "fcntl" not in sys.modules:
641
615
            import fcntl
642
 
        def if_nametoindex(interface):
 
616
        def the_hard_way(interface):
643
617
            "Get an interface index the hard way, i.e. using fcntl()"
644
618
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
645
619
            s = socket.socket()
648
622
            s.close()
649
623
            interface_index = struct.unpack("I", ifreq[16:20])[0]
650
624
            return interface_index
651
 
    return if_nametoindex(interface)
652
 
 
653
 
 
654
 
def daemon(nochdir = False, noclose = False):
 
625
        _func[0] = the_hard_way
 
626
        return _func[0](interface)
 
627
 
 
628
 
 
629
def daemon(nochdir, noclose):
655
630
    """See daemon(3).  Standard BSD Unix function.
656
631
    This should really exist as os.daemon, but it doesn't (yet)."""
657
632
    if os.fork():
659
634
    os.setsid()
660
635
    if not nochdir:
661
636
        os.chdir("/")
662
 
    if os.fork():
663
 
        sys.exit()
664
637
    if not noclose:
665
638
        # Close all standard open file descriptors
666
639
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
678
651
    global main_loop_started
679
652
    main_loop_started = False
680
653
    
681
 
    parser = OptionParser(version = "%%prog %s" % version)
 
654
    parser = OptionParser()
682
655
    parser.add_option("-i", "--interface", type="string",
683
656
                      metavar="IF", help="Bind to interface IF")
684
657
    parser.add_option("-a", "--address", type="string",
687
660
                      help="Port number to receive requests on")
688
661
    parser.add_option("--check", action="store_true", default=False,
689
662
                      help="Run self-test")
690
 
    parser.add_option("--debug", action="store_true",
 
663
    parser.add_option("--debug", action="store_true", default=False,
691
664
                      help="Debug mode; run in foreground and log to"
692
665
                      " terminal")
693
666
    parser.add_option("--priority", type="string", help="GnuTLS"
718
691
    # Parse config file for server-global settings
719
692
    server_config = ConfigParser.SafeConfigParser(server_defaults)
720
693
    del server_defaults
721
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
694
    server_config.read(os.path.join(options.configdir, "server.conf"))
 
695
    server_section = "server"
722
696
    # Convert the SafeConfigParser object to a dict
723
 
    server_settings = server_config.defaults()
 
697
    server_settings = dict(server_config.items(server_section))
724
698
    # Use getboolean on the boolean config option
725
699
    server_settings["debug"] = server_config.getboolean\
726
 
                               ("DEFAULT", "debug")
 
700
                               (server_section, "debug")
727
701
    del server_config
 
702
    if not server_settings["interface"]:
 
703
        server_settings["interface"] = avahi.IF_UNSPEC
728
704
    
729
705
    # Override the settings from the config file with command line
730
706
    # options, if set.
736
712
    del options
737
713
    # Now we have our good server settings in "server_settings"
738
714
    
739
 
    debug = server_settings["debug"]
740
 
    
741
 
    if not debug:
742
 
        syslogger.setLevel(logging.WARNING)
743
 
        console.setLevel(logging.WARNING)
744
 
    
745
 
    if server_settings["servicename"] != "Mandos":
746
 
        syslogger.setFormatter(logging.Formatter\
747
 
                               ('Mandos (%s): %%(levelname)s:'
748
 
                                ' %%(message)s'
749
 
                                % server_settings["servicename"]))
750
 
    
751
715
    # Parse config file with clients
752
716
    client_defaults = { "timeout": "1h",
753
717
                        "interval": "5m",
754
 
                        "checker": "fping -q -- %(host)s",
755
 
                        "host": "",
 
718
                        "checker": "fping -q -- %%(fqdn)s",
756
719
                        }
757
720
    client_config = ConfigParser.SafeConfigParser(client_defaults)
758
721
    client_config.read(os.path.join(server_settings["configdir"],
761
724
    global service
762
725
    service = AvahiService(name = server_settings["servicename"],
763
726
                           type = "_mandos._tcp", );
764
 
    if server_settings["interface"]:
765
 
        service.interface = if_nametoindex(server_settings["interface"])
766
727
    
767
728
    global main_loop
768
729
    global bus
776
737
            avahi.DBUS_INTERFACE_SERVER )
777
738
    # End of Avahi example code
778
739
    
 
740
    debug = server_settings["debug"]
 
741
    
 
742
    if debug:
 
743
        console = logging.StreamHandler()
 
744
        # console.setLevel(logging.DEBUG)
 
745
        console.setFormatter(logging.Formatter\
 
746
                             ('%(levelname)s: %(message)s'))
 
747
        logger.addHandler(console)
 
748
        del console
 
749
    
779
750
    clients = Set()
780
751
    def remove_from_clients(client):
781
752
        clients.remove(client)
782
753
        if not clients:
783
 
            logger.critical(u"No clients left, exiting")
 
754
            logger.debug(u"No clients left, exiting")
784
755
            sys.exit()
785
756
    
786
 
    clients.update(Set(Client(name = section,
 
757
    clients.update(Set(Client(name=section,
787
758
                              stop_hook = remove_from_clients,
788
 
                              config
789
 
                              = dict(client_config.items(section)))
 
759
                              **(dict(client_config\
 
760
                                      .items(section))))
790
761
                       for section in client_config.sections()))
791
 
    if not clients:
792
 
        logger.critical(u"No clients defined")
793
 
        sys.exit(1)
794
 
    
795
 
    if debug:
796
 
        # Redirect stdin so all checkers get /dev/null
797
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
798
 
        os.dup2(null, sys.stdin.fileno())
799
 
        if null > 2:
800
 
            os.close(null)
801
 
    else:
802
 
        # No console logging
803
 
        logger.removeHandler(console)
804
 
        # Close all input and output, do double fork, etc.
805
 
        daemon()
806
 
    
807
 
    pidfilename = "/var/run/mandos/mandos.pid"
808
 
    pid = os.getpid()
809
 
    try:
810
 
        pidfile = open(pidfilename, "w")
811
 
        pidfile.write(str(pid) + "\n")
812
 
        pidfile.close()
813
 
        del pidfile
814
 
    except IOError, err:
815
 
        logger.error(u"Could not write %s file with PID %d",
816
 
                     pidfilename, os.getpid())
 
762
    
 
763
    if not debug:
 
764
        daemon(False, False)
817
765
    
818
766
    def cleanup():
819
767
        "Cleanup function; run on exit"
846
794
                                clients=clients)
847
795
    # Find out what port we got
848
796
    service.port = tcp_server.socket.getsockname()[1]
849
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
850
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
797
    logger.debug(u"Now listening on port %d", service.port)
851
798
    
852
 
    #service.interface = tcp_server.socket.getsockname()[3]
 
799
    if not server_settings["interface"]:
 
800
        service.interface = if_nametoindex\
 
801
                            (server_settings["interface"])
853
802
    
854
803
    try:
855
804
        # From the Avahi example code
866
815
                             tcp_server.handle_request\
867
816
                             (*args[2:], **kwargs) or True)
868
817
        
869
 
        logger.debug(u"Starting main loop")
 
818
        logger.debug("Starting main loop")
870
819
        main_loop_started = True
871
820
        main_loop.run()
872
821
    except AvahiError, error: