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  • Committer: Teddy Hogeborn
  • Date: 2008-07-19 18:43:24 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080719184324-iwhoa5in75xa0u2u
* mandos-clients.conf ([foo]/dn, [foo]/password, [braxen_client]/dn,
                       [braxen_client]/password): Removed.
  ([foo]/fingerprint, [braxen_client]/fingerprint): New.
  ([foo]/checker): New.
  ([foo]/secfile): New.
  ([braxen_client]/secret): New.

* server.py: New "--debug" option to set debug flag.  Removed "cert",
             "key", "ca", "crl", and "cred" variables.  Added default
             value for "checker" config file setting.  Do not pass
             credentials to IPv6_TCPServer constructor.
  (debug): New global debug flag.  Used by most debugging output code.
  (Client.__init__): Keyword argument "dn" replaced by "fingerprint",
                     "password" renamed to "secret", and "passfile"
                     renamed to "secfile".  New keyword argument
                     "checker". All callers changed.
  (Client.dn): Removed.
  (Client.fingerprint): New.
  (Client.password): Renamed to "secret"; all users changed.
  (Client.passfile): Renamed to "secfile"; all users changed.
  (Client.timeout, Client.interval): Changed to be properties; now
                                     automatically updates the
                                     "_timeout_milliseconds" and
                                     "_interval_milliseconds" values.
  (Client.timeout_milliseconds): Renamed to "_timeout_milliseconds".
  (Client.interval_milliseconds): Renamed to "_interval_milliseconds".
  (Client.check_command): New.
  (Client.start_checker): Use the new "check_command" attribute.
  (peer_certificate, fingerprint): New functions.

  (tcp_handler.handle): Use ClientSession with empty credentials
                        object instead of ServerSession.  Set gnutls
                        priority string.  Do not verify peer.  Use
                        fingerprint instead of DN when searching for
                        clients.  Bug fix: Loop sending data so even large
                        secret data strings are sent.
  (IPv6_TCPServer.credentials): Removed.
  (if_nametoindex): Do not import ctypes since that is now imported
                    globally.

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server.py
1
1
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
# 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
# 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# 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
 
# 
32
2
 
33
3
from __future__ import division
34
4
 
51
21
import signal
52
22
from sets import Set
53
23
import subprocess
54
 
import atexit
55
 
import stat
56
 
import logging
57
 
import logging.handlers
58
 
import pwd
59
24
 
60
25
import dbus
61
26
import gobject
63
28
from dbus.mainloop.glib import DBusGMainLoop
64
29
import ctypes
65
30
 
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
 
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
169
45
# End of Avahi example code
170
46
 
171
47
 
176
52
    fingerprint: string (40 or 32 hexadecimal digits); used to
177
53
                 uniquely identify the client
178
54
    secret:    bytestring; sent verbatim (over TLS) to client
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
 
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
184
60
    interval:  datetime.timedelta(); How often to start a new checker
185
61
    stop_hook: If set, called by stop() as stop_hook(self)
186
62
    checker:   subprocess.Popen(); a running checker process used
187
63
                                   to see if the client lives.
188
 
                                   'None' if no process is running.
 
64
                                   Is None if no process is running.
189
65
    checker_initiator_tag: a gobject event source tag, or None
190
66
    stop_initiator_tag:    - '' -
191
67
    checker_callback_tag:  - '' -
192
68
    checker_command: string; External command which is run to check if
193
 
                     client lives.  %() expansions are done at
 
69
                     client lives.  %()s expansions are done at
194
70
                     runtime with vars(self) as dict, so that for
195
71
                     instance %(name)s can be used in the command.
196
72
    Private attibutes:
197
73
    _timeout: Real variable for 'timeout'
198
74
    _interval: Real variable for 'interval'
199
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
75
    _timeout_milliseconds: Used by gobject.timeout_add()
200
76
    _interval_milliseconds: - '' -
201
77
    """
202
78
    def _set_timeout(self, timeout):
222
98
    interval = property(lambda self: self._interval,
223
99
                        _set_interval)
224
100
    del _set_interval
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."""
 
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):
229
104
        self.name = name
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"])
 
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)
241
113
            self.secret = sf.read()
242
114
            sf.close()
243
115
        else:
244
 
            raise TypeError(u"No secret or secfile for client %s"
245
 
                            % self.name)
246
 
        self.host = config.get("host", "")
 
116
            raise RuntimeError(u"No secret or secfile for client %s"
 
117
                               % self.name)
 
118
        self.fqdn = fqdn                # string
247
119
        self.created = datetime.datetime.now()
248
 
        self.last_checked_ok = None
249
 
        self.timeout = string_to_delta(config["timeout"])
250
 
        self.interval = string_to_delta(config["interval"])
 
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
251
129
        self.stop_hook = stop_hook
252
130
        self.checker = None
253
131
        self.checker_initiator_tag = None
254
132
        self.stop_initiator_tag = None
255
133
        self.checker_callback_tag = None
256
 
        self.check_command = config["checker"]
 
134
        self.check_command = checker
257
135
    def start(self):
258
 
        """Start this client's checker and timeout hooks"""
 
136
        """Start this clients checker and timeout hooks"""
259
137
        # Schedule a new checker to be started an 'interval' from now,
260
138
        # and every interval from then on.
261
139
        self.checker_initiator_tag = gobject.timeout_add\
269
147
                                   self.stop)
270
148
    def stop(self):
271
149
        """Stop this client.
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):
 
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:
281
156
            gobject.source_remove(self.stop_initiator_tag)
282
157
            self.stop_initiator_tag = None
283
 
        if getattr(self, "checker_initiator_tag", False):
 
158
        if self.checker_initiator_tag:
284
159
            gobject.source_remove(self.checker_initiator_tag)
285
160
            self.checker_initiator_tag = None
286
161
        self.stop_checker()
289
164
        # Do not run this again if called by a gobject.timeout_add
290
165
        return False
291
166
    def __del__(self):
292
 
        self.stop_hook = None
293
 
        self.stop()
 
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()
294
177
    def checker_callback(self, pid, condition):
295
178
        """The checker has completed, so take appropriate actions."""
296
179
        now = datetime.datetime.now()
297
 
        self.checker_callback_tag = None
298
 
        self.checker = None
299
180
        if os.WIFEXITED(condition) \
300
181
               and (os.WEXITSTATUS(condition) == 0):
301
 
            logger.info(u"Checker for %(name)s succeeded",
302
 
                        vars(self))
303
 
            self.last_checked_ok = now
 
182
            if debug:
 
183
                sys.stderr.write(u"Checker for %(name)s succeeded\n"
 
184
                                 % vars(self))
 
185
            self.last_seen = now
304
186
            gobject.source_remove(self.stop_initiator_tag)
305
187
            self.stop_initiator_tag = gobject.timeout_add\
306
188
                                      (self._timeout_milliseconds,
307
189
                                       self.stop)
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))
 
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
314
199
    def start_checker(self):
315
200
        """Start a new checker subprocess if one is not running.
316
201
        If a checker already exists, leave it running and do
317
202
        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.
326
203
        if self.checker is None:
 
204
            if debug:
 
205
                sys.stderr.write(u"Starting checker for %s\n"
 
206
                                 % self.name)
327
207
            try:
328
 
                # In case check_command has exactly one % operator
329
 
                command = self.check_command % self.host
 
208
                command = self.check_command % self.fqdn
330
209
            except TypeError:
331
 
                # Escape attributes for the shell
332
210
                escaped_attrs = dict((key, re.escape(str(val)))
333
211
                                     for key, val in
334
212
                                     vars(self).iteritems())
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
 
213
                command = self.check_command % escaped_attrs
341
214
            try:
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)
 
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)
357
227
        # Re-run this periodically if run by gobject.timeout_add
358
228
        return True
359
229
    def stop_checker(self):
360
230
        """Force the checker process, if any, to stop."""
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:
 
231
        if not hasattr(self, "checker") or self.checker is None:
365
232
            return
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
 
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)
375
238
        self.checker = None
376
 
    def still_valid(self):
 
239
    def still_valid(self, now=None):
377
240
        """Has the timeout not yet passed for this client?"""
378
 
        now = datetime.datetime.now()
379
 
        if self.last_checked_ok is None:
 
241
        if now is None:
 
242
            now = datetime.datetime.now()
 
243
        if self.last_seen is None:
380
244
            return now < (self.created + self.timeout)
381
245
        else:
382
 
            return now < (self.last_checked_ok + self.timeout)
 
246
            return now < (self.last_seen + self.timeout)
383
247
 
384
248
 
385
249
def peer_certificate(session):
386
 
    "Return the peer's OpenPGP certificate as a bytestring"
387
250
    # If not an OpenPGP certificate...
388
251
    if gnutls.library.functions.gnutls_certificate_type_get\
389
252
            (session._c_object) \
400
263
 
401
264
 
402
265
def fingerprint(openpgp):
403
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
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))
404
270
    # New GnuTLS "datum" with the OpenPGP public key
405
271
    datum = gnutls.library.types.gnutls_datum_t\
406
272
        (ctypes.cast(ctypes.c_char_p(openpgp),
407
273
                     ctypes.POINTER(ctypes.c_ubyte)),
408
274
         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))
413
275
    # Import the OpenPGP public key into the certificate
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")
 
276
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
277
        (crt,
 
278
         ctypes.byref(datum),
 
279
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
424
280
    # New buffer for the fingerprint
425
281
    buffer = ctypes.create_string_buffer(20)
426
282
    buffer_length = ctypes.c_size_t()
442
298
    Note: This will run in its own forked process."""
443
299
    
444
300
    def handle(self):
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.
 
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())
463
310
        
464
311
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
312
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
313
        #                "+DHE-DSS"))
467
 
        priority = "NORMAL"             # Fallback default, since this
468
 
                                        # MUST be set.
469
 
        if self.server.settings["priority"]:
470
 
            priority = self.server.settings["priority"]
 
314
        priority = "SECURE256"
 
315
        
471
316
        gnutls.library.functions.gnutls_priority_set_direct\
472
317
            (session._c_object, priority, None);
473
318
        
474
319
        try:
475
320
            session.handshake()
476
321
        except gnutls.errors.GNUTLSError, error:
477
 
            logger.warning(u"Handshake failed: %s", error)
 
322
            if debug:
 
323
                sys.stderr.write(u"Handshake failed: %s\n" % error)
478
324
            # Do not run session.bye() here: the session is not
479
325
            # established.  Just abandon the request.
480
326
            return
481
327
        try:
482
328
            fpr = fingerprint(peer_certificate(session))
483
329
        except (TypeError, gnutls.errors.GNUTLSError), error:
484
 
            logger.warning(u"Bad certificate: %s", error)
 
330
            if debug:
 
331
                sys.stderr.write(u"Bad certificate: %s\n" % error)
485
332
            session.bye()
486
333
            return
487
 
        logger.debug(u"Fingerprint: %s", fpr)
 
334
        if debug:
 
335
            sys.stderr.write(u"Fingerprint: %s\n" % fpr)
488
336
        client = None
489
 
        for c in self.server.clients:
 
337
        for c in clients:
490
338
            if c.fingerprint == fpr:
491
339
                client = c
492
340
                break
493
 
        if not client:
494
 
            logger.warning(u"Client not found for fingerprint: %s",
495
 
                           fpr)
496
 
            session.bye()
497
 
            return
498
341
        # Have to check if client.still_valid(), since it is possible
499
342
        # that the client timed out while establishing the GnuTLS
500
343
        # session.
501
 
        if not client.still_valid():
502
 
            logger.warning(u"Client %(name)s is invalid",
503
 
                           vars(client))
 
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)
504
352
            session.bye()
505
353
            return
506
354
        sent_size = 0
507
355
        while sent_size < len(client.secret):
508
356
            sent = session.send(client.secret[sent_size:])
509
 
            logger.debug(u"Sent: %d, remaining: %d",
510
 
                         sent, len(client.secret)
511
 
                         - (sent_size + sent))
 
357
            if debug:
 
358
                sys.stderr.write(u"Sent: %d, remaining: %d\n"
 
359
                                 % (sent, len(client.secret)
 
360
                                    - (sent_size + sent)))
512
361
            sent_size += sent
513
362
        session.bye()
514
363
 
516
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
518
367
    Attributes:
519
 
        settings:       Server settings
 
368
        options:        Command line options
520
369
        clients:        Set() of Client objects
521
 
        enabled:        Boolean; whether this server is activated yet
522
370
    """
523
371
    address_family = socket.AF_INET6
524
372
    def __init__(self, *args, **kwargs):
525
 
        if "settings" in kwargs:
526
 
            self.settings = kwargs["settings"]
527
 
            del kwargs["settings"]
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
528
376
        if "clients" in kwargs:
529
377
            self.clients = kwargs["clients"]
530
378
            del kwargs["clients"]
531
 
        self.enabled = False
532
379
        return super(type(self), self).__init__(*args, **kwargs)
533
380
    def server_bind(self):
534
381
        """This overrides the normal server_bind() function
535
382
        to bind to an interface if one was specified, and also NOT to
536
383
        bind to an address or port if they were not specified."""
537
 
        if self.settings["interface"]:
538
 
            # 25 is from /usr/include/asm-i486/socket.h
539
 
            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
540
388
            try:
541
389
                self.socket.setsockopt(socket.SOL_SOCKET,
542
 
                                       SO_BINDTODEVICE,
543
 
                                       self.settings["interface"])
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
544
392
            except socket.error, error:
545
393
                if error[0] == errno.EPERM:
546
 
                    logger.error(u"No permission to"
547
 
                                 u" bind to interface %s",
548
 
                                 self.settings["interface"])
 
394
                    sys.stderr.write(u"Warning: No permission to" \
 
395
                                     u" bind to interface %s\n"
 
396
                                     % self.options.interface)
549
397
                else:
550
398
                    raise error
551
399
        # Only bind(2) the socket if we really need to.
554
402
                in6addr_any = "::"
555
403
                self.server_address = (in6addr_any,
556
404
                                       self.server_address[1])
557
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
558
406
                self.server_address = (self.server_address[0],
559
407
                                       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"]))
567
408
            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
573
409
 
574
410
 
575
411
def string_to_delta(interval):
585
421
    datetime.timedelta(1)
586
422
    >>> string_to_delta(u'1w')
587
423
    datetime.timedelta(7)
588
 
    >>> string_to_delta('5m 30s')
589
 
    datetime.timedelta(0, 330)
590
424
    """
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):
 
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:
609
439
            raise ValueError
610
 
        timevalue += delta
611
 
    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
    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()
612
477
 
613
478
 
614
479
def server_state_changed(state):
615
 
    """Derived from the Avahi example code"""
 
480
    """From the Avahi server example code"""
616
481
    if state == avahi.SERVER_COLLISION:
617
 
        logger.error(u"Zeroconf server name collision")
618
 
        service.remove()
 
482
        sys.stderr.write(u"WARNING: Server name collision\n")
 
483
        remove_service()
619
484
    elif state == avahi.SERVER_RUNNING:
620
 
        service.add()
 
485
        add_service()
621
486
 
622
487
 
623
488
def entry_group_state_changed(state, error):
624
 
    """Derived from the Avahi example code"""
625
 
    logger.debug(u"Avahi state change: %i", state)
 
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)
626
494
    
627
495
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
 
        logger.debug(u"Zeroconf service established.")
 
496
        if debug:
 
497
            sys.stderr.write(u"Service established.\n")
629
498
    elif state == avahi.ENTRY_GROUP_COLLISION:
630
 
        logger.warning(u"Zeroconf service name collision.")
631
 
        service.rename()
 
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()
632
513
    elif state == avahi.ENTRY_GROUP_FAILURE:
633
 
        logger.critical(u"Avahi: Error in group state changed %s",
634
 
                        unicode(error))
635
 
        raise AvahiGroupError("State changed: %s", str(error))
 
514
        sys.stderr.write(u"Error in group state changed %s\n"
 
515
                         % unicode(error))
 
516
        main_loop.quit()
 
517
        return
 
518
 
636
519
 
637
520
def if_nametoindex(interface):
638
 
    """Call the C function if_nametoindex(), or equivalent"""
639
 
    global if_nametoindex
 
521
    """Call the C function if_nametoindex()"""
640
522
    try:
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
 
523
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
524
        return libc.if_nametoindex(interface)
645
525
    except (OSError, AttributeError):
646
526
        if "struct" not in sys.modules:
647
527
            import struct
648
528
        if "fcntl" not in sys.modules:
649
529
            import fcntl
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)
 
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()
690
541
    parser.add_option("-i", "--interface", type="string",
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",
 
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,
695
557
                      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")
696
564
    parser.add_option("--check", action="store_true", default=False,
697
565
                      help="Run self-test")
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")
 
566
    parser.add_option("--debug", action="store_true", default=False,
 
567
                      help="Debug mode")
709
568
    (options, args) = parser.parse_args()
710
569
    
711
570
    if options.check:
713
572
        doctest.testmod()
714
573
        sys.exit()
715
574
    
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
 
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
815
592
    DBusGMainLoop(set_as_default=True )
816
593
    main_loop = gobject.MainLoop()
817
594
    bus = dbus.SystemBus()
818
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
 
                                           avahi.DBUS_PATH_SERVER),
820
 
                            avahi.DBUS_INTERFACE_SERVER)
 
595
    server = dbus.Interface(
 
596
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
597
            avahi.DBUS_INTERFACE_SERVER )
821
598
    # End of Avahi example code
822
599
    
 
600
    debug = options.debug
 
601
    
 
602
    clients = Set()
823
603
    def remove_from_clients(client):
824
604
        clients.remove(client)
825
605
        if not clients:
826
 
            logger.critical(u"No clients left, exiting")
827
 
            sys.exit()
 
606
            if debug:
 
607
                sys.stderr.write(u"No clients left, exiting\n")
 
608
            main_loop.quit()
828
609
    
829
 
    clients.update(Set(Client(name = section,
 
610
    clients.update(Set(Client(name=section, options=options,
830
611
                              stop_hook = remove_from_clients,
831
 
                              config
832
 
                              = dict(client_config.items(section)))
 
612
                              **(dict(client_config\
 
613
                                      .items(section))))
833
614
                       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
 
    
884
615
    for client in clients:
885
616
        client.start()
886
617
    
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
 
    
 
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)
897
639
    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
914
640
        main_loop.run()
915
 
    except AvahiError, error:
916
 
        logger.critical(u"AvahiError: %s" + unicode(error))
917
 
        sys.exit(1)
918
641
    except KeyboardInterrupt:
919
 
        if debug:
920
 
            print
 
642
        print
 
643
    
 
644
    # Cleanup here
921
645
 
922
 
if __name__ == '__main__':
923
 
    main()
 
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()