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- Committer: Teddy Hogeborn
- Date: 2011-03-17 18:13:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20110317181340-nf79nlcbilqx3ccg
* debian/control (mandos-client): Conflict with correct version of
dropbear.
dropbear.
- files removed:
- debian/mandos-client.examples
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos-monitor
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#
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# Mandos Monitor - Control and monitor the Mandos server
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#
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# Copyright © 2009-2014 Teddy Hogeborn
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# Copyright © 2009-2014 Björn Påhlsson
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# Copyright © 2009-2011 Teddy Hogeborn
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# Copyright © 2009-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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24
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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try:
29
from future_builtins import *
30
except ImportError:
31
pass
25
from __future__ import division, absolute_import, print_function, unicode_literals
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26
33
27
import sys
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28
import os
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import signal
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import datetime
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import urwid
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from dbus.mainloop.glib import DBusGMainLoop
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try:
43
import gobject
44
except ImportError:
45
from gi.repository import GObject as gobject
37
import gobject
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import dbus
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40
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import UserList
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49
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import locale
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44
51
if sys.version_info[0] == 2:
52
str = unicode
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54
45
locale.setlocale(locale.LC_ALL, '')
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56
47
import logging
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48
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
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49
59
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# Some useful constants
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domain = 'se.recompile'
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domain = 'se.bsnet.fukt'
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server_interface = domain + '.Mandos'
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53
client_interface = domain + '.Mandos.Client'
63
version = "1.6.4"
54
version = "1.3.0"
55
56
# Always run in monochrome mode
57
urwid.curses_display.curses.has_colors = lambda : False
58
59
# Urwid doesn't support blinking, but we want it. Since we have no
60
# use for underline on its own, we make underline also always blink.
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urwid.curses_display.curses.A_UNDERLINE |= (
62
urwid.curses_display.curses.A_BLINK)
64
63
65
64
def isoformat_to_datetime(iso):
66
65
"Parse an ISO 8601 date string to a datetime.datetime()"
83
82
properties and calls a hook function when any of them are
84
83
changed.
85
84
"""
86
def __init__(self, proxy_object=None, properties=None, **kwargs):
85
def __init__(self, proxy_object=None, *args, **kwargs):
87
86
self.proxy = proxy_object # Mandos Client proxy object
88
self.properties = dict() if properties is None else properties
89
self.property_changed_match = (
90
self.proxy.connect_to_signal("PropertyChanged",
91
self._property_changed,
92
client_interface,
93
byte_arrays=True))
94
95
if properties is None:
96
self.properties.update(
97
self.proxy.GetAll(client_interface,
98
dbus_interface
99
= dbus.PROPERTIES_IFACE))
100
101
super(MandosClientPropertyCache, self).__init__(**kwargs)
102
103
def _property_changed(self, property, value):
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"""Helper which takes positional arguments"""
105
return self.property_changed(property=property, value=value)
87
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self.properties = dict()
89
self.proxy.connect_to_signal("PropertyChanged",
90
self.property_changed,
91
client_interface,
92
byte_arrays=True)
93
94
self.properties.update(
95
self.proxy.GetAll(client_interface,
96
dbus_interface = dbus.PROPERTIES_IFACE))
97
98
#XXX This break good super behaviour!
99
# super(MandosClientPropertyCache, self).__init__(
100
# *args, **kwargs)
106
101
107
102
def property_changed(self, property=None, value=None):
108
103
"""This is called whenever we get a PropertyChanged signal
110
105
"""
111
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# Update properties dict with new value
112
107
self.properties[property] = value
113
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def delete(self):
115
self.property_changed_match.remove()
116
108
117
109
118
110
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
120
112
"""
121
113
122
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def __init__(self, server_proxy_object=None, update_hook=None,
123
delete_hook=None, logger=None, **kwargs):
115
delete_hook=None, logger=None, *args, **kwargs):
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116
# Called on update
125
117
self.update_hook = update_hook
126
118
# Called on delete
131
123
self.logger = logger
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124
133
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self._update_timer_callback_tag = None
126
self._update_timer_callback_lock = 0
127
self.last_checker_failed = False
134
128
135
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# The widget shown normally
136
130
self._text_widget = urwid.Text("")
137
131
# The widget shown when we have focus
138
132
self._focus_text_widget = urwid.Text("")
139
super(MandosClientWidget, self).__init__(**kwargs)
133
super(MandosClientWidget, self).__init__(
134
update_hook=update_hook, delete_hook=delete_hook,
135
*args, **kwargs)
140
136
self.update()
141
137
self.opened = False
142
138
143
self.match_objects = (
144
self.proxy.connect_to_signal("CheckerCompleted",
145
self.checker_completed,
146
client_interface,
147
byte_arrays=True),
148
self.proxy.connect_to_signal("CheckerStarted",
149
self.checker_started,
150
client_interface,
151
byte_arrays=True),
152
self.proxy.connect_to_signal("GotSecret",
153
self.got_secret,
154
client_interface,
155
byte_arrays=True),
156
self.proxy.connect_to_signal("NeedApproval",
157
self.need_approval,
158
client_interface,
159
byte_arrays=True),
160
self.proxy.connect_to_signal("Rejected",
161
self.rejected,
162
client_interface,
163
byte_arrays=True))
164
#self.logger('Created client {0}'
165
# .format(self.properties["Name"]))
139
last_checked_ok = isoformat_to_datetime(self.properties
140
["LastCheckedOK"])
141
if last_checked_ok is None:
142
self.last_checker_failed = True
143
else:
144
self.last_checker_failed = ((datetime.datetime.utcnow()
145
- last_checked_ok)
146
> datetime.timedelta
147
(milliseconds=
148
self.properties
149
["Interval"]))
150
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if self.last_checker_failed:
152
self.using_timer(True)
153
154
if self.need_approval:
155
self.using_timer(True)
156
157
self.proxy.connect_to_signal("CheckerCompleted",
158
self.checker_completed,
159
client_interface,
160
byte_arrays=True)
161
self.proxy.connect_to_signal("CheckerStarted",
162
self.checker_started,
163
client_interface,
164
byte_arrays=True)
165
self.proxy.connect_to_signal("GotSecret",
166
self.got_secret,
167
client_interface,
168
byte_arrays=True)
169
self.proxy.connect_to_signal("NeedApproval",
170
self.need_approval,
171
client_interface,
172
byte_arrays=True)
173
self.proxy.connect_to_signal("Rejected",
174
self.rejected,
175
client_interface,
176
byte_arrays=True)
166
177
178
def property_changed(self, property=None, value=None):
179
super(self, MandosClientWidget).property_changed(property,
180
value)
181
if property == "ApprovalPending":
182
using_timer(bool(value))
183
167
184
def using_timer(self, flag):
168
185
"""Call this method with True or False when timer should be
169
186
activated or deactivated.
170
187
"""
171
if flag and self._update_timer_callback_tag is None:
172
# Will update the shown timer value every second
188
old = self._update_timer_callback_lock
189
if flag:
190
self._update_timer_callback_lock += 1
191
else:
192
self._update_timer_callback_lock -= 1
193
if old == 0 and self._update_timer_callback_lock:
173
194
self._update_timer_callback_tag = (gobject.timeout_add
174
195
(1000,
175
196
self.update_timer))
176
elif not (flag or self._update_timer_callback_tag is None):
197
elif old and self._update_timer_callback_lock == 0:
177
198
gobject.source_remove(self._update_timer_callback_tag)
178
199
self._update_timer_callback_tag = None
179
200
180
201
def checker_completed(self, exitstatus, condition, command):
181
202
if exitstatus == 0:
203
if self.last_checker_failed:
204
self.last_checker_failed = False
205
self.using_timer(False)
206
#self.logger('Checker for client %s (command "%s")'
207
# ' was successful'
208
# % (self.properties["Name"], command))
182
209
self.update()
183
210
return
184
211
# Checker failed
212
if not self.last_checker_failed:
213
self.last_checker_failed = True
214
self.using_timer(True)
185
215
if os.WIFEXITED(condition):
186
self.logger('Checker for client {0} (command "{1}")'
187
' failed with exit code {2}'
188
.format(self.properties["Name"], command,
189
os.WEXITSTATUS(condition)))
216
self.logger('Checker for client %s (command "%s")'
217
' failed with exit code %s'
218
% (self.properties["Name"], command,
219
os.WEXITSTATUS(condition)))
190
220
elif os.WIFSIGNALED(condition):
191
self.logger('Checker for client {0} (command "{1}") was'
192
' killed by signal {2}'
193
.format(self.properties["Name"], command,
194
os.WTERMSIG(condition)))
221
self.logger('Checker for client %s (command "%s")'
222
' was killed by signal %s'
223
% (self.properties["Name"], command,
224
os.WTERMSIG(condition)))
195
225
elif os.WCOREDUMP(condition):
196
self.logger('Checker for client {0} (command "{1}")'
226
self.logger('Checker for client %s (command "%s")'
197
227
' dumped core'
198
.format(self.properties["Name"], command))
228
% (self.properties["Name"], command))
199
229
else:
200
self.logger('Checker for client {0} completed'
201
' mysteriously'
202
.format(self.properties["Name"]))
230
self.logger('Checker for client %s completed'
231
' mysteriously')
203
232
self.update()
204
233
205
234
def checker_started(self, command):
206
"""Server signals that a checker started. This could be useful
207
to log in the future. """
208
#self.logger('Client {0} started checker "{1}"'
209
# .format(self.properties["Name"],
210
# str(command)))
235
#self.logger('Client %s started checker "%s"'
236
# % (self.properties["Name"], unicode(command)))
211
237
pass
212
238
213
239
def got_secret(self):
214
self.logger('Client {0} received its secret'
215
.format(self.properties["Name"]))
240
self.last_checker_failed = False
241
self.logger('Client %s received its secret'
242
% self.properties["Name"])
216
243
217
244
def need_approval(self, timeout, default):
218
245
if not default:
219
message = 'Client {0} needs approval within {1} seconds'
246
message = 'Client %s needs approval within %s seconds'
220
247
else:
221
message = 'Client {0} will get its secret in {1} seconds'
222
self.logger(message.format(self.properties["Name"],
223
timeout/1000))
248
message = 'Client %s will get its secret in %s seconds'
249
self.logger(message
250
% (self.properties["Name"], timeout/1000))
251
self.using_timer(True)
224
252
225
253
def rejected(self, reason):
226
self.logger('Client {0} was rejected; reason: {1}'
227
.format(self.properties["Name"], reason))
254
self.logger('Client %s was rejected; reason: %s'
255
% (self.properties["Name"], reason))
228
256
229
257
def selectable(self):
230
258
"""Make this a "selectable" widget.
252
280
"bold-underline-blink":
253
281
"bold-underline-blink-standout",
254
282
}
255
283
256
284
# Rebuild focus and non-focus widgets using current properties
257
285
258
286
# Base part of a client. Name!
259
base = '{name}: '.format(name=self.properties["Name"])
287
base = ('%(name)s: '
288
% {"name": self.properties["Name"]})
260
289
if not self.properties["Enabled"]:
261
290
message = "DISABLED"
262
self.using_timer(False)
263
291
elif self.properties["ApprovalPending"]:
264
292
timeout = datetime.timedelta(milliseconds
265
293
= self.properties
267
295
last_approval_request = isoformat_to_datetime(
268
296
self.properties["LastApprovalRequest"])
269
297
if last_approval_request is not None:
270
timer = max(timeout - (datetime.datetime.utcnow()
271
- last_approval_request),
272
datetime.timedelta())
298
timer = timeout - (datetime.datetime.utcnow()
299
- last_approval_request)
273
300
else:
274
301
timer = datetime.timedelta()
275
302
if self.properties["ApprovedByDefault"]:
276
message = "Approval in {0}. (d)eny?"
277
else:
278
message = "Denial in {0}. (a)pprove?"
279
message = message.format(str(timer).rsplit(".", 1)[0])
280
self.using_timer(True)
281
elif self.properties["LastCheckerStatus"] != 0:
282
# When checker has failed, show timer until client expires
283
expires = self.properties["Expires"]
284
if expires == "":
285
timer = datetime.timedelta(0)
286
else:
287
expires = (datetime.datetime.strptime
288
(expires, '%Y-%m-%dT%H:%M:%S.%f'))
289
timer = max(expires - datetime.datetime.utcnow(),
290
datetime.timedelta())
303
message = "Approval in %s. (d)eny?"
304
else:
305
message = "Denial in %s. (a)pprove?"
306
message = message % unicode(timer).rsplit(".", 1)[0]
307
elif self.last_checker_failed:
308
timeout = datetime.timedelta(milliseconds
309
= self.properties
310
["Timeout"])
311
last_ok = isoformat_to_datetime(
312
max((self.properties["LastCheckedOK"]
313
or self.properties["Created"]),
314
self.properties["LastEnabled"]))
315
timer = timeout - (datetime.datetime.utcnow() - last_ok)
291
316
message = ('A checker has failed! Time until client'
292
' gets disabled: {0}'
293
.format(str(timer).rsplit(".", 1)[0]))
294
self.using_timer(True)
317
' gets disabled: %s'
318
% unicode(timer).rsplit(".", 1)[0])
295
319
else:
296
320
message = "enabled"
297
self.using_timer(False)
298
self._text = "{0}{1}".format(base, message)
299
321
self._text = "%s%s" % (base, message)
322
300
323
if not urwid.supports_unicode():
301
324
self._text = self._text.encode("ascii", "replace")
302
325
textlist = [("normal", self._text)]
314
337
self.update_hook()
315
338
316
339
def update_timer(self):
317
"""called by gobject. Will indefinitely loop until
318
gobject.source_remove() on tag is called"""
340
"called by gobject"
319
341
self.update()
320
342
return True # Keep calling this
321
343
322
def delete(self, **kwargs):
344
def delete(self):
323
345
if self._update_timer_callback_tag is not None:
324
346
gobject.source_remove(self._update_timer_callback_tag)
325
347
self._update_timer_callback_tag = None
326
for match in self.match_objects:
327
match.remove()
328
self.match_objects = ()
329
348
if self.delete_hook is not None:
330
349
self.delete_hook(self)
331
return super(MandosClientWidget, self).delete(**kwargs)
332
350
333
351
def render(self, maxcolrow, focus=False):
334
352
"""Render differently if we have focus.
340
358
"""Handle keys.
341
359
This overrides the method from urwid.FlowWidget"""
342
360
if key == "+":
343
self.proxy.Enable(dbus_interface = client_interface,
344
ignore_reply=True)
361
self.proxy.Enable(dbus_interface = client_interface)
345
362
elif key == "-":
346
self.proxy.Disable(dbus_interface = client_interface,
347
ignore_reply=True)
363
self.proxy.Disable(dbus_interface = client_interface)
348
364
elif key == "a":
349
365
self.proxy.Approve(dbus.Boolean(True, variant_level=1),
350
dbus_interface = client_interface,
351
ignore_reply=True)
366
dbus_interface = client_interface)
352
367
elif key == "d":
353
368
self.proxy.Approve(dbus.Boolean(False, variant_level=1),
354
dbus_interface = client_interface,
355
ignore_reply=True)
369
dbus_interface = client_interface)
356
370
elif key == "R" or key == "_" or key == "ctrl k":
357
371
self.server_proxy_object.RemoveClient(self.proxy
358
.object_path,
359
ignore_reply=True)
372
.object_path)
360
373
elif key == "s":
361
self.proxy.StartChecker(dbus_interface = client_interface,
362
ignore_reply=True)
374
self.proxy.StartChecker(dbus_interface = client_interface)
363
375
elif key == "S":
364
self.proxy.StopChecker(dbus_interface = client_interface,
365
ignore_reply=True)
376
self.proxy.StopChecker(dbus_interface = client_interface)
366
377
elif key == "C":
367
self.proxy.CheckedOK(dbus_interface = client_interface,
368
ignore_reply=True)
378
self.proxy.CheckedOK(dbus_interface = client_interface)
369
379
# xxx
370
380
# elif key == "p" or key == "=":
371
381
# self.proxy.pause()
376
386
else:
377
387
return key
378
388
379
def property_changed(self, property=None, **kwargs):
389
def property_changed(self, property=None, value=None,
390
*args, **kwargs):
380
391
"""Call self.update() if old value is not new value.
381
392
This overrides the method from MandosClientPropertyCache"""
382
property_name = str(property)
393
property_name = unicode(property)
383
394
old_value = self.properties.get(property_name)
384
395
super(MandosClientWidget, self).property_changed(
385
property=property, **kwargs)
396
property=property, value=value, *args, **kwargs)
386
397
if self.properties.get(property_name) != old_value:
387
398
self.update()
388
399
392
403
"down" key presses, thus not allowing any containing widgets to
393
404
use them as an excuse to shift focus away from this widget.
394
405
"""
395
def keypress(self, *args, **kwargs):
396
ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
406
def keypress(self, maxcolrow, key):
407
ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
397
408
if ret in ("up", "down"):
398
409
return
399
410
return ret
412
423
("normal",
413
424
"default", "default", None),
414
425
("bold",
415
"bold", "default", "bold"),
426
"default", "default", "bold"),
416
427
("underline-blink",
417
"underline,blink", "default", "underline,blink"),
428
"default", "default", "underline"),
418
429
("standout",
419
"standout", "default", "standout"),
430
"default", "default", "standout"),
420
431
("bold-underline-blink",
421
"bold,underline,blink", "default", "bold,underline,blink"),
432
"default", "default", ("bold", "underline")),
422
433
("bold-standout",
423
"bold,standout", "default", "bold,standout"),
434
"default", "default", ("bold", "standout")),
424
435
("underline-blink-standout",
425
"underline,blink,standout", "default",
426
"underline,blink,standout"),
436
"default", "default", ("underline", "standout")),
427
437
("bold-underline-blink-standout",
428
"bold,underline,blink,standout", "default",
429
"bold,underline,blink,standout"),
438
"default", "default", ("bold", "underline",
439
"standout")),
430
440
))
431
441
432
442
if urwid.supports_unicode():
464
474
465
475
self.busname = domain + '.Mandos'
466
476
self.main_loop = gobject.MainLoop()
477
self.bus = dbus.SystemBus()
478
mandos_dbus_objc = self.bus.get_object(
479
self.busname, "/", follow_name_owner_changes=True)
480
self.mandos_serv = dbus.Interface(mandos_dbus_objc,
481
dbus_interface
482
= server_interface)
483
try:
484
mandos_clients = (self.mandos_serv
485
.GetAllClientsWithProperties())
486
except dbus.exceptions.DBusException:
487
mandos_clients = dbus.Dictionary()
488
489
(self.mandos_serv
490
.connect_to_signal("ClientRemoved",
491
self.find_and_remove_client,
492
dbus_interface=server_interface,
493
byte_arrays=True))
494
(self.mandos_serv
495
.connect_to_signal("ClientAdded",
496
self.add_new_client,
497
dbus_interface=server_interface,
498
byte_arrays=True))
499
(self.mandos_serv
500
.connect_to_signal("ClientNotFound",
501
self.client_not_found,
502
dbus_interface=server_interface,
503
byte_arrays=True))
504
for path, client in mandos_clients.iteritems():
505
client_proxy_object = self.bus.get_object(self.busname,
506
path)
507
self.add_client(MandosClientWidget(server_proxy_object
508
=self.mandos_serv,
509
proxy_object
510
=client_proxy_object,
511
properties=client,
512
update_hook
513
=self.refresh,
514
delete_hook
515
=self.remove_client,
516
logger
517
=self.log_message),
518
path=path)
467
519
468
520
def client_not_found(self, fingerprint, address):
469
self.log_message("Client with address {0} and fingerprint"
470
" {1} could not be found"
471
.format(address, fingerprint))
521
self.log_message(("Client with address %s and fingerprint %s"
522
" could not be found" % (address,
523
fingerprint)))
472
524
473
525
def rebuild(self):
474
526
"""This rebuilds the User Interface.
484
536
self.divider)))
485
537
if self.log_visible:
486
538
self.uilist.append(self.logbox)
539
pass
487
540
self.topwidget = urwid.Pile(self.uilist)
488
541
489
542
def log_message(self, message):
490
"""Log message formatted with timestamp"""
491
543
timestamp = datetime.datetime.now().isoformat()
492
544
self.log_message_raw(timestamp + ": " + message)
493
545
506
558
self.log_visible = not self.log_visible
507
559
self.rebuild()
508
560
#self.log_message("Log visibility changed to: "
509
# + str(self.log_visible))
561
# + unicode(self.log_visible))
510
562
511
563
def change_log_display(self):
512
564
"""Change type of log display.
520
572
#self.log_message("Wrap mode: " + self.log_wrap)
521
573
522
574
def find_and_remove_client(self, path, name):
523
"""Find a client by its object path and remove it.
575
"""Find an client from its object path and remove it.
524
576
525
577
This is connected to the ClientRemoved signal from the
526
578
Mandos server object."""
528
580
client = self.clients_dict[path]
529
581
except KeyError:
530
582
# not found?
531
self.log_message("Unknown client {0!r} ({1!r}) removed"
532
.format(name, path))
533
583
return
534
client.delete()
584
self.remove_client(client, path)
535
585
536
586
def add_new_client(self, path):
537
587
client_proxy_object = self.bus.get_object(self.busname, path)
552
602
if path is None:
553
603
path = client.proxy.object_path
554
604
self.clients_dict[path] = client
555
self.clients.sort(key=lambda c: c.properties["Name"])
605
self.clients.sort(None, lambda c: c.properties["Name"])
556
606
self.refresh()
557
607
558
608
def remove_client(self, client, path=None):
560
610
if path is None:
561
611
path = client.proxy.object_path
562
612
del self.clients_dict[path]
613
if not self.clients_dict:
614
# Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
615
# is completely emptied, we need to recreate it.
616
self.clients = urwid.SimpleListWalker([])
617
self.rebuild()
563
618
self.refresh()
564
619
565
620
def refresh(self):
569
624
570
625
def run(self):
571
626
"""Start the main loop and exit when it's done."""
572
self.bus = dbus.SystemBus()
573
mandos_dbus_objc = self.bus.get_object(
574
self.busname, "/", follow_name_owner_changes=True)
575
self.mandos_serv = dbus.Interface(mandos_dbus_objc,
576
dbus_interface
577
= server_interface)
578
try:
579
mandos_clients = (self.mandos_serv
580
.GetAllClientsWithProperties())
581
if not mandos_clients:
582
self.log_message_raw(("bold", "Note: Server has no clients."))
583
except dbus.exceptions.DBusException:
584
self.log_message_raw(("bold", "Note: No Mandos server running."))
585
mandos_clients = dbus.Dictionary()
586
587
(self.mandos_serv
588
.connect_to_signal("ClientRemoved",
589
self.find_and_remove_client,
590
dbus_interface=server_interface,
591
byte_arrays=True))
592
(self.mandos_serv
593
.connect_to_signal("ClientAdded",
594
self.add_new_client,
595
dbus_interface=server_interface,
596
byte_arrays=True))
597
(self.mandos_serv
598
.connect_to_signal("ClientNotFound",
599
self.client_not_found,
600
dbus_interface=server_interface,
601
byte_arrays=True))
602
for path, client in mandos_clients.items():
603
client_proxy_object = self.bus.get_object(self.busname,
604
path)
605
self.add_client(MandosClientWidget(server_proxy_object
606
=self.mandos_serv,
607
proxy_object
608
=client_proxy_object,
609
properties=client,
610
update_hook
611
=self.refresh,
612
delete_hook
613
=self.remove_client,
614
logger
615
=self.log_message),
616
path=path)
617
618
627
self.refresh()
619
628
self._input_callback_tag = (gobject.io_add_watch
620
629
(sys.stdin.fileno(),
717
726
ui.run()
718
727
except KeyboardInterrupt:
719
728
ui.screen.stop()
720
except Exception as e:
721
ui.log_message(str(e))
729
except Exception, e:
730
ui.log_message(unicode(e))
722
731
ui.screen.stop()
723
732
raise
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0