mdw@git.distorted.org.uk Git - tripe/blob - svc/conntrack.in

   1 #! @PYTHON@
   2 ### -*-python-*-
   3 ###
   4 ### Service for automatically tracking network connection status
   5 ###
   6 ### (c) 2010 Straylight/Edgeware
   7 ###
   8
   9 ###----- Licensing notice ---------------------------------------------------
  10 ###
  11 ### This file is part of Trivial IP Encryption (TrIPE).
  12 ###
  13 ### TrIPE is free software: you can redistribute it and/or modify it under
  14 ### the terms of the GNU General Public License as published by the Free
  15 ### Software Foundation; either version 3 of the License, or (at your
  16 ### option) any later version.
  17 ###
  18 ### TrIPE is distributed in the hope that it will be useful, but WITHOUT
  19 ### ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  20 ### FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  21 ### for more details.
  22 ###
  23 ### You should have received a copy of the GNU General Public License
  24 ### along with TrIPE.  If not, see <https://www.gnu.org/licenses/>.
  25
  26 VERSION = '@VERSION@'
  27
  28 ###--------------------------------------------------------------------------
  29 ### External dependencies.
  30
  31 from ConfigParser import RawConfigParser
  32 from optparse import OptionParser
  33 import os as OS
  34 import sys as SYS
  35 import socket as S
  36 import mLib as M
  37 import tripe as T
  38 import dbus as D
  39 import re as RX
  40 for i in ['mainloop', 'mainloop.glib']:
  41   __import__('dbus.%s' % i)
  42 try: from gi.repository import GLib as G
  43 except ImportError: import gobject as G
  44 from struct import pack, unpack
  45
  46 SM = T.svcmgr
  47 ##__import__('rmcr').__debug = True
  48
  49 ###--------------------------------------------------------------------------
  50 ### Utilities.
  51
  52 class struct (object):
  53   """A simple container object."""
  54   def __init__(me, **kw):
  55     me.__dict__.update(kw)
  56
  57 ###--------------------------------------------------------------------------
  58 ### Address manipulation.
  59
  60 class InetAddress (object):
  61   def __init__(me, addrstr, maskstr = None):
  62     me.addr = me._addrstr_to_int(addrstr)
  63     if maskstr is None:
  64       me.mask = -1
  65     elif maskstr.isdigit():
  66       me.mask = (1 << 32) - (1 << 32 - int(maskstr))
  67     else:
  68       me.mask = me._addrstr_to_int(maskstr)
  69     if me.addr&~me.mask:
  70       raise ValueError('network contains bits set beyond mask')
  71   def _addrstr_to_int(me, addrstr):
  72     return unpack('>L', S.inet_aton(addrstr))[0]
  73   def _int_to_addrstr(me, n):
  74     return S.inet_ntoa(pack('>L', n))
  75   def sockaddr(me, port = 0):
  76     if me.mask != -1: raise ValueError('not a simple address')
  77     return me._int_to_addrstr(me.addr), port
  78   def __str__(me):
  79     addrstr = me._int_to_addrstr(me.addr)
  80     if me.mask == -1:
  81       return addrstr
  82     else:
  83       inv = me.mask ^ ((1 << 32) - 1)
  84       if (inv&(inv + 1)) == 0:
  85         return '%s/%d' % (addrstr, 32 - inv.bit_length())
  86       else:
  87         return '%s/%s' % (addrstr, me._int_to_addrstr(me.mask))
  88   def withinp(me, net):
  89     if (me.mask&net.mask) != net.mask: return False
  90     if (me.addr ^ net.addr)&net.mask: return False
  91     return True
  92   def eq(me, other):
  93     if me.mask != other.mask: return False
  94     if me.addr != other.addr: return False
  95     return True
  96   @classmethod
  97   def from_sockaddr(cls, sa):
  98     addr, port = (lambda a, p: (a, p))(*sa)
  99     return cls(addr), port
 100
 101 def parse_address(addrstr, maskstr = None):
 102   return InetAddress(addrstr, maskstr)
 103
 104 def parse_net(netstr):
 105   try: sl = netstr.index('/')
 106   except ValueError: raise ValueError('missing mask')
 107   return parse_address(netstr[:sl], netstr[sl + 1:])
 108
 109 def straddr(a): return a is None and '#<none>' or str(a)
 110
 111 ###--------------------------------------------------------------------------
 112 ### Parse the configuration file.
 113
 114 ## Hmm.  Should I try to integrate this with the peers database?  It's not a
 115 ## good fit; it'd need special hacks in tripe-newpeers.  And the use case for
 116 ## this service are largely going to be satellite notes, I don't think
 117 ## scalability's going to be a problem.
 118
 119 TESTADDR = InetAddress('1.2.3.4')
 120
 121 CONFSYNTAX = [
 122   ('COMMENT', RX.compile(r'^\s*($|[;#])')),
 123   ('GRPHDR', RX.compile(r'^\s*\[(.*)\]\s*$')),
 124   ('ASSGN', RX.compile(r'\s*([\w.-]+)\s*[:=]\s*(|\S|\S.*\S)\s*$'))]
 125
 126 class ConfigError (Exception):
 127   def __init__(me, file, lno, msg):
 128     me.file = file
 129     me.lno = lno
 130     me.msg = msg
 131   def __str__(me):
 132     return '%s:%d: %s' % (me.file, me.lno, me.msg)
 133
 134 class Config (object):
 135   """
 136   Represents a configuration file.
 137
 138   The most interesting thing is probably the `groups' slot, which stores a
 139   list of pairs (NAME, PATTERNS); the NAME is a string, and the PATTERNS a
 140   list of (TAG, PEER, NET) triples.  The implication is that there should be
 141   precisely one peer from the set, and that it should be named TAG, where
 142   (TAG, PEER, NET) is the first triple such that the host's primary IP
 143   address (if PEER is None -- or the IP address it would use for
 144   communicating with PEER) is within the NET.
 145   """
 146
 147   def __init__(me, file):
 148     """
 149     Construct a new Config object, reading the given FILE.
 150     """
 151     me._file = file
 152     me._fwatch = M.FWatch(file)
 153     me._update()
 154
 155   def check(me):
 156     """
 157     See whether the configuration file has been updated.
 158     """
 159     if me._fwatch.update():
 160       me._update()
 161
 162   def _update(me):
 163     """
 164     Internal function to update the configuration from the underlying file.
 165     """
 166
 167     if T._debug: print '# reread config'
 168
 169     ## Initial state.
 170     testaddr = None
 171     groups = {}
 172     grpname = None
 173     grplist = []
 174
 175     ## Open the file and start reading.
 176     with open(me._file) as f:
 177       lno = 0
 178       for line in f:
 179         lno += 1
 180         for tag, rx in CONFSYNTAX:
 181           m = rx.match(line)
 182           if m: break
 183         else:
 184           raise ConfigError(me._file, lno, 'failed to parse line: %r' % line)
 185
 186         if tag == 'COMMENT':
 187           ## A comment.  Ignore it and hope it goes away.
 188
 189           continue
 190
 191         elif tag == 'GRPHDR':
 192           ## A group header.  Flush the old group and start a new one.
 193           newname = m.group(1)
 194
 195           if grpname is not None: groups[grpname] = grplist
 196           if newname in groups:
 197             raise ConfigError(me._file, lno,
 198                               "duplicate group name `%s'" % newname)
 199           grpname = newname
 200           grplist = []
 201
 202         elif tag == 'ASSGN':
 203            ## An assignment.  Deal with it.
 204           name, value = m.group(1), m.group(2)
 205
 206           if grpname is None:
 207             ## We're outside of any group, so this is a global configuration
 208             ## tweak.
 209
 210             if name == 'test-addr':
 211               for astr in value.split():
 212                 try:
 213                   a = parse_address(astr)
 214                 except Exception, e:
 215                   raise ConfigError(me._file, lno,
 216                                     "invalid IP address `%s': %s" %
 217                                     (astr, e))
 218                 if testaddr is not None:
 219                   raise ConfigError(me._file, lno, 'duplicate test-address')
 220                 testaddr = a
 221             else:
 222               raise ConfigError(me._file, lno,
 223                                 "unknown global option `%s'" % name)
 224
 225           else:
 226             ## Parse a pattern and add it to the group.
 227             spec = value.split()
 228             i = 0
 229
 230             ## Check for an explicit target address.
 231             if i >= len(spec) or spec[i].find('/') >= 0:
 232               peer = None
 233             else:
 234               try:
 235                 peer = parse_address(spec[i])
 236               except Exception, e:
 237                 raise ConfigError(me._file, lno,
 238                                   "invalid IP address `%s': %s" %
 239                                   (spec[i], e))
 240               i += 1
 241
 242             ## Parse the local network.
 243             if len(spec) != i + 1:
 244               raise ConfigError(me._file, lno, 'no network defined')
 245             try:
 246               net = parse_net(spec[i])
 247             except Exception, e:
 248               raise ConfigError(me._file, lno,
 249                                 "invalid IP network `%s': %s" %
 250                                 (spec[i], e))
 251
 252             ## Add this entry to the list.
 253             grplist.append((name, peer, net))
 254
 255     ## Fill in the default test address if necessary.
 256     if testaddr is None: testaddr = TESTADDR
 257
 258     ## Done.
 259     if grpname is not None: groups[grpname] = grplist
 260     me.testaddr = testaddr
 261     me.groups = groups
 262
 263 ### This will be a configuration file.
 264 CF = None
 265
 266 def cmd_showconfig():
 267   T.svcinfo('test-addr=%s' % CF.testaddr)
 268 def cmd_showgroups():
 269   for g in sorted(CF.groups.iterkeys()):
 270     T.svcinfo(g)
 271 def cmd_showgroup(g):
 272   try: pats = CF.groups[g]
 273   except KeyError: raise T.TripeJobError('unknown-group', g)
 274   for t, p, n in pats:
 275     T.svcinfo('peer', t,
 276               'target', p and str(p) or '(default)',
 277               'net', str(n))
 278
 279 ###--------------------------------------------------------------------------
 280 ### Responding to a network up/down event.
 281
 282 def localaddr(peer):
 283   """
 284   Return the local IP address used for talking to PEER.
 285   """
 286   sk = S.socket(S.AF_INET, S.SOCK_DGRAM)
 287   try:
 288     try:
 289       sk.connect(peer.sockaddr(1))
 290       addr = sk.getsockname()
 291       return InetAddress.from_sockaddr(addr)[0]
 292     except S.error:
 293       return None
 294   finally:
 295     sk.close()
 296
 297 _kick = T.Queue()
 298 _delay = None
 299
 300 def cancel_delay():
 301   global _delay
 302   if _delay is not None:
 303     if T._debug: print '# cancel delayed kick'
 304     G.source_remove(_delay)
 305     _delay = None
 306
 307 def netupdown(upness, reason):
 308   """
 309   Add or kill peers according to whether the network is up or down.
 310
 311   UPNESS is true if the network is up, or false if it's down.
 312   """
 313
 314   _kick.put((upness, reason))
 315
 316 def delay_netupdown(upness, reason):
 317   global _delay
 318   cancel_delay()
 319   def _func():
 320     global _delay
 321     if T._debug: print '# delayed %s: %s' % (upness, reason)
 322     _delay = None
 323     netupdown(upness, reason)
 324     return False
 325   if T._debug: print '# delaying %s: %s' % (upness, reason)
 326   _delay = G.timeout_add(2000, _func)
 327
 328 def kickpeers():
 329   while True:
 330     upness, reason = _kick.get()
 331     if T._debug: print '# kickpeers %s: %s' % (upness, reason)
 332     select = []
 333     cancel_delay()
 334
 335     ## Make sure the configuration file is up-to-date.  Don't worry if we
 336     ## can't do anything useful.
 337     try:
 338       CF.check()
 339     except Exception, exc:
 340       SM.warn('conntrack', 'config-file-error',
 341               exc.__class__.__name__, str(exc))
 342
 343     ## Find the current list of peers.
 344     peers = SM.list()
 345
 346     ## Work out the primary IP address.
 347     if upness:
 348       addr = localaddr(CF.testaddr)
 349       if addr is None:
 350         upness = False
 351     else:
 352       addr = None
 353     if not T._debug: pass
 354     elif addr: print '#   local address = %s' % straddr(addr)
 355     else: print '#   offline'
 356
 357     ## Now decide what to do.
 358     changes = []
 359     for g, pp in CF.groups.iteritems():
 360       if T._debug: print '#   check group %s' % g
 361
 362       ## Find out which peer in the group ought to be active.
 363       statemap = {}
 364       want = None
 365       matchp = False
 366       for t, p, n in pp:
 367         if p is None or not upness: ip = addr
 368         else: ip = localaddr(p)
 369         if T._debug:
 370           info = 'peer=%s; target=%s; net=%s; local=%s' % (
 371             t, p or '(default)', n, straddr(ip))
 372         if upness and not matchp and \
 373               ip is not None and ip.withinp(n):
 374           if T._debug: print '#     %s: SELECTED' % info
 375           statemap[t] = 'up'
 376           select.append('%s=%s' % (g, t))
 377           if t == 'down' or t.startswith('down/'): want = None
 378           else: want = t
 379           matchp = True
 380         else:
 381           statemap[t] = 'down'
 382           if T._debug: print '#     %s: skipped' % info
 383
 384       ## Shut down the wrong ones.
 385       found = False
 386       if T._debug: print '#   peer-map = %r' % statemap
 387       for p in peers:
 388         what = statemap.get(p, 'leave')
 389         if what == 'up':
 390           found = True
 391           if T._debug: print '#   peer %s: already up' % p
 392         elif what == 'down':
 393           def _(p = p):
 394             try:
 395               SM.kill(p)
 396             except T.TripeError, exc:
 397               if exc.args[0] == 'unknown-peer':
 398                 ## Inherently racy; don't worry about this.
 399                 pass
 400               else:
 401                 raise
 402           if T._debug: print '#   peer %s: bring down' % p
 403           changes.append(_)
 404
 405       ## Start the right one if necessary.
 406       if want is not None and not found:
 407         def _(want = want):
 408           try:
 409             list(SM.svcsubmit('connect', 'active', want))
 410           except T.TripeError, exc:
 411             SM.warn('conntrack', 'connect-failed', want, *exc.args)
 412         if T._debug: print '#   peer %s: bring up' % want
 413         changes.append(_)
 414
 415     ## Commit the changes.
 416     if changes:
 417       SM.notify('conntrack', upness and 'up' or 'down', *select + reason)
 418       for c in changes: c()
 419
 420 ###--------------------------------------------------------------------------
 421 ### NetworkManager monitor.
 422
 423 DBPROPS_IFACE = 'org.freedesktop.DBus.Properties'
 424
 425 NM_NAME = 'org.freedesktop.NetworkManager'
 426 NM_PATH = '/org/freedesktop/NetworkManager'
 427 NM_IFACE = NM_NAME
 428 NMCA_IFACE = NM_NAME + '.Connection.Active'
 429
 430 NM_STATE_CONNECTED = 3 #obsolete
 431 NM_STATE_CONNECTED_LOCAL = 50
 432 NM_STATE_CONNECTED_SITE = 60
 433 NM_STATE_CONNECTED_GLOBAL = 70
 434 NM_CONNSTATES = set([NM_STATE_CONNECTED,
 435                      NM_STATE_CONNECTED_LOCAL,
 436                      NM_STATE_CONNECTED_SITE,
 437                      NM_STATE_CONNECTED_GLOBAL])
 438
 439 class NetworkManagerMonitor (object):
 440   """
 441   Watch NetworkManager signals for changes in network state.
 442   """
 443
 444   ## Strategy.  There are two kinds of interesting state transitions for us.
 445   ## The first one is the global are-we-connected state, which we'll use to
 446   ## toggle network upness on a global level.  The second is which connection
 447   ## has the default route, which we'll use to tweak which peer in the peer
 448   ## group is active.  The former is most easily tracked using the signal
 449   ## org.freedesktop.NetworkManager.StateChanged; for the latter, we track
 450   ## org.freedesktop.NetworkManager.Connection.Active.PropertiesChanged and
 451   ## look for when a new connection gains the default route.
 452
 453   def attach(me, bus):
 454     try:
 455       nm = bus.get_object(NM_NAME, NM_PATH)
 456       state = nm.Get(NM_IFACE, 'State', dbus_interface = DBPROPS_IFACE)
 457       if state in NM_CONNSTATES:
 458         netupdown(True, ['nm', 'initially-connected'])
 459       else:
 460         netupdown(False, ['nm', 'initially-disconnected'])
 461     except D.DBusException, e:
 462       if T._debug: print '# exception attaching to network-manager: %s' % e
 463     bus.add_signal_receiver(me._nm_state, 'StateChanged',
 464                             NM_IFACE, NM_NAME, NM_PATH)
 465     bus.add_signal_receiver(me._nm_connchange, 'PropertiesChanged',
 466                             NMCA_IFACE, NM_NAME, None)
 467
 468   def _nm_state(me, state):
 469     if state in NM_CONNSTATES:
 470       delay_netupdown(True, ['nm', 'connected'])
 471     else:
 472       delay_netupdown(False, ['nm', 'disconnected'])
 473
 474   def _nm_connchange(me, props):
 475     if props.get('Default', False) or props.get('Default6', False):
 476       delay_netupdown(True, ['nm', 'default-connection-change'])
 477
 478 ##--------------------------------------------------------------------------
 479 ### Connman monitor.
 480
 481 CM_NAME = 'net.connman'
 482 CM_PATH = '/'
 483 CM_IFACE = 'net.connman.Manager'
 484
 485 class ConnManMonitor (object):
 486   """
 487   Watch ConnMan signls for changes in network state.
 488   """
 489
 490   ## Strategy.  Everything seems to be usefully encoded in the `State'
 491   ## property.  If it's `offline', `idle' or `ready' then we don't expect a
 492   ## network connection.  During handover from one network to another, the
 493   ## property passes through `ready' to `online'.
 494
 495   def attach(me, bus):
 496     try:
 497       cm = bus.get_object(CM_NAME, CM_PATH)
 498       props = cm.GetProperties(dbus_interface = CM_IFACE)
 499       state = props['State']
 500       netupdown(state == 'online', ['connman', 'initially-%s' % state])
 501     except D.DBusException, e:
 502       if T._debug: print '# exception attaching to connman: %s' % e
 503     bus.add_signal_receiver(me._cm_state, 'PropertyChanged',
 504                             CM_IFACE, CM_NAME, CM_PATH)
 505
 506   def _cm_state(me, prop, value):
 507     if prop != 'State': return
 508     delay_netupdown(value == 'online', ['connman', value])
 509
 510 ###--------------------------------------------------------------------------
 511 ### Maemo monitor.
 512
 513 ICD_NAME = 'com.nokia.icd'
 514 ICD_PATH = '/com/nokia/icd'
 515 ICD_IFACE = ICD_NAME
 516
 517 class MaemoICdMonitor (object):
 518   """
 519   Watch ICd signals for changes in network state.
 520   """
 521
 522   ## Strategy.  ICd only handles one connection at a time in steady state,
 523   ## though when switching between connections, it tries to bring the new one
 524   ## up before shutting down the old one.  This makes life a bit easier than
 525   ## it is with NetworkManager.  On the other hand, the notifications are
 526   ## relative to particular connections only, and the indicator that the old
 527   ## connection is down (`IDLE') comes /after/ the new one comes up
 528   ## (`CONNECTED'), so we have to remember which one is active.
 529
 530   def attach(me, bus):
 531     try:
 532       icd = bus.get_object(ICD_NAME, ICD_PATH)
 533       try:
 534         iap = icd.get_ipinfo(dbus_interface = ICD_IFACE)[0]
 535         me._iap = iap
 536         netupdown(True, ['icd', 'initially-connected', iap])
 537       except D.DBusException:
 538         me._iap = None
 539         netupdown(False, ['icd', 'initially-disconnected'])
 540     except D.DBusException, e:
 541       if T._debug: print '# exception attaching to icd: %s' % e
 542       me._iap = None
 543     bus.add_signal_receiver(me._icd_state, 'status_changed', ICD_IFACE,
 544                             ICD_NAME, ICD_PATH)
 545
 546   def _icd_state(me, iap, ty, state, hunoz):
 547     if state == 'CONNECTED':
 548       me._iap = iap
 549       delay_netupdown(True, ['icd', 'connected', iap])
 550     elif state == 'IDLE' and iap == me._iap:
 551       me._iap = None
 552       delay_netupdown(False, ['icd', 'idle'])
 553
 554 ###--------------------------------------------------------------------------
 555 ### D-Bus connection tracking.
 556
 557 class DBusMonitor (object):
 558   """
 559   Maintains a connection to the system D-Bus, and watches for signals.
 560
 561   If the connection is initially down, or drops for some reason, we retry
 562   periodically (every five seconds at the moment).  If the connection
 563   resurfaces, we reattach the monitors.
 564   """
 565
 566   def __init__(me):
 567     """
 568     Initialise the object and try to establish a connection to the bus.
 569     """
 570     me._mons = []
 571     me._loop = D.mainloop.glib.DBusGMainLoop()
 572     me._state = 'startup'
 573     me._reconnect()
 574
 575   def addmon(me, mon):
 576     """
 577     Add a monitor object to watch for signals.
 578
 579     MON.attach(BUS) is called, with BUS being the connection to the system
 580     bus.  MON should query its service's current status and watch for
 581     relevant signals.
 582     """
 583     me._mons.append(mon)
 584     if me._bus is not None:
 585       mon.attach(me._bus)
 586
 587   def _reconnect(me, hunoz = None):
 588     """
 589     Start connecting to the bus.
 590
 591     If we fail the first time, retry periodically.
 592     """
 593     if me._state == 'startup':
 594       T.aside(SM.notify, 'conntrack', 'dbus-connection', 'startup')
 595     elif me._state == 'connected':
 596       T.aside(SM.notify, 'conntrack', 'dbus-connection', 'lost')
 597     else:
 598       T.aside(SM.notify, 'conntrack', 'dbus-connection',
 599               'state=%s' % me._state)
 600     me._state == 'reconnecting'
 601     me._bus = None
 602     if me._try_connect():
 603       G.timeout_add_seconds(5, me._try_connect)
 604
 605   def _try_connect(me):
 606     """
 607     Actually make a connection attempt.
 608
 609     If we succeed, attach the monitors.
 610     """
 611     try:
 612       addr = OS.getenv('TRIPE_CONNTRACK_BUS')
 613       if addr == 'SESSION':
 614         bus = D.SessionBus(mainloop = me._loop, private = True)
 615       elif addr is not None:
 616         bus = D.bus.BusConnection(addr, mainloop = me._loop)
 617       else:
 618         bus = D.SystemBus(mainloop = me._loop, private = True)
 619       for m in me._mons:
 620         m.attach(bus)
 621     except D.DBusException, e:
 622       return True
 623     me._bus = bus
 624     me._state = 'connected'
 625     bus.call_on_disconnection(me._reconnect)
 626     T.aside(SM.notify, 'conntrack', 'dbus-connection', 'connected')
 627     return False
 628
 629 ###--------------------------------------------------------------------------
 630 ### TrIPE service.
 631
 632 class GIOWatcher (object):
 633   """
 634   Monitor I/O events using glib.
 635   """
 636   def __init__(me, conn, mc = G.main_context_default()):
 637     me._conn = conn
 638     me._watch = None
 639     me._mc = mc
 640   def connected(me, sock):
 641     me._watch = G.io_add_watch(sock, G.IO_IN,
 642                                lambda *hunoz: me._conn.receive())
 643   def disconnected(me):
 644     G.source_remove(me._watch)
 645     me._watch = None
 646   def iterate(me):
 647     me._mc.iteration(True)
 648
 649 SM.iowatch = GIOWatcher(SM)
 650
 651 def init():
 652   """
 653   Service initialization.
 654
 655   Add the D-Bus monitor here, because we might send commands off immediately,
 656   and we want to make sure the server connection is up.
 657   """
 658   global DBM
 659   T.Coroutine(kickpeers, name = 'kickpeers').switch()
 660   DBM = DBusMonitor()
 661   DBM.addmon(NetworkManagerMonitor())
 662   DBM.addmon(ConnManMonitor())
 663   DBM.addmon(MaemoICdMonitor())
 664   G.timeout_add_seconds(30, lambda: (_delay is not None or
 665                                      netupdown(True, ['interval-timer']) or
 666                                      True))
 667
 668 def parse_options():
 669   """
 670   Parse the command-line options.
 671
 672   Automatically changes directory to the requested configdir, and turns on
 673   debugging.  Returns the options object.
 674   """
 675   op = OptionParser(usage = '%prog [-a FILE] [-d DIR]',
 676                     version = '%%prog %s' % VERSION)
 677
 678   op.add_option('-a', '--admin-socket',
 679                 metavar = 'FILE', dest = 'tripesock', default = T.tripesock,
 680                 help = 'Select socket to connect to [default %default]')
 681   op.add_option('-d', '--directory',
 682                 metavar = 'DIR', dest = 'dir', default = T.configdir,
 683                 help = 'Select current diretory [default %default]')
 684   op.add_option('-c', '--config',
 685                 metavar = 'FILE', dest = 'conf', default = 'conntrack.conf',
 686                 help = 'Select configuration [default %default]')
 687   op.add_option('--daemon', dest = 'daemon',
 688                 default = False, action = 'store_true',
 689                 help = 'Become a daemon after successful initialization')
 690   op.add_option('--debug', dest = 'debug',
 691                 default = False, action = 'store_true',
 692                 help = 'Emit debugging trace information')
 693   op.add_option('--startup', dest = 'startup',
 694                 default = False, action = 'store_true',
 695                 help = 'Being called as part of the server startup')
 696
 697   opts, args = op.parse_args()
 698   if args: op.error('no arguments permitted')
 699   OS.chdir(opts.dir)
 700   T._debug = opts.debug
 701   return opts
 702
 703 ## Service table, for running manually.
 704 def cmd_updown(upness):
 705   return lambda *args: T.defer(netupdown, upness, ['manual'] + list(args))
 706 service_info = [('conntrack', VERSION, {
 707   'up': (0, None, '', cmd_updown(True)),
 708   'down': (0, None, '', cmd_updown(False)),
 709   'show-config': (0, 0, '', cmd_showconfig),
 710   'show-groups': (0, 0, '', cmd_showgroups),
 711   'show-group': (1, 1, 'GROUP', cmd_showgroup)
 712 })]
 713
 714 if __name__ == '__main__':
 715   opts = parse_options()
 716   CF = Config(opts.conf)
 717   T.runservices(opts.tripesock, service_info,
 718                 init = init, daemon = opts.daemon)
 719
 720 ###----- That's all, folks --------------------------------------------------