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authorMohsin Kazmi <sykazmi@cisco.com>2018-08-27 16:11:59 +0200
committerMohsin Kazmi <sykazmi@cisco.com>2018-08-27 16:28:15 +0200
commitf8520159d5e5b4988f56919d34aae3ee7ce38cdb (patch)
tree29af482860dd2f58dac646ea78a91076f7048e47 /src/plugins/srv6-am
parentb3abec7c1f936ee4950d14cc8a9c34c729551f9f (diff)
cmake: Fix plugins .h includes
Change-Id: I90600d000afb02e8969f3c01bcf9e4b5c10a7d39 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/plugins/srv6-am')
-rw-r--r--src/plugins/srv6-am/CMakeLists.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/plugins/srv6-am/CMakeLists.txt b/src/plugins/srv6-am/CMakeLists.txt
index 650142fd181..821c232e1c2 100644
--- a/src/plugins/srv6-am/CMakeLists.txt
+++ b/src/plugins/srv6-am/CMakeLists.txt
@@ -15,4 +15,7 @@ add_vpp_plugin(srv6am
SOURCES
am.c
node.c
+
+ INSTALL_HEADERS
+ am.h
)
id='n170' href='#n170'>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 1001 1002 1003 1004 1005 1006 1007 
/*
 * Copyright (c) 2018-2019 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);

void
tls_disconnect_transport (tls_ctx_t * ctx)
{
  vnet_disconnect_args_t a = {
    .handle = ctx->tls_session_handle,
    .app_index = tls_main.app_index,
  };

  if (vnet_disconnect_session (&a))
    clib_warning ("disconnect returned");
}

crypto_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 CRYPTO_ENGINE_NONE;
}

int
tls_add_vpp_q_rx_evt (session_t * s)
{
  if (svm_fifo_set_event (s->rx_fifo))
    session_send_io_evt_to_thread (s->rx_fifo, SESSION_IO_EVT_RX);
  return 0;
}

int
tls_add_vpp_q_builtin_rx_evt (session_t * s)
{
  if (svm_fifo_set_event (s->rx_fifo))
    session_send_io_evt_to_thread (s->rx_fifo, SESSION_IO_EVT_BUILTIN_RX);
  return 0;
}

int
tls_add_vpp_q_tx_evt (session_t * s)
{
  if (svm_fifo_set_event (s->tx_fifo))
    session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
  return 0;
}

static inline int
tls_add_app_q_evt (app_worker_t * app, session_t * app_session)
{
  return app_worker_lock_and_send_event (app, app_session, SESSION_IO_EVT_RX);
}

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

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

void
tls_listener_ctx_free (tls_ctx_t * ctx)
{
  if (CLIB_DEBUG)
    memset (ctx, 0xfb, sizeof (*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);
      ctx_index = ctx - tm->half_open_ctx_pool;
      clib_rwlock_writer_unlock (&tm->half_open_rwlock);
    }
  else
    {
      /* reader lock assumption: only main thread will call pool_get */
      clib_rwlock_reader_lock (&tm->half_open_rwlock);
      pool_get (tm->half_open_ctx_pool, ctx);
      ctx_index = ctx - tm->half_open_ctx_pool;
      clib_rwlock_reader_unlock (&tm->half_open_rwlock);
    }
  clib_memset (ctx, 0, sizeof (*ctx));
  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, session_t * app_session)
{
  app_worker_t *app_wrk;
  app_wrk = app_worker_get_if_valid (app_session->app_wrk_index);
  if (PREDICT_TRUE (app_wrk != 0))
    tls_add_app_q_evt (app_wrk, app_session);
}

int
tls_notify_app_accept (tls_ctx_t * ctx)
{
  session_t *app_listener, *app_session;
  app_worker_t *app_wrk;
  tls_ctx_t *lctx;
  int rv;

  lctx = tls_listener_ctx_get (ctx->listener_ctx_index);
  app_listener = listen_session_get_from_handle (lctx->app_session_handle);

  app_session = session_get (ctx->c_s_index, ctx->c_thread_index);
  app_session->app_wrk_index = ctx->parent_app_wrk_index;
  app_session->connection_index = ctx->tls_ctx_handle;
  app_session->session_type = app_listener->session_type;
  app_session->listener_handle = listen_session_get_handle (app_listener);
  app_session->session_state = SESSION_STATE_ACCEPTING;

  if ((rv = app_worker_init_accepted (app_session)))
    {
      TLS_DBG (1, "failed to allocate fifos");
      session_free (app_session);
      return rv;
    }
  ctx->app_session_handle = session_handle (app_session);
  ctx->parent_app_wrk_index = app_session->app_wrk_index;
  app_wrk = app_worker_get (app_session->app_wrk_index);
  return app_worker_accept_notify (app_wrk, app_session);
}

int
tls_notify_app_connected (tls_ctx_t * ctx, session_error_t err)
{
  session_t *app_session;
  app_worker_t *app_wrk;

  app_wrk = app_worker_get_if_valid (ctx->parent_app_wrk_index);
  if (!app_wrk)
    {
      tls_disconnect_transport (ctx);
      return -1;
    }

  if (err)
    goto failed;

  app_session = session_get (ctx->c_s_index, ctx->c_thread_index);
  app_session->app_wrk_index = ctx->parent_app_wrk_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 ((err = app_worker_init_connected (app_wrk, app_session)))
    goto failed;

  app_session->session_state = SESSION_STATE_READY;
  if (app_worker_connect_notify (app_wrk, app_session,
				 SESSION_E_NONE, ctx->parent_app_api_context))
    {
      TLS_DBG (1, "failed to notify app");
      app_session->session_state = SESSION_STATE_CONNECTING;
      tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
      return -1;
    }

  ctx->app_session_handle = session_handle (app_session);

  return 0;

failed:
  /* Free app session pre-allocated when transport was established */
  session_free (session_get (ctx->c_s_index, ctx->c_thread_index));
  ctx->no_app_session = 1;
  tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
  return app_worker_connect_notify (app_wrk, 0, err,
				    ctx->parent_app_api_context);
}

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

static inline u32
tls_ctx_alloc (crypto_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 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, session_t * app_session,
	       transport_send_params_t * sp)
{
  u32 n_wrote;

  sp->max_burst_size = sp->max_burst_size * TRANSPORT_PACER_MIN_MSS;
  n_wrote = tls_vfts[ctx->tls_ctx_engine].ctx_write (ctx, app_session, sp);
  return n_wrote > 0 ? clib_max (n_wrote / TRANSPORT_PACER_MIN_MSS, 1) : 0;
}

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

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

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

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

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 (session_t * s)
{
  tls_ctx_t *ctx;
  transport_connection_t *tc;
  session_t *app_session;

  ctx = tls_ctx_get (s->opaque);
  ctx->is_passive_close = 1;
  tc = &ctx->connection;
  if (tls_ctx_handshake_is_over (ctx))
    {
      session_transport_reset_notify (tc);
      session_transport_closed_notify (tc);
      tls_disconnect_transport (ctx);
    }
  else
    if ((app_session =
	 session_get_if_valid (ctx->c_s_index, ctx->c_thread_index)))
    {
      session_free (app_session);
      ctx->c_s_index = SESSION_INVALID_INDEX;
      tls_disconnect_transport (ctx);
    }
}

int
tls_add_segment_callback (u32 client_index, u64 segment_handle)
{
  /* No-op for builtin */
  return 0;
}

int
tls_del_segment_callback (u32 client_index, u64 segment_handle)
{
  return 0;
}

void
tls_session_disconnect_callback (session_t * tls_session)
{
  tls_ctx_t *ctx;

  TLS_DBG (1, "TCP disconnecting handle %x session %u", tls_session->opaque,
	   tls_session->session_index);

  ASSERT (tls_session->thread_index == vlib_get_thread_index ()
	  || vlib_thread_is_main_w_barrier ());

  ctx = tls_ctx_get_w_thread (tls_session->opaque, tls_session->thread_index);
  ctx->is_passive_close = 1;
  tls_ctx_transport_close (ctx);
}

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

  tls_listener =
    listen_session_get_from_handle (tls_session->listener_handle);
  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;
  ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
  ctx->ckpair_index = lctx->ckpair_index;

  /* Preallocate app session. Avoids allocating a session post handshake
   * on tls_session rx and potentially invalidating the session pool */
  app_session = session_alloc (ctx->c_thread_index);
  app_session->session_state = SESSION_STATE_CREATED;
  ctx->c_s_index = app_session->session_index;

  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_rx_callback (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_app_tx_callback (session_t * tls_session)
{
  tls_ctx_t *ctx;

  ctx = tls_ctx_get (tls_session->opaque);
  transport_connection_reschedule (&ctx->connection);

  return 0;
}

int
tls_session_connected_callback (u32 tls_app_index, u32 ho_ctx_index,
				session_t * tls_session, session_error_t err)
{
  session_t *app_session;
  tls_ctx_t *ho_ctx, *ctx;
  u32 ctx_handle;

  ho_ctx = tls_ctx_half_open_get (ho_ctx_index);

  if (err)
    {
      app_worker_t *app_wrk;
      u32 api_context;
      int rv = 0;

      app_wrk = app_worker_get_if_valid (ho_ctx->parent_app_wrk_index);
      if (app_wrk)
	{
	  api_context = ho_ctx->c_s_index;
	  app_worker_connect_notify (app_wrk, 0, err, api_context);
	}
      tls_ctx_half_open_reader_unlock ();
      tls_ctx_half_open_free (ho_ctx_index);
      return rv;
    }

  ctx_handle = tls_ctx_alloc (ho_ctx->tls_ctx_engine);
  ctx = tls_ctx_get (ctx_handle);
  clib_memcpy_fast (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;
  ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;

  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;

  /* Preallocate app session. Avoids allocating a session post handshake
   * on tls_session rx and potentially invalidating the session pool */
  app_session = session_alloc (ctx->c_thread_index);
  app_session->session_state = SESSION_STATE_CREATED;
  ctx->c_s_index = app_session->session_index;

  return tls_ctx_init_client (ctx);
}

static void
tls_app_session_cleanup (session_t * s, session_cleanup_ntf_t ntf)
{
  tls_ctx_t *ctx;

  if (ntf == SESSION_CLEANUP_TRANSPORT)
    {
      /* Allow cleanup of tcp session */
      if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
	session_close (s);
      return;
    }

  ctx = tls_ctx_get (s->opaque);
  if (!ctx->no_app_session)
    session_transport_delete_notify (&ctx->connection);
  tls_ctx_free (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,
  .session_cleanup_callback = tls_app_session_cleanup,
};
/* *INDENT-ON* */

int
tls_connect (transport_endpoint_cfg_t * tep)
{
  vnet_connect_args_t _cargs = { {}, }, *cargs = &_cargs;
  session_endpoint_cfg_t *sep;
  crypto_engine_type_t engine_type;
  tls_main_t *tm = &tls_main;
  app_worker_t *app_wrk;
  application_t *app;
  tls_ctx_t *ctx;
  u32 ctx_index;
  int rv;

  sep = (session_endpoint_cfg_t *) tep;
  app_wrk = app_worker_get (sep->app_wrk_index);
  app = application_get (app_wrk->app_index);
  engine_type = tls_get_engine_type (app->tls_engine);
  if (engine_type == CRYPTO_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_wrk_index = sep->app_wrk_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 ();

  app_worker_alloc_connects_segment_manager (app_wrk);
  ctx->tls_ctx_engine = engine_type;

  clib_memcpy_fast (&cargs->sep, sep, sizeof (session_endpoint_t));
  cargs->sep.transport_proto = TRANSPORT_PROTO_TCP;
  cargs->app_index = tm->app_index;
  cargs->api_context = ctx_index;
  cargs->sep_ext.ns_index = app->ns_index;
  if ((rv = vnet_connect (cargs)))
    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)
{
  tls_ctx_t *ctx;

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

  ctx = tls_ctx_get (ctx_handle);
  tls_ctx_app_close (ctx);
}

u32
tls_start_listen (u32 app_listener_index, transport_endpoint_t * tep)
{
  vnet_listen_args_t _bargs, *args = &_bargs;
  app_worker_t *app_wrk;
  tls_main_t *tm = &tls_main;
  session_handle_t tls_al_handle;
  session_endpoint_cfg_t *sep;
  session_t *tls_listener;
  session_t *app_listener;
  crypto_engine_type_t engine_type;
  application_t *app;
  app_listener_t *al;
  tls_ctx_t *lctx;
  u32 lctx_index;

  sep = (session_endpoint_cfg_t *) tep;
  app_wrk = app_worker_get (sep->app_wrk_index);
  app = application_get (app_wrk->app_index);
  engine_type = tls_get_engine_type (app->tls_engine);
  if (engine_type == CRYPTO_ENGINE_NONE)
    {
      clib_warning ("No tls engine_type available");
      return -1;
    }

  clib_memset (args, 0, sizeof (*args));
  args->app_index = tm->app_index;
  args->sep_ext = *sep;
  args->sep_ext.ns_index = app->ns_index;
  args->sep_ext.transport_proto = TRANSPORT_PROTO_TCP;
  if (vnet_listen (args))
    return -1;

  lctx_index = tls_listener_ctx_alloc ();
  tls_al_handle = args->handle;
  al = app_listener_get_w_handle (tls_al_handle);
  tls_listener = app_listener_get_session (al);
  tls_listener->opaque = lctx_index;

  app_listener = listen_session_get (app_listener_index);

  lctx = tls_listener_ctx_get (lctx_index);
  lctx->parent_app_wrk_index = sep->app_wrk_index;
  lctx->tls_session_handle = tls_al_handle;
  lctx->app_session_handle = listen_session_get_handle (app_listener);
  lctx->tcp_is_ip4 = sep->is_ip4;
  lctx->tls_ctx_engine = engine_type;
  lctx->ckpair_index = sep->ckpair_index;

  if (tls_vfts[engine_type].ctx_start_listen (lctx))
    {
      vnet_unlisten_args_t a = {
	.handle = lctx->tls_session_handle,
	.app_index = tls_main.app_index,
	.wrk_map_index = 0
      };
      if ((vnet_unlisten (&a)))
	clib_warning ("unlisten returned");
      tls_listener_ctx_free (lctx);
      lctx_index = SESSION_INVALID_INDEX;
    }

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

u32
tls_stop_listen (u32 lctx_index)
{
  session_endpoint_t sep = SESSION_ENDPOINT_NULL;
  crypto_engine_type_t engine_type;
  transport_connection_t *lc;
  tls_ctx_t *lctx;
  session_t *ls;
  int rv;

  lctx = tls_listener_ctx_get (lctx_index);

  /* Cleanup listener from session lookup table */
  ls = session_get_from_handle (lctx->tls_session_handle);
  lc = session_get_transport (ls);

  sep.fib_index = lc->fib_index;
  sep.port = lc->lcl_port;
  sep.is_ip4 = lc->is_ip4;
  sep.transport_proto = TRANSPORT_PROTO_TLS;
  clib_memcpy (&sep.ip, &lc->lcl_ip, sizeof (lc->lcl_ip));
  session_lookup_del_session_endpoint2 (&sep);

  vnet_unlisten_args_t a = {
    .handle = lctx->tls_session_handle,
    .app_index = tls_main.app_index,
    .wrk_map_index = 0		/* default wrk */
  };
  if ((rv = vnet_unlisten (&a)))
    clib_warning ("unlisten returned %d", rv);

  engine_type = lctx->tls_ctx_engine;
  tls_vfts[engine_type].ctx_stop_listen (lctx);

  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;
}

int
tls_custom_tx_callback (void *session, transport_send_params_t * sp)
{
  session_t *app_session = (session_t *) session;
  tls_ctx_t *ctx;

  if (PREDICT_FALSE (app_session->session_state
		     >= SESSION_STATE_TRANSPORT_CLOSED))
    return 0;

  ctx = tls_ctx_get (app_session->connection_index);
  return tls_ctx_write (ctx, app_session, sp);
}

u8 *
format_tls_ctx (u8 * s, va_list * args)
{
  u32 tcp_si, tcp_ti, ctx_index, ctx_engine;
  tls_ctx_t *ctx = va_arg (*args, tls_ctx_t *);

  session_parse_handle (ctx->tls_session_handle, &tcp_si, &tcp_ti);
  tls_ctx_parse_handle (ctx->tls_ctx_handle, &ctx_index, &ctx_engine);
  s = format (s, "[%d:%d][TLS] app_wrk %u index %u engine %u tcp %d:%d",
	      ctx->c_thread_index, ctx->c_s_index,
	      ctx->parent_app_wrk_index, ctx_index,
	      ctx_engine, tcp_ti, tcp_si);

  return s;
}

static u8 *
format_tls_listener_ctx (u8 * s, va_list * args)
{
  session_t *tls_listener;
  app_listener_t *al;
  tls_ctx_t *ctx;

  ctx = va_arg (*args, tls_ctx_t *);

  al = app_listener_get_w_handle (ctx->tls_session_handle);
  tls_listener = app_listener_get_session (al);
  s = format (s, "[%d:%d][TLS] app_wrk %u engine %u tcp %d:%d",
	      ctx->c_thread_index, ctx->c_s_index,
	      ctx->parent_app_wrk_index, ctx->tls_ctx_engine,
	      tls_listener->thread_index, tls_listener->session_index);

  return s;
}

static u8 *
format_tls_ctx_state (u8 * s, va_list * args)
{
  tls_ctx_t *ctx;
  session_t *ts;

  ctx = va_arg (*args, tls_ctx_t *);
  ts = session_get (ctx->c_s_index, ctx->c_thread_index);
  if (ts->session_state == SESSION_STATE_LISTENING)
    s = format (s, "%s", "LISTEN");
  else
    {
      if (ts->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
	s = format (s, "%s", "CLOSED");
      else if (ts->session_state == SESSION_STATE_APP_CLOSED)
	s = format (s, "%s", "APP-CLOSED");
      else if (ts->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
	s = format (s, "%s", "CLOSING");
      else if (tls_ctx_handshake_is_over (ctx))
	s = format (s, "%s", "ESTABLISHED");
      else
	s = format (s, "%s", "HANDSHAKE");
    }

  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, "%-" SESSION_CLI_ID_LEN "U", format_tls_ctx, ctx);
  if (verbose)
    {
      s = format (s, "%-" SESSION_CLI_STATE_LEN "U", format_tls_ctx_state,
		  ctx);
      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);
  u32 __clib_unused thread_index = va_arg (*args, u32);
  u32 verbose = va_arg (*args, u32);
  tls_ctx_t *ctx = tls_listener_ctx_get (tc_index);

  s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_tls_listener_ctx, ctx);
  if (verbose)
    s = format (s, "%-" SESSION_CLI_STATE_LEN "U", format_tls_ctx_state, ctx);
  return s;
}

u8 *
format_tls_half_open (u8 * s, va_list * args)
{
  u32 tc_index = va_arg (*args, u32);
  u32 __clib_unused thread_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_wrk_index);
  tls_ctx_half_open_reader_unlock ();
  return s;
}

static void
tls_transport_endpoint_get (u32 ctx_handle, u32 thread_index,
			    transport_endpoint_t * tep, u8 is_lcl)
{
  tls_ctx_t *ctx = tls_ctx_get_w_thread (ctx_handle, thread_index);
  session_t *tcp_session;

  tcp_session = session_get_from_handle (ctx->tls_session_handle);
  session_get_endpoint (tcp_session, tep, is_lcl);
}

static void
tls_transport_listener_endpoint_get (u32 ctx_handle,
				     transport_endpoint_t * tep, u8 is_lcl)
{
  session_t *tls_listener;
  app_listener_t *al;
  tls_ctx_t *ctx = tls_listener_ctx_get (ctx_handle);

  al = app_listener_get_w_handle (ctx->tls_session_handle);
  tls_listener = app_listener_get_session (al);
  session_get_endpoint (tls_listener, tep, is_lcl);
}

/* *INDENT-OFF* */
static const transport_proto_vft_t tls_proto = {
  .connect = tls_connect,
  .close = tls_disconnect,
  .start_listen = tls_start_listen,
  .stop_listen = tls_stop_listen,
  .get_connection = tls_connection_get,
  .get_listener = tls_listener_get,
  .custom_tx = tls_custom_tx_callback,
  .format_connection = format_tls_connection,
  .format_half_open = format_tls_half_open,
  .format_listener = format_tls_listener,
  .get_transport_endpoint = tls_transport_endpoint_get,
  .get_transport_listener_endpoint = tls_transport_listener_endpoint_get,
  .transport_options = {
    .name = "tls",
    .short_name = "J",
    .tx_type = TRANSPORT_TX_INTERNAL,
    .service_type = TRANSPORT_SERVICE_APP,
  },
};
/* *INDENT-ON* */

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

static clib_error_t *
tls_init (vlib_main_t * vm)
{
  u32 add_segment_size = 256 << 20, first_seg_size = 32 << 20;
  vlib_thread_main_t *vtm = vlib_get_thread_main ();
  u32 num_threads, fifo_size = 128 << 12;
  vnet_app_attach_args_t _a, *a = &_a;
  u64 options[APP_OPTIONS_N_OPTIONS];
  tls_main_t *tm = &tls_main;

  first_seg_size = tm->first_seg_size ? tm->first_seg_size : first_seg_size;
  fifo_size = tm->fifo_size ? tm->fifo_size : fifo_size;
  num_threads = 1 /* main thread */  + vtm->n_threads;

  clib_memset (a, 0, sizeof (*a));
  clib_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] = first_seg_size;
  a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = add_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;
  a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_IS_TRANSPORT_APP;

  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;
  uword tmp;
  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 if (unformat (input, "first-segment-size %U", unformat_memory_size,
			 &tm->first_seg_size))
	;
      else if (unformat (input, "fifo-size %U", unformat_memory_size, &tmp))
	{
	  if (tmp >= 0x100000000ULL)
	    {
	      return clib_error_return
		(0, "fifo-size %llu (0x%llx) too large", tmp, tmp);
	    }
	  tm->fifo_size = tmp;
	}
      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:
 */