/mandos/release

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

« back to all changes in this revision

Viewing changes to server.py

  • 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.

Show diffs side-by-side

added added

removed removed

Lines of Context:
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", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
12
 
# 
13
 
# Everything else is
14
 
# Copyright © 2008,2009 Teddy Hogeborn
15
 
# Copyright © 2008,2009 Björn Påhlsson
16
 
# 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
# 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
# 
31
 
# Contact the authors at <mandos@fukt.bsnet.se>.
32
 
# 
33
 
 
34
 
from __future__ import division, with_statement, absolute_import
35
 
 
36
 
import SocketServer as socketserver
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
37
6
import socket
38
 
import optparse
 
7
import select
 
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
44
14
import gnutls.library.functions
45
15
import gnutls.library.constants
46
16
import gnutls.library.types
47
 
import ConfigParser as configparser
 
17
import ConfigParser
48
18
import sys
49
19
import re
50
20
import os
51
21
import signal
 
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
 
from contextlib import closing
59
 
import struct
60
 
import fcntl
61
 
import functools
62
24
 
63
25
import dbus
64
 
import dbus.service
65
26
import gobject
66
27
import avahi
67
28
from dbus.mainloop.glib import DBusGMainLoop
68
29
import ctypes
69
 
import ctypes.util
70
 
import xml.dom.minidom
71
 
import inspect
72
 
 
73
 
try:
74
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
 
except AttributeError:
76
 
    try:
77
 
        from IN import SO_BINDTODEVICE
78
 
    except ImportError:
79
 
        SO_BINDTODEVICE = None
80
 
 
81
 
 
82
 
version = "1.0.12"
83
 
 
84
 
logger = logging.Logger(u'mandos')
85
 
syslogger = (logging.handlers.SysLogHandler
86
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
 
              address = "/dev/log"))
88
 
syslogger.setFormatter(logging.Formatter
89
 
                       (u'Mandos [%(process)d]: %(levelname)s:'
90
 
                        u' %(message)s'))
91
 
logger.addHandler(syslogger)
92
 
 
93
 
console = logging.StreamHandler()
94
 
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
 
                                       u' %(levelname)s:'
96
 
                                       u' %(message)s'))
97
 
logger.addHandler(console)
98
 
 
99
 
class AvahiError(Exception):
100
 
    def __init__(self, value, *args, **kwargs):
101
 
        self.value = value
102
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
103
 
    def __unicode__(self):
104
 
        return unicode(repr(self.value))
105
 
 
106
 
class AvahiServiceError(AvahiError):
107
 
    pass
108
 
 
109
 
class AvahiGroupError(AvahiError):
110
 
    pass
111
 
 
112
 
 
113
 
class AvahiService(object):
114
 
    """An Avahi (Zeroconf) service.
115
 
    
116
 
    Attributes:
117
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
118
 
               Used to optionally bind to the specified interface.
119
 
    name: string; Example: u'Mandos'
120
 
    type: string; Example: u'_mandos._tcp'.
121
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
122
 
    port: integer; what port to announce
123
 
    TXT: list of strings; TXT record for the service
124
 
    domain: string; Domain to publish on, default to .local if empty.
125
 
    host: string; Host to publish records for, default is localhost
126
 
    max_renames: integer; maximum number of renames
127
 
    rename_count: integer; counter so we only rename after collisions
128
 
                  a sensible number of times
129
 
    group: D-Bus Entry Group
130
 
    server: D-Bus Server
131
 
    bus: dbus.SystemBus()
132
 
    """
133
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
 
                 servicetype = None, port = None, TXT = None,
135
 
                 domain = u"", host = u"", max_renames = 32768,
136
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
137
 
        self.interface = interface
138
 
        self.name = name
139
 
        self.type = servicetype
140
 
        self.port = port
141
 
        self.TXT = TXT if TXT is not None else []
142
 
        self.domain = domain
143
 
        self.host = host
144
 
        self.rename_count = 0
145
 
        self.max_renames = max_renames
146
 
        self.protocol = protocol
147
 
        self.group = None       # our entry group
148
 
        self.server = None
149
 
        self.bus = bus
150
 
    def rename(self):
151
 
        """Derived from the Avahi example code"""
152
 
        if self.rename_count >= self.max_renames:
153
 
            logger.critical(u"No suitable Zeroconf service name found"
154
 
                            u" after %i retries, exiting.",
155
 
                            self.rename_count)
156
 
            raise AvahiServiceError(u"Too many renames")
157
 
        self.name = self.server.GetAlternativeServiceName(self.name)
158
 
        logger.info(u"Changing Zeroconf service name to %r ...",
159
 
                    unicode(self.name))
160
 
        syslogger.setFormatter(logging.Formatter
161
 
                               (u'Mandos (%s) [%%(process)d]:'
162
 
                                u' %%(levelname)s: %%(message)s'
163
 
                                % self.name))
164
 
        self.remove()
165
 
        self.add()
166
 
        self.rename_count += 1
167
 
    def remove(self):
168
 
        """Derived from the Avahi example code"""
169
 
        if self.group is not None:
170
 
            self.group.Reset()
171
 
    def add(self):
172
 
        """Derived from the Avahi example code"""
173
 
        if self.group is None:
174
 
            self.group = dbus.Interface(
175
 
                self.bus.get_object(avahi.DBUS_NAME,
176
 
                                    self.server.EntryGroupNew()),
177
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
 
            self.group.connect_to_signal('StateChanged',
179
 
                                         self
180
 
                                         .entry_group_state_changed)
181
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
 
                     self.name, self.type)
183
 
        self.group.AddService(
184
 
            self.interface,
185
 
            self.protocol,
186
 
            dbus.UInt32(0),     # flags
187
 
            self.name, self.type,
188
 
            self.domain, self.host,
189
 
            dbus.UInt16(self.port),
190
 
            avahi.string_array_to_txt_array(self.TXT))
191
 
        self.group.Commit()
192
 
    def entry_group_state_changed(self, state, error):
193
 
        """Derived from the Avahi example code"""
194
 
        logger.debug(u"Avahi state change: %i", state)
195
 
        
196
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
 
            logger.debug(u"Zeroconf service established.")
198
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
199
 
            logger.warning(u"Zeroconf service name collision.")
200
 
            self.rename()
201
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
202
 
            logger.critical(u"Avahi: Error in group state changed %s",
203
 
                            unicode(error))
204
 
            raise AvahiGroupError(u"State changed: %s"
205
 
                                  % unicode(error))
206
 
    def cleanup(self):
207
 
        """Derived from the Avahi example code"""
208
 
        if self.group is not None:
209
 
            self.group.Free()
210
 
            self.group = None
211
 
    def server_state_changed(self, state):
212
 
        """Derived from the Avahi example code"""
213
 
        if state == avahi.SERVER_COLLISION:
214
 
            logger.error(u"Zeroconf server name collision")
215
 
            self.remove()
216
 
        elif state == avahi.SERVER_RUNNING:
217
 
            self.add()
218
 
    def activate(self):
219
 
        """Derived from the Avahi example code"""
220
 
        if self.server is None:
221
 
            self.server = dbus.Interface(
222
 
                self.bus.get_object(avahi.DBUS_NAME,
223
 
                                    avahi.DBUS_PATH_SERVER),
224
 
                avahi.DBUS_INTERFACE_SERVER)
225
 
        self.server.connect_to_signal(u"StateChanged",
226
 
                                 self.server_state_changed)
227
 
        self.server_state_changed(self.server.GetState())
 
30
 
 
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
 
45
# End of Avahi example code
228
46
 
229
47
 
230
48
class Client(object):
231
49
    """A representation of a client host served by this server.
232
 
    
233
50
    Attributes:
234
 
    name:       string; from the config file, used in log messages and
235
 
                        D-Bus identifiers
 
51
    name:      string; from the config file, used in log messages
236
52
    fingerprint: string (40 or 32 hexadecimal digits); used to
237
53
                 uniquely identify the client
238
 
    secret:     bytestring; sent verbatim (over TLS) to client
239
 
    host:       string; available for use by the checker command
240
 
    created:    datetime.datetime(); (UTC) object creation
241
 
    last_enabled: datetime.datetime(); (UTC)
242
 
    enabled:    bool()
243
 
    last_checked_ok: datetime.datetime(); (UTC) or None
244
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
245
 
                                      until this client is invalid
246
 
    interval:   datetime.timedelta(); How often to start a new checker
247
 
    disable_hook:  If set, called by disable() as disable_hook(self)
248
 
    checker:    subprocess.Popen(); a running checker process used
249
 
                                    to see if the client lives.
250
 
                                    'None' if no process is running.
 
54
    secret:    bytestring; sent verbatim (over TLS) to client
 
55
    fqdn:      string (FQDN); available for use by the checker command
 
56
    created:   datetime.datetime()
 
57
    last_seen: datetime.datetime() or None if not yet seen
 
58
    timeout:   datetime.timedelta(); How long from last_seen until
 
59
                                     this client is invalid
 
60
    interval:  datetime.timedelta(); How often to start a new checker
 
61
    stop_hook: If set, called by stop() as stop_hook(self)
 
62
    checker:   subprocess.Popen(); a running checker process used
 
63
                                   to see if the client lives.
 
64
                                   Is None if no process is running.
251
65
    checker_initiator_tag: a gobject event source tag, or None
252
 
    disable_initiator_tag: - '' -
 
66
    stop_initiator_tag:    - '' -
253
67
    checker_callback_tag:  - '' -
254
68
    checker_command: string; External command which is run to check if
255
 
                     client lives.  %() expansions are done at
 
69
                     client lives.  %()s expansions are done at
256
70
                     runtime with vars(self) as dict, so that for
257
71
                     instance %(name)s can be used in the command.
258
 
    current_checker_command: string; current running checker_command
 
72
    Private attibutes:
 
73
    _timeout: Real variable for 'timeout'
 
74
    _interval: Real variable for 'interval'
 
75
    _timeout_milliseconds: Used by gobject.timeout_add()
 
76
    _interval_milliseconds: - '' -
259
77
    """
260
 
    
261
 
    @staticmethod
262
 
    def _timedelta_to_milliseconds(td):
263
 
        "Convert a datetime.timedelta() to milliseconds"
264
 
        return ((td.days * 24 * 60 * 60 * 1000)
265
 
                + (td.seconds * 1000)
266
 
                + (td.microseconds // 1000))
267
 
    
268
 
    def timeout_milliseconds(self):
269
 
        "Return the 'timeout' attribute in milliseconds"
270
 
        return self._timedelta_to_milliseconds(self.timeout)
271
 
    
272
 
    def interval_milliseconds(self):
273
 
        "Return the 'interval' attribute in milliseconds"
274
 
        return self._timedelta_to_milliseconds(self.interval)
275
 
    
276
 
    def __init__(self, name = None, disable_hook=None, config=None):
277
 
        """Note: the 'checker' key in 'config' sets the
278
 
        'checker_command' attribute and *not* the 'checker'
279
 
        attribute."""
 
78
    def _set_timeout(self, timeout):
 
79
        "Setter function for 'timeout' attribute"
 
80
        self._timeout = timeout
 
81
        self._timeout_milliseconds = ((self.timeout.days
 
82
                                       * 24 * 60 * 60 * 1000)
 
83
                                      + (self.timeout.seconds * 1000)
 
84
                                      + (self.timeout.microseconds
 
85
                                         // 1000))
 
86
    timeout = property(lambda self: self._timeout,
 
87
                       _set_timeout)
 
88
    del _set_timeout
 
89
    def _set_interval(self, interval):
 
90
        "Setter function for 'interval' attribute"
 
91
        self._interval = interval
 
92
        self._interval_milliseconds = ((self.interval.days
 
93
                                        * 24 * 60 * 60 * 1000)
 
94
                                       + (self.interval.seconds
 
95
                                          * 1000)
 
96
                                       + (self.interval.microseconds
 
97
                                          // 1000))
 
98
    interval = property(lambda self: self._interval,
 
99
                        _set_interval)
 
100
    del _set_interval
 
101
    def __init__(self, name=None, options=None, stop_hook=None,
 
102
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
103
                 timeout=None, interval=-1, checker=None):
280
104
        self.name = name
281
 
        if config is None:
282
 
            config = {}
283
 
        logger.debug(u"Creating client %r", self.name)
284
 
        # Uppercase and remove spaces from fingerprint for later
285
 
        # comparison purposes with return value from the fingerprint()
286
 
        # function
287
 
        self.fingerprint = (config[u"fingerprint"].upper()
288
 
                            .replace(u" ", u""))
289
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
290
 
        if u"secret" in config:
291
 
            self.secret = config[u"secret"].decode(u"base64")
292
 
        elif u"secfile" in config:
293
 
            with closing(open(os.path.expanduser
294
 
                              (os.path.expandvars
295
 
                               (config[u"secfile"])))) as secfile:
296
 
                self.secret = secfile.read()
297
 
        else:
298
 
            raise TypeError(u"No secret or secfile for client %s"
299
 
                            % self.name)
300
 
        self.host = config.get(u"host", u"")
301
 
        self.created = datetime.datetime.utcnow()
302
 
        self.enabled = False
303
 
        self.last_enabled = None
304
 
        self.last_checked_ok = None
305
 
        self.timeout = string_to_delta(config[u"timeout"])
306
 
        self.interval = string_to_delta(config[u"interval"])
307
 
        self.disable_hook = disable_hook
 
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)
 
113
            self.secret = sf.read()
 
114
            sf.close()
 
115
        else:
 
116
            raise RuntimeError(u"No secret or secfile for client %s"
 
117
                               % self.name)
 
118
        self.fqdn = fqdn                # string
 
119
        self.created = datetime.datetime.now()
 
120
        self.last_seen = None
 
121
        if timeout is None:
 
122
            timeout = options.timeout
 
123
        self.timeout = timeout
 
124
        if interval == -1:
 
125
            interval = options.interval
 
126
        else:
 
127
            interval = string_to_delta(interval)
 
128
        self.interval = interval
 
129
        self.stop_hook = stop_hook
308
130
        self.checker = None
309
131
        self.checker_initiator_tag = None
310
 
        self.disable_initiator_tag = None
 
132
        self.stop_initiator_tag = None
311
133
        self.checker_callback_tag = None
312
 
        self.checker_command = config[u"checker"]
313
 
        self.current_checker_command = None
314
 
        self.last_connect = None
315
 
    
316
 
    def enable(self):
317
 
        """Start this client's checker and timeout hooks"""
318
 
        if getattr(self, u"enabled", False):
319
 
            # Already enabled
320
 
            return
321
 
        self.last_enabled = datetime.datetime.utcnow()
 
134
        self.check_command = checker
 
135
    def start(self):
 
136
        """Start this clients checker and timeout hooks"""
322
137
        # Schedule a new checker to be started an 'interval' from now,
323
138
        # and every interval from then on.
324
 
        self.checker_initiator_tag = (gobject.timeout_add
325
 
                                      (self.interval_milliseconds(),
326
 
                                       self.start_checker))
 
139
        self.checker_initiator_tag = gobject.timeout_add\
 
140
                                     (self._interval_milliseconds,
 
141
                                      self.start_checker)
327
142
        # Also start a new checker *right now*.
328
143
        self.start_checker()
329
 
        # Schedule a disable() when 'timeout' has passed
330
 
        self.disable_initiator_tag = (gobject.timeout_add
331
 
                                   (self.timeout_milliseconds(),
332
 
                                    self.disable))
333
 
        self.enabled = True
334
 
    
335
 
    def disable(self):
336
 
        """Disable this client."""
337
 
        if not getattr(self, "enabled", False):
338
 
            return False
339
 
        logger.info(u"Disabling client %s", self.name)
340
 
        if getattr(self, u"disable_initiator_tag", False):
341
 
            gobject.source_remove(self.disable_initiator_tag)
342
 
            self.disable_initiator_tag = None
343
 
        if getattr(self, u"checker_initiator_tag", False):
 
144
        # Schedule a stop() when 'timeout' has passed
 
145
        self.stop_initiator_tag = gobject.timeout_add\
 
146
                                  (self._timeout_milliseconds,
 
147
                                   self.stop)
 
148
    def stop(self):
 
149
        """Stop this client.
 
150
        The possibility that this client might be restarted is left
 
151
        open, but not currently used."""
 
152
        if debug:
 
153
            sys.stderr.write(u"Stopping client %s\n" % self.name)
 
154
        self.secret = None
 
155
        if self.stop_initiator_tag:
 
156
            gobject.source_remove(self.stop_initiator_tag)
 
157
            self.stop_initiator_tag = None
 
158
        if self.checker_initiator_tag:
344
159
            gobject.source_remove(self.checker_initiator_tag)
345
160
            self.checker_initiator_tag = None
346
161
        self.stop_checker()
347
 
        if self.disable_hook:
348
 
            self.disable_hook(self)
349
 
        self.enabled = False
 
162
        if self.stop_hook:
 
163
            self.stop_hook(self)
350
164
        # Do not run this again if called by a gobject.timeout_add
351
165
        return False
352
 
    
353
166
    def __del__(self):
354
 
        self.disable_hook = None
355
 
        self.disable()
356
 
    
357
 
    def checker_callback(self, pid, condition, command):
 
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()
 
177
    def checker_callback(self, pid, condition):
358
178
        """The checker has completed, so take appropriate actions."""
 
179
        now = datetime.datetime.now()
 
180
        if os.WIFEXITED(condition) \
 
181
               and (os.WEXITSTATUS(condition) == 0):
 
182
            if debug:
 
183
                sys.stderr.write(u"Checker for %(name)s succeeded\n"
 
184
                                 % vars(self))
 
185
            self.last_seen = now
 
186
            gobject.source_remove(self.stop_initiator_tag)
 
187
            self.stop_initiator_tag = gobject.timeout_add\
 
188
                                      (self._timeout_milliseconds,
 
189
                                       self.stop)
 
190
        elif debug:
 
191
            if not os.WIFEXITED(condition):
 
192
                sys.stderr.write(u"Checker for %(name)s crashed?\n"
 
193
                                 % vars(self))
 
194
            else:
 
195
                sys.stderr.write(u"Checker for %(name)s failed\n"
 
196
                                 % vars(self))
 
197
        self.checker = None
359
198
        self.checker_callback_tag = None
360
 
        self.checker = None
361
 
        if os.WIFEXITED(condition):
362
 
            exitstatus = os.WEXITSTATUS(condition)
363
 
            if exitstatus == 0:
364
 
                logger.info(u"Checker for %(name)s succeeded",
365
 
                            vars(self))
366
 
                self.checked_ok()
367
 
            else:
368
 
                logger.info(u"Checker for %(name)s failed",
369
 
                            vars(self))
370
 
        else:
371
 
            logger.warning(u"Checker for %(name)s crashed?",
372
 
                           vars(self))
373
 
    
374
 
    def checked_ok(self):
375
 
        """Bump up the timeout for this client.
376
 
        
377
 
        This should only be called when the client has been seen,
378
 
        alive and well.
379
 
        """
380
 
        self.last_checked_ok = datetime.datetime.utcnow()
381
 
        gobject.source_remove(self.disable_initiator_tag)
382
 
        self.disable_initiator_tag = (gobject.timeout_add
383
 
                                      (self.timeout_milliseconds(),
384
 
                                       self.disable))
385
 
    
386
199
    def start_checker(self):
387
200
        """Start a new checker subprocess if one is not running.
388
 
        
389
201
        If a checker already exists, leave it running and do
390
202
        nothing."""
391
 
        # The reason for not killing a running checker is that if we
392
 
        # did that, then if a checker (for some reason) started
393
 
        # running slowly and taking more than 'interval' time, the
394
 
        # client would inevitably timeout, since no checker would get
395
 
        # a chance to run to completion.  If we instead leave running
396
 
        # checkers alone, the checker would have to take more time
397
 
        # than 'timeout' for the client to be declared invalid, which
398
 
        # is as it should be.
399
 
        
400
 
        # If a checker exists, make sure it is not a zombie
401
 
        if self.checker is not None:
402
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
 
            if pid:
404
 
                logger.warning(u"Checker was a zombie")
405
 
                gobject.source_remove(self.checker_callback_tag)
406
 
                self.checker_callback(pid, status,
407
 
                                      self.current_checker_command)
408
 
        # Start a new checker if needed
409
203
        if self.checker is None:
 
204
            if debug:
 
205
                sys.stderr.write(u"Starting checker for %s\n"
 
206
                                 % self.name)
410
207
            try:
411
 
                # In case checker_command has exactly one % operator
412
 
                command = self.checker_command % self.host
 
208
                command = self.check_command % self.fqdn
413
209
            except TypeError:
414
 
                # Escape attributes for the shell
415
 
                escaped_attrs = dict((key,
416
 
                                      re.escape(unicode(str(val),
417
 
                                                        errors=
418
 
                                                        u'replace')))
 
210
                escaped_attrs = dict((key, re.escape(str(val)))
419
211
                                     for key, val in
420
212
                                     vars(self).iteritems())
421
 
                try:
422
 
                    command = self.checker_command % escaped_attrs
423
 
                except TypeError, error:
424
 
                    logger.error(u'Could not format string "%s":'
425
 
                                 u' %s', self.checker_command, error)
426
 
                    return True # Try again later
427
 
            self.current_checker_command = command
 
213
                command = self.check_command % escaped_attrs
428
214
            try:
429
 
                logger.info(u"Starting checker %r for %s",
430
 
                            command, self.name)
431
 
                # We don't need to redirect stdout and stderr, since
432
 
                # in normal mode, that is already done by daemon(),
433
 
                # and in debug mode we don't want to.  (Stdin is
434
 
                # always replaced by /dev/null.)
435
 
                self.checker = subprocess.Popen(command,
436
 
                                                close_fds=True,
437
 
                                                shell=True, cwd=u"/")
438
 
                self.checker_callback_tag = (gobject.child_watch_add
439
 
                                             (self.checker.pid,
440
 
                                              self.checker_callback,
441
 
                                              data=command))
442
 
                # The checker may have completed before the gobject
443
 
                # watch was added.  Check for this.
444
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
 
                if pid:
446
 
                    gobject.source_remove(self.checker_callback_tag)
447
 
                    self.checker_callback(pid, status, command)
448
 
            except OSError, error:
449
 
                logger.error(u"Failed to start subprocess: %s",
450
 
                             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)
451
227
        # Re-run this periodically if run by gobject.timeout_add
452
228
        return True
453
 
    
454
229
    def stop_checker(self):
455
230
        """Force the checker process, if any, to stop."""
456
 
        if self.checker_callback_tag:
457
 
            gobject.source_remove(self.checker_callback_tag)
458
 
            self.checker_callback_tag = None
459
 
        if getattr(self, u"checker", None) is None:
 
231
        if not hasattr(self, "checker") or self.checker is None:
460
232
            return
461
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
462
 
        try:
463
 
            os.kill(self.checker.pid, signal.SIGTERM)
464
 
            #os.sleep(0.5)
465
 
            #if self.checker.poll() is None:
466
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
467
 
        except OSError, error:
468
 
            if error.errno != errno.ESRCH: # No such process
469
 
                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)
470
238
        self.checker = None
471
 
    
472
 
    def still_valid(self):
 
239
    def still_valid(self, now=None):
473
240
        """Has the timeout not yet passed for this client?"""
474
 
        if not getattr(self, u"enabled", False):
475
 
            return False
476
 
        now = datetime.datetime.utcnow()
477
 
        if self.last_checked_ok is None:
 
241
        if now is None:
 
242
            now = datetime.datetime.now()
 
243
        if self.last_seen is None:
478
244
            return now < (self.created + self.timeout)
479
245
        else:
480
 
            return now < (self.last_checked_ok + self.timeout)
481
 
 
482
 
 
483
 
def dbus_service_property(dbus_interface, signature=u"v",
484
 
                          access=u"readwrite", byte_arrays=False):
485
 
    """Decorators for marking methods of a DBusObjectWithProperties to
486
 
    become properties on the D-Bus.
487
 
    
488
 
    The decorated method will be called with no arguments by "Get"
489
 
    and with one argument by "Set".
490
 
    
491
 
    The parameters, where they are supported, are the same as
492
 
    dbus.service.method, except there is only "signature", since the
493
 
    type from Get() and the type sent to Set() is the same.
494
 
    """
495
 
    def decorator(func):
496
 
        func._dbus_is_property = True
497
 
        func._dbus_interface = dbus_interface
498
 
        func._dbus_signature = signature
499
 
        func._dbus_access = access
500
 
        func._dbus_name = func.__name__
501
 
        if func._dbus_name.endswith(u"_dbus_property"):
502
 
            func._dbus_name = func._dbus_name[:-14]
503
 
        func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
 
        return func
505
 
    return decorator
506
 
 
507
 
 
508
 
class DBusPropertyException(dbus.exceptions.DBusException):
509
 
    """A base class for D-Bus property-related exceptions
510
 
    """
511
 
    def __unicode__(self):
512
 
        return unicode(str(self))
513
 
 
514
 
 
515
 
class DBusPropertyAccessException(DBusPropertyException):
516
 
    """A property's access permissions disallows an operation.
517
 
    """
518
 
    pass
519
 
 
520
 
 
521
 
class DBusPropertyNotFound(DBusPropertyException):
522
 
    """An attempt was made to access a non-existing property.
523
 
    """
524
 
    pass
525
 
 
526
 
 
527
 
class DBusObjectWithProperties(dbus.service.Object):
528
 
    """A D-Bus object with properties.
529
 
 
530
 
    Classes inheriting from this can use the dbus_service_property
531
 
    decorator to expose methods as D-Bus properties.  It exposes the
532
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
533
 
    """
534
 
    
535
 
    @staticmethod
536
 
    def _is_dbus_property(obj):
537
 
        return getattr(obj, u"_dbus_is_property", False)
538
 
    
539
 
    def _get_all_dbus_properties(self):
540
 
        """Returns a generator of (name, attribute) pairs
541
 
        """
542
 
        return ((prop._dbus_name, prop)
543
 
                for name, prop in
544
 
                inspect.getmembers(self, self._is_dbus_property))
545
 
    
546
 
    def _get_dbus_property(self, interface_name, property_name):
547
 
        """Returns a bound method if one exists which is a D-Bus
548
 
        property with the specified name and interface.
549
 
        """
550
 
        for name in (property_name,
551
 
                     property_name + u"_dbus_property"):
552
 
            prop = getattr(self, name, None)
553
 
            if (prop is None
554
 
                or not self._is_dbus_property(prop)
555
 
                or prop._dbus_name != property_name
556
 
                or (interface_name and prop._dbus_interface
557
 
                    and interface_name != prop._dbus_interface)):
558
 
                continue
559
 
            return prop
560
 
        # No such property
561
 
        raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
 
                                   + interface_name + u"."
563
 
                                   + property_name)
564
 
    
565
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
 
                         out_signature=u"v")
567
 
    def Get(self, interface_name, property_name):
568
 
        """Standard D-Bus property Get() method, see D-Bus standard.
569
 
        """
570
 
        prop = self._get_dbus_property(interface_name, property_name)
571
 
        if prop._dbus_access == u"write":
572
 
            raise DBusPropertyAccessException(property_name)
573
 
        value = prop()
574
 
        if not hasattr(value, u"variant_level"):
575
 
            return value
576
 
        return type(value)(value, variant_level=value.variant_level+1)
577
 
    
578
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
 
    def Set(self, interface_name, property_name, value):
580
 
        """Standard D-Bus property Set() method, see D-Bus standard.
581
 
        """
582
 
        prop = self._get_dbus_property(interface_name, property_name)
583
 
        if prop._dbus_access == u"read":
584
 
            raise DBusPropertyAccessException(property_name)
585
 
        if prop._dbus_get_args_options[u"byte_arrays"]:
586
 
            value = dbus.ByteArray(''.join(unichr(byte)
587
 
                                           for byte in value))
588
 
        prop(value)
589
 
    
590
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
 
                         out_signature=u"a{sv}")
592
 
    def GetAll(self, interface_name):
593
 
        """Standard D-Bus property GetAll() method, see D-Bus
594
 
        standard.
595
 
 
596
 
        Note: Will not include properties with access="write".
597
 
        """
598
 
        all = {}
599
 
        for name, prop in self._get_all_dbus_properties():
600
 
            if (interface_name
601
 
                and interface_name != prop._dbus_interface):
602
 
                # Interface non-empty but did not match
603
 
                continue
604
 
            # Ignore write-only properties
605
 
            if prop._dbus_access == u"write":
606
 
                continue
607
 
            value = prop()
608
 
            if not hasattr(value, u"variant_level"):
609
 
                all[name] = value
610
 
                continue
611
 
            all[name] = type(value)(value, variant_level=
612
 
                                    value.variant_level+1)
613
 
        return dbus.Dictionary(all, signature=u"sv")
614
 
    
615
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
 
                         out_signature=u"s",
617
 
                         path_keyword='object_path',
618
 
                         connection_keyword='connection')
619
 
    def Introspect(self, object_path, connection):
620
 
        """Standard D-Bus method, overloaded to insert property tags.
621
 
        """
622
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
623
 
                                           connection)
624
 
        document = xml.dom.minidom.parseString(xmlstring)
625
 
        del xmlstring
626
 
        def make_tag(document, name, prop):
627
 
            e = document.createElement(u"property")
628
 
            e.setAttribute(u"name", name)
629
 
            e.setAttribute(u"type", prop._dbus_signature)
630
 
            e.setAttribute(u"access", prop._dbus_access)
631
 
            return e
632
 
        for if_tag in document.getElementsByTagName(u"interface"):
633
 
            for tag in (make_tag(document, name, prop)
634
 
                        for name, prop
635
 
                        in self._get_all_dbus_properties()
636
 
                        if prop._dbus_interface
637
 
                        == if_tag.getAttribute(u"name")):
638
 
                if_tag.appendChild(tag)
639
 
        xmlstring = document.toxml(u"utf-8")
640
 
        document.unlink()
641
 
        return xmlstring
642
 
 
643
 
 
644
 
class ClientDBus(Client, DBusObjectWithProperties):
645
 
    """A Client class using D-Bus
646
 
    
647
 
    Attributes:
648
 
    dbus_object_path: dbus.ObjectPath
649
 
    bus: dbus.SystemBus()
650
 
    """
651
 
    # dbus.service.Object doesn't use super(), so we can't either.
652
 
    
653
 
    def __init__(self, bus = None, *args, **kwargs):
654
 
        self.bus = bus
655
 
        Client.__init__(self, *args, **kwargs)
656
 
        # Only now, when this client is initialized, can it show up on
657
 
        # the D-Bus
658
 
        self.dbus_object_path = (dbus.ObjectPath
659
 
                                 (u"/clients/"
660
 
                                  + self.name.replace(u".", u"_")))
661
 
        DBusObjectWithProperties.__init__(self, self.bus,
662
 
                                          self.dbus_object_path)
663
 
    
664
 
    @staticmethod
665
 
    def _datetime_to_dbus(dt, variant_level=0):
666
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
667
 
        return dbus.String(dt.isoformat(),
668
 
                           variant_level=variant_level)
669
 
    
670
 
    def enable(self):
671
 
        oldstate = getattr(self, u"enabled", False)
672
 
        r = Client.enable(self)
673
 
        if oldstate != self.enabled:
674
 
            # Emit D-Bus signals
675
 
            self.PropertyChanged(dbus.String(u"enabled"),
676
 
                                 dbus.Boolean(True, variant_level=1))
677
 
            self.PropertyChanged(
678
 
                dbus.String(u"last_enabled"),
679
 
                self._datetime_to_dbus(self.last_enabled,
680
 
                                       variant_level=1))
681
 
        return r
682
 
    
683
 
    def disable(self, signal = True):
684
 
        oldstate = getattr(self, u"enabled", False)
685
 
        r = Client.disable(self)
686
 
        if signal and oldstate != self.enabled:
687
 
            # Emit D-Bus signal
688
 
            self.PropertyChanged(dbus.String(u"enabled"),
689
 
                                 dbus.Boolean(False, variant_level=1))
690
 
        return r
691
 
    
692
 
    def __del__(self, *args, **kwargs):
693
 
        try:
694
 
            self.remove_from_connection()
695
 
        except LookupError:
696
 
            pass
697
 
        if hasattr(DBusObjectWithProperties, u"__del__"):
698
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
 
        Client.__del__(self, *args, **kwargs)
700
 
    
701
 
    def checker_callback(self, pid, condition, command,
702
 
                         *args, **kwargs):
703
 
        self.checker_callback_tag = None
704
 
        self.checker = None
705
 
        # Emit D-Bus signal
706
 
        self.PropertyChanged(dbus.String(u"checker_running"),
707
 
                             dbus.Boolean(False, variant_level=1))
708
 
        if os.WIFEXITED(condition):
709
 
            exitstatus = os.WEXITSTATUS(condition)
710
 
            # Emit D-Bus signal
711
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
712
 
                                  dbus.Int64(condition),
713
 
                                  dbus.String(command))
714
 
        else:
715
 
            # Emit D-Bus signal
716
 
            self.CheckerCompleted(dbus.Int16(-1),
717
 
                                  dbus.Int64(condition),
718
 
                                  dbus.String(command))
719
 
        
720
 
        return Client.checker_callback(self, pid, condition, command,
721
 
                                       *args, **kwargs)
722
 
    
723
 
    def checked_ok(self, *args, **kwargs):
724
 
        r = Client.checked_ok(self, *args, **kwargs)
725
 
        # Emit D-Bus signal
726
 
        self.PropertyChanged(
727
 
            dbus.String(u"last_checked_ok"),
728
 
            (self._datetime_to_dbus(self.last_checked_ok,
729
 
                                    variant_level=1)))
730
 
        return r
731
 
    
732
 
    def start_checker(self, *args, **kwargs):
733
 
        old_checker = self.checker
734
 
        if self.checker is not None:
735
 
            old_checker_pid = self.checker.pid
736
 
        else:
737
 
            old_checker_pid = None
738
 
        r = Client.start_checker(self, *args, **kwargs)
739
 
        # Only if new checker process was started
740
 
        if (self.checker is not None
741
 
            and old_checker_pid != self.checker.pid):
742
 
            # Emit D-Bus signal
743
 
            self.CheckerStarted(self.current_checker_command)
744
 
            self.PropertyChanged(
745
 
                dbus.String(u"checker_running"),
746
 
                dbus.Boolean(True, variant_level=1))
747
 
        return r
748
 
    
749
 
    def stop_checker(self, *args, **kwargs):
750
 
        old_checker = getattr(self, u"checker", None)
751
 
        r = Client.stop_checker(self, *args, **kwargs)
752
 
        if (old_checker is not None
753
 
            and getattr(self, u"checker", None) is None):
754
 
            self.PropertyChanged(dbus.String(u"checker_running"),
755
 
                                 dbus.Boolean(False, variant_level=1))
756
 
        return r
757
 
    
758
 
    ## D-Bus methods & signals
759
 
    _interface = u"se.bsnet.fukt.Mandos.Client"
760
 
    
761
 
    # CheckerCompleted - signal
762
 
    @dbus.service.signal(_interface, signature=u"nxs")
763
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
764
 
        "D-Bus signal"
765
 
        pass
766
 
    
767
 
    # CheckerStarted - signal
768
 
    @dbus.service.signal(_interface, signature=u"s")
769
 
    def CheckerStarted(self, command):
770
 
        "D-Bus signal"
771
 
        pass
772
 
    
773
 
    # PropertyChanged - signal
774
 
    @dbus.service.signal(_interface, signature=u"sv")
775
 
    def PropertyChanged(self, property, value):
776
 
        "D-Bus signal"
777
 
        pass
778
 
    
779
 
    # ReceivedSecret - signal
780
 
    @dbus.service.signal(_interface)
781
 
    def ReceivedSecret(self):
782
 
        "D-Bus signal"
783
 
        pass
784
 
    
785
 
    # Rejected - signal
786
 
    @dbus.service.signal(_interface)
787
 
    def Rejected(self):
788
 
        "D-Bus signal"
789
 
        pass
790
 
    
791
 
    # name - property
792
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
793
 
    def name_dbus_property(self):
794
 
        return dbus.String(self.name)
795
 
    
796
 
    # fingerprint - property
797
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
798
 
    def fingerprint_dbus_property(self):
799
 
        return dbus.String(self.fingerprint)
800
 
    
801
 
    # host - property
802
 
    @dbus_service_property(_interface, signature=u"s",
803
 
                           access=u"readwrite")
804
 
    def host_dbus_property(self, value=None):
805
 
        if value is None:       # get
806
 
            return dbus.String(self.host)
807
 
        self.host = value
808
 
        # Emit D-Bus signal
809
 
        self.PropertyChanged(dbus.String(u"host"),
810
 
                             dbus.String(value, variant_level=1))
811
 
    
812
 
    # created - property
813
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
814
 
    def created_dbus_property(self):
815
 
        return dbus.String(self._datetime_to_dbus(self.created))
816
 
    
817
 
    # last_enabled - property
818
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
819
 
    def last_enabled_dbus_property(self):
820
 
        if self.last_enabled is None:
821
 
            return dbus.String(u"")
822
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
823
 
    
824
 
    # enabled - property
825
 
    @dbus_service_property(_interface, signature=u"b",
826
 
                           access=u"readwrite")
827
 
    def enabled_dbus_property(self, value=None):
828
 
        if value is None:       # get
829
 
            return dbus.Boolean(self.enabled)
830
 
        if value:
831
 
            self.enable()
832
 
        else:
833
 
            self.disable()
834
 
    
835
 
    # last_checked_ok - property
836
 
    @dbus_service_property(_interface, signature=u"s", access=u"read")
837
 
    def last_checked_ok_dbus_property(self):
838
 
        if self.last_checked_ok is None:
839
 
            return dbus.String(u"")
840
 
        return dbus.String(self._datetime_to_dbus(self
841
 
                                                  .last_checked_ok))
842
 
    
843
 
    # timeout - property
844
 
    @dbus_service_property(_interface, signature=u"t",
845
 
                           access=u"readwrite")
846
 
    def timeout_dbus_property(self, value=None):
847
 
        if value is None:       # get
848
 
            return dbus.UInt64(self.timeout_milliseconds())
849
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
850
 
        # Emit D-Bus signal
851
 
        self.PropertyChanged(dbus.String(u"timeout"),
852
 
                             dbus.UInt64(value, variant_level=1))
853
 
        if getattr(self, u"disable_initiator_tag", None) is None:
854
 
            return
855
 
        # Reschedule timeout
856
 
        gobject.source_remove(self.disable_initiator_tag)
857
 
        self.disable_initiator_tag = None
858
 
        time_to_die = (self.
859
 
                       _timedelta_to_milliseconds((self
860
 
                                                   .last_checked_ok
861
 
                                                   + self.timeout)
862
 
                                                  - datetime.datetime
863
 
                                                  .utcnow()))
864
 
        if time_to_die <= 0:
865
 
            # The timeout has passed
866
 
            self.disable()
867
 
        else:
868
 
            self.disable_initiator_tag = (gobject.timeout_add
869
 
                                          (time_to_die, self.disable))
870
 
    
871
 
    # interval - property
872
 
    @dbus_service_property(_interface, signature=u"t",
873
 
                           access=u"readwrite")
874
 
    def interval_dbus_property(self, value=None):
875
 
        if value is None:       # get
876
 
            return dbus.UInt64(self.interval_milliseconds())
877
 
        self.interval = datetime.timedelta(0, 0, 0, value)
878
 
        # Emit D-Bus signal
879
 
        self.PropertyChanged(dbus.String(u"interval"),
880
 
                             dbus.UInt64(value, variant_level=1))
881
 
        if getattr(self, u"checker_initiator_tag", None) is None:
882
 
            return
883
 
        # Reschedule checker run
884
 
        gobject.source_remove(self.checker_initiator_tag)
885
 
        self.checker_initiator_tag = (gobject.timeout_add
886
 
                                      (value, self.start_checker))
887
 
        self.start_checker()    # Start one now, too
888
 
 
889
 
    # checker - property
890
 
    @dbus_service_property(_interface, signature=u"s",
891
 
                           access=u"readwrite")
892
 
    def checker_dbus_property(self, value=None):
893
 
        if value is None:       # get
894
 
            return dbus.String(self.checker_command)
895
 
        self.checker_command = value
896
 
        # Emit D-Bus signal
897
 
        self.PropertyChanged(dbus.String(u"checker"),
898
 
                             dbus.String(self.checker_command,
899
 
                                         variant_level=1))
900
 
    
901
 
    # checker_running - property
902
 
    @dbus_service_property(_interface, signature=u"b",
903
 
                           access=u"readwrite")
904
 
    def checker_running_dbus_property(self, value=None):
905
 
        if value is None:       # get
906
 
            return dbus.Boolean(self.checker is not None)
907
 
        if value:
908
 
            self.start_checker()
909
 
        else:
910
 
            self.stop_checker()
911
 
    
912
 
    # object_path - property
913
 
    @dbus_service_property(_interface, signature=u"o", access=u"read")
914
 
    def object_path_dbus_property(self):
915
 
        return self.dbus_object_path # is already a dbus.ObjectPath
916
 
    
917
 
    # secret = property xxx
918
 
    @dbus_service_property(_interface, signature=u"ay",
919
 
                           access=u"write", byte_arrays=True)
920
 
    def secret_dbus_property(self, value):
921
 
        self.secret = str(value)
922
 
    
923
 
    del _interface
924
 
 
925
 
 
926
 
class ClientHandler(socketserver.BaseRequestHandler, object):
927
 
    """A class to handle client connections.
928
 
    
929
 
    Instantiated once for each connection to handle it.
 
246
            return now < (self.last_seen + self.timeout)
 
247
 
 
248
 
 
249
def peer_certificate(session):
 
250
    # If not an OpenPGP certificate...
 
251
    if gnutls.library.functions.gnutls_certificate_type_get\
 
252
            (session._c_object) \
 
253
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
254
        # ...do the normal thing
 
255
        return session.peer_certificate
 
256
    list_size = ctypes.c_uint()
 
257
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
258
        (session._c_object, ctypes.byref(list_size))
 
259
    if list_size.value == 0:
 
260
        return None
 
261
    cert = cert_list[0]
 
262
    return ctypes.string_at(cert.data, cert.size)
 
263
 
 
264
 
 
265
def fingerprint(openpgp):
 
266
    # New empty GnuTLS certificate
 
267
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
268
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
269
        (ctypes.byref(crt))
 
270
    # New GnuTLS "datum" with the OpenPGP public key
 
271
    datum = gnutls.library.types.gnutls_datum_t\
 
272
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
273
                     ctypes.POINTER(ctypes.c_ubyte)),
 
274
         ctypes.c_uint(len(openpgp)))
 
275
    # Import the OpenPGP public key into the certificate
 
276
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
277
        (crt,
 
278
         ctypes.byref(datum),
 
279
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
280
    # New buffer for the fingerprint
 
281
    buffer = ctypes.create_string_buffer(20)
 
282
    buffer_length = ctypes.c_size_t()
 
283
    # Get the fingerprint from the certificate into the buffer
 
284
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
285
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
286
    # Deinit the certificate
 
287
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
288
    # Convert the buffer to a Python bytestring
 
289
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
290
    # Convert the bytestring to hexadecimal notation
 
291
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
292
    return hex_fpr
 
293
 
 
294
 
 
295
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
296
    """A TCP request handler class.
 
297
    Instantiated by IPv6_TCPServer for each request to handle it.
930
298
    Note: This will run in its own forked process."""
931
299
    
932
300
    def handle(self):
933
 
        logger.info(u"TCP connection from: %s",
934
 
                    unicode(self.client_address))
935
 
        logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
936
 
        # Open IPC pipe to parent process
937
 
        with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
938
 
            session = (gnutls.connection
939
 
                       .ClientSession(self.request,
940
 
                                      gnutls.connection
941
 
                                      .X509Credentials()))
942
 
            
943
 
            line = self.request.makefile().readline()
944
 
            logger.debug(u"Protocol version: %r", line)
945
 
            try:
946
 
                if int(line.strip().split()[0]) > 1:
947
 
                    raise RuntimeError
948
 
            except (ValueError, IndexError, RuntimeError), error:
949
 
                logger.error(u"Unknown protocol version: %s", error)
950
 
                return
951
 
            
952
 
            # Note: gnutls.connection.X509Credentials is really a
953
 
            # generic GnuTLS certificate credentials object so long as
954
 
            # no X.509 keys are added to it.  Therefore, we can use it
955
 
            # here despite using OpenPGP certificates.
956
 
            
957
 
            #priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
958
 
            #                      u"+AES-256-CBC", u"+SHA1",
959
 
            #                      u"+COMP-NULL", u"+CTYPE-OPENPGP",
960
 
            #                      u"+DHE-DSS"))
961
 
            # Use a fallback default, since this MUST be set.
962
 
            priority = self.server.gnutls_priority
963
 
            if priority is None:
964
 
                priority = u"NORMAL"
965
 
            (gnutls.library.functions
966
 
             .gnutls_priority_set_direct(session._c_object,
967
 
                                         priority, None))
968
 
            
969
 
            try:
970
 
                session.handshake()
971
 
            except gnutls.errors.GNUTLSError, error:
972
 
                logger.warning(u"Handshake failed: %s", error)
973
 
                # Do not run session.bye() here: the session is not
974
 
                # established.  Just abandon the request.
975
 
                return
976
 
            logger.debug(u"Handshake succeeded")
977
 
            try:
978
 
                fpr = self.fingerprint(self.peer_certificate(session))
979
 
            except (TypeError, gnutls.errors.GNUTLSError), error:
980
 
                logger.warning(u"Bad certificate: %s", error)
981
 
                session.bye()
982
 
                return
983
 
            logger.debug(u"Fingerprint: %s", fpr)
984
 
            
985
 
            for c in self.server.clients:
986
 
                if c.fingerprint == fpr:
987
 
                    client = c
988
 
                    break
989
 
            else:
990
 
                ipc.write(u"NOTFOUND %s %s\n"
991
 
                          % (fpr, unicode(self.client_address)))
992
 
                session.bye()
993
 
                return
994
 
            # Have to check if client.still_valid(), since it is
995
 
            # possible that the client timed out while establishing
996
 
            # the GnuTLS session.
997
 
            if not client.still_valid():
998
 
                ipc.write(u"INVALID %s\n" % client.name)
999
 
                session.bye()
1000
 
                return
1001
 
            ipc.write(u"SENDING %s\n" % client.name)
1002
 
            sent_size = 0
1003
 
            while sent_size < len(client.secret):
1004
 
                sent = session.send(client.secret[sent_size:])
1005
 
                logger.debug(u"Sent: %d, remaining: %d",
1006
 
                             sent, len(client.secret)
1007
 
                             - (sent_size + sent))
1008
 
                sent_size += sent
1009
 
            session.bye()
1010
 
    
1011
 
    @staticmethod
1012
 
    def peer_certificate(session):
1013
 
        "Return the peer's OpenPGP certificate as a bytestring"
1014
 
        # If not an OpenPGP certificate...
1015
 
        if (gnutls.library.functions
1016
 
            .gnutls_certificate_type_get(session._c_object)
1017
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1018
 
            # ...do the normal thing
1019
 
            return session.peer_certificate
1020
 
        list_size = ctypes.c_uint(1)
1021
 
        cert_list = (gnutls.library.functions
1022
 
                     .gnutls_certificate_get_peers
1023
 
                     (session._c_object, ctypes.byref(list_size)))
1024
 
        if not bool(cert_list) and list_size.value != 0:
1025
 
            raise gnutls.errors.GNUTLSError(u"error getting peer"
1026
 
                                            u" certificate")
1027
 
        if list_size.value == 0:
1028
 
            return None
1029
 
        cert = cert_list[0]
1030
 
        return ctypes.string_at(cert.data, cert.size)
1031
 
    
1032
 
    @staticmethod
1033
 
    def fingerprint(openpgp):
1034
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1035
 
        # New GnuTLS "datum" with the OpenPGP public key
1036
 
        datum = (gnutls.library.types
1037
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1038
 
                                             ctypes.POINTER
1039
 
                                             (ctypes.c_ubyte)),
1040
 
                                 ctypes.c_uint(len(openpgp))))
1041
 
        # New empty GnuTLS certificate
1042
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1043
 
        (gnutls.library.functions
1044
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1045
 
        # Import the OpenPGP public key into the certificate
1046
 
        (gnutls.library.functions
1047
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1048
 
                                    gnutls.library.constants
1049
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1050
 
        # Verify the self signature in the key
1051
 
        crtverify = ctypes.c_uint()
1052
 
        (gnutls.library.functions
1053
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1054
 
                                         ctypes.byref(crtverify)))
1055
 
        if crtverify.value != 0:
1056
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1057
 
            raise (gnutls.errors.CertificateSecurityError
1058
 
                   (u"Verify failed"))
1059
 
        # New buffer for the fingerprint
1060
 
        buf = ctypes.create_string_buffer(20)
1061
 
        buf_len = ctypes.c_size_t()
1062
 
        # Get the fingerprint from the certificate into the buffer
1063
 
        (gnutls.library.functions
1064
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1065
 
                                             ctypes.byref(buf_len)))
1066
 
        # Deinit the certificate
1067
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1068
 
        # Convert the buffer to a Python bytestring
1069
 
        fpr = ctypes.string_at(buf, buf_len.value)
1070
 
        # Convert the bytestring to hexadecimal notation
1071
 
        hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1072
 
        return hex_fpr
1073
 
 
1074
 
 
1075
 
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1076
 
    """Like socketserver.ForkingMixIn, but also pass a pipe."""
1077
 
    def process_request(self, request, client_address):
1078
 
        """Overrides and wraps the original process_request().
1079
 
        
1080
 
        This function creates a new pipe in self.pipe
1081
 
        """
1082
 
        self.pipe = os.pipe()
1083
 
        super(ForkingMixInWithPipe,
1084
 
              self).process_request(request, client_address)
1085
 
        os.close(self.pipe[1])  # close write end
1086
 
        self.add_pipe(self.pipe[0])
1087
 
    def add_pipe(self, pipe):
1088
 
        """Dummy function; override as necessary"""
1089
 
        os.close(pipe)
1090
 
 
1091
 
 
1092
 
class IPv6_TCPServer(ForkingMixInWithPipe,
1093
 
                     socketserver.TCPServer, object):
1094
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1095
 
    
 
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())
 
310
        
 
311
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
312
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
313
        #                "+DHE-DSS"))
 
314
        priority = "SECURE256"
 
315
        
 
316
        gnutls.library.functions.gnutls_priority_set_direct\
 
317
            (session._c_object, priority, None);
 
318
        
 
319
        try:
 
320
            session.handshake()
 
321
        except gnutls.errors.GNUTLSError, error:
 
322
            if debug:
 
323
                sys.stderr.write(u"Handshake failed: %s\n" % error)
 
324
            # Do not run session.bye() here: the session is not
 
325
            # established.  Just abandon the request.
 
326
            return
 
327
        try:
 
328
            fpr = fingerprint(peer_certificate(session))
 
329
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
330
            if debug:
 
331
                sys.stderr.write(u"Bad certificate: %s\n" % error)
 
332
            session.bye()
 
333
            return
 
334
        if debug:
 
335
            sys.stderr.write(u"Fingerprint: %s\n" % fpr)
 
336
        client = None
 
337
        for c in clients:
 
338
            if c.fingerprint == fpr:
 
339
                client = c
 
340
                break
 
341
        # Have to check if client.still_valid(), since it is possible
 
342
        # that the client timed out while establishing the GnuTLS
 
343
        # session.
 
344
        if (not client) or (not client.still_valid()):
 
345
            if debug:
 
346
                if client:
 
347
                    sys.stderr.write(u"Client %(name)s is invalid\n"
 
348
                                     % vars(client))
 
349
                else:
 
350
                    sys.stderr.write(u"Client not found for "
 
351
                                     u"fingerprint: %s\n" % fpr)
 
352
            session.bye()
 
353
            return
 
354
        sent_size = 0
 
355
        while sent_size < len(client.secret):
 
356
            sent = session.send(client.secret[sent_size:])
 
357
            if debug:
 
358
                sys.stderr.write(u"Sent: %d, remaining: %d\n"
 
359
                                 % (sent, len(client.secret)
 
360
                                    - (sent_size + sent)))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1096
367
    Attributes:
1097
 
        enabled:        Boolean; whether this server is activated yet
1098
 
        interface:      None or a network interface name (string)
1099
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1100
370
    """
1101
 
    def __init__(self, server_address, RequestHandlerClass,
1102
 
                 interface=None, use_ipv6=True):
1103
 
        self.interface = interface
1104
 
        if use_ipv6:
1105
 
            self.address_family = socket.AF_INET6
1106
 
        socketserver.TCPServer.__init__(self, server_address,
1107
 
                                        RequestHandlerClass)
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
1108
380
    def server_bind(self):
1109
381
        """This overrides the normal server_bind() function
1110
382
        to bind to an interface if one was specified, and also NOT to
1111
383
        bind to an address or port if they were not specified."""
1112
 
        if self.interface is not None:
1113
 
            if SO_BINDTODEVICE is None:
1114
 
                logger.error(u"SO_BINDTODEVICE does not exist;"
1115
 
                             u" cannot bind to interface %s",
1116
 
                             self.interface)
1117
 
            else:
1118
 
                try:
1119
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1120
 
                                           SO_BINDTODEVICE,
1121
 
                                           str(self.interface
1122
 
                                               + u'\0'))
1123
 
                except socket.error, error:
1124
 
                    if error[0] == errno.EPERM:
1125
 
                        logger.error(u"No permission to"
1126
 
                                     u" bind to interface %s",
1127
 
                                     self.interface)
1128
 
                    elif error[0] == errno.ENOPROTOOPT:
1129
 
                        logger.error(u"SO_BINDTODEVICE not available;"
1130
 
                                     u" cannot bind to interface %s",
1131
 
                                     self.interface)
1132
 
                    else:
1133
 
                        raise
 
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
 
388
            try:
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    sys.stderr.write(u"Warning: No permission to" \
 
395
                                     u" bind to interface %s\n"
 
396
                                     % self.options.interface)
 
397
                else:
 
398
                    raise error
1134
399
        # Only bind(2) the socket if we really need to.
1135
400
        if self.server_address[0] or self.server_address[1]:
1136
401
            if not self.server_address[0]:
1137
 
                if self.address_family == socket.AF_INET6:
1138
 
                    any_address = u"::" # in6addr_any
1139
 
                else:
1140
 
                    any_address = socket.INADDR_ANY
1141
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
1142
404
                                       self.server_address[1])
1143
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
1144
406
                self.server_address = (self.server_address[0],
1145
407
                                       0)
1146
 
#                 if self.interface:
1147
 
#                     self.server_address = (self.server_address[0],
1148
 
#                                            0, # port
1149
 
#                                            0, # flowinfo
1150
 
#                                            if_nametoindex
1151
 
#                                            (self.interface))
1152
 
            return socketserver.TCPServer.server_bind(self)
1153
 
 
1154
 
 
1155
 
class MandosServer(IPv6_TCPServer):
1156
 
    """Mandos server.
1157
 
    
1158
 
    Attributes:
1159
 
        clients:        set of Client objects
1160
 
        gnutls_priority GnuTLS priority string
1161
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1162
 
    
1163
 
    Assumes a gobject.MainLoop event loop.
1164
 
    """
1165
 
    def __init__(self, server_address, RequestHandlerClass,
1166
 
                 interface=None, use_ipv6=True, clients=None,
1167
 
                 gnutls_priority=None, use_dbus=True):
1168
 
        self.enabled = False
1169
 
        self.clients = clients
1170
 
        if self.clients is None:
1171
 
            self.clients = set()
1172
 
        self.use_dbus = use_dbus
1173
 
        self.gnutls_priority = gnutls_priority
1174
 
        IPv6_TCPServer.__init__(self, server_address,
1175
 
                                RequestHandlerClass,
1176
 
                                interface = interface,
1177
 
                                use_ipv6 = use_ipv6)
1178
 
    def server_activate(self):
1179
 
        if self.enabled:
1180
 
            return socketserver.TCPServer.server_activate(self)
1181
 
    def enable(self):
1182
 
        self.enabled = True
1183
 
    def add_pipe(self, pipe):
1184
 
        # Call "handle_ipc" for both data and EOF events
1185
 
        gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1186
 
                             self.handle_ipc)
1187
 
    def handle_ipc(self, source, condition, file_objects={}):
1188
 
        condition_names = {
1189
 
            gobject.IO_IN: u"IN",   # There is data to read.
1190
 
            gobject.IO_OUT: u"OUT", # Data can be written (without
1191
 
                                    # blocking).
1192
 
            gobject.IO_PRI: u"PRI", # There is urgent data to read.
1193
 
            gobject.IO_ERR: u"ERR", # Error condition.
1194
 
            gobject.IO_HUP: u"HUP"  # Hung up (the connection has been
1195
 
                                    # broken, usually for pipes and
1196
 
                                    # sockets).
1197
 
            }
1198
 
        conditions_string = ' | '.join(name
1199
 
                                       for cond, name in
1200
 
                                       condition_names.iteritems()
1201
 
                                       if cond & condition)
1202
 
        logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1203
 
                     conditions_string)
1204
 
        
1205
 
        # Turn the pipe file descriptor into a Python file object
1206
 
        if source not in file_objects:
1207
 
            file_objects[source] = os.fdopen(source, u"r", 1)
1208
 
        
1209
 
        # Read a line from the file object
1210
 
        cmdline = file_objects[source].readline()
1211
 
        if not cmdline:             # Empty line means end of file
1212
 
            # close the IPC pipe
1213
 
            file_objects[source].close()
1214
 
            del file_objects[source]
1215
 
            
1216
 
            # Stop calling this function
1217
 
            return False
1218
 
        
1219
 
        logger.debug(u"IPC command: %r", cmdline)
1220
 
        
1221
 
        # Parse and act on command
1222
 
        cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1223
 
        
1224
 
        if cmd == u"NOTFOUND":
1225
 
            logger.warning(u"Client not found for fingerprint: %s",
1226
 
                           args)
1227
 
            if self.use_dbus:
1228
 
                # Emit D-Bus signal
1229
 
                mandos_dbus_service.ClientNotFound(args)
1230
 
        elif cmd == u"INVALID":
1231
 
            for client in self.clients:
1232
 
                if client.name == args:
1233
 
                    logger.warning(u"Client %s is invalid", args)
1234
 
                    if self.use_dbus:
1235
 
                        # Emit D-Bus signal
1236
 
                        client.Rejected()
1237
 
                    break
1238
 
            else:
1239
 
                logger.error(u"Unknown client %s is invalid", args)
1240
 
        elif cmd == u"SENDING":
1241
 
            for client in self.clients:
1242
 
                if client.name == args:
1243
 
                    logger.info(u"Sending secret to %s", client.name)
1244
 
                    client.checked_ok()
1245
 
                    if self.use_dbus:
1246
 
                        # Emit D-Bus signal
1247
 
                        client.ReceivedSecret()
1248
 
                    break
1249
 
            else:
1250
 
                logger.error(u"Sending secret to unknown client %s",
1251
 
                             args)
1252
 
        else:
1253
 
            logger.error(u"Unknown IPC command: %r", cmdline)
1254
 
        
1255
 
        # Keep calling this function
1256
 
        return True
 
408
            return super(type(self), self).server_bind()
1257
409
 
1258
410
 
1259
411
def string_to_delta(interval):
1260
412
    """Parse a string and return a datetime.timedelta
1261
 
    
1262
 
    >>> string_to_delta(u'7d')
 
413
 
 
414
    >>> string_to_delta('7d')
1263
415
    datetime.timedelta(7)
1264
 
    >>> string_to_delta(u'60s')
 
416
    >>> string_to_delta('60s')
1265
417
    datetime.timedelta(0, 60)
1266
 
    >>> string_to_delta(u'60m')
 
418
    >>> string_to_delta('60m')
1267
419
    datetime.timedelta(0, 3600)
1268
 
    >>> string_to_delta(u'24h')
 
420
    >>> string_to_delta('24h')
1269
421
    datetime.timedelta(1)
1270
422
    >>> string_to_delta(u'1w')
1271
423
    datetime.timedelta(7)
1272
 
    >>> string_to_delta(u'5m 30s')
1273
 
    datetime.timedelta(0, 330)
1274
424
    """
1275
 
    timevalue = datetime.timedelta(0)
1276
 
    for s in interval.split():
1277
 
        try:
1278
 
            suffix = unicode(s[-1])
1279
 
            value = int(s[:-1])
1280
 
            if suffix == u"d":
1281
 
                delta = datetime.timedelta(value)
1282
 
            elif suffix == u"s":
1283
 
                delta = datetime.timedelta(0, value)
1284
 
            elif suffix == u"m":
1285
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
1286
 
            elif suffix == u"h":
1287
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1288
 
            elif suffix == u"w":
1289
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1290
 
            else:
1291
 
                raise ValueError
1292
 
        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:
1293
439
            raise ValueError
1294
 
        timevalue += delta
1295
 
    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()
 
477
 
 
478
 
 
479
def server_state_changed(state):
 
480
    """From the Avahi server example code"""
 
481
    if state == avahi.SERVER_COLLISION:
 
482
        sys.stderr.write(u"WARNING: Server name collision\n")
 
483
        remove_service()
 
484
    elif state == avahi.SERVER_RUNNING:
 
485
        add_service()
 
486
 
 
487
 
 
488
def entry_group_state_changed(state, error):
 
489
    """From the Avahi server example code"""
 
490
    global serviceName, server, rename_count
 
491
    
 
492
    if debug:
 
493
        sys.stderr.write(u"state change: %i\n" % state)
 
494
    
 
495
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
496
        if debug:
 
497
            sys.stderr.write(u"Service established.\n")
 
498
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
499
        
 
500
        rename_count = rename_count - 1
 
501
        if rename_count > 0:
 
502
            name = server.GetAlternativeServiceName(name)
 
503
            sys.stderr.write(u"WARNING: Service name collision, "
 
504
                             u"changing name to '%s' ...\n" % name)
 
505
            remove_service()
 
506
            add_service()
 
507
            
 
508
        else:
 
509
            sys.stderr.write(u"ERROR: No suitable service name found "
 
510
                             u"after %i retries, exiting.\n"
 
511
                             % n_rename)
 
512
            main_loop.quit()
 
513
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
514
        sys.stderr.write(u"Error in group state changed %s\n"
 
515
                         % unicode(error))
 
516
        main_loop.quit()
 
517
        return
1296
518
 
1297
519
 
1298
520
def if_nametoindex(interface):
1299
 
    """Call the C function if_nametoindex(), or equivalent
1300
 
    
1301
 
    Note: This function cannot accept a unicode string."""
1302
 
    global if_nametoindex
 
521
    """Call the C function if_nametoindex()"""
1303
522
    try:
1304
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1305
 
                          (ctypes.util.find_library(u"c"))
1306
 
                          .if_nametoindex)
 
523
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
524
        return libc.if_nametoindex(interface)
1307
525
    except (OSError, AttributeError):
1308
 
        logger.warning(u"Doing if_nametoindex the hard way")
1309
 
        def if_nametoindex(interface):
1310
 
            "Get an interface index the hard way, i.e. using fcntl()"
1311
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1312
 
            with closing(socket.socket()) as s:
1313
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1314
 
                                    struct.pack(str(u"16s16x"),
1315
 
                                                interface))
1316
 
            interface_index = struct.unpack(str(u"I"),
1317
 
                                            ifreq[16:20])[0]
1318
 
            return interface_index
1319
 
    return if_nametoindex(interface)
1320
 
 
1321
 
 
1322
 
def daemon(nochdir = False, noclose = False):
1323
 
    """See daemon(3).  Standard BSD Unix function.
1324
 
    
1325
 
    This should really exist as os.daemon, but it doesn't (yet)."""
1326
 
    if os.fork():
1327
 
        sys.exit()
1328
 
    os.setsid()
1329
 
    if not nochdir:
1330
 
        os.chdir(u"/")
1331
 
    if os.fork():
1332
 
        sys.exit()
1333
 
    if not noclose:
1334
 
        # Close all standard open file descriptors
1335
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1336
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1337
 
            raise OSError(errno.ENODEV,
1338
 
                          u"/dev/null not a character device")
1339
 
        os.dup2(null, sys.stdin.fileno())
1340
 
        os.dup2(null, sys.stdout.fileno())
1341
 
        os.dup2(null, sys.stderr.fileno())
1342
 
        if null > 2:
1343
 
            os.close(null)
1344
 
 
1345
 
 
1346
 
def main():
1347
 
    
1348
 
    ##################################################################
1349
 
    # Parsing of options, both command line and config file
1350
 
    
1351
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
1352
 
    parser.add_option("-i", u"--interface", type=u"string",
1353
 
                      metavar="IF", help=u"Bind to interface IF")
1354
 
    parser.add_option("-a", u"--address", type=u"string",
1355
 
                      help=u"Address to listen for requests on")
1356
 
    parser.add_option("-p", u"--port", type=u"int",
1357
 
                      help=u"Port number to receive requests on")
1358
 
    parser.add_option("--check", action=u"store_true",
1359
 
                      help=u"Run self-test")
1360
 
    parser.add_option("--debug", action=u"store_true",
1361
 
                      help=u"Debug mode; run in foreground and log to"
1362
 
                      u" terminal")
1363
 
    parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1364
 
                      u" priority string (see GnuTLS documentation)")
1365
 
    parser.add_option("--servicename", type=u"string",
1366
 
                      metavar=u"NAME", help=u"Zeroconf service name")
1367
 
    parser.add_option("--configdir", type=u"string",
1368
 
                      default=u"/etc/mandos", metavar=u"DIR",
1369
 
                      help=u"Directory to search for configuration"
1370
 
                      u" files")
1371
 
    parser.add_option("--no-dbus", action=u"store_false",
1372
 
                      dest=u"use_dbus", help=u"Do not provide D-Bus"
1373
 
                      u" system bus interface")
1374
 
    parser.add_option("--no-ipv6", action=u"store_false",
1375
 
                      dest=u"use_ipv6", help=u"Do not use IPv6")
1376
 
    options = parser.parse_args()[0]
 
526
        if "struct" not in sys.modules:
 
527
            import struct
 
528
        if "fcntl" not in sys.modules:
 
529
            import fcntl
 
530
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
531
        s = socket.socket()
 
532
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
533
                            struct.pack("16s16x", interface))
 
534
        s.close()
 
535
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
536
        return interface_index
 
537
 
 
538
 
 
539
if __name__ == '__main__':
 
540
    parser = OptionParser()
 
541
    parser.add_option("-i", "--interface", type="string",
 
542
                      default=None, metavar="IF",
 
543
                      help="Bind to interface IF")
 
544
    parser.add_option("--cert", type="string", default="cert.pem",
 
545
                      metavar="FILE",
 
546
                      help="Public key certificate PEM file to use")
 
547
    parser.add_option("--key", type="string", default="key.pem",
 
548
                      metavar="FILE",
 
549
                      help="Private key PEM file to use")
 
550
    parser.add_option("--ca", type="string", default="ca.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Authority certificate PEM file to use")
 
553
    parser.add_option("--crl", type="string", default="crl.pem",
 
554
                      metavar="FILE",
 
555
                      help="Certificate Revokation List PEM file to use")
 
556
    parser.add_option("-p", "--port", type="int", default=None,
 
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")
 
564
    parser.add_option("--check", action="store_true", default=False,
 
565
                      help="Run self-test")
 
566
    parser.add_option("--debug", action="store_true", default=False,
 
567
                      help="Debug mode")
 
568
    (options, args) = parser.parse_args()
1377
569
    
1378
570
    if options.check:
1379
571
        import doctest
1380
572
        doctest.testmod()
1381
573
        sys.exit()
1382
574
    
1383
 
    # Default values for config file for server-global settings
1384
 
    server_defaults = { u"interface": u"",
1385
 
                        u"address": u"",
1386
 
                        u"port": u"",
1387
 
                        u"debug": u"False",
1388
 
                        u"priority":
1389
 
                        u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1390
 
                        u"servicename": u"Mandos",
1391
 
                        u"use_dbus": u"True",
1392
 
                        u"use_ipv6": u"True",
1393
 
                        }
1394
 
    
1395
 
    # Parse config file for server-global settings
1396
 
    server_config = configparser.SafeConfigParser(server_defaults)
1397
 
    del server_defaults
1398
 
    server_config.read(os.path.join(options.configdir,
1399
 
                                    u"mandos.conf"))
1400
 
    # Convert the SafeConfigParser object to a dict
1401
 
    server_settings = server_config.defaults()
1402
 
    # Use the appropriate methods on the non-string config options
1403
 
    for option in (u"debug", u"use_dbus", u"use_ipv6"):
1404
 
        server_settings[option] = server_config.getboolean(u"DEFAULT",
1405
 
                                                           option)
1406
 
    if server_settings["port"]:
1407
 
        server_settings["port"] = server_config.getint(u"DEFAULT",
1408
 
                                                       u"port")
1409
 
    del server_config
1410
 
    
1411
 
    # Override the settings from the config file with command line
1412
 
    # options, if set.
1413
 
    for option in (u"interface", u"address", u"port", u"debug",
1414
 
                   u"priority", u"servicename", u"configdir",
1415
 
                   u"use_dbus", u"use_ipv6"):
1416
 
        value = getattr(options, option)
1417
 
        if value is not None:
1418
 
            server_settings[option] = value
1419
 
    del options
1420
 
    # Force all strings to be unicode
1421
 
    for option in server_settings.keys():
1422
 
        if type(server_settings[option]) is str:
1423
 
            server_settings[option] = unicode(server_settings[option])
1424
 
    # Now we have our good server settings in "server_settings"
1425
 
    
1426
 
    ##################################################################
1427
 
    
1428
 
    # For convenience
1429
 
    debug = server_settings[u"debug"]
1430
 
    use_dbus = server_settings[u"use_dbus"]
1431
 
    use_ipv6 = server_settings[u"use_ipv6"]
1432
 
    
1433
 
    if not debug:
1434
 
        syslogger.setLevel(logging.WARNING)
1435
 
        console.setLevel(logging.WARNING)
1436
 
    
1437
 
    if server_settings[u"servicename"] != u"Mandos":
1438
 
        syslogger.setFormatter(logging.Formatter
1439
 
                               (u'Mandos (%s) [%%(process)d]:'
1440
 
                                u' %%(levelname)s: %%(message)s'
1441
 
                                % server_settings[u"servicename"]))
1442
 
    
1443
 
    # Parse config file with clients
1444
 
    client_defaults = { u"timeout": u"1h",
1445
 
                        u"interval": u"5m",
1446
 
                        u"checker": u"fping -q -- %%(host)s",
1447
 
                        u"host": u"",
1448
 
                        }
1449
 
    client_config = configparser.SafeConfigParser(client_defaults)
1450
 
    client_config.read(os.path.join(server_settings[u"configdir"],
1451
 
                                    u"clients.conf"))
1452
 
    
1453
 
    global mandos_dbus_service
1454
 
    mandos_dbus_service = None
1455
 
    
1456
 
    tcp_server = MandosServer((server_settings[u"address"],
1457
 
                               server_settings[u"port"]),
1458
 
                              ClientHandler,
1459
 
                              interface=server_settings[u"interface"],
1460
 
                              use_ipv6=use_ipv6,
1461
 
                              gnutls_priority=
1462
 
                              server_settings[u"priority"],
1463
 
                              use_dbus=use_dbus)
1464
 
    pidfilename = u"/var/run/mandos.pid"
1465
 
    try:
1466
 
        pidfile = open(pidfilename, u"w")
1467
 
    except IOError:
1468
 
        logger.error(u"Could not open file %r", pidfilename)
1469
 
    
1470
 
    try:
1471
 
        uid = pwd.getpwnam(u"_mandos").pw_uid
1472
 
        gid = pwd.getpwnam(u"_mandos").pw_gid
1473
 
    except KeyError:
1474
 
        try:
1475
 
            uid = pwd.getpwnam(u"mandos").pw_uid
1476
 
            gid = pwd.getpwnam(u"mandos").pw_gid
1477
 
        except KeyError:
1478
 
            try:
1479
 
                uid = pwd.getpwnam(u"nobody").pw_uid
1480
 
                gid = pwd.getpwnam(u"nobody").pw_gid
1481
 
            except KeyError:
1482
 
                uid = 65534
1483
 
                gid = 65534
1484
 
    try:
1485
 
        os.setgid(gid)
1486
 
        os.setuid(uid)
1487
 
    except OSError, error:
1488
 
        if error[0] != errno.EPERM:
1489
 
            raise error
1490
 
    
1491
 
    # Enable all possible GnuTLS debugging
1492
 
    if debug:
1493
 
        # "Use a log level over 10 to enable all debugging options."
1494
 
        # - GnuTLS manual
1495
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1496
 
        
1497
 
        @gnutls.library.types.gnutls_log_func
1498
 
        def debug_gnutls(level, string):
1499
 
            logger.debug(u"GnuTLS: %s", string[:-1])
1500
 
        
1501
 
        (gnutls.library.functions
1502
 
         .gnutls_global_set_log_function(debug_gnutls))
1503
 
    
1504
 
    global main_loop
1505
 
    # 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
1506
592
    DBusGMainLoop(set_as_default=True )
1507
593
    main_loop = gobject.MainLoop()
1508
594
    bus = dbus.SystemBus()
 
595
    server = dbus.Interface(
 
596
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
597
            avahi.DBUS_INTERFACE_SERVER )
1509
598
    # End of Avahi example code
1510
 
    if use_dbus:
1511
 
        bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1512
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1513
 
    service = AvahiService(name = server_settings[u"servicename"],
1514
 
                           servicetype = u"_mandos._tcp",
1515
 
                           protocol = protocol, bus = bus)
1516
 
    if server_settings["interface"]:
1517
 
        service.interface = (if_nametoindex
1518
 
                             (str(server_settings[u"interface"])))
1519
 
    
1520
 
    client_class = Client
1521
 
    if use_dbus:
1522
 
        client_class = functools.partial(ClientDBus, bus = bus)
1523
 
    tcp_server.clients.update(set(
1524
 
            client_class(name = section,
1525
 
                         config= dict(client_config.items(section)))
1526
 
            for section in client_config.sections()))
1527
 
    if not tcp_server.clients:
1528
 
        logger.warning(u"No clients defined")
1529
 
    
 
599
    
 
600
    debug = options.debug
 
601
    
 
602
    clients = Set()
 
603
    def remove_from_clients(client):
 
604
        clients.remove(client)
 
605
        if not clients:
 
606
            if debug:
 
607
                sys.stderr.write(u"No clients left, exiting\n")
 
608
            main_loop.quit()
 
609
    
 
610
    clients.update(Set(Client(name=section, options=options,
 
611
                              stop_hook = remove_from_clients,
 
612
                              **(dict(client_config\
 
613
                                      .items(section))))
 
614
                       for section in client_config.sections()))
 
615
    for client in clients:
 
616
        client.start()
 
617
    
 
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]
1530
624
    if debug:
1531
 
        # Redirect stdin so all checkers get /dev/null
1532
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1533
 
        os.dup2(null, sys.stdin.fileno())
1534
 
        if null > 2:
1535
 
            os.close(null)
1536
 
    else:
1537
 
        # No console logging
1538
 
        logger.removeHandler(console)
1539
 
        # Close all input and output, do double fork, etc.
1540
 
        daemon()
1541
 
    
1542
 
    try:
1543
 
        with closing(pidfile):
1544
 
            pid = os.getpid()
1545
 
            pidfile.write(str(pid) + "\n")
1546
 
        del pidfile
1547
 
    except IOError:
1548
 
        logger.error(u"Could not write to file %r with PID %d",
1549
 
                     pidfilename, pid)
1550
 
    except NameError:
1551
 
        # "pidfile" was never created
1552
 
        pass
1553
 
    del pidfilename
1554
 
    
1555
 
    def cleanup():
1556
 
        "Cleanup function; run on exit"
1557
 
        service.cleanup()
1558
 
        
1559
 
        while tcp_server.clients:
1560
 
            client = tcp_server.clients.pop()
1561
 
            client.disable_hook = None
1562
 
            client.disable()
1563
 
    
1564
 
    atexit.register(cleanup)
1565
 
    
1566
 
    if not debug:
1567
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1568
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1569
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1570
 
    
1571
 
    if use_dbus:
1572
 
        class MandosDBusService(dbus.service.Object):
1573
 
            """A D-Bus proxy object"""
1574
 
            def __init__(self):
1575
 
                dbus.service.Object.__init__(self, bus, u"/")
1576
 
            _interface = u"se.bsnet.fukt.Mandos"
1577
 
            
1578
 
            @dbus.service.signal(_interface, signature=u"oa{sv}")
1579
 
            def ClientAdded(self, objpath, properties):
1580
 
                "D-Bus signal"
1581
 
                pass
1582
 
            
1583
 
            @dbus.service.signal(_interface, signature=u"s")
1584
 
            def ClientNotFound(self, fingerprint):
1585
 
                "D-Bus signal"
1586
 
                pass
1587
 
            
1588
 
            @dbus.service.signal(_interface, signature=u"os")
1589
 
            def ClientRemoved(self, objpath, name):
1590
 
                "D-Bus signal"
1591
 
                pass
1592
 
            
1593
 
            @dbus.service.method(_interface, out_signature=u"ao")
1594
 
            def GetAllClients(self):
1595
 
                "D-Bus method"
1596
 
                return dbus.Array(c.dbus_object_path
1597
 
                                  for c in tcp_server.clients)
1598
 
            
1599
 
            @dbus.service.method(_interface,
1600
 
                                 out_signature=u"a{oa{sv}}")
1601
 
            def GetAllClientsWithProperties(self):
1602
 
                "D-Bus method"
1603
 
                return dbus.Dictionary(
1604
 
                    ((c.dbus_object_path, c.GetAll(u""))
1605
 
                     for c in tcp_server.clients),
1606
 
                    signature=u"oa{sv}")
1607
 
            
1608
 
            @dbus.service.method(_interface, in_signature=u"o")
1609
 
            def RemoveClient(self, object_path):
1610
 
                "D-Bus method"
1611
 
                for c in tcp_server.clients:
1612
 
                    if c.dbus_object_path == object_path:
1613
 
                        tcp_server.clients.remove(c)
1614
 
                        c.remove_from_connection()
1615
 
                        # Don't signal anything except ClientRemoved
1616
 
                        c.disable(signal=False)
1617
 
                        # Emit D-Bus signal
1618
 
                        self.ClientRemoved(object_path, c.name)
1619
 
                        return
1620
 
                raise KeyError
1621
 
            
1622
 
            del _interface
1623
 
        
1624
 
        mandos_dbus_service = MandosDBusService()
1625
 
    
1626
 
    for client in tcp_server.clients:
1627
 
        if use_dbus:
1628
 
            # Emit D-Bus signal
1629
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path,
1630
 
                                            client.GetAll(u""))
1631
 
        client.enable()
1632
 
    
1633
 
    tcp_server.enable()
1634
 
    tcp_server.server_activate()
1635
 
    
1636
 
    # Find out what port we got
1637
 
    service.port = tcp_server.socket.getsockname()[1]
1638
 
    if use_ipv6:
1639
 
        logger.info(u"Now listening on address %r, port %d,"
1640
 
                    " flowinfo %d, scope_id %d"
1641
 
                    % tcp_server.socket.getsockname())
1642
 
    else:                       # IPv4
1643
 
        logger.info(u"Now listening on address %r, port %d"
1644
 
                    % tcp_server.socket.getsockname())
1645
 
    
1646
 
    #service.interface = tcp_server.socket.getsockname()[3]
1647
 
    
1648
 
    try:
1649
 
        # From the Avahi example code
1650
 
        try:
1651
 
            service.activate()
1652
 
        except dbus.exceptions.DBusException, error:
1653
 
            logger.critical(u"DBusException: %s", error)
1654
 
            sys.exit(1)
1655
 
        # End of Avahi example code
1656
 
        
1657
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1658
 
                             lambda *args, **kwargs:
1659
 
                             (tcp_server.handle_request
1660
 
                              (*args[2:], **kwargs) or True))
1661
 
        
1662
 
        logger.debug(u"Starting main loop")
 
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)
 
639
    try:
1663
640
        main_loop.run()
1664
 
    except AvahiError, error:
1665
 
        logger.critical(u"AvahiError: %s", error)
1666
 
        sys.exit(1)
1667
641
    except KeyboardInterrupt:
1668
 
        if debug:
1669
 
            print >> sys.stderr
1670
 
        logger.debug(u"Server received KeyboardInterrupt")
1671
 
    logger.debug(u"Server exiting")
 
642
        print
 
643
    
 
644
    # Cleanup here
1672
645
 
1673
 
if __name__ == '__main__':
1674
 
    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()