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  • Committer: Björn Påhlsson
  • Date: 2007-10-20 21:38:25 UTC
  • Revision ID: belorn@tower-20071020213825-abf6f0d1c33ee961
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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,
26
 
                        unicode_literals)
27
 
 
28
 
import sys
29
 
import os
30
 
import signal
31
 
 
32
 
import datetime
33
 
 
34
 
import urwid.curses_display
35
 
import urwid
36
 
 
37
 
from dbus.mainloop.glib import DBusGMainLoop
38
 
import gobject
39
 
 
40
 
import dbus
41
 
 
42
 
import UserList
43
 
 
44
 
import locale
45
 
 
46
 
locale.setlocale(locale.LC_ALL, '')
47
 
 
48
 
import logging
49
 
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
50
 
 
51
 
# Some useful constants
52
 
domain = 'se.bsnet.fukt'
53
 
server_interface = domain + '.Mandos'
54
 
client_interface = domain + '.Mandos.Client'
55
 
version = "1.3.1"
56
 
 
57
 
# Always run in monochrome mode
58
 
urwid.curses_display.curses.has_colors = lambda : False
59
 
 
60
 
# Urwid doesn't support blinking, but we want it.  Since we have no
61
 
# use for underline on its own, we make underline also always blink.
62
 
urwid.curses_display.curses.A_UNDERLINE |= (
63
 
    urwid.curses_display.curses.A_BLINK)
64
 
 
65
 
def isoformat_to_datetime(iso):
66
 
    "Parse an ISO 8601 date string to a datetime.datetime()"
67
 
    if not iso:
68
 
        return None
69
 
    d, t = iso.split("T", 1)
70
 
    year, month, day = d.split("-", 2)
71
 
    hour, minute, second = t.split(":", 2)
72
 
    second, fraction = divmod(float(second), 1)
73
 
    return datetime.datetime(int(year),
74
 
                             int(month),
75
 
                             int(day),
76
 
                             int(hour),
77
 
                             int(minute),
78
 
                             int(second),           # Whole seconds
79
 
                             int(fraction*1000000)) # Microseconds
80
 
 
81
 
class MandosClientPropertyCache(object):
82
 
    """This wraps a Mandos Client D-Bus proxy object, caches the
83
 
    properties and calls a hook function when any of them are
84
 
    changed.
85
 
    """
86
 
    def __init__(self, proxy_object=None, *args, **kwargs):
87
 
        self.proxy = proxy_object # Mandos Client proxy object
88
 
        
89
 
        self.properties = dict()
90
 
        self.property_changed_match = (
91
 
            self.proxy.connect_to_signal("PropertyChanged",
92
 
                                         self.property_changed,
93
 
                                         client_interface,
94
 
                                         byte_arrays=True))
95
 
        
96
 
        self.properties.update(
97
 
            self.proxy.GetAll(client_interface,
98
 
                              dbus_interface = dbus.PROPERTIES_IFACE))
99
 
 
100
 
        #XXX This breaks good super behaviour
101
 
#        super(MandosClientPropertyCache, self).__init__(
102
 
#            *args, **kwargs)
103
 
    
104
 
    def property_changed(self, property=None, value=None):
105
 
        """This is called whenever we get a PropertyChanged signal
106
 
        It updates the changed property in the "properties" dict.
107
 
        """
108
 
        # Update properties dict with new value
109
 
        self.properties[property] = value
110
 
    
111
 
    def delete(self, *args, **kwargs):
112
 
        self.property_changed_match.remove()
113
 
        super(MandosClientPropertyCache, self).__init__(
114
 
            *args, **kwargs)
115
 
 
116
 
 
117
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
118
 
    """A Mandos Client which is visible on the screen.
119
 
    """
120
 
    
121
 
    def __init__(self, server_proxy_object=None, update_hook=None,
122
 
                 delete_hook=None, logger=None, *args, **kwargs):
123
 
        # Called on update
124
 
        self.update_hook = update_hook
125
 
        # Called on delete
126
 
        self.delete_hook = delete_hook
127
 
        # Mandos Server proxy object
128
 
        self.server_proxy_object = server_proxy_object
129
 
        # Logger
130
 
        self.logger = logger
131
 
        
132
 
        self._update_timer_callback_tag = None
133
 
        self._update_timer_callback_lock = 0
134
 
        self.last_checker_failed = False
135
 
        
136
 
        # The widget shown normally
137
 
        self._text_widget = urwid.Text("")
138
 
        # The widget shown when we have focus
139
 
        self._focus_text_widget = urwid.Text("")
140
 
        super(MandosClientWidget, self).__init__(
141
 
            update_hook=update_hook, delete_hook=delete_hook,
142
 
            *args, **kwargs)
143
 
        self.update()
144
 
        self.opened = False
145
 
        
146
 
        last_checked_ok = isoformat_to_datetime(self.properties
147
 
                                                ["LastCheckedOK"])
148
 
        if last_checked_ok is None:
149
 
            self.last_checker_failed = True
150
 
        else:
151
 
            self.last_checker_failed = ((datetime.datetime.utcnow()
152
 
                                         - last_checked_ok)
153
 
                                        > datetime.timedelta
154
 
                                        (milliseconds=
155
 
                                         self.properties
156
 
                                         ["Interval"]))
157
 
        
158
 
        if self.last_checker_failed:
159
 
            self.using_timer(True)
160
 
        
161
 
        if self.need_approval:
162
 
            self.using_timer(True)
163
 
        
164
 
        self.match_objects = (
165
 
            self.proxy.connect_to_signal("CheckerCompleted",
166
 
                                         self.checker_completed,
167
 
                                         client_interface,
168
 
                                         byte_arrays=True),
169
 
            self.proxy.connect_to_signal("CheckerStarted",
170
 
                                         self.checker_started,
171
 
                                         client_interface,
172
 
                                         byte_arrays=True),
173
 
            self.proxy.connect_to_signal("GotSecret",
174
 
                                         self.got_secret,
175
 
                                         client_interface,
176
 
                                         byte_arrays=True),
177
 
            self.proxy.connect_to_signal("NeedApproval",
178
 
                                         self.need_approval,
179
 
                                         client_interface,
180
 
                                         byte_arrays=True),
181
 
            self.proxy.connect_to_signal("Rejected",
182
 
                                         self.rejected,
183
 
                                         client_interface,
184
 
                                         byte_arrays=True))
185
 
        #self.logger('Created client %s' % (self.properties["Name"]))
186
 
    
187
 
    def property_changed(self, property=None, value=None):
188
 
        super(self, MandosClientWidget).property_changed(property,
189
 
                                                         value)
190
 
        if property == "ApprovalPending":
191
 
            using_timer(bool(value))
192
 
        
193
 
    def using_timer(self, flag):
194
 
        """Call this method with True or False when timer should be
195
 
        activated or deactivated.
196
 
        """
197
 
        old = self._update_timer_callback_lock
198
 
        if flag:
199
 
            self._update_timer_callback_lock += 1
200
 
        else:
201
 
            self._update_timer_callback_lock -= 1
202
 
        if old == 0 and self._update_timer_callback_lock:
203
 
            self._update_timer_callback_tag = (gobject.timeout_add
204
 
                                               (1000,
205
 
                                                self.update_timer))
206
 
        elif old and self._update_timer_callback_lock == 0:
207
 
            gobject.source_remove(self._update_timer_callback_tag)
208
 
            self._update_timer_callback_tag = None
209
 
    
210
 
    def checker_completed(self, exitstatus, condition, command):
211
 
        if exitstatus == 0:
212
 
            if self.last_checker_failed:
213
 
                self.last_checker_failed = False
214
 
                self.using_timer(False)
215
 
            #self.logger('Checker for client %s (command "%s")'
216
 
            #            ' was successful'
217
 
            #            % (self.properties["Name"], command))
218
 
            self.update()
219
 
            return
220
 
        # Checker failed
221
 
        if not self.last_checker_failed:
222
 
            self.last_checker_failed = True
223
 
            self.using_timer(True)
224
 
        if os.WIFEXITED(condition):
225
 
            self.logger('Checker for client %s (command "%s")'
226
 
                        ' failed with exit code %s'
227
 
                        % (self.properties["Name"], command,
228
 
                           os.WEXITSTATUS(condition)))
229
 
        elif os.WIFSIGNALED(condition):
230
 
            self.logger('Checker for client %s (command "%s")'
231
 
                        ' was killed by signal %s'
232
 
                        % (self.properties["Name"], command,
233
 
                           os.WTERMSIG(condition)))
234
 
        elif os.WCOREDUMP(condition):
235
 
            self.logger('Checker for client %s (command "%s")'
236
 
                        ' dumped core'
237
 
                        % (self.properties["Name"], command))
238
 
        else:
239
 
            self.logger('Checker for client %s completed'
240
 
                        ' mysteriously')
241
 
        self.update()
242
 
    
243
 
    def checker_started(self, command):
244
 
        #self.logger('Client %s started checker "%s"'
245
 
        #            % (self.properties["Name"], unicode(command)))
246
 
        pass
247
 
    
248
 
    def got_secret(self):
249
 
        self.last_checker_failed = False
250
 
        self.logger('Client %s received its secret'
251
 
                    % self.properties["Name"])
252
 
    
253
 
    def need_approval(self, timeout, default):
254
 
        if not default:
255
 
            message = 'Client %s needs approval within %s seconds'
256
 
        else:
257
 
            message = 'Client %s will get its secret in %s seconds'
258
 
        self.logger(message
259
 
                    % (self.properties["Name"], timeout/1000))
260
 
        self.using_timer(True)
261
 
    
262
 
    def rejected(self, reason):
263
 
        self.logger('Client %s was rejected; reason: %s'
264
 
                    % (self.properties["Name"], reason))
265
 
    
266
 
    def selectable(self):
267
 
        """Make this a "selectable" widget.
268
 
        This overrides the method from urwid.FlowWidget."""
269
 
        return True
270
 
    
271
 
    def rows(self, maxcolrow, focus=False):
272
 
        """How many rows this widget will occupy might depend on
273
 
        whether we have focus or not.
274
 
        This overrides the method from urwid.FlowWidget"""
275
 
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
276
 
    
277
 
    def current_widget(self, focus=False):
278
 
        if focus or self.opened:
279
 
            return self._focus_widget
280
 
        return self._widget
281
 
    
282
 
    def update(self):
283
 
        "Called when what is visible on the screen should be updated."
284
 
        # How to add standout mode to a style
285
 
        with_standout = { "normal": "standout",
286
 
                          "bold": "bold-standout",
287
 
                          "underline-blink":
288
 
                              "underline-blink-standout",
289
 
                          "bold-underline-blink":
290
 
                              "bold-underline-blink-standout",
291
 
                          }
292
 
 
293
 
        # Rebuild focus and non-focus widgets using current properties
294
 
 
295
 
        # Base part of a client. Name!
296
 
        base = ('%(name)s: '
297
 
                      % {"name": self.properties["Name"]})
298
 
        if not self.properties["Enabled"]:
299
 
            message = "DISABLED"
300
 
        elif self.properties["ApprovalPending"]:
301
 
            timeout = datetime.timedelta(milliseconds
302
 
                                         = self.properties
303
 
                                         ["ApprovalDelay"])
304
 
            last_approval_request = isoformat_to_datetime(
305
 
                self.properties["LastApprovalRequest"])
306
 
            if last_approval_request is not None:
307
 
                timer = timeout - (datetime.datetime.utcnow()
308
 
                                   - last_approval_request)
309
 
            else:
310
 
                timer = datetime.timedelta()
311
 
            if self.properties["ApprovedByDefault"]:
312
 
                message = "Approval in %s. (d)eny?"
313
 
            else:
314
 
                message = "Denial in %s. (a)pprove?"
315
 
            message = message % unicode(timer).rsplit(".", 1)[0]
316
 
        elif self.last_checker_failed:
317
 
            timeout = datetime.timedelta(milliseconds
318
 
                                         = self.properties
319
 
                                         ["Timeout"])
320
 
            last_ok = isoformat_to_datetime(
321
 
                max((self.properties["LastCheckedOK"]
322
 
                     or self.properties["Created"]),
323
 
                    self.properties["LastEnabled"]))
324
 
            timer = timeout - (datetime.datetime.utcnow() - last_ok)
325
 
            message = ('A checker has failed! Time until client'
326
 
                       ' gets disabled: %s'
327
 
                           % unicode(timer).rsplit(".", 1)[0])
328
 
        else:
329
 
            message = "enabled"
330
 
        self._text = "%s%s" % (base, message)
331
 
            
332
 
        if not urwid.supports_unicode():
333
 
            self._text = self._text.encode("ascii", "replace")
334
 
        textlist = [("normal", self._text)]
335
 
        self._text_widget.set_text(textlist)
336
 
        self._focus_text_widget.set_text([(with_standout[text[0]],
337
 
                                           text[1])
338
 
                                          if isinstance(text, tuple)
339
 
                                          else text
340
 
                                          for text in textlist])
341
 
        self._widget = self._text_widget
342
 
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
343
 
                                            "standout")
344
 
        # Run update hook, if any
345
 
        if self.update_hook is not None:
346
 
            self.update_hook()
347
 
    
348
 
    def update_timer(self):
349
 
        "called by gobject"
350
 
        self.update()
351
 
        return True             # Keep calling this
352
 
    
353
 
    def delete(self, *args, **kwargs):
354
 
        if self._update_timer_callback_tag is not None:
355
 
            gobject.source_remove(self._update_timer_callback_tag)
356
 
            self._update_timer_callback_tag = None
357
 
        for match in self.match_objects:
358
 
            match.remove()
359
 
        self.match_objects = ()
360
 
        if self.delete_hook is not None:
361
 
            self.delete_hook(self)
362
 
        return super(MandosClientWidget, self).delete(*args, **kwargs)
363
 
    
364
 
    def render(self, maxcolrow, focus=False):
365
 
        """Render differently if we have focus.
366
 
        This overrides the method from urwid.FlowWidget"""
367
 
        return self.current_widget(focus).render(maxcolrow,
368
 
                                                 focus=focus)
369
 
    
370
 
    def keypress(self, maxcolrow, key):
371
 
        """Handle keys.
372
 
        This overrides the method from urwid.FlowWidget"""
373
 
        if key == "+":
374
 
            self.proxy.Enable(dbus_interface = client_interface,
375
 
                              ignore_reply=True)
376
 
        elif key == "-":
377
 
            self.proxy.Disable(dbus_interface = client_interface,
378
 
                               ignore_reply=True)
379
 
        elif key == "a":
380
 
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
381
 
                               dbus_interface = client_interface,
382
 
                               ignore_reply=True)
383
 
        elif key == "d":
384
 
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
385
 
                                  dbus_interface = client_interface,
386
 
                               ignore_reply=True)
387
 
        elif key == "R" or key == "_" or key == "ctrl k":
388
 
            self.server_proxy_object.RemoveClient(self.proxy
389
 
                                                  .object_path,
390
 
                                                  ignore_reply=True)
391
 
        elif key == "s":
392
 
            self.proxy.StartChecker(dbus_interface = client_interface,
393
 
                                    ignore_reply=True)
394
 
        elif key == "S":
395
 
            self.proxy.StopChecker(dbus_interface = client_interface,
396
 
                                   ignore_reply=True)
397
 
        elif key == "C":
398
 
            self.proxy.CheckedOK(dbus_interface = client_interface,
399
 
                                 ignore_reply=True)
400
 
        # xxx
401
 
#         elif key == "p" or key == "=":
402
 
#             self.proxy.pause()
403
 
#         elif key == "u" or key == ":":
404
 
#             self.proxy.unpause()
405
 
#         elif key == "RET":
406
 
#             self.open()
407
 
        else:
408
 
            return key
409
 
    
410
 
    def property_changed(self, property=None, value=None,
411
 
                         *args, **kwargs):
412
 
        """Call self.update() if old value is not new value.
413
 
        This overrides the method from MandosClientPropertyCache"""
414
 
        property_name = unicode(property)
415
 
        old_value = self.properties.get(property_name)
416
 
        super(MandosClientWidget, self).property_changed(
417
 
            property=property, value=value, *args, **kwargs)
418
 
        if self.properties.get(property_name) != old_value:
419
 
            self.update()
420
 
 
421
 
 
422
 
class ConstrainedListBox(urwid.ListBox):
423
 
    """Like a normal urwid.ListBox, but will consume all "up" or
424
 
    "down" key presses, thus not allowing any containing widgets to
425
 
    use them as an excuse to shift focus away from this widget.
426
 
    """
427
 
    def keypress(self, maxcolrow, key):
428
 
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
429
 
        if ret in ("up", "down"):
430
 
            return
431
 
        return ret
432
 
 
433
 
 
434
 
class UserInterface(object):
435
 
    """This is the entire user interface - the whole screen
436
 
    with boxes, lists of client widgets, etc.
437
 
    """
438
 
    def __init__(self, max_log_length=1000):
439
 
        DBusGMainLoop(set_as_default=True)
440
 
        
441
 
        self.screen = urwid.curses_display.Screen()
442
 
        
443
 
        self.screen.register_palette((
444
 
                ("normal",
445
 
                 "default", "default", None),
446
 
                ("bold",
447
 
                 "default", "default", "bold"),
448
 
                ("underline-blink",
449
 
                 "default", "default", "underline"),
450
 
                ("standout",
451
 
                 "default", "default", "standout"),
452
 
                ("bold-underline-blink",
453
 
                 "default", "default", ("bold", "underline")),
454
 
                ("bold-standout",
455
 
                 "default", "default", ("bold", "standout")),
456
 
                ("underline-blink-standout",
457
 
                 "default", "default", ("underline", "standout")),
458
 
                ("bold-underline-blink-standout",
459
 
                 "default", "default", ("bold", "underline",
460
 
                                          "standout")),
461
 
                ))
462
 
        
463
 
        if urwid.supports_unicode():
464
 
            self.divider = "─" # \u2500
465
 
            #self.divider = "━" # \u2501
466
 
        else:
467
 
            #self.divider = "-" # \u002d
468
 
            self.divider = "_" # \u005f
469
 
        
470
 
        self.screen.start()
471
 
        
472
 
        self.size = self.screen.get_cols_rows()
473
 
        
474
 
        self.clients = urwid.SimpleListWalker([])
475
 
        self.clients_dict = {}
476
 
        
477
 
        # We will add Text widgets to this list
478
 
        self.log = []
479
 
        self.max_log_length = max_log_length
480
 
        
481
 
        # We keep a reference to the log widget so we can remove it
482
 
        # from the ListWalker without it getting destroyed
483
 
        self.logbox = ConstrainedListBox(self.log)
484
 
        
485
 
        # This keeps track of whether self.uilist currently has
486
 
        # self.logbox in it or not
487
 
        self.log_visible = True
488
 
        self.log_wrap = "any"
489
 
        
490
 
        self.rebuild()
491
 
        self.log_message_raw(("bold",
492
 
                              "Mandos Monitor version " + version))
493
 
        self.log_message_raw(("bold",
494
 
                              "q: Quit  ?: Help"))
495
 
        
496
 
        self.busname = domain + '.Mandos'
497
 
        self.main_loop = gobject.MainLoop()
498
 
        self.bus = dbus.SystemBus()
499
 
        mandos_dbus_objc = self.bus.get_object(
500
 
            self.busname, "/", follow_name_owner_changes=True)
501
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
502
 
                                          dbus_interface
503
 
                                          = server_interface)
504
 
        try:
505
 
            mandos_clients = (self.mandos_serv
506
 
                              .GetAllClientsWithProperties())
507
 
        except dbus.exceptions.DBusException:
508
 
            mandos_clients = dbus.Dictionary()
509
 
        
510
 
        (self.mandos_serv
511
 
         .connect_to_signal("ClientRemoved",
512
 
                            self.find_and_remove_client,
513
 
                            dbus_interface=server_interface,
514
 
                            byte_arrays=True))
515
 
        (self.mandos_serv
516
 
         .connect_to_signal("ClientAdded",
517
 
                            self.add_new_client,
518
 
                            dbus_interface=server_interface,
519
 
                            byte_arrays=True))
520
 
        (self.mandos_serv
521
 
         .connect_to_signal("ClientNotFound",
522
 
                            self.client_not_found,
523
 
                            dbus_interface=server_interface,
524
 
                            byte_arrays=True))
525
 
        for path, client in mandos_clients.iteritems():
526
 
            client_proxy_object = self.bus.get_object(self.busname,
527
 
                                                      path)
528
 
            self.add_client(MandosClientWidget(server_proxy_object
529
 
                                               =self.mandos_serv,
530
 
                                               proxy_object
531
 
                                               =client_proxy_object,
532
 
                                               properties=client,
533
 
                                               update_hook
534
 
                                               =self.refresh,
535
 
                                               delete_hook
536
 
                                               =self.remove_client,
537
 
                                               logger
538
 
                                               =self.log_message),
539
 
                            path=path)
540
 
    
541
 
    def client_not_found(self, fingerprint, address):
542
 
        self.log_message(("Client with address %s and fingerprint %s"
543
 
                          " could not be found" % (address,
544
 
                                                    fingerprint)))
545
 
    
546
 
    def rebuild(self):
547
 
        """This rebuilds the User Interface.
548
 
        Call this when the widget layout needs to change"""
549
 
        self.uilist = []
550
 
        #self.uilist.append(urwid.ListBox(self.clients))
551
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
552
 
                                                          clients),
553
 
                                       #header=urwid.Divider(),
554
 
                                       header=None,
555
 
                                       footer=
556
 
                                       urwid.Divider(div_char=
557
 
                                                     self.divider)))
558
 
        if self.log_visible:
559
 
            self.uilist.append(self.logbox)
560
 
            pass
561
 
        self.topwidget = urwid.Pile(self.uilist)
562
 
    
563
 
    def log_message(self, message):
564
 
        timestamp = datetime.datetime.now().isoformat()
565
 
        self.log_message_raw(timestamp + ": " + message)
566
 
    
567
 
    def log_message_raw(self, markup):
568
 
        """Add a log message to the log buffer."""
569
 
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
570
 
        if (self.max_log_length
571
 
            and len(self.log) > self.max_log_length):
572
 
            del self.log[0:len(self.log)-self.max_log_length-1]
573
 
        self.logbox.set_focus(len(self.logbox.body.contents),
574
 
                              coming_from="above")
575
 
        self.refresh()
576
 
    
577
 
    def toggle_log_display(self):
578
 
        """Toggle visibility of the log buffer."""
579
 
        self.log_visible = not self.log_visible
580
 
        self.rebuild()
581
 
        #self.log_message("Log visibility changed to: "
582
 
        #                 + unicode(self.log_visible))
583
 
    
584
 
    def change_log_display(self):
585
 
        """Change type of log display.
586
 
        Currently, this toggles wrapping of text lines."""
587
 
        if self.log_wrap == "clip":
588
 
            self.log_wrap = "any"
589
 
        else:
590
 
            self.log_wrap = "clip"
591
 
        for textwidget in self.log:
592
 
            textwidget.set_wrap_mode(self.log_wrap)
593
 
        #self.log_message("Wrap mode: " + self.log_wrap)
594
 
    
595
 
    def find_and_remove_client(self, path, name):
596
 
        """Find a client by its object path and remove it.
597
 
        
598
 
        This is connected to the ClientRemoved signal from the
599
 
        Mandos server object."""
600
 
        try:
601
 
            client = self.clients_dict[path]
602
 
        except KeyError:
603
 
            # not found?
604
 
            self.log_message("Unknown client %r (%r) removed", name,
605
 
                             path)
606
 
            return
607
 
        client.delete()
608
 
    
609
 
    def add_new_client(self, path):
610
 
        client_proxy_object = self.bus.get_object(self.busname, path)
611
 
        self.add_client(MandosClientWidget(server_proxy_object
612
 
                                           =self.mandos_serv,
613
 
                                           proxy_object
614
 
                                           =client_proxy_object,
615
 
                                           update_hook
616
 
                                           =self.refresh,
617
 
                                           delete_hook
618
 
                                           =self.remove_client,
619
 
                                           logger
620
 
                                           =self.log_message),
621
 
                        path=path)
622
 
    
623
 
    def add_client(self, client, path=None):
624
 
        self.clients.append(client)
625
 
        if path is None:
626
 
            path = client.proxy.object_path
627
 
        self.clients_dict[path] = client
628
 
        self.clients.sort(None, lambda c: c.properties["Name"])
629
 
        self.refresh()
630
 
    
631
 
    def remove_client(self, client, path=None):
632
 
        self.clients.remove(client)
633
 
        if path is None:
634
 
            path = client.proxy.object_path
635
 
        del self.clients_dict[path]
636
 
        if not self.clients_dict:
637
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
638
 
            # is completely emptied, we need to recreate it.
639
 
            self.clients = urwid.SimpleListWalker([])
640
 
            self.rebuild()
641
 
        self.refresh()
642
 
    
643
 
    def refresh(self):
644
 
        """Redraw the screen"""
645
 
        canvas = self.topwidget.render(self.size, focus=True)
646
 
        self.screen.draw_screen(self.size, canvas)
647
 
    
648
 
    def run(self):
649
 
        """Start the main loop and exit when it's done."""
650
 
        self.refresh()
651
 
        self._input_callback_tag = (gobject.io_add_watch
652
 
                                    (sys.stdin.fileno(),
653
 
                                     gobject.IO_IN,
654
 
                                     self.process_input))
655
 
        self.main_loop.run()
656
 
        # Main loop has finished, we should close everything now
657
 
        gobject.source_remove(self._input_callback_tag)
658
 
        self.screen.stop()
659
 
    
660
 
    def stop(self):
661
 
        self.main_loop.quit()
662
 
    
663
 
    def process_input(self, source, condition):
664
 
        keys = self.screen.get_input()
665
 
        translations = { "ctrl n": "down",      # Emacs
666
 
                         "ctrl p": "up",        # Emacs
667
 
                         "ctrl v": "page down", # Emacs
668
 
                         "meta v": "page up",   # Emacs
669
 
                         " ": "page down",      # less
670
 
                         "f": "page down",      # less
671
 
                         "b": "page up",        # less
672
 
                         "j": "down",           # vi
673
 
                         "k": "up",             # vi
674
 
                         }
675
 
        for key in keys:
676
 
            try:
677
 
                key = translations[key]
678
 
            except KeyError:    # :-)
679
 
                pass
680
 
            
681
 
            if key == "q" or key == "Q":
682
 
                self.stop()
683
 
                break
684
 
            elif key == "window resize":
685
 
                self.size = self.screen.get_cols_rows()
686
 
                self.refresh()
687
 
            elif key == "\f":  # Ctrl-L
688
 
                self.refresh()
689
 
            elif key == "l" or key == "D":
690
 
                self.toggle_log_display()
691
 
                self.refresh()
692
 
            elif key == "w" or key == "i":
693
 
                self.change_log_display()
694
 
                self.refresh()
695
 
            elif key == "?" or key == "f1" or key == "esc":
696
 
                if not self.log_visible:
697
 
                    self.log_visible = True
698
 
                    self.rebuild()
699
 
                self.log_message_raw(("bold",
700
 
                                      "  ".
701
 
                                      join(("q: Quit",
702
 
                                            "?: Help",
703
 
                                            "l: Log window toggle",
704
 
                                            "TAB: Switch window",
705
 
                                            "w: Wrap (log)"))))
706
 
                self.log_message_raw(("bold",
707
 
                                      "  "
708
 
                                      .join(("Clients:",
709
 
                                             "+: Enable",
710
 
                                             "-: Disable",
711
 
                                             "R: Remove",
712
 
                                             "s: Start new checker",
713
 
                                             "S: Stop checker",
714
 
                                             "C: Checker OK",
715
 
                                             "a: Approve",
716
 
                                             "d: Deny"))))
717
 
                self.refresh()
718
 
            elif key == "tab":
719
 
                if self.topwidget.get_focus() is self.logbox:
720
 
                    self.topwidget.set_focus(0)
721
 
                else:
722
 
                    self.topwidget.set_focus(self.logbox)
723
 
                self.refresh()
724
 
            #elif (key == "end" or key == "meta >" or key == "G"
725
 
            #      or key == ">"):
726
 
            #    pass            # xxx end-of-buffer
727
 
            #elif (key == "home" or key == "meta <" or key == "g"
728
 
            #      or key == "<"):
729
 
            #    pass            # xxx beginning-of-buffer
730
 
            #elif key == "ctrl e" or key == "$":
731
 
            #    pass            # xxx move-end-of-line
732
 
            #elif key == "ctrl a" or key == "^":
733
 
            #    pass            # xxx move-beginning-of-line
734
 
            #elif key == "ctrl b" or key == "meta (" or key == "h":
735
 
            #    pass            # xxx left
736
 
            #elif key == "ctrl f" or key == "meta )" or key == "l":
737
 
            #    pass            # xxx right
738
 
            #elif key == "a":
739
 
            #    pass            # scroll up log
740
 
            #elif key == "z":
741
 
            #    pass            # scroll down log
742
 
            elif self.topwidget.selectable():
743
 
                self.topwidget.keypress(self.size, key)
744
 
                self.refresh()
745
 
        return True
746
 
 
747
 
ui = UserInterface()
748
 
try:
749
 
    ui.run()
750
 
except KeyboardInterrupt:
751
 
    ui.screen.stop()
752
 
except Exception, e:
753
 
    ui.log_message(unicode(e))
754
 
    ui.screen.stop()
755
 
    raise