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  • Committer: Teddy Hogeborn
  • Date: 2008-09-12 19:12:40 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080912191240-edjlcll43eoijkx0
* Makefile (install): Use "install-client-nokey".
  (install-server): Create "/etc/default" and "/usr/sbin", too.
  (install-client): Do not depend on "$(INITRAMFSTOOLS)/hooks/.".
                    Renamed to "install-client-nokey".  Split out
                    post-installation-stuff to new "install-client"
                    target.

* mandos-clients.conf.xml: White space adjustments.
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -

* overview.xml: Improved grammar.

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mandos
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
# 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".
 
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
 
28
# <http://www.gnu.org/licenses/>.
 
29
# 
 
30
# Contact the authors at <mandos@fukt.bsnet.se>.
 
31
# 
2
32
 
3
33
from __future__ import division
4
34
 
21
51
import signal
22
52
from sets import Set
23
53
import subprocess
 
54
import atexit
 
55
import stat
 
56
import logging
 
57
import logging.handlers
 
58
import pwd
24
59
 
25
60
import dbus
26
61
import gobject
28
63
from dbus.mainloop.glib import DBusGMainLoop
29
64
import ctypes
30
65
 
31
 
# This variable is used to optionally bind to a specified interface.
32
 
# It is a global variable to fit in with the other variables from the
33
 
# Avahi server example code.
34
 
serviceInterface = avahi.IF_UNSPEC
35
 
# From the Avahi server example code:
36
 
serviceName = "Mandos"
37
 
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
38
 
servicePort = None                      # Not known at startup
39
 
serviceTXT = []                         # TXT record for the service
40
 
domain = ""                  # Domain to publish on, default to .local
41
 
host = ""          # Host to publish records for, default to localhost
42
 
group = None #our entry group
43
 
rename_count = 12       # Counter so we only rename after collisions a
44
 
                        # sensible number of times
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
 
74
logger.addHandler(syslogger)
 
75
 
 
76
console = logging.StreamHandler()
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
 
79
logger.addHandler(console)
 
80
 
 
81
class AvahiError(Exception):
 
82
    def __init__(self, value):
 
83
        self.value = value
 
84
    def __str__(self):
 
85
        return repr(self.value)
 
86
 
 
87
class AvahiServiceError(AvahiError):
 
88
    pass
 
89
 
 
90
class AvahiGroupError(AvahiError):
 
91
    pass
 
92
 
 
93
 
 
94
class AvahiService(object):
 
95
    """An Avahi (Zeroconf) service.
 
96
    Attributes:
 
97
    interface: integer; avahi.IF_UNSPEC or an interface index.
 
98
               Used to optionally bind to the specified interface.
 
99
    name: string; Example: 'Mandos'
 
100
    type: string; Example: '_mandos._tcp'.
 
101
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
102
    port: integer; what port to announce
 
103
    TXT: list of strings; TXT record for the service
 
104
    domain: string; Domain to publish on, default to .local if empty.
 
105
    host: string; Host to publish records for, default is localhost
 
106
    max_renames: integer; maximum number of renames
 
107
    rename_count: integer; counter so we only rename after collisions
 
108
                  a sensible number of times
 
109
    """
 
110
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
 
111
                 type = None, port = None, TXT = None, domain = "",
 
112
                 host = "", max_renames = 32768):
 
113
        self.interface = interface
 
114
        self.name = name
 
115
        self.type = type
 
116
        self.port = port
 
117
        if TXT is None:
 
118
            self.TXT = []
 
119
        else:
 
120
            self.TXT = TXT
 
121
        self.domain = domain
 
122
        self.host = host
 
123
        self.rename_count = 0
 
124
        self.max_renames = max_renames
 
125
    def rename(self):
 
126
        """Derived from the Avahi example code"""
 
127
        if self.rename_count >= self.max_renames:
 
128
            logger.critical(u"No suitable Zeroconf service name found"
 
129
                            u" after %i retries, exiting.",
 
130
                            rename_count)
 
131
            raise AvahiServiceError("Too many renames")
 
132
        self.name = server.GetAlternativeServiceName(self.name)
 
133
        logger.info(u"Changing Zeroconf service name to %r ...",
 
134
                    str(self.name))
 
135
        syslogger.setFormatter(logging.Formatter\
 
136
                               ('Mandos (%s): %%(levelname)s:'
 
137
                               ' %%(message)s' % self.name))
 
138
        self.remove()
 
139
        self.add()
 
140
        self.rename_count += 1
 
141
    def remove(self):
 
142
        """Derived from the Avahi example code"""
 
143
        if group is not None:
 
144
            group.Reset()
 
145
    def add(self):
 
146
        """Derived from the Avahi example code"""
 
147
        global group
 
148
        if group is None:
 
149
            group = dbus.Interface\
 
150
                    (bus.get_object(avahi.DBUS_NAME,
 
151
                                    server.EntryGroupNew()),
 
152
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
            group.connect_to_signal('StateChanged',
 
154
                                    entry_group_state_changed)
 
155
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
156
                     service.name, service.type)
 
157
        group.AddService(
 
158
                self.interface,         # interface
 
159
                avahi.PROTO_INET6,      # protocol
 
160
                dbus.UInt32(0),         # flags
 
161
                self.name, self.type,
 
162
                self.domain, self.host,
 
163
                dbus.UInt16(self.port),
 
164
                avahi.string_array_to_txt_array(self.TXT))
 
165
        group.Commit()
 
166
 
 
167
# From the Avahi example code:
 
168
group = None                            # our entry group
45
169
# End of Avahi example code
46
170
 
47
171
 
52
176
    fingerprint: string (40 or 32 hexadecimal digits); used to
53
177
                 uniquely identify the client
54
178
    secret:    bytestring; sent verbatim (over TLS) to client
55
 
    fqdn:      string (FQDN); available for use by the checker command
56
 
    created:   datetime.datetime()
57
 
    last_seen: datetime.datetime() or None if not yet seen
58
 
    timeout:   datetime.timedelta(); How long from last_seen until
59
 
                                     this client is invalid
 
179
    host:      string; available for use by the checker command
 
180
    created:   datetime.datetime(); object creation, not client host
 
181
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
182
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
183
                                     until this client is invalid
60
184
    interval:  datetime.timedelta(); How often to start a new checker
61
185
    stop_hook: If set, called by stop() as stop_hook(self)
62
186
    checker:   subprocess.Popen(); a running checker process used
63
187
                                   to see if the client lives.
64
 
                                   Is None if no process is running.
 
188
                                   'None' if no process is running.
65
189
    checker_initiator_tag: a gobject event source tag, or None
66
190
    stop_initiator_tag:    - '' -
67
191
    checker_callback_tag:  - '' -
68
192
    checker_command: string; External command which is run to check if
69
 
                     client lives.  %()s expansions are done at
 
193
                     client lives.  %() expansions are done at
70
194
                     runtime with vars(self) as dict, so that for
71
195
                     instance %(name)s can be used in the command.
72
196
    Private attibutes:
73
197
    _timeout: Real variable for 'timeout'
74
198
    _interval: Real variable for 'interval'
75
 
    _timeout_milliseconds: Used by gobject.timeout_add()
 
199
    _timeout_milliseconds: Used when calling gobject.timeout_add()
76
200
    _interval_milliseconds: - '' -
77
201
    """
78
202
    def _set_timeout(self, timeout):
98
222
    interval = property(lambda self: self._interval,
99
223
                        _set_interval)
100
224
    del _set_interval
101
 
    def __init__(self, name=None, options=None, stop_hook=None,
102
 
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
103
 
                 timeout=None, interval=-1, checker=None):
 
225
    def __init__(self, name = None, stop_hook=None, config={}):
 
226
        """Note: the 'checker' key in 'config' sets the
 
227
        'checker_command' attribute and *not* the 'checker'
 
228
        attribute."""
104
229
        self.name = name
105
 
        # Uppercase and remove spaces from fingerprint
106
 
        # for later comparison purposes with return value of
107
 
        # the fingerprint() function
108
 
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
109
 
        if secret:
110
 
            self.secret = secret.decode(u"base64")
111
 
        elif secfile:
112
 
            sf = open(secfile)
 
230
        logger.debug(u"Creating client %r", self.name)
 
231
        # Uppercase and remove spaces from fingerprint for later
 
232
        # comparison purposes with return value from the fingerprint()
 
233
        # function
 
234
        self.fingerprint = config["fingerprint"].upper()\
 
235
                           .replace(u" ", u"")
 
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
237
        if "secret" in config:
 
238
            self.secret = config["secret"].decode(u"base64")
 
239
        elif "secfile" in config:
 
240
            sf = open(config["secfile"])
113
241
            self.secret = sf.read()
114
242
            sf.close()
115
243
        else:
116
 
            raise RuntimeError(u"No secret or secfile for client %s"
117
 
                               % self.name)
118
 
        self.fqdn = fqdn                # string
 
244
            raise TypeError(u"No secret or secfile for client %s"
 
245
                            % self.name)
 
246
        self.host = config.get("host", "")
119
247
        self.created = datetime.datetime.now()
120
 
        self.last_seen = None
121
 
        if timeout is None:
122
 
            timeout = options.timeout
123
 
        self.timeout = timeout
124
 
        if interval == -1:
125
 
            interval = options.interval
126
 
        else:
127
 
            interval = string_to_delta(interval)
128
 
        self.interval = interval
 
248
        self.last_checked_ok = None
 
249
        self.timeout = string_to_delta(config["timeout"])
 
250
        self.interval = string_to_delta(config["interval"])
129
251
        self.stop_hook = stop_hook
130
252
        self.checker = None
131
253
        self.checker_initiator_tag = None
132
254
        self.stop_initiator_tag = None
133
255
        self.checker_callback_tag = None
134
 
        self.check_command = checker
 
256
        self.check_command = config["checker"]
135
257
    def start(self):
136
 
        """Start this clients checker and timeout hooks"""
 
258
        """Start this client's checker and timeout hooks"""
137
259
        # Schedule a new checker to be started an 'interval' from now,
138
260
        # and every interval from then on.
139
261
        self.checker_initiator_tag = gobject.timeout_add\
147
269
                                   self.stop)
148
270
    def stop(self):
149
271
        """Stop this client.
150
 
        The possibility that this client might be restarted is left
151
 
        open, but not currently used."""
152
 
        if debug:
153
 
            sys.stderr.write(u"Stopping client %s\n" % self.name)
154
 
        self.secret = None
155
 
        if self.stop_initiator_tag:
 
272
        The possibility that a client might be restarted is left open,
 
273
        but not currently used."""
 
274
        # If this client doesn't have a secret, it is already stopped.
 
275
        if hasattr(self, "secret") and self.secret:
 
276
            logger.info(u"Stopping client %s", self.name)
 
277
            self.secret = None
 
278
        else:
 
279
            return False
 
280
        if getattr(self, "stop_initiator_tag", False):
156
281
            gobject.source_remove(self.stop_initiator_tag)
157
282
            self.stop_initiator_tag = None
158
 
        if self.checker_initiator_tag:
 
283
        if getattr(self, "checker_initiator_tag", False):
159
284
            gobject.source_remove(self.checker_initiator_tag)
160
285
            self.checker_initiator_tag = None
161
286
        self.stop_checker()
164
289
        # Do not run this again if called by a gobject.timeout_add
165
290
        return False
166
291
    def __del__(self):
167
 
        # Some code duplication here and in stop()
168
 
        if hasattr(self, "stop_initiator_tag") \
169
 
               and self.stop_initiator_tag:
170
 
            gobject.source_remove(self.stop_initiator_tag)
171
 
            self.stop_initiator_tag = None
172
 
        if hasattr(self, "checker_initiator_tag") \
173
 
               and self.checker_initiator_tag:
174
 
            gobject.source_remove(self.checker_initiator_tag)
175
 
            self.checker_initiator_tag = None
176
 
        self.stop_checker()
 
292
        self.stop_hook = None
 
293
        self.stop()
177
294
    def checker_callback(self, pid, condition):
178
295
        """The checker has completed, so take appropriate actions."""
179
296
        now = datetime.datetime.now()
 
297
        self.checker_callback_tag = None
 
298
        self.checker = None
180
299
        if os.WIFEXITED(condition) \
181
300
               and (os.WEXITSTATUS(condition) == 0):
182
 
            if debug:
183
 
                sys.stderr.write(u"Checker for %(name)s succeeded\n"
184
 
                                 % vars(self))
185
 
            self.last_seen = now
 
301
            logger.info(u"Checker for %(name)s succeeded",
 
302
                        vars(self))
 
303
            self.last_checked_ok = now
186
304
            gobject.source_remove(self.stop_initiator_tag)
187
305
            self.stop_initiator_tag = gobject.timeout_add\
188
306
                                      (self._timeout_milliseconds,
189
307
                                       self.stop)
190
 
        elif debug:
191
 
            if not os.WIFEXITED(condition):
192
 
                sys.stderr.write(u"Checker for %(name)s crashed?\n"
193
 
                                 % vars(self))
194
 
            else:
195
 
                sys.stderr.write(u"Checker for %(name)s failed\n"
196
 
                                 % vars(self))
197
 
        self.checker = None
198
 
        self.checker_callback_tag = None
 
308
        elif not os.WIFEXITED(condition):
 
309
            logger.warning(u"Checker for %(name)s crashed?",
 
310
                           vars(self))
 
311
        else:
 
312
            logger.info(u"Checker for %(name)s failed",
 
313
                        vars(self))
199
314
    def start_checker(self):
200
315
        """Start a new checker subprocess if one is not running.
201
316
        If a checker already exists, leave it running and do
202
317
        nothing."""
 
318
        # The reason for not killing a running checker is that if we
 
319
        # did that, then if a checker (for some reason) started
 
320
        # running slowly and taking more than 'interval' time, the
 
321
        # client would inevitably timeout, since no checker would get
 
322
        # a chance to run to completion.  If we instead leave running
 
323
        # checkers alone, the checker would have to take more time
 
324
        # than 'timeout' for the client to be declared invalid, which
 
325
        # is as it should be.
203
326
        if self.checker is None:
204
 
            if debug:
205
 
                sys.stderr.write(u"Starting checker for %s\n"
206
 
                                 % self.name)
207
327
            try:
208
 
                command = self.check_command % self.fqdn
 
328
                # In case check_command has exactly one % operator
 
329
                command = self.check_command % self.host
209
330
            except TypeError:
 
331
                # Escape attributes for the shell
210
332
                escaped_attrs = dict((key, re.escape(str(val)))
211
333
                                     for key, val in
212
334
                                     vars(self).iteritems())
213
 
                command = self.check_command % escaped_attrs
 
335
                try:
 
336
                    command = self.check_command % escaped_attrs
 
337
                except TypeError, error:
 
338
                    logger.error(u'Could not format string "%s":'
 
339
                                 u' %s', self.check_command, error)
 
340
                    return True # Try again later
214
341
            try:
215
 
                self.checker = subprocess.\
216
 
                               Popen(command,
217
 
                                     stdout=subprocess.PIPE,
218
 
                                     close_fds=True, shell=True,
219
 
                                     cwd="/")
220
 
                self.checker_callback_tag = gobject.\
221
 
                                            child_watch_add(self.checker.pid,
222
 
                                                            self.\
223
 
                                                            checker_callback)
224
 
            except subprocess.OSError, error:
225
 
                sys.stderr.write(u"Failed to start subprocess: %s\n"
226
 
                                 % error)
 
342
                logger.info(u"Starting checker %r for %s",
 
343
                            command, self.name)
 
344
                # We don't need to redirect stdout and stderr, since
 
345
                # in normal mode, that is already done by daemon(),
 
346
                # and in debug mode we don't want to.  (Stdin is
 
347
                # always replaced by /dev/null.)
 
348
                self.checker = subprocess.Popen(command,
 
349
                                                close_fds=True,
 
350
                                                shell=True, cwd="/")
 
351
                self.checker_callback_tag = gobject.child_watch_add\
 
352
                                            (self.checker.pid,
 
353
                                             self.checker_callback)
 
354
            except OSError, error:
 
355
                logger.error(u"Failed to start subprocess: %s",
 
356
                             error)
227
357
        # Re-run this periodically if run by gobject.timeout_add
228
358
        return True
229
359
    def stop_checker(self):
230
360
        """Force the checker process, if any, to stop."""
231
 
        if not hasattr(self, "checker") or self.checker is None:
 
361
        if self.checker_callback_tag:
 
362
            gobject.source_remove(self.checker_callback_tag)
 
363
            self.checker_callback_tag = None
 
364
        if getattr(self, "checker", None) is None:
232
365
            return
233
 
        gobject.source_remove(self.checker_callback_tag)
234
 
        self.checker_callback_tag = None
235
 
        os.kill(self.checker.pid, signal.SIGTERM)
236
 
        if self.checker.poll() is None:
237
 
            os.kill(self.checker.pid, signal.SIGKILL)
 
366
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
367
        try:
 
368
            os.kill(self.checker.pid, signal.SIGTERM)
 
369
            #os.sleep(0.5)
 
370
            #if self.checker.poll() is None:
 
371
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
372
        except OSError, error:
 
373
            if error.errno != errno.ESRCH: # No such process
 
374
                raise
238
375
        self.checker = None
239
 
    def still_valid(self, now=None):
 
376
    def still_valid(self):
240
377
        """Has the timeout not yet passed for this client?"""
241
 
        if now is None:
242
 
            now = datetime.datetime.now()
243
 
        if self.last_seen is None:
 
378
        now = datetime.datetime.now()
 
379
        if self.last_checked_ok is None:
244
380
            return now < (self.created + self.timeout)
245
381
        else:
246
 
            return now < (self.last_seen + self.timeout)
 
382
            return now < (self.last_checked_ok + self.timeout)
247
383
 
248
384
 
249
385
def peer_certificate(session):
 
386
    "Return the peer's OpenPGP certificate as a bytestring"
250
387
    # If not an OpenPGP certificate...
251
388
    if gnutls.library.functions.gnutls_certificate_type_get\
252
389
            (session._c_object) \
263
400
 
264
401
 
265
402
def fingerprint(openpgp):
266
 
    # New empty GnuTLS certificate
267
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
268
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
269
 
        (ctypes.byref(crt))
 
403
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
270
404
    # New GnuTLS "datum" with the OpenPGP public key
271
405
    datum = gnutls.library.types.gnutls_datum_t\
272
406
        (ctypes.cast(ctypes.c_char_p(openpgp),
273
407
                     ctypes.POINTER(ctypes.c_ubyte)),
274
408
         ctypes.c_uint(len(openpgp)))
 
409
    # New empty GnuTLS certificate
 
410
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
411
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
412
        (ctypes.byref(crt))
275
413
    # Import the OpenPGP public key into the certificate
276
 
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
277
 
        (crt,
278
 
         ctypes.byref(datum),
279
 
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
414
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
415
                    (crt, ctypes.byref(datum),
 
416
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
417
    # Verify the self signature in the key
 
418
    crtverify = ctypes.c_uint();
 
419
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
420
        (crt, 0, ctypes.byref(crtverify))
 
421
    if crtverify.value != 0:
 
422
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
423
        raise gnutls.errors.CertificateSecurityError("Verify failed")
280
424
    # New buffer for the fingerprint
281
425
    buffer = ctypes.create_string_buffer(20)
282
426
    buffer_length = ctypes.c_size_t()
298
442
    Note: This will run in its own forked process."""
299
443
    
300
444
    def handle(self):
301
 
        if debug:
302
 
            sys.stderr.write(u"TCP request came\n")
303
 
            sys.stderr.write(u"Request: %s\n" % self.request)
304
 
            sys.stderr.write(u"Client Address: %s\n"
305
 
                             % unicode(self.client_address))
306
 
            sys.stderr.write(u"Server: %s\n" % self.server)
307
 
        session = gnutls.connection.ClientSession(self.request,
308
 
                                                  gnutls.connection.\
309
 
                                                  X509Credentials())
 
445
        logger.info(u"TCP connection from: %s",
 
446
                     unicode(self.client_address))
 
447
        session = gnutls.connection.ClientSession\
 
448
                  (self.request, gnutls.connection.X509Credentials())
 
449
        
 
450
        line = self.request.makefile().readline()
 
451
        logger.debug(u"Protocol version: %r", line)
 
452
        try:
 
453
            if int(line.strip().split()[0]) > 1:
 
454
                raise RuntimeError
 
455
        except (ValueError, IndexError, RuntimeError), error:
 
456
            logger.error(u"Unknown protocol version: %s", error)
 
457
            return
 
458
        
 
459
        # Note: gnutls.connection.X509Credentials is really a generic
 
460
        # GnuTLS certificate credentials object so long as no X.509
 
461
        # keys are added to it.  Therefore, we can use it here despite
 
462
        # using OpenPGP certificates.
310
463
        
311
464
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
312
465
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
313
466
        #                "+DHE-DSS"))
314
 
        priority = "SECURE256"
315
 
        
 
467
        priority = "NORMAL"             # Fallback default, since this
 
468
                                        # MUST be set.
 
469
        if self.server.settings["priority"]:
 
470
            priority = self.server.settings["priority"]
316
471
        gnutls.library.functions.gnutls_priority_set_direct\
317
472
            (session._c_object, priority, None);
318
473
        
319
474
        try:
320
475
            session.handshake()
321
476
        except gnutls.errors.GNUTLSError, error:
322
 
            if debug:
323
 
                sys.stderr.write(u"Handshake failed: %s\n" % error)
 
477
            logger.warning(u"Handshake failed: %s", error)
324
478
            # Do not run session.bye() here: the session is not
325
479
            # established.  Just abandon the request.
326
480
            return
327
481
        try:
328
482
            fpr = fingerprint(peer_certificate(session))
329
483
        except (TypeError, gnutls.errors.GNUTLSError), error:
330
 
            if debug:
331
 
                sys.stderr.write(u"Bad certificate: %s\n" % error)
 
484
            logger.warning(u"Bad certificate: %s", error)
332
485
            session.bye()
333
486
            return
334
 
        if debug:
335
 
            sys.stderr.write(u"Fingerprint: %s\n" % fpr)
 
487
        logger.debug(u"Fingerprint: %s", fpr)
336
488
        client = None
337
 
        for c in clients:
 
489
        for c in self.server.clients:
338
490
            if c.fingerprint == fpr:
339
491
                client = c
340
492
                break
 
493
        if not client:
 
494
            logger.warning(u"Client not found for fingerprint: %s",
 
495
                           fpr)
 
496
            session.bye()
 
497
            return
341
498
        # Have to check if client.still_valid(), since it is possible
342
499
        # that the client timed out while establishing the GnuTLS
343
500
        # session.
344
 
        if (not client) or (not client.still_valid()):
345
 
            if debug:
346
 
                if client:
347
 
                    sys.stderr.write(u"Client %(name)s is invalid\n"
348
 
                                     % vars(client))
349
 
                else:
350
 
                    sys.stderr.write(u"Client not found for "
351
 
                                     u"fingerprint: %s\n" % fpr)
 
501
        if not client.still_valid():
 
502
            logger.warning(u"Client %(name)s is invalid",
 
503
                           vars(client))
352
504
            session.bye()
353
505
            return
354
506
        sent_size = 0
355
507
        while sent_size < len(client.secret):
356
508
            sent = session.send(client.secret[sent_size:])
357
 
            if debug:
358
 
                sys.stderr.write(u"Sent: %d, remaining: %d\n"
359
 
                                 % (sent, len(client.secret)
360
 
                                    - (sent_size + sent)))
 
509
            logger.debug(u"Sent: %d, remaining: %d",
 
510
                         sent, len(client.secret)
 
511
                         - (sent_size + sent))
361
512
            sent_size += sent
362
513
        session.bye()
363
514
 
365
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
517
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
367
518
    Attributes:
368
 
        options:        Command line options
 
519
        settings:       Server settings
369
520
        clients:        Set() of Client objects
 
521
        enabled:        Boolean; whether this server is activated yet
370
522
    """
371
523
    address_family = socket.AF_INET6
372
524
    def __init__(self, *args, **kwargs):
373
 
        if "options" in kwargs:
374
 
            self.options = kwargs["options"]
375
 
            del kwargs["options"]
 
525
        if "settings" in kwargs:
 
526
            self.settings = kwargs["settings"]
 
527
            del kwargs["settings"]
376
528
        if "clients" in kwargs:
377
529
            self.clients = kwargs["clients"]
378
530
            del kwargs["clients"]
 
531
        self.enabled = False
379
532
        return super(type(self), self).__init__(*args, **kwargs)
380
533
    def server_bind(self):
381
534
        """This overrides the normal server_bind() function
382
535
        to bind to an interface if one was specified, and also NOT to
383
536
        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
 
537
        if self.settings["interface"]:
 
538
            # 25 is from /usr/include/asm-i486/socket.h
 
539
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
388
540
            try:
389
541
                self.socket.setsockopt(socket.SOL_SOCKET,
390
 
                                       socket.SO_BINDTODEVICE,
391
 
                                       self.options.interface)
 
542
                                       SO_BINDTODEVICE,
 
543
                                       self.settings["interface"])
392
544
            except socket.error, error:
393
545
                if error[0] == errno.EPERM:
394
 
                    sys.stderr.write(u"Warning: No permission to" \
395
 
                                     u" bind to interface %s\n"
396
 
                                     % self.options.interface)
 
546
                    logger.error(u"No permission to"
 
547
                                 u" bind to interface %s",
 
548
                                 self.settings["interface"])
397
549
                else:
398
550
                    raise error
399
551
        # Only bind(2) the socket if we really need to.
402
554
                in6addr_any = "::"
403
555
                self.server_address = (in6addr_any,
404
556
                                       self.server_address[1])
405
 
            elif self.server_address[1] is None:
 
557
            elif not self.server_address[1]:
406
558
                self.server_address = (self.server_address[0],
407
559
                                       0)
 
560
#                 if self.settings["interface"]:
 
561
#                     self.server_address = (self.server_address[0],
 
562
#                                            0, # port
 
563
#                                            0, # flowinfo
 
564
#                                            if_nametoindex
 
565
#                                            (self.settings
 
566
#                                             ["interface"]))
408
567
            return super(type(self), self).server_bind()
 
568
    def server_activate(self):
 
569
        if self.enabled:
 
570
            return super(type(self), self).server_activate()
 
571
    def enable(self):
 
572
        self.enabled = True
409
573
 
410
574
 
411
575
def string_to_delta(interval):
421
585
    datetime.timedelta(1)
422
586
    >>> string_to_delta(u'1w')
423
587
    datetime.timedelta(7)
 
588
    >>> string_to_delta('5m 30s')
 
589
    datetime.timedelta(0, 330)
424
590
    """
425
 
    try:
426
 
        suffix=unicode(interval[-1])
427
 
        value=int(interval[:-1])
428
 
        if suffix == u"d":
429
 
            delta = datetime.timedelta(value)
430
 
        elif suffix == u"s":
431
 
            delta = datetime.timedelta(0, value)
432
 
        elif suffix == u"m":
433
 
            delta = datetime.timedelta(0, 0, 0, 0, value)
434
 
        elif suffix == u"h":
435
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
 
        elif suffix == u"w":
437
 
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
 
        else:
 
591
    timevalue = datetime.timedelta(0)
 
592
    for s in interval.split():
 
593
        try:
 
594
            suffix=unicode(s[-1])
 
595
            value=int(s[:-1])
 
596
            if suffix == u"d":
 
597
                delta = datetime.timedelta(value)
 
598
            elif suffix == u"s":
 
599
                delta = datetime.timedelta(0, value)
 
600
            elif suffix == u"m":
 
601
                delta = datetime.timedelta(0, 0, 0, 0, value)
 
602
            elif suffix == u"h":
 
603
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
604
            elif suffix == u"w":
 
605
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
606
            else:
 
607
                raise ValueError
 
608
        except (ValueError, IndexError):
439
609
            raise ValueError
440
 
    except (ValueError, IndexError):
441
 
        raise ValueError
442
 
    return delta
443
 
 
444
 
 
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
 
    if debug:
457
 
        sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
458
 
                         % (serviceName, serviceType))
459
 
    
460
 
    group.AddService(
461
 
            serviceInterface,           # interface
462
 
            avahi.PROTO_INET6,          # protocol
463
 
            dbus.UInt32(0),             # flags
464
 
            serviceName, serviceType,
465
 
            domain, host,
466
 
            dbus.UInt16(servicePort),
467
 
            avahi.string_array_to_txt_array(serviceTXT))
468
 
    group.Commit()
469
 
 
470
 
 
471
 
def remove_service():
472
 
    """From the Avahi server example code"""
473
 
    global group
474
 
    
475
 
    if not group is None:
476
 
        group.Reset()
 
610
        timevalue += delta
 
611
    return timevalue
477
612
 
478
613
 
479
614
def server_state_changed(state):
480
 
    """From the Avahi server example code"""
 
615
    """Derived from the Avahi example code"""
481
616
    if state == avahi.SERVER_COLLISION:
482
 
        sys.stderr.write(u"WARNING: Server name collision\n")
483
 
        remove_service()
 
617
        logger.error(u"Zeroconf server name collision")
 
618
        service.remove()
484
619
    elif state == avahi.SERVER_RUNNING:
485
 
        add_service()
 
620
        service.add()
486
621
 
487
622
 
488
623
def entry_group_state_changed(state, error):
489
 
    """From the Avahi server example code"""
490
 
    global serviceName, server, rename_count
491
 
    
492
 
    if debug:
493
 
        sys.stderr.write(u"state change: %i\n" % state)
 
624
    """Derived from the Avahi example code"""
 
625
    logger.debug(u"Avahi state change: %i", state)
494
626
    
495
627
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
496
 
        if debug:
497
 
            sys.stderr.write(u"Service established.\n")
 
628
        logger.debug(u"Zeroconf service established.")
498
629
    elif state == avahi.ENTRY_GROUP_COLLISION:
499
 
        
500
 
        rename_count = rename_count - 1
501
 
        if rename_count > 0:
502
 
            name = server.GetAlternativeServiceName(name)
503
 
            sys.stderr.write(u"WARNING: Service name collision, "
504
 
                             u"changing name to '%s' ...\n" % name)
505
 
            remove_service()
506
 
            add_service()
507
 
            
508
 
        else:
509
 
            sys.stderr.write(u"ERROR: No suitable service name found "
510
 
                             u"after %i retries, exiting.\n"
511
 
                             % n_rename)
512
 
            main_loop.quit()
 
630
        logger.warning(u"Zeroconf service name collision.")
 
631
        service.rename()
513
632
    elif state == avahi.ENTRY_GROUP_FAILURE:
514
 
        sys.stderr.write(u"Error in group state changed %s\n"
515
 
                         % unicode(error))
516
 
        main_loop.quit()
517
 
        return
518
 
 
 
633
        logger.critical(u"Avahi: Error in group state changed %s",
 
634
                        unicode(error))
 
635
        raise AvahiGroupError("State changed: %s", str(error))
519
636
 
520
637
def if_nametoindex(interface):
521
 
    """Call the C function if_nametoindex()"""
 
638
    """Call the C function if_nametoindex(), or equivalent"""
 
639
    global if_nametoindex
522
640
    try:
523
 
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
524
 
        return libc.if_nametoindex(interface)
 
641
        if "ctypes.util" not in sys.modules:
 
642
            import ctypes.util
 
643
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
644
            (ctypes.util.find_library("c")).if_nametoindex
525
645
    except (OSError, AttributeError):
526
646
        if "struct" not in sys.modules:
527
647
            import struct
528
648
        if "fcntl" not in sys.modules:
529
649
            import fcntl
530
 
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
531
 
        s = socket.socket()
532
 
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
533
 
                            struct.pack("16s16x", interface))
534
 
        s.close()
535
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
536
 
        return interface_index
537
 
 
538
 
 
539
 
if __name__ == '__main__':
540
 
    parser = OptionParser()
 
650
        def if_nametoindex(interface):
 
651
            "Get an interface index the hard way, i.e. using fcntl()"
 
652
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
653
            s = socket.socket()
 
654
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
655
                                struct.pack("16s16x", interface))
 
656
            s.close()
 
657
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
658
            return interface_index
 
659
    return if_nametoindex(interface)
 
660
 
 
661
 
 
662
def daemon(nochdir = False, noclose = False):
 
663
    """See daemon(3).  Standard BSD Unix function.
 
664
    This should really exist as os.daemon, but it doesn't (yet)."""
 
665
    if os.fork():
 
666
        sys.exit()
 
667
    os.setsid()
 
668
    if not nochdir:
 
669
        os.chdir("/")
 
670
    if os.fork():
 
671
        sys.exit()
 
672
    if not noclose:
 
673
        # Close all standard open file descriptors
 
674
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
675
        if not stat.S_ISCHR(os.fstat(null).st_mode):
 
676
            raise OSError(errno.ENODEV,
 
677
                          "/dev/null not a character device")
 
678
        os.dup2(null, sys.stdin.fileno())
 
679
        os.dup2(null, sys.stdout.fileno())
 
680
        os.dup2(null, sys.stderr.fileno())
 
681
        if null > 2:
 
682
            os.close(null)
 
683
 
 
684
 
 
685
def main():
 
686
    global main_loop_started
 
687
    main_loop_started = False
 
688
    
 
689
    parser = OptionParser(version = "%%prog %s" % version)
541
690
    parser.add_option("-i", "--interface", type="string",
542
 
                      default=None, metavar="IF",
543
 
                      help="Bind to interface IF")
544
 
    parser.add_option("--cert", type="string", default="cert.pem",
545
 
                      metavar="FILE",
546
 
                      help="Public key certificate PEM file to use")
547
 
    parser.add_option("--key", type="string", default="key.pem",
548
 
                      metavar="FILE",
549
 
                      help="Private key PEM file to use")
550
 
    parser.add_option("--ca", type="string", default="ca.pem",
551
 
                      metavar="FILE",
552
 
                      help="Certificate Authority certificate PEM file to use")
553
 
    parser.add_option("--crl", type="string", default="crl.pem",
554
 
                      metavar="FILE",
555
 
                      help="Certificate Revokation List PEM file to use")
556
 
    parser.add_option("-p", "--port", type="int", default=None,
 
691
                      metavar="IF", help="Bind to interface IF")
 
692
    parser.add_option("-a", "--address", type="string",
 
693
                      help="Address to listen for requests on")
 
694
    parser.add_option("-p", "--port", type="int",
557
695
                      help="Port number to receive requests on")
558
 
    parser.add_option("--timeout", type="string", # Parsed later
559
 
                      default="1h",
560
 
                      help="Amount of downtime allowed for clients")
561
 
    parser.add_option("--interval", type="string", # Parsed later
562
 
                      default="5m",
563
 
                      help="How often to check that a client is up")
564
696
    parser.add_option("--check", action="store_true", default=False,
565
697
                      help="Run self-test")
566
 
    parser.add_option("--debug", action="store_true", default=False,
567
 
                      help="Debug mode")
 
698
    parser.add_option("--debug", action="store_true",
 
699
                      help="Debug mode; run in foreground and log to"
 
700
                      " terminal")
 
701
    parser.add_option("--priority", type="string", help="GnuTLS"
 
702
                      " priority string (see GnuTLS documentation)")
 
703
    parser.add_option("--servicename", type="string", metavar="NAME",
 
704
                      help="Zeroconf service name")
 
705
    parser.add_option("--configdir", type="string",
 
706
                      default="/etc/mandos", metavar="DIR",
 
707
                      help="Directory to search for configuration"
 
708
                      " files")
568
709
    (options, args) = parser.parse_args()
569
710
    
570
711
    if options.check:
572
713
        doctest.testmod()
573
714
        sys.exit()
574
715
    
575
 
    # Parse the time arguments
576
 
    try:
577
 
        options.timeout = string_to_delta(options.timeout)
578
 
    except ValueError:
579
 
        parser.error("option --timeout: Unparseable time")
580
 
    try:
581
 
        options.interval = string_to_delta(options.interval)
582
 
    except ValueError:
583
 
        parser.error("option --interval: Unparseable time")
584
 
    
585
 
    # Parse config file
586
 
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
587
 
    client_config = ConfigParser.SafeConfigParser(defaults)
588
 
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
589
 
    client_config.read("mandos-clients.conf")
590
 
    
591
 
    # From the Avahi server example code
 
716
    # Default values for config file for server-global settings
 
717
    server_defaults = { "interface": "",
 
718
                        "address": "",
 
719
                        "port": "",
 
720
                        "debug": "False",
 
721
                        "priority":
 
722
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
723
                        "servicename": "Mandos",
 
724
                        }
 
725
    
 
726
    # Parse config file for server-global settings
 
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
728
    del server_defaults
 
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
730
    # Convert the SafeConfigParser object to a dict
 
731
    server_settings = server_config.defaults()
 
732
    # Use getboolean on the boolean config option
 
733
    server_settings["debug"] = server_config.getboolean\
 
734
                               ("DEFAULT", "debug")
 
735
    del server_config
 
736
    
 
737
    # Override the settings from the config file with command line
 
738
    # options, if set.
 
739
    for option in ("interface", "address", "port", "debug",
 
740
                   "priority", "servicename", "configdir"):
 
741
        value = getattr(options, option)
 
742
        if value is not None:
 
743
            server_settings[option] = value
 
744
    del options
 
745
    # Now we have our good server settings in "server_settings"
 
746
    
 
747
    debug = server_settings["debug"]
 
748
    
 
749
    if not debug:
 
750
        syslogger.setLevel(logging.WARNING)
 
751
        console.setLevel(logging.WARNING)
 
752
    
 
753
    if server_settings["servicename"] != "Mandos":
 
754
        syslogger.setFormatter(logging.Formatter\
 
755
                               ('Mandos (%s): %%(levelname)s:'
 
756
                                ' %%(message)s'
 
757
                                % server_settings["servicename"]))
 
758
    
 
759
    # Parse config file with clients
 
760
    client_defaults = { "timeout": "1h",
 
761
                        "interval": "5m",
 
762
                        "checker": "fping -q -- %(host)s",
 
763
                        "host": "",
 
764
                        }
 
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
766
    client_config.read(os.path.join(server_settings["configdir"],
 
767
                                    "clients.conf"))
 
768
    
 
769
    clients = Set()
 
770
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
771
                                 server_settings["port"]),
 
772
                                tcp_handler,
 
773
                                settings=server_settings,
 
774
                                clients=clients)
 
775
    pidfilename = "/var/run/mandos.pid"
 
776
    try:
 
777
        pidfile = open(pidfilename, "w")
 
778
    except IOError, error:
 
779
        logger.error("Could not open file %r", pidfilename)
 
780
    
 
781
    uid = 65534
 
782
    gid = 65534
 
783
    try:
 
784
        uid = pwd.getpwnam("mandos").pw_uid
 
785
    except KeyError:
 
786
        try:
 
787
            uid = pwd.getpwnam("nobody").pw_uid
 
788
        except KeyError:
 
789
            pass
 
790
    try:
 
791
        gid = pwd.getpwnam("mandos").pw_gid
 
792
    except KeyError:
 
793
        try:
 
794
            gid = pwd.getpwnam("nogroup").pw_gid
 
795
        except KeyError:
 
796
            pass
 
797
    try:
 
798
        os.setuid(uid)
 
799
        os.setgid(gid)
 
800
    except OSError, error:
 
801
        if error[0] != errno.EPERM:
 
802
            raise error
 
803
    
 
804
    global service
 
805
    service = AvahiService(name = server_settings["servicename"],
 
806
                           type = "_mandos._tcp", );
 
807
    if server_settings["interface"]:
 
808
        service.interface = if_nametoindex\
 
809
                            (server_settings["interface"])
 
810
    
 
811
    global main_loop
 
812
    global bus
 
813
    global server
 
814
    # From the Avahi example code
592
815
    DBusGMainLoop(set_as_default=True )
593
816
    main_loop = gobject.MainLoop()
594
817
    bus = dbus.SystemBus()
595
 
    server = dbus.Interface(
596
 
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
597
 
            avahi.DBUS_INTERFACE_SERVER )
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
598
821
    # End of Avahi example code
599
822
    
600
 
    debug = options.debug
601
 
    
602
 
    clients = Set()
603
823
    def remove_from_clients(client):
604
824
        clients.remove(client)
605
825
        if not clients:
606
 
            if debug:
607
 
                sys.stderr.write(u"No clients left, exiting\n")
608
 
            main_loop.quit()
 
826
            logger.critical(u"No clients left, exiting")
 
827
            sys.exit()
609
828
    
610
 
    clients.update(Set(Client(name=section, options=options,
 
829
    clients.update(Set(Client(name = section,
611
830
                              stop_hook = remove_from_clients,
612
 
                              **(dict(client_config\
613
 
                                      .items(section))))
 
831
                              config
 
832
                              = dict(client_config.items(section)))
614
833
                       for section in client_config.sections()))
 
834
    if not clients:
 
835
        logger.critical(u"No clients defined")
 
836
        sys.exit(1)
 
837
    
 
838
    if debug:
 
839
        # Redirect stdin so all checkers get /dev/null
 
840
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
841
        os.dup2(null, sys.stdin.fileno())
 
842
        if null > 2:
 
843
            os.close(null)
 
844
    else:
 
845
        # No console logging
 
846
        logger.removeHandler(console)
 
847
        # Close all input and output, do double fork, etc.
 
848
        daemon()
 
849
    
 
850
    try:
 
851
        pid = os.getpid()
 
852
        pidfile.write(str(pid) + "\n")
 
853
        pidfile.close()
 
854
        del pidfile
 
855
    except IOError, err:
 
856
        logger.error(u"Could not write to file %r with PID %d",
 
857
                     pidfilename, pid)
 
858
    except NameError:
 
859
        # "pidfile" was never created
 
860
        pass
 
861
    del pidfilename
 
862
    
 
863
    def cleanup():
 
864
        "Cleanup function; run on exit"
 
865
        global group
 
866
        # From the Avahi example code
 
867
        if not group is None:
 
868
            group.Free()
 
869
            group = None
 
870
        # End of Avahi example code
 
871
        
 
872
        while clients:
 
873
            client = clients.pop()
 
874
            client.stop_hook = None
 
875
            client.stop()
 
876
    
 
877
    atexit.register(cleanup)
 
878
    
 
879
    if not debug:
 
880
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
881
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
882
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
883
    
615
884
    for client in clients:
616
885
        client.start()
617
886
    
618
 
    tcp_server = IPv6_TCPServer((None, options.port),
619
 
                                tcp_handler,
620
 
                                options=options,
621
 
                                clients=clients)
622
 
    # Find out what random port we got
623
 
    servicePort = tcp_server.socket.getsockname()[1]
624
 
    if debug:
625
 
        sys.stderr.write(u"Now listening on port %d\n" % servicePort)
626
 
    
627
 
    if options.interface is not None:
628
 
        serviceInterface = if_nametoindex(options.interface)
629
 
    
630
 
    # From the Avahi server example code
631
 
    server.connect_to_signal("StateChanged", server_state_changed)
632
 
    server_state_changed(server.GetState())
633
 
    # End of Avahi example code
634
 
    
635
 
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
636
 
                         lambda *args, **kwargs:
637
 
                         tcp_server.handle_request(*args[2:],
638
 
                                                   **kwargs) or True)
 
887
    tcp_server.enable()
 
888
    tcp_server.server_activate()
 
889
    
 
890
    # Find out what port we got
 
891
    service.port = tcp_server.socket.getsockname()[1]
 
892
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
893
                u" scope_id %d" % tcp_server.socket.getsockname())
 
894
    
 
895
    #service.interface = tcp_server.socket.getsockname()[3]
 
896
    
639
897
    try:
 
898
        # From the Avahi example code
 
899
        server.connect_to_signal("StateChanged", server_state_changed)
 
900
        try:
 
901
            server_state_changed(server.GetState())
 
902
        except dbus.exceptions.DBusException, error:
 
903
            logger.critical(u"DBusException: %s", error)
 
904
            sys.exit(1)
 
905
        # End of Avahi example code
 
906
        
 
907
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
908
                             lambda *args, **kwargs:
 
909
                             tcp_server.handle_request\
 
910
                             (*args[2:], **kwargs) or True)
 
911
        
 
912
        logger.debug(u"Starting main loop")
 
913
        main_loop_started = True
640
914
        main_loop.run()
 
915
    except AvahiError, error:
 
916
        logger.critical(u"AvahiError: %s" + unicode(error))
 
917
        sys.exit(1)
641
918
    except KeyboardInterrupt:
642
 
        print
643
 
    
644
 
    # Cleanup here
 
919
        if debug:
 
920
            print
645
921
 
646
 
    # From the Avahi server example code
647
 
    if not group is None:
648
 
        group.Free()
649
 
    # End of Avahi example code
650
 
    
651
 
    for client in clients:
652
 
        client.stop_hook = None
653
 
        client.stop()
 
922
if __name__ == '__main__':
 
923
    main()