aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/tls/tls.c
blob: d7dcb6de8f432cb6f1b025e52db89cfea89c6ff6 (plain)
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
/*
 * Copyright (c) 2018 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/session/application_interface.h>
#include <vppinfra/lock.h>
#include <vnet/tls/tls.h>

static tls_main_t tls_main;
static tls_engine_vft_t *tls_vfts;

#define TLS_INVALID_HANDLE 	~0
#define TLS_IDX_MASK 		0x00FFFFFF
#define TLS_ENGINE_TYPE_SHIFT 	29

void tls_disconnect (u32 ctx_handle, u32 thread_index);

tls_engine_type_t
tls_get_available_engine (void)
{
  int i;
  for (i = 0; i < vec_len (tls_vfts); i++)
    {
      if (tls_vfts[i].ctx_alloc)
	return i;
    }
  return TLS_ENGINE_NONE;
}

int
tls_add_vpp_q_evt (svm_fifo_t * f, u8 evt_type)
{
  session_fifo_event_t evt;
  svm_queue_t *q;

  if (svm_fifo_set_event (f))
    {
      evt.fifo = f;
      evt.event_type = evt_type;

      q = session_manager_get_vpp_event_queue (f->master_thread_index);
      if (PREDICT_TRUE (q->cursize < q->maxsize))
	{
	  svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
	}
      else
	{
	  clib_warning ("vpp's evt q full");
	  return -1;
	}
    }
  return 0;
}

static inline int
tls_add_app_q_evt (application_t * app, stream_session_t * app_session)
{
  session_fifo_event_t evt;
  svm_queue_t *q;

  if (PREDICT_FALSE (app_session->session_state == SESSION_STATE_CLOSED))
    {
      /* Session is closed so app will never clean up. Flush rx fifo */
      u32 to_dequeue = svm_fifo_max_dequeue (app_session->server_rx_fifo);
      if (to_dequeue)
	svm_fifo_dequeue_drop (app_session->server_rx_fifo, to_dequeue);
      return 0;
    }

  if (app->cb_fns.builtin_app_rx_callback)
    return app->cb_fns.builtin_app_rx_callback (app_session);

  if (svm_fifo_set_event (app_session->server_rx_fifo))
    {
      evt.fifo = app_session->server_rx_fifo;
      evt.event_type = FIFO_EVENT_APP_RX;
      q = app->event_queue;

      if (PREDICT_TRUE (q->cursize < q->maxsize))
	{
	  svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
	}
      else
	{
	  clib_warning ("app evt q full");
	  return -1;
	}
    }
  return 0;
}

u32
tls_listener_ctx_alloc (void)
{
  tls_main_t *tm = &tls_main;
  tls_ctx_t *ctx;

  pool_get (tm->listener_ctx_pool, ctx);
  memset (ctx, 0, sizeof (*ctx));
  return ctx - tm->listener_ctx_pool;
}

void
tls_listener_ctx_free (tls_ctx_t * ctx)
{
  pool_put (tls_main.listener_ctx_pool, ctx);
}

tls_ctx_t *
tls_listener_ctx_get (u32 ctx_index)
{
  return pool_elt_at_index (tls_main.listener_ctx_pool, ctx_index);
}

u32
tls_listener_ctx_index (tls_ctx_t * ctx)
{
  return (ctx - tls_main.listener_ctx_pool);
}

u32
tls_ctx_half_open_alloc (void)
{
  tls_main_t *tm = &tls_main;
  u8 will_expand = 0;
  tls_ctx_t *ctx;
  u32 ctx_index;

  pool_get_aligned_will_expand (tm->half_open_ctx_pool, will_expand, 0);
  if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
    {
      clib_rwlock_writer_lock (&tm->half_open_rwlock);
      pool_get (tm->half_open_ctx_pool, ctx);
      memset (ctx, 0, sizeof (*ctx));
      ctx_index = ctx - tm->half_open_ctx_pool;
      clib_rwlock_writer_unlock (&tm->half_open_rwlock);
    }
  else
    {
      pool_get (tm->half_open_ctx_pool, ctx);
      memset (ctx, 0, sizeof (*ctx));
      ctx_index = ctx - tm->half_open_ctx_pool;
    }
  return ctx_index;
}

void
tls_ctx_half_open_free (u32 ho_index)
{
  tls_main_t *tm = &tls_main;
  clib_rwlock_writer_lock (&tm->half_open_rwlock);
  pool_put_index (tls_main.half_open_ctx_pool, ho_index);
  clib_rwlock_writer_unlock (&tm->half_open_rwlock);
}

tls_ctx_t *
tls_ctx_half_open_get (u32 ctx_index)
{
  tls_main_t *tm = &tls_main;
  clib_rwlock_reader_lock (&tm->half_open_rwlock);
  return pool_elt_at_index (tm->half_open_ctx_pool, ctx_index);
}

void
tls_ctx_half_open_reader_unlock ()
{
  clib_rwlock_reader_unlock (&tls_main.half_open_rwlock);
}

u32
tls_ctx_half_open_index (tls_ctx_t * ctx)
{
  return (ctx - tls_main.half_open_ctx_pool);
}

void
tls_notify_app_enqueue (tls_ctx_t * ctx, stream_session_t * app_session)
{
  application_t *app;
  app = application_get_if_valid (app_session->app_index);
  if (PREDICT_TRUE (app != 0))
    tls_add_app_q_evt (app, app_session);
}

int
tls_notify_app_accept (tls_ctx_t * ctx)
{
  stream_session_t *app_listener, *app_session;
  segment_manager_t *sm;
  application_t *app;
  tls_ctx_t *lctx;
  int rv;

  app = application_get (ctx->parent_app_index);
  lctx = tls_listener_ctx_get (ctx->listener_ctx_index);
  app_listener = listen_session_get_from_handle (lctx->app_session_handle);
  sm = application_get_listen_segment_manager (app, app_listener);

  app_session = session_alloc (vlib_get_thread_index ());
  app_session->app_index = ctx->parent_app_index;
  app_session->connection_index = ctx->tls_ctx_handle;
  app_session->session_type = app_listener->session_type;
  app_session->listener_index = app_listener->session_index;
  if ((rv = session_alloc_fifos (sm, app_session)))
    {
      TLS_DBG (1, "failed to allocate fifos");
      return rv;
    }
  ctx->c_s_index = app_session->session_index;
  ctx->app_session_handle = session_handle (app_session);
  return app->cb_fns.session_accept_callback (app_session);
}

int
tls_notify_app_connected (tls_ctx_t * ctx, u8 is_failed)
{
  int (*cb_fn) (u32, u32, stream_session_t *, u8);
  stream_session_t *app_session;
  segment_manager_t *sm;
  application_t *app;

  app = application_get (ctx->parent_app_index);
  cb_fn = app->cb_fns.session_connected_callback;

  if (is_failed)
    goto failed;

  sm = application_get_connect_segment_manager (app);
  app_session = session_alloc (vlib_get_thread_index ());
  app_session->app_index = ctx->parent_app_index;
  app_session->connection_index = ctx->tls_ctx_handle;
  app_session->session_type =
    session_type_from_proto_and_ip (TRANSPORT_PROTO_TLS, ctx->tcp_is_ip4);
  if (session_alloc_fifos (sm, app_session))
    goto failed;

  ctx->app_session_handle = session_handle (app_session);
  ctx->c_s_index = app_session->session_index;
  app_session->session_state = SESSION_STATE_READY;
  if (cb_fn (ctx->parent_app_index, ctx->parent_app_api_context,
	     app_session, 0 /* not failed */ ))
    {
      TLS_DBG (1, "failed to notify app");
      tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
    }

  return 0;

failed:
  tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
  return cb_fn (ctx->parent_app_index, ctx->parent_app_api_context, 0,
		1 /* failed */ );
}

static inline void
tls_ctx_parse_handle (u32 ctx_handle, u32 * ctx_index, u32 * engine_type)
{
  *ctx_index = ctx_handle & TLS_IDX_MASK;
  *engine_type = ctx_handle >> TLS_ENGINE_TYPE_SHIFT;
}

static inline tls_engine_type_t
tls_get_engine_type (tls_engine_type_t preferred)
{
  if (!tls_vfts[preferred].ctx_alloc)
    return tls_get_available_engine ();
  return preferred;
}

static inline u32
tls_ctx_alloc (tls_engine_type_t engine_type)
{
  u32 ctx_index;
  ctx_index = tls_vfts[engine_type].ctx_alloc ();
  return (((u32) engine_type << TLS_ENGINE_TYPE_SHIFT) | ctx_index);
}

static inline void
tls_ctx_free (tls_ctx_t * ctx)
{
  vec_free (ctx->srv_hostname);
  tls_vfts[ctx->tls_ctx_engine].ctx_free (ctx);
}

static inline tls_ctx_t *
tls_ctx_get (u32 ctx_handle)
{
  u32 ctx_index, engine_type;
  tls_ctx_parse_handle (ctx_handle, &ctx_index, &engine_type);
  return tls_vfts[engine_type].ctx_get (ctx_index);
}

static inline tls_ctx_t *
tls_ctx_get_w_thread (u32 ctx_handle, u8 thread_index)
{
  u32 ctx_index, engine_type;
  tls_ctx_parse_handle (ctx_handle, &ctx_index, &engine_type);
  return tls_vfts[engine_type].ctx_get_w_thread (ctx_index, thread_index);
}

static inline int
tls_ctx_init_server (tls_ctx_t * ctx)
{
  return tls_vfts[ctx->tls_ctx_engine].ctx_init_server (ctx);
}

static inline int
tls_ctx_init_client (tls_ctx_t * ctx)
{
  return tls_vfts[ctx->tls_ctx_engine].ctx_init_client (ctx);
}

static inline int
tls_ctx_write (tls_ctx_t * ctx, stream_session_t * app_session)
{
  return tls_vfts[ctx->tls_ctx_engine].ctx_write (ctx, app_session);
}

static inline int
tls_ctx_read (tls_ctx_t * ctx, stream_session_t * tls_session)
{
  return tls_vfts[ctx->tls_ctx_engine].ctx_read (ctx, tls_session);
}

static inline u8
tls_ctx_handshake_is_over (tls_ctx_t * ctx)
{
  return tls_vfts[ctx->tls_ctx_engine].ctx_handshake_is_over (ctx);
}

void
tls_session_reset_callback (stream_session_t * s)
{
  clib_warning ("called...");
}

int
tls_add_segment_callback (u32 client_index, const ssvm_private_t * fs)
{
  /* No-op for builtin */
  return 0;
}

int
tls_del_segment_callback (u32 client_index, const ssvm_private_t * fs)
{
  return 0;
}

void
tls_session_disconnect_callback (stream_session_t * tls_session)
{
  stream_session_t *app_session;
  tls_ctx_t *ctx;
  application_t *app;

  ctx = tls_ctx_get (tls_session->opaque);
  if (!tls_ctx_handshake_is_over (ctx))
    {
      stream_session_disconnect (tls_session);
      return;
    }
  ctx->is_passive_close = 1;
  app = application_get (ctx->parent_app_index);
  app_session = session_get_from_handle (ctx->app_session_handle);
  app->cb_fns.session_disconnect_callback (app_session);
}

int
tls_session_accept_callback (stream_session_t * tls_session)
{
  stream_session_t *tls_listener;
  tls_ctx_t *lctx, *ctx;
  u32 ctx_handle;

  tls_listener = listen_session_get (tls_session->session_type,
				     tls_session->listener_index);
  lctx = tls_listener_ctx_get (tls_listener->opaque);

  ctx_handle = tls_ctx_alloc (lctx->tls_ctx_engine);
  ctx = tls_ctx_get (ctx_handle);
  memcpy (ctx, lctx, sizeof (*lctx));
  ctx->c_thread_index = vlib_get_thread_index ();
  ctx->tls_ctx_handle = ctx_handle;
  tls_session->session_state = SESSION_STATE_READY;
  tls_session->opaque = ctx_handle;
  ctx->tls_session_handle = session_handle (tls_session);
  ctx->listener_ctx_index = tls_listener->opaque;

  TLS_DBG (1, "Accept on listener %u new connection [%u]%x",
	   tls_listener->opaque, vlib_get_thread_index (), ctx_handle);

  return tls_ctx_init_server (ctx);
}

int
tls_app_tx_callback (stream_session_t * app_session)
{
  tls_ctx_t *ctx;
  if (PREDICT_FALSE (app_session->session_state == SESSION_STATE_CLOSED))
    return 0;
  ctx = tls_ctx_get (app_session->connection_index);
  tls_ctx_write (ctx, app_session);
  return 0;
}

int
tls_app_rx_callback (stream_session_t * tls_session)
{
  tls_ctx_t *ctx;

  ctx = tls_ctx_get (tls_session->opaque);
  tls_ctx_read (ctx, tls_session);
  return 0;
}

int
tls_session_connected_callback (u32 tls_app_index, u32 ho_ctx_index,
				stream_session_t * tls_session, u8 is_fail)
{
  int (*cb_fn) (u32, u32, stream_session_t *, u8);
  application_t *app;
  tls_ctx_t *ho_ctx, *ctx;
  u32 ctx_handle;

  ho_ctx = tls_ctx_half_open_get (ho_ctx_index);
  app = application_get (ho_ctx->parent_app_index);
  cb_fn = app->cb_fns.session_connected_callback;

  if (is_fail)
    {
      tls_ctx_half_open_reader_unlock ();
      tls_ctx_half_open_free (ho_ctx_index);
      return cb_fn (ho_ctx->parent_app_index, ho_ctx->c_s_index, 0,
		    1 /* failed */ );
    }

  ctx_handle = tls_ctx_alloc (ho_ctx->tls_ctx_engine);
  ctx = tls_ctx_get (ctx_handle);
  clib_memcpy (ctx, ho_ctx, sizeof (*ctx));
  tls_ctx_half_open_reader_unlock ();
  tls_ctx_half_open_free (ho_ctx_index);

  ctx->c_thread_index = vlib_get_thread_index ();
  ctx->tls_ctx_handle = ctx_handle;

  TLS_DBG (1, "TCP connect for %u returned %u. New connection [%u]%x",
	   ho_ctx_index, is_fail, vlib_get_thread_index (),
	   (ctx) ? ctx_handle : ~0);

  ctx->tls_session_handle = session_handle (tls_session);
  tls_session->opaque = ctx_handle;
  tls_session->session_state = SESSION_STATE_READY;

  return tls_ctx_init_client (ctx);
}

/* *INDENT-OFF* */
static session_cb_vft_t tls_app_cb_vft = {
  .session_accept_callback = tls_session_accept_callback,
  .session_disconnect_callback = tls_session_disconnect_callback,
  .session_connected_callback = tls_session_connected_callback,
  .session_reset_callback = tls_session_reset_callback,
  .add_segment_callback = tls_add_segment_callback,
  .del_segment_callback = tls_del_segment_callback,
  .builtin_app_rx_callback = tls_app_rx_callback,
  .builtin_app_tx_callback = tls_app_tx_callback,
};
/* *INDENT-ON* */

int
tls_connect (transport_endpoint_t * tep)
{
  session_endpoint_extended_t *sep;
  tls_engine_type_t engine_type;
  session_endpoint_t tls_sep;
  tls_main_t *tm = &tls_main;
  application_t *app;
  tls_ctx_t *ctx;
  u32 ctx_index;
  int rv;

  sep = (session_endpoint_extended_t *) tep;
  app = application_get (sep->app_index);
  engine_type = tls_get_engine_type (app->tls_engine);
  if (engine_type == TLS_ENGINE_NONE)
    {
      clib_warning ("No tls engine_type available");
      return -1;
    }

  ctx_index = tls_ctx_half_open_alloc ();
  ctx = tls_ctx_half_open_get (ctx_index);
  ctx->parent_app_index = sep->app_index;
  ctx->parent_app_api_context = sep->opaque;
  ctx->tcp_is_ip4 = sep->is_ip4;
  if (sep->hostname)
    {
      ctx->srv_hostname = format (0, "%v", sep->hostname);
      vec_terminate_c_string (ctx->srv_hostname);
    }
  tls_ctx_half_open_reader_unlock ();

  application_alloc_connects_segment_manager (app);
  ctx->tls_ctx_engine = engine_type;

  clib_memcpy (&tls_sep, sep, sizeof (tls_sep));
  tls_sep.transport_proto = TRANSPORT_PROTO_TCP;
  if ((rv = application_connect (tm->app_index, ctx_index, &tls_sep)))
    return rv;

  TLS_DBG (1, "New connect request %u engine %d", ctx_index, engine_type);
  return 0;
}

void
tls_disconnect (u32 ctx_handle, u32 thread_index)
{
  stream_session_t *tls_session, *app_session;
  tls_ctx_t *ctx;

  TLS_DBG (1, "Disconnecting %x", ctx_handle);

  ctx = tls_ctx_get (ctx_handle);
  tls_session = session_get_from_handle (ctx->tls_session_handle);
  stream_session_disconnect (tls_session);

  app_session = session_get_from_handle_if_valid (ctx->app_session_handle);
  if (app_session)
    {
      segment_manager_dealloc_fifos (app_session->svm_segment_index,
				     app_session->server_rx_fifo,
				     app_session->server_tx_fifo);
      session_free (app_session);
    }
  tls_ctx_free (ctx);
}

u32
tls_start_listen (u32 app_listener_index, transport_endpoint_t * tep)
{
  tls_main_t *tm = &tls_main;
  application_t *tls_app, *app;
  session_handle_t tls_handle;
  session_endpoint_extended_t *sep;
  stream_session_t *tls_listener;
  tls_ctx_t *lctx;
  u32 lctx_index;
  session_type_t st;
  stream_session_t *app_listener;
  tls_engine_type_t engine_type;

  sep = (session_endpoint_extended_t *) tep;
  app = application_get (sep->app_index);
  engine_type = tls_get_engine_type (app->tls_engine);
  if (engine_type == TLS_ENGINE_NONE)
    {
      clib_warning ("No tls engine_type available");
      return -1;
    }

  lctx_index = tls_listener_ctx_alloc ();

  tls_app = application_get (tm->app_index);
  sep->transport_proto = TRANSPORT_PROTO_TCP;
  if (application_start_listen (tls_app, (session_endpoint_t *) sep,
				&tls_handle))
    return ~0;

  tls_listener = listen_session_get_from_handle (tls_handle);
  tls_listener->opaque = lctx_index;

  st = session_type_from_proto_and_ip (TRANSPORT_PROTO_TLS, sep->is_ip4);
  app_listener = listen_session_get (st, app_listener_index);

  lctx = tls_listener_ctx_get (lctx_index);
  lctx->parent_app_index = sep->app_index;
  lctx->tls_session_handle = tls_handle;
  lctx->app_session_handle = listen_session_get_handle (app_listener);
  lctx->tcp_is_ip4 = sep->is_ip4;
  lctx->tls_ctx_engine = engine_type;

  TLS_DBG (1, "Started listening %d, engine type %d", lctx_index,
	   engine_type);
  return lctx_index;
}

u32
tls_stop_listen (u32 lctx_index)
{
  tls_main_t *tm = &tls_main;
  application_t *tls_app;
  tls_ctx_t *lctx;
  lctx = tls_listener_ctx_get (lctx_index);
  tls_app = application_get (tm->app_index);
  application_stop_listen (tls_app, lctx->tls_session_handle);
  tls_listener_ctx_free (lctx);
  return 0;
}

transport_connection_t *
tls_connection_get (u32 ctx_index, u32 thread_index)
{
  tls_ctx_t *ctx;
  ctx = tls_ctx_get_w_thread (ctx_index, thread_index);
  return &ctx->connection;
}

transport_connection_t *
tls_listener_get (u32 listener_index)
{
  tls_ctx_t *ctx;
  ctx = tls_listener_ctx_get (listener_index);
  return &ctx->connection;
}

u8 *
format_tls_ctx (u8 * s, va_list * args)
{
  tls_ctx_t *ctx = va_arg (*args, tls_ctx_t *);
  u32 thread_index = va_arg (*args, u32);
  u32 child_si, child_ti;

  session_parse_handle (ctx->tls_session_handle, &child_si, &child_ti);
  if (thread_index != child_ti)
    clib_warning ("app and tls sessions are on different threads!");

  s = format (s, "[#%d][TLS] app %u child %u", child_ti,
	      ctx->parent_app_index, child_si);
  return s;
}

u8 *
format_tls_connection (u8 * s, va_list * args)
{
  u32 ctx_index = va_arg (*args, u32);
  u32 thread_index = va_arg (*args, u32);
  u32 verbose = va_arg (*args, u32);
  tls_ctx_t *ctx;

  ctx = tls_ctx_get_w_thread (ctx_index, thread_index);
  if (!ctx)
    return s;

  s = format (s, "%-50U", format_tls_ctx, ctx, thread_index);
  if (verbose)
    {
      s = format (s, "%-15s", "state");
      if (verbose > 1)
	s = format (s, "\n");
    }
  return s;
}

u8 *
format_tls_listener (u8 * s, va_list * args)
{
  u32 tc_index = va_arg (*args, u32);
  tls_ctx_t *ctx = tls_listener_ctx_get (tc_index);
  u32 listener_index, type;

  listen_session_parse_handle (ctx->tls_session_handle, &type,
			       &listener_index);
  return format (s, "[TLS] listener app %u child %u", ctx->parent_app_index,
		 listener_index);
}

u8 *
format_tls_half_open (u8 * s, va_list * args)
{
  u32 tc_index = va_arg (*args, u32);
  tls_ctx_t *ctx = tls_ctx_half_open_get (tc_index);
  s = format (s, "[TLS] half-open app %u", ctx->parent_app_index);
  tls_ctx_half_open_reader_unlock ();
  return s;
}

/* *INDENT-OFF* */
const static transport_proto_vft_t tls_proto = {
  .open = tls_connect,
  .close = tls_disconnect,
  .bind = tls_start_listen,
  .get_connection = tls_connection_get,
  .get_listener = tls_listener_get,
  .unbind = tls_stop_listen,
  .tx_type = TRANSPORT_TX_INTERNAL,
  .service_type = TRANSPORT_SERVICE_APP,
  .format_connection = format_tls_connection,
  .format_half_open = format_tls_half_open,
  .format_listener = format_tls_listener,
};
/* *INDENT-ON* */

void
tls_register_engine (const tls_engine_vft_t * vft, tls_engine_type_t type)
{
  vec_validate (tls_vfts, type);
  tls_vfts[type] = *vft;
}

static clib_error_t *
tls_init (vlib_main_t * vm)
{
  vlib_thread_main_t *vtm = vlib_get_thread_main ();
  vnet_app_attach_args_t _a, *a = &_a;
  u64 options[APP_OPTIONS_N_OPTIONS];
  u32 segment_size = 512 << 20;
  tls_main_t *tm = &tls_main;
  u32 fifo_size = 64 << 10;
  u32 num_threads;

  num_threads = 1 /* main thread */  + vtm->n_threads;

  memset (a, 0, sizeof (*a));
  memset (options, 0, sizeof (options));

  a->session_cb_vft = &tls_app_cb_vft;
  a->api_client_index = APP_INVALID_INDEX;
  a->options = options;
  a->name = format (0, "tls");
  a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
  a->options[APP_OPTIONS_RX_FIFO_SIZE] = fifo_size;
  a->options[APP_OPTIONS_TX_FIFO_SIZE] = fifo_size;
  a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
  a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;

  if (vnet_application_attach (a))
    {
      clib_warning ("failed to attach tls app");
      return clib_error_return (0, "failed to attach tls app");
    }

  if (!tm->ca_cert_path)
    tm->ca_cert_path = TLS_CA_CERT_PATH;

  tm->app_index = a->app_index;
  clib_rwlock_init (&tm->half_open_rwlock);

  vec_validate (tm->rx_bufs, num_threads - 1);
  vec_validate (tm->tx_bufs, num_threads - 1);

  transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto,
			       FIB_PROTOCOL_IP4, ~0);
  transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto,
			       FIB_PROTOCOL_IP6, ~0);
  vec_free (a->name);
  return 0;
}

VLIB_INIT_FUNCTION (tls_init);

static clib_error_t *
tls_config_fn (vlib_main_t * vm, unformat_input_t * input)
{
  tls_main_t *tm = &tls_main;
  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "use-test-cert-in-ca"))
	tm->use_test_cert_in_ca = 1;
      else if (unformat (input, "ca-cert-path %s", &tm->ca_cert_path))
	;
      else
	return clib_error_return (0, "unknown input `%U'",
				  format_unformat_error, input);
    }
  return 0;
}

VLIB_EARLY_CONFIG_FUNCTION (tls_config_fn, "tls");

tls_main_t *
vnet_tls_get_main (void)
{
  return &tls_main;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */