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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 | ### | |
11ad66c2 MW |
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. | |
2ec90437 | 17 | ### |
11ad66c2 MW |
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. | |
2ec90437 MW |
22 | ### |
23 | ### You should have received a copy of the GNU General Public License | |
11ad66c2 | 24 | ### along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
2ec90437 MW |
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 | for i in ['mainloop', 'mainloop.glib']: | |
40 | __import__('dbus.%s' % i) | |
a69f4417 MW |
41 | try: from gi.repository import GLib as G |
42 | except ImportError: import gobject as G | |
2ec90437 MW |
43 | from struct import pack, unpack |
44 | ||
45 | SM = T.svcmgr | |
46 | ##__import__('rmcr').__debug = True | |
47 | ||
48 | ###-------------------------------------------------------------------------- | |
49 | ### Utilities. | |
50 | ||
51 | class struct (object): | |
52 | """A simple container object.""" | |
53 | def __init__(me, **kw): | |
54 | me.__dict__.update(kw) | |
55 | ||
56 | def toposort(cmp, things): | |
57 | """ | |
58 | Generate the THINGS in an order consistent with a given partial order. | |
59 | ||
60 | The function CMP(X, Y) should return true if X must precede Y, and false if | |
61 | it doesn't care. If X and Y are equal then it should return false. | |
62 | ||
63 | The THINGS may be any finite iterable; it is converted to a list | |
64 | internally. | |
65 | """ | |
66 | ||
67 | ## Make sure we can index the THINGS, and prepare an ordering table. | |
68 | ## What's going on? The THINGS might not have a helpful equality | |
69 | ## predicate, so it's easier to work with indices. The ordering table will | |
70 | ## remember which THINGS (by index) are considered greater than other | |
71 | ## things. | |
72 | things = list(things) | |
73 | n = len(things) | |
74 | order = [{} for i in xrange(n)] | |
75 | rorder = [{} for i in xrange(n)] | |
76 | for i in xrange(n): | |
77 | for j in xrange(n): | |
78 | if i != j and cmp(things[i], things[j]): | |
79 | order[j][i] = True | |
80 | rorder[i][j] = True | |
81 | ||
82 | ## Now we can do the sort. | |
83 | out = [] | |
84 | while True: | |
85 | done = True | |
86 | for i in xrange(n): | |
87 | if order[i] is not None: | |
88 | done = False | |
89 | if len(order[i]) == 0: | |
90 | for j in rorder[i]: | |
91 | del order[j][i] | |
92 | yield things[i] | |
93 | order[i] = None | |
94 | if done: | |
95 | break | |
96 | ||
6e8bbeeb MW |
97 | ###-------------------------------------------------------------------------- |
98 | ### Address manipulation. | |
99 | ||
6aa21132 MW |
100 | class InetAddress (object): |
101 | def __init__(me, addrstr, maskstr = None): | |
102 | me.addr = me._addrstr_to_int(addrstr) | |
103 | if maskstr is None: | |
104 | me.mask = -1 | |
105 | elif maskstr.isdigit(): | |
106 | me.mask = (1 << 32) - (1 << 32 - int(maskstr)) | |
107 | else: | |
108 | me.mask = me._addrstr_to_int(maskstr) | |
109 | if me.addr&~me.mask: | |
110 | raise ValueError('network contains bits set beyond mask') | |
111 | def _addrstr_to_int(me, addrstr): | |
112 | return unpack('>L', S.inet_aton(addrstr))[0] | |
113 | def _int_to_addrstr(me, n): | |
114 | return S.inet_ntoa(pack('>L', n)) | |
115 | def sockaddr(me, port = 0): | |
116 | if me.mask != -1: raise ValueError('not a simple address') | |
117 | return me._int_to_addrstr(me.addr), port | |
118 | def __str__(me): | |
119 | addrstr = me._int_to_addrstr(me.addr) | |
120 | if me.mask == -1: | |
121 | return addrstr | |
122 | else: | |
123 | inv = me.mask ^ ((1 << 32) - 1) | |
124 | if (inv&(inv + 1)) == 0: | |
125 | return '%s/%d' % (addrstr, 32 - inv.bit_length()) | |
126 | else: | |
127 | return '%s/%s' % (addrstr, me._int_to_addrstr(me.mask)) | |
128 | def withinp(me, net): | |
129 | if (me.mask&net.mask) != net.mask: return False | |
130 | if (me.addr ^ net.addr)&net.mask: return False | |
131 | return True | |
132 | def eq(me, other): | |
133 | if me.mask != other.mask: return False | |
134 | if me.addr != other.addr: return False | |
135 | return True | |
136 | @classmethod | |
137 | def from_sockaddr(cls, sa): | |
138 | addr, port = (lambda a, p: (a, p))(*sa) | |
139 | return cls(addr), port | |
140 | ||
141 | def parse_address(addrstr, maskstr = None): | |
142 | return InetAddress(addrstr, maskstr) | |
11ab0da6 | 143 | |
69bdcb64 MW |
144 | def parse_net(netstr): |
145 | try: sl = netstr.index('/') | |
146 | except ValueError: raise ValueError('missing mask') | |
6aa21132 | 147 | return parse_address(netstr[:sl], netstr[sl + 1:]) |
69bdcb64 | 148 | |
6aa21132 | 149 | def straddr(a): return a is None and '#<none>' or str(a) |
6e8bbeeb | 150 | |
2ec90437 MW |
151 | ###-------------------------------------------------------------------------- |
152 | ### Parse the configuration file. | |
153 | ||
154 | ## Hmm. Should I try to integrate this with the peers database? It's not a | |
155 | ## good fit; it'd need special hacks in tripe-newpeers. And the use case for | |
156 | ## this service are largely going to be satellite notes, I don't think | |
157 | ## scalability's going to be a problem. | |
158 | ||
6aa21132 MW |
159 | TESTADDR = InetAddress('1.2.3.4') |
160 | ||
2ec90437 MW |
161 | class Config (object): |
162 | """ | |
163 | Represents a configuration file. | |
164 | ||
165 | The most interesting thing is probably the `groups' slot, which stores a | |
166 | list of pairs (NAME, PATTERNS); the NAME is a string, and the PATTERNS a | |
6aa21132 MW |
167 | list of (TAG, PEER, NET) triples. The implication is that there should be |
168 | precisely one peer from the set, and that it should be named TAG, where | |
169 | (TAG, PEER, NET) is the first triple such that the host's primary IP | |
170 | address (if PEER is None -- or the IP address it would use for | |
171 | communicating with PEER) is within the NET. | |
2ec90437 MW |
172 | """ |
173 | ||
174 | def __init__(me, file): | |
175 | """ | |
176 | Construct a new Config object, reading the given FILE. | |
177 | """ | |
178 | me._file = file | |
179 | me._fwatch = M.FWatch(file) | |
180 | me._update() | |
181 | ||
182 | def check(me): | |
183 | """ | |
184 | See whether the configuration file has been updated. | |
185 | """ | |
186 | if me._fwatch.update(): | |
187 | me._update() | |
188 | ||
189 | def _update(me): | |
190 | """ | |
191 | Internal function to update the configuration from the underlying file. | |
192 | """ | |
193 | ||
194 | ## Read the configuration. We have no need of the fancy substitutions, | |
195 | ## so turn them all off. | |
196 | cp = RawConfigParser() | |
197 | cp.read(me._file) | |
2d4998c4 | 198 | if T._debug: print '# reread config' |
2ec90437 MW |
199 | |
200 | ## Save the test address. Make sure it's vaguely sensible. The default | |
201 | ## is probably good for most cases, in fact, since that address isn't | |
202 | ## actually in use. Note that we never send packets to the test address; | |
203 | ## we just use it to discover routing information. | |
204 | if cp.has_option('DEFAULT', 'test-addr'): | |
6aa21132 | 205 | testaddr = InetAddress(cp.get('DEFAULT', 'test-addr')) |
2ec90437 | 206 | else: |
6aa21132 | 207 | testaddr = TESTADDR |
2ec90437 MW |
208 | |
209 | ## Scan the configuration file and build the groups structure. | |
f8d6fc7b | 210 | groups = {} |
2ec90437 MW |
211 | for sec in cp.sections(): |
212 | pats = [] | |
213 | for tag in cp.options(sec): | |
214 | spec = cp.get(sec, tag).split() | |
215 | ||
216 | ## Parse the entry into peer and network. | |
217 | if len(spec) == 1: | |
218 | peer = None | |
219 | net = spec[0] | |
220 | else: | |
6aa21132 MW |
221 | peer = InetAddress(spec[0]) |
222 | net = spec[1] | |
2ec90437 MW |
223 | |
224 | ## Syntax of a net is ADDRESS/MASK, where ADDRESS is a dotted-quad, | |
225 | ## and MASK is either a dotted-quad or a single integer N indicating | |
226 | ## a mask with N leading ones followed by trailing zeroes. | |
6aa21132 MW |
227 | net = parse_net(net) |
228 | pats.append((tag, peer, net)) | |
2ec90437 MW |
229 | |
230 | ## Annoyingly, RawConfigParser doesn't preserve the order of options. | |
231 | ## In order to make things vaguely sane, we topologically sort the | |
232 | ## patterns so that more specific patterns are checked first. | |
6aa21132 | 233 | pats = list(toposort(lambda (t, p, n), (tt, pp, nn): \ |
2ec90437 | 234 | (p and not pp) or \ |
6aa21132 | 235 | (p == pp and n.withinp(nn)), |
2ec90437 | 236 | pats)) |
f8d6fc7b | 237 | groups[sec] = pats |
2ec90437 MW |
238 | |
239 | ## Done. | |
240 | me.testaddr = testaddr | |
241 | me.groups = groups | |
242 | ||
243 | ### This will be a configuration file. | |
244 | CF = None | |
245 | ||
2d4998c4 MW |
246 | def cmd_showconfig(): |
247 | T.svcinfo('test-addr=%s' % CF.testaddr) | |
248 | def cmd_showgroups(): | |
f8d6fc7b MW |
249 | for g in sorted(CF.groups.iterkeys()): |
250 | T.svcinfo(g) | |
2d4998c4 | 251 | def cmd_showgroup(g): |
f8d6fc7b MW |
252 | try: pats = CF.groups[g] |
253 | except KeyError: raise T.TripeJobError('unknown-group', g) | |
6aa21132 | 254 | for t, p, n in pats: |
2d4998c4 | 255 | T.svcinfo('peer', t, |
6aa21132 MW |
256 | 'target', p and str(p) or '(default)', |
257 | 'net', str(n)) | |
2d4998c4 | 258 | |
2ec90437 MW |
259 | ###-------------------------------------------------------------------------- |
260 | ### Responding to a network up/down event. | |
261 | ||
262 | def localaddr(peer): | |
263 | """ | |
264 | Return the local IP address used for talking to PEER. | |
265 | """ | |
266 | sk = S.socket(S.AF_INET, S.SOCK_DGRAM) | |
267 | try: | |
268 | try: | |
6aa21132 MW |
269 | sk.connect(peer.sockaddr(1)) |
270 | addr = sk.getsockname() | |
271 | return InetAddress.from_sockaddr(addr)[0] | |
2ec90437 MW |
272 | except S.error: |
273 | return None | |
274 | finally: | |
275 | sk.close() | |
276 | ||
277 | _kick = T.Queue() | |
f5393555 MW |
278 | _delay = None |
279 | ||
280 | def cancel_delay(): | |
281 | global _delay | |
282 | if _delay is not None: | |
283 | if T._debug: print '# cancel delayed kick' | |
284 | G.source_remove(_delay) | |
285 | _delay = None | |
4f6b41b9 MW |
286 | |
287 | def netupdown(upness, reason): | |
288 | """ | |
289 | Add or kill peers according to whether the network is up or down. | |
290 | ||
291 | UPNESS is true if the network is up, or false if it's down. | |
292 | """ | |
293 | ||
294 | _kick.put((upness, reason)) | |
295 | ||
f5393555 MW |
296 | def delay_netupdown(upness, reason): |
297 | global _delay | |
298 | cancel_delay() | |
299 | def _func(): | |
300 | global _delay | |
301 | if T._debug: print '# delayed %s: %s' % (upness, reason) | |
302 | _delay = None | |
303 | netupdown(upness, reason) | |
304 | return False | |
305 | if T._debug: print '# delaying %s: %s' % (upness, reason) | |
306 | _delay = G.timeout_add(2000, _func) | |
307 | ||
2ec90437 MW |
308 | def kickpeers(): |
309 | while True: | |
310 | upness, reason = _kick.get() | |
2d4998c4 MW |
311 | if T._debug: print '# kickpeers %s: %s' % (upness, reason) |
312 | select = [] | |
f5393555 | 313 | cancel_delay() |
2ec90437 MW |
314 | |
315 | ## Make sure the configuration file is up-to-date. Don't worry if we | |
316 | ## can't do anything useful. | |
317 | try: | |
318 | CF.check() | |
319 | except Exception, exc: | |
320 | SM.warn('conntrack', 'config-file-error', | |
321 | exc.__class__.__name__, str(exc)) | |
322 | ||
323 | ## Find the current list of peers. | |
324 | peers = SM.list() | |
325 | ||
326 | ## Work out the primary IP address. | |
327 | if upness: | |
328 | addr = localaddr(CF.testaddr) | |
329 | if addr is None: | |
330 | upness = False | |
b10a8c3d MW |
331 | else: |
332 | addr = None | |
2d4998c4 MW |
333 | if not T._debug: pass |
334 | elif addr: print '# local address = %s' % straddr(addr) | |
335 | else: print '# offline' | |
2ec90437 MW |
336 | |
337 | ## Now decide what to do. | |
338 | changes = [] | |
f8d6fc7b | 339 | for g, pp in CF.groups.iteritems(): |
2d4998c4 | 340 | if T._debug: print '# check group %s' % g |
2ec90437 MW |
341 | |
342 | ## Find out which peer in the group ought to be active. | |
b10a8c3d MW |
343 | ip = None |
344 | map = {} | |
345 | want = None | |
6aa21132 | 346 | for t, p, n in pp: |
b10a8c3d MW |
347 | if p is None or not upness: |
348 | ipq = addr | |
349 | else: | |
350 | ipq = localaddr(p) | |
2d4998c4 | 351 | if T._debug: |
6aa21132 MW |
352 | info = 'peer=%s; target=%s; net=%s; local=%s' % ( |
353 | t, p or '(default)', n, straddr(ipq)) | |
b10a8c3d | 354 | if upness and ip is None and \ |
6aa21132 | 355 | ipq is not None and ipq.withinp(n): |
2d4998c4 | 356 | if T._debug: print '# %s: SELECTED' % info |
b10a8c3d | 357 | map[t] = 'up' |
2d4998c4 | 358 | select.append('%s=%s' % (g, t)) |
f2bdb96e MW |
359 | if t == 'down' or t.startswith('down/'): |
360 | want = None | |
361 | else: | |
362 | want = t | |
b10a8c3d MW |
363 | ip = ipq |
364 | else: | |
365 | map[t] = 'down' | |
2d4998c4 | 366 | if T._debug: print '# %s: skipped' % info |
2ec90437 MW |
367 | |
368 | ## Shut down the wrong ones. | |
369 | found = False | |
2d4998c4 | 370 | if T._debug: print '# peer-map = %r' % map |
2ec90437 | 371 | for p in peers: |
b10a8c3d MW |
372 | what = map.get(p, 'leave') |
373 | if what == 'up': | |
2ec90437 | 374 | found = True |
2d4998c4 | 375 | if T._debug: print '# peer %s: already up' % p |
b10a8c3d | 376 | elif what == 'down': |
cf2e4ea6 MW |
377 | def _(p = p): |
378 | try: | |
379 | SM.kill(p) | |
380 | except T.TripeError, exc: | |
381 | if exc.args[0] == 'unknown-peer': | |
382 | ## Inherently racy; don't worry about this. | |
383 | pass | |
384 | else: | |
385 | raise | |
2d4998c4 | 386 | if T._debug: print '# peer %s: bring down' % p |
cf2e4ea6 | 387 | changes.append(_) |
2ec90437 MW |
388 | |
389 | ## Start the right one if necessary. | |
7b7e3c74 | 390 | if want is not None and not found: |
cf2e4ea6 MW |
391 | def _(want = want): |
392 | try: | |
8d1d183e | 393 | list(SM.svcsubmit('connect', 'active', want)) |
cf2e4ea6 MW |
394 | except T.TripeError, exc: |
395 | SM.warn('conntrack', 'connect-failed', want, *exc.args) | |
2d4998c4 | 396 | if T._debug: print '# peer %s: bring up' % want |
cf2e4ea6 | 397 | changes.append(_) |
2ec90437 MW |
398 | |
399 | ## Commit the changes. | |
400 | if changes: | |
2d4998c4 | 401 | SM.notify('conntrack', upness and 'up' or 'down', *select + reason) |
2ec90437 MW |
402 | for c in changes: c() |
403 | ||
2ec90437 MW |
404 | ###-------------------------------------------------------------------------- |
405 | ### NetworkManager monitor. | |
406 | ||
498d9f42 MW |
407 | DBPROPS_IFACE = 'org.freedesktop.DBus.Properties' |
408 | ||
2ec90437 MW |
409 | NM_NAME = 'org.freedesktop.NetworkManager' |
410 | NM_PATH = '/org/freedesktop/NetworkManager' | |
411 | NM_IFACE = NM_NAME | |
412 | NMCA_IFACE = NM_NAME + '.Connection.Active' | |
413 | ||
2079efa1 MW |
414 | NM_STATE_CONNECTED = 3 #obsolete |
415 | NM_STATE_CONNECTED_LOCAL = 50 | |
416 | NM_STATE_CONNECTED_SITE = 60 | |
417 | NM_STATE_CONNECTED_GLOBAL = 70 | |
418 | NM_CONNSTATES = set([NM_STATE_CONNECTED, | |
419 | NM_STATE_CONNECTED_LOCAL, | |
420 | NM_STATE_CONNECTED_SITE, | |
421 | NM_STATE_CONNECTED_GLOBAL]) | |
2ec90437 MW |
422 | |
423 | class NetworkManagerMonitor (object): | |
424 | """ | |
425 | Watch NetworkManager signals for changes in network state. | |
426 | """ | |
427 | ||
428 | ## Strategy. There are two kinds of interesting state transitions for us. | |
429 | ## The first one is the global are-we-connected state, which we'll use to | |
430 | ## toggle network upness on a global level. The second is which connection | |
431 | ## has the default route, which we'll use to tweak which peer in the peer | |
432 | ## group is active. The former is most easily tracked using the signal | |
433 | ## org.freedesktop.NetworkManager.StateChanged; for the latter, we track | |
434 | ## org.freedesktop.NetworkManager.Connection.Active.PropertiesChanged and | |
435 | ## look for when a new connection gains the default route. | |
436 | ||
437 | def attach(me, bus): | |
438 | try: | |
439 | nm = bus.get_object(NM_NAME, NM_PATH) | |
498d9f42 | 440 | state = nm.Get(NM_IFACE, 'State', dbus_interface = DBPROPS_IFACE) |
2079efa1 | 441 | if state in NM_CONNSTATES: |
2ec90437 MW |
442 | netupdown(True, ['nm', 'initially-connected']) |
443 | else: | |
444 | netupdown(False, ['nm', 'initially-disconnected']) | |
bd9bd714 MW |
445 | except D.DBusException, e: |
446 | if T._debug: print '# exception attaching to network-manager: %s' % e | |
2079efa1 MW |
447 | bus.add_signal_receiver(me._nm_state, 'StateChanged', |
448 | NM_IFACE, NM_NAME, NM_PATH) | |
449 | bus.add_signal_receiver(me._nm_connchange, 'PropertiesChanged', | |
450 | NMCA_IFACE, NM_NAME, None) | |
2ec90437 MW |
451 | |
452 | def _nm_state(me, state): | |
2079efa1 | 453 | if state in NM_CONNSTATES: |
f5393555 | 454 | delay_netupdown(True, ['nm', 'connected']) |
2ec90437 | 455 | else: |
f5393555 | 456 | delay_netupdown(False, ['nm', 'disconnected']) |
2ec90437 MW |
457 | |
458 | def _nm_connchange(me, props): | |
f5393555 MW |
459 | if props.get('Default', False) or props.get('Default6', False): |
460 | delay_netupdown(True, ['nm', 'default-connection-change']) | |
2ec90437 | 461 | |
a95eb44a MW |
462 | ##-------------------------------------------------------------------------- |
463 | ### Connman monitor. | |
464 | ||
465 | CM_NAME = 'net.connman' | |
466 | CM_PATH = '/' | |
467 | CM_IFACE = 'net.connman.Manager' | |
468 | ||
469 | class ConnManMonitor (object): | |
470 | """ | |
471 | Watch ConnMan signls for changes in network state. | |
472 | """ | |
473 | ||
474 | ## Strategy. Everything seems to be usefully encoded in the `State' | |
475 | ## property. If it's `offline', `idle' or `ready' then we don't expect a | |
476 | ## network connection. During handover from one network to another, the | |
477 | ## property passes through `ready' to `online'. | |
478 | ||
479 | def attach(me, bus): | |
480 | try: | |
481 | cm = bus.get_object(CM_NAME, CM_PATH) | |
482 | props = cm.GetProperties(dbus_interface = CM_IFACE) | |
483 | state = props['State'] | |
484 | netupdown(state == 'online', ['connman', 'initially-%s' % state]) | |
bd9bd714 MW |
485 | except D.DBusException, e: |
486 | if T._debug: print '# exception attaching to connman: %s' % e | |
a95eb44a MW |
487 | bus.add_signal_receiver(me._cm_state, 'PropertyChanged', |
488 | CM_IFACE, CM_NAME, CM_PATH) | |
489 | ||
490 | def _cm_state(me, prop, value): | |
491 | if prop != 'State': return | |
f5393555 | 492 | delay_netupdown(value == 'online', ['connman', value]) |
a95eb44a | 493 | |
2ec90437 MW |
494 | ###-------------------------------------------------------------------------- |
495 | ### Maemo monitor. | |
496 | ||
497 | ICD_NAME = 'com.nokia.icd' | |
498 | ICD_PATH = '/com/nokia/icd' | |
499 | ICD_IFACE = ICD_NAME | |
500 | ||
501 | class MaemoICdMonitor (object): | |
502 | """ | |
503 | Watch ICd signals for changes in network state. | |
504 | """ | |
505 | ||
506 | ## Strategy. ICd only handles one connection at a time in steady state, | |
507 | ## though when switching between connections, it tries to bring the new one | |
508 | ## up before shutting down the old one. This makes life a bit easier than | |
509 | ## it is with NetworkManager. On the other hand, the notifications are | |
510 | ## relative to particular connections only, and the indicator that the old | |
511 | ## connection is down (`IDLE') comes /after/ the new one comes up | |
512 | ## (`CONNECTED'), so we have to remember which one is active. | |
513 | ||
514 | def attach(me, bus): | |
515 | try: | |
516 | icd = bus.get_object(ICD_NAME, ICD_PATH) | |
517 | try: | |
518 | iap = icd.get_ipinfo(dbus_interface = ICD_IFACE)[0] | |
519 | me._iap = iap | |
520 | netupdown(True, ['icd', 'initially-connected', iap]) | |
521 | except D.DBusException: | |
522 | me._iap = None | |
523 | netupdown(False, ['icd', 'initially-disconnected']) | |
bd9bd714 MW |
524 | except D.DBusException, e: |
525 | if T._debug: print '# exception attaching to icd: %s' % e | |
2ec90437 MW |
526 | me._iap = None |
527 | bus.add_signal_receiver(me._icd_state, 'status_changed', ICD_IFACE, | |
528 | ICD_NAME, ICD_PATH) | |
529 | ||
530 | def _icd_state(me, iap, ty, state, hunoz): | |
531 | if state == 'CONNECTED': | |
532 | me._iap = iap | |
f5393555 | 533 | delay_netupdown(True, ['icd', 'connected', iap]) |
2ec90437 MW |
534 | elif state == 'IDLE' and iap == me._iap: |
535 | me._iap = None | |
f5393555 | 536 | delay_netupdown(False, ['icd', 'idle']) |
2ec90437 MW |
537 | |
538 | ###-------------------------------------------------------------------------- | |
539 | ### D-Bus connection tracking. | |
540 | ||
541 | class DBusMonitor (object): | |
542 | """ | |
543 | Maintains a connection to the system D-Bus, and watches for signals. | |
544 | ||
545 | If the connection is initially down, or drops for some reason, we retry | |
546 | periodically (every five seconds at the moment). If the connection | |
547 | resurfaces, we reattach the monitors. | |
548 | """ | |
549 | ||
550 | def __init__(me): | |
551 | """ | |
552 | Initialise the object and try to establish a connection to the bus. | |
553 | """ | |
554 | me._mons = [] | |
555 | me._loop = D.mainloop.glib.DBusGMainLoop() | |
7bfa1e06 | 556 | me._state = 'startup' |
2ec90437 MW |
557 | me._reconnect() |
558 | ||
559 | def addmon(me, mon): | |
560 | """ | |
561 | Add a monitor object to watch for signals. | |
562 | ||
563 | MON.attach(BUS) is called, with BUS being the connection to the system | |
564 | bus. MON should query its service's current status and watch for | |
565 | relevant signals. | |
566 | """ | |
567 | me._mons.append(mon) | |
568 | if me._bus is not None: | |
569 | mon.attach(me._bus) | |
570 | ||
16650038 | 571 | def _reconnect(me, hunoz = None): |
2ec90437 MW |
572 | """ |
573 | Start connecting to the bus. | |
574 | ||
575 | If we fail the first time, retry periodically. | |
576 | """ | |
7bfa1e06 MW |
577 | if me._state == 'startup': |
578 | T.aside(SM.notify, 'conntrack', 'dbus-connection', 'startup') | |
579 | elif me._state == 'connected': | |
580 | T.aside(SM.notify, 'conntrack', 'dbus-connection', 'lost') | |
581 | else: | |
582 | T.aside(SM.notify, 'conntrack', 'dbus-connection', | |
583 | 'state=%s' % me._state) | |
584 | me._state == 'reconnecting' | |
2ec90437 MW |
585 | me._bus = None |
586 | if me._try_connect(): | |
587 | G.timeout_add_seconds(5, me._try_connect) | |
588 | ||
589 | def _try_connect(me): | |
590 | """ | |
591 | Actually make a connection attempt. | |
592 | ||
593 | If we succeed, attach the monitors. | |
594 | """ | |
595 | try: | |
7bfa1e06 MW |
596 | addr = OS.getenv('TRIPE_CONNTRACK_BUS') |
597 | if addr == 'SESSION': | |
598 | bus = D.SessionBus(mainloop = me._loop, private = True) | |
599 | elif addr is not None: | |
600 | bus = D.bus.BusConnection(addr, mainloop = me._loop) | |
601 | else: | |
602 | bus = D.SystemBus(mainloop = me._loop, private = True) | |
603 | for m in me._mons: | |
604 | m.attach(bus) | |
605 | except D.DBusException, e: | |
2ec90437 MW |
606 | return True |
607 | me._bus = bus | |
7bfa1e06 | 608 | me._state = 'connected' |
2ec90437 | 609 | bus.call_on_disconnection(me._reconnect) |
7bfa1e06 | 610 | T.aside(SM.notify, 'conntrack', 'dbus-connection', 'connected') |
2ec90437 MW |
611 | return False |
612 | ||
613 | ###-------------------------------------------------------------------------- | |
614 | ### TrIPE service. | |
615 | ||
616 | class GIOWatcher (object): | |
617 | """ | |
618 | Monitor I/O events using glib. | |
619 | """ | |
620 | def __init__(me, conn, mc = G.main_context_default()): | |
621 | me._conn = conn | |
622 | me._watch = None | |
623 | me._mc = mc | |
624 | def connected(me, sock): | |
625 | me._watch = G.io_add_watch(sock, G.IO_IN, | |
626 | lambda *hunoz: me._conn.receive()) | |
627 | def disconnected(me): | |
628 | G.source_remove(me._watch) | |
629 | me._watch = None | |
630 | def iterate(me): | |
631 | me._mc.iteration(True) | |
632 | ||
633 | SM.iowatch = GIOWatcher(SM) | |
634 | ||
635 | def init(): | |
636 | """ | |
637 | Service initialization. | |
638 | ||
639 | Add the D-Bus monitor here, because we might send commands off immediately, | |
640 | and we want to make sure the server connection is up. | |
641 | """ | |
29807d89 | 642 | global DBM |
22b47552 | 643 | T.Coroutine(kickpeers, name = 'kickpeers').switch() |
29807d89 MW |
644 | DBM = DBusMonitor() |
645 | DBM.addmon(NetworkManagerMonitor()) | |
a95eb44a | 646 | DBM.addmon(ConnManMonitor()) |
29807d89 | 647 | DBM.addmon(MaemoICdMonitor()) |
f5393555 MW |
648 | G.timeout_add_seconds(30, lambda: (_delay is not None or |
649 | netupdown(True, ['interval-timer']) or | |
650 | True)) | |
2ec90437 MW |
651 | |
652 | def parse_options(): | |
653 | """ | |
654 | Parse the command-line options. | |
655 | ||
656 | Automatically changes directory to the requested configdir, and turns on | |
657 | debugging. Returns the options object. | |
658 | """ | |
659 | op = OptionParser(usage = '%prog [-a FILE] [-d DIR]', | |
660 | version = '%%prog %s' % VERSION) | |
661 | ||
662 | op.add_option('-a', '--admin-socket', | |
663 | metavar = 'FILE', dest = 'tripesock', default = T.tripesock, | |
664 | help = 'Select socket to connect to [default %default]') | |
665 | op.add_option('-d', '--directory', | |
666 | metavar = 'DIR', dest = 'dir', default = T.configdir, | |
667 | help = 'Select current diretory [default %default]') | |
668 | op.add_option('-c', '--config', | |
669 | metavar = 'FILE', dest = 'conf', default = 'conntrack.conf', | |
670 | help = 'Select configuration [default %default]') | |
671 | op.add_option('--daemon', dest = 'daemon', | |
672 | default = False, action = 'store_true', | |
673 | help = 'Become a daemon after successful initialization') | |
674 | op.add_option('--debug', dest = 'debug', | |
675 | default = False, action = 'store_true', | |
676 | help = 'Emit debugging trace information') | |
677 | op.add_option('--startup', dest = 'startup', | |
678 | default = False, action = 'store_true', | |
679 | help = 'Being called as part of the server startup') | |
680 | ||
681 | opts, args = op.parse_args() | |
682 | if args: op.error('no arguments permitted') | |
683 | OS.chdir(opts.dir) | |
684 | T._debug = opts.debug | |
685 | return opts | |
686 | ||
687 | ## Service table, for running manually. | |
688 | def cmd_updown(upness): | |
689 | return lambda *args: T.defer(netupdown, upness, ['manual'] + list(args)) | |
690 | service_info = [('conntrack', VERSION, { | |
691 | 'up': (0, None, '', cmd_updown(True)), | |
2d4998c4 MW |
692 | 'down': (0, None, '', cmd_updown(False)), |
693 | 'show-config': (0, 0, '', cmd_showconfig), | |
694 | 'show-groups': (0, 0, '', cmd_showgroups), | |
695 | 'show-group': (1, 1, 'GROUP', cmd_showgroup) | |
2ec90437 MW |
696 | })] |
697 | ||
698 | if __name__ == '__main__': | |
699 | opts = parse_options() | |
700 | CF = Config(opts.conf) | |
701 | T.runservices(opts.tripesock, service_info, | |
702 | init = init, daemon = opts.daemon) | |
703 | ||
704 | ###----- That's all, folks -------------------------------------------------- |