forked from CyanogenMod/android_external_openvpn
-
Notifications
You must be signed in to change notification settings - Fork 0
/
multi.c
2692 lines (2354 loc) · 70.2 KB
/
multi.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "syshead.h"
#if P2MP_SERVER
#include "multi.h"
#include "push.h"
#include "misc.h"
#include "otime.h"
#include "gremlin.h"
#include "memdbg.h"
#include "forward-inline.h"
#include "pf-inline.h"
/*#define MULTI_DEBUG_EVENT_LOOP*/
#ifdef MULTI_DEBUG_EVENT_LOOP
static const char *
id (struct multi_instance *mi)
{
if (mi)
return tls_common_name (mi->context.c2.tls_multi, false);
else
return "NULL";
}
#endif
#ifdef MANAGEMENT_DEF_AUTH
static void
set_cc_config (struct multi_instance *mi, struct buffer_list *cc_config)
{
if (mi->cc_config)
buffer_list_free (mi->cc_config);
mi->cc_config = cc_config;
}
#endif
static bool
learn_address_script (const struct multi_context *m,
const struct multi_instance *mi,
const char *op,
const struct mroute_addr *addr)
{
struct gc_arena gc = gc_new ();
struct env_set *es;
bool ret = true;
struct plugin_list *plugins;
/* get environmental variable source */
if (mi && mi->context.c2.es)
es = mi->context.c2.es;
else
es = env_set_create (&gc);
/* get plugin source */
if (mi)
plugins = mi->context.plugins;
else
plugins = m->top.plugins;
if (plugin_defined (plugins, OPENVPN_PLUGIN_LEARN_ADDRESS))
{
struct argv argv = argv_new ();
argv_printf (&argv, "%s %s",
op,
mroute_addr_print (addr, &gc));
if (mi)
argv_printf_cat (&argv, "%s", tls_common_name (mi->context.c2.tls_multi, false));
if (plugin_call (plugins, OPENVPN_PLUGIN_LEARN_ADDRESS, &argv, NULL, es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
{
msg (M_WARN, "WARNING: learn-address plugin call failed");
ret = false;
}
argv_reset (&argv);
}
if (m->top.options.learn_address_script)
{
struct argv argv = argv_new ();
setenv_str (es, "script_type", "learn-address");
argv_printf (&argv, "%sc %s %s",
m->top.options.learn_address_script,
op,
mroute_addr_print (addr, &gc));
if (mi)
argv_printf_cat (&argv, "%s", tls_common_name (mi->context.c2.tls_multi, false));
if (!openvpn_execve_check (&argv, es, S_SCRIPT, "WARNING: learn-address command failed"))
ret = false;
argv_reset (&argv);
}
gc_free (&gc);
return ret;
}
void
multi_ifconfig_pool_persist (struct multi_context *m, bool force)
{
/* write pool data to file */
if (m->ifconfig_pool
&& m->top.c1.ifconfig_pool_persist
&& (force || ifconfig_pool_write_trigger (m->top.c1.ifconfig_pool_persist)))
{
ifconfig_pool_write (m->top.c1.ifconfig_pool_persist, m->ifconfig_pool);
}
}
static void
multi_reap_range (const struct multi_context *m,
int start_bucket,
int end_bucket)
{
struct gc_arena gc = gc_new ();
struct hash_iterator hi;
struct hash_element *he;
if (start_bucket < 0)
{
start_bucket = 0;
end_bucket = hash_n_buckets (m->vhash);
}
dmsg (D_MULTI_DEBUG, "MULTI: REAP range %d -> %d", start_bucket, end_bucket);
hash_iterator_init_range (m->vhash, &hi, true, start_bucket, end_bucket);
while ((he = hash_iterator_next (&hi)) != NULL)
{
struct multi_route *r = (struct multi_route *) he->value;
if (!multi_route_defined (m, r))
{
dmsg (D_MULTI_DEBUG, "MULTI: REAP DEL %s",
mroute_addr_print (&r->addr, &gc));
learn_address_script (m, NULL, "delete", &r->addr);
multi_route_del (r);
hash_iterator_delete_element (&hi);
}
}
hash_iterator_free (&hi);
gc_free (&gc);
}
static void
multi_reap_all (const struct multi_context *m)
{
multi_reap_range (m, -1, 0);
}
static struct multi_reap *
multi_reap_new (int buckets_per_pass)
{
struct multi_reap *mr;
ALLOC_OBJ (mr, struct multi_reap);
mr->bucket_base = 0;
mr->buckets_per_pass = buckets_per_pass;
mr->last_call = now;
return mr;
}
void
multi_reap_process_dowork (const struct multi_context *m)
{
struct multi_reap *mr = m->reaper;
if (mr->bucket_base >= hash_n_buckets (m->vhash))
mr->bucket_base = 0;
multi_reap_range (m, mr->bucket_base, mr->bucket_base + mr->buckets_per_pass);
mr->bucket_base += mr->buckets_per_pass;
mr->last_call = now;
}
static void
multi_reap_free (struct multi_reap *mr)
{
free (mr);
}
/*
* How many buckets in vhash to reap per pass.
*/
static int
reap_buckets_per_pass (int n_buckets)
{
return constrain_int (n_buckets / REAP_DIVISOR, REAP_MIN, REAP_MAX);
}
#ifdef MANAGEMENT_DEF_AUTH
static uint32_t
cid_hash_function (const void *key, uint32_t iv)
{
const unsigned long *k = (const unsigned long *)key;
return (uint32_t) *k;
}
static bool
cid_compare_function (const void *key1, const void *key2)
{
const unsigned long *k1 = (const unsigned long *)key1;
const unsigned long *k2 = (const unsigned long *)key2;
return *k1 == *k2;
}
#endif
/*
* Main initialization function, init multi_context object.
*/
void
multi_init (struct multi_context *m, struct context *t, bool tcp_mode, int thread_mode)
{
int dev = DEV_TYPE_UNDEF;
msg (D_MULTI_LOW, "MULTI: multi_init called, r=%d v=%d",
t->options.real_hash_size,
t->options.virtual_hash_size);
/*
* Get tun/tap/null device type
*/
dev = dev_type_enum (t->options.dev, t->options.dev_type);
/*
* Init our multi_context object.
*/
CLEAR (*m);
m->thread_mode = thread_mode;
/*
* Real address hash table (source port number is
* considered to be part of the address). Used
* to determine which client sent an incoming packet
* which is seen on the TCP/UDP socket.
*/
m->hash = hash_init (t->options.real_hash_size,
get_random (),
mroute_addr_hash_function,
mroute_addr_compare_function);
/*
* Virtual address hash table. Used to determine
* which client to route a packet to.
*/
m->vhash = hash_init (t->options.virtual_hash_size,
get_random (),
mroute_addr_hash_function,
mroute_addr_compare_function);
/*
* This hash table is a clone of m->hash but with a
* bucket size of one so that it can be used
* for fast iteration through the list.
*/
m->iter = hash_init (1,
get_random (),
mroute_addr_hash_function,
mroute_addr_compare_function);
#ifdef MANAGEMENT_DEF_AUTH
m->cid_hash = hash_init (t->options.real_hash_size,
0,
cid_hash_function,
cid_compare_function);
#endif
/*
* This is our scheduler, for time-based wakeup
* events.
*/
m->schedule = schedule_init ();
/*
* Limit frequency of incoming connections to control
* DoS.
*/
m->new_connection_limiter = frequency_limit_init (t->options.cf_max,
t->options.cf_per);
/*
* Allocate broadcast/multicast buffer list
*/
m->mbuf = mbuf_init (t->options.n_bcast_buf);
/*
* Different status file format options are available
*/
m->status_file_version = t->options.status_file_version;
/*
* Possibly allocate an ifconfig pool, do it
* differently based on whether a tun or tap style
* tunnel.
*/
if (t->options.ifconfig_pool_defined)
{
if (dev == DEV_TYPE_TAP)
{
m->ifconfig_pool = ifconfig_pool_init (IFCONFIG_POOL_INDIV,
t->options.ifconfig_pool_start,
t->options.ifconfig_pool_end,
t->options.duplicate_cn);
}
else if (dev == DEV_TYPE_TUN)
{
m->ifconfig_pool = ifconfig_pool_init (
(t->options.topology == TOP_NET30) ? IFCONFIG_POOL_30NET : IFCONFIG_POOL_INDIV,
t->options.ifconfig_pool_start,
t->options.ifconfig_pool_end,
t->options.duplicate_cn);
}
else
{
ASSERT (0);
}
/* reload pool data from file */
if (t->c1.ifconfig_pool_persist)
ifconfig_pool_read (t->c1.ifconfig_pool_persist, m->ifconfig_pool);
}
/*
* Help us keep track of routing table.
*/
m->route_helper = mroute_helper_init (MULTI_CACHE_ROUTE_TTL);
/*
* Initialize route and instance reaper.
*/
m->reaper = multi_reap_new (reap_buckets_per_pass (t->options.virtual_hash_size));
/*
* Get local ifconfig address
*/
CLEAR (m->local);
ASSERT (t->c1.tuntap);
mroute_extract_in_addr_t (&m->local, t->c1.tuntap->local);
/*
* Per-client limits
*/
m->max_clients = t->options.max_clients;
/*
* Initialize multi-socket TCP I/O wait object
*/
if (tcp_mode)
m->mtcp = multi_tcp_init (t->options.max_clients, &m->max_clients);
m->tcp_queue_limit = t->options.tcp_queue_limit;
/*
* Allow client <-> client communication, without going through
* tun/tap interface and network stack?
*/
m->enable_c2c = t->options.enable_c2c;
}
const char *
multi_instance_string (const struct multi_instance *mi, bool null, struct gc_arena *gc)
{
if (mi)
{
struct buffer out = alloc_buf_gc (256, gc);
const char *cn = tls_common_name (mi->context.c2.tls_multi, true);
if (cn)
buf_printf (&out, "%s/", cn);
buf_printf (&out, "%s", mroute_addr_print (&mi->real, gc));
return BSTR (&out);
}
else if (null)
return NULL;
else
return "UNDEF";
}
void
generate_prefix (struct multi_instance *mi)
{
mi->msg_prefix = multi_instance_string (mi, true, &mi->gc);
set_prefix (mi);
}
void
ungenerate_prefix (struct multi_instance *mi)
{
mi->msg_prefix = NULL;
set_prefix (mi);
}
static const char *
mi_prefix (const struct multi_instance *mi)
{
if (mi && mi->msg_prefix)
return mi->msg_prefix;
else
return "UNDEF_I";
}
/*
* Tell the route helper about deleted iroutes so
* that it can update its mask of currently used
* CIDR netlengths.
*/
static void
multi_del_iroutes (struct multi_context *m,
struct multi_instance *mi)
{
const struct iroute *ir;
if (TUNNEL_TYPE (mi->context.c1.tuntap) == DEV_TYPE_TUN)
{
for (ir = mi->context.options.iroutes; ir != NULL; ir = ir->next)
mroute_helper_del_iroute (m->route_helper, ir);
}
}
static void
setenv_stats (struct context *c)
{
setenv_counter (c->c2.es, "bytes_received", c->c2.link_read_bytes);
setenv_counter (c->c2.es, "bytes_sent", c->c2.link_write_bytes);
}
static void
multi_client_disconnect_setenv (struct multi_context *m,
struct multi_instance *mi)
{
/* setenv client real IP address */
setenv_trusted (mi->context.c2.es, get_link_socket_info (&mi->context));
/* setenv stats */
setenv_stats (&mi->context);
/* setenv connection duration */
{
const unsigned int duration = (unsigned int) now - mi->created;
setenv_unsigned (mi->context.c2.es, "time_duration", duration);
}
}
static void
multi_client_disconnect_script (struct multi_context *m,
struct multi_instance *mi)
{
if ((mi->context.c2.context_auth == CAS_SUCCEEDED && mi->connection_established_flag)
|| mi->context.c2.context_auth == CAS_PARTIAL)
{
multi_client_disconnect_setenv (m, mi);
if (plugin_defined (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_DISCONNECT))
{
if (plugin_call (mi->context.plugins, OPENVPN_PLUGIN_CLIENT_DISCONNECT, NULL, NULL, mi->context.c2.es) != OPENVPN_PLUGIN_FUNC_SUCCESS)
msg (M_WARN, "WARNING: client-disconnect plugin call failed");
}
if (mi->context.options.client_disconnect_script)
{
struct argv argv = argv_new ();
setenv_str (mi->context.c2.es, "script_type", "client-disconnect");
argv_printf (&argv, "%sc", mi->context.options.client_disconnect_script);
openvpn_execve_check (&argv, mi->context.c2.es, S_SCRIPT, "client-disconnect command failed");
argv_reset (&argv);
}
#ifdef MANAGEMENT_DEF_AUTH
if (management)
management_notify_client_close (management, &mi->context.c2.mda_context, mi->context.c2.es);
#endif
}
}
void
multi_close_instance (struct multi_context *m,
struct multi_instance *mi,
bool shutdown)
{
perf_push (PERF_MULTI_CLOSE_INSTANCE);
ASSERT (!mi->halt);
mi->halt = true;
dmsg (D_MULTI_DEBUG, "MULTI: multi_close_instance called");
/* adjust current client connection count */
m->n_clients += mi->n_clients_delta;
mi->n_clients_delta = 0;
/* prevent dangling pointers */
if (m->pending == mi)
multi_set_pending (m, NULL);
if (m->earliest_wakeup == mi)
m->earliest_wakeup = NULL;
if (!shutdown)
{
if (mi->did_real_hash)
{
ASSERT (hash_remove (m->hash, &mi->real));
}
if (mi->did_iter)
{
ASSERT (hash_remove (m->iter, &mi->real));
}
#ifdef MANAGEMENT_DEF_AUTH
if (mi->did_cid_hash)
{
ASSERT (hash_remove (m->cid_hash, &mi->context.c2.mda_context.cid));
}
#endif
schedule_remove_entry (m->schedule, (struct schedule_entry *) mi);
ifconfig_pool_release (m->ifconfig_pool, mi->vaddr_handle, false);
if (mi->did_iroutes)
{
multi_del_iroutes (m, mi);
mi->did_iroutes = false;
}
if (m->mtcp)
multi_tcp_dereference_instance (m->mtcp, mi);
mbuf_dereference_instance (m->mbuf, mi);
}
#ifdef MANAGEMENT_DEF_AUTH
set_cc_config (mi, NULL);
#endif
multi_client_disconnect_script (m, mi);
if (mi->did_open_context)
close_context (&mi->context, SIGTERM, CC_GC_FREE);
multi_tcp_instance_specific_free (mi);
ungenerate_prefix (mi);
/*
* Don't actually delete the instance memory allocation yet,
* because virtual routes may still point to it. Let the
* vhash reaper deal with it.
*/
multi_instance_dec_refcount (mi);
perf_pop ();
}
/*
* Called on shutdown or restart.
*/
void
multi_uninit (struct multi_context *m)
{
if (m->thread_mode & MC_WORK_THREAD)
{
multi_top_free (m);
m->thread_mode = MC_UNDEF;
}
else if (m->thread_mode)
{
if (m->hash)
{
struct hash_iterator hi;
struct hash_element *he;
hash_iterator_init (m->iter, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct multi_instance *mi = (struct multi_instance *) he->value;
mi->did_iter = false;
multi_close_instance (m, mi, true);
}
hash_iterator_free (&hi);
multi_reap_all (m);
hash_free (m->hash);
hash_free (m->vhash);
hash_free (m->iter);
#ifdef MANAGEMENT_DEF_AUTH
hash_free (m->cid_hash);
#endif
m->hash = NULL;
schedule_free (m->schedule);
mbuf_free (m->mbuf);
ifconfig_pool_free (m->ifconfig_pool);
frequency_limit_free (m->new_connection_limiter);
multi_reap_free (m->reaper);
mroute_helper_free (m->route_helper);
multi_tcp_free (m->mtcp);
m->thread_mode = MC_UNDEF;
}
}
}
/*
* Create a client instance object for a newly connected client.
*/
struct multi_instance *
multi_create_instance (struct multi_context *m, const struct mroute_addr *real)
{
struct gc_arena gc = gc_new ();
struct multi_instance *mi;
perf_push (PERF_MULTI_CREATE_INSTANCE);
msg (D_MULTI_LOW, "MULTI: multi_create_instance called");
ALLOC_OBJ_CLEAR (mi, struct multi_instance);
mutex_init (&mi->mutex);
mi->gc = gc_new ();
multi_instance_inc_refcount (mi);
mi->vaddr_handle = -1;
mi->created = now;
mroute_addr_init (&mi->real);
if (real)
{
mi->real = *real;
generate_prefix (mi);
}
mi->did_open_context = true;
inherit_context_child (&mi->context, &m->top);
if (IS_SIG (&mi->context))
goto err;
mi->context.c2.context_auth = CAS_PENDING;
if (hash_n_elements (m->hash) >= m->max_clients)
{
msg (D_MULTI_ERRORS, "MULTI: new incoming connection would exceed maximum number of clients (%d)", m->max_clients);
goto err;
}
if (!real) /* TCP mode? */
{
if (!multi_tcp_instance_specific_init (m, mi))
goto err;
generate_prefix (mi);
}
if (!hash_add (m->iter, &mi->real, mi, false))
{
msg (D_MULTI_LOW, "MULTI: unable to add real address [%s] to iterator hash table",
mroute_addr_print (&mi->real, &gc));
goto err;
}
mi->did_iter = true;
#ifdef MANAGEMENT_DEF_AUTH
do {
mi->context.c2.mda_context.cid = m->cid_counter++;
} while (!hash_add (m->cid_hash, &mi->context.c2.mda_context.cid, mi, false));
mi->did_cid_hash = true;
#endif
mi->context.c2.push_reply_deferred = true;
if (!multi_process_post (m, mi, MPP_PRE_SELECT))
{
msg (D_MULTI_ERRORS, "MULTI: signal occurred during client instance initialization");
goto err;
}
perf_pop ();
gc_free (&gc);
return mi;
err:
multi_close_instance (m, mi, false);
perf_pop ();
gc_free (&gc);
return NULL;
}
/*
* Dump tables -- triggered by SIGUSR2.
* If status file is defined, write to file.
* If status file is NULL, write to syslog.
*/
void
multi_print_status (struct multi_context *m, struct status_output *so, const int version)
{
if (m->hash)
{
struct gc_arena gc_top = gc_new ();
struct hash_iterator hi;
const struct hash_element *he;
status_reset (so);
if (version == 1) /* WAS: m->status_file_version */
{
/*
* Status file version 1
*/
status_printf (so, "OpenVPN CLIENT LIST");
status_printf (so, "Updated,%s", time_string (0, 0, false, &gc_top));
status_printf (so, "Common Name,Real Address,Bytes Received,Bytes Sent,Connected Since");
hash_iterator_init (m->hash, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct gc_arena gc = gc_new ();
const struct multi_instance *mi = (struct multi_instance *) he->value;
if (!mi->halt)
{
status_printf (so, "%s,%s," counter_format "," counter_format ",%s",
tls_common_name (mi->context.c2.tls_multi, false),
mroute_addr_print (&mi->real, &gc),
mi->context.c2.link_read_bytes,
mi->context.c2.link_write_bytes,
time_string (mi->created, 0, false, &gc));
}
gc_free (&gc);
}
hash_iterator_free (&hi);
status_printf (so, "ROUTING TABLE");
status_printf (so, "Virtual Address,Common Name,Real Address,Last Ref");
hash_iterator_init (m->vhash, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct gc_arena gc = gc_new ();
const struct multi_route *route = (struct multi_route *) he->value;
if (multi_route_defined (m, route))
{
const struct multi_instance *mi = route->instance;
const struct mroute_addr *ma = &route->addr;
char flags[2] = {0, 0};
if (route->flags & MULTI_ROUTE_CACHE)
flags[0] = 'C';
status_printf (so, "%s%s,%s,%s,%s",
mroute_addr_print (ma, &gc),
flags,
tls_common_name (mi->context.c2.tls_multi, false),
mroute_addr_print (&mi->real, &gc),
time_string (route->last_reference, 0, false, &gc));
}
gc_free (&gc);
}
hash_iterator_free (&hi);
status_printf (so, "GLOBAL STATS");
if (m->mbuf)
status_printf (so, "Max bcast/mcast queue length,%d",
mbuf_maximum_queued (m->mbuf));
status_printf (so, "END");
}
else if (version == 2 || version == 3)
{
const char sep = (version == 3) ? '\t' : ',';
/*
* Status file version 2 and 3
*/
status_printf (so, "TITLE%c%s", sep, title_string);
status_printf (so, "TIME%c%s%c%u", sep, time_string (now, 0, false, &gc_top), sep, (unsigned int)now);
status_printf (so, "HEADER%cCLIENT_LIST%cCommon Name%cReal Address%cVirtual Address%cBytes Received%cBytes Sent%cConnected Since%cConnected Since (time_t)",
sep, sep, sep, sep, sep, sep, sep, sep);
hash_iterator_init (m->hash, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct gc_arena gc = gc_new ();
const struct multi_instance *mi = (struct multi_instance *) he->value;
if (!mi->halt)
{
status_printf (so, "CLIENT_LIST%c%s%c%s%c%s%c" counter_format "%c" counter_format "%c%s%c%u",
sep, tls_common_name (mi->context.c2.tls_multi, false),
sep, mroute_addr_print (&mi->real, &gc),
sep, print_in_addr_t (mi->reporting_addr, IA_EMPTY_IF_UNDEF, &gc),
sep, mi->context.c2.link_read_bytes,
sep, mi->context.c2.link_write_bytes,
sep, time_string (mi->created, 0, false, &gc),
sep, (unsigned int)mi->created);
}
gc_free (&gc);
}
hash_iterator_free (&hi);
status_printf (so, "HEADER%cROUTING_TABLE%cVirtual Address%cCommon Name%cReal Address%cLast Ref%cLast Ref (time_t)",
sep, sep, sep, sep, sep, sep);
hash_iterator_init (m->vhash, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct gc_arena gc = gc_new ();
const struct multi_route *route = (struct multi_route *) he->value;
if (multi_route_defined (m, route))
{
const struct multi_instance *mi = route->instance;
const struct mroute_addr *ma = &route->addr;
char flags[2] = {0, 0};
if (route->flags & MULTI_ROUTE_CACHE)
flags[0] = 'C';
status_printf (so, "ROUTING_TABLE%c%s%s%c%s%c%s%c%s%c%u",
sep, mroute_addr_print (ma, &gc), flags,
sep, tls_common_name (mi->context.c2.tls_multi, false),
sep, mroute_addr_print (&mi->real, &gc),
sep, time_string (route->last_reference, 0, false, &gc),
sep, (unsigned int)route->last_reference);
}
gc_free (&gc);
}
hash_iterator_free (&hi);
if (m->mbuf)
status_printf (so, "GLOBAL_STATS%cMax bcast/mcast queue length%c%d",
sep, sep, mbuf_maximum_queued (m->mbuf));
status_printf (so, "END");
}
else
{
status_printf (so, "ERROR: bad status format version number");
}
#ifdef PACKET_TRUNCATION_CHECK
{
status_printf (so, "HEADER,ERRORS,Common Name,TUN Read Trunc,TUN Write Trunc,Pre-encrypt Trunc,Post-decrypt Trunc");
hash_iterator_init (m->hash, &hi, true);
while ((he = hash_iterator_next (&hi)))
{
struct gc_arena gc = gc_new ();
const struct multi_instance *mi = (struct multi_instance *) he->value;
if (!mi->halt)
{
status_printf (so, "ERRORS,%s," counter_format "," counter_format "," counter_format "," counter_format,
tls_common_name (mi->context.c2.tls_multi, false),
m->top.c2.n_trunc_tun_read,
mi->context.c2.n_trunc_tun_write,
mi->context.c2.n_trunc_pre_encrypt,
mi->context.c2.n_trunc_post_decrypt);
}
gc_free (&gc);
}
hash_iterator_free (&hi);
}
#endif
status_flush (so);
gc_free (&gc_top);
}
}
/*
* Learn a virtual address or route.
* The learn will fail if the learn address
* script/plugin fails. In this case the
* return value may be != mi.
* Return the instance which owns this route,
* or NULL if none.
*/
static struct multi_instance *
multi_learn_addr (struct multi_context *m,
struct multi_instance *mi,
const struct mroute_addr *addr,
const unsigned int flags)
{
struct hash_element *he;
const uint32_t hv = hash_value (m->vhash, addr);
struct hash_bucket *bucket = hash_bucket (m->vhash, hv);
struct multi_route *oldroute = NULL;
struct multi_instance *owner = NULL;
hash_bucket_lock (bucket);
/* if route currently exists, get the instance which owns it */
he = hash_lookup_fast (m->vhash, bucket, addr, hv);
if (he)
oldroute = (struct multi_route *) he->value;
if (oldroute && multi_route_defined (m, oldroute))
owner = oldroute->instance;
/* do we need to add address to hash table? */
if ((!owner || owner != mi)
&& mroute_learnable_address (addr)
&& !mroute_addr_equal (addr, &m->local))
{
struct gc_arena gc = gc_new ();
struct multi_route *newroute;
bool learn_succeeded = false;
ALLOC_OBJ (newroute, struct multi_route);
newroute->addr = *addr;
newroute->instance = mi;
newroute->flags = flags;
newroute->last_reference = now;
newroute->cache_generation = 0;
/* The cache is invalidated when cache_generation is incremented */
if (flags & MULTI_ROUTE_CACHE)
newroute->cache_generation = m->route_helper->cache_generation;
if (oldroute) /* route already exists? */
{
if (route_quota_test (m, mi) && learn_address_script (m, mi, "update", &newroute->addr))
{
learn_succeeded = true;
owner = mi;
multi_instance_inc_refcount (mi);
route_quota_inc (mi);
/* delete old route */
multi_route_del (oldroute);
/* modify hash table entry, replacing old route */
he->key = &newroute->addr;
he->value = newroute;
}
}
else
{
if (route_quota_test (m, mi) && learn_address_script (m, mi, "add", &newroute->addr))
{
learn_succeeded = true;
owner = mi;
multi_instance_inc_refcount (mi);
route_quota_inc (mi);
/* add new route */
hash_add_fast (m->vhash, bucket, &newroute->addr, hv, newroute);
}
}
msg (D_MULTI_LOW, "MULTI: Learn%s: %s -> %s",
learn_succeeded ? "" : " FAILED",
mroute_addr_print (&newroute->addr, &gc),
multi_instance_string (mi, false, &gc));
if (!learn_succeeded)
free (newroute);
gc_free (&gc);
}
hash_bucket_unlock (bucket);
return owner;
}
/*
* Get client instance based on virtual address.
*/
static struct multi_instance *
multi_get_instance_by_virtual_addr (struct multi_context *m,
const struct mroute_addr *addr,
bool cidr_routing)
{
struct multi_route *route;
struct multi_instance *ret = NULL;
/* check for local address */
if (mroute_addr_equal (addr, &m->local))
return NULL;
route = (struct multi_route *) hash_lookup (m->vhash, addr);
/* does host route (possible cached) exist? */
if (route && multi_route_defined (m, route))
{
struct multi_instance *mi = route->instance;
route->last_reference = now;
ret = mi;
}
else if (cidr_routing) /* do we need to regenerate a host route cache entry? */
{
struct mroute_helper *rh = m->route_helper;