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* mandos: Never call .Reset() on a defunct Avahi entry group.
  (AvahiService.remove): Only do group.Reset(), as before.
  (AvahiService.add): Only create new group if necessary.
  (AvahiService.cleanup): Also do group.Free() if a group exists.
  (AvahiService.server_state_changed): Call .cleanup() on errors.
                                       Also log error parameter, if
                                       passed.

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mandos-monitor
 
1
#!/usr/bin/python
 
2
# -*- mode: python; coding: utf-8 -*-
 
3
# 
 
4
# Mandos Monitor - Control and monitor the Mandos server
 
5
# 
 
6
# Copyright © 2009-2011 Teddy Hogeborn
 
7
# Copyright © 2009-2011 Björn Påhlsson
 
8
# 
 
9
# This program is free software: you can redistribute it and/or modify
 
10
# it under the terms of the GNU General Public License as published by
 
11
# the Free Software Foundation, either version 3 of the License, or
 
12
# (at your option) any later version.
 
13
#
 
14
#     This program is distributed in the hope that it will be useful,
 
15
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
16
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
17
#     GNU General Public License for more details.
 
18
# 
 
19
# You should have received a copy of the GNU General Public License
 
20
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
21
# 
 
22
# Contact the authors at <mandos@fukt.bsnet.se>.
 
23
# 
 
24
 
 
25
from __future__ import division, absolute_import, print_function, unicode_literals
 
26
 
 
27
import sys
 
28
import os
 
29
import signal
 
30
 
 
31
import datetime
 
32
 
 
33
import urwid.curses_display
 
34
import urwid
 
35
 
 
36
from dbus.mainloop.glib import DBusGMainLoop
 
37
import gobject
 
38
 
 
39
import dbus
 
40
 
 
41
import UserList
 
42
 
 
43
import locale
 
44
 
 
45
locale.setlocale(locale.LC_ALL, '')
 
46
 
 
47
import logging
 
48
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
49
 
 
50
# Some useful constants
 
51
domain = 'se.bsnet.fukt'
 
52
server_interface = domain + '.Mandos'
 
53
client_interface = domain + '.Mandos.Client'
 
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.
 
61
urwid.curses_display.curses.A_UNDERLINE |= (
 
62
    urwid.curses_display.curses.A_BLINK)
 
63
 
 
64
def isoformat_to_datetime(iso):
 
65
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
66
    if not iso:
 
67
        return None
 
68
    d, t = iso.split("T", 1)
 
69
    year, month, day = d.split("-", 2)
 
70
    hour, minute, second = t.split(":", 2)
 
71
    second, fraction = divmod(float(second), 1)
 
72
    return datetime.datetime(int(year),
 
73
                             int(month),
 
74
                             int(day),
 
75
                             int(hour),
 
76
                             int(minute),
 
77
                             int(second),           # Whole seconds
 
78
                             int(fraction*1000000)) # Microseconds
 
79
 
 
80
class MandosClientPropertyCache(object):
 
81
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
82
    properties and calls a hook function when any of them are
 
83
    changed.
 
84
    """
 
85
    def __init__(self, proxy_object=None, *args, **kwargs):
 
86
        self.proxy = proxy_object # Mandos Client proxy object
 
87
        
 
88
        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)
 
101
    
 
102
    def property_changed(self, property=None, value=None):
 
103
        """This is called whenever we get a PropertyChanged signal
 
104
        It updates the changed property in the "properties" dict.
 
105
        """
 
106
        # Update properties dict with new value
 
107
        self.properties[property] = value
 
108
 
 
109
 
 
110
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
111
    """A Mandos Client which is visible on the screen.
 
112
    """
 
113
    
 
114
    def __init__(self, server_proxy_object=None, update_hook=None,
 
115
                 delete_hook=None, logger=None, *args, **kwargs):
 
116
        # Called on update
 
117
        self.update_hook = update_hook
 
118
        # Called on delete
 
119
        self.delete_hook = delete_hook
 
120
        # Mandos Server proxy object
 
121
        self.server_proxy_object = server_proxy_object
 
122
        # Logger
 
123
        self.logger = logger
 
124
        
 
125
        self._update_timer_callback_tag = None
 
126
        self._update_timer_callback_lock = 0
 
127
        self.last_checker_failed = False
 
128
        
 
129
        # The widget shown normally
 
130
        self._text_widget = urwid.Text("")
 
131
        # The widget shown when we have focus
 
132
        self._focus_text_widget = urwid.Text("")
 
133
        super(MandosClientWidget, self).__init__(
 
134
            update_hook=update_hook, delete_hook=delete_hook,
 
135
            *args, **kwargs)
 
136
        self.update()
 
137
        self.opened = False
 
138
        
 
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
        
 
151
        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)
 
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
        
 
184
    def using_timer(self, flag):
 
185
        """Call this method with True or False when timer should be
 
186
        activated or deactivated.
 
187
        """
 
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:
 
194
            self._update_timer_callback_tag = (gobject.timeout_add
 
195
                                               (1000,
 
196
                                                self.update_timer))
 
197
        elif old and self._update_timer_callback_lock == 0:
 
198
            gobject.source_remove(self._update_timer_callback_tag)
 
199
            self._update_timer_callback_tag = None
 
200
    
 
201
    def checker_completed(self, exitstatus, condition, command):
 
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))
 
209
            self.update()
 
210
            return
 
211
        # Checker failed
 
212
        if not self.last_checker_failed:
 
213
            self.last_checker_failed = True
 
214
            self.using_timer(True)
 
215
        if os.WIFEXITED(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)))
 
220
        elif os.WIFSIGNALED(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)))
 
225
        elif os.WCOREDUMP(condition):
 
226
            self.logger('Checker for client %s (command "%s")'
 
227
                        ' dumped core'
 
228
                        % (self.properties["Name"], command))
 
229
        else:
 
230
            self.logger('Checker for client %s completed'
 
231
                        ' mysteriously')
 
232
        self.update()
 
233
    
 
234
    def checker_started(self, command):
 
235
        #self.logger('Client %s started checker "%s"'
 
236
        #            % (self.properties["Name"], unicode(command)))
 
237
        pass
 
238
    
 
239
    def got_secret(self):
 
240
        self.last_checker_failed = False
 
241
        self.logger('Client %s received its secret'
 
242
                    % self.properties["Name"])
 
243
    
 
244
    def need_approval(self, timeout, default):
 
245
        if not default:
 
246
            message = 'Client %s needs approval within %s seconds'
 
247
        else:
 
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)
 
252
    
 
253
    def rejected(self, reason):
 
254
        self.logger('Client %s was rejected; reason: %s'
 
255
                    % (self.properties["Name"], reason))
 
256
    
 
257
    def selectable(self):
 
258
        """Make this a "selectable" widget.
 
259
        This overrides the method from urwid.FlowWidget."""
 
260
        return True
 
261
    
 
262
    def rows(self, maxcolrow, focus=False):
 
263
        """How many rows this widget will occupy might depend on
 
264
        whether we have focus or not.
 
265
        This overrides the method from urwid.FlowWidget"""
 
266
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
267
    
 
268
    def current_widget(self, focus=False):
 
269
        if focus or self.opened:
 
270
            return self._focus_widget
 
271
        return self._widget
 
272
    
 
273
    def update(self):
 
274
        "Called when what is visible on the screen should be updated."
 
275
        # How to add standout mode to a style
 
276
        with_standout = { "normal": "standout",
 
277
                          "bold": "bold-standout",
 
278
                          "underline-blink":
 
279
                              "underline-blink-standout",
 
280
                          "bold-underline-blink":
 
281
                              "bold-underline-blink-standout",
 
282
                          }
 
283
 
 
284
        # Rebuild focus and non-focus widgets using current properties
 
285
 
 
286
        # Base part of a client. Name!
 
287
        base = ('%(name)s: '
 
288
                      % {"name": self.properties["Name"]})
 
289
        if not self.properties["Enabled"]:
 
290
            message = "DISABLED"
 
291
        elif self.properties["ApprovalPending"]:
 
292
            timeout = datetime.timedelta(milliseconds
 
293
                                         = self.properties
 
294
                                         ["ApprovalDelay"])
 
295
            last_approval_request = isoformat_to_datetime(
 
296
                self.properties["LastApprovalRequest"])
 
297
            if last_approval_request is not None:
 
298
                timer = timeout - (datetime.datetime.utcnow()
 
299
                                   - last_approval_request)
 
300
            else:
 
301
                timer = datetime.timedelta()
 
302
            if self.properties["ApprovedByDefault"]:
 
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)
 
316
            message = ('A checker has failed! Time until client'
 
317
                       ' gets disabled: %s'
 
318
                           % unicode(timer).rsplit(".", 1)[0])
 
319
        else:
 
320
            message = "enabled"
 
321
        self._text = "%s%s" % (base, message)
 
322
            
 
323
        if not urwid.supports_unicode():
 
324
            self._text = self._text.encode("ascii", "replace")
 
325
        textlist = [("normal", self._text)]
 
326
        self._text_widget.set_text(textlist)
 
327
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
328
                                           text[1])
 
329
                                          if isinstance(text, tuple)
 
330
                                          else text
 
331
                                          for text in textlist])
 
332
        self._widget = self._text_widget
 
333
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
334
                                            "standout")
 
335
        # Run update hook, if any
 
336
        if self.update_hook is not None:
 
337
            self.update_hook()
 
338
    
 
339
    def update_timer(self):
 
340
        "called by gobject"
 
341
        self.update()
 
342
        return True             # Keep calling this
 
343
    
 
344
    def delete(self):
 
345
        if self._update_timer_callback_tag is not None:
 
346
            gobject.source_remove(self._update_timer_callback_tag)
 
347
            self._update_timer_callback_tag = None
 
348
        if self.delete_hook is not None:
 
349
            self.delete_hook(self)
 
350
    
 
351
    def render(self, maxcolrow, focus=False):
 
352
        """Render differently if we have focus.
 
353
        This overrides the method from urwid.FlowWidget"""
 
354
        return self.current_widget(focus).render(maxcolrow,
 
355
                                                 focus=focus)
 
356
    
 
357
    def keypress(self, maxcolrow, key):
 
358
        """Handle keys.
 
359
        This overrides the method from urwid.FlowWidget"""
 
360
        if key == "+":
 
361
            self.proxy.Enable(dbus_interface = client_interface,
 
362
                              ignore_reply=True)
 
363
        elif key == "-":
 
364
            self.proxy.Disable(dbus_interface = client_interface,
 
365
                               ignore_reply=True)
 
366
        elif key == "a":
 
367
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
368
                               dbus_interface = client_interface,
 
369
                               ignore_reply=True)
 
370
        elif key == "d":
 
371
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
372
                                  dbus_interface = client_interface,
 
373
                               ignore_reply=True)
 
374
        elif key == "R" or key == "_" or key == "ctrl k":
 
375
            self.server_proxy_object.RemoveClient(self.proxy
 
376
                                                  .object_path,
 
377
                                                  ignore_reply=True)
 
378
        elif key == "s":
 
379
            self.proxy.StartChecker(dbus_interface = client_interface,
 
380
                                    ignore_reply=True)
 
381
        elif key == "S":
 
382
            self.proxy.StopChecker(dbus_interface = client_interface,
 
383
                                   ignore_reply=True)
 
384
        elif key == "C":
 
385
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
386
                                 ignore_reply=True)
 
387
        # xxx
 
388
#         elif key == "p" or key == "=":
 
389
#             self.proxy.pause()
 
390
#         elif key == "u" or key == ":":
 
391
#             self.proxy.unpause()
 
392
#         elif key == "RET":
 
393
#             self.open()
 
394
        else:
 
395
            return key
 
396
    
 
397
    def property_changed(self, property=None, value=None,
 
398
                         *args, **kwargs):
 
399
        """Call self.update() if old value is not new value.
 
400
        This overrides the method from MandosClientPropertyCache"""
 
401
        property_name = unicode(property)
 
402
        old_value = self.properties.get(property_name)
 
403
        super(MandosClientWidget, self).property_changed(
 
404
            property=property, value=value, *args, **kwargs)
 
405
        if self.properties.get(property_name) != old_value:
 
406
            self.update()
 
407
 
 
408
 
 
409
class ConstrainedListBox(urwid.ListBox):
 
410
    """Like a normal urwid.ListBox, but will consume all "up" or
 
411
    "down" key presses, thus not allowing any containing widgets to
 
412
    use them as an excuse to shift focus away from this widget.
 
413
    """
 
414
    def keypress(self, maxcolrow, key):
 
415
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
 
416
        if ret in ("up", "down"):
 
417
            return
 
418
        return ret
 
419
 
 
420
 
 
421
class UserInterface(object):
 
422
    """This is the entire user interface - the whole screen
 
423
    with boxes, lists of client widgets, etc.
 
424
    """
 
425
    def __init__(self, max_log_length=1000):
 
426
        DBusGMainLoop(set_as_default=True)
 
427
        
 
428
        self.screen = urwid.curses_display.Screen()
 
429
        
 
430
        self.screen.register_palette((
 
431
                ("normal",
 
432
                 "default", "default", None),
 
433
                ("bold",
 
434
                 "default", "default", "bold"),
 
435
                ("underline-blink",
 
436
                 "default", "default", "underline"),
 
437
                ("standout",
 
438
                 "default", "default", "standout"),
 
439
                ("bold-underline-blink",
 
440
                 "default", "default", ("bold", "underline")),
 
441
                ("bold-standout",
 
442
                 "default", "default", ("bold", "standout")),
 
443
                ("underline-blink-standout",
 
444
                 "default", "default", ("underline", "standout")),
 
445
                ("bold-underline-blink-standout",
 
446
                 "default", "default", ("bold", "underline",
 
447
                                          "standout")),
 
448
                ))
 
449
        
 
450
        if urwid.supports_unicode():
 
451
            self.divider = "─" # \u2500
 
452
            #self.divider = "━" # \u2501
 
453
        else:
 
454
            #self.divider = "-" # \u002d
 
455
            self.divider = "_" # \u005f
 
456
        
 
457
        self.screen.start()
 
458
        
 
459
        self.size = self.screen.get_cols_rows()
 
460
        
 
461
        self.clients = urwid.SimpleListWalker([])
 
462
        self.clients_dict = {}
 
463
        
 
464
        # We will add Text widgets to this list
 
465
        self.log = []
 
466
        self.max_log_length = max_log_length
 
467
        
 
468
        # We keep a reference to the log widget so we can remove it
 
469
        # from the ListWalker without it getting destroyed
 
470
        self.logbox = ConstrainedListBox(self.log)
 
471
        
 
472
        # This keeps track of whether self.uilist currently has
 
473
        # self.logbox in it or not
 
474
        self.log_visible = True
 
475
        self.log_wrap = "any"
 
476
        
 
477
        self.rebuild()
 
478
        self.log_message_raw(("bold",
 
479
                              "Mandos Monitor version " + version))
 
480
        self.log_message_raw(("bold",
 
481
                              "q: Quit  ?: Help"))
 
482
        
 
483
        self.busname = domain + '.Mandos'
 
484
        self.main_loop = gobject.MainLoop()
 
485
        self.bus = dbus.SystemBus()
 
486
        mandos_dbus_objc = self.bus.get_object(
 
487
            self.busname, "/", follow_name_owner_changes=True)
 
488
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
489
                                          dbus_interface
 
490
                                          = server_interface)
 
491
        try:
 
492
            mandos_clients = (self.mandos_serv
 
493
                              .GetAllClientsWithProperties())
 
494
        except dbus.exceptions.DBusException:
 
495
            mandos_clients = dbus.Dictionary()
 
496
        
 
497
        (self.mandos_serv
 
498
         .connect_to_signal("ClientRemoved",
 
499
                            self.find_and_remove_client,
 
500
                            dbus_interface=server_interface,
 
501
                            byte_arrays=True))
 
502
        (self.mandos_serv
 
503
         .connect_to_signal("ClientAdded",
 
504
                            self.add_new_client,
 
505
                            dbus_interface=server_interface,
 
506
                            byte_arrays=True))
 
507
        (self.mandos_serv
 
508
         .connect_to_signal("ClientNotFound",
 
509
                            self.client_not_found,
 
510
                            dbus_interface=server_interface,
 
511
                            byte_arrays=True))
 
512
        for path, client in mandos_clients.iteritems():
 
513
            client_proxy_object = self.bus.get_object(self.busname,
 
514
                                                      path)
 
515
            self.add_client(MandosClientWidget(server_proxy_object
 
516
                                               =self.mandos_serv,
 
517
                                               proxy_object
 
518
                                               =client_proxy_object,
 
519
                                               properties=client,
 
520
                                               update_hook
 
521
                                               =self.refresh,
 
522
                                               delete_hook
 
523
                                               =self.remove_client,
 
524
                                               logger
 
525
                                               =self.log_message),
 
526
                            path=path)
 
527
    
 
528
    def client_not_found(self, fingerprint, address):
 
529
        self.log_message(("Client with address %s and fingerprint %s"
 
530
                          " could not be found" % (address,
 
531
                                                    fingerprint)))
 
532
    
 
533
    def rebuild(self):
 
534
        """This rebuilds the User Interface.
 
535
        Call this when the widget layout needs to change"""
 
536
        self.uilist = []
 
537
        #self.uilist.append(urwid.ListBox(self.clients))
 
538
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
539
                                                          clients),
 
540
                                       #header=urwid.Divider(),
 
541
                                       header=None,
 
542
                                       footer=
 
543
                                       urwid.Divider(div_char=
 
544
                                                     self.divider)))
 
545
        if self.log_visible:
 
546
            self.uilist.append(self.logbox)
 
547
            pass
 
548
        self.topwidget = urwid.Pile(self.uilist)
 
549
    
 
550
    def log_message(self, message):
 
551
        timestamp = datetime.datetime.now().isoformat()
 
552
        self.log_message_raw(timestamp + ": " + message)
 
553
    
 
554
    def log_message_raw(self, markup):
 
555
        """Add a log message to the log buffer."""
 
556
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
557
        if (self.max_log_length
 
558
            and len(self.log) > self.max_log_length):
 
559
            del self.log[0:len(self.log)-self.max_log_length-1]
 
560
        self.logbox.set_focus(len(self.logbox.body.contents),
 
561
                              coming_from="above")
 
562
        self.refresh()
 
563
    
 
564
    def toggle_log_display(self):
 
565
        """Toggle visibility of the log buffer."""
 
566
        self.log_visible = not self.log_visible
 
567
        self.rebuild()
 
568
        #self.log_message("Log visibility changed to: "
 
569
        #                 + unicode(self.log_visible))
 
570
    
 
571
    def change_log_display(self):
 
572
        """Change type of log display.
 
573
        Currently, this toggles wrapping of text lines."""
 
574
        if self.log_wrap == "clip":
 
575
            self.log_wrap = "any"
 
576
        else:
 
577
            self.log_wrap = "clip"
 
578
        for textwidget in self.log:
 
579
            textwidget.set_wrap_mode(self.log_wrap)
 
580
        #self.log_message("Wrap mode: " + self.log_wrap)
 
581
    
 
582
    def find_and_remove_client(self, path, name):
 
583
        """Find an client from its object path and remove it.
 
584
        
 
585
        This is connected to the ClientRemoved signal from the
 
586
        Mandos server object."""
 
587
        try:
 
588
            client = self.clients_dict[path]
 
589
        except KeyError:
 
590
            # not found?
 
591
            return
 
592
        self.remove_client(client, path)
 
593
    
 
594
    def add_new_client(self, path):
 
595
        client_proxy_object = self.bus.get_object(self.busname, path)
 
596
        self.add_client(MandosClientWidget(server_proxy_object
 
597
                                           =self.mandos_serv,
 
598
                                           proxy_object
 
599
                                           =client_proxy_object,
 
600
                                           update_hook
 
601
                                           =self.refresh,
 
602
                                           delete_hook
 
603
                                           =self.remove_client,
 
604
                                           logger
 
605
                                           =self.log_message),
 
606
                        path=path)
 
607
    
 
608
    def add_client(self, client, path=None):
 
609
        self.clients.append(client)
 
610
        if path is None:
 
611
            path = client.proxy.object_path
 
612
        self.clients_dict[path] = client
 
613
        self.clients.sort(None, lambda c: c.properties["Name"])
 
614
        self.refresh()
 
615
    
 
616
    def remove_client(self, client, path=None):
 
617
        self.clients.remove(client)
 
618
        if path is None:
 
619
            path = client.proxy.object_path
 
620
        del self.clients_dict[path]
 
621
        if not self.clients_dict:
 
622
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
 
623
            # is completely emptied, we need to recreate it.
 
624
            self.clients = urwid.SimpleListWalker([])
 
625
            self.rebuild()
 
626
        self.refresh()
 
627
    
 
628
    def refresh(self):
 
629
        """Redraw the screen"""
 
630
        canvas = self.topwidget.render(self.size, focus=True)
 
631
        self.screen.draw_screen(self.size, canvas)
 
632
    
 
633
    def run(self):
 
634
        """Start the main loop and exit when it's done."""
 
635
        self.refresh()
 
636
        self._input_callback_tag = (gobject.io_add_watch
 
637
                                    (sys.stdin.fileno(),
 
638
                                     gobject.IO_IN,
 
639
                                     self.process_input))
 
640
        self.main_loop.run()
 
641
        # Main loop has finished, we should close everything now
 
642
        gobject.source_remove(self._input_callback_tag)
 
643
        self.screen.stop()
 
644
    
 
645
    def stop(self):
 
646
        self.main_loop.quit()
 
647
    
 
648
    def process_input(self, source, condition):
 
649
        keys = self.screen.get_input()
 
650
        translations = { "ctrl n": "down",      # Emacs
 
651
                         "ctrl p": "up",        # Emacs
 
652
                         "ctrl v": "page down", # Emacs
 
653
                         "meta v": "page up",   # Emacs
 
654
                         " ": "page down",      # less
 
655
                         "f": "page down",      # less
 
656
                         "b": "page up",        # less
 
657
                         "j": "down",           # vi
 
658
                         "k": "up",             # vi
 
659
                         }
 
660
        for key in keys:
 
661
            try:
 
662
                key = translations[key]
 
663
            except KeyError:    # :-)
 
664
                pass
 
665
            
 
666
            if key == "q" or key == "Q":
 
667
                self.stop()
 
668
                break
 
669
            elif key == "window resize":
 
670
                self.size = self.screen.get_cols_rows()
 
671
                self.refresh()
 
672
            elif key == "\f":  # Ctrl-L
 
673
                self.refresh()
 
674
            elif key == "l" or key == "D":
 
675
                self.toggle_log_display()
 
676
                self.refresh()
 
677
            elif key == "w" or key == "i":
 
678
                self.change_log_display()
 
679
                self.refresh()
 
680
            elif key == "?" or key == "f1" or key == "esc":
 
681
                if not self.log_visible:
 
682
                    self.log_visible = True
 
683
                    self.rebuild()
 
684
                self.log_message_raw(("bold",
 
685
                                      "  ".
 
686
                                      join(("q: Quit",
 
687
                                            "?: Help",
 
688
                                            "l: Log window toggle",
 
689
                                            "TAB: Switch window",
 
690
                                            "w: Wrap (log)"))))
 
691
                self.log_message_raw(("bold",
 
692
                                      "  "
 
693
                                      .join(("Clients:",
 
694
                                             "+: Enable",
 
695
                                             "-: Disable",
 
696
                                             "R: Remove",
 
697
                                             "s: Start new checker",
 
698
                                             "S: Stop checker",
 
699
                                             "C: Checker OK",
 
700
                                             "a: Approve",
 
701
                                             "d: Deny"))))
 
702
                self.refresh()
 
703
            elif key == "tab":
 
704
                if self.topwidget.get_focus() is self.logbox:
 
705
                    self.topwidget.set_focus(0)
 
706
                else:
 
707
                    self.topwidget.set_focus(self.logbox)
 
708
                self.refresh()
 
709
            #elif (key == "end" or key == "meta >" or key == "G"
 
710
            #      or key == ">"):
 
711
            #    pass            # xxx end-of-buffer
 
712
            #elif (key == "home" or key == "meta <" or key == "g"
 
713
            #      or key == "<"):
 
714
            #    pass            # xxx beginning-of-buffer
 
715
            #elif key == "ctrl e" or key == "$":
 
716
            #    pass            # xxx move-end-of-line
 
717
            #elif key == "ctrl a" or key == "^":
 
718
            #    pass            # xxx move-beginning-of-line
 
719
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
720
            #    pass            # xxx left
 
721
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
722
            #    pass            # xxx right
 
723
            #elif key == "a":
 
724
            #    pass            # scroll up log
 
725
            #elif key == "z":
 
726
            #    pass            # scroll down log
 
727
            elif self.topwidget.selectable():
 
728
                self.topwidget.keypress(self.size, key)
 
729
                self.refresh()
 
730
        return True
 
731
 
 
732
ui = UserInterface()
 
733
try:
 
734
    ui.run()
 
735
except KeyboardInterrupt:
 
736
    ui.screen.stop()
 
737
except Exception, e:
 
738
    ui.log_message(unicode(e))
 
739
    ui.screen.stop()
 
740
    raise