/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to server.py

  • Committer: Björn Påhlsson
  • Date: 2008-07-20 02:52:20 UTC
  • Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
       Avahi instead of udp server discovery
       openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server

Show diffs side-by-side

added added

removed removed

Lines of Context:
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 © 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
 
32
2
 
33
3
from __future__ import division
34
4
 
35
5
import SocketServer
36
6
import socket
 
7
import select
37
8
from optparse import OptionParser
38
9
import datetime
39
10
import errno
50
21
import signal
51
22
from sets import Set
52
23
import subprocess
53
 
import atexit
54
 
import stat
55
 
import logging
56
 
import logging.handlers
57
 
import pwd
58
24
 
59
25
import dbus
60
26
import gobject
61
27
import avahi
62
28
from dbus.mainloop.glib import DBusGMainLoop
63
29
import ctypes
64
 
import ctypes.util
65
 
 
66
 
version = "1.0"
 
30
 
 
31
import logging
 
32
import logging.handlers
 
33
 
 
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
67
35
 
68
36
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
 
        super(AvahiError, self).__init__()
85
 
    def __str__(self):
86
 
        return repr(self.value)
87
 
 
88
 
class AvahiServiceError(AvahiError):
89
 
    pass
90
 
 
91
 
class AvahiGroupError(AvahiError):
92
 
    pass
93
 
 
94
 
 
95
 
class AvahiService(object):
96
 
    """An Avahi (Zeroconf) service.
97
 
    Attributes:
98
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
99
 
               Used to optionally bind to the specified interface.
100
 
    name: string; Example: 'Mandos'
101
 
    type: string; Example: '_mandos._tcp'.
102
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
103
 
    port: integer; what port to announce
104
 
    TXT: list of strings; TXT record for the service
105
 
    domain: string; Domain to publish on, default to .local if empty.
106
 
    host: string; Host to publish records for, default is localhost
107
 
    max_renames: integer; maximum number of renames
108
 
    rename_count: integer; counter so we only rename after collisions
109
 
                  a sensible number of times
110
 
    """
111
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
 
                 servicetype = None, port = None, TXT = None, domain = "",
113
 
                 host = "", max_renames = 32768):
114
 
        self.interface = interface
115
 
        self.name = name
116
 
        self.type = servicetype
117
 
        self.port = port
118
 
        if TXT is None:
119
 
            self.TXT = []
120
 
        else:
121
 
            self.TXT = TXT
122
 
        self.domain = domain
123
 
        self.host = host
124
 
        self.rename_count = 0
125
 
        self.max_renames = max_renames
126
 
    def rename(self):
127
 
        """Derived from the Avahi example code"""
128
 
        if self.rename_count >= self.max_renames:
129
 
            logger.critical(u"No suitable Zeroconf service name found"
130
 
                            u" after %i retries, exiting.",
131
 
                            self.rename_count)
132
 
            raise AvahiServiceError("Too many renames")
133
 
        self.name = server.GetAlternativeServiceName(self.name)
134
 
        logger.info(u"Changing Zeroconf service name to %r ...",
135
 
                    str(self.name))
136
 
        syslogger.setFormatter(logging.Formatter\
137
 
                               ('Mandos (%s): %%(levelname)s:'
138
 
                               ' %%(message)s' % self.name))
139
 
        self.remove()
140
 
        self.add()
141
 
        self.rename_count += 1
142
 
    def remove(self):
143
 
        """Derived from the Avahi example code"""
144
 
        if group is not None:
145
 
            group.Reset()
146
 
    def add(self):
147
 
        """Derived from the Avahi example code"""
148
 
        global group
149
 
        if group is None:
150
 
            group = dbus.Interface\
151
 
                    (bus.get_object(avahi.DBUS_NAME,
152
 
                                    server.EntryGroupNew()),
153
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
 
            group.connect_to_signal('StateChanged',
155
 
                                    entry_group_state_changed)
156
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
 
                     service.name, service.type)
158
 
        group.AddService(
159
 
                self.interface,         # interface
160
 
                avahi.PROTO_INET6,      # protocol
161
 
                dbus.UInt32(0),         # flags
162
 
                self.name, self.type,
163
 
                self.domain, self.host,
164
 
                dbus.UInt16(self.port),
165
 
                avahi.string_array_to_txt_array(self.TXT))
166
 
        group.Commit()
167
 
 
168
 
# From the Avahi example code:
169
 
group = None                            # our entry group
 
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
 
38
 
 
39
# This variable is used to optionally bind to a specified interface.
 
40
# It is a global variable to fit in with the other variables from the
 
41
# Avahi server example code.
 
42
serviceInterface = avahi.IF_UNSPEC
 
43
# From the Avahi server example code:
 
44
serviceName = "Mandos"
 
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
46
servicePort = None                      # Not known at startup
 
47
serviceTXT = []                         # TXT record for the service
 
48
domain = ""                  # Domain to publish on, default to .local
 
49
host = ""          # Host to publish records for, default to localhost
 
50
group = None #our entry group
 
51
rename_count = 12       # Counter so we only rename after collisions a
 
52
                        # sensible number of times
170
53
# End of Avahi example code
171
54
 
172
55
 
177
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
178
61
                 uniquely identify the client
179
62
    secret:    bytestring; sent verbatim (over TLS) to client
180
 
    host:      string; available for use by the checker command
181
 
    created:   datetime.datetime(); object creation, not client host
182
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
183
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
184
 
                                     until this client is invalid
 
63
    fqdn:      string (FQDN); available for use by the checker command
 
64
    created:   datetime.datetime()
 
65
    last_seen: datetime.datetime() or None if not yet seen
 
66
    timeout:   datetime.timedelta(); How long from last_seen until
 
67
                                     this client is invalid
185
68
    interval:  datetime.timedelta(); How often to start a new checker
186
69
    stop_hook: If set, called by stop() as stop_hook(self)
187
70
    checker:   subprocess.Popen(); a running checker process used
188
71
                                   to see if the client lives.
189
 
                                   'None' if no process is running.
 
72
                                   Is None if no process is running.
190
73
    checker_initiator_tag: a gobject event source tag, or None
191
74
    stop_initiator_tag:    - '' -
192
75
    checker_callback_tag:  - '' -
193
76
    checker_command: string; External command which is run to check if
194
 
                     client lives.  %() expansions are done at
 
77
                     client lives.  %()s expansions are done at
195
78
                     runtime with vars(self) as dict, so that for
196
79
                     instance %(name)s can be used in the command.
197
80
    Private attibutes:
198
81
    _timeout: Real variable for 'timeout'
199
82
    _interval: Real variable for 'interval'
200
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
83
    _timeout_milliseconds: Used by gobject.timeout_add()
201
84
    _interval_milliseconds: - '' -
202
85
    """
203
86
    def _set_timeout(self, timeout):
223
106
    interval = property(lambda self: self._interval,
224
107
                        _set_interval)
225
108
    del _set_interval
226
 
    def __init__(self, name = None, stop_hook=None, config=None):
227
 
        """Note: the 'checker' key in 'config' sets the
228
 
        'checker_command' attribute and *not* the 'checker'
229
 
        attribute."""
230
 
        if config is None:
231
 
            config = {}
 
109
    def __init__(self, name=None, options=None, stop_hook=None,
 
110
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
111
                 timeout=None, interval=-1, checker=None):
232
112
        self.name = name
233
 
        logger.debug(u"Creating client %r", self.name)
234
 
        # Uppercase and remove spaces from fingerprint for later
235
 
        # comparison purposes with return value from the fingerprint()
236
 
        # function
237
 
        self.fingerprint = config["fingerprint"].upper()\
238
 
                           .replace(u" ", u"")
239
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
240
 
        if "secret" in config:
241
 
            self.secret = config["secret"].decode(u"base64")
242
 
        elif "secfile" in config:
243
 
            secfile = open(config["secfile"])
244
 
            self.secret = secfile.read()
245
 
            secfile.close()
 
113
        # Uppercase and remove spaces from fingerprint
 
114
        # for later comparison purposes with return value of
 
115
        # the fingerprint() function
 
116
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
117
        if secret:
 
118
            self.secret = secret.decode(u"base64")
 
119
        elif secfile:
 
120
            sf = open(secfile)
 
121
            self.secret = sf.read()
 
122
            sf.close()
246
123
        else:
247
 
            raise TypeError(u"No secret or secfile for client %s"
248
 
                            % self.name)
249
 
        self.host = config.get("host", "")
 
124
            raise RuntimeError(u"No secret or secfile for client %s"
 
125
                               % self.name)
 
126
        self.fqdn = fqdn                # string
250
127
        self.created = datetime.datetime.now()
251
 
        self.last_checked_ok = None
252
 
        self.timeout = string_to_delta(config["timeout"])
253
 
        self.interval = string_to_delta(config["interval"])
 
128
        self.last_seen = None
 
129
        if timeout is None:
 
130
            timeout = options.timeout
 
131
        self.timeout = timeout
 
132
        if interval == -1:
 
133
            interval = options.interval
 
134
        else:
 
135
            interval = string_to_delta(interval)
 
136
        self.interval = interval
254
137
        self.stop_hook = stop_hook
255
138
        self.checker = None
256
139
        self.checker_initiator_tag = None
257
140
        self.stop_initiator_tag = None
258
141
        self.checker_callback_tag = None
259
 
        self.check_command = config["checker"]
 
142
        self.check_command = checker
260
143
    def start(self):
261
 
        """Start this client's checker and timeout hooks"""
 
144
        """Start this clients checker and timeout hooks"""
262
145
        # Schedule a new checker to be started an 'interval' from now,
263
146
        # and every interval from then on.
264
147
        self.checker_initiator_tag = gobject.timeout_add\
272
155
                                   self.stop)
273
156
    def stop(self):
274
157
        """Stop this client.
275
 
        The possibility that a client might be restarted is left open,
276
 
        but not currently used."""
277
 
        # If this client doesn't have a secret, it is already stopped.
278
 
        if hasattr(self, "secret") and self.secret:
279
 
            logger.info(u"Stopping client %s", self.name)
280
 
            self.secret = None
281
 
        else:
282
 
            return False
283
 
        if getattr(self, "stop_initiator_tag", False):
 
158
        The possibility that this client might be restarted is left
 
159
        open, but not currently used."""
 
160
        logger.debug(u"Stopping client %s", self.name)
 
161
        self.secret = None
 
162
        if self.stop_initiator_tag:
284
163
            gobject.source_remove(self.stop_initiator_tag)
285
164
            self.stop_initiator_tag = None
286
 
        if getattr(self, "checker_initiator_tag", False):
 
165
        if self.checker_initiator_tag:
287
166
            gobject.source_remove(self.checker_initiator_tag)
288
167
            self.checker_initiator_tag = None
289
168
        self.stop_checker()
292
171
        # Do not run this again if called by a gobject.timeout_add
293
172
        return False
294
173
    def __del__(self):
295
 
        self.stop_hook = None
296
 
        self.stop()
 
174
        # Some code duplication here and in stop()
 
175
        if hasattr(self, "stop_initiator_tag") \
 
176
               and self.stop_initiator_tag:
 
177
            gobject.source_remove(self.stop_initiator_tag)
 
178
            self.stop_initiator_tag = None
 
179
        if hasattr(self, "checker_initiator_tag") \
 
180
               and self.checker_initiator_tag:
 
181
            gobject.source_remove(self.checker_initiator_tag)
 
182
            self.checker_initiator_tag = None
 
183
        self.stop_checker()
297
184
    def checker_callback(self, pid, condition):
298
185
        """The checker has completed, so take appropriate actions."""
299
186
        now = datetime.datetime.now()
300
 
        self.checker_callback_tag = None
301
 
        self.checker = None
302
187
        if os.WIFEXITED(condition) \
303
188
               and (os.WEXITSTATUS(condition) == 0):
304
 
            logger.info(u"Checker for %(name)s succeeded",
305
 
                        vars(self))
306
 
            self.last_checked_ok = now
 
189
            logger.debug(u"Checker for %(name)s succeeded",
 
190
                         vars(self))
 
191
            self.last_seen = now
307
192
            gobject.source_remove(self.stop_initiator_tag)
308
193
            self.stop_initiator_tag = gobject.timeout_add\
309
194
                                      (self._timeout_milliseconds,
310
195
                                       self.stop)
311
 
        elif not os.WIFEXITED(condition):
 
196
        if not os.WIFEXITED(condition):
312
197
            logger.warning(u"Checker for %(name)s crashed?",
313
198
                           vars(self))
314
199
        else:
315
 
            logger.info(u"Checker for %(name)s failed",
316
 
                        vars(self))
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
317
204
    def start_checker(self):
318
205
        """Start a new checker subprocess if one is not running.
319
206
        If a checker already exists, leave it running and do
320
207
        nothing."""
321
 
        # The reason for not killing a running checker is that if we
322
 
        # did that, then if a checker (for some reason) started
323
 
        # running slowly and taking more than 'interval' time, the
324
 
        # client would inevitably timeout, since no checker would get
325
 
        # a chance to run to completion.  If we instead leave running
326
 
        # checkers alone, the checker would have to take more time
327
 
        # than 'timeout' for the client to be declared invalid, which
328
 
        # is as it should be.
329
208
        if self.checker is None:
 
209
            logger.debug(u"Starting checker for %s",
 
210
                         self.name)
330
211
            try:
331
 
                # In case check_command has exactly one % operator
332
 
                command = self.check_command % self.host
 
212
                command = self.check_command % self.fqdn
333
213
            except TypeError:
334
 
                # Escape attributes for the shell
335
214
                escaped_attrs = dict((key, re.escape(str(val)))
336
215
                                     for key, val in
337
216
                                     vars(self).iteritems())
338
217
                try:
339
218
                    command = self.check_command % escaped_attrs
340
219
                except TypeError, error:
341
 
                    logger.error(u'Could not format string "%s":'
342
 
                                 u' %s', self.check_command, error)
 
220
                    logger.critical(u'Could not format string "%s": %s',
 
221
                                    self.check_command, error)
343
222
                    return True # Try again later
344
223
            try:
345
 
                logger.info(u"Starting checker %r for %s",
346
 
                            command, self.name)
347
 
                # We don't need to redirect stdout and stderr, since
348
 
                # in normal mode, that is already done by daemon(),
349
 
                # and in debug mode we don't want to.  (Stdin is
350
 
                # always replaced by /dev/null.)
351
 
                self.checker = subprocess.Popen(command,
352
 
                                                close_fds=True,
353
 
                                                shell=True, cwd="/")
354
 
                self.checker_callback_tag = gobject.child_watch_add\
355
 
                                            (self.checker.pid,
356
 
                                             self.checker_callback)
357
 
            except OSError, error:
 
224
                self.checker = subprocess.\
 
225
                               Popen(command,
 
226
                                     stdout=subprocess.PIPE,
 
227
                                     close_fds=True, shell=True,
 
228
                                     cwd="/")
 
229
                self.checker_callback_tag = gobject.\
 
230
                                            child_watch_add(self.checker.pid,
 
231
                                                            self.\
 
232
                                                            checker_callback)
 
233
            except subprocess.OSError, error:
358
234
                logger.error(u"Failed to start subprocess: %s",
359
235
                             error)
360
236
        # Re-run this periodically if run by gobject.timeout_add
361
237
        return True
362
238
    def stop_checker(self):
363
239
        """Force the checker process, if any, to stop."""
364
 
        if self.checker_callback_tag:
365
 
            gobject.source_remove(self.checker_callback_tag)
366
 
            self.checker_callback_tag = None
367
 
        if getattr(self, "checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
368
241
            return
369
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
370
 
        try:
371
 
            os.kill(self.checker.pid, signal.SIGTERM)
372
 
            #os.sleep(0.5)
373
 
            #if self.checker.poll() is None:
374
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
375
 
        except OSError, error:
376
 
            if error.errno != errno.ESRCH: # No such process
377
 
                raise
 
242
        gobject.source_remove(self.checker_callback_tag)
 
243
        self.checker_callback_tag = None
 
244
        os.kill(self.checker.pid, signal.SIGTERM)
 
245
        if self.checker.poll() is None:
 
246
            os.kill(self.checker.pid, signal.SIGKILL)
378
247
        self.checker = None
379
 
    def still_valid(self):
 
248
    def still_valid(self, now=None):
380
249
        """Has the timeout not yet passed for this client?"""
381
 
        now = datetime.datetime.now()
382
 
        if self.last_checked_ok is None:
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
383
253
            return now < (self.created + self.timeout)
384
254
        else:
385
 
            return now < (self.last_checked_ok + self.timeout)
 
255
            return now < (self.last_seen + self.timeout)
386
256
 
387
257
 
388
258
def peer_certificate(session):
389
 
    "Return the peer's OpenPGP certificate as a bytestring"
390
259
    # If not an OpenPGP certificate...
391
260
    if gnutls.library.functions.gnutls_certificate_type_get\
392
261
            (session._c_object) \
403
272
 
404
273
 
405
274
def fingerprint(openpgp):
406
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
275
    # New empty GnuTLS certificate
 
276
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
277
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
278
        (ctypes.byref(crt))
407
279
    # New GnuTLS "datum" with the OpenPGP public key
408
280
    datum = gnutls.library.types.gnutls_datum_t\
409
281
        (ctypes.cast(ctypes.c_char_p(openpgp),
410
282
                     ctypes.POINTER(ctypes.c_ubyte)),
411
283
         ctypes.c_uint(len(openpgp)))
412
 
    # New empty GnuTLS certificate
413
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
415
 
        (ctypes.byref(crt))
416
284
    # Import the OpenPGP public key into the certificate
417
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
418
 
                    (crt, ctypes.byref(datum),
419
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
 
    # Verify the self signature in the key
421
 
    crtverify = ctypes.c_uint()
422
 
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
 
        (crt, 0, ctypes.byref(crtverify))
424
 
    if crtverify.value != 0:
425
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
285
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
286
        (crt,
 
287
         ctypes.byref(datum),
 
288
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
427
289
    # New buffer for the fingerprint
428
 
    buf = ctypes.create_string_buffer(20)
429
 
    buf_len = ctypes.c_size_t()
 
290
    buffer = ctypes.create_string_buffer(20)
 
291
    buffer_length = ctypes.c_size_t()
430
292
    # Get the fingerprint from the certificate into the buffer
431
293
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
432
 
        (crt, ctypes.byref(buf), ctypes.byref(buf_len))
 
294
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
433
295
    # Deinit the certificate
434
296
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
435
297
    # Convert the buffer to a Python bytestring
436
 
    fpr = ctypes.string_at(buf, buf_len.value)
 
298
    fpr = ctypes.string_at(buffer, buffer_length.value)
437
299
    # Convert the bytestring to hexadecimal notation
438
300
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
439
301
    return hex_fpr
440
302
 
441
303
 
442
 
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
443
305
    """A TCP request handler class.
444
306
    Instantiated by IPv6_TCPServer for each request to handle it.
445
307
    Note: This will run in its own forked process."""
446
308
    
447
309
    def handle(self):
448
 
        logger.info(u"TCP connection from: %s",
 
310
        logger.debug(u"TCP connection from: %s",
449
311
                     unicode(self.client_address))
450
 
        session = gnutls.connection.ClientSession\
451
 
                  (self.request, gnutls.connection.X509Credentials())
452
 
        
453
 
        line = self.request.makefile().readline()
454
 
        logger.debug(u"Protocol version: %r", line)
455
 
        try:
456
 
            if int(line.strip().split()[0]) > 1:
457
 
                raise RuntimeError
458
 
        except (ValueError, IndexError, RuntimeError), error:
459
 
            logger.error(u"Unknown protocol version: %s", error)
460
 
            return
461
 
        
462
 
        # Note: gnutls.connection.X509Credentials is really a generic
463
 
        # GnuTLS certificate credentials object so long as no X.509
464
 
        # keys are added to it.  Therefore, we can use it here despite
465
 
        # using OpenPGP certificates.
 
312
        session = gnutls.connection.ClientSession(self.request,
 
313
                                                  gnutls.connection.\
 
314
                                                  X509Credentials())
466
315
        
467
316
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
468
317
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
469
318
        #                "+DHE-DSS"))
470
 
        priority = "NORMAL"             # Fallback default, since this
471
 
                                        # MUST be set.
472
 
        if self.server.settings["priority"]:
473
 
            priority = self.server.settings["priority"]
 
319
        priority = "SECURE256"
 
320
        
474
321
        gnutls.library.functions.gnutls_priority_set_direct\
475
 
            (session._c_object, priority, None)
 
322
            (session._c_object, priority, None);
476
323
        
477
324
        try:
478
325
            session.handshake()
479
326
        except gnutls.errors.GNUTLSError, error:
480
 
            logger.warning(u"Handshake failed: %s", error)
 
327
            logger.debug(u"Handshake failed: %s", error)
481
328
            # Do not run session.bye() here: the session is not
482
329
            # established.  Just abandon the request.
483
330
            return
484
331
        try:
485
332
            fpr = fingerprint(peer_certificate(session))
486
333
        except (TypeError, gnutls.errors.GNUTLSError), error:
487
 
            logger.warning(u"Bad certificate: %s", error)
 
334
            logger.debug(u"Bad certificate: %s", error)
488
335
            session.bye()
489
336
            return
490
337
        logger.debug(u"Fingerprint: %s", fpr)
491
338
        client = None
492
 
        for c in self.server.clients:
 
339
        for c in clients:
493
340
            if c.fingerprint == fpr:
494
341
                client = c
495
342
                break
496
 
        if not client:
497
 
            logger.warning(u"Client not found for fingerprint: %s",
498
 
                           fpr)
499
 
            session.bye()
500
 
            return
501
343
        # Have to check if client.still_valid(), since it is possible
502
344
        # that the client timed out while establishing the GnuTLS
503
345
        # session.
504
 
        if not client.still_valid():
505
 
            logger.warning(u"Client %(name)s is invalid",
506
 
                           vars(client))
 
346
        if (not client) or (not client.still_valid()):
 
347
            if client:
 
348
                logger.debug(u"Client %(name)s is invalid",
 
349
                             vars(client))
 
350
            else:
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
507
353
            session.bye()
508
354
            return
509
355
        sent_size = 0
519
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
520
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
521
367
    Attributes:
522
 
        settings:       Server settings
 
368
        options:        Command line options
523
369
        clients:        Set() of Client objects
524
 
        enabled:        Boolean; whether this server is activated yet
525
370
    """
526
371
    address_family = socket.AF_INET6
527
372
    def __init__(self, *args, **kwargs):
528
 
        if "settings" in kwargs:
529
 
            self.settings = kwargs["settings"]
530
 
            del kwargs["settings"]
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
531
376
        if "clients" in kwargs:
532
377
            self.clients = kwargs["clients"]
533
378
            del kwargs["clients"]
534
 
        self.enabled = False
535
 
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
 
379
        return super(type(self), self).__init__(*args, **kwargs)
536
380
    def server_bind(self):
537
381
        """This overrides the normal server_bind() function
538
382
        to bind to an interface if one was specified, and also NOT to
539
383
        bind to an address or port if they were not specified."""
540
 
        if self.settings["interface"]:
541
 
            # 25 is from /usr/include/asm-i486/socket.h
542
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
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
543
388
            try:
544
389
                self.socket.setsockopt(socket.SOL_SOCKET,
545
 
                                       SO_BINDTODEVICE,
546
 
                                       self.settings["interface"])
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
547
392
            except socket.error, error:
548
393
                if error[0] == errno.EPERM:
549
 
                    logger.error(u"No permission to"
550
 
                                 u" bind to interface %s",
551
 
                                 self.settings["interface"])
 
394
                    logger.warning(u"No permission to"
 
395
                                   u" bind to interface %s",
 
396
                                   self.options.interface)
552
397
                else:
553
398
                    raise error
554
399
        # Only bind(2) the socket if we really need to.
557
402
                in6addr_any = "::"
558
403
                self.server_address = (in6addr_any,
559
404
                                       self.server_address[1])
560
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
561
406
                self.server_address = (self.server_address[0],
562
407
                                       0)
563
 
#                 if self.settings["interface"]:
564
 
#                     self.server_address = (self.server_address[0],
565
 
#                                            0, # port
566
 
#                                            0, # flowinfo
567
 
#                                            if_nametoindex
568
 
#                                            (self.settings
569
 
#                                             ["interface"]))
570
 
            return super(IPv6_TCPServer, self).server_bind()
571
 
    def server_activate(self):
572
 
        if self.enabled:
573
 
            return super(IPv6_TCPServer, self).server_activate()
574
 
    def enable(self):
575
 
        self.enabled = True
 
408
            return super(type(self), self).server_bind()
576
409
 
577
410
 
578
411
def string_to_delta(interval):
588
421
    datetime.timedelta(1)
589
422
    >>> string_to_delta(u'1w')
590
423
    datetime.timedelta(7)
591
 
    >>> string_to_delta('5m 30s')
592
 
    datetime.timedelta(0, 330)
593
424
    """
594
 
    timevalue = datetime.timedelta(0)
595
 
    for s in interval.split():
596
 
        try:
597
 
            suffix = unicode(s[-1])
598
 
            value = int(s[:-1])
599
 
            if suffix == u"d":
600
 
                delta = datetime.timedelta(value)
601
 
            elif suffix == u"s":
602
 
                delta = datetime.timedelta(0, value)
603
 
            elif suffix == u"m":
604
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
605
 
            elif suffix == u"h":
606
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
607
 
            elif suffix == u"w":
608
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
609
 
            else:
610
 
                raise ValueError
611
 
        except (ValueError, IndexError):
 
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:
612
439
            raise ValueError
613
 
        timevalue += delta
614
 
    return timevalue
 
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
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
457
                 serviceName, serviceType)
 
458
    
 
459
    group.AddService(
 
460
            serviceInterface,           # interface
 
461
            avahi.PROTO_INET6,          # protocol
 
462
            dbus.UInt32(0),             # flags
 
463
            serviceName, serviceType,
 
464
            domain, host,
 
465
            dbus.UInt16(servicePort),
 
466
            avahi.string_array_to_txt_array(serviceTXT))
 
467
    group.Commit()
 
468
 
 
469
 
 
470
def remove_service():
 
471
    """From the Avahi server example code"""
 
472
    global group
 
473
    
 
474
    if not group is None:
 
475
        group.Reset()
615
476
 
616
477
 
617
478
def server_state_changed(state):
618
 
    """Derived from the Avahi example code"""
 
479
    """From the Avahi server example code"""
619
480
    if state == avahi.SERVER_COLLISION:
620
 
        logger.error(u"Zeroconf server name collision")
621
 
        service.remove()
 
481
        logger.warning(u"Server name collision")
 
482
        remove_service()
622
483
    elif state == avahi.SERVER_RUNNING:
623
 
        service.add()
 
484
        add_service()
624
485
 
625
486
 
626
487
def entry_group_state_changed(state, error):
627
 
    """Derived from the Avahi example code"""
628
 
    logger.debug(u"Avahi state change: %i", state)
 
488
    """From the Avahi server example code"""
 
489
    global serviceName, server, rename_count
 
490
    
 
491
    logger.debug(u"state change: %i", state)
629
492
    
630
493
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
631
 
        logger.debug(u"Zeroconf service established.")
 
494
        logger.debug(u"Service established.")
632
495
    elif state == avahi.ENTRY_GROUP_COLLISION:
633
 
        logger.warning(u"Zeroconf service name collision.")
634
 
        service.rename()
 
496
        
 
497
        rename_count = rename_count - 1
 
498
        if rename_count > 0:
 
499
            name = server.GetAlternativeServiceName(name)
 
500
            logger.warning(u"Service name collision, "
 
501
                           u"changing name to '%s' ...", name)
 
502
            remove_service()
 
503
            add_service()
 
504
            
 
505
        else:
 
506
            logger.error(u"No suitable service name found "
 
507
                         u"after %i retries, exiting.",
 
508
                         n_rename)
 
509
            main_loop.quit()
635
510
    elif state == avahi.ENTRY_GROUP_FAILURE:
636
 
        logger.critical(u"Avahi: Error in group state changed %s",
637
 
                        unicode(error))
638
 
        raise AvahiGroupError("State changed: %s", str(error))
 
511
        logger.error(u"Error in group state changed %s",
 
512
                     unicode(error))
 
513
        main_loop.quit()
 
514
        return
 
515
 
639
516
 
640
517
def if_nametoindex(interface):
641
 
    """Call the C function if_nametoindex(), or equivalent"""
642
 
    global if_nametoindex
 
518
    """Call the C function if_nametoindex()"""
643
519
    try:
644
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
645
 
            (ctypes.util.find_library("c")).if_nametoindex
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
646
522
    except (OSError, AttributeError):
647
523
        if "struct" not in sys.modules:
648
524
            import struct
649
525
        if "fcntl" not in sys.modules:
650
526
            import fcntl
651
 
        def if_nametoindex(interface):
652
 
            "Get an interface index the hard way, i.e. using fcntl()"
653
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
654
 
            s = socket.socket()
655
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
 
                                struct.pack("16s16x", interface))
657
 
            s.close()
658
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
659
 
            return interface_index
660
 
    return if_nametoindex(interface)
661
 
 
662
 
 
663
 
def daemon(nochdir = False, noclose = False):
664
 
    """See daemon(3).  Standard BSD Unix function.
665
 
    This should really exist as os.daemon, but it doesn't (yet)."""
666
 
    if os.fork():
667
 
        sys.exit()
668
 
    os.setsid()
669
 
    if not nochdir:
670
 
        os.chdir("/")
671
 
    if os.fork():
672
 
        sys.exit()
673
 
    if not noclose:
674
 
        # Close all standard open file descriptors
675
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
676
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
677
 
            raise OSError(errno.ENODEV,
678
 
                          "/dev/null not a character device")
679
 
        os.dup2(null, sys.stdin.fileno())
680
 
        os.dup2(null, sys.stdout.fileno())
681
 
        os.dup2(null, sys.stderr.fileno())
682
 
        if null > 2:
683
 
            os.close(null)
684
 
 
685
 
 
686
 
def main():
687
 
    parser = OptionParser(version = "%%prog %s" % version)
 
527
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
528
        s = socket.socket()
 
529
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
530
                            struct.pack("16s16x", interface))
 
531
        s.close()
 
532
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
533
        return interface_index
 
534
 
 
535
 
 
536
if __name__ == '__main__':
 
537
    parser = OptionParser()
688
538
    parser.add_option("-i", "--interface", type="string",
689
 
                      metavar="IF", help="Bind to interface IF")
690
 
    parser.add_option("-a", "--address", type="string",
691
 
                      help="Address to listen for requests on")
692
 
    parser.add_option("-p", "--port", type="int",
 
539
                      default=None, metavar="IF",
 
540
                      help="Bind to interface IF")
 
541
    parser.add_option("--cert", type="string", default="cert.pem",
 
542
                      metavar="FILE",
 
543
                      help="Public key certificate PEM file to use")
 
544
    parser.add_option("--key", type="string", default="key.pem",
 
545
                      metavar="FILE",
 
546
                      help="Private key PEM file to use")
 
547
    parser.add_option("--ca", type="string", default="ca.pem",
 
548
                      metavar="FILE",
 
549
                      help="Certificate Authority certificate PEM file to use")
 
550
    parser.add_option("--crl", type="string", default="crl.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Revokation List PEM file to use")
 
553
    parser.add_option("-p", "--port", type="int", default=None,
693
554
                      help="Port number to receive requests on")
 
555
    parser.add_option("--timeout", type="string", # Parsed later
 
556
                      default="1h",
 
557
                      help="Amount of downtime allowed for clients")
 
558
    parser.add_option("--interval", type="string", # Parsed later
 
559
                      default="5m",
 
560
                      help="How often to check that a client is up")
694
561
    parser.add_option("--check", action="store_true", default=False,
695
562
                      help="Run self-test")
696
 
    parser.add_option("--debug", action="store_true",
697
 
                      help="Debug mode; run in foreground and log to"
698
 
                      " terminal")
699
 
    parser.add_option("--priority", type="string", help="GnuTLS"
700
 
                      " priority string (see GnuTLS documentation)")
701
 
    parser.add_option("--servicename", type="string", metavar="NAME",
702
 
                      help="Zeroconf service name")
703
 
    parser.add_option("--configdir", type="string",
704
 
                      default="/etc/mandos", metavar="DIR",
705
 
                      help="Directory to search for configuration"
706
 
                      " files")
707
 
    options = parser.parse_args()[0]
 
563
    parser.add_option("--debug", action="store_true", default=False,
 
564
                      help="Debug mode")
 
565
    (options, args) = parser.parse_args()
708
566
    
709
567
    if options.check:
710
568
        import doctest
711
569
        doctest.testmod()
712
570
        sys.exit()
713
571
    
714
 
    # Default values for config file for server-global settings
715
 
    server_defaults = { "interface": "",
716
 
                        "address": "",
717
 
                        "port": "",
718
 
                        "debug": "False",
719
 
                        "priority":
720
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
 
                        "servicename": "Mandos",
722
 
                        }
723
 
    
724
 
    # Parse config file for server-global settings
725
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
726
 
    del server_defaults
727
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
728
 
    # Convert the SafeConfigParser object to a dict
729
 
    server_settings = server_config.defaults()
730
 
    # Use getboolean on the boolean config option
731
 
    server_settings["debug"] = server_config.getboolean\
732
 
                               ("DEFAULT", "debug")
733
 
    del server_config
734
 
    
735
 
    # Override the settings from the config file with command line
736
 
    # options, if set.
737
 
    for option in ("interface", "address", "port", "debug",
738
 
                   "priority", "servicename", "configdir"):
739
 
        value = getattr(options, option)
740
 
        if value is not None:
741
 
            server_settings[option] = value
742
 
    del options
743
 
    # Now we have our good server settings in "server_settings"
744
 
    
745
 
    debug = server_settings["debug"]
746
 
    
747
 
    if not debug:
748
 
        syslogger.setLevel(logging.WARNING)
749
 
        console.setLevel(logging.WARNING)
750
 
    
751
 
    if server_settings["servicename"] != "Mandos":
752
 
        syslogger.setFormatter(logging.Formatter\
753
 
                               ('Mandos (%s): %%(levelname)s:'
754
 
                                ' %%(message)s'
755
 
                                % server_settings["servicename"]))
756
 
    
757
 
    # Parse config file with clients
758
 
    client_defaults = { "timeout": "1h",
759
 
                        "interval": "5m",
760
 
                        "checker": "fping -q -- %(host)s",
761
 
                        "host": "",
762
 
                        }
763
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
764
 
    client_config.read(os.path.join(server_settings["configdir"],
765
 
                                    "clients.conf"))
766
 
    
767
 
    clients = Set()
768
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
769
 
                                 server_settings["port"]),
770
 
                                TCP_handler,
771
 
                                settings=server_settings,
772
 
                                clients=clients)
773
 
    pidfilename = "/var/run/mandos.pid"
774
 
    try:
775
 
        pidfile = open(pidfilename, "w")
776
 
    except IOError, error:
777
 
        logger.error("Could not open file %r", pidfilename)
778
 
    
779
 
    uid = 65534
780
 
    gid = 65534
781
 
    try:
782
 
        uid = pwd.getpwnam("mandos").pw_uid
783
 
    except KeyError:
784
 
        try:
785
 
            uid = pwd.getpwnam("nobody").pw_uid
786
 
        except KeyError:
787
 
            pass
788
 
    try:
789
 
        gid = pwd.getpwnam("mandos").pw_gid
790
 
    except KeyError:
791
 
        try:
792
 
            gid = pwd.getpwnam("nogroup").pw_gid
793
 
        except KeyError:
794
 
            pass
795
 
    try:
796
 
        os.setuid(uid)
797
 
        os.setgid(gid)
798
 
    except OSError, error:
799
 
        if error[0] != errno.EPERM:
800
 
            raise error
801
 
    
802
 
    global service
803
 
    service = AvahiService(name = server_settings["servicename"],
804
 
                           servicetype = "_mandos._tcp", )
805
 
    if server_settings["interface"]:
806
 
        service.interface = if_nametoindex\
807
 
                            (server_settings["interface"])
808
 
    
809
 
    global main_loop
810
 
    global bus
811
 
    global server
812
 
    # From the Avahi example code
 
572
    # Parse the time arguments
 
573
    try:
 
574
        options.timeout = string_to_delta(options.timeout)
 
575
    except ValueError:
 
576
        parser.error("option --timeout: Unparseable time")
 
577
    try:
 
578
        options.interval = string_to_delta(options.interval)
 
579
    except ValueError:
 
580
        parser.error("option --interval: Unparseable time")
 
581
    
 
582
    # Parse config file
 
583
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
584
    client_config = ConfigParser.SafeConfigParser(defaults)
 
585
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
586
    client_config.read("mandos-clients.conf")
 
587
    
 
588
    # From the Avahi server example code
813
589
    DBusGMainLoop(set_as_default=True )
814
590
    main_loop = gobject.MainLoop()
815
591
    bus = dbus.SystemBus()
816
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
 
                                           avahi.DBUS_PATH_SERVER),
818
 
                            avahi.DBUS_INTERFACE_SERVER)
 
592
    server = dbus.Interface(
 
593
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
594
            avahi.DBUS_INTERFACE_SERVER )
819
595
    # End of Avahi example code
820
596
    
 
597
    debug = options.debug
 
598
    
 
599
    clients = Set()
821
600
    def remove_from_clients(client):
822
601
        clients.remove(client)
823
602
        if not clients:
824
 
            logger.critical(u"No clients left, exiting")
825
 
            sys.exit()
 
603
            logger.debug(u"No clients left, exiting")
 
604
            main_loop.quit()
826
605
    
827
 
    clients.update(Set(Client(name = section,
 
606
    clients.update(Set(Client(name=section, options=options,
828
607
                              stop_hook = remove_from_clients,
829
 
                              config
830
 
                              = dict(client_config.items(section)))
 
608
                              **(dict(client_config\
 
609
                                      .items(section))))
831
610
                       for section in client_config.sections()))
832
 
    if not clients:
833
 
        logger.critical(u"No clients defined")
834
 
        sys.exit(1)
835
 
    
836
 
    if debug:
837
 
        # Redirect stdin so all checkers get /dev/null
838
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
839
 
        os.dup2(null, sys.stdin.fileno())
840
 
        if null > 2:
841
 
            os.close(null)
842
 
    else:
843
 
        # No console logging
844
 
        logger.removeHandler(console)
845
 
        # Close all input and output, do double fork, etc.
846
 
        daemon()
847
 
    
848
 
    try:
849
 
        pid = os.getpid()
850
 
        pidfile.write(str(pid) + "\n")
851
 
        pidfile.close()
852
 
        del pidfile
853
 
    except IOError:
854
 
        logger.error(u"Could not write to file %r with PID %d",
855
 
                     pidfilename, pid)
856
 
    except NameError:
857
 
        # "pidfile" was never created
858
 
        pass
859
 
    del pidfilename
860
 
    
861
 
    def cleanup():
862
 
        "Cleanup function; run on exit"
863
 
        global group
864
 
        # From the Avahi example code
865
 
        if not group is None:
866
 
            group.Free()
867
 
            group = None
868
 
        # End of Avahi example code
869
 
        
870
 
        while clients:
871
 
            client = clients.pop()
872
 
            client.stop_hook = None
873
 
            client.stop()
874
 
    
875
 
    atexit.register(cleanup)
876
 
    
877
 
    if not debug:
878
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
879
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
880
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
881
 
    
882
611
    for client in clients:
883
612
        client.start()
884
613
    
885
 
    tcp_server.enable()
886
 
    tcp_server.server_activate()
887
 
    
888
 
    # Find out what port we got
889
 
    service.port = tcp_server.socket.getsockname()[1]
890
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
 
                u" scope_id %d" % tcp_server.socket.getsockname())
892
 
    
893
 
    #service.interface = tcp_server.socket.getsockname()[3]
894
 
    
 
614
    tcp_server = IPv6_TCPServer((None, options.port),
 
615
                                tcp_handler,
 
616
                                options=options,
 
617
                                clients=clients)
 
618
    # Find out what random port we got
 
619
    servicePort = tcp_server.socket.getsockname()[1]
 
620
    logger.debug(u"Now listening on port %d", servicePort)
 
621
    
 
622
    if options.interface is not None:
 
623
        serviceInterface = if_nametoindex(options.interface)
 
624
    
 
625
    # From the Avahi server example code
 
626
    server.connect_to_signal("StateChanged", server_state_changed)
 
627
    server_state_changed(server.GetState())
 
628
    # End of Avahi example code
 
629
    
 
630
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
631
                         lambda *args, **kwargs:
 
632
                         tcp_server.handle_request(*args[2:],
 
633
                                                   **kwargs) or True)
895
634
    try:
896
 
        # From the Avahi example code
897
 
        server.connect_to_signal("StateChanged", server_state_changed)
898
 
        try:
899
 
            server_state_changed(server.GetState())
900
 
        except dbus.exceptions.DBusException, error:
901
 
            logger.critical(u"DBusException: %s", error)
902
 
            sys.exit(1)
903
 
        # End of Avahi example code
904
 
        
905
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
906
 
                             lambda *args, **kwargs:
907
 
                             tcp_server.handle_request\
908
 
                             (*args[2:], **kwargs) or True)
909
 
        
910
 
        logger.debug(u"Starting main loop")
911
635
        main_loop.run()
912
 
    except AvahiError, error:
913
 
        logger.critical(u"AvahiError: %s" + unicode(error))
914
 
        sys.exit(1)
915
636
    except KeyboardInterrupt:
916
 
        if debug:
917
 
            print
 
637
        print
 
638
    
 
639
    # Cleanup here
918
640
 
919
 
if __name__ == '__main__':
920
 
    main()
 
641
    # From the Avahi server example code
 
642
    if not group is None:
 
643
        group.Free()
 
644
    # End of Avahi example code
 
645
    
 
646
    for client in clients:
 
647
        client.stop_hook = None
 
648
        client.stop()