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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@recompile.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.recompile'
 
53
server_interface = domain + '.Mandos'
 
54
client_interface = domain + '.Mandos.Client'
 
55
version = "1.4.1"
 
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
            # Will update the shown timer value every second
 
204
            self._update_timer_callback_tag = (gobject.timeout_add
 
205
                                               (1000,
 
206
                                                self.update_timer))
 
207
        elif old and self._update_timer_callback_lock == 0:
 
208
            gobject.source_remove(self._update_timer_callback_tag)
 
209
            self._update_timer_callback_tag = None
 
210
    
 
211
    def checker_completed(self, exitstatus, condition, command):
 
212
        if exitstatus == 0:
 
213
            if self.last_checker_failed:
 
214
                self.last_checker_failed = False
 
215
                self.using_timer(False)
 
216
            #self.logger('Checker for client %s (command "%s")'
 
217
            #            ' was successful'
 
218
            #            % (self.properties["Name"], command))
 
219
            self.update()
 
220
            return
 
221
        # Checker failed
 
222
        if not self.last_checker_failed:
 
223
            self.last_checker_failed = True
 
224
            self.using_timer(True)
 
225
        if os.WIFEXITED(condition):
 
226
            self.logger('Checker for client %s (command "%s")'
 
227
                        ' failed with exit code %s'
 
228
                        % (self.properties["Name"], command,
 
229
                           os.WEXITSTATUS(condition)))
 
230
        elif os.WIFSIGNALED(condition):
 
231
            self.logger('Checker for client %s (command "%s")'
 
232
                        ' was killed by signal %s'
 
233
                        % (self.properties["Name"], command,
 
234
                           os.WTERMSIG(condition)))
 
235
        elif os.WCOREDUMP(condition):
 
236
            self.logger('Checker for client %s (command "%s")'
 
237
                        ' dumped core'
 
238
                        % (self.properties["Name"], command))
 
239
        else:
 
240
            self.logger('Checker for client %s completed'
 
241
                        ' mysteriously')
 
242
        self.update()
 
243
    
 
244
    def checker_started(self, command):
 
245
        #self.logger('Client %s started checker "%s"'
 
246
        #            % (self.properties["Name"], unicode(command)))
 
247
        pass
 
248
    
 
249
    def got_secret(self):
 
250
        self.last_checker_failed = False
 
251
        self.logger('Client %s received its secret'
 
252
                    % self.properties["Name"])
 
253
    
 
254
    def need_approval(self, timeout, default):
 
255
        if not default:
 
256
            message = 'Client %s needs approval within %s seconds'
 
257
        else:
 
258
            message = 'Client %s will get its secret in %s seconds'
 
259
        self.logger(message
 
260
                    % (self.properties["Name"], timeout/1000))
 
261
        self.using_timer(True)
 
262
    
 
263
    def rejected(self, reason):
 
264
        self.logger('Client %s was rejected; reason: %s'
 
265
                    % (self.properties["Name"], reason))
 
266
    
 
267
    def selectable(self):
 
268
        """Make this a "selectable" widget.
 
269
        This overrides the method from urwid.FlowWidget."""
 
270
        return True
 
271
    
 
272
    def rows(self, maxcolrow, focus=False):
 
273
        """How many rows this widget will occupy might depend on
 
274
        whether we have focus or not.
 
275
        This overrides the method from urwid.FlowWidget"""
 
276
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
277
    
 
278
    def current_widget(self, focus=False):
 
279
        if focus or self.opened:
 
280
            return self._focus_widget
 
281
        return self._widget
 
282
    
 
283
    def update(self):
 
284
        "Called when what is visible on the screen should be updated."
 
285
        # How to add standout mode to a style
 
286
        with_standout = { "normal": "standout",
 
287
                          "bold": "bold-standout",
 
288
                          "underline-blink":
 
289
                              "underline-blink-standout",
 
290
                          "bold-underline-blink":
 
291
                              "bold-underline-blink-standout",
 
292
                          }
 
293
 
 
294
        # Rebuild focus and non-focus widgets using current properties
 
295
 
 
296
        # Base part of a client. Name!
 
297
        base = ('%(name)s: '
 
298
                      % {"name": self.properties["Name"]})
 
299
        if not self.properties["Enabled"]:
 
300
            message = "DISABLED"
 
301
        elif self.properties["ApprovalPending"]:
 
302
            timeout = datetime.timedelta(milliseconds
 
303
                                         = self.properties
 
304
                                         ["ApprovalDelay"])
 
305
            last_approval_request = isoformat_to_datetime(
 
306
                self.properties["LastApprovalRequest"])
 
307
            if last_approval_request is not None:
 
308
                timer = timeout - (datetime.datetime.utcnow()
 
309
                                   - last_approval_request)
 
310
            else:
 
311
                timer = datetime.timedelta()
 
312
            if self.properties["ApprovedByDefault"]:
 
313
                message = "Approval in %s. (d)eny?"
 
314
            else:
 
315
                message = "Denial in %s. (a)pprove?"
 
316
            message = message % unicode(timer).rsplit(".", 1)[0]
 
317
        elif self.last_checker_failed:
 
318
            # When checker has failed, print a timer until client expires
 
319
            expires = self.properties["Expires"]
 
320
            if expires == "":
 
321
                timer = datetime.timedelta(0)
 
322
            else:
 
323
                expires = datetime.datetime.strptime(expires,
 
324
                                                     '%Y-%m-%dT%H:%M:%S.%f')
 
325
                timer = expires - datetime.datetime.utcnow()
 
326
            message = ('A checker has failed! Time until client'
 
327
                       ' gets disabled: %s'
 
328
                           % unicode(timer).rsplit(".", 1)[0])
 
329
        else:
 
330
            message = "enabled"
 
331
        self._text = "%s%s" % (base, message)
 
332
            
 
333
        if not urwid.supports_unicode():
 
334
            self._text = self._text.encode("ascii", "replace")
 
335
        textlist = [("normal", self._text)]
 
336
        self._text_widget.set_text(textlist)
 
337
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
338
                                           text[1])
 
339
                                          if isinstance(text, tuple)
 
340
                                          else text
 
341
                                          for text in textlist])
 
342
        self._widget = self._text_widget
 
343
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
344
                                            "standout")
 
345
        # Run update hook, if any
 
346
        if self.update_hook is not None:
 
347
            self.update_hook()
 
348
    
 
349
    def update_timer(self):
 
350
        """called by gobject. Will indefinitely loop until
 
351
        gobject.source_remove() on tag is called"""
 
352
        self.update()
 
353
        return True             # Keep calling this
 
354
    
 
355
    def delete(self, *args, **kwargs):
 
356
        if self._update_timer_callback_tag is not None:
 
357
            gobject.source_remove(self._update_timer_callback_tag)
 
358
            self._update_timer_callback_tag = None
 
359
        for match in self.match_objects:
 
360
            match.remove()
 
361
        self.match_objects = ()
 
362
        if self.delete_hook is not None:
 
363
            self.delete_hook(self)
 
364
        return super(MandosClientWidget, self).delete(*args, **kwargs)
 
365
    
 
366
    def render(self, maxcolrow, focus=False):
 
367
        """Render differently if we have focus.
 
368
        This overrides the method from urwid.FlowWidget"""
 
369
        return self.current_widget(focus).render(maxcolrow,
 
370
                                                 focus=focus)
 
371
    
 
372
    def keypress(self, maxcolrow, key):
 
373
        """Handle keys.
 
374
        This overrides the method from urwid.FlowWidget"""
 
375
        if key == "+":
 
376
            self.proxy.Enable(dbus_interface = client_interface,
 
377
                              ignore_reply=True)
 
378
        elif key == "-":
 
379
            self.proxy.Disable(dbus_interface = client_interface,
 
380
                               ignore_reply=True)
 
381
        elif key == "a":
 
382
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
383
                               dbus_interface = client_interface,
 
384
                               ignore_reply=True)
 
385
        elif key == "d":
 
386
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
387
                                  dbus_interface = client_interface,
 
388
                               ignore_reply=True)
 
389
        elif key == "R" or key == "_" or key == "ctrl k":
 
390
            self.server_proxy_object.RemoveClient(self.proxy
 
391
                                                  .object_path,
 
392
                                                  ignore_reply=True)
 
393
        elif key == "s":
 
394
            self.proxy.StartChecker(dbus_interface = client_interface,
 
395
                                    ignore_reply=True)
 
396
        elif key == "S":
 
397
            self.proxy.StopChecker(dbus_interface = client_interface,
 
398
                                   ignore_reply=True)
 
399
        elif key == "C":
 
400
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
401
                                 ignore_reply=True)
 
402
        # xxx
 
403
#         elif key == "p" or key == "=":
 
404
#             self.proxy.pause()
 
405
#         elif key == "u" or key == ":":
 
406
#             self.proxy.unpause()
 
407
#         elif key == "RET":
 
408
#             self.open()
 
409
        else:
 
410
            return key
 
411
    
 
412
    def property_changed(self, property=None, value=None,
 
413
                         *args, **kwargs):
 
414
        """Call self.update() if old value is not new value.
 
415
        This overrides the method from MandosClientPropertyCache"""
 
416
        property_name = unicode(property)
 
417
        old_value = self.properties.get(property_name)
 
418
        super(MandosClientWidget, self).property_changed(
 
419
            property=property, value=value, *args, **kwargs)
 
420
        if self.properties.get(property_name) != old_value:
 
421
            self.update()
 
422
 
 
423
 
 
424
class ConstrainedListBox(urwid.ListBox):
 
425
    """Like a normal urwid.ListBox, but will consume all "up" or
 
426
    "down" key presses, thus not allowing any containing widgets to
 
427
    use them as an excuse to shift focus away from this widget.
 
428
    """
 
429
    def keypress(self, maxcolrow, key):
 
430
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
 
431
        if ret in ("up", "down"):
 
432
            return
 
433
        return ret
 
434
 
 
435
 
 
436
class UserInterface(object):
 
437
    """This is the entire user interface - the whole screen
 
438
    with boxes, lists of client widgets, etc.
 
439
    """
 
440
    def __init__(self, max_log_length=1000):
 
441
        DBusGMainLoop(set_as_default=True)
 
442
        
 
443
        self.screen = urwid.curses_display.Screen()
 
444
        
 
445
        self.screen.register_palette((
 
446
                ("normal",
 
447
                 "default", "default", None),
 
448
                ("bold",
 
449
                 "default", "default", "bold"),
 
450
                ("underline-blink",
 
451
                 "default", "default", "underline"),
 
452
                ("standout",
 
453
                 "default", "default", "standout"),
 
454
                ("bold-underline-blink",
 
455
                 "default", "default", ("bold", "underline")),
 
456
                ("bold-standout",
 
457
                 "default", "default", ("bold", "standout")),
 
458
                ("underline-blink-standout",
 
459
                 "default", "default", ("underline", "standout")),
 
460
                ("bold-underline-blink-standout",
 
461
                 "default", "default", ("bold", "underline",
 
462
                                          "standout")),
 
463
                ))
 
464
        
 
465
        if urwid.supports_unicode():
 
466
            self.divider = "─" # \u2500
 
467
            #self.divider = "━" # \u2501
 
468
        else:
 
469
            #self.divider = "-" # \u002d
 
470
            self.divider = "_" # \u005f
 
471
        
 
472
        self.screen.start()
 
473
        
 
474
        self.size = self.screen.get_cols_rows()
 
475
        
 
476
        self.clients = urwid.SimpleListWalker([])
 
477
        self.clients_dict = {}
 
478
        
 
479
        # We will add Text widgets to this list
 
480
        self.log = []
 
481
        self.max_log_length = max_log_length
 
482
        
 
483
        # We keep a reference to the log widget so we can remove it
 
484
        # from the ListWalker without it getting destroyed
 
485
        self.logbox = ConstrainedListBox(self.log)
 
486
        
 
487
        # This keeps track of whether self.uilist currently has
 
488
        # self.logbox in it or not
 
489
        self.log_visible = True
 
490
        self.log_wrap = "any"
 
491
        
 
492
        self.rebuild()
 
493
        self.log_message_raw(("bold",
 
494
                              "Mandos Monitor version " + version))
 
495
        self.log_message_raw(("bold",
 
496
                              "q: Quit  ?: Help"))
 
497
        
 
498
        self.busname = domain + '.Mandos'
 
499
        self.main_loop = gobject.MainLoop()
 
500
        self.bus = dbus.SystemBus()
 
501
        mandos_dbus_objc = self.bus.get_object(
 
502
            self.busname, "/", follow_name_owner_changes=True)
 
503
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
504
                                          dbus_interface
 
505
                                          = server_interface)
 
506
        try:
 
507
            mandos_clients = (self.mandos_serv
 
508
                              .GetAllClientsWithProperties())
 
509
        except dbus.exceptions.DBusException:
 
510
            mandos_clients = dbus.Dictionary()
 
511
        
 
512
        (self.mandos_serv
 
513
         .connect_to_signal("ClientRemoved",
 
514
                            self.find_and_remove_client,
 
515
                            dbus_interface=server_interface,
 
516
                            byte_arrays=True))
 
517
        (self.mandos_serv
 
518
         .connect_to_signal("ClientAdded",
 
519
                            self.add_new_client,
 
520
                            dbus_interface=server_interface,
 
521
                            byte_arrays=True))
 
522
        (self.mandos_serv
 
523
         .connect_to_signal("ClientNotFound",
 
524
                            self.client_not_found,
 
525
                            dbus_interface=server_interface,
 
526
                            byte_arrays=True))
 
527
        for path, client in mandos_clients.iteritems():
 
528
            client_proxy_object = self.bus.get_object(self.busname,
 
529
                                                      path)
 
530
            self.add_client(MandosClientWidget(server_proxy_object
 
531
                                               =self.mandos_serv,
 
532
                                               proxy_object
 
533
                                               =client_proxy_object,
 
534
                                               properties=client,
 
535
                                               update_hook
 
536
                                               =self.refresh,
 
537
                                               delete_hook
 
538
                                               =self.remove_client,
 
539
                                               logger
 
540
                                               =self.log_message),
 
541
                            path=path)
 
542
    
 
543
    def client_not_found(self, fingerprint, address):
 
544
        self.log_message(("Client with address %s and fingerprint %s"
 
545
                          " could not be found" % (address,
 
546
                                                    fingerprint)))
 
547
    
 
548
    def rebuild(self):
 
549
        """This rebuilds the User Interface.
 
550
        Call this when the widget layout needs to change"""
 
551
        self.uilist = []
 
552
        #self.uilist.append(urwid.ListBox(self.clients))
 
553
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
554
                                                          clients),
 
555
                                       #header=urwid.Divider(),
 
556
                                       header=None,
 
557
                                       footer=
 
558
                                       urwid.Divider(div_char=
 
559
                                                     self.divider)))
 
560
        if self.log_visible:
 
561
            self.uilist.append(self.logbox)
 
562
            pass
 
563
        self.topwidget = urwid.Pile(self.uilist)
 
564
    
 
565
    def log_message(self, message):
 
566
        timestamp = datetime.datetime.now().isoformat()
 
567
        self.log_message_raw(timestamp + ": " + message)
 
568
    
 
569
    def log_message_raw(self, markup):
 
570
        """Add a log message to the log buffer."""
 
571
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
572
        if (self.max_log_length
 
573
            and len(self.log) > self.max_log_length):
 
574
            del self.log[0:len(self.log)-self.max_log_length-1]
 
575
        self.logbox.set_focus(len(self.logbox.body.contents),
 
576
                              coming_from="above")
 
577
        self.refresh()
 
578
    
 
579
    def toggle_log_display(self):
 
580
        """Toggle visibility of the log buffer."""
 
581
        self.log_visible = not self.log_visible
 
582
        self.rebuild()
 
583
        #self.log_message("Log visibility changed to: "
 
584
        #                 + unicode(self.log_visible))
 
585
    
 
586
    def change_log_display(self):
 
587
        """Change type of log display.
 
588
        Currently, this toggles wrapping of text lines."""
 
589
        if self.log_wrap == "clip":
 
590
            self.log_wrap = "any"
 
591
        else:
 
592
            self.log_wrap = "clip"
 
593
        for textwidget in self.log:
 
594
            textwidget.set_wrap_mode(self.log_wrap)
 
595
        #self.log_message("Wrap mode: " + self.log_wrap)
 
596
    
 
597
    def find_and_remove_client(self, path, name):
 
598
        """Find a client by its object path and remove it.
 
599
        
 
600
        This is connected to the ClientRemoved signal from the
 
601
        Mandos server object."""
 
602
        try:
 
603
            client = self.clients_dict[path]
 
604
        except KeyError:
 
605
            # not found?
 
606
            self.log_message("Unknown client %r (%r) removed", name,
 
607
                             path)
 
608
            return
 
609
        client.delete()
 
610
    
 
611
    def add_new_client(self, path):
 
612
        client_proxy_object = self.bus.get_object(self.busname, path)
 
613
        self.add_client(MandosClientWidget(server_proxy_object
 
614
                                           =self.mandos_serv,
 
615
                                           proxy_object
 
616
                                           =client_proxy_object,
 
617
                                           update_hook
 
618
                                           =self.refresh,
 
619
                                           delete_hook
 
620
                                           =self.remove_client,
 
621
                                           logger
 
622
                                           =self.log_message),
 
623
                        path=path)
 
624
    
 
625
    def add_client(self, client, path=None):
 
626
        self.clients.append(client)
 
627
        if path is None:
 
628
            path = client.proxy.object_path
 
629
        self.clients_dict[path] = client
 
630
        self.clients.sort(None, lambda c: c.properties["Name"])
 
631
        self.refresh()
 
632
    
 
633
    def remove_client(self, client, path=None):
 
634
        self.clients.remove(client)
 
635
        if path is None:
 
636
            path = client.proxy.object_path
 
637
        del self.clients_dict[path]
 
638
        if not self.clients_dict:
 
639
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
 
640
            # is completely emptied, we need to recreate it.
 
641
            self.clients = urwid.SimpleListWalker([])
 
642
            self.rebuild()
 
643
        self.refresh()
 
644
    
 
645
    def refresh(self):
 
646
        """Redraw the screen"""
 
647
        canvas = self.topwidget.render(self.size, focus=True)
 
648
        self.screen.draw_screen(self.size, canvas)
 
649
    
 
650
    def run(self):
 
651
        """Start the main loop and exit when it's done."""
 
652
        self.refresh()
 
653
        self._input_callback_tag = (gobject.io_add_watch
 
654
                                    (sys.stdin.fileno(),
 
655
                                     gobject.IO_IN,
 
656
                                     self.process_input))
 
657
        self.main_loop.run()
 
658
        # Main loop has finished, we should close everything now
 
659
        gobject.source_remove(self._input_callback_tag)
 
660
        self.screen.stop()
 
661
    
 
662
    def stop(self):
 
663
        self.main_loop.quit()
 
664
    
 
665
    def process_input(self, source, condition):
 
666
        keys = self.screen.get_input()
 
667
        translations = { "ctrl n": "down",      # Emacs
 
668
                         "ctrl p": "up",        # Emacs
 
669
                         "ctrl v": "page down", # Emacs
 
670
                         "meta v": "page up",   # Emacs
 
671
                         " ": "page down",      # less
 
672
                         "f": "page down",      # less
 
673
                         "b": "page up",        # less
 
674
                         "j": "down",           # vi
 
675
                         "k": "up",             # vi
 
676
                         }
 
677
        for key in keys:
 
678
            try:
 
679
                key = translations[key]
 
680
            except KeyError:    # :-)
 
681
                pass
 
682
            
 
683
            if key == "q" or key == "Q":
 
684
                self.stop()
 
685
                break
 
686
            elif key == "window resize":
 
687
                self.size = self.screen.get_cols_rows()
 
688
                self.refresh()
 
689
            elif key == "\f":  # Ctrl-L
 
690
                self.refresh()
 
691
            elif key == "l" or key == "D":
 
692
                self.toggle_log_display()
 
693
                self.refresh()
 
694
            elif key == "w" or key == "i":
 
695
                self.change_log_display()
 
696
                self.refresh()
 
697
            elif key == "?" or key == "f1" or key == "esc":
 
698
                if not self.log_visible:
 
699
                    self.log_visible = True
 
700
                    self.rebuild()
 
701
                self.log_message_raw(("bold",
 
702
                                      "  ".
 
703
                                      join(("q: Quit",
 
704
                                            "?: Help",
 
705
                                            "l: Log window toggle",
 
706
                                            "TAB: Switch window",
 
707
                                            "w: Wrap (log)"))))
 
708
                self.log_message_raw(("bold",
 
709
                                      "  "
 
710
                                      .join(("Clients:",
 
711
                                             "+: Enable",
 
712
                                             "-: Disable",
 
713
                                             "R: Remove",
 
714
                                             "s: Start new checker",
 
715
                                             "S: Stop checker",
 
716
                                             "C: Checker OK",
 
717
                                             "a: Approve",
 
718
                                             "d: Deny"))))
 
719
                self.refresh()
 
720
            elif key == "tab":
 
721
                if self.topwidget.get_focus() is self.logbox:
 
722
                    self.topwidget.set_focus(0)
 
723
                else:
 
724
                    self.topwidget.set_focus(self.logbox)
 
725
                self.refresh()
 
726
            #elif (key == "end" or key == "meta >" or key == "G"
 
727
            #      or key == ">"):
 
728
            #    pass            # xxx end-of-buffer
 
729
            #elif (key == "home" or key == "meta <" or key == "g"
 
730
            #      or key == "<"):
 
731
            #    pass            # xxx beginning-of-buffer
 
732
            #elif key == "ctrl e" or key == "$":
 
733
            #    pass            # xxx move-end-of-line
 
734
            #elif key == "ctrl a" or key == "^":
 
735
            #    pass            # xxx move-beginning-of-line
 
736
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
737
            #    pass            # xxx left
 
738
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
739
            #    pass            # xxx right
 
740
            #elif key == "a":
 
741
            #    pass            # scroll up log
 
742
            #elif key == "z":
 
743
            #    pass            # scroll down log
 
744
            elif self.topwidget.selectable():
 
745
                self.topwidget.keypress(self.size, key)
 
746
                self.refresh()
 
747
        return True
 
748
 
 
749
ui = UserInterface()
 
750
try:
 
751
    ui.run()
 
752
except KeyboardInterrupt:
 
753
    ui.screen.stop()
 
754
except Exception, e:
 
755
    ui.log_message(unicode(e))
 
756
    ui.screen.stop()
 
757
    raise