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- Committer: Bazaar Package Importer
- Author(s): Chuck Short
- Date: 2010-05-05 03:06:19 UTC
- mfrom: (10.2.6 sid)
- Revision ID: james.westby@ubuntu.com-20100505030619-cwre0snhgx1mql53
Tags: 2.1.0-2ubuntu1
* Merge from debian unstable. Remaining changes:
+ debian/openvpn.init.d:
- Do not use start-stop-daemon and use </dev/null to avoid blocking boot
- Show per-VPN result messages
- Add "--script-security 2" by default for backwards compatablitiy
+ debian/control: Add lsb-base >= 3.2-14 to allow status_of_proc()
+ debian/openvpn.init.d:
- Do not use start-stop-daemon and use </dev/null to avoid blocking boot
- Show per-VPN result messages
- Add "--script-security 2" by default for backwards compatablitiy
+ debian/control: Add lsb-base >= 3.2-14 to allow status_of_proc()
- files added:
- .pc
- .pc/attemping_typo
- .pc/auth-pam_libpam_so_filename.patch
- .pc/auth-pam_libpam_so_filename.patch/plugin
- .pc/auth-pam_libpam_so_filename.patch/plugin/auth-pam
- .pc/close_socket_before_scripts.patch
- .pc/counter_type_for_bytes.patch
- .pc/debian_nogroup_for_sample_files.patch
- .pc/debian_nogroup_for_sample_files.patch/sample-config-files
- .pc/debian_openssl_vulnkeys.patch
- .pc/eurephia.patch
- .pc/jjo-ipv6-support.patch
- .pc/manpage_dash_escaping.patch
- .pc/openvpn-pkcs11warn.patch
- .pc/route_default_nil.patch
- debian/source
- files modified:
- buffer.c
added
removed
.pc/jjo-ipv6-support.patch/multi.c
1
/*
2
* OpenVPN -- An application to securely tunnel IP networks
3
* over a single TCP/UDP port, with support for SSL/TLS-based
4
* session authentication and key exchange,
5
* packet encryption, packet authentication, and
6
* packet compression.
7
*
8
* Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
9
*
10
* This program is free software; you can redistribute it and/or modify
11
* it under the terms of the GNU General Public License version 2
12
* as published by the Free Software Foundation.
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 (see the file COPYING included with this
21
* distribution); if not, write to the Free Software Foundation, Inc.,
22
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23
*/
24
25
#include "syshead.h"
26
27
#if P2MP_SERVER
28
29
#include "multi.h"
30
#include "push.h"
31
#include "misc.h"
32
#include "otime.h"
33
#include "gremlin.h"
34
35
#include "memdbg.h"
36
37
#include "forward-inline.h"
38
#include "pf-inline.h"
39
40
/*#define MULTI_DEBUG_EVENT_LOOP*/
41
42
#ifdef MULTI_DEBUG_EVENT_LOOP
43
static const char *
44
id (struct multi_instance *mi)
45
{
46
if (mi)
47
return tls_common_name (mi->context.c2.tls_multi, false);
48
else
49
return "NULL";
50
}
51
#endif
52
53
#ifdef MANAGEMENT_DEF_AUTH
54
static void
55
set_cc_config (struct multi_instance *mi, struct buffer_list *cc_config)
56
{
57
if (mi->cc_config)
58
buffer_list_free (mi->cc_config);
59
mi->cc_config = cc_config;
60
}
61
#endif
62
63
static bool
64
learn_address_script (const struct multi_context *m,
65
const struct multi_instance *mi,
66
const char *op,
67
const struct mroute_addr *addr)
68
{
69
struct gc_arena gc = gc_new ();
70
struct env_set *es;
71
bool ret = true;
72
struct plugin_list *plugins;
73
74
/* get environmental variable source */
75
if (mi && mi->context.c2.es)
76
es = mi->context.c2.es;
77
else
78
es = env_set_create (&gc);
79
80
/* get plugin source */
81
if (mi)
82
plugins = mi->context.plugins;
83
else
84
plugins = m->top.plugins;
85
86
if (plugin_defined (plugins, OPENVPN_PLUGIN_LEARN_ADDRESS))
87
{
88
struct argv argv = argv_new ();
89
argv_printf (&argv, "%s %s",
90
op,
91
mroute_addr_print (addr, &gc));
92
if (mi)
93
argv_printf_cat (&argv, "%s", tls_common_name (mi->context.c2.tls_multi, false));
94
if (plugin_call (plugins, OPENVPN_PLUGIN_LEARN_ADDRESS, &argv, NULL, es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
95
{
96
msg (M_WARN, "WARNING: learn-address plugin call failed");
97
ret = false;
98
}
99
argv_reset (&argv);
100
}
101
102
if (m->top.options.learn_address_script)
103
{
104
struct argv argv = argv_new ();
105
setenv_str (es, "script_type", "learn-address");
106
argv_printf (&argv, "%sc %s %s",
107
m->top.options.learn_address_script,
108
op,
109
mroute_addr_print (addr, &gc));
110
if (mi)
111
argv_printf_cat (&argv, "%s", tls_common_name (mi->context.c2.tls_multi, false));
112
if (!openvpn_execve_check (&argv, es, S_SCRIPT, "WARNING: learn-address command failed"))
113
ret = false;
114
argv_reset (&argv);
115
}
116
117
gc_free (&gc);
118
return ret;
119
}
120
121
void
122
multi_ifconfig_pool_persist (struct multi_context *m, bool force)
123
{
124
/* write pool data to file */
125
if (m->ifconfig_pool
126
&& m->top.c1.ifconfig_pool_persist
127
&& (force || ifconfig_pool_write_trigger (m->top.c1.ifconfig_pool_persist)))
128
{
129
ifconfig_pool_write (m->top.c1.ifconfig_pool_persist, m->ifconfig_pool);
130
}
131
}
132
133
static void
134
multi_reap_range (const struct multi_context *m,
135
int start_bucket,
136
int end_bucket)
137
{
138
struct gc_arena gc = gc_new ();
139
struct hash_iterator hi;
140
struct hash_element *he;
141
142
if (start_bucket < 0)
143
{
144
start_bucket = 0;
145
end_bucket = hash_n_buckets (m->vhash);
146
}
147
148
dmsg (D_MULTI_DEBUG, "MULTI: REAP range %d -> %d", start_bucket, end_bucket);
149
hash_iterator_init_range (m->vhash, &hi, true, start_bucket, end_bucket);
150
while ((he = hash_iterator_next (&hi)) != NULL)
151
{
152
struct multi_route *r = (struct multi_route *) he->value;
153
if (!multi_route_defined (m, r))
154
{
155
dmsg (D_MULTI_DEBUG, "MULTI: REAP DEL %s",
156
mroute_addr_print (&r->addr, &gc));
157
learn_address_script (m, NULL, "delete", &r->addr);
158
multi_route_del (r);
159
hash_iterator_delete_element (&hi);
160
}
161
}
162
hash_iterator_free (&hi);
163
gc_free (&gc);
164
}
165
166
static void
167
multi_reap_all (const struct multi_context *m)
168
{
169
multi_reap_range (m, -1, 0);
170
}
171
172
static struct multi_reap *
173
multi_reap_new (int buckets_per_pass)
174
{
175
struct multi_reap *mr;
176
ALLOC_OBJ (mr, struct multi_reap);
177
mr->bucket_base = 0;
178
mr->buckets_per_pass = buckets_per_pass;
179
mr->last_call = now;
180
return mr;
181
}
182
183
void
184
multi_reap_process_dowork (const struct multi_context *m)
185
{
186
struct multi_reap *mr = m->reaper;
187
if (mr->bucket_base >= hash_n_buckets (m->vhash))
188
mr->bucket_base = 0;
189
multi_reap_range (m, mr->bucket_base, mr->bucket_base + mr->buckets_per_pass);
190
mr->bucket_base += mr->buckets_per_pass;
191
mr->last_call = now;
192
}
193
194
static void
195
multi_reap_free (struct multi_reap *mr)
196
{
197
free (mr);
198
}
199
200
/*
201
* How many buckets in vhash to reap per pass.
202
*/
203
static int
204
reap_buckets_per_pass (int n_buckets)
205
{
206
return constrain_int (n_buckets / REAP_DIVISOR, REAP_MIN, REAP_MAX);
207
}
208
209
#ifdef MANAGEMENT_DEF_AUTH
210
211
static uint32_t
212
cid_hash_function (const void *key, uint32_t iv)
213
{
214
const unsigned long *k = (const unsigned long *)key;
215
return (uint32_t) *k;
216
}
217
218
static bool
219
cid_compare_function (const void *key1, const void *key2)
220
{
221
const unsigned long *k1 = (const unsigned long *)key1;
222
const unsigned long *k2 = (const unsigned long *)key2;
223
return *k1 == *k2;
224
}
225
226
#endif
227
228
/*
229
* Main initialization function, init multi_context object.
230
*/
231
void
232
multi_init (struct multi_context *m, struct context *t, bool tcp_mode, int thread_mode)
233
{
234
int dev = DEV_TYPE_UNDEF;
235
236
msg (D_MULTI_LOW, "MULTI: multi_init called, r=%d v=%d",
237
t->options.real_hash_size,
238
t->options.virtual_hash_size);
239
240
/*
241
* Get tun/tap/null device type
242
*/
243
dev = dev_type_enum (t->options.dev, t->options.dev_type);
244
245
/*
246
* Init our multi_context object.
247
*/
248
CLEAR (*m);
249
250
m->thread_mode = thread_mode;
251
252
/*
253
* Real address hash table (source port number is
254
* considered to be part of the address). Used
255
* to determine which client sent an incoming packet
256
* which is seen on the TCP/UDP socket.
257
*/
258
m->hash = hash_init (t->options.real_hash_size,
259
get_random (),
260
mroute_addr_hash_function,
261
mroute_addr_compare_function);
262
263
/*
264
* Virtual address hash table. Used to determine
265
* which client to route a packet to.
266
*/
267
m->vhash = hash_init (t->options.virtual_hash_size,
268
get_random (),
269
mroute_addr_hash_function,
270
mroute_addr_compare_function);
271
272
/*
273
* This hash table is a clone of m->hash but with a
274
* bucket size of one so that it can be used
275
* for fast iteration through the list.
276
*/
277
m->iter = hash_init (1,
278
get_random (),
279
mroute_addr_hash_function,
280
mroute_addr_compare_function);
281
282
#ifdef MANAGEMENT_DEF_AUTH
283
m->cid_hash = hash_init (t->options.real_hash_size,
284
0,
285
cid_hash_function,
286
cid_compare_function);
287
#endif
288
289
/*
290
* This is our scheduler, for time-based wakeup
291
* events.
292
*/
293
m->schedule = schedule_init ();
294
295
/*
296
* Limit frequency of incoming connections to control
297
* DoS.
298
*/
299
m->new_connection_limiter = frequency_limit_init (t->options.cf_max,
300
t->options.cf_per);
301
302
/*
303
* Allocate broadcast/multicast buffer list
304
*/
305
m->mbuf = mbuf_init (t->options.n_bcast_buf);
306
307
/*
308
* Different status file format options are available
309
*/
310
m->status_file_version = t->options.status_file_version;
311
312
/*
313
* Possibly allocate an ifconfig pool, do it
314
* differently based on whether a tun or tap style
315
* tunnel.
316
*/
317
if (t->options.ifconfig_pool_defined)
318
{
319
if (dev == DEV_TYPE_TAP)
320
{
321
m->ifconfig_pool = ifconfig_pool_init (IFCONFIG_POOL_INDIV,
322
t->options.ifconfig_pool_start,
323
t->options.ifconfig_pool_end,
324
t->options.duplicate_cn);
325
}
326
else if (dev == DEV_TYPE_TUN)
327
{
328
m->ifconfig_pool = ifconfig_pool_init (
329
(t->options.topology == TOP_NET30) ? IFCONFIG_POOL_30NET : IFCONFIG_POOL_INDIV,
330
t->options.ifconfig_pool_start,
331
t->options.ifconfig_pool_end,
332
t->options.duplicate_cn);
333
}
334
else
335
{
336
ASSERT (0);
337
}
338
339
/* reload pool data from file */
340
if (t->c1.ifconfig_pool_persist)
341
ifconfig_pool_read (t->c1.ifconfig_pool_persist, m->ifconfig_pool);
342
}
343
344
/*
345
* Help us keep track of routing table.
346
*/
347
m->route_helper = mroute_helper_init (MULTI_CACHE_ROUTE_TTL);
348
349
/*
350
* Initialize route and instance reaper.
351
*/
352
m->reaper = multi_reap_new (reap_buckets_per_pass (t->options.virtual_hash_size));
353
354
/*
355
* Get local ifconfig address
356
*/
357
CLEAR (m->local);
358
ASSERT (t->c1.tuntap);
359
mroute_extract_in_addr_t (&m->local, t->c1.tuntap->local);
360
361
/*
362
* Per-client limits
363
*/
364
m->max_clients = t->options.max_clients;
365
366
/*
367
* Initialize multi-socket TCP I/O wait object
368
*/
369
if (tcp_mode)
370
m->mtcp = multi_tcp_init (t->options.max_clients, &m->max_clients);
371
m->tcp_queue_limit = t->options.tcp_queue_limit;
372
373
/*
374
* Allow client <-> client communication, without going through
375
* tun/tap interface and network stack?
376
*/
377
m->enable_c2c = t->options.enable_c2c;
378
}
379
380
const char *
381
multi_instance_string (const struct multi_instance *mi, bool null, struct gc_arena *gc)
382
{
383
if (mi)
384
{
385
struct buffer out = alloc_buf_gc (256, gc);
386
const char *cn = tls_common_name (mi->context.c2.tls_multi, true);
387
388
if (cn)
389
buf_printf (&out, "%s/", cn);
390
buf_printf (&out, "%s", mroute_addr_print (&mi->real, gc));
391
return BSTR (&out);
392
}
393
else if (null)
394
return NULL;
395
else
396
return "UNDEF";
397
}
398
399
void
400
generate_prefix (struct multi_instance *mi)
401
{
402
mi->msg_prefix = multi_instance_string (mi, true, &mi->gc);
403
set_prefix (mi);
404
}
405
406
void
407
ungenerate_prefix (struct multi_instance *mi)
408
{
409
mi->msg_prefix = NULL;
410
set_prefix (mi);
411
}
412
413
static const char *
414
mi_prefix (const struct multi_instance *mi)
415
{
416
if (mi && mi->msg_prefix)
417
return mi->msg_prefix;
418
else
419
return "UNDEF_I";
420
}
421
422
/*
423
* Tell the route helper about deleted iroutes so
424
* that it can update its mask of currently used
425
* CIDR netlengths.
426
*/
427
static void
428
multi_del_iroutes (struct multi_context *m,
429
struct multi_instance *mi)
430
{
431
const struct iroute *ir;
432
if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN)
433
{
434
for (ir = mi->context.options.iroutes; ir != NULL; ir = ir->next)
435
mroute_helper_del_iroute (m->route_helper, ir);
436
}
437
}
438
439
static void
440
setenv_stats (struct context *c)
441
{
442
setenv_counter (c->c2.es, "bytes_received", c->c2.link_read_bytes);
443
setenv_counter (c->c2.es, "bytes_sent", c->c2.link_write_bytes);
444
}
445
446
static void
447
multi_client_disconnect_setenv (struct multi_context *m,
448
struct multi_instance *mi)
449
{
450
/* setenv client real IP address */
451
setenv_trusted (mi->context.c2.es, get_link_socket_info (&mi->context));
452
453
/* setenv stats */
454
setenv_stats (&mi->context);
455
456
/* setenv connection duration */
457
{
458
const unsigned int duration = (unsigned int) now - mi->created;
459
setenv_unsigned (mi->context.c2.es, "time_duration", duration);
460
}
461
}
462
463
static void
464
multi_client_disconnect_script (struct multi_context *m,
465
struct multi_instance *mi)
466
{
467
if ((mi->context.c2.context_auth == CAS_SUCCEEDED && mi->connection_established_flag)
468
|| mi->context.c2.context_auth == CAS_PARTIAL)
469
{
470
multi_client_disconnect_setenv (m, mi);
471
472
if (plugin_defined (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_DISCONNECT))
473
{
474
if (plugin_call (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_DISCONNECT, NULL, NULL, mi->context.c2.es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
475
msg (M_WARN, "WARNING: client-disconnect plugin call failed");
476
}
477
478
if (mi->context.options.client_disconnect_script)
479
{
480
struct argv argv = argv_new ();
481
setenv_str (mi->context.c2.es, "script_type", "client-disconnect");
482
argv_printf (&argv, "%sc", mi->context.options.client_disconnect_script);
483
openvpn_execve_check (&argv, mi->context.c2.es, S_SCRIPT, "client-disconnect command failed");
484
argv_reset (&argv);
485
}
486
#ifdef MANAGEMENT_DEF_AUTH
487
if (management)
488
management_notify_client_close (management, &mi->context.c2.mda_context, mi->context.c2.es);
489
#endif
490
491
}
492
}
493
494
void
495
multi_close_instance (struct multi_context *m,
496
struct multi_instance *mi,
497
bool shutdown)
498
{
499
perf_push (PERF_MULTI_CLOSE_INSTANCE);
500
501
ASSERT (!mi->halt);
502
mi->halt = true;
503
504
dmsg (D_MULTI_DEBUG, "MULTI: multi_close_instance called");
505
506
/* adjust current client connection count */
507
m->n_clients += mi->n_clients_delta;
508
mi->n_clients_delta = 0;
509
510
/* prevent dangling pointers */
511
if (m->pending == mi)
512
multi_set_pending (m, NULL);
513
if (m->earliest_wakeup == mi)
514
m->earliest_wakeup = NULL;
515
516
if (!shutdown)
517
{
518
if (mi->did_real_hash)
519
{
520
ASSERT (hash_remove (m->hash, &mi->real));
521
}
522
if (mi->did_iter)
523
{
524
ASSERT (hash_remove (m->iter, &mi->real));
525
}
526
#ifdef MANAGEMENT_DEF_AUTH
527
if (mi->did_cid_hash)
528
{
529
ASSERT (hash_remove (m->cid_hash, &mi->context.c2.mda_context.cid));
530
}
531
#endif
532
533
schedule_remove_entry (m->schedule, (struct schedule_entry *) mi);
534
535
ifconfig_pool_release (m->ifconfig_pool, mi->vaddr_handle, false);
536
537
if (mi->did_iroutes)
538
{
539
multi_del_iroutes (m, mi);
540
mi->did_iroutes = false;
541
}
542
543
if (m->mtcp)
544
multi_tcp_dereference_instance (m->mtcp, mi);
545
546
mbuf_dereference_instance (m->mbuf, mi);
547
}
548
549
#ifdef MANAGEMENT_DEF_AUTH
550
set_cc_config (mi, NULL);
551
#endif
552
553
multi_client_disconnect_script (m, mi);
554
555
if (mi->did_open_context)
556
close_context (&mi->context, SIGTERM, CC_GC_FREE);
557
558
multi_tcp_instance_specific_free (mi);
559
560
ungenerate_prefix (mi);
561
562
/*
563
* Don't actually delete the instance memory allocation yet,
564
* because virtual routes may still point to it. Let the
565
* vhash reaper deal with it.
566
*/
567
multi_instance_dec_refcount (mi);
568
569
perf_pop ();
570
}
571
572
/*
573
* Called on shutdown or restart.
574
*/
575
void
576
multi_uninit (struct multi_context *m)
577
{
578
if (m->thread_mode & MC_WORK_THREAD)
579
{
580
multi_top_free (m);
581
m->thread_mode = MC_UNDEF;
582
}
583
else if (m->thread_mode)
584
{
585
if (m->hash)
586
{
587
struct hash_iterator hi;
588
struct hash_element *he;
589
590
hash_iterator_init (m->iter, &hi, true);
591
while ((he = hash_iterator_next (&hi)))
592
{
593
struct multi_instance *mi = (struct multi_instance *) he->value;
594
mi->did_iter = false;
595
multi_close_instance (m, mi, true);
596
}
597
hash_iterator_free (&hi);
598
599
multi_reap_all (m);
600
601
hash_free (m->hash);
602
hash_free (m->vhash);
603
hash_free (m->iter);
604
#ifdef MANAGEMENT_DEF_AUTH
605
hash_free (m->cid_hash);
606
#endif
607
m->hash = NULL;
608
609
schedule_free (m->schedule);
610
mbuf_free (m->mbuf);
611
ifconfig_pool_free (m->ifconfig_pool);
612
frequency_limit_free (m->new_connection_limiter);
613
multi_reap_free (m->reaper);
614
mroute_helper_free (m->route_helper);
615
multi_tcp_free (m->mtcp);
616
m->thread_mode = MC_UNDEF;
617
}
618
}
619
}
620
621
/*
622
* Create a client instance object for a newly connected client.
623
*/
624
struct multi_instance *
625
multi_create_instance (struct multi_context *m, const struct mroute_addr *real)
626
{
627
struct gc_arena gc = gc_new ();
628
struct multi_instance *mi;
629
630
perf_push (PERF_MULTI_CREATE_INSTANCE);
631
632
msg (D_MULTI_LOW, "MULTI: multi_create_instance called");
633
634
ALLOC_OBJ_CLEAR (mi, struct multi_instance);
635
636
mutex_init (&mi->mutex);
637
mi->gc = gc_new ();
638
multi_instance_inc_refcount (mi);
639
mi->vaddr_handle = -1;
640
mi->created = now;
641
mroute_addr_init (&mi->real);
642
643
if (real)
644
{
645
mi->real = *real;
646
generate_prefix (mi);
647
}
648
649
mi->did_open_context = true;
650
inherit_context_child (&mi->context, &m->top);
651
if (IS_SIG (&mi->context))
652
goto err;
653
654
mi->context.c2.context_auth = CAS_PENDING;
655
656
if (hash_n_elements (m->hash) >= m->max_clients)
657
{
658
msg (D_MULTI_ERRORS, "MULTI: new incoming connection would exceed maximum number of clients (%d)", m->max_clients);
659
goto err;
660
}
661
662
if (!real) /* TCP mode? */
663
{
664
if (!multi_tcp_instance_specific_init (m, mi))
665
goto err;
666
generate_prefix (mi);
667
}
668
669
if (!hash_add (m->iter, &mi->real, mi, false))
670
{
671
msg (D_MULTI_LOW, "MULTI: unable to add real address [%s] to iterator hash table",
672
mroute_addr_print (&mi->real, &gc));
673
goto err;
674
}
675
mi->did_iter = true;
676
677
#ifdef MANAGEMENT_DEF_AUTH
678
do {
679
mi->context.c2.mda_context.cid = m->cid_counter++;
680
} while (!hash_add (m->cid_hash, &mi->context.c2.mda_context.cid, mi, false));
681
mi->did_cid_hash = true;
682
#endif
683
684
mi->context.c2.push_reply_deferred = true;
685
686
if (!multi_process_post (m, mi, MPP_PRE_SELECT))
687
{
688
msg (D_MULTI_ERRORS, "MULTI: signal occurred during client instance initialization");
689
goto err;
690
}
691
692
perf_pop ();
693
gc_free (&gc);
694
return mi;
695
696
err:
697
multi_close_instance (m, mi, false);
698
perf_pop ();
699
gc_free (&gc);
700
return NULL;
701
}
702
703
/*
704
* Dump tables -- triggered by SIGUSR2.
705
* If status file is defined, write to file.
706
* If status file is NULL, write to syslog.
707
*/
708
void
709
multi_print_status (struct multi_context *m, struct status_output *so, const int version)
710
{
711
if (m->hash)
712
{
713
struct gc_arena gc_top = gc_new ();
714
struct hash_iterator hi;
715
const struct hash_element *he;
716
717
status_reset (so);
718
719
if (version == 1) /* WAS: m->status_file_version */
720
{
721
/*
722
* Status file version 1
723
*/
724
status_printf (so, PACKAGE_NAME " CLIENT LIST");
725
status_printf (so, "Updated,%s", time_string (0, 0, false, &gc_top));
726
status_printf (so, "Common Name,Real Address,Bytes Received,Bytes Sent,Connected Since");
727
hash_iterator_init (m->hash, &hi, true);
728
while ((he = hash_iterator_next (&hi)))
729
{
730
struct gc_arena gc = gc_new ();
731
const struct multi_instance *mi = (struct multi_instance *) he->value;
732
733
if (!mi->halt)
734
{
735
status_printf (so, "%s,%s," counter_format "," counter_format ",%s",
736
tls_common_name (mi->context.c2.tls_multi, false),
737
mroute_addr_print (&mi->real, &gc),
738
mi->context.c2.link_read_bytes,
739
mi->context.c2.link_write_bytes,
740
time_string (mi->created, 0, false, &gc));
741
}
742
gc_free (&gc);
743
}
744
hash_iterator_free (&hi);
745
746
status_printf (so, "ROUTING TABLE");
747
status_printf (so, "Virtual Address,Common Name,Real Address,Last Ref");
748
hash_iterator_init (m->vhash, &hi, true);
749
while ((he = hash_iterator_next (&hi)))
750
{
751
struct gc_arena gc = gc_new ();
752
const struct multi_route *route = (struct multi_route *) he->value;
753
754
if (multi_route_defined (m, route))
755
{
756
const struct multi_instance *mi = route->instance;
757
const struct mroute_addr *ma = &route->addr;
758
char flags[2] = {0, 0};
759
760
if (route->flags & MULTI_ROUTE_CACHE)
761
flags[0] = 'C';
762
status_printf (so, "%s%s,%s,%s,%s",
763
mroute_addr_print (ma, &gc),
764
flags,
765
tls_common_name (mi->context.c2.tls_multi, false),
766
mroute_addr_print (&mi->real, &gc),
767
time_string (route->last_reference, 0, false, &gc));
768
}
769
gc_free (&gc);
770
}
771
hash_iterator_free (&hi);
772
773
status_printf (so, "GLOBAL STATS");
774
if (m->mbuf)
775
status_printf (so, "Max bcast/mcast queue length,%d",
776
mbuf_maximum_queued (m->mbuf));
777
778
status_printf (so, "END");
779
}
780
else if (version == 2 || version == 3)
781
{
782
const char sep = (version == 3) ? '\t' : ',';
783
784
/*
785
* Status file version 2 and 3
786
*/
787
status_printf (so, "TITLE%c%s", sep, title_string);
788
status_printf (so, "TIME%c%s%c%u", sep, time_string (now, 0, false, &gc_top), sep, (unsigned int)now);
789
status_printf (so, "HEADER%cCLIENT_LIST%cCommon Name%cReal Address%cVirtual Address%cBytes Received%cBytes Sent%cConnected Since%cConnected Since (time_t)",
790
sep, sep, sep, sep, sep, sep, sep, sep);
791
hash_iterator_init (m->hash, &hi, true);
792
while ((he = hash_iterator_next (&hi)))
793
{
794
struct gc_arena gc = gc_new ();
795
const struct multi_instance *mi = (struct multi_instance *) he->value;
796
797
if (!mi->halt)
798
{
799
status_printf (so, "CLIENT_LIST%c%s%c%s%c%s%c" counter_format "%c" counter_format "%c%s%c%u",
800
sep, tls_common_name (mi->context.c2.tls_multi, false),
801
sep, mroute_addr_print (&mi->real, &gc),
802
sep, print_in_addr_t (mi->reporting_addr, IA_EMPTY_IF_UNDEF, &gc),
803
sep, mi->context.c2.link_read_bytes,
804
sep, mi->context.c2.link_write_bytes,
805
sep, time_string (mi->created, 0, false, &gc),
806
sep, (unsigned int)mi->created);
807
}
808
gc_free (&gc);
809
}
810
hash_iterator_free (&hi);
811
812
status_printf (so, "HEADER%cROUTING_TABLE%cVirtual Address%cCommon Name%cReal Address%cLast Ref%cLast Ref (time_t)",
813
sep, sep, sep, sep, sep, sep);
814
hash_iterator_init (m->vhash, &hi, true);
815
while ((he = hash_iterator_next (&hi)))
816
{
817
struct gc_arena gc = gc_new ();
818
const struct multi_route *route = (struct multi_route *) he->value;
819
820
if (multi_route_defined (m, route))
821
{
822
const struct multi_instance *mi = route->instance;
823
const struct mroute_addr *ma = &route->addr;
824
char flags[2] = {0, 0};
825
826
if (route->flags & MULTI_ROUTE_CACHE)
827
flags[0] = 'C';
828
status_printf (so, "ROUTING_TABLE%c%s%s%c%s%c%s%c%s%c%u",
829
sep, mroute_addr_print (ma, &gc), flags,
830
sep, tls_common_name (mi->context.c2.tls_multi, false),
831
sep, mroute_addr_print (&mi->real, &gc),
832
sep, time_string (route->last_reference, 0, false, &gc),
833
sep, (unsigned int)route->last_reference);
834
}
835
gc_free (&gc);
836
}
837
hash_iterator_free (&hi);
838
839
if (m->mbuf)
840
status_printf (so, "GLOBAL_STATS%cMax bcast/mcast queue length%c%d",
841
sep, sep, mbuf_maximum_queued (m->mbuf));
842
843
status_printf (so, "END");
844
}
845
else
846
{
847
status_printf (so, "ERROR: bad status format version number");
848
}
849
850
#ifdef PACKET_TRUNCATION_CHECK
851
{
852
status_printf (so, "HEADER,ERRORS,Common Name,TUN Read Trunc,TUN Write Trunc,Pre-encrypt Trunc,Post-decrypt Trunc");
853
hash_iterator_init (m->hash, &hi, true);
854
while ((he = hash_iterator_next (&hi)))
855
{
856
struct gc_arena gc = gc_new ();
857
const struct multi_instance *mi = (struct multi_instance *) he->value;
858
859
if (!mi->halt)
860
{
861
status_printf (so, "ERRORS,%s," counter_format "," counter_format "," counter_format "," counter_format,
862
tls_common_name (mi->context.c2.tls_multi, false),
863
m->top.c2.n_trunc_tun_read,
864
mi->context.c2.n_trunc_tun_write,
865
mi->context.c2.n_trunc_pre_encrypt,
866
mi->context.c2.n_trunc_post_decrypt);
867
}
868
gc_free (&gc);
869
}
870
hash_iterator_free (&hi);
871
}
872
#endif
873
874
status_flush (so);
875
gc_free (&gc_top);
876
}
877
}
878
879
/*
880
* Learn a virtual address or route.
881
* The learn will fail if the learn address
882
* script/plugin fails. In this case the
883
* return value may be != mi.
884
* Return the instance which owns this route,
885
* or NULL if none.
886
*/
887
static struct multi_instance *
888
multi_learn_addr (struct multi_context *m,
889
struct multi_instance *mi,
890
const struct mroute_addr *addr,
891
const unsigned int flags)
892
{
893
struct hash_element *he;
894
const uint32_t hv = hash_value (m->vhash, addr);
895
struct hash_bucket *bucket = hash_bucket (m->vhash, hv);
896
struct multi_route *oldroute = NULL;
897
struct multi_instance *owner = NULL;
898
899
hash_bucket_lock (bucket);
900
901
/* if route currently exists, get the instance which owns it */
902
he = hash_lookup_fast (m->vhash, bucket, addr, hv);
903
if (he)
904
oldroute = (struct multi_route *) he->value;
905
if (oldroute && multi_route_defined (m, oldroute))
906
owner = oldroute->instance;
907
908
/* do we need to add address to hash table? */
909
if ((!owner || owner != mi)
910
&& mroute_learnable_address (addr)
911
&& !mroute_addr_equal (addr, &m->local))
912
{
913
struct gc_arena gc = gc_new ();
914
struct multi_route *newroute;
915
bool learn_succeeded = false;
916
917
ALLOC_OBJ (newroute, struct multi_route);
918
newroute->addr = *addr;
919
newroute->instance = mi;
920
newroute->flags = flags;
921
newroute->last_reference = now;
922
newroute->cache_generation = 0;
923
924
/* The cache is invalidated when cache_generation is incremented */
925
if (flags & MULTI_ROUTE_CACHE)
926
newroute->cache_generation = m->route_helper->cache_generation;
927
928
if (oldroute) /* route already exists? */
929
{
930
if (route_quota_test (m, mi) && learn_address_script (m, mi, "update", &newroute->addr))
931
{
932
learn_succeeded = true;
933
owner = mi;
934
multi_instance_inc_refcount (mi);
935
route_quota_inc (mi);
936
937
/* delete old route */
938
multi_route_del (oldroute);
939
940
/* modify hash table entry, replacing old route */
941
he->key = &newroute->addr;
942
he->value = newroute;
943
}
944
}
945
else
946
{
947
if (route_quota_test (m, mi) && learn_address_script (m, mi, "add", &newroute->addr))
948
{
949
learn_succeeded = true;
950
owner = mi;
951
multi_instance_inc_refcount (mi);
952
route_quota_inc (mi);
953
954
/* add new route */
955
hash_add_fast (m->vhash, bucket, &newroute->addr, hv, newroute);
956
}
957
}
958
959
msg (D_MULTI_LOW, "MULTI: Learn%s: %s -> %s",
960
learn_succeeded ? "" : " FAILED",
961
mroute_addr_print (&newroute->addr, &gc),
962
multi_instance_string (mi, false, &gc));
963
964
if (!learn_succeeded)
965
free (newroute);
966
967
gc_free (&gc);
968
}
969
970
hash_bucket_unlock (bucket);
971
return owner;
972
}
973
974
/*
975
* Get client instance based on virtual address.
976
*/
977
static struct multi_instance *
978
multi_get_instance_by_virtual_addr (struct multi_context *m,
979
const struct mroute_addr *addr,
980
bool cidr_routing)
981
{
982
struct multi_route *route;
983
struct multi_instance *ret = NULL;
984
985
/* check for local address */
986
if (mroute_addr_equal (addr, &m->local))
987
return NULL;
988
989
route = (struct multi_route *) hash_lookup (m->vhash, addr);
990
991
/* does host route (possible cached) exist? */
992
if (route && multi_route_defined (m, route))
993
{
994
struct multi_instance *mi = route->instance;
995
route->last_reference = now;
996
ret = mi;
997
}
998
else if (cidr_routing) /* do we need to regenerate a host route cache entry? */
999
{
1000
struct mroute_helper *rh = m->route_helper;
1001
struct mroute_addr tryaddr;
1002
int i;
1003
1004
mroute_helper_lock (rh);
1005
1006
/* cycle through each CIDR length */
1007
for (i = 0; i < rh->n_net_len; ++i)
1008
{
1009
tryaddr = *addr;
1010
tryaddr.type |= MR_WITH_NETBITS;
1011
tryaddr.netbits = rh->net_len[i];
1012
mroute_addr_mask_host_bits (&tryaddr);
1013
1014
/* look up a possible route with netbits netmask */
1015
route = (struct multi_route *) hash_lookup (m->vhash, &tryaddr);
1016
1017
if (route && multi_route_defined (m, route))
1018
{
1019
/* found an applicable route, cache host route */
1020
struct multi_instance *mi = route->instance;
1021
multi_learn_addr (m, mi, addr, MULTI_ROUTE_CACHE|MULTI_ROUTE_AGEABLE);
1022
ret = mi;
1023
break;
1024
}
1025
}
1026
1027
mroute_helper_unlock (rh);
1028
}
1029
1030
#ifdef ENABLE_DEBUG
1031
if (check_debug_level (D_MULTI_DEBUG))
1032
{
1033
struct gc_arena gc = gc_new ();
1034
const char *addr_text = mroute_addr_print (addr, &gc);
1035
if (ret)
1036
{
1037
dmsg (D_MULTI_DEBUG, "GET INST BY VIRT: %s -> %s via %s",
1038
addr_text,
1039
multi_instance_string (ret, false, &gc),
1040
mroute_addr_print (&route->addr, &gc));
1041
}
1042
else
1043
{
1044
dmsg (D_MULTI_DEBUG, "GET INST BY VIRT: %s [failed]",
1045
addr_text);
1046
}
1047
gc_free (&gc);
1048
}
1049
#endif
1050
1051
ASSERT (!(ret && ret->halt));
1052
return ret;
1053
}
1054
1055
/*
1056
* Helper function to multi_learn_addr().
1057
*/
1058
static struct multi_instance *
1059
multi_learn_in_addr_t (struct multi_context *m,
1060
struct multi_instance *mi,
1061
in_addr_t a,
1062
int netbits, /* -1 if host route, otherwise # of network bits in address */
1063
bool primary)
1064
{
1065
struct openvpn_sockaddr remote_si;
1066
struct mroute_addr addr;
1067
1068
CLEAR (remote_si);
1069
remote_si.sa.sin_family = AF_INET;
1070
remote_si.sa.sin_addr.s_addr = htonl (a);
1071
ASSERT (mroute_extract_openvpn_sockaddr (&addr, &remote_si, false));
1072
1073
if (netbits >= 0)
1074
{
1075
addr.type |= MR_WITH_NETBITS;
1076
addr.netbits = (uint8_t) netbits;
1077
}
1078
1079
{
1080
struct multi_instance *owner = multi_learn_addr (m, mi, &addr, 0);
1081
#ifdef MANAGEMENT_DEF_AUTH
1082
if (management && owner)
1083
management_learn_addr (management, &mi->context.c2.mda_context, &addr, primary);
1084
#endif
1085
return owner;
1086
}
1087
}
1088
1089
/*
1090
* A new client has connected, add routes (server -> client)
1091
* to internal routing table.
1092
*/
1093
static void
1094
multi_add_iroutes (struct multi_context *m,
1095
struct multi_instance *mi)
1096
{
1097
struct gc_arena gc = gc_new ();
1098
const struct iroute *ir;
1099
if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN)
1100
{
1101
mi->did_iroutes = true;
1102
for (ir = mi->context.options.iroutes; ir != NULL; ir = ir->next)
1103
{
1104
if (ir->netbits >= 0)
1105
msg (D_MULTI_LOW, "MULTI: internal route %s/%d -> %s",
1106
print_in_addr_t (ir->network, 0, &gc),
1107
ir->netbits,
1108
multi_instance_string (mi, false, &gc));
1109
else
1110
msg (D_MULTI_LOW, "MULTI: internal route %s -> %s",
1111
print_in_addr_t (ir->network, 0, &gc),
1112
multi_instance_string (mi, false, &gc));
1113
1114
mroute_helper_add_iroute (m->route_helper, ir);
1115
1116
multi_learn_in_addr_t (m, mi, ir->network, ir->netbits, false);
1117
}
1118
}
1119
gc_free (&gc);
1120
}
1121
1122
/*
1123
* Given an instance (new_mi), delete all other instances which use the
1124
* same common name.
1125
*/
1126
static void
1127
multi_delete_dup (struct multi_context *m, struct multi_instance *new_mi)
1128
{
1129
if (new_mi)
1130
{
1131
const char *new_cn = tls_common_name (new_mi->context.c2.tls_multi, true);
1132
if (new_cn)
1133
{
1134
struct hash_iterator hi;
1135
struct hash_element *he;
1136
int count = 0;
1137
1138
hash_iterator_init (m->iter, &hi, true);
1139
while ((he = hash_iterator_next (&hi)))
1140
{
1141
struct multi_instance *mi = (struct multi_instance *) he->value;
1142
if (mi != new_mi && !mi->halt)
1143
{
1144
const char *cn = tls_common_name (mi->context.c2.tls_multi, true);
1145
if (cn && !strcmp (cn, new_cn))
1146
{
1147
mi->did_iter = false;
1148
multi_close_instance (m, mi, false);
1149
hash_iterator_delete_element (&hi);
1150
++count;
1151
}
1152
}
1153
}
1154
hash_iterator_free (&hi);
1155
1156
if (count)
1157
msg (D_MULTI_LOW, "MULTI: new connection by client '%s' will cause previous active sessions by this client to be dropped. Remember to use the --duplicate-cn option if you want multiple clients using the same certificate or username to concurrently connect.", new_cn);
1158
}
1159
}
1160
}
1161
1162
/*
1163
* Ensure that endpoint to be pushed to client
1164
* complies with --ifconfig-push-constraint directive.
1165
*/
1166
static bool
1167
ifconfig_push_constraint_satisfied (const struct context *c)
1168
{
1169
const struct options *o = &c->options;
1170
if (o->push_ifconfig_constraint_defined && c->c2.push_ifconfig_defined)
1171
return (o->push_ifconfig_constraint_netmask & c->c2.push_ifconfig_local) == o->push_ifconfig_constraint_network;
1172
else
1173
return true;
1174
}
1175
1176
/*
1177
* Select a virtual address for a new client instance.
1178
* Use an --ifconfig-push directive, if given (static IP).
1179
* Otherwise use an --ifconfig-pool address (dynamic IP).
1180
*/
1181
static void
1182
multi_select_virtual_addr (struct multi_context *m, struct multi_instance *mi)
1183
{
1184
struct gc_arena gc = gc_new ();
1185
1186
/*
1187
* If ifconfig addresses were set by dynamic config file,
1188
* release pool addresses, otherwise keep them.
1189
*/
1190
if (mi->context.options.push_ifconfig_defined)
1191
{
1192
/* ifconfig addresses were set statically,
1193
release dynamic allocation */
1194
if (mi->vaddr_handle >= 0)
1195
{
1196
ifconfig_pool_release (m->ifconfig_pool, mi->vaddr_handle, true);
1197
mi->vaddr_handle = -1;
1198
}
1199
1200
mi->context.c2.push_ifconfig_defined = true;
1201
mi->context.c2.push_ifconfig_local = mi->context.options.push_ifconfig_local;
1202
mi->context.c2.push_ifconfig_remote_netmask = mi->context.options.push_ifconfig_remote_netmask;
1203
}
1204
else if (m->ifconfig_pool && mi->vaddr_handle < 0) /* otherwise, choose a pool address */
1205
{
1206
in_addr_t local=0, remote=0;
1207
const char *cn = NULL;
1208
1209
if (!mi->context.options.duplicate_cn)
1210
cn = tls_common_name (mi->context.c2.tls_multi, true);
1211
1212
mi->vaddr_handle = ifconfig_pool_acquire (m->ifconfig_pool, &local, &remote, cn);
1213
if (mi->vaddr_handle >= 0)
1214
{
1215
const int tunnel_type = TUNNEL_TYPE (mi->context.c1.tuntap);
1216
const int tunnel_topology = TUNNEL_TOPOLOGY (mi->context.c1.tuntap);
1217
1218
/* set push_ifconfig_remote_netmask from pool ifconfig address(es) */
1219
mi->context.c2.push_ifconfig_local = remote;
1220
if (tunnel_type == DEV_TYPE_TAP || (tunnel_type == DEV_TYPE_TUN && tunnel_topology == TOP_SUBNET))
1221
{
1222
mi->context.c2.push_ifconfig_remote_netmask = mi->context.options.ifconfig_pool_netmask;
1223
if (!mi->context.c2.push_ifconfig_remote_netmask)
1224
mi->context.c2.push_ifconfig_remote_netmask = mi->context.c1.tuntap->remote_netmask;
1225
}
1226
else if (tunnel_type == DEV_TYPE_TUN)
1227
{
1228
if (tunnel_topology == TOP_P2P)
1229
mi->context.c2.push_ifconfig_remote_netmask = mi->context.c1.tuntap->local;
1230
else if (tunnel_topology == TOP_NET30)
1231
mi->context.c2.push_ifconfig_remote_netmask = local;
1232
}
1233
1234
if (mi->context.c2.push_ifconfig_remote_netmask)
1235
mi->context.c2.push_ifconfig_defined = true;
1236
else
1237
msg (D_MULTI_ERRORS, "MULTI: no --ifconfig-pool netmask parameter is available to push to %s",
1238
multi_instance_string (mi, false, &gc));
1239
}
1240
else
1241
{
1242
msg (D_MULTI_ERRORS, "MULTI: no free --ifconfig-pool addresses are available");
1243
}
1244
}
1245
gc_free (&gc);
1246
}
1247
1248
/*
1249
* Set virtual address environmental variables.
1250
*/
1251
static void
1252
multi_set_virtual_addr_env (struct multi_context *m, struct multi_instance *mi)
1253
{
1254
setenv_del (mi->context.c2.es, "ifconfig_pool_local_ip");
1255
setenv_del (mi->context.c2.es, "ifconfig_pool_remote_ip");
1256
setenv_del (mi->context.c2.es, "ifconfig_pool_netmask");
1257
1258
if (mi->context.c2.push_ifconfig_defined)
1259
{
1260
const int tunnel_type = TUNNEL_TYPE (mi->context.c1.tuntap);
1261
const int tunnel_topology = TUNNEL_TOPOLOGY (mi->context.c1.tuntap);
1262
1263
setenv_in_addr_t (mi->context.c2.es,
1264
"ifconfig_pool_remote_ip",
1265
mi->context.c2.push_ifconfig_local,
1266
SA_SET_IF_NONZERO);
1267
1268
if (tunnel_type == DEV_TYPE_TAP || (tunnel_type == DEV_TYPE_TUN && tunnel_topology == TOP_SUBNET))
1269
{
1270
setenv_in_addr_t (mi->context.c2.es,
1271
"ifconfig_pool_netmask",
1272
mi->context.c2.push_ifconfig_remote_netmask,
1273
SA_SET_IF_NONZERO);
1274
}
1275
else if (tunnel_type == DEV_TYPE_TUN)
1276
{
1277
setenv_in_addr_t (mi->context.c2.es,
1278
"ifconfig_pool_local_ip",
1279
mi->context.c2.push_ifconfig_remote_netmask,
1280
SA_SET_IF_NONZERO);
1281
}
1282
}
1283
}
1284
1285
/*
1286
* Called after client-connect script is called
1287
*/
1288
static void
1289
multi_client_connect_post (struct multi_context *m,
1290
struct multi_instance *mi,
1291
const char *dc_file,
1292
unsigned int option_permissions_mask,
1293
unsigned int *option_types_found)
1294
{
1295
/* Did script generate a dynamic config file? */
1296
if (test_file (dc_file))
1297
{
1298
options_server_import (&mi->context.options,
1299
dc_file,
1300
D_IMPORT_ERRORS|M_OPTERR,
1301
option_permissions_mask,
1302
option_types_found,
1303
mi->context.c2.es);
1304
1305
if (!delete_file (dc_file))
1306
msg (D_MULTI_ERRORS, "MULTI: problem deleting temporary file: %s",
1307
dc_file);
1308
1309
/*
1310
* If the --client-connect script generates a config file
1311
* with an --ifconfig-push directive, it will override any
1312
* --ifconfig-push directive from the --client-config-dir
1313
* directory or any --ifconfig-pool dynamic address.
1314
*/
1315
multi_select_virtual_addr (m, mi);
1316
multi_set_virtual_addr_env (m, mi);
1317
}
1318
}
1319
1320
#ifdef ENABLE_PLUGIN
1321
1322
/*
1323
* Called after client-connect plug-in is called
1324
*/
1325
static void
1326
multi_client_connect_post_plugin (struct multi_context *m,
1327
struct multi_instance *mi,
1328
const struct plugin_return *pr,
1329
unsigned int option_permissions_mask,
1330
unsigned int *option_types_found)
1331
{
1332
struct plugin_return config;
1333
1334
plugin_return_get_column (pr, &config, "config");
1335
1336
/* Did script generate a dynamic config file? */
1337
if (plugin_return_defined (&config))
1338
{
1339
int i;
1340
for (i = 0; i < config.n; ++i)
1341
{
1342
if (config.list[i] && config.list[i]->value)
1343
options_string_import (&mi->context.options,
1344
config.list[i]->value,
1345
D_IMPORT_ERRORS|M_OPTERR,
1346
option_permissions_mask,
1347
option_types_found,
1348
mi->context.c2.es);
1349
}
1350
1351
/*
1352
* If the --client-connect script generates a config file
1353
* with an --ifconfig-push directive, it will override any
1354
* --ifconfig-push directive from the --client-config-dir
1355
* directory or any --ifconfig-pool dynamic address.
1356
*/
1357
multi_select_virtual_addr (m, mi);
1358
multi_set_virtual_addr_env (m, mi);
1359
}
1360
}
1361
1362
#endif
1363
1364
#ifdef MANAGEMENT_DEF_AUTH
1365
1366
/*
1367
* Called to load management-derived client-connect config
1368
*/
1369
static void
1370
multi_client_connect_mda (struct multi_context *m,
1371
struct multi_instance *mi,
1372
const struct buffer_list *config,
1373
unsigned int option_permissions_mask,
1374
unsigned int *option_types_found)
1375
{
1376
if (config)
1377
{
1378
struct buffer_entry *be;
1379
1380
for (be = config->head; be != NULL; be = be->next)
1381
{
1382
const char *opt = BSTR(&be->buf);
1383
options_string_import (&mi->context.options,
1384
opt,
1385
D_IMPORT_ERRORS|M_OPTERR,
1386
option_permissions_mask,
1387
option_types_found,
1388
mi->context.c2.es);
1389
}
1390
1391
/*
1392
* If the --client-connect script generates a config file
1393
* with an --ifconfig-push directive, it will override any
1394
* --ifconfig-push directive from the --client-config-dir
1395
* directory or any --ifconfig-pool dynamic address.
1396
*/
1397
multi_select_virtual_addr (m, mi);
1398
multi_set_virtual_addr_env (m, mi);
1399
}
1400
}
1401
1402
#endif
1403
1404
static void
1405
multi_client_connect_setenv (struct multi_context *m,
1406
struct multi_instance *mi)
1407
{
1408
struct gc_arena gc = gc_new ();
1409
1410
/* setenv incoming cert common name for script */
1411
setenv_str (mi->context.c2.es, "common_name", tls_common_name (mi->context.c2.tls_multi, true));
1412
1413
/* setenv client real IP address */
1414
setenv_trusted (mi->context.c2.es, get_link_socket_info (&mi->context));
1415
1416
/* setenv client virtual IP address */
1417
multi_set_virtual_addr_env (m, mi);
1418
1419
/* setenv connection time */
1420
{
1421
const char *created_ascii = time_string (mi->created, 0, false, &gc);
1422
setenv_str (mi->context.c2.es, "time_ascii", created_ascii);
1423
setenv_unsigned (mi->context.c2.es, "time_unix", (unsigned int)mi->created);
1424
}
1425
1426
gc_free (&gc);
1427
}
1428
1429
/*
1430
* Called as soon as the SSL/TLS connection authenticates.
1431
*
1432
* Instance-specific directives to be processed:
1433
*
1434
* iroute start-ip end-ip
1435
* ifconfig-push local remote-netmask
1436
* push
1437
*/
1438
static void
1439
multi_connection_established (struct multi_context *m, struct multi_instance *mi)
1440
{
1441
if (tls_authentication_status (mi->context.c2.tls_multi, 0) == TLS_AUTHENTICATION_SUCCEEDED)
1442
{
1443
struct gc_arena gc = gc_new ();
1444
unsigned int option_types_found = 0;
1445
1446
const unsigned int option_permissions_mask =
1447
OPT_P_INSTANCE
1448
| OPT_P_INHERIT
1449
| OPT_P_PUSH
1450
| OPT_P_TIMER
1451
| OPT_P_CONFIG
1452
| OPT_P_ECHO
1453
| OPT_P_COMP
1454
| OPT_P_SOCKFLAGS;
1455
1456
int cc_succeeded = true; /* client connect script status */
1457
int cc_succeeded_count = 0;
1458
1459
ASSERT (mi->context.c1.tuntap);
1460
1461
/* lock down the common name and cert hashes so they can't change during future TLS renegotiations */
1462
tls_lock_common_name (mi->context.c2.tls_multi);
1463
tls_lock_cert_hash_set (mi->context.c2.tls_multi);
1464
1465
/* generate a msg() prefix for this client instance */
1466
generate_prefix (mi);
1467
1468
/* delete instances of previous clients with same common-name */
1469
if (!mi->context.options.duplicate_cn)
1470
multi_delete_dup (m, mi);
1471
1472
/* reset pool handle to null */
1473
mi->vaddr_handle = -1;
1474
1475
/*
1476
* Try to source a dynamic config file from the
1477
* --client-config-dir directory.
1478
*/
1479
if (mi->context.options.client_config_dir)
1480
{
1481
const char *ccd_file;
1482
1483
ccd_file = gen_path (mi->context.options.client_config_dir,
1484
tls_common_name (mi->context.c2.tls_multi, false),
1485
&gc);
1486
1487
/* try common-name file */
1488
if (test_file (ccd_file))
1489
{
1490
options_server_import (&mi->context.options,
1491
ccd_file,
1492
D_IMPORT_ERRORS|M_OPTERR,
1493
option_permissions_mask,
1494
&option_types_found,
1495
mi->context.c2.es);
1496
}
1497
else /* try default file */
1498
{
1499
ccd_file = gen_path (mi->context.options.client_config_dir,
1500
CCD_DEFAULT,
1501
&gc);
1502
1503
if (test_file (ccd_file))
1504
{
1505
options_server_import (&mi->context.options,
1506
ccd_file,
1507
D_IMPORT_ERRORS|M_OPTERR,
1508
option_permissions_mask,
1509
&option_types_found,
1510
mi->context.c2.es);
1511
}
1512
}
1513
}
1514
1515
/*
1516
* Select a virtual address from either --ifconfig-push in --client-config-dir file
1517
* or --ifconfig-pool.
1518
*/
1519
multi_select_virtual_addr (m, mi);
1520
1521
/* do --client-connect setenvs */
1522
multi_client_connect_setenv (m, mi);
1523
1524
#ifdef ENABLE_PLUGIN
1525
/*
1526
* Call client-connect plug-in.
1527
*/
1528
1529
/* deprecated callback, use a file for passing back return info */
1530
if (plugin_defined (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_CONNECT))
1531
{
1532
struct argv argv = argv_new ();
1533
const char *dc_file = create_temp_filename (mi->context.options.tmp_dir, "cc", &gc);
1534
argv_printf (&argv, "%s", dc_file);
1535
delete_file (dc_file);
1536
if (plugin_call (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_CONNECT, &argv, NULL, mi->context.c2.es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
1537
{
1538
msg (M_WARN, "WARNING: client-connect plugin call failed");
1539
cc_succeeded = false;
1540
}
1541
else
1542
{
1543
multi_client_connect_post (m, mi, dc_file, option_permissions_mask, &option_types_found);
1544
++cc_succeeded_count;
1545
}
1546
argv_reset (&argv);
1547
}
1548
1549
/* V2 callback, use a plugin_return struct for passing back return info */
1550
if (plugin_defined (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_CONNECT_V2))
1551
{
1552
struct plugin_return pr;
1553
1554
plugin_return_init (&pr);
1555
1556
if (plugin_call (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_CONNECT_V2, NULL, &pr, mi->context.c2.es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
1557
{
1558
msg (M_WARN, "WARNING: client-connect-v2 plugin call failed");
1559
cc_succeeded = false;
1560
}
1561
else
1562
{
1563
multi_client_connect_post_plugin (m, mi, &pr, option_permissions_mask, &option_types_found);
1564
++cc_succeeded_count;
1565
}
1566
1567
plugin_return_free (&pr);
1568
}
1569
#endif
1570
1571
/*
1572
* Run --client-connect script.
1573
*/
1574
if (mi->context.options.client_connect_script && cc_succeeded)
1575
{
1576
struct argv argv = argv_new ();
1577
const char *dc_file = NULL;
1578
1579
setenv_str (mi->context.c2.es, "script_type", "client-connect");
1580
1581
dc_file = create_temp_filename (mi->context.options.tmp_dir, "cc", &gc);
1582
1583
delete_file (dc_file);
1584
1585
argv_printf (&argv, "%sc %s",
1586
mi->context.options.client_connect_script,
1587
dc_file);
1588
1589
if (openvpn_execve_check (&argv, mi->context.c2.es, S_SCRIPT, "client-connect command failed"))
1590
{
1591
multi_client_connect_post (m, mi, dc_file, option_permissions_mask, &option_types_found);
1592
++cc_succeeded_count;
1593
}
1594
else
1595
cc_succeeded = false;
1596
1597
argv_reset (&argv);
1598
}
1599
1600
/*
1601
* Check for client-connect script left by management interface client
1602
*/
1603
#ifdef MANAGEMENT_DEF_AUTH
1604
if (cc_succeeded && mi->cc_config)
1605
{
1606
multi_client_connect_mda (m, mi, mi->cc_config, option_permissions_mask, &option_types_found);
1607
++cc_succeeded_count;
1608
}
1609
#endif
1610
1611
/*
1612
* Check for "disable" directive in client-config-dir file
1613
* or config file generated by --client-connect script.
1614
*/
1615
if (mi->context.options.disable)
1616
{
1617
msg (D_MULTI_ERRORS, "MULTI: client has been rejected due to 'disable' directive");
1618
cc_succeeded = false;
1619
}
1620
1621
if (cc_succeeded)
1622
{
1623
/*
1624
* Process sourced options.
1625
*/
1626
do_deferred_options (&mi->context, option_types_found);
1627
1628
/*
1629
* make sure we got ifconfig settings from somewhere
1630
*/
1631
if (!mi->context.c2.push_ifconfig_defined)
1632
{
1633
msg (D_MULTI_ERRORS, "MULTI: no dynamic or static remote --ifconfig address is available for %s",
1634
multi_instance_string (mi, false, &gc));
1635
}
1636
1637
/*
1638
* make sure that ifconfig settings comply with constraints
1639
*/
1640
if (!ifconfig_push_constraint_satisfied (&mi->context))
1641
{
1642
/* JYFIXME -- this should cause the connection to fail */
1643
msg (D_MULTI_ERRORS, "MULTI ERROR: primary virtual IP for %s (%s) violates tunnel network/netmask constraint (%s/%s)",
1644
multi_instance_string (mi, false, &gc),
1645
print_in_addr_t (mi->context.c2.push_ifconfig_local, 0, &gc),
1646
print_in_addr_t (mi->context.options.push_ifconfig_constraint_network, 0, &gc),
1647
print_in_addr_t (mi->context.options.push_ifconfig_constraint_netmask, 0, &gc));
1648
}
1649
1650
/*
1651
* For routed tunnels, set up internal route to endpoint
1652
* plus add all iroute routes.
1653
*/
1654
if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN)
1655
{
1656
if (mi->context.c2.push_ifconfig_defined)
1657
{
1658
multi_learn_in_addr_t (m, mi, mi->context.c2.push_ifconfig_local, -1, true);
1659
msg (D_MULTI_LOW, "MULTI: primary virtual IP for %s: %s",
1660
multi_instance_string (mi, false, &gc),
1661
print_in_addr_t (mi->context.c2.push_ifconfig_local, 0, &gc));
1662
}
1663
1664
/* add routes locally, pointing to new client, if
1665
--iroute options have been specified */
1666
multi_add_iroutes (m, mi);
1667
1668
/*
1669
* iroutes represent subnets which are "owned" by a particular
1670
* client. Therefore, do not actually push a route to a client
1671
* if it matches one of the client's iroutes.
1672
*/
1673
remove_iroutes_from_push_route_list (&mi->context.options);
1674
}
1675
else if (mi->context.options.iroutes)
1676
{
1677
msg (D_MULTI_ERRORS, "MULTI: --iroute options rejected for %s -- iroute only works with tun-style tunnels",
1678
multi_instance_string (mi, false, &gc));
1679
}
1680
1681
/* set our client's VPN endpoint for status reporting purposes */
1682
mi->reporting_addr = mi->context.c2.push_ifconfig_local;
1683
1684
/* set context-level authentication flag */
1685
mi->context.c2.context_auth = CAS_SUCCEEDED;
1686
}
1687
else
1688
{
1689
/* set context-level authentication flag */
1690
mi->context.c2.context_auth = cc_succeeded_count ? CAS_PARTIAL : CAS_FAILED;
1691
}
1692
1693
/* set flag so we don't get called again */
1694
mi->connection_established_flag = true;
1695
1696
/* increment number of current authenticated clients */
1697
++m->n_clients;
1698
--mi->n_clients_delta;
1699
1700
#ifdef MANAGEMENT_DEF_AUTH
1701
if (management)
1702
management_connection_established (management, &mi->context.c2.mda_context, mi->context.c2.es);
1703
#endif
1704
1705
gc_free (&gc);
1706
}
1707
1708
/*
1709
* Reply now to client's PUSH_REQUEST query
1710
*/
1711
mi->context.c2.push_reply_deferred = false;
1712
}
1713
1714
/*
1715
* Add a mbuf buffer to a particular
1716
* instance.
1717
*/
1718
void
1719
multi_add_mbuf (struct multi_context *m,
1720
struct multi_instance *mi,
1721
struct mbuf_buffer *mb)
1722
{
1723
if (multi_output_queue_ready (m, mi))
1724
{
1725
struct mbuf_item item;
1726
item.buffer = mb;
1727
item.instance = mi;
1728
mbuf_add_item (m->mbuf, &item);
1729
}
1730
else
1731
{
1732
msg (D_MULTI_DROPPED, "MULTI: packet dropped due to output saturation (multi_add_mbuf)");
1733
}
1734
}
1735
1736
/*
1737
* Add a packet to a client instance output queue.
1738
*/
1739
static inline void
1740
multi_unicast (struct multi_context *m,
1741
const struct buffer *buf,
1742
struct multi_instance *mi)
1743
{
1744
struct mbuf_buffer *mb;
1745
1746
if (BLEN (buf) > 0)
1747
{
1748
mb = mbuf_alloc_buf (buf);
1749
mb->flags = MF_UNICAST;
1750
multi_add_mbuf (m, mi, mb);
1751
mbuf_free_buf (mb);
1752
}
1753
}
1754
1755
/*
1756
* Broadcast a packet to all clients.
1757
*/
1758
static void
1759
multi_bcast (struct multi_context *m,
1760
const struct buffer *buf,
1761
const struct multi_instance *sender_instance,
1762
const struct mroute_addr *sender_addr)
1763
{
1764
struct hash_iterator hi;
1765
struct hash_element *he;
1766
struct multi_instance *mi;
1767
struct mbuf_buffer *mb;
1768
1769
if (BLEN (buf) > 0)
1770
{
1771
perf_push (PERF_MULTI_BCAST);
1772
#ifdef MULTI_DEBUG_EVENT_LOOP
1773
printf ("BCAST len=%d\n", BLEN (buf));
1774
#endif
1775
mb = mbuf_alloc_buf (buf);
1776
hash_iterator_init (m->iter, &hi, true);
1777
1778
while ((he = hash_iterator_next (&hi)))
1779
{
1780
mi = (struct multi_instance *) he->value;
1781
if (mi != sender_instance && !mi->halt)
1782
{
1783
#ifdef ENABLE_PF
1784
if (sender_instance)
1785
{
1786
if (!pf_c2c_test (&sender_instance->context, &mi->context, "bcast_c2c"))
1787
{
1788
msg (D_PF_DROPPED_BCAST, "PF: client[%s] -> client[%s] packet dropped by BCAST packet filter",
1789
mi_prefix (sender_instance),
1790
mi_prefix (mi));
1791
continue;
1792
}
1793
}
1794
if (sender_addr)
1795
{
1796
if (!pf_addr_test (&mi->context, sender_addr, "bcast_src_addr"))
1797
{
1798
struct gc_arena gc = gc_new ();
1799
msg (D_PF_DROPPED_BCAST, "PF: addr[%s] -> client[%s] packet dropped by BCAST packet filter",
1800
mroute_addr_print_ex (sender_addr, MAPF_SHOW_ARP, &gc),
1801
mi_prefix (mi));
1802
gc_free (&gc);
1803
continue;
1804
}
1805
}
1806
#endif
1807
multi_add_mbuf (m, mi, mb);
1808
}
1809
}
1810
1811
hash_iterator_free (&hi);
1812
mbuf_free_buf (mb);
1813
perf_pop ();
1814
}
1815
}
1816
1817
/*
1818
* Given a time delta, indicating that we wish to be
1819
* awoken by the scheduler at time now + delta, figure
1820
* a sigma parameter (in microseconds) that represents
1821
* a sort of fuzz factor around delta, so that we're
1822
* really telling the scheduler to wake us up any time
1823
* between now + delta - sigma and now + delta + sigma.
1824
*
1825
* The sigma parameter helps the scheduler to run more efficiently.
1826
* Sigma should be no larger than TV_WITHIN_SIGMA_MAX_USEC
1827
*/
1828
static inline unsigned int
1829
compute_wakeup_sigma (const struct timeval *delta)
1830
{
1831
if (delta->tv_sec < 1)
1832
{
1833
/* if < 1 sec, fuzz = # of microseconds / 8 */
1834
return delta->tv_usec >> 3;
1835
}
1836
else
1837
{
1838
/* if < 10 minutes, fuzz = 13.1% of timeout */
1839
if (delta->tv_sec < 600)
1840
return delta->tv_sec << 17;
1841
else
1842
return 120000000; /* if >= 10 minutes, fuzz = 2 minutes */
1843
}
1844
}
1845
1846
/*
1847
* Figure instance-specific timers, convert
1848
* earliest to absolute time in mi->wakeup,
1849
* call scheduler with our future wakeup time.
1850
*
1851
* Also close context on signal.
1852
*/
1853
bool
1854
multi_process_post (struct multi_context *m, struct multi_instance *mi, const unsigned int flags)
1855
{
1856
bool ret = true;
1857
1858
if (!IS_SIG (&mi->context) && ((flags & MPP_PRE_SELECT) || ((flags & MPP_CONDITIONAL_PRE_SELECT) && !ANY_OUT (&mi->context))))
1859
{
1860
/* figure timeouts and fetch possible outgoing
1861
to_link packets (such as ping or TLS control) */
1862
pre_select (&mi->context);
1863
1864
if (!IS_SIG (&mi->context))
1865
{
1866
/* calculate an absolute wakeup time */
1867
ASSERT (!openvpn_gettimeofday (&mi->wakeup, NULL));
1868
tv_add (&mi->wakeup, &mi->context.c2.timeval);
1869
1870
/* tell scheduler to wake us up at some point in the future */
1871
schedule_add_entry (m->schedule,
1872
(struct schedule_entry *) mi,
1873
&mi->wakeup,
1874
compute_wakeup_sigma (&mi->context.c2.timeval));
1875
1876
/* connection is "established" when SSL/TLS key negotiation succeeds
1877
and (if specified) auth user/pass succeeds */
1878
if (!mi->connection_established_flag && CONNECTION_ESTABLISHED (&mi->context))
1879
multi_connection_established (m, mi);
1880
}
1881
}
1882
1883
if (IS_SIG (&mi->context))
1884
{
1885
if (flags & MPP_CLOSE_ON_SIGNAL)
1886
{
1887
multi_close_instance_on_signal (m, mi);
1888
ret = false;
1889
}
1890
}
1891
else
1892
{
1893
/* continue to pend on output? */
1894
multi_set_pending (m, ANY_OUT (&mi->context) ? mi : NULL);
1895
1896
#ifdef MULTI_DEBUG_EVENT_LOOP
1897
printf ("POST %s[%d] to=%d lo=%d/%d w=%d/%d\n",
1898
id(mi),
1899
(int) (mi == m->pending),
1900
mi ? mi->context.c2.to_tun.len : -1,
1901
mi ? mi->context.c2.to_link.len : -1,
1902
(mi && mi->context.c2.fragment) ? mi->context.c2.fragment->outgoing.len : -1,
1903
(int)mi->context.c2.timeval.tv_sec,
1904
(int)mi->context.c2.timeval.tv_usec);
1905
#endif
1906
}
1907
1908
if ((flags & MPP_RECORD_TOUCH) && m->mpp_touched)
1909
*m->mpp_touched = mi;
1910
1911
return ret;
1912
}
1913
1914
/*
1915
* Process packets in the TCP/UDP socket -> TUN/TAP interface direction,
1916
* i.e. client -> server direction.
1917
*/
1918
bool
1919
multi_process_incoming_link (struct multi_context *m, struct multi_instance *instance, const unsigned int mpp_flags)
1920
{
1921
struct gc_arena gc = gc_new ();
1922
1923
struct context *c;
1924
struct mroute_addr src, dest;
1925
unsigned int mroute_flags;
1926
struct multi_instance *mi;
1927
bool ret = true;
1928
1929
if (m->pending)
1930
return true;
1931
1932
if (!instance)
1933
{
1934
#ifdef MULTI_DEBUG_EVENT_LOOP
1935
printf ("TCP/UDP -> TUN [%d]\n", BLEN (&m->top.c2.buf));
1936
#endif
1937
multi_set_pending (m, multi_get_create_instance_udp (m));
1938
}
1939
else
1940
multi_set_pending (m, instance);
1941
1942
if (m->pending)
1943
{
1944
set_prefix (m->pending);
1945
1946
/* get instance context */
1947
c = &m->pending->context;
1948
1949
if (!instance)
1950
{
1951
/* transfer packet pointer from top-level context buffer to instance */
1952
c->c2.buf = m->top.c2.buf;
1953
1954
/* transfer from-addr from top-level context buffer to instance */
1955
c->c2.from = m->top.c2.from;
1956
}
1957
1958
if (BLEN (&c->c2.buf) > 0)
1959
{
1960
/* decrypt in instance context */
1961
process_incoming_link (c);
1962
1963
if (TUNNEL_TYPE (m->top.c1.tuntap) == DEV_TYPE_TUN)
1964
{
1965
/* extract packet source and dest addresses */
1966
mroute_flags = mroute_extract_addr_from_packet (&src,
1967
&dest,
1968
NULL,
1969
NULL,
1970
&c->c2.to_tun,
1971
DEV_TYPE_TUN);
1972
1973
/* drop packet if extract failed */
1974
if (!(mroute_flags & MROUTE_EXTRACT_SUCCEEDED))
1975
{
1976
c->c2.to_tun.len = 0;
1977
}
1978
/* make sure that source address is associated with this client */
1979
else if (multi_get_instance_by_virtual_addr (m, &src, true) != m->pending)
1980
{
1981
msg (D_MULTI_DROPPED, "MULTI: bad source address from client [%s], packet dropped",
1982
mroute_addr_print (&src, &gc));
1983
c->c2.to_tun.len = 0;
1984
}
1985
/* client-to-client communication enabled? */
1986
else if (m->enable_c2c)
1987
{
1988
/* multicast? */
1989
if (mroute_flags & MROUTE_EXTRACT_MCAST)
1990
{
1991
/* for now, treat multicast as broadcast */
1992
multi_bcast (m, &c->c2.to_tun, m->pending, NULL);
1993
}
1994
else /* possible client to client routing */
1995
{
1996
ASSERT (!(mroute_flags & MROUTE_EXTRACT_BCAST));
1997
mi = multi_get_instance_by_virtual_addr (m, &dest, true);
1998
1999
/* if dest addr is a known client, route to it */
2000
if (mi)
2001
{
2002
#ifdef ENABLE_PF
2003
if (!pf_c2c_test (c, &mi->context, "tun_c2c"))
2004
{
2005
msg (D_PF_DROPPED, "PF: client -> client[%s] packet dropped by TUN packet filter",
2006
mi_prefix (mi));
2007
}
2008
else
2009
#endif
2010
{
2011
multi_unicast (m, &c->c2.to_tun, mi);
2012
register_activity (c, BLEN(&c->c2.to_tun));
2013
}
2014
c->c2.to_tun.len = 0;
2015
}
2016
}
2017
}
2018
#ifdef ENABLE_PF
2019
if (c->c2.to_tun.len && !pf_addr_test (c, &dest, "tun_dest_addr"))
2020
{
2021
msg (D_PF_DROPPED, "PF: client -> addr[%s] packet dropped by TUN packet filter",
2022
mroute_addr_print_ex (&dest, MAPF_SHOW_ARP, &gc));
2023
c->c2.to_tun.len = 0;
2024
}
2025
#endif
2026
}
2027
else if (TUNNEL_TYPE (m->top.c1.tuntap) == DEV_TYPE_TAP)
2028
{
2029
#ifdef ENABLE_PF
2030
struct mroute_addr edest;
2031
mroute_addr_reset (&edest);
2032
#endif
2033
/* extract packet source and dest addresses */
2034
mroute_flags = mroute_extract_addr_from_packet (&src,
2035
&dest,
2036
NULL,
2037
#ifdef ENABLE_PF
2038
&edest,
2039
#else
2040
NULL,
2041
#endif
2042
&c->c2.to_tun,
2043
DEV_TYPE_TAP);
2044
2045
if (mroute_flags & MROUTE_EXTRACT_SUCCEEDED)
2046
{
2047
if (multi_learn_addr (m, m->pending, &src, 0) == m->pending)
2048
{
2049
/* check for broadcast */
2050
if (m->enable_c2c)
2051
{
2052
if (mroute_flags & (MROUTE_EXTRACT_BCAST|MROUTE_EXTRACT_MCAST))
2053
{
2054
multi_bcast (m, &c->c2.to_tun, m->pending, NULL);
2055
}
2056
else /* try client-to-client routing */
2057
{
2058
mi = multi_get_instance_by_virtual_addr (m, &dest, false);
2059
2060
/* if dest addr is a known client, route to it */
2061
if (mi)
2062
{
2063
#ifdef ENABLE_PF
2064
if (!pf_c2c_test (c, &mi->context, "tap_c2c"))
2065
{
2066
msg (D_PF_DROPPED, "PF: client -> client[%s] packet dropped by TAP packet filter",
2067
mi_prefix (mi));
2068
}
2069
else
2070
#endif
2071
{
2072
multi_unicast (m, &c->c2.to_tun, mi);
2073
register_activity (c, BLEN(&c->c2.to_tun));
2074
}
2075
c->c2.to_tun.len = 0;
2076
}
2077
}
2078
}
2079
#ifdef ENABLE_PF
2080
if (c->c2.to_tun.len && !pf_addr_test (c, &edest, "tap_dest_addr"))
2081
{
2082
msg (D_PF_DROPPED, "PF: client -> addr[%s] packet dropped by TAP packet filter",
2083
mroute_addr_print_ex (&edest, MAPF_SHOW_ARP, &gc));
2084
c->c2.to_tun.len = 0;
2085
}
2086
#endif
2087
}
2088
else
2089
{
2090
msg (D_MULTI_DROPPED, "MULTI: bad source address from client [%s], packet dropped",
2091
mroute_addr_print (&src, &gc));
2092
c->c2.to_tun.len = 0;
2093
}
2094
}
2095
else
2096
{
2097
c->c2.to_tun.len = 0;
2098
}
2099
}
2100
}
2101
2102
/* postprocess and set wakeup */
2103
ret = multi_process_post (m, m->pending, mpp_flags);
2104
2105
clear_prefix ();
2106
}
2107
2108
gc_free (&gc);
2109
return ret;
2110
}
2111
2112
/*
2113
* Process packets in the TUN/TAP interface -> TCP/UDP socket direction,
2114
* i.e. server -> client direction.
2115
*/
2116
bool
2117
multi_process_incoming_tun (struct multi_context *m, const unsigned int mpp_flags)
2118
{
2119
struct gc_arena gc = gc_new ();
2120
bool ret = true;
2121
2122
if (BLEN (&m->top.c2.buf) > 0)
2123
{
2124
unsigned int mroute_flags;
2125
struct mroute_addr src, dest;
2126
const int dev_type = TUNNEL_TYPE (m->top.c1.tuntap);
2127
2128
#ifdef ENABLE_PF
2129
struct mroute_addr esrc, *e1, *e2;
2130
if (dev_type == DEV_TYPE_TUN)
2131
{
2132
e1 = NULL;
2133
e2 = &src;
2134
}
2135
else
2136
{
2137
e1 = e2 = &esrc;
2138
mroute_addr_reset (&esrc);
2139
}
2140
#endif
2141
2142
#ifdef MULTI_DEBUG_EVENT_LOOP
2143
printf ("TUN -> TCP/UDP [%d]\n", BLEN (&m->top.c2.buf));
2144
#endif
2145
2146
if (m->pending)
2147
return true;
2148
2149
/*
2150
* Route an incoming tun/tap packet to
2151
* the appropriate multi_instance object.
2152
*/
2153
2154
mroute_flags = mroute_extract_addr_from_packet (&src,
2155
&dest,
2156
#ifdef ENABLE_PF
2157
e1,
2158
#else
2159
NULL,
2160
#endif
2161
NULL,
2162
&m->top.c2.buf,
2163
dev_type);
2164
2165
if (mroute_flags & MROUTE_EXTRACT_SUCCEEDED)
2166
{
2167
struct context *c;
2168
2169
/* broadcast or multicast dest addr? */
2170
if (mroute_flags & (MROUTE_EXTRACT_BCAST|MROUTE_EXTRACT_MCAST))
2171
{
2172
/* for now, treat multicast as broadcast */
2173
#ifdef ENABLE_PF
2174
multi_bcast (m, &m->top.c2.buf, NULL, e2);
2175
#else
2176
multi_bcast (m, &m->top.c2.buf, NULL, NULL);
2177
#endif
2178
}
2179
else
2180
{
2181
multi_set_pending (m, multi_get_instance_by_virtual_addr (m, &dest, dev_type == DEV_TYPE_TUN));
2182
2183
if (m->pending)
2184
{
2185
/* get instance context */
2186
c = &m->pending->context;
2187
2188
set_prefix (m->pending);
2189
2190
#ifdef ENABLE_PF
2191
if (!pf_addr_test (c, e2, "tun_tap_src_addr"))
2192
{
2193
msg (D_PF_DROPPED, "PF: addr[%s] -> client packet dropped by packet filter",
2194
mroute_addr_print_ex (&src, MAPF_SHOW_ARP, &gc));
2195
buf_reset_len (&c->c2.buf);
2196
}
2197
else
2198
#endif
2199
{
2200
if (multi_output_queue_ready (m, m->pending))
2201
{
2202
/* transfer packet pointer from top-level context buffer to instance */
2203
c->c2.buf = m->top.c2.buf;
2204
}
2205
else
2206
{
2207
/* drop packet */
2208
msg (D_MULTI_DROPPED, "MULTI: packet dropped due to output saturation (multi_process_incoming_tun)");
2209
buf_reset_len (&c->c2.buf);
2210
}
2211
}
2212
2213
/* encrypt in instance context */
2214
process_incoming_tun (c);
2215
2216
/* postprocess and set wakeup */
2217
ret = multi_process_post (m, m->pending, mpp_flags);
2218
2219
clear_prefix ();
2220
}
2221
}
2222
}
2223
}
2224
gc_free (&gc);
2225
return ret;
2226
}
2227
2228
/*
2229
* Process a possible client-to-client/bcast/mcast message in the
2230
* queue.
2231
*/
2232
struct multi_instance *
2233
multi_get_queue (struct mbuf_set *ms)
2234
{
2235
struct mbuf_item item;
2236
2237
if (mbuf_extract_item (ms, &item, true)) /* cleartext IP packet */
2238
{
2239
unsigned int pipv4_flags = PIPV4_PASSTOS;
2240
2241
set_prefix (item.instance);
2242
item.instance->context.c2.buf = item.buffer->buf;
2243
if (item.buffer->flags & MF_UNICAST) /* --mssfix doesn't make sense for broadcast or multicast */
2244
pipv4_flags |= PIPV4_MSSFIX;
2245
process_ipv4_header (&item.instance->context, pipv4_flags, &item.instance->context.c2.buf);
2246
encrypt_sign (&item.instance->context, true);
2247
mbuf_free_buf (item.buffer);
2248
2249
dmsg (D_MULTI_DEBUG, "MULTI: C2C/MCAST/BCAST");
2250
2251
clear_prefix ();
2252
return item.instance;
2253
}
2254
else
2255
{
2256
return NULL;
2257
}
2258
}
2259
2260
/*
2261
* Called when an I/O wait times out. Usually means that a particular
2262
* client instance object needs timer-based service.
2263
*/
2264
bool
2265
multi_process_timeout (struct multi_context *m, const unsigned int mpp_flags)
2266
{
2267
bool ret = true;
2268
2269
#ifdef MULTI_DEBUG_EVENT_LOOP
2270
printf ("%s -> TIMEOUT\n", id(m->earliest_wakeup));
2271
#endif
2272
2273
/* instance marked for wakeup? */
2274
if (m->earliest_wakeup)
2275
{
2276
set_prefix (m->earliest_wakeup);
2277
ret = multi_process_post (m, m->earliest_wakeup, mpp_flags);
2278
m->earliest_wakeup = NULL;
2279
clear_prefix ();
2280
}
2281
return ret;
2282
}
2283
2284
/*
2285
* Drop a TUN/TAP outgoing packet..
2286
*/
2287
void
2288
multi_process_drop_outgoing_tun (struct multi_context *m, const unsigned int mpp_flags)
2289
{
2290
struct multi_instance *mi = m->pending;
2291
2292
ASSERT (mi);
2293
2294
set_prefix (mi);
2295
2296
msg (D_MULTI_ERRORS, "MULTI: Outgoing TUN queue full, dropped packet len=%d",
2297
mi->context.c2.to_tun.len);
2298
2299
buf_reset (&mi->context.c2.to_tun);
2300
2301
multi_process_post (m, mi, mpp_flags);
2302
clear_prefix ();
2303
}
2304
2305
/*
2306
* Per-client route quota management
2307
*/
2308
2309
void
2310
route_quota_exceeded (const struct multi_context *m, const struct multi_instance *mi)
2311
{
2312
struct gc_arena gc = gc_new ();
2313
msg (D_ROUTE_QUOTA, "MULTI ROUTE: route quota (%d) exceeded for %s (see --max-routes-per-client option)",
2314
mi->context.options.max_routes_per_client,
2315
multi_instance_string (mi, false, &gc));
2316
gc_free (&gc);
2317
}
2318
2319
#ifdef ENABLE_DEBUG
2320
/*
2321
* Flood clients with random packets
2322
*/
2323
static void
2324
gremlin_flood_clients (struct multi_context *m)
2325
{
2326
const int level = GREMLIN_PACKET_FLOOD_LEVEL (m->top.options.gremlin);
2327
if (level)
2328
{
2329
struct gc_arena gc = gc_new ();
2330
struct buffer buf = alloc_buf_gc (BUF_SIZE (&m->top.c2.frame), &gc);
2331
struct packet_flood_parms parm = get_packet_flood_parms (level);
2332
int i;
2333
2334
ASSERT (buf_init (&buf, FRAME_HEADROOM (&m->top.c2.frame)));
2335
parm.packet_size = min_int (parm.packet_size, MAX_RW_SIZE_TUN (&m->top.c2.frame));
2336
2337
msg (D_GREMLIN, "GREMLIN_FLOOD_CLIENTS: flooding clients with %d packets of size %d",
2338
parm.n_packets,
2339
parm.packet_size);
2340
2341
for (i = 0; i < parm.packet_size; ++i)
2342
ASSERT (buf_write_u8 (&buf, get_random () & 0xFF));
2343
2344
for (i = 0; i < parm.n_packets; ++i)
2345
multi_bcast (m, &buf, NULL, NULL);
2346
2347
gc_free (&gc);
2348
}
2349
}
2350
#endif
2351
2352
/*
2353
* Process timers in the top-level context
2354
*/
2355
void
2356
multi_process_per_second_timers_dowork (struct multi_context *m)
2357
{
2358
/* possibly reap instances/routes in vhash */
2359
multi_reap_process (m);
2360
2361
/* possibly print to status log */
2362
if (m->top.c1.status_output)
2363
{
2364
if (status_trigger (m->top.c1.status_output))
2365
multi_print_status (m, m->top.c1.status_output, m->status_file_version);
2366
}
2367
2368
/* possibly flush ifconfig-pool file */
2369
multi_ifconfig_pool_persist (m, false);
2370
2371
#ifdef ENABLE_DEBUG
2372
gremlin_flood_clients (m);
2373
#endif
2374
}
2375
2376
void
2377
multi_top_init (struct multi_context *m, const struct context *top, const bool alloc_buffers)
2378
{
2379
inherit_context_top (&m->top, top);
2380
m->top.c2.buffers = NULL;
2381
if (alloc_buffers)
2382
m->top.c2.buffers = init_context_buffers (&top->c2.frame);
2383
}
2384
2385
void
2386
multi_top_free (struct multi_context *m)
2387
{
2388
close_context (&m->top, -1, CC_GC_FREE);
2389
free_context_buffers (m->top.c2.buffers);
2390
}
2391
2392
/*
2393
* Return true if event loop should break,
2394
* false if it should continue.
2395
*/
2396
bool
2397
multi_process_signal (struct multi_context *m)
2398
{
2399
if (m->top.sig->signal_received == SIGUSR2)
2400
{
2401
struct status_output *so = status_open (NULL, 0, M_INFO, NULL, 0);
2402
multi_print_status (m, so, m->status_file_version);
2403
status_close (so);
2404
m->top.sig->signal_received = 0;
2405
return false;
2406
}
2407
return true;
2408
}
2409
2410
/*
2411
* Called when an instance should be closed due to the
2412
* reception of a soft signal.
2413
*/
2414
void
2415
multi_close_instance_on_signal (struct multi_context *m, struct multi_instance *mi)
2416
{
2417
remap_signal (&mi->context);
2418
set_prefix (mi);
2419
print_signal (mi->context.sig, "client-instance", D_MULTI_LOW);
2420
clear_prefix ();
2421
multi_close_instance (m, mi, false);
2422
}
2423
2424
static void
2425
multi_signal_instance (struct multi_context *m, struct multi_instance *mi, const int sig)
2426
{
2427
mi->context.sig->signal_received = sig;
2428
multi_close_instance_on_signal (m, mi);
2429
}
2430
2431
/*
2432
* Management subsystem callbacks
2433
*/
2434
2435
#ifdef ENABLE_MANAGEMENT
2436
2437
static void
2438
management_callback_status (void *arg, const int version, struct status_output *so)
2439
{
2440
struct multi_context *m = (struct multi_context *) arg;
2441
2442
if (!version)
2443
multi_print_status (m, so, m->status_file_version);
2444
else
2445
multi_print_status (m, so, version);
2446
}
2447
2448
static int
2449
management_callback_n_clients (void *arg)
2450
{
2451
struct multi_context *m = (struct multi_context *) arg;
2452
return m->n_clients;
2453
}
2454
2455
static int
2456
management_callback_kill_by_cn (void *arg, const char *del_cn)
2457
{
2458
struct multi_context *m = (struct multi_context *) arg;
2459
struct hash_iterator hi;
2460
struct hash_element *he;
2461
int count = 0;
2462
2463
hash_iterator_init (m->iter, &hi, true);
2464
while ((he = hash_iterator_next (&hi)))
2465
{
2466
struct multi_instance *mi = (struct multi_instance *) he->value;
2467
if (!mi->halt)
2468
{
2469
const char *cn = tls_common_name (mi->context.c2.tls_multi, false);
2470
if (cn && !strcmp (cn, del_cn))
2471
{
2472
multi_signal_instance (m, mi, SIGTERM);
2473
++count;
2474
}
2475
}
2476
}
2477
hash_iterator_free (&hi);
2478
return count;
2479
}
2480
2481
static int
2482
management_callback_kill_by_addr (void *arg, const in_addr_t addr, const int port)
2483
{
2484
struct multi_context *m = (struct multi_context *) arg;
2485
struct hash_iterator hi;
2486
struct hash_element *he;
2487
struct openvpn_sockaddr saddr;
2488
struct mroute_addr maddr;
2489
int count = 0;
2490
2491
CLEAR (saddr);
2492
saddr.sa.sin_family = AF_INET;
2493
saddr.sa.sin_addr.s_addr = htonl (addr);
2494
saddr.sa.sin_port = htons (port);
2495
if (mroute_extract_openvpn_sockaddr (&maddr, &saddr, true))
2496
{
2497
hash_iterator_init (m->iter, &hi, true);
2498
while ((he = hash_iterator_next (&hi)))
2499
{
2500
struct multi_instance *mi = (struct multi_instance *) he->value;
2501
if (!mi->halt && mroute_addr_equal (&maddr, &mi->real))
2502
{
2503
multi_signal_instance (m, mi, SIGTERM);
2504
++count;
2505
}
2506
}
2507
hash_iterator_free (&hi);
2508
}
2509
return count;
2510
}
2511
2512
static void
2513
management_delete_event (void *arg, event_t event)
2514
{
2515
struct multi_context *m = (struct multi_context *) arg;
2516
if (m->mtcp)
2517
multi_tcp_delete_event (m->mtcp, event);
2518
}
2519
2520
#endif
2521
2522
#ifdef MANAGEMENT_DEF_AUTH
2523
2524
static struct multi_instance *
2525
lookup_by_cid (struct multi_context *m, const unsigned long cid)
2526
{
2527
if (m)
2528
{
2529
struct multi_instance *mi = (struct multi_instance *) hash_lookup (m->cid_hash, &cid);
2530
if (mi && !mi->halt)
2531
return mi;
2532
}
2533
return NULL;
2534
}
2535
2536
static bool
2537
management_kill_by_cid (void *arg, const unsigned long cid)
2538
{
2539
struct multi_context *m = (struct multi_context *) arg;
2540
struct multi_instance *mi = lookup_by_cid (m, cid);
2541
if (mi)
2542
{
2543
send_restart (&mi->context); /* was: multi_signal_instance (m, mi, SIGTERM); */
2544
return true;
2545
}
2546
else
2547
return false;
2548
}
2549
2550
static bool
2551
management_client_auth (void *arg,
2552
const unsigned long cid,
2553
const unsigned int mda_key_id,
2554
const bool auth,
2555
const char *reason,
2556
const char *client_reason,
2557
struct buffer_list *cc_config) /* ownership transferred */
2558
{
2559
struct multi_context *m = (struct multi_context *) arg;
2560
struct multi_instance *mi = lookup_by_cid (m, cid);
2561
bool cc_config_owned = true;
2562
bool ret = false;
2563
2564
if (mi)
2565
{
2566
ret = tls_authenticate_key (mi->context.c2.tls_multi, mda_key_id, auth, client_reason);
2567
if (ret)
2568
{
2569
if (auth && !mi->connection_established_flag)
2570
{
2571
set_cc_config (mi, cc_config);
2572
cc_config_owned = false;
2573
}
2574
if (!auth && reason)
2575
msg (D_MULTI_LOW, "MULTI: connection rejected: %s, CLI:%s", reason, np(client_reason));
2576
}
2577
}
2578
if (cc_config_owned && cc_config)
2579
buffer_list_free (cc_config);
2580
return ret;
2581
}
2582
#endif
2583
2584
#ifdef MANAGEMENT_PF
2585
static bool
2586
management_client_pf (void *arg,
2587
const unsigned long cid,
2588
struct buffer_list *pf_config) /* ownership transferred */
2589
{
2590
struct multi_context *m = (struct multi_context *) arg;
2591
struct multi_instance *mi = lookup_by_cid (m, cid);
2592
bool ret = false;
2593
2594
if (mi && pf_config)
2595
ret = pf_load_from_buffer_list (&mi->context, pf_config);
2596
2597
if (pf_config)
2598
buffer_list_free (pf_config);
2599
return ret;
2600
}
2601
#endif
2602
2603
void
2604
init_management_callback_multi (struct multi_context *m)
2605
{
2606
#ifdef ENABLE_MANAGEMENT
2607
if (management)
2608
{
2609
struct management_callback cb;
2610
CLEAR (cb);
2611
cb.arg = m;
2612
cb.flags = MCF_SERVER;
2613
cb.status = management_callback_status;
2614
cb.show_net = management_show_net_callback;
2615
cb.kill_by_cn = management_callback_kill_by_cn;
2616
cb.kill_by_addr = management_callback_kill_by_addr;
2617
cb.delete_event = management_delete_event;
2618
cb.n_clients = management_callback_n_clients;
2619
#ifdef MANAGEMENT_DEF_AUTH
2620
cb.kill_by_cid = management_kill_by_cid;
2621
cb.client_auth = management_client_auth;
2622
#endif
2623
#ifdef MANAGEMENT_PF
2624
cb.client_pf = management_client_pf;
2625
#endif
2626
management_set_callback (management, &cb);
2627
}
2628
#endif
2629
}
2630
2631
void
2632
uninit_management_callback_multi (struct multi_context *m)
2633
{
2634
uninit_management_callback ();
2635
}
2636
2637
/*
2638
* Top level event loop.
2639
*/
2640
void
2641
tunnel_server (struct context *top)
2642
{
2643
ASSERT (top->options.mode == MODE_SERVER);
2644
2645
switch (top->options.ce.proto) {
2646
case PROTO_UDPv4:
2647
tunnel_server_udp (top);
2648
break;
2649
case PROTO_TCPv4_SERVER:
2650
tunnel_server_tcp (top);
2651
break;
2652
default:
2653
ASSERT (0);
2654
}
2655
}
2656
2657
#else
2658
static void dummy(void) {}
2659
#endif /* P2MP_SERVER */
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